diff options
Diffstat (limited to 'thirdparty/mbedtls/library/rsa.c')
| -rw-r--r-- | thirdparty/mbedtls/library/rsa.c | 2266 |
1 files changed, 1156 insertions, 1110 deletions
diff --git a/thirdparty/mbedtls/library/rsa.c b/thirdparty/mbedtls/library/rsa.c index 9c39fa5d91..f44b2c38b8 100644 --- a/thirdparty/mbedtls/library/rsa.c +++ b/thirdparty/mbedtls/library/rsa.c @@ -62,68 +62,72 @@ #if !defined(MBEDTLS_RSA_ALT) /* Parameter validation macros */ -#define RSA_VALIDATE_RET( cond ) \ - MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_RSA_BAD_INPUT_DATA ) -#define RSA_VALIDATE( cond ) \ - MBEDTLS_INTERNAL_VALIDATE( cond ) - -int mbedtls_rsa_import( mbedtls_rsa_context *ctx, - const mbedtls_mpi *N, - const mbedtls_mpi *P, const mbedtls_mpi *Q, - const mbedtls_mpi *D, const mbedtls_mpi *E ) +#define RSA_VALIDATE_RET(cond) \ + MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_RSA_BAD_INPUT_DATA) +#define RSA_VALIDATE(cond) \ + MBEDTLS_INTERNAL_VALIDATE(cond) + +int mbedtls_rsa_import(mbedtls_rsa_context *ctx, + const mbedtls_mpi *N, + const mbedtls_mpi *P, const mbedtls_mpi *Q, + const mbedtls_mpi *D, const mbedtls_mpi *E) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); - if( ( N != NULL && ( ret = mbedtls_mpi_copy( &ctx->N, N ) ) != 0 ) || - ( P != NULL && ( ret = mbedtls_mpi_copy( &ctx->P, P ) ) != 0 ) || - ( Q != NULL && ( ret = mbedtls_mpi_copy( &ctx->Q, Q ) ) != 0 ) || - ( D != NULL && ( ret = mbedtls_mpi_copy( &ctx->D, D ) ) != 0 ) || - ( E != NULL && ( ret = mbedtls_mpi_copy( &ctx->E, E ) ) != 0 ) ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if ((N != NULL && (ret = mbedtls_mpi_copy(&ctx->N, N)) != 0) || + (P != NULL && (ret = mbedtls_mpi_copy(&ctx->P, P)) != 0) || + (Q != NULL && (ret = mbedtls_mpi_copy(&ctx->Q, Q)) != 0) || + (D != NULL && (ret = mbedtls_mpi_copy(&ctx->D, D)) != 0) || + (E != NULL && (ret = mbedtls_mpi_copy(&ctx->E, E)) != 0)) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); } - if( N != NULL ) - ctx->len = mbedtls_mpi_size( &ctx->N ); + if (N != NULL) { + ctx->len = mbedtls_mpi_size(&ctx->N); + } - return( 0 ); + return 0; } -int mbedtls_rsa_import_raw( mbedtls_rsa_context *ctx, - unsigned char const *N, size_t N_len, - unsigned char const *P, size_t P_len, - unsigned char const *Q, size_t Q_len, - unsigned char const *D, size_t D_len, - unsigned char const *E, size_t E_len ) +int mbedtls_rsa_import_raw(mbedtls_rsa_context *ctx, + unsigned char const *N, size_t N_len, + unsigned char const *P, size_t P_len, + unsigned char const *Q, size_t Q_len, + unsigned char const *D, size_t D_len, + unsigned char const *E, size_t E_len) { int ret = 0; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); - if( N != NULL ) - { - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &ctx->N, N, N_len ) ); - ctx->len = mbedtls_mpi_size( &ctx->N ); + if (N != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&ctx->N, N, N_len)); + ctx->len = mbedtls_mpi_size(&ctx->N); } - if( P != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &ctx->P, P, P_len ) ); + if (P != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&ctx->P, P, P_len)); + } - if( Q != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &ctx->Q, Q, Q_len ) ); + if (Q != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&ctx->Q, Q, Q_len)); + } - if( D != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &ctx->D, D, D_len ) ); + if (D != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&ctx->D, D, D_len)); + } - if( E != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &ctx->E, E, E_len ) ); + if (E != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&ctx->E, E, E_len)); + } cleanup: - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if (ret != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); + } - return( 0 ); + return 0; } /* @@ -131,8 +135,8 @@ cleanup: * that the RSA primitives will be able to execute without error. * It does *not* make guarantees for consistency of the parameters. */ -static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv, - int blinding_needed ) +static int rsa_check_context(mbedtls_rsa_context const *ctx, int is_priv, + int blinding_needed) { #if !defined(MBEDTLS_RSA_NO_CRT) /* blinding_needed is only used for NO_CRT to decide whether @@ -140,10 +144,9 @@ static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv, ((void) blinding_needed); #endif - if( ctx->len != mbedtls_mpi_size( &ctx->N ) || - ctx->len > MBEDTLS_MPI_MAX_SIZE ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (ctx->len != mbedtls_mpi_size(&ctx->N) || + ctx->len > MBEDTLS_MPI_MAX_SIZE) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } /* @@ -152,23 +155,21 @@ static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv, /* Modular exponentiation wrt. N is always used for * RSA public key operations. */ - if( mbedtls_mpi_cmp_int( &ctx->N, 0 ) <= 0 || - mbedtls_mpi_get_bit( &ctx->N, 0 ) == 0 ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mbedtls_mpi_cmp_int(&ctx->N, 0) <= 0 || + mbedtls_mpi_get_bit(&ctx->N, 0) == 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #if !defined(MBEDTLS_RSA_NO_CRT) /* Modular exponentiation for P and Q is only * used for private key operations and if CRT * is used. */ - if( is_priv && - ( mbedtls_mpi_cmp_int( &ctx->P, 0 ) <= 0 || - mbedtls_mpi_get_bit( &ctx->P, 0 ) == 0 || - mbedtls_mpi_cmp_int( &ctx->Q, 0 ) <= 0 || - mbedtls_mpi_get_bit( &ctx->Q, 0 ) == 0 ) ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (is_priv && + (mbedtls_mpi_cmp_int(&ctx->P, 0) <= 0 || + mbedtls_mpi_get_bit(&ctx->P, 0) == 0 || + mbedtls_mpi_cmp_int(&ctx->Q, 0) <= 0 || + mbedtls_mpi_get_bit(&ctx->Q, 0) == 0)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #endif /* !MBEDTLS_RSA_NO_CRT */ @@ -177,20 +178,21 @@ static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv, */ /* Always need E for public key operations */ - if( mbedtls_mpi_cmp_int( &ctx->E, 0 ) <= 0 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mbedtls_mpi_cmp_int(&ctx->E, 0) <= 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } #if defined(MBEDTLS_RSA_NO_CRT) /* For private key operations, use D or DP & DQ * as (unblinded) exponents. */ - if( is_priv && mbedtls_mpi_cmp_int( &ctx->D, 0 ) <= 0 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (is_priv && mbedtls_mpi_cmp_int(&ctx->D, 0) <= 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } #else - if( is_priv && - ( mbedtls_mpi_cmp_int( &ctx->DP, 0 ) <= 0 || - mbedtls_mpi_cmp_int( &ctx->DQ, 0 ) <= 0 ) ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (is_priv && + (mbedtls_mpi_cmp_int(&ctx->DP, 0) <= 0 || + mbedtls_mpi_cmp_int(&ctx->DQ, 0) <= 0)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #endif /* MBEDTLS_RSA_NO_CRT */ @@ -198,28 +200,26 @@ static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv, * so check that P, Q >= 1 if that hasn't yet been * done as part of 1. */ #if defined(MBEDTLS_RSA_NO_CRT) - if( is_priv && blinding_needed && - ( mbedtls_mpi_cmp_int( &ctx->P, 0 ) <= 0 || - mbedtls_mpi_cmp_int( &ctx->Q, 0 ) <= 0 ) ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (is_priv && blinding_needed && + (mbedtls_mpi_cmp_int(&ctx->P, 0) <= 0 || + mbedtls_mpi_cmp_int(&ctx->Q, 0) <= 0)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #endif /* It wouldn't lead to an error if it wasn't satisfied, * but check for QP >= 1 nonetheless. */ #if !defined(MBEDTLS_RSA_NO_CRT) - if( is_priv && - mbedtls_mpi_cmp_int( &ctx->QP, 0 ) <= 0 ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (is_priv && + mbedtls_mpi_cmp_int(&ctx->QP, 0) <= 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #endif - return( 0 ); + return 0; } -int mbedtls_rsa_complete( mbedtls_rsa_context *ctx ) +int mbedtls_rsa_complete(mbedtls_rsa_context *ctx) { int ret = 0; int have_N, have_P, have_Q, have_D, have_E; @@ -228,18 +228,18 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx ) #endif int n_missing, pq_missing, d_missing, is_pub, is_priv; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); - have_N = ( mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 ); - have_P = ( mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 ); - have_Q = ( mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 ); - have_D = ( mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 ); - have_E = ( mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0 ); + have_N = (mbedtls_mpi_cmp_int(&ctx->N, 0) != 0); + have_P = (mbedtls_mpi_cmp_int(&ctx->P, 0) != 0); + have_Q = (mbedtls_mpi_cmp_int(&ctx->Q, 0) != 0); + have_D = (mbedtls_mpi_cmp_int(&ctx->D, 0) != 0); + have_E = (mbedtls_mpi_cmp_int(&ctx->E, 0) != 0); #if !defined(MBEDTLS_RSA_NO_CRT) - have_DP = ( mbedtls_mpi_cmp_int( &ctx->DP, 0 ) != 0 ); - have_DQ = ( mbedtls_mpi_cmp_int( &ctx->DQ, 0 ) != 0 ); - have_QP = ( mbedtls_mpi_cmp_int( &ctx->QP, 0 ) != 0 ); + have_DP = (mbedtls_mpi_cmp_int(&ctx->DP, 0) != 0); + have_DQ = (mbedtls_mpi_cmp_int(&ctx->DQ, 0) != 0); + have_QP = (mbedtls_mpi_cmp_int(&ctx->QP, 0) != 0); #endif /* @@ -260,44 +260,40 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx ) /* These three alternatives are mutually exclusive */ is_priv = n_missing || pq_missing || d_missing; - if( !is_priv && !is_pub ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (!is_priv && !is_pub) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* * Step 1: Deduce N if P, Q are provided. */ - if( !have_N && have_P && have_Q ) - { - if( ( ret = mbedtls_mpi_mul_mpi( &ctx->N, &ctx->P, - &ctx->Q ) ) != 0 ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if (!have_N && have_P && have_Q) { + if ((ret = mbedtls_mpi_mul_mpi(&ctx->N, &ctx->P, + &ctx->Q)) != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); } - ctx->len = mbedtls_mpi_size( &ctx->N ); + ctx->len = mbedtls_mpi_size(&ctx->N); } /* * Step 2: Deduce and verify all remaining core parameters. */ - if( pq_missing ) - { - ret = mbedtls_rsa_deduce_primes( &ctx->N, &ctx->E, &ctx->D, - &ctx->P, &ctx->Q ); - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); - - } - else if( d_missing ) - { - if( ( ret = mbedtls_rsa_deduce_private_exponent( &ctx->P, - &ctx->Q, - &ctx->E, - &ctx->D ) ) != 0 ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if (pq_missing) { + ret = mbedtls_rsa_deduce_primes(&ctx->N, &ctx->E, &ctx->D, + &ctx->P, &ctx->Q); + if (ret != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); + } + + } else if (d_missing) { + if ((ret = mbedtls_rsa_deduce_private_exponent(&ctx->P, + &ctx->Q, + &ctx->E, + &ctx->D)) != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); } } @@ -307,12 +303,12 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx ) */ #if !defined(MBEDTLS_RSA_NO_CRT) - if( is_priv && ! ( have_DP && have_DQ && have_QP ) ) - { - ret = mbedtls_rsa_deduce_crt( &ctx->P, &ctx->Q, &ctx->D, - &ctx->DP, &ctx->DQ, &ctx->QP ); - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if (is_priv && !(have_DP && have_DQ && have_QP)) { + ret = mbedtls_rsa_deduce_crt(&ctx->P, &ctx->Q, &ctx->D, + &ctx->DP, &ctx->DQ, &ctx->QP); + if (ret != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); + } } #endif /* MBEDTLS_RSA_NO_CRT */ @@ -320,94 +316,98 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx ) * Step 3: Basic sanity checks */ - return( rsa_check_context( ctx, is_priv, 1 ) ); + return rsa_check_context(ctx, is_priv, 1); } -int mbedtls_rsa_export_raw( const mbedtls_rsa_context *ctx, - unsigned char *N, size_t N_len, - unsigned char *P, size_t P_len, - unsigned char *Q, size_t Q_len, - unsigned char *D, size_t D_len, - unsigned char *E, size_t E_len ) +int mbedtls_rsa_export_raw(const mbedtls_rsa_context *ctx, + unsigned char *N, size_t N_len, + unsigned char *P, size_t P_len, + unsigned char *Q, size_t Q_len, + unsigned char *D, size_t D_len, + unsigned char *E, size_t E_len) { int ret = 0; int is_priv; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); /* Check if key is private or public */ is_priv = - mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0; - - if( !is_priv ) - { + mbedtls_mpi_cmp_int(&ctx->N, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->P, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->Q, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->D, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->E, 0) != 0; + + if (!is_priv) { /* If we're trying to export private parameters for a public key, * something must be wrong. */ - if( P != NULL || Q != NULL || D != NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (P != NULL || Q != NULL || D != NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } } - if( N != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &ctx->N, N, N_len ) ); + if (N != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&ctx->N, N, N_len)); + } - if( P != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &ctx->P, P, P_len ) ); + if (P != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&ctx->P, P, P_len)); + } - if( Q != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &ctx->Q, Q, Q_len ) ); + if (Q != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&ctx->Q, Q, Q_len)); + } - if( D != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &ctx->D, D, D_len ) ); + if (D != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&ctx->D, D, D_len)); + } - if( E != NULL ) - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &ctx->E, E, E_len ) ); + if (E != NULL) { + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&ctx->E, E, E_len)); + } cleanup: - return( ret ); + return ret; } -int mbedtls_rsa_export( const mbedtls_rsa_context *ctx, - mbedtls_mpi *N, mbedtls_mpi *P, mbedtls_mpi *Q, - mbedtls_mpi *D, mbedtls_mpi *E ) +int mbedtls_rsa_export(const mbedtls_rsa_context *ctx, + mbedtls_mpi *N, mbedtls_mpi *P, mbedtls_mpi *Q, + mbedtls_mpi *D, mbedtls_mpi *E) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int is_priv; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); /* Check if key is private or public */ is_priv = - mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0; - - if( !is_priv ) - { + mbedtls_mpi_cmp_int(&ctx->N, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->P, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->Q, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->D, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->E, 0) != 0; + + if (!is_priv) { /* If we're trying to export private parameters for a public key, * something must be wrong. */ - if( P != NULL || Q != NULL || D != NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (P != NULL || Q != NULL || D != NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } } /* Export all requested core parameters. */ - if( ( N != NULL && ( ret = mbedtls_mpi_copy( N, &ctx->N ) ) != 0 ) || - ( P != NULL && ( ret = mbedtls_mpi_copy( P, &ctx->P ) ) != 0 ) || - ( Q != NULL && ( ret = mbedtls_mpi_copy( Q, &ctx->Q ) ) != 0 ) || - ( D != NULL && ( ret = mbedtls_mpi_copy( D, &ctx->D ) ) != 0 ) || - ( E != NULL && ( ret = mbedtls_mpi_copy( E, &ctx->E ) ) != 0 ) ) - { - return( ret ); + if ((N != NULL && (ret = mbedtls_mpi_copy(N, &ctx->N)) != 0) || + (P != NULL && (ret = mbedtls_mpi_copy(P, &ctx->P)) != 0) || + (Q != NULL && (ret = mbedtls_mpi_copy(Q, &ctx->Q)) != 0) || + (D != NULL && (ret = mbedtls_mpi_copy(D, &ctx->D)) != 0) || + (E != NULL && (ret = mbedtls_mpi_copy(E, &ctx->E)) != 0)) { + return ret; } - return( 0 ); + return 0; } /* @@ -416,75 +416,74 @@ int mbedtls_rsa_export( const mbedtls_rsa_context *ctx, * write DER encoded RSA keys. The helper function mbedtls_rsa_deduce_crt * can be used in this case. */ -int mbedtls_rsa_export_crt( const mbedtls_rsa_context *ctx, - mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP ) +int mbedtls_rsa_export_crt(const mbedtls_rsa_context *ctx, + mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int is_priv; - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); /* Check if key is private or public */ is_priv = - mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 && - mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0; + mbedtls_mpi_cmp_int(&ctx->N, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->P, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->Q, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->D, 0) != 0 && + mbedtls_mpi_cmp_int(&ctx->E, 0) != 0; - if( !is_priv ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (!is_priv) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } #if !defined(MBEDTLS_RSA_NO_CRT) /* Export all requested blinding parameters. */ - if( ( DP != NULL && ( ret = mbedtls_mpi_copy( DP, &ctx->DP ) ) != 0 ) || - ( DQ != NULL && ( ret = mbedtls_mpi_copy( DQ, &ctx->DQ ) ) != 0 ) || - ( QP != NULL && ( ret = mbedtls_mpi_copy( QP, &ctx->QP ) ) != 0 ) ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if ((DP != NULL && (ret = mbedtls_mpi_copy(DP, &ctx->DP)) != 0) || + (DQ != NULL && (ret = mbedtls_mpi_copy(DQ, &ctx->DQ)) != 0) || + (QP != NULL && (ret = mbedtls_mpi_copy(QP, &ctx->QP)) != 0)) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); } #else - if( ( ret = mbedtls_rsa_deduce_crt( &ctx->P, &ctx->Q, &ctx->D, - DP, DQ, QP ) ) != 0 ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret ) ); + if ((ret = mbedtls_rsa_deduce_crt(&ctx->P, &ctx->Q, &ctx->D, + DP, DQ, QP)) != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_BAD_INPUT_DATA, ret); } #endif - return( 0 ); + return 0; } /* * Initialize an RSA context */ -void mbedtls_rsa_init( mbedtls_rsa_context *ctx, - int padding, - int hash_id ) +void mbedtls_rsa_init(mbedtls_rsa_context *ctx, + int padding, + int hash_id) { - RSA_VALIDATE( ctx != NULL ); - RSA_VALIDATE( padding == MBEDTLS_RSA_PKCS_V15 || - padding == MBEDTLS_RSA_PKCS_V21 ); + RSA_VALIDATE(ctx != NULL); + RSA_VALIDATE(padding == MBEDTLS_RSA_PKCS_V15 || + padding == MBEDTLS_RSA_PKCS_V21); - memset( ctx, 0, sizeof( mbedtls_rsa_context ) ); + memset(ctx, 0, sizeof(mbedtls_rsa_context)); - mbedtls_rsa_set_padding( ctx, padding, hash_id ); + mbedtls_rsa_set_padding(ctx, padding, hash_id); #if defined(MBEDTLS_THREADING_C) /* Set ctx->ver to nonzero to indicate that the mutex has been * initialized and will need to be freed. */ ctx->ver = 1; - mbedtls_mutex_init( &ctx->mutex ); + mbedtls_mutex_init(&ctx->mutex); #endif } /* * Set padding for an existing RSA context */ -void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, - int hash_id ) +void mbedtls_rsa_set_padding(mbedtls_rsa_context *ctx, int padding, + int hash_id) { - RSA_VALIDATE( ctx != NULL ); - RSA_VALIDATE( padding == MBEDTLS_RSA_PKCS_V15 || - padding == MBEDTLS_RSA_PKCS_V21 ); + RSA_VALIDATE(ctx != NULL); + RSA_VALIDATE(padding == MBEDTLS_RSA_PKCS_V15 || + padding == MBEDTLS_RSA_PKCS_V21); ctx->padding = padding; ctx->hash_id = hash_id; @@ -494,9 +493,9 @@ void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, * Get length in bytes of RSA modulus */ -size_t mbedtls_rsa_get_len( const mbedtls_rsa_context *ctx ) +size_t mbedtls_rsa_get_len(const mbedtls_rsa_context *ctx) { - return( ctx->len ); + return ctx->len; } @@ -508,31 +507,31 @@ size_t mbedtls_rsa_get_len( const mbedtls_rsa_context *ctx ) * This generation method follows the RSA key pair generation procedure of * FIPS 186-4 if 2^16 < exponent < 2^256 and nbits = 2048 or nbits = 3072. */ -int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - unsigned int nbits, int exponent ) +int mbedtls_rsa_gen_key(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + unsigned int nbits, int exponent) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; mbedtls_mpi H, G, L; int prime_quality = 0; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( f_rng != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(f_rng != NULL); /* * If the modulus is 1024 bit long or shorter, then the security strength of * the RSA algorithm is less than or equal to 80 bits and therefore an error * rate of 2^-80 is sufficient. */ - if( nbits > 1024 ) + if (nbits > 1024) { prime_quality = MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR; + } - mbedtls_mpi_init( &H ); - mbedtls_mpi_init( &G ); - mbedtls_mpi_init( &L ); + mbedtls_mpi_init(&H); + mbedtls_mpi_init(&G); + mbedtls_mpi_init(&L); - if( nbits < 128 || exponent < 3 || nbits % 2 != 0 ) - { + if (nbits < 128 || exponent < 3 || nbits % 2 != 0) { ret = MBEDTLS_ERR_RSA_BAD_INPUT_DATA; goto cleanup; } @@ -543,54 +542,56 @@ int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx, * 2. GCD( E, (P-1)*(Q-1) ) == 1 * 3. E^-1 mod LCM(P-1, Q-1) > 2^( nbits / 2 ) */ - MBEDTLS_MPI_CHK( mbedtls_mpi_lset( &ctx->E, exponent ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_lset(&ctx->E, exponent)); - do - { - MBEDTLS_MPI_CHK( mbedtls_mpi_gen_prime( &ctx->P, nbits >> 1, - prime_quality, f_rng, p_rng ) ); + do { + MBEDTLS_MPI_CHK(mbedtls_mpi_gen_prime(&ctx->P, nbits >> 1, + prime_quality, f_rng, p_rng)); - MBEDTLS_MPI_CHK( mbedtls_mpi_gen_prime( &ctx->Q, nbits >> 1, - prime_quality, f_rng, p_rng ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_gen_prime(&ctx->Q, nbits >> 1, + prime_quality, f_rng, p_rng)); /* make sure the difference between p and q is not too small (FIPS 186-4 §B.3.3 step 5.4) */ - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_mpi( &H, &ctx->P, &ctx->Q ) ); - if( mbedtls_mpi_bitlen( &H ) <= ( ( nbits >= 200 ) ? ( ( nbits >> 1 ) - 99 ) : 0 ) ) + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_mpi(&H, &ctx->P, &ctx->Q)); + if (mbedtls_mpi_bitlen(&H) <= ((nbits >= 200) ? ((nbits >> 1) - 99) : 0)) { continue; + } /* not required by any standards, but some users rely on the fact that P > Q */ - if( H.s < 0 ) - mbedtls_mpi_swap( &ctx->P, &ctx->Q ); + if (H.s < 0) { + mbedtls_mpi_swap(&ctx->P, &ctx->Q); + } /* Temporarily replace P,Q by P-1, Q-1 */ - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &ctx->P, &ctx->P, 1 ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &ctx->Q, &ctx->Q, 1 ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &H, &ctx->P, &ctx->Q ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&ctx->P, &ctx->P, 1)); + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&ctx->Q, &ctx->Q, 1)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&H, &ctx->P, &ctx->Q)); /* check GCD( E, (P-1)*(Q-1) ) == 1 (FIPS 186-4 §B.3.1 criterion 2(a)) */ - MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &G, &ctx->E, &H ) ); - if( mbedtls_mpi_cmp_int( &G, 1 ) != 0 ) + MBEDTLS_MPI_CHK(mbedtls_mpi_gcd(&G, &ctx->E, &H)); + if (mbedtls_mpi_cmp_int(&G, 1) != 0) { continue; + } /* compute smallest possible D = E^-1 mod LCM(P-1, Q-1) (FIPS 186-4 §B.3.1 criterion 3(b)) */ - MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &G, &ctx->P, &ctx->Q ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_div_mpi( &L, NULL, &H, &G ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &ctx->D, &ctx->E, &L ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_gcd(&G, &ctx->P, &ctx->Q)); + MBEDTLS_MPI_CHK(mbedtls_mpi_div_mpi(&L, NULL, &H, &G)); + MBEDTLS_MPI_CHK(mbedtls_mpi_inv_mod(&ctx->D, &ctx->E, &L)); - if( mbedtls_mpi_bitlen( &ctx->D ) <= ( ( nbits + 1 ) / 2 ) ) // (FIPS 186-4 §B.3.1 criterion 3(a)) + if (mbedtls_mpi_bitlen(&ctx->D) <= ((nbits + 1) / 2)) { // (FIPS 186-4 §B.3.1 criterion 3(a)) continue; + } break; - } - while( 1 ); + } while (1); /* Restore P,Q */ - MBEDTLS_MPI_CHK( mbedtls_mpi_add_int( &ctx->P, &ctx->P, 1 ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_add_int( &ctx->Q, &ctx->Q, 1 ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_int(&ctx->P, &ctx->P, 1)); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_int(&ctx->Q, &ctx->Q, 1)); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->N, &ctx->P, &ctx->Q ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&ctx->N, &ctx->P, &ctx->Q)); - ctx->len = mbedtls_mpi_size( &ctx->N ); + ctx->len = mbedtls_mpi_size(&ctx->N); #if !defined(MBEDTLS_RSA_NO_CRT) /* @@ -598,29 +599,29 @@ int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx, * DQ = D mod (Q - 1) * QP = Q^-1 mod P */ - MBEDTLS_MPI_CHK( mbedtls_rsa_deduce_crt( &ctx->P, &ctx->Q, &ctx->D, - &ctx->DP, &ctx->DQ, &ctx->QP ) ); + MBEDTLS_MPI_CHK(mbedtls_rsa_deduce_crt(&ctx->P, &ctx->Q, &ctx->D, + &ctx->DP, &ctx->DQ, &ctx->QP)); #endif /* MBEDTLS_RSA_NO_CRT */ /* Double-check */ - MBEDTLS_MPI_CHK( mbedtls_rsa_check_privkey( ctx ) ); + MBEDTLS_MPI_CHK(mbedtls_rsa_check_privkey(ctx)); cleanup: - mbedtls_mpi_free( &H ); - mbedtls_mpi_free( &G ); - mbedtls_mpi_free( &L ); + mbedtls_mpi_free(&H); + mbedtls_mpi_free(&G); + mbedtls_mpi_free(&L); - if( ret != 0 ) - { - mbedtls_rsa_free( ctx ); + if (ret != 0) { + mbedtls_rsa_free(ctx); - if( ( -ret & ~0x7f ) == 0 ) - ret = MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_KEY_GEN_FAILED, ret ); - return( ret ); + if ((-ret & ~0x7f) == 0) { + ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_KEY_GEN_FAILED, ret); + } + return ret; } - return( 0 ); + return 0; } #endif /* MBEDTLS_GENPRIME */ @@ -628,130 +629,127 @@ cleanup: /* * Check a public RSA key */ -int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx ) +int mbedtls_rsa_check_pubkey(const mbedtls_rsa_context *ctx) { - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); - if( rsa_check_context( ctx, 0 /* public */, 0 /* no blinding */ ) != 0 ) - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (rsa_check_context(ctx, 0 /* public */, 0 /* no blinding */) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; + } - if( mbedtls_mpi_bitlen( &ctx->N ) < 128 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_mpi_bitlen(&ctx->N) < 128) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } - if( mbedtls_mpi_get_bit( &ctx->E, 0 ) == 0 || - mbedtls_mpi_bitlen( &ctx->E ) < 2 || - mbedtls_mpi_cmp_mpi( &ctx->E, &ctx->N ) >= 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_mpi_get_bit(&ctx->E, 0) == 0 || + mbedtls_mpi_bitlen(&ctx->E) < 2 || + mbedtls_mpi_cmp_mpi(&ctx->E, &ctx->N) >= 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } - return( 0 ); + return 0; } /* * Check for the consistency of all fields in an RSA private key context */ -int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx ) +int mbedtls_rsa_check_privkey(const mbedtls_rsa_context *ctx) { - RSA_VALIDATE_RET( ctx != NULL ); + RSA_VALIDATE_RET(ctx != NULL); - if( mbedtls_rsa_check_pubkey( ctx ) != 0 || - rsa_check_context( ctx, 1 /* private */, 1 /* blinding */ ) != 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_rsa_check_pubkey(ctx) != 0 || + rsa_check_context(ctx, 1 /* private */, 1 /* blinding */) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } - if( mbedtls_rsa_validate_params( &ctx->N, &ctx->P, &ctx->Q, - &ctx->D, &ctx->E, NULL, NULL ) != 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_rsa_validate_params(&ctx->N, &ctx->P, &ctx->Q, + &ctx->D, &ctx->E, NULL, NULL) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } #if !defined(MBEDTLS_RSA_NO_CRT) - else if( mbedtls_rsa_validate_crt( &ctx->P, &ctx->Q, &ctx->D, - &ctx->DP, &ctx->DQ, &ctx->QP ) != 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + else if (mbedtls_rsa_validate_crt(&ctx->P, &ctx->Q, &ctx->D, + &ctx->DP, &ctx->DQ, &ctx->QP) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } #endif - return( 0 ); + return 0; } /* * Check if contexts holding a public and private key match */ -int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub, - const mbedtls_rsa_context *prv ) +int mbedtls_rsa_check_pub_priv(const mbedtls_rsa_context *pub, + const mbedtls_rsa_context *prv) { - RSA_VALIDATE_RET( pub != NULL ); - RSA_VALIDATE_RET( prv != NULL ); + RSA_VALIDATE_RET(pub != NULL); + RSA_VALIDATE_RET(prv != NULL); - if( mbedtls_rsa_check_pubkey( pub ) != 0 || - mbedtls_rsa_check_privkey( prv ) != 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_rsa_check_pubkey(pub) != 0 || + mbedtls_rsa_check_privkey(prv) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } - if( mbedtls_mpi_cmp_mpi( &pub->N, &prv->N ) != 0 || - mbedtls_mpi_cmp_mpi( &pub->E, &prv->E ) != 0 ) - { - return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); + if (mbedtls_mpi_cmp_mpi(&pub->N, &prv->N) != 0 || + mbedtls_mpi_cmp_mpi(&pub->E, &prv->E) != 0) { + return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; } - return( 0 ); + return 0; } /* * Do an RSA public key operation */ -int mbedtls_rsa_public( mbedtls_rsa_context *ctx, - const unsigned char *input, - unsigned char *output ) +int mbedtls_rsa_public(mbedtls_rsa_context *ctx, + const unsigned char *input, + unsigned char *output) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t olen; mbedtls_mpi T; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( input != NULL ); - RSA_VALIDATE_RET( output != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(input != NULL); + RSA_VALIDATE_RET(output != NULL); - if( rsa_check_context( ctx, 0 /* public */, 0 /* no blinding */ ) ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (rsa_check_context(ctx, 0 /* public */, 0 /* no blinding */)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - mbedtls_mpi_init( &T ); + mbedtls_mpi_init(&T); #if defined(MBEDTLS_THREADING_C) - if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) { + return ret; + } #endif - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &T, input, ctx->len ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&T, input, ctx->len)); - if( mbedtls_mpi_cmp_mpi( &T, &ctx->N ) >= 0 ) - { + if (mbedtls_mpi_cmp_mpi(&T, &ctx->N) >= 0) { ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA; goto cleanup; } olen = ctx->len; - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, &ctx->E, &ctx->N, &ctx->RN ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &T, output, olen ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&T, &T, &ctx->E, &ctx->N, &ctx->RN)); + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&T, output, olen)); cleanup: #if defined(MBEDTLS_THREADING_C) - if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 ) - return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); + if (mbedtls_mutex_unlock(&ctx->mutex) != 0) { + return MBEDTLS_ERR_THREADING_MUTEX_ERROR; + } #endif - mbedtls_mpi_free( &T ); + mbedtls_mpi_free(&T); - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_PUBLIC_FAILED, ret ) ); + if (ret != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_PUBLIC_FAILED, ret); + } - return( 0 ); + return 0; } /* @@ -760,63 +758,62 @@ cleanup: * DSS, and other systems. In : Advances in Cryptology-CRYPTO'96. Springer * Berlin Heidelberg, 1996. p. 104-113. */ -static int rsa_prepare_blinding( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) +static int rsa_prepare_blinding(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) { int ret, count = 0; mbedtls_mpi R; - mbedtls_mpi_init( &R ); + mbedtls_mpi_init(&R); - if( ctx->Vf.p != NULL ) - { + if (ctx->Vf.p != NULL) { /* We already have blinding values, just update them by squaring */ - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vi, &ctx->Vi ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vf, &ctx->Vf, &ctx->Vf ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vf, &ctx->Vf, &ctx->N ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&ctx->Vi, &ctx->Vi, &ctx->Vi)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&ctx->Vi, &ctx->Vi, &ctx->N)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&ctx->Vf, &ctx->Vf, &ctx->Vf)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&ctx->Vf, &ctx->Vf, &ctx->N)); goto cleanup; } /* Unblinding value: Vf = random number, invertible mod N */ do { - if( count++ > 10 ) - { + if (count++ > 10) { ret = MBEDTLS_ERR_RSA_RNG_FAILED; goto cleanup; } - MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &ctx->Vf, ctx->len - 1, f_rng, p_rng ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_fill_random(&ctx->Vf, ctx->len - 1, f_rng, p_rng)); /* Compute Vf^-1 as R * (R Vf)^-1 to avoid leaks from inv_mod. */ - MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, ctx->len - 1, f_rng, p_rng ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vf, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_fill_random(&R, ctx->len - 1, f_rng, p_rng)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&ctx->Vi, &ctx->Vf, &R)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&ctx->Vi, &ctx->Vi, &ctx->N)); /* At this point, Vi is invertible mod N if and only if both Vf and R * are invertible mod N. If one of them isn't, we don't need to know * which one, we just loop and choose new values for both of them. * (Each iteration succeeds with overwhelming probability.) */ - ret = mbedtls_mpi_inv_mod( &ctx->Vi, &ctx->Vi, &ctx->N ); - if( ret != 0 && ret != MBEDTLS_ERR_MPI_NOT_ACCEPTABLE ) + ret = mbedtls_mpi_inv_mod(&ctx->Vi, &ctx->Vi, &ctx->N); + if (ret != 0 && ret != MBEDTLS_ERR_MPI_NOT_ACCEPTABLE) { goto cleanup; + } - } while( ret == MBEDTLS_ERR_MPI_NOT_ACCEPTABLE ); + } while (ret == MBEDTLS_ERR_MPI_NOT_ACCEPTABLE); /* Finish the computation of Vf^-1 = R * (R Vf)^-1 */ - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vi, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&ctx->Vi, &ctx->Vi, &R)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&ctx->Vi, &ctx->Vi, &ctx->N)); /* Blinding value: Vi = Vf^(-e) mod N * (Vi already contains Vf^-1 at this point) */ - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &ctx->Vi, &ctx->Vi, &ctx->E, &ctx->N, &ctx->RN ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&ctx->Vi, &ctx->Vi, &ctx->E, &ctx->N, &ctx->RN)); cleanup: - mbedtls_mpi_free( &R ); + mbedtls_mpi_free(&R); - return( ret ); + return ret; } /* @@ -843,11 +840,11 @@ cleanup: /* * Do an RSA private key operation */ -int mbedtls_rsa_private( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - const unsigned char *input, - unsigned char *output ) +int mbedtls_rsa_private(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + const unsigned char *input, + unsigned char *output) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t olen; @@ -884,110 +881,107 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx, * checked result; should be the same in the end. */ mbedtls_mpi I, C; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( input != NULL ); - RSA_VALIDATE_RET( output != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(input != NULL); + RSA_VALIDATE_RET(output != NULL); - if( rsa_check_context( ctx, 1 /* private key checks */, - f_rng != NULL /* blinding y/n */ ) != 0 ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (rsa_check_context(ctx, 1 /* private key checks */, + f_rng != NULL /* blinding y/n */) != 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } #if defined(MBEDTLS_THREADING_C) - if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) { + return ret; + } #endif /* MPI Initialization */ - mbedtls_mpi_init( &T ); + mbedtls_mpi_init(&T); - mbedtls_mpi_init( &P1 ); - mbedtls_mpi_init( &Q1 ); - mbedtls_mpi_init( &R ); + mbedtls_mpi_init(&P1); + mbedtls_mpi_init(&Q1); + mbedtls_mpi_init(&R); - if( f_rng != NULL ) - { + if (f_rng != NULL) { #if defined(MBEDTLS_RSA_NO_CRT) - mbedtls_mpi_init( &D_blind ); + mbedtls_mpi_init(&D_blind); #else - mbedtls_mpi_init( &DP_blind ); - mbedtls_mpi_init( &DQ_blind ); + mbedtls_mpi_init(&DP_blind); + mbedtls_mpi_init(&DQ_blind); #endif } #if !defined(MBEDTLS_RSA_NO_CRT) - mbedtls_mpi_init( &TP ); mbedtls_mpi_init( &TQ ); + mbedtls_mpi_init(&TP); mbedtls_mpi_init(&TQ); #endif - mbedtls_mpi_init( &I ); - mbedtls_mpi_init( &C ); + mbedtls_mpi_init(&I); + mbedtls_mpi_init(&C); /* End of MPI initialization */ - MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &T, input, ctx->len ) ); - if( mbedtls_mpi_cmp_mpi( &T, &ctx->N ) >= 0 ) - { + MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&T, input, ctx->len)); + if (mbedtls_mpi_cmp_mpi(&T, &ctx->N) >= 0) { ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA; goto cleanup; } - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &I, &T ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&I, &T)); - if( f_rng != NULL ) - { + if (f_rng != NULL) { /* * Blinding * T = T * Vi mod N */ - MBEDTLS_MPI_CHK( rsa_prepare_blinding( ctx, f_rng, p_rng ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T, &T, &ctx->Vi ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T, &ctx->N ) ); + MBEDTLS_MPI_CHK(rsa_prepare_blinding(ctx, f_rng, p_rng)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&T, &T, &ctx->Vi)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&T, &T, &ctx->N)); /* * Exponent blinding */ - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &P1, &ctx->P, 1 ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &Q1, &ctx->Q, 1 ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&P1, &ctx->P, 1)); + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&Q1, &ctx->Q, 1)); #if defined(MBEDTLS_RSA_NO_CRT) /* * D_blind = ( P - 1 ) * ( Q - 1 ) * R + D */ - MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING, - f_rng, p_rng ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &D_blind, &P1, &Q1 ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &D_blind, &D_blind, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &D_blind, &D_blind, &ctx->D ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_fill_random(&R, RSA_EXPONENT_BLINDING, + f_rng, p_rng)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&D_blind, &P1, &Q1)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&D_blind, &D_blind, &R)); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_mpi(&D_blind, &D_blind, &ctx->D)); D = &D_blind; #else /* * DP_blind = ( P - 1 ) * R + DP */ - MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING, - f_rng, p_rng ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &DP_blind, &P1, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &DP_blind, &DP_blind, - &ctx->DP ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_fill_random(&R, RSA_EXPONENT_BLINDING, + f_rng, p_rng)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&DP_blind, &P1, &R)); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_mpi(&DP_blind, &DP_blind, + &ctx->DP)); DP = &DP_blind; /* * DQ_blind = ( Q - 1 ) * R + DQ */ - MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING, - f_rng, p_rng ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &DQ_blind, &Q1, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &DQ_blind, &DQ_blind, - &ctx->DQ ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_fill_random(&R, RSA_EXPONENT_BLINDING, + f_rng, p_rng)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&DQ_blind, &Q1, &R)); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_mpi(&DQ_blind, &DQ_blind, + &ctx->DQ)); DQ = &DQ_blind; #endif /* MBEDTLS_RSA_NO_CRT */ } #if defined(MBEDTLS_RSA_NO_CRT) - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, D, &ctx->N, &ctx->RN ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&T, &T, D, &ctx->N, &ctx->RN)); #else /* * Faster decryption using the CRT @@ -996,78 +990,77 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx, * TQ = input ^ dQ mod Q */ - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &TP, &T, DP, &ctx->P, &ctx->RP ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &TQ, &T, DQ, &ctx->Q, &ctx->RQ ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&TP, &T, DP, &ctx->P, &ctx->RP)); + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&TQ, &T, DQ, &ctx->Q, &ctx->RQ)); /* * T = (TP - TQ) * (Q^-1 mod P) mod P */ - MBEDTLS_MPI_CHK( mbedtls_mpi_sub_mpi( &T, &TP, &TQ ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &TP, &T, &ctx->QP ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &TP, &ctx->P ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_sub_mpi(&T, &TP, &TQ)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&TP, &T, &ctx->QP)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&T, &TP, &ctx->P)); /* * T = TQ + T * Q */ - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &TP, &T, &ctx->Q ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &T, &TQ, &TP ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&TP, &T, &ctx->Q)); + MBEDTLS_MPI_CHK(mbedtls_mpi_add_mpi(&T, &TQ, &TP)); #endif /* MBEDTLS_RSA_NO_CRT */ - if( f_rng != NULL ) - { + if (f_rng != NULL) { /* * Unblind * T = T * Vf mod N */ - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T, &T, &ctx->Vf ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T, &ctx->N ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_mul_mpi(&T, &T, &ctx->Vf)); + MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&T, &T, &ctx->N)); } /* Verify the result to prevent glitching attacks. */ - MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &C, &T, &ctx->E, - &ctx->N, &ctx->RN ) ); - if( mbedtls_mpi_cmp_mpi( &C, &I ) != 0 ) - { + MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&C, &T, &ctx->E, + &ctx->N, &ctx->RN)); + if (mbedtls_mpi_cmp_mpi(&C, &I) != 0) { ret = MBEDTLS_ERR_RSA_VERIFY_FAILED; goto cleanup; } olen = ctx->len; - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &T, output, olen ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&T, output, olen)); cleanup: #if defined(MBEDTLS_THREADING_C) - if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 ) - return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); + if (mbedtls_mutex_unlock(&ctx->mutex) != 0) { + return MBEDTLS_ERR_THREADING_MUTEX_ERROR; + } #endif - mbedtls_mpi_free( &P1 ); - mbedtls_mpi_free( &Q1 ); - mbedtls_mpi_free( &R ); + mbedtls_mpi_free(&P1); + mbedtls_mpi_free(&Q1); + mbedtls_mpi_free(&R); - if( f_rng != NULL ) - { + if (f_rng != NULL) { #if defined(MBEDTLS_RSA_NO_CRT) - mbedtls_mpi_free( &D_blind ); + mbedtls_mpi_free(&D_blind); #else - mbedtls_mpi_free( &DP_blind ); - mbedtls_mpi_free( &DQ_blind ); + mbedtls_mpi_free(&DP_blind); + mbedtls_mpi_free(&DQ_blind); #endif } - mbedtls_mpi_free( &T ); + mbedtls_mpi_free(&T); #if !defined(MBEDTLS_RSA_NO_CRT) - mbedtls_mpi_free( &TP ); mbedtls_mpi_free( &TQ ); + mbedtls_mpi_free(&TP); mbedtls_mpi_free(&TQ); #endif - mbedtls_mpi_free( &C ); - mbedtls_mpi_free( &I ); + mbedtls_mpi_free(&C); + mbedtls_mpi_free(&I); - if( ret != 0 && ret >= -0x007f ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_PRIVATE_FAILED, ret ) ); + if (ret != 0 && ret >= -0x007f) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_PRIVATE_FAILED, ret); + } - return( ret ); + return ret; } #if defined(MBEDTLS_PKCS1_V21) @@ -1080,8 +1073,8 @@ cleanup: * \param slen length of the source buffer * \param md_ctx message digest context to use */ -static int mgf_mask( unsigned char *dst, size_t dlen, unsigned char *src, - size_t slen, mbedtls_md_context_t *md_ctx ) +static int mgf_mask(unsigned char *dst, size_t dlen, unsigned char *src, + size_t slen, mbedtls_md_context_t *md_ctx) { unsigned char mask[MBEDTLS_MD_MAX_SIZE]; unsigned char counter[4]; @@ -1090,31 +1083,36 @@ static int mgf_mask( unsigned char *dst, size_t dlen, unsigned char *src, size_t i, use_len; int ret = 0; - memset( mask, 0, MBEDTLS_MD_MAX_SIZE ); - memset( counter, 0, 4 ); + memset(mask, 0, MBEDTLS_MD_MAX_SIZE); + memset(counter, 0, 4); - hlen = mbedtls_md_get_size( md_ctx->md_info ); + hlen = mbedtls_md_get_size(md_ctx->md_info); /* Generate and apply dbMask */ p = dst; - while( dlen > 0 ) - { + while (dlen > 0) { use_len = hlen; - if( dlen < hlen ) + if (dlen < hlen) { use_len = dlen; + } - if( ( ret = mbedtls_md_starts( md_ctx ) ) != 0 ) + if ((ret = mbedtls_md_starts(md_ctx)) != 0) { goto exit; - if( ( ret = mbedtls_md_update( md_ctx, src, slen ) ) != 0 ) + } + if ((ret = mbedtls_md_update(md_ctx, src, slen)) != 0) { goto exit; - if( ( ret = mbedtls_md_update( md_ctx, counter, 4 ) ) != 0 ) + } + if ((ret = mbedtls_md_update(md_ctx, counter, 4)) != 0) { goto exit; - if( ( ret = mbedtls_md_finish( md_ctx, mask ) ) != 0 ) + } + if ((ret = mbedtls_md_finish(md_ctx, mask)) != 0) { goto exit; + } - for( i = 0; i < use_len; ++i ) + for (i = 0; i < use_len; ++i) { *p++ ^= mask[i]; + } counter[3]++; @@ -1122,9 +1120,9 @@ static int mgf_mask( unsigned char *dst, size_t dlen, unsigned char *src, } exit: - mbedtls_platform_zeroize( mask, sizeof( mask ) ); + mbedtls_platform_zeroize(mask, sizeof(mask)); - return( ret ); + return ret; } #endif /* MBEDTLS_PKCS1_V21 */ @@ -1132,14 +1130,14 @@ exit: /* * Implementation of the PKCS#1 v2.1 RSAES-OAEP-ENCRYPT function */ -int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - const unsigned char *label, size_t label_len, - size_t ilen, - const unsigned char *input, - unsigned char *output ) +int mbedtls_rsa_rsaes_oaep_encrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + const unsigned char *label, size_t label_len, + size_t ilen, + const unsigned char *input, + unsigned char *output) { size_t olen; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; @@ -1148,72 +1146,83 @@ int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx, const mbedtls_md_info_t *md_info; mbedtls_md_context_t md_ctx; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output != NULL ); - RSA_VALIDATE_RET( ilen == 0 || input != NULL ); - RSA_VALIDATE_RET( label_len == 0 || label != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output != NULL); + RSA_VALIDATE_RET(ilen == 0 || input != NULL); + RSA_VALIDATE_RET(label_len == 0 || label != NULL); - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - if( f_rng == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (f_rng == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type((mbedtls_md_type_t) ctx->hash_id); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } olen = ctx->len; - hlen = mbedtls_md_get_size( md_info ); + hlen = mbedtls_md_get_size(md_info); /* first comparison checks for overflow */ - if( ilen + 2 * hlen + 2 < ilen || olen < ilen + 2 * hlen + 2 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (ilen + 2 * hlen + 2 < ilen || olen < ilen + 2 * hlen + 2) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - memset( output, 0, olen ); + memset(output, 0, olen); *p++ = 0; /* Generate a random octet string seed */ - if( ( ret = f_rng( p_rng, p, hlen ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_RNG_FAILED, ret ) ); + if ((ret = f_rng(p_rng, p, hlen)) != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_RNG_FAILED, ret); + } p += hlen; /* Construct DB */ - if( ( ret = mbedtls_md( md_info, label, label_len, p ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_md(md_info, label, label_len, p)) != 0) { + return ret; + } p += hlen; p += olen - 2 * hlen - 2 - ilen; *p++ = 1; - if( ilen != 0 ) - memcpy( p, input, ilen ); + if (ilen != 0) { + memcpy(p, input, ilen); + } - mbedtls_md_init( &md_ctx ); - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 ) + mbedtls_md_init(&md_ctx); + if ((ret = mbedtls_md_setup(&md_ctx, md_info, 0)) != 0) { goto exit; + } /* maskedDB: Apply dbMask to DB */ - if( ( ret = mgf_mask( output + hlen + 1, olen - hlen - 1, output + 1, hlen, - &md_ctx ) ) != 0 ) + if ((ret = mgf_mask(output + hlen + 1, olen - hlen - 1, output + 1, hlen, + &md_ctx)) != 0) { goto exit; + } /* maskedSeed: Apply seedMask to seed */ - if( ( ret = mgf_mask( output + 1, hlen, output + hlen + 1, olen - hlen - 1, - &md_ctx ) ) != 0 ) + if ((ret = mgf_mask(output + 1, hlen, output + hlen + 1, olen - hlen - 1, + &md_ctx)) != 0) { goto exit; + } exit: - mbedtls_md_free( &md_ctx ); + mbedtls_md_free(&md_ctx); - if( ret != 0 ) - return( ret ); + if (ret != 0) { + return ret; + } - return( ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, output, output ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, output, output ) ); + return (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, output, output) + : mbedtls_rsa_private(ctx, f_rng, p_rng, output, output); } #endif /* MBEDTLS_PKCS1_V21 */ @@ -1221,107 +1230,108 @@ exit: /* * Implementation of the PKCS#1 v2.1 RSAES-PKCS1-V1_5-ENCRYPT function */ -int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, size_t ilen, - const unsigned char *input, - unsigned char *output ) +int mbedtls_rsa_rsaes_pkcs1_v15_encrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, size_t ilen, + const unsigned char *input, + unsigned char *output) { size_t nb_pad, olen; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; unsigned char *p = output; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output != NULL ); - RSA_VALIDATE_RET( ilen == 0 || input != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output != NULL); + RSA_VALIDATE_RET(ilen == 0 || input != NULL); - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } olen = ctx->len; /* first comparison checks for overflow */ - if( ilen + 11 < ilen || olen < ilen + 11 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (ilen + 11 < ilen || olen < ilen + 11) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } nb_pad = olen - 3 - ilen; *p++ = 0; - if( mode == MBEDTLS_RSA_PUBLIC ) - { - if( f_rng == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PUBLIC) { + if (f_rng == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } *p++ = MBEDTLS_RSA_CRYPT; - while( nb_pad-- > 0 ) - { + while (nb_pad-- > 0) { int rng_dl = 100; do { - ret = f_rng( p_rng, p, 1 ); - } while( *p == 0 && --rng_dl && ret == 0 ); + ret = f_rng(p_rng, p, 1); + } while (*p == 0 && --rng_dl && ret == 0); /* Check if RNG failed to generate data */ - if( rng_dl == 0 || ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_RNG_FAILED, ret ) ); + if (rng_dl == 0 || ret != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_RNG_FAILED, ret); + } p++; } - } - else - { + } else { *p++ = MBEDTLS_RSA_SIGN; - while( nb_pad-- > 0 ) + while (nb_pad-- > 0) { *p++ = 0xFF; + } } *p++ = 0; - if( ilen != 0 ) - memcpy( p, input, ilen ); + if (ilen != 0) { + memcpy(p, input, ilen); + } - return( ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, output, output ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, output, output ) ); + return (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, output, output) + : mbedtls_rsa_private(ctx, f_rng, p_rng, output, output); } #endif /* MBEDTLS_PKCS1_V15 */ /* * Add the message padding, then do an RSA operation */ -int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, size_t ilen, - const unsigned char *input, - unsigned char *output ) +int mbedtls_rsa_pkcs1_encrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, size_t ilen, + const unsigned char *input, + unsigned char *output) { - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output != NULL ); - RSA_VALIDATE_RET( ilen == 0 || input != NULL ); - - switch( ctx->padding ) - { + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output != NULL); + RSA_VALIDATE_RET(ilen == 0 || input != NULL); + + switch (ctx->padding) { #if defined(MBEDTLS_PKCS1_V15) case MBEDTLS_RSA_PKCS_V15: - return mbedtls_rsa_rsaes_pkcs1_v15_encrypt( ctx, f_rng, p_rng, mode, ilen, - input, output ); + return mbedtls_rsa_rsaes_pkcs1_v15_encrypt(ctx, f_rng, p_rng, mode, ilen, + input, output); #endif #if defined(MBEDTLS_PKCS1_V21) case MBEDTLS_RSA_PKCS_V21: - return mbedtls_rsa_rsaes_oaep_encrypt( ctx, f_rng, p_rng, mode, NULL, 0, - ilen, input, output ); + return mbedtls_rsa_rsaes_oaep_encrypt(ctx, f_rng, p_rng, mode, NULL, 0, + ilen, input, output); #endif default: - return( MBEDTLS_ERR_RSA_INVALID_PADDING ); + return MBEDTLS_ERR_RSA_INVALID_PADDING; } } @@ -1329,15 +1339,15 @@ int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx, /* * Implementation of the PKCS#1 v2.1 RSAES-OAEP-DECRYPT function */ -int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - const unsigned char *label, size_t label_len, - size_t *olen, - const unsigned char *input, - unsigned char *output, - size_t output_max_len ) +int mbedtls_rsa_rsaes_oaep_decrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + const unsigned char *label, size_t label_len, + size_t *olen, + const unsigned char *input, + unsigned char *output, + size_t output_max_len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t ilen, i, pad_len; @@ -1348,71 +1358,75 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx, const mbedtls_md_info_t *md_info; mbedtls_md_context_t md_ctx; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output_max_len == 0 || output != NULL ); - RSA_VALIDATE_RET( label_len == 0 || label != NULL ); - RSA_VALIDATE_RET( input != NULL ); - RSA_VALIDATE_RET( olen != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output_max_len == 0 || output != NULL); + RSA_VALIDATE_RET(label_len == 0 || label != NULL); + RSA_VALIDATE_RET(input != NULL); + RSA_VALIDATE_RET(olen != NULL); /* * Parameters sanity checks */ - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } ilen = ctx->len; - if( ilen < 16 || ilen > sizeof( buf ) ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (ilen < 16 || ilen > sizeof(buf)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type((mbedtls_md_type_t) ctx->hash_id); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hlen = mbedtls_md_get_size( md_info ); + hlen = mbedtls_md_get_size(md_info); // checking for integer underflow - if( 2 * hlen + 2 > ilen ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (2 * hlen + 2 > ilen) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* * RSA operation */ - ret = ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, input, buf ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf ); + ret = (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, input, buf) + : mbedtls_rsa_private(ctx, f_rng, p_rng, input, buf); - if( ret != 0 ) + if (ret != 0) { goto cleanup; + } /* * Unmask data and generate lHash */ - mbedtls_md_init( &md_ctx ); - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 ) - { - mbedtls_md_free( &md_ctx ); + mbedtls_md_init(&md_ctx); + if ((ret = mbedtls_md_setup(&md_ctx, md_info, 0)) != 0) { + mbedtls_md_free(&md_ctx); goto cleanup; } /* seed: Apply seedMask to maskedSeed */ - if( ( ret = mgf_mask( buf + 1, hlen, buf + hlen + 1, ilen - hlen - 1, - &md_ctx ) ) != 0 || - /* DB: Apply dbMask to maskedDB */ - ( ret = mgf_mask( buf + hlen + 1, ilen - hlen - 1, buf + 1, hlen, - &md_ctx ) ) != 0 ) - { - mbedtls_md_free( &md_ctx ); + if ((ret = mgf_mask(buf + 1, hlen, buf + hlen + 1, ilen - hlen - 1, + &md_ctx)) != 0 || + /* DB: Apply dbMask to maskedDB */ + (ret = mgf_mask(buf + hlen + 1, ilen - hlen - 1, buf + 1, hlen, + &md_ctx)) != 0) { + mbedtls_md_free(&md_ctx); goto cleanup; } - mbedtls_md_free( &md_ctx ); + mbedtls_md_free(&md_ctx); /* Generate lHash */ - if( ( ret = mbedtls_md( md_info, label, label_len, lhash ) ) != 0 ) + if ((ret = mbedtls_md(md_info, label, label_len, lhash)) != 0) { goto cleanup; + } /* * Check contents, in "constant-time" @@ -1425,17 +1439,17 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx, p += hlen; /* Skip seed */ /* Check lHash */ - for( i = 0; i < hlen; i++ ) + for (i = 0; i < hlen; i++) { bad |= lhash[i] ^ *p++; + } /* Get zero-padding len, but always read till end of buffer * (minus one, for the 01 byte) */ pad_len = 0; pad_done = 0; - for( i = 0; i < ilen - 2 * hlen - 2; i++ ) - { + for (i = 0; i < ilen - 2 * hlen - 2; i++) { pad_done |= p[i]; - pad_len += ((pad_done | (unsigned char)-pad_done) >> 7) ^ 1; + pad_len += ((pad_done | (unsigned char) -pad_done) >> 7) ^ 1; } p += pad_len; @@ -1447,28 +1461,27 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx, * recommendations in PKCS#1 v2.2: an opponent cannot distinguish between * the different error conditions. */ - if( bad != 0 ) - { + if (bad != 0) { ret = MBEDTLS_ERR_RSA_INVALID_PADDING; goto cleanup; } - if( ilen - ( p - buf ) > output_max_len ) - { + if (ilen - (p - buf) > output_max_len) { ret = MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; goto cleanup; } *olen = ilen - (p - buf); - if( *olen != 0 ) - memcpy( output, p, *olen ); + if (*olen != 0) { + memcpy(output, p, *olen); + } ret = 0; cleanup: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); - mbedtls_platform_zeroize( lhash, sizeof( lhash ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); + mbedtls_platform_zeroize(lhash, sizeof(lhash)); - return( ret ); + return ret; } #endif /* MBEDTLS_PKCS1_V21 */ @@ -1476,99 +1489,101 @@ cleanup: /* * Implementation of the PKCS#1 v2.1 RSAES-PKCS1-V1_5-DECRYPT function */ -int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - size_t *olen, - const unsigned char *input, - unsigned char *output, - size_t output_max_len ) +int mbedtls_rsa_rsaes_pkcs1_v15_decrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + size_t *olen, + const unsigned char *input, + unsigned char *output, + size_t output_max_len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t ilen; unsigned char buf[MBEDTLS_MPI_MAX_SIZE]; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output_max_len == 0 || output != NULL ); - RSA_VALIDATE_RET( input != NULL ); - RSA_VALIDATE_RET( olen != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output_max_len == 0 || output != NULL); + RSA_VALIDATE_RET(input != NULL); + RSA_VALIDATE_RET(olen != NULL); ilen = ctx->len; - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - if( ilen < 16 || ilen > sizeof( buf ) ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (ilen < 16 || ilen > sizeof(buf)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - ret = ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, input, buf ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf ); + ret = (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, input, buf) + : mbedtls_rsa_private(ctx, f_rng, p_rng, input, buf); - if( ret != 0 ) + if (ret != 0) { goto cleanup; + } - ret = mbedtls_ct_rsaes_pkcs1_v15_unpadding( mode, buf, ilen, - output, output_max_len, olen ); + ret = mbedtls_ct_rsaes_pkcs1_v15_unpadding(mode, buf, ilen, + output, output_max_len, olen); cleanup: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); - return( ret ); + return ret; } #endif /* MBEDTLS_PKCS1_V15 */ /* * Do an RSA operation, then remove the message padding */ -int mbedtls_rsa_pkcs1_decrypt( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, size_t *olen, - const unsigned char *input, - unsigned char *output, - size_t output_max_len) +int mbedtls_rsa_pkcs1_decrypt(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, size_t *olen, + const unsigned char *input, + unsigned char *output, + size_t output_max_len) { - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( output_max_len == 0 || output != NULL ); - RSA_VALIDATE_RET( input != NULL ); - RSA_VALIDATE_RET( olen != NULL ); - - switch( ctx->padding ) - { + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(output_max_len == 0 || output != NULL); + RSA_VALIDATE_RET(input != NULL); + RSA_VALIDATE_RET(olen != NULL); + + switch (ctx->padding) { #if defined(MBEDTLS_PKCS1_V15) case MBEDTLS_RSA_PKCS_V15: - return mbedtls_rsa_rsaes_pkcs1_v15_decrypt( ctx, f_rng, p_rng, mode, olen, - input, output, output_max_len ); + return mbedtls_rsa_rsaes_pkcs1_v15_decrypt(ctx, f_rng, p_rng, mode, olen, + input, output, output_max_len); #endif #if defined(MBEDTLS_PKCS1_V21) case MBEDTLS_RSA_PKCS_V21: - return mbedtls_rsa_rsaes_oaep_decrypt( ctx, f_rng, p_rng, mode, NULL, 0, - olen, input, output, - output_max_len ); + return mbedtls_rsa_rsaes_oaep_decrypt(ctx, f_rng, p_rng, mode, NULL, 0, + olen, input, output, + output_max_len); #endif default: - return( MBEDTLS_ERR_RSA_INVALID_PADDING ); + return MBEDTLS_ERR_RSA_INVALID_PADDING; } } #if defined(MBEDTLS_PKCS1_V21) -static int rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - int saltlen, - unsigned char *sig ) +static int rsa_rsassa_pss_sign(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + int saltlen, + unsigned char *sig) { size_t olen; unsigned char *p = sig; @@ -1578,152 +1593,161 @@ static int rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx, size_t msb; const mbedtls_md_info_t *md_info; mbedtls_md_context_t md_ctx; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); - RSA_VALIDATE_RET( sig != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); + RSA_VALIDATE_RET(sig != NULL); - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - if( f_rng == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (f_rng == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } olen = ctx->len; - if( md_alg != MBEDTLS_MD_NONE ) - { + if (md_alg != MBEDTLS_MD_NONE) { /* Gather length of hash to sign */ - md_info = mbedtls_md_info_from_type( md_alg ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type(md_alg); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hashlen = mbedtls_md_get_size( md_info ); + hashlen = mbedtls_md_get_size(md_info); } - md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type((mbedtls_md_type_t) ctx->hash_id); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hlen = mbedtls_md_get_size( md_info ); + hlen = mbedtls_md_get_size(md_info); - if (saltlen == MBEDTLS_RSA_SALT_LEN_ANY) - { - /* Calculate the largest possible salt length, up to the hash size. - * Normally this is the hash length, which is the maximum salt length - * according to FIPS 185-4 §5.5 (e) and common practice. If there is not - * enough room, use the maximum salt length that fits. The constraint is - * that the hash length plus the salt length plus 2 bytes must be at most - * the key length. This complies with FIPS 186-4 §5.5 (e) and RFC 8017 - * (PKCS#1 v2.2) §9.1.1 step 3. */ + if (saltlen == MBEDTLS_RSA_SALT_LEN_ANY) { + /* Calculate the largest possible salt length, up to the hash size. + * Normally this is the hash length, which is the maximum salt length + * according to FIPS 185-4 §5.5 (e) and common practice. If there is not + * enough room, use the maximum salt length that fits. The constraint is + * that the hash length plus the salt length plus 2 bytes must be at most + * the key length. This complies with FIPS 186-4 §5.5 (e) and RFC 8017 + * (PKCS#1 v2.2) §9.1.1 step 3. */ min_slen = hlen - 2; - if( olen < hlen + min_slen + 2 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); - else if( olen >= hlen + hlen + 2 ) + if (olen < hlen + min_slen + 2) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } else if (olen >= hlen + hlen + 2) { slen = hlen; - else + } else { slen = olen - hlen - 2; - } - else if ( (saltlen < 0) || (saltlen + hlen + 2 > olen) ) - { - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); - } - else - { + } + } else if ((saltlen < 0) || (saltlen + hlen + 2 > olen)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } else { slen = (size_t) saltlen; } - memset( sig, 0, olen ); + memset(sig, 0, olen); /* Note: EMSA-PSS encoding is over the length of N - 1 bits */ - msb = mbedtls_mpi_bitlen( &ctx->N ) - 1; + msb = mbedtls_mpi_bitlen(&ctx->N) - 1; p += olen - hlen - slen - 2; *p++ = 0x01; /* Generate salt of length slen in place in the encoded message */ salt = p; - if( ( ret = f_rng( p_rng, salt, slen ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_RSA_RNG_FAILED, ret ) ); + if ((ret = f_rng(p_rng, salt, slen)) != 0) { + return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_RSA_RNG_FAILED, ret); + } p += slen; - mbedtls_md_init( &md_ctx ); - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 ) + mbedtls_md_init(&md_ctx); + if ((ret = mbedtls_md_setup(&md_ctx, md_info, 0)) != 0) { goto exit; + } /* Generate H = Hash( M' ) */ - if( ( ret = mbedtls_md_starts( &md_ctx ) ) != 0 ) + if ((ret = mbedtls_md_starts(&md_ctx)) != 0) { goto exit; - if( ( ret = mbedtls_md_update( &md_ctx, p, 8 ) ) != 0 ) + } + if ((ret = mbedtls_md_update(&md_ctx, p, 8)) != 0) { goto exit; - if( ( ret = mbedtls_md_update( &md_ctx, hash, hashlen ) ) != 0 ) + } + if ((ret = mbedtls_md_update(&md_ctx, hash, hashlen)) != 0) { goto exit; - if( ( ret = mbedtls_md_update( &md_ctx, salt, slen ) ) != 0 ) + } + if ((ret = mbedtls_md_update(&md_ctx, salt, slen)) != 0) { goto exit; - if( ( ret = mbedtls_md_finish( &md_ctx, p ) ) != 0 ) + } + if ((ret = mbedtls_md_finish(&md_ctx, p)) != 0) { goto exit; + } /* Compensate for boundary condition when applying mask */ - if( msb % 8 == 0 ) + if (msb % 8 == 0) { offset = 1; + } /* maskedDB: Apply dbMask to DB */ - if( ( ret = mgf_mask( sig + offset, olen - hlen - 1 - offset, p, hlen, - &md_ctx ) ) != 0 ) + if ((ret = mgf_mask(sig + offset, olen - hlen - 1 - offset, p, hlen, + &md_ctx)) != 0) { goto exit; + } - msb = mbedtls_mpi_bitlen( &ctx->N ) - 1; - sig[0] &= 0xFF >> ( olen * 8 - msb ); + msb = mbedtls_mpi_bitlen(&ctx->N) - 1; + sig[0] &= 0xFF >> (olen * 8 - msb); p += hlen; *p++ = 0xBC; exit: - mbedtls_md_free( &md_ctx ); + mbedtls_md_free(&md_ctx); - if( ret != 0 ) - return( ret ); + if (ret != 0) { + return ret; + } - return( ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, sig, sig ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, sig, sig ) ); + return (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, sig, sig) + : mbedtls_rsa_private(ctx, f_rng, p_rng, sig, sig); } /* * Implementation of the PKCS#1 v2.1 RSASSA-PSS-SIGN function with * the option to pass in the salt length. */ -int mbedtls_rsa_rsassa_pss_sign_ext( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - int saltlen, - unsigned char *sig ) +int mbedtls_rsa_rsassa_pss_sign_ext(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + int saltlen, + unsigned char *sig) { - return rsa_rsassa_pss_sign( ctx, f_rng, p_rng, MBEDTLS_RSA_PRIVATE, md_alg, - hashlen, hash, saltlen, sig ); + return rsa_rsassa_pss_sign(ctx, f_rng, p_rng, MBEDTLS_RSA_PRIVATE, md_alg, + hashlen, hash, saltlen, sig); } /* * Implementation of the PKCS#1 v2.1 RSASSA-PSS-SIGN function */ -int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - unsigned char *sig ) +int mbedtls_rsa_rsassa_pss_sign(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + unsigned char *sig) { - return rsa_rsassa_pss_sign( ctx, f_rng, p_rng, mode, md_alg, - hashlen, hash, MBEDTLS_RSA_SALT_LEN_ANY, sig ); + return rsa_rsassa_pss_sign(ctx, f_rng, p_rng, mode, md_alg, + hashlen, hash, MBEDTLS_RSA_SALT_LEN_ANY, sig); } #endif /* MBEDTLS_PKCS1_V21 */ @@ -1750,11 +1774,11 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx, * - dst points to a buffer of size at least dst_len. * */ -static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - size_t dst_len, - unsigned char *dst ) +static int rsa_rsassa_pkcs1_v15_encode(mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + size_t dst_len, + unsigned char *dst) { size_t oid_size = 0; size_t nb_pad = dst_len; @@ -1762,23 +1786,25 @@ static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg, const char *oid = NULL; /* Are we signing hashed or raw data? */ - if( md_alg != MBEDTLS_MD_NONE ) - { - const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (md_alg != MBEDTLS_MD_NONE) { + const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_alg); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mbedtls_oid_get_oid_by_md(md_alg, &oid, &oid_size) != 0) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hashlen = mbedtls_md_get_size( md_info ); + hashlen = mbedtls_md_get_size(md_info); /* Double-check that 8 + hashlen + oid_size can be used as a * 1-byte ASN.1 length encoding and that there's no overflow. */ - if( 8 + hashlen + oid_size >= 0x80 || + if (8 + hashlen + oid_size >= 0x80 || 10 + hashlen < hashlen || - 10 + hashlen + oid_size < 10 + hashlen ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + 10 + hashlen + oid_size < 10 + hashlen) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* * Static bounds check: @@ -1788,22 +1814,23 @@ static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg, * - Need hashlen bytes for hash * - Need oid_size bytes for hash alg OID. */ - if( nb_pad < 10 + hashlen + oid_size ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (nb_pad < 10 + hashlen + oid_size) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } nb_pad -= 10 + hashlen + oid_size; - } - else - { - if( nb_pad < hashlen ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + } else { + if (nb_pad < hashlen) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } nb_pad -= hashlen; } /* Need space for signature header and padding delimiter (3 bytes), * and 8 bytes for the minimal padding */ - if( nb_pad < 3 + 8 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (nb_pad < 3 + 8) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } nb_pad -= 3; /* Now nb_pad is the amount of memory to be filled @@ -1812,15 +1839,14 @@ static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg, /* Write signature header and padding */ *p++ = 0; *p++ = MBEDTLS_RSA_SIGN; - memset( p, 0xFF, nb_pad ); + memset(p, 0xFF, nb_pad); p += nb_pad; *p++ = 0; /* Are we signing raw data? */ - if( md_alg == MBEDTLS_MD_NONE ) - { - memcpy( p, hash, hashlen ); - return( 0 ); + if (md_alg == MBEDTLS_MD_NONE) { + memcpy(p, hash, hashlen); + return 0; } /* Signing hashed data, add corresponding ASN.1 structure @@ -1837,73 +1863,73 @@ static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg, * TAG-OCTET + LEN [ HASH ] ] */ *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED; - *p++ = (unsigned char)( 0x08 + oid_size + hashlen ); + *p++ = (unsigned char) (0x08 + oid_size + hashlen); *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED; - *p++ = (unsigned char)( 0x04 + oid_size ); + *p++ = (unsigned char) (0x04 + oid_size); *p++ = MBEDTLS_ASN1_OID; *p++ = (unsigned char) oid_size; - memcpy( p, oid, oid_size ); + memcpy(p, oid, oid_size); p += oid_size; *p++ = MBEDTLS_ASN1_NULL; *p++ = 0x00; *p++ = MBEDTLS_ASN1_OCTET_STRING; *p++ = (unsigned char) hashlen; - memcpy( p, hash, hashlen ); + memcpy(p, hash, hashlen); p += hashlen; /* Just a sanity-check, should be automatic * after the initial bounds check. */ - if( p != dst + dst_len ) - { - mbedtls_platform_zeroize( dst, dst_len ); - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (p != dst + dst_len) { + mbedtls_platform_zeroize(dst, dst_len); + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; } - return( 0 ); + return 0; } /* * Do an RSA operation to sign the message digest */ -int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - unsigned char *sig ) +int mbedtls_rsa_rsassa_pkcs1_v15_sign(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + unsigned char *sig) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; unsigned char *sig_try = NULL, *verif = NULL; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); - RSA_VALIDATE_RET( sig != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); + RSA_VALIDATE_RET(sig != NULL); - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* * Prepare PKCS1-v1.5 encoding (padding and hash identifier) */ - if( ( ret = rsa_rsassa_pkcs1_v15_encode( md_alg, hashlen, hash, - ctx->len, sig ) ) != 0 ) - return( ret ); + if ((ret = rsa_rsassa_pkcs1_v15_encode(md_alg, hashlen, hash, + ctx->len, sig)) != 0) { + return ret; + } /* * Call respective RSA primitive */ - if( mode == MBEDTLS_RSA_PUBLIC ) - { + if (mode == MBEDTLS_RSA_PUBLIC) { /* Skip verification on a public key operation */ - return( mbedtls_rsa_public( ctx, sig, sig ) ); + return mbedtls_rsa_public(ctx, sig, sig); } /* Private key operation @@ -1912,76 +1938,75 @@ int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx, * temporary buffer and check it before returning it. */ - sig_try = mbedtls_calloc( 1, ctx->len ); - if( sig_try == NULL ) - return( MBEDTLS_ERR_MPI_ALLOC_FAILED ); + sig_try = mbedtls_calloc(1, ctx->len); + if (sig_try == NULL) { + return MBEDTLS_ERR_MPI_ALLOC_FAILED; + } - verif = mbedtls_calloc( 1, ctx->len ); - if( verif == NULL ) - { - mbedtls_free( sig_try ); - return( MBEDTLS_ERR_MPI_ALLOC_FAILED ); + verif = mbedtls_calloc(1, ctx->len); + if (verif == NULL) { + mbedtls_free(sig_try); + return MBEDTLS_ERR_MPI_ALLOC_FAILED; } - MBEDTLS_MPI_CHK( mbedtls_rsa_private( ctx, f_rng, p_rng, sig, sig_try ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_public( ctx, sig_try, verif ) ); + MBEDTLS_MPI_CHK(mbedtls_rsa_private(ctx, f_rng, p_rng, sig, sig_try)); + MBEDTLS_MPI_CHK(mbedtls_rsa_public(ctx, sig_try, verif)); - if( mbedtls_ct_memcmp( verif, sig, ctx->len ) != 0 ) - { + if (mbedtls_ct_memcmp(verif, sig, ctx->len) != 0) { ret = MBEDTLS_ERR_RSA_PRIVATE_FAILED; goto cleanup; } - memcpy( sig, sig_try, ctx->len ); + memcpy(sig, sig_try, ctx->len); cleanup: - mbedtls_platform_zeroize( sig_try, ctx->len ); - mbedtls_platform_zeroize( verif, ctx->len ); - mbedtls_free( sig_try ); - mbedtls_free( verif ); - - if( ret != 0 ) - memset( sig, '!', ctx->len ); - return( ret ); + mbedtls_platform_zeroize(sig_try, ctx->len); + mbedtls_platform_zeroize(verif, ctx->len); + mbedtls_free(sig_try); + mbedtls_free(verif); + + if (ret != 0) { + memset(sig, '!', ctx->len); + } + return ret; } #endif /* MBEDTLS_PKCS1_V15 */ /* * Do an RSA operation to sign the message digest */ -int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - unsigned char *sig ) +int mbedtls_rsa_pkcs1_sign(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + unsigned char *sig) { - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); - RSA_VALIDATE_RET( sig != NULL ); - - switch( ctx->padding ) - { + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); + RSA_VALIDATE_RET(sig != NULL); + + switch (ctx->padding) { #if defined(MBEDTLS_PKCS1_V15) case MBEDTLS_RSA_PKCS_V15: - return mbedtls_rsa_rsassa_pkcs1_v15_sign( ctx, f_rng, p_rng, mode, md_alg, - hashlen, hash, sig ); + return mbedtls_rsa_rsassa_pkcs1_v15_sign(ctx, f_rng, p_rng, mode, md_alg, + hashlen, hash, sig); #endif #if defined(MBEDTLS_PKCS1_V21) case MBEDTLS_RSA_PKCS_V21: - return mbedtls_rsa_rsassa_pss_sign( ctx, f_rng, p_rng, mode, md_alg, - hashlen, hash, sig ); + return mbedtls_rsa_rsassa_pss_sign(ctx, f_rng, p_rng, mode, md_alg, + hashlen, hash, sig); #endif default: - return( MBEDTLS_ERR_RSA_INVALID_PADDING ); + return MBEDTLS_ERR_RSA_INVALID_PADDING; } } @@ -1989,16 +2014,16 @@ int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx, /* * Implementation of the PKCS#1 v2.1 RSASSA-PSS-VERIFY function */ -int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - mbedtls_md_type_t mgf1_hash_id, - int expected_salt_len, - const unsigned char *sig ) +int mbedtls_rsa_rsassa_pss_verify_ext(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + mbedtls_md_type_t mgf1_hash_id, + int expected_salt_len, + const unsigned char *sig) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t siglen; @@ -2012,95 +2037,102 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx, mbedtls_md_context_t md_ctx; unsigned char buf[MBEDTLS_MPI_MAX_SIZE]; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( sig != NULL ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(sig != NULL); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } siglen = ctx->len; - if( siglen < 16 || siglen > sizeof( buf ) ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (siglen < 16 || siglen > sizeof(buf)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - ret = ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, sig, buf ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, sig, buf ); + ret = (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, sig, buf) + : mbedtls_rsa_private(ctx, f_rng, p_rng, sig, buf); - if( ret != 0 ) - return( ret ); + if (ret != 0) { + return ret; + } p = buf; - if( buf[siglen - 1] != 0xBC ) - return( MBEDTLS_ERR_RSA_INVALID_PADDING ); + if (buf[siglen - 1] != 0xBC) { + return MBEDTLS_ERR_RSA_INVALID_PADDING; + } - if( md_alg != MBEDTLS_MD_NONE ) - { + if (md_alg != MBEDTLS_MD_NONE) { /* Gather length of hash to sign */ - md_info = mbedtls_md_info_from_type( md_alg ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type(md_alg); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hashlen = mbedtls_md_get_size( md_info ); + hashlen = mbedtls_md_get_size(md_info); } - md_info = mbedtls_md_info_from_type( mgf1_hash_id ); - if( md_info == NULL ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + md_info = mbedtls_md_info_from_type(mgf1_hash_id); + if (md_info == NULL) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } - hlen = mbedtls_md_get_size( md_info ); + hlen = mbedtls_md_get_size(md_info); - memset( zeros, 0, 8 ); + memset(zeros, 0, 8); /* * Note: EMSA-PSS verification is over the length of N - 1 bits */ - msb = mbedtls_mpi_bitlen( &ctx->N ) - 1; + msb = mbedtls_mpi_bitlen(&ctx->N) - 1; - if( buf[0] >> ( 8 - siglen * 8 + msb ) ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (buf[0] >> (8 - siglen * 8 + msb)) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* Compensate for boundary condition when applying mask */ - if( msb % 8 == 0 ) - { + if (msb % 8 == 0) { p++; siglen -= 1; } - if( siglen < hlen + 2 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (siglen < hlen + 2) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } hash_start = p + siglen - hlen - 1; - mbedtls_md_init( &md_ctx ); - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 ) + mbedtls_md_init(&md_ctx); + if ((ret = mbedtls_md_setup(&md_ctx, md_info, 0)) != 0) { goto exit; + } - ret = mgf_mask( p, siglen - hlen - 1, hash_start, hlen, &md_ctx ); - if( ret != 0 ) + ret = mgf_mask(p, siglen - hlen - 1, hash_start, hlen, &md_ctx); + if (ret != 0) { goto exit; + } - buf[0] &= 0xFF >> ( siglen * 8 - msb ); + buf[0] &= 0xFF >> (siglen * 8 - msb); - while( p < hash_start - 1 && *p == 0 ) + while (p < hash_start - 1 && *p == 0) { p++; + } - if( *p++ != 0x01 ) - { + if (*p++ != 0x01) { ret = MBEDTLS_ERR_RSA_INVALID_PADDING; goto exit; } observed_salt_len = hash_start - p; - if( expected_salt_len != MBEDTLS_RSA_SALT_LEN_ANY && - observed_salt_len != (size_t) expected_salt_len ) - { + if (expected_salt_len != MBEDTLS_RSA_SALT_LEN_ANY && + observed_salt_len != (size_t) expected_salt_len) { ret = MBEDTLS_ERR_RSA_INVALID_PADDING; goto exit; } @@ -2108,63 +2140,67 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx, /* * Generate H = Hash( M' ) */ - ret = mbedtls_md_starts( &md_ctx ); - if ( ret != 0 ) + ret = mbedtls_md_starts(&md_ctx); + if (ret != 0) { goto exit; - ret = mbedtls_md_update( &md_ctx, zeros, 8 ); - if ( ret != 0 ) + } + ret = mbedtls_md_update(&md_ctx, zeros, 8); + if (ret != 0) { goto exit; - ret = mbedtls_md_update( &md_ctx, hash, hashlen ); - if ( ret != 0 ) + } + ret = mbedtls_md_update(&md_ctx, hash, hashlen); + if (ret != 0) { goto exit; - ret = mbedtls_md_update( &md_ctx, p, observed_salt_len ); - if ( ret != 0 ) + } + ret = mbedtls_md_update(&md_ctx, p, observed_salt_len); + if (ret != 0) { goto exit; - ret = mbedtls_md_finish( &md_ctx, result ); - if ( ret != 0 ) + } + ret = mbedtls_md_finish(&md_ctx, result); + if (ret != 0) { goto exit; + } - if( memcmp( hash_start, result, hlen ) != 0 ) - { + if (memcmp(hash_start, result, hlen) != 0) { ret = MBEDTLS_ERR_RSA_VERIFY_FAILED; goto exit; } exit: - mbedtls_md_free( &md_ctx ); + mbedtls_md_free(&md_ctx); - return( ret ); + return ret; } /* * Simplified PKCS#1 v2.1 RSASSA-PSS-VERIFY function */ -int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - const unsigned char *sig ) +int mbedtls_rsa_rsassa_pss_verify(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + const unsigned char *sig) { mbedtls_md_type_t mgf1_hash_id; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( sig != NULL ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); - - mgf1_hash_id = ( ctx->hash_id != MBEDTLS_MD_NONE ) + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(sig != NULL); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); + + mgf1_hash_id = (ctx->hash_id != MBEDTLS_MD_NONE) ? (mbedtls_md_type_t) ctx->hash_id : md_alg; - return( mbedtls_rsa_rsassa_pss_verify_ext( ctx, f_rng, p_rng, mode, - md_alg, hashlen, hash, - mgf1_hash_id, MBEDTLS_RSA_SALT_LEN_ANY, - sig ) ); + return mbedtls_rsa_rsassa_pss_verify_ext(ctx, f_rng, p_rng, mode, + md_alg, hashlen, hash, + mgf1_hash_id, MBEDTLS_RSA_SALT_LEN_ANY, + sig); } #endif /* MBEDTLS_PKCS1_V21 */ @@ -2173,196 +2209,195 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx, /* * Implementation of the PKCS#1 v2.1 RSASSA-PKCS1-v1_5-VERIFY function */ -int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - const unsigned char *sig ) +int mbedtls_rsa_rsassa_pkcs1_v15_verify(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + const unsigned char *sig) { int ret = 0; size_t sig_len; unsigned char *encoded = NULL, *encoded_expected = NULL; - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( sig != NULL ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(sig != NULL); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); sig_len = ctx->len; - if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 ) - return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); + if (mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15) { + return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; + } /* * Prepare expected PKCS1 v1.5 encoding of hash. */ - if( ( encoded = mbedtls_calloc( 1, sig_len ) ) == NULL || - ( encoded_expected = mbedtls_calloc( 1, sig_len ) ) == NULL ) - { + if ((encoded = mbedtls_calloc(1, sig_len)) == NULL || + (encoded_expected = mbedtls_calloc(1, sig_len)) == NULL) { ret = MBEDTLS_ERR_MPI_ALLOC_FAILED; goto cleanup; } - if( ( ret = rsa_rsassa_pkcs1_v15_encode( md_alg, hashlen, hash, sig_len, - encoded_expected ) ) != 0 ) + if ((ret = rsa_rsassa_pkcs1_v15_encode(md_alg, hashlen, hash, sig_len, + encoded_expected)) != 0) { goto cleanup; + } /* * Apply RSA primitive to get what should be PKCS1 encoded hash. */ - ret = ( mode == MBEDTLS_RSA_PUBLIC ) - ? mbedtls_rsa_public( ctx, sig, encoded ) - : mbedtls_rsa_private( ctx, f_rng, p_rng, sig, encoded ); - if( ret != 0 ) + ret = (mode == MBEDTLS_RSA_PUBLIC) + ? mbedtls_rsa_public(ctx, sig, encoded) + : mbedtls_rsa_private(ctx, f_rng, p_rng, sig, encoded); + if (ret != 0) { goto cleanup; + } /* * Compare */ - if( ( ret = mbedtls_ct_memcmp( encoded, encoded_expected, - sig_len ) ) != 0 ) - { + if ((ret = mbedtls_ct_memcmp(encoded, encoded_expected, + sig_len)) != 0) { ret = MBEDTLS_ERR_RSA_VERIFY_FAILED; goto cleanup; } cleanup: - if( encoded != NULL ) - { - mbedtls_platform_zeroize( encoded, sig_len ); - mbedtls_free( encoded ); + if (encoded != NULL) { + mbedtls_platform_zeroize(encoded, sig_len); + mbedtls_free(encoded); } - if( encoded_expected != NULL ) - { - mbedtls_platform_zeroize( encoded_expected, sig_len ); - mbedtls_free( encoded_expected ); + if (encoded_expected != NULL) { + mbedtls_platform_zeroize(encoded_expected, sig_len); + mbedtls_free(encoded_expected); } - return( ret ); + return ret; } #endif /* MBEDTLS_PKCS1_V15 */ /* * Do an RSA operation and check the message digest */ -int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng, - int mode, - mbedtls_md_type_t md_alg, - unsigned int hashlen, - const unsigned char *hash, - const unsigned char *sig ) +int mbedtls_rsa_pkcs1_verify(mbedtls_rsa_context *ctx, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + int mode, + mbedtls_md_type_t md_alg, + unsigned int hashlen, + const unsigned char *hash, + const unsigned char *sig) { - RSA_VALIDATE_RET( ctx != NULL ); - RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE || - mode == MBEDTLS_RSA_PUBLIC ); - RSA_VALIDATE_RET( sig != NULL ); - RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && - hashlen == 0 ) || - hash != NULL ); - - switch( ctx->padding ) - { + RSA_VALIDATE_RET(ctx != NULL); + RSA_VALIDATE_RET(mode == MBEDTLS_RSA_PRIVATE || + mode == MBEDTLS_RSA_PUBLIC); + RSA_VALIDATE_RET(sig != NULL); + RSA_VALIDATE_RET((md_alg == MBEDTLS_MD_NONE && + hashlen == 0) || + hash != NULL); + + switch (ctx->padding) { #if defined(MBEDTLS_PKCS1_V15) case MBEDTLS_RSA_PKCS_V15: - return mbedtls_rsa_rsassa_pkcs1_v15_verify( ctx, f_rng, p_rng, mode, md_alg, - hashlen, hash, sig ); + return mbedtls_rsa_rsassa_pkcs1_v15_verify(ctx, f_rng, p_rng, mode, md_alg, + hashlen, hash, sig); #endif #if defined(MBEDTLS_PKCS1_V21) case MBEDTLS_RSA_PKCS_V21: - return mbedtls_rsa_rsassa_pss_verify( ctx, f_rng, p_rng, mode, md_alg, - hashlen, hash, sig ); + return mbedtls_rsa_rsassa_pss_verify(ctx, f_rng, p_rng, mode, md_alg, + hashlen, hash, sig); #endif default: - return( MBEDTLS_ERR_RSA_INVALID_PADDING ); + return MBEDTLS_ERR_RSA_INVALID_PADDING; } } /* * Copy the components of an RSA key */ -int mbedtls_rsa_copy( mbedtls_rsa_context *dst, const mbedtls_rsa_context *src ) +int mbedtls_rsa_copy(mbedtls_rsa_context *dst, const mbedtls_rsa_context *src) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - RSA_VALIDATE_RET( dst != NULL ); - RSA_VALIDATE_RET( src != NULL ); + RSA_VALIDATE_RET(dst != NULL); + RSA_VALIDATE_RET(src != NULL); dst->len = src->len; - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->N, &src->N ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->E, &src->E ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->N, &src->N)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->E, &src->E)); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->D, &src->D ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->P, &src->P ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Q, &src->Q ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->D, &src->D)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->P, &src->P)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->Q, &src->Q)); #if !defined(MBEDTLS_RSA_NO_CRT) - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->DP, &src->DP ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->DQ, &src->DQ ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->QP, &src->QP ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RP, &src->RP ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RQ, &src->RQ ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->DP, &src->DP)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->DQ, &src->DQ)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->QP, &src->QP)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->RP, &src->RP)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->RQ, &src->RQ)); #endif - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RN, &src->RN ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->RN, &src->RN)); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Vi, &src->Vi ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Vf, &src->Vf ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->Vi, &src->Vi)); + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(&dst->Vf, &src->Vf)); dst->padding = src->padding; dst->hash_id = src->hash_id; cleanup: - if( ret != 0 ) - mbedtls_rsa_free( dst ); + if (ret != 0) { + mbedtls_rsa_free(dst); + } - return( ret ); + return ret; } /* * Free the components of an RSA key */ -void mbedtls_rsa_free( mbedtls_rsa_context *ctx ) +void mbedtls_rsa_free(mbedtls_rsa_context *ctx) { - if( ctx == NULL ) + if (ctx == NULL) { return; + } - mbedtls_mpi_free( &ctx->Vi ); - mbedtls_mpi_free( &ctx->Vf ); - mbedtls_mpi_free( &ctx->RN ); - mbedtls_mpi_free( &ctx->D ); - mbedtls_mpi_free( &ctx->Q ); - mbedtls_mpi_free( &ctx->P ); - mbedtls_mpi_free( &ctx->E ); - mbedtls_mpi_free( &ctx->N ); + mbedtls_mpi_free(&ctx->Vi); + mbedtls_mpi_free(&ctx->Vf); + mbedtls_mpi_free(&ctx->RN); + mbedtls_mpi_free(&ctx->D); + mbedtls_mpi_free(&ctx->Q); + mbedtls_mpi_free(&ctx->P); + mbedtls_mpi_free(&ctx->E); + mbedtls_mpi_free(&ctx->N); #if !defined(MBEDTLS_RSA_NO_CRT) - mbedtls_mpi_free( &ctx->RQ ); - mbedtls_mpi_free( &ctx->RP ); - mbedtls_mpi_free( &ctx->QP ); - mbedtls_mpi_free( &ctx->DQ ); - mbedtls_mpi_free( &ctx->DP ); + mbedtls_mpi_free(&ctx->RQ); + mbedtls_mpi_free(&ctx->RP); + mbedtls_mpi_free(&ctx->QP); + mbedtls_mpi_free(&ctx->DQ); + mbedtls_mpi_free(&ctx->DP); #endif /* MBEDTLS_RSA_NO_CRT */ #if defined(MBEDTLS_THREADING_C) /* Free the mutex, but only if it hasn't been freed already. */ - if( ctx->ver != 0 ) - { - mbedtls_mutex_free( &ctx->mutex ); + if (ctx->ver != 0) { + mbedtls_mutex_free(&ctx->mutex); ctx->ver = 0; } #endif @@ -2414,31 +2449,34 @@ void mbedtls_rsa_free( mbedtls_rsa_context *ctx ) "\x11\x22\x33\x0A\x0B\x0C\xCC\xDD\xDD\xDD\xDD\xDD" #if defined(MBEDTLS_PKCS1_V15) -static int myrand( void *rng_state, unsigned char *output, size_t len ) +static int myrand(void *rng_state, unsigned char *output, size_t len) { #if !defined(__OpenBSD__) && !defined(__NetBSD__) size_t i; - if( rng_state != NULL ) + if (rng_state != NULL) { rng_state = NULL; + } - for( i = 0; i < len; ++i ) + for (i = 0; i < len; ++i) { output[i] = rand(); + } #else - if( rng_state != NULL ) + if (rng_state != NULL) { rng_state = NULL; + } - arc4random_buf( output, len ); + arc4random_buf(output, len); #endif /* !OpenBSD && !NetBSD */ - return( 0 ); + return 0; } #endif /* MBEDTLS_PKCS1_V15 */ /* * Checkup routine */ -int mbedtls_rsa_self_test( int verbose ) +int mbedtls_rsa_self_test(int verbose) { int ret = 0; #if defined(MBEDTLS_PKCS1_V15) @@ -2453,128 +2491,136 @@ int mbedtls_rsa_self_test( int verbose ) mbedtls_mpi K; - mbedtls_mpi_init( &K ); - mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 ); + mbedtls_mpi_init(&K); + mbedtls_rsa_init(&rsa, MBEDTLS_RSA_PKCS_V15, 0); - MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &K, 16, RSA_N ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_import( &rsa, &K, NULL, NULL, NULL, NULL ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &K, 16, RSA_P ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_import( &rsa, NULL, &K, NULL, NULL, NULL ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &K, 16, RSA_Q ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_import( &rsa, NULL, NULL, &K, NULL, NULL ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &K, 16, RSA_D ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_import( &rsa, NULL, NULL, NULL, &K, NULL ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &K, 16, RSA_E ) ); - MBEDTLS_MPI_CHK( mbedtls_rsa_import( &rsa, NULL, NULL, NULL, NULL, &K ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&K, 16, RSA_N)); + MBEDTLS_MPI_CHK(mbedtls_rsa_import(&rsa, &K, NULL, NULL, NULL, NULL)); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&K, 16, RSA_P)); + MBEDTLS_MPI_CHK(mbedtls_rsa_import(&rsa, NULL, &K, NULL, NULL, NULL)); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&K, 16, RSA_Q)); + MBEDTLS_MPI_CHK(mbedtls_rsa_import(&rsa, NULL, NULL, &K, NULL, NULL)); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&K, 16, RSA_D)); + MBEDTLS_MPI_CHK(mbedtls_rsa_import(&rsa, NULL, NULL, NULL, &K, NULL)); + MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&K, 16, RSA_E)); + MBEDTLS_MPI_CHK(mbedtls_rsa_import(&rsa, NULL, NULL, NULL, NULL, &K)); - MBEDTLS_MPI_CHK( mbedtls_rsa_complete( &rsa ) ); + MBEDTLS_MPI_CHK(mbedtls_rsa_complete(&rsa)); - if( verbose != 0 ) - mbedtls_printf( " RSA key validation: " ); + if (verbose != 0) { + mbedtls_printf(" RSA key validation: "); + } - if( mbedtls_rsa_check_pubkey( &rsa ) != 0 || - mbedtls_rsa_check_privkey( &rsa ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_rsa_check_pubkey(&rsa) != 0 || + mbedtls_rsa_check_privkey(&rsa) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( verbose != 0 ) - mbedtls_printf( "passed\n PKCS#1 encryption : " ); + if (verbose != 0) { + mbedtls_printf("passed\n PKCS#1 encryption : "); + } - memcpy( rsa_plaintext, RSA_PT, PT_LEN ); + memcpy(rsa_plaintext, RSA_PT, PT_LEN); - if( mbedtls_rsa_pkcs1_encrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PUBLIC, - PT_LEN, rsa_plaintext, - rsa_ciphertext ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_rsa_pkcs1_encrypt(&rsa, myrand, NULL, MBEDTLS_RSA_PUBLIC, + PT_LEN, rsa_plaintext, + rsa_ciphertext) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( verbose != 0 ) - mbedtls_printf( "passed\n PKCS#1 decryption : " ); + if (verbose != 0) { + mbedtls_printf("passed\n PKCS#1 decryption : "); + } - if( mbedtls_rsa_pkcs1_decrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, - &len, rsa_ciphertext, rsa_decrypted, - sizeof(rsa_decrypted) ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_rsa_pkcs1_decrypt(&rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, + &len, rsa_ciphertext, rsa_decrypted, + sizeof(rsa_decrypted)) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( memcmp( rsa_decrypted, rsa_plaintext, len ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (memcmp(rsa_decrypted, rsa_plaintext, len) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( verbose != 0 ) - mbedtls_printf( "passed\n" ); + if (verbose != 0) { + mbedtls_printf("passed\n"); + } #if defined(MBEDTLS_SHA1_C) - if( verbose != 0 ) - mbedtls_printf( " PKCS#1 data sign : " ); + if (verbose != 0) { + mbedtls_printf(" PKCS#1 data sign : "); + } - if( mbedtls_sha1_ret( rsa_plaintext, PT_LEN, sha1sum ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_sha1_ret(rsa_plaintext, PT_LEN, sha1sum) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } - return( 1 ); + return 1; } - if( mbedtls_rsa_pkcs1_sign( &rsa, myrand, NULL, - MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA1, 0, - sha1sum, rsa_ciphertext ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_rsa_pkcs1_sign(&rsa, myrand, NULL, + MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA1, 0, + sha1sum, rsa_ciphertext) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( verbose != 0 ) - mbedtls_printf( "passed\n PKCS#1 sig. verify: " ); + if (verbose != 0) { + mbedtls_printf("passed\n PKCS#1 sig. verify: "); + } - if( mbedtls_rsa_pkcs1_verify( &rsa, NULL, NULL, - MBEDTLS_RSA_PUBLIC, MBEDTLS_MD_SHA1, 0, - sha1sum, rsa_ciphertext ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); + if (mbedtls_rsa_pkcs1_verify(&rsa, NULL, NULL, + MBEDTLS_RSA_PUBLIC, MBEDTLS_MD_SHA1, 0, + sha1sum, rsa_ciphertext) != 0) { + if (verbose != 0) { + mbedtls_printf("failed\n"); + } ret = 1; goto cleanup; } - if( verbose != 0 ) - mbedtls_printf( "passed\n" ); + if (verbose != 0) { + mbedtls_printf("passed\n"); + } #endif /* MBEDTLS_SHA1_C */ - if( verbose != 0 ) - mbedtls_printf( "\n" ); + if (verbose != 0) { + mbedtls_printf("\n"); + } cleanup: - mbedtls_mpi_free( &K ); - mbedtls_rsa_free( &rsa ); + mbedtls_mpi_free(&K); + mbedtls_rsa_free(&rsa); #else /* MBEDTLS_PKCS1_V15 */ ((void) verbose); #endif /* MBEDTLS_PKCS1_V15 */ - return( ret ); + return ret; } #endif /* MBEDTLS_SELF_TEST */ |