diff options
Diffstat (limited to 'thirdparty/mbedtls/library/sha512.c')
| -rw-r--r-- | thirdparty/mbedtls/library/sha512.c | 84 |
1 files changed, 49 insertions, 35 deletions
diff --git a/thirdparty/mbedtls/library/sha512.c b/thirdparty/mbedtls/library/sha512.c index 36d5d96146..986037ab7c 100644 --- a/thirdparty/mbedtls/library/sha512.c +++ b/thirdparty/mbedtls/library/sha512.c @@ -243,8 +243,11 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx, const unsigned char data[128] ) { int i; - uint64_t temp1, temp2, W[80]; - uint64_t A, B, C, D, E, F, G, H; + struct + { + uint64_t temp1, temp2, W[80]; + uint64_t A, B, C, D, E, F, G, H; + } local; SHA512_VALIDATE_RET( ctx != NULL ); SHA512_VALIDATE_RET( (const unsigned char *)data != NULL ); @@ -261,56 +264,67 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx, #define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y)))) #define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z)))) -#define P(a,b,c,d,e,f,g,h,x,K) \ - do \ - { \ - temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x); \ - temp2 = S2(a) + F0((a),(b),(c)); \ - (d) += temp1; (h) = temp1 + temp2; \ +#define P(a,b,c,d,e,f,g,h,x,K) \ + do \ + { \ + local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x); \ + local.temp2 = S2(a) + F0((a),(b),(c)); \ + (d) += local.temp1; (h) = local.temp1 + local.temp2; \ } while( 0 ) for( i = 0; i < 16; i++ ) { - GET_UINT64_BE( W[i], data, i << 3 ); + GET_UINT64_BE( local.W[i], data, i << 3 ); } for( ; i < 80; i++ ) { - W[i] = S1(W[i - 2]) + W[i - 7] + - S0(W[i - 15]) + W[i - 16]; + local.W[i] = S1(local.W[i - 2]) + local.W[i - 7] + + S0(local.W[i - 15]) + local.W[i - 16]; } - A = ctx->state[0]; - B = ctx->state[1]; - C = ctx->state[2]; - D = ctx->state[3]; - E = ctx->state[4]; - F = ctx->state[5]; - G = ctx->state[6]; - H = ctx->state[7]; + local.A = ctx->state[0]; + local.B = ctx->state[1]; + local.C = ctx->state[2]; + local.D = ctx->state[3]; + local.E = ctx->state[4]; + local.F = ctx->state[5]; + local.G = ctx->state[6]; + local.H = ctx->state[7]; i = 0; do { - P( A, B, C, D, E, F, G, H, W[i], K[i] ); i++; - P( H, A, B, C, D, E, F, G, W[i], K[i] ); i++; - P( G, H, A, B, C, D, E, F, W[i], K[i] ); i++; - P( F, G, H, A, B, C, D, E, W[i], K[i] ); i++; - P( E, F, G, H, A, B, C, D, W[i], K[i] ); i++; - P( D, E, F, G, H, A, B, C, W[i], K[i] ); i++; - P( C, D, E, F, G, H, A, B, W[i], K[i] ); i++; - P( B, C, D, E, F, G, H, A, W[i], K[i] ); i++; + P( local.A, local.B, local.C, local.D, local.E, + local.F, local.G, local.H, local.W[i], K[i] ); i++; + P( local.H, local.A, local.B, local.C, local.D, + local.E, local.F, local.G, local.W[i], K[i] ); i++; + P( local.G, local.H, local.A, local.B, local.C, + local.D, local.E, local.F, local.W[i], K[i] ); i++; + P( local.F, local.G, local.H, local.A, local.B, + local.C, local.D, local.E, local.W[i], K[i] ); i++; + P( local.E, local.F, local.G, local.H, local.A, + local.B, local.C, local.D, local.W[i], K[i] ); i++; + P( local.D, local.E, local.F, local.G, local.H, + local.A, local.B, local.C, local.W[i], K[i] ); i++; + P( local.C, local.D, local.E, local.F, local.G, + local.H, local.A, local.B, local.W[i], K[i] ); i++; + P( local.B, local.C, local.D, local.E, local.F, + local.G, local.H, local.A, local.W[i], K[i] ); i++; } while( i < 80 ); - ctx->state[0] += A; - ctx->state[1] += B; - ctx->state[2] += C; - ctx->state[3] += D; - ctx->state[4] += E; - ctx->state[5] += F; - ctx->state[6] += G; - ctx->state[7] += H; + ctx->state[0] += local.A; + ctx->state[1] += local.B; + ctx->state[2] += local.C; + ctx->state[3] += local.D; + ctx->state[4] += local.E; + ctx->state[5] += local.F; + ctx->state[6] += local.G; + ctx->state[7] += local.H; + + /* Zeroise buffers and variables to clear sensitive data from memory. */ + mbedtls_platform_zeroize( &local, sizeof( local ) ); return( 0 ); } |