diff options
Diffstat (limited to 'thirdparty/mbedtls/library/gcm.c')
| -rw-r--r-- | thirdparty/mbedtls/library/gcm.c | 958 |
1 files changed, 958 insertions, 0 deletions
diff --git a/thirdparty/mbedtls/library/gcm.c b/thirdparty/mbedtls/library/gcm.c new file mode 100644 index 0000000000..294a86d3d4 --- /dev/null +++ b/thirdparty/mbedtls/library/gcm.c @@ -0,0 +1,958 @@ +/* + * NIST SP800-38D compliant GCM implementation + * + * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * This file is part of mbed TLS (https://tls.mbed.org) + */ + +/* + * http://csrc.nist.gov/publications/nistpubs/800-38D/SP-800-38D.pdf + * + * See also: + * [MGV] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf + * + * We use the algorithm described as Shoup's method with 4-bit tables in + * [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory. + */ + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#if defined(MBEDTLS_GCM_C) + +#include "mbedtls/gcm.h" + +#include <string.h> + +#if defined(MBEDTLS_AESNI_C) +#include "mbedtls/aesni.h" +#endif + +#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) +#include "mbedtls/aes.h" +#if defined(MBEDTLS_PLATFORM_C) +#include "mbedtls/platform.h" +#else +#include <stdio.h> +#define mbedtls_printf printf +#endif /* MBEDTLS_PLATFORM_C */ +#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */ + +#if !defined(MBEDTLS_GCM_ALT) + +/* + * 32-bit integer manipulation macros (big endian) + */ +#ifndef GET_UINT32_BE +#define GET_UINT32_BE(n,b,i) \ +{ \ + (n) = ( (uint32_t) (b)[(i) ] << 24 ) \ + | ( (uint32_t) (b)[(i) + 1] << 16 ) \ + | ( (uint32_t) (b)[(i) + 2] << 8 ) \ + | ( (uint32_t) (b)[(i) + 3] ); \ +} +#endif + +#ifndef PUT_UINT32_BE +#define PUT_UINT32_BE(n,b,i) \ +{ \ + (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ + (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ + (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ + (b)[(i) + 3] = (unsigned char) ( (n) ); \ +} +#endif + +/* Implementation that should never be optimized out by the compiler */ +static void mbedtls_zeroize( void *v, size_t n ) { + volatile unsigned char *p = v; while( n-- ) *p++ = 0; +} + +/* + * Initialize a context + */ +void mbedtls_gcm_init( mbedtls_gcm_context *ctx ) +{ + memset( ctx, 0, sizeof( mbedtls_gcm_context ) ); +} + +/* + * Precompute small multiples of H, that is set + * HH[i] || HL[i] = H times i, + * where i is seen as a field element as in [MGV], ie high-order bits + * correspond to low powers of P. The result is stored in the same way, that + * is the high-order bit of HH corresponds to P^0 and the low-order bit of HL + * corresponds to P^127. + */ +static int gcm_gen_table( mbedtls_gcm_context *ctx ) +{ + int ret, i, j; + uint64_t hi, lo; + uint64_t vl, vh; + unsigned char h[16]; + size_t olen = 0; + + memset( h, 0, 16 ); + if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, h, 16, h, &olen ) ) != 0 ) + return( ret ); + + /* pack h as two 64-bits ints, big-endian */ + GET_UINT32_BE( hi, h, 0 ); + GET_UINT32_BE( lo, h, 4 ); + vh = (uint64_t) hi << 32 | lo; + + GET_UINT32_BE( hi, h, 8 ); + GET_UINT32_BE( lo, h, 12 ); + vl = (uint64_t) hi << 32 | lo; + + /* 8 = 1000 corresponds to 1 in GF(2^128) */ + ctx->HL[8] = vl; + ctx->HH[8] = vh; + +#if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64) + /* With CLMUL support, we need only h, not the rest of the table */ + if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) ) + return( 0 ); +#endif + + /* 0 corresponds to 0 in GF(2^128) */ + ctx->HH[0] = 0; + ctx->HL[0] = 0; + + for( i = 4; i > 0; i >>= 1 ) + { + uint32_t T = ( vl & 1 ) * 0xe1000000U; + vl = ( vh << 63 ) | ( vl >> 1 ); + vh = ( vh >> 1 ) ^ ( (uint64_t) T << 32); + + ctx->HL[i] = vl; + ctx->HH[i] = vh; + } + + for( i = 2; i <= 8; i *= 2 ) + { + uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i; + vh = *HiH; + vl = *HiL; + for( j = 1; j < i; j++ ) + { + HiH[j] = vh ^ ctx->HH[j]; + HiL[j] = vl ^ ctx->HL[j]; + } + } + + return( 0 ); +} + +int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx, + mbedtls_cipher_id_t cipher, + const unsigned char *key, + unsigned int keybits ) +{ + int ret; + const mbedtls_cipher_info_t *cipher_info; + + cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB ); + if( cipher_info == NULL ) + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + + if( cipher_info->block_size != 16 ) + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + + mbedtls_cipher_free( &ctx->cipher_ctx ); + + if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 ) + return( ret ); + + if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits, + MBEDTLS_ENCRYPT ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = gcm_gen_table( ctx ) ) != 0 ) + return( ret ); + + return( 0 ); +} + +/* + * Shoup's method for multiplication use this table with + * last4[x] = x times P^128 + * where x and last4[x] are seen as elements of GF(2^128) as in [MGV] + */ +static const uint64_t last4[16] = +{ + 0x0000, 0x1c20, 0x3840, 0x2460, + 0x7080, 0x6ca0, 0x48c0, 0x54e0, + 0xe100, 0xfd20, 0xd940, 0xc560, + 0x9180, 0x8da0, 0xa9c0, 0xb5e0 +}; + +/* + * Sets output to x times H using the precomputed tables. + * x and output are seen as elements of GF(2^128) as in [MGV]. + */ +static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16], + unsigned char output[16] ) +{ + int i = 0; + unsigned char lo, hi, rem; + uint64_t zh, zl; + +#if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64) + if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) ) { + unsigned char h[16]; + + PUT_UINT32_BE( ctx->HH[8] >> 32, h, 0 ); + PUT_UINT32_BE( ctx->HH[8], h, 4 ); + PUT_UINT32_BE( ctx->HL[8] >> 32, h, 8 ); + PUT_UINT32_BE( ctx->HL[8], h, 12 ); + + mbedtls_aesni_gcm_mult( output, x, h ); + return; + } +#endif /* MBEDTLS_AESNI_C && MBEDTLS_HAVE_X86_64 */ + + lo = x[15] & 0xf; + + zh = ctx->HH[lo]; + zl = ctx->HL[lo]; + + for( i = 15; i >= 0; i-- ) + { + lo = x[i] & 0xf; + hi = x[i] >> 4; + + if( i != 15 ) + { + rem = (unsigned char) zl & 0xf; + zl = ( zh << 60 ) | ( zl >> 4 ); + zh = ( zh >> 4 ); + zh ^= (uint64_t) last4[rem] << 48; + zh ^= ctx->HH[lo]; + zl ^= ctx->HL[lo]; + + } + + rem = (unsigned char) zl & 0xf; + zl = ( zh << 60 ) | ( zl >> 4 ); + zh = ( zh >> 4 ); + zh ^= (uint64_t) last4[rem] << 48; + zh ^= ctx->HH[hi]; + zl ^= ctx->HL[hi]; + } + + PUT_UINT32_BE( zh >> 32, output, 0 ); + PUT_UINT32_BE( zh, output, 4 ); + PUT_UINT32_BE( zl >> 32, output, 8 ); + PUT_UINT32_BE( zl, output, 12 ); +} + +int mbedtls_gcm_starts( mbedtls_gcm_context *ctx, + int mode, + const unsigned char *iv, + size_t iv_len, + const unsigned char *add, + size_t add_len ) +{ + int ret; + unsigned char work_buf[16]; + size_t i; + const unsigned char *p; + size_t use_len, olen = 0; + + /* IV and AD are limited to 2^64 bits, so 2^61 bytes */ + /* IV is not allowed to be zero length */ + if( iv_len == 0 || + ( (uint64_t) iv_len ) >> 61 != 0 || + ( (uint64_t) add_len ) >> 61 != 0 ) + { + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + } + + memset( ctx->y, 0x00, sizeof(ctx->y) ); + memset( ctx->buf, 0x00, sizeof(ctx->buf) ); + + ctx->mode = mode; + ctx->len = 0; + ctx->add_len = 0; + + if( iv_len == 12 ) + { + memcpy( ctx->y, iv, iv_len ); + ctx->y[15] = 1; + } + else + { + memset( work_buf, 0x00, 16 ); + PUT_UINT32_BE( iv_len * 8, work_buf, 12 ); + + p = iv; + while( iv_len > 0 ) + { + use_len = ( iv_len < 16 ) ? iv_len : 16; + + for( i = 0; i < use_len; i++ ) + ctx->y[i] ^= p[i]; + + gcm_mult( ctx, ctx->y, ctx->y ); + + iv_len -= use_len; + p += use_len; + } + + for( i = 0; i < 16; i++ ) + ctx->y[i] ^= work_buf[i]; + + gcm_mult( ctx, ctx->y, ctx->y ); + } + + if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ctx->base_ectr, + &olen ) ) != 0 ) + { + return( ret ); + } + + ctx->add_len = add_len; + p = add; + while( add_len > 0 ) + { + use_len = ( add_len < 16 ) ? add_len : 16; + + for( i = 0; i < use_len; i++ ) + ctx->buf[i] ^= p[i]; + + gcm_mult( ctx, ctx->buf, ctx->buf ); + + add_len -= use_len; + p += use_len; + } + + return( 0 ); +} + +int mbedtls_gcm_update( mbedtls_gcm_context *ctx, + size_t length, + const unsigned char *input, + unsigned char *output ) +{ + int ret; + unsigned char ectr[16]; + size_t i; + const unsigned char *p; + unsigned char *out_p = output; + size_t use_len, olen = 0; + + if( output > input && (size_t) ( output - input ) < length ) + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + + /* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes + * Also check for possible overflow */ + if( ctx->len + length < ctx->len || + (uint64_t) ctx->len + length > 0xFFFFFFFE0ull ) + { + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + } + + ctx->len += length; + + p = input; + while( length > 0 ) + { + use_len = ( length < 16 ) ? length : 16; + + for( i = 16; i > 12; i-- ) + if( ++ctx->y[i - 1] != 0 ) + break; + + if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr, + &olen ) ) != 0 ) + { + return( ret ); + } + + for( i = 0; i < use_len; i++ ) + { + if( ctx->mode == MBEDTLS_GCM_DECRYPT ) + ctx->buf[i] ^= p[i]; + out_p[i] = ectr[i] ^ p[i]; + if( ctx->mode == MBEDTLS_GCM_ENCRYPT ) + ctx->buf[i] ^= out_p[i]; + } + + gcm_mult( ctx, ctx->buf, ctx->buf ); + + length -= use_len; + p += use_len; + out_p += use_len; + } + + return( 0 ); +} + +int mbedtls_gcm_finish( mbedtls_gcm_context *ctx, + unsigned char *tag, + size_t tag_len ) +{ + unsigned char work_buf[16]; + size_t i; + uint64_t orig_len = ctx->len * 8; + uint64_t orig_add_len = ctx->add_len * 8; + + if( tag_len > 16 || tag_len < 4 ) + return( MBEDTLS_ERR_GCM_BAD_INPUT ); + + memcpy( tag, ctx->base_ectr, tag_len ); + + if( orig_len || orig_add_len ) + { + memset( work_buf, 0x00, 16 ); + + PUT_UINT32_BE( ( orig_add_len >> 32 ), work_buf, 0 ); + PUT_UINT32_BE( ( orig_add_len ), work_buf, 4 ); + PUT_UINT32_BE( ( orig_len >> 32 ), work_buf, 8 ); + PUT_UINT32_BE( ( orig_len ), work_buf, 12 ); + + for( i = 0; i < 16; i++ ) + ctx->buf[i] ^= work_buf[i]; + + gcm_mult( ctx, ctx->buf, ctx->buf ); + + for( i = 0; i < tag_len; i++ ) + tag[i] ^= ctx->buf[i]; + } + + return( 0 ); +} + +int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx, + int mode, + size_t length, + const unsigned char *iv, + size_t iv_len, + const unsigned char *add, + size_t add_len, + const unsigned char *input, + unsigned char *output, + size_t tag_len, + unsigned char *tag ) +{ + int ret; + + if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 ) + return( ret ); + + if( ( ret = mbedtls_gcm_update( ctx, length, input, output ) ) != 0 ) + return( ret ); + + if( ( ret = mbedtls_gcm_finish( ctx, tag, tag_len ) ) != 0 ) + return( ret ); + + return( 0 ); +} + +int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx, + size_t length, + const unsigned char *iv, + size_t iv_len, + const unsigned char *add, + size_t add_len, + const unsigned char *tag, + size_t tag_len, + const unsigned char *input, + unsigned char *output ) +{ + int ret; + unsigned char check_tag[16]; + size_t i; + int diff; + + if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length, + iv, iv_len, add, add_len, + input, output, tag_len, check_tag ) ) != 0 ) + { + return( ret ); + } + + /* Check tag in "constant-time" */ + for( diff = 0, i = 0; i < tag_len; i++ ) + diff |= tag[i] ^ check_tag[i]; + + if( diff != 0 ) + { + mbedtls_zeroize( output, length ); + return( MBEDTLS_ERR_GCM_AUTH_FAILED ); + } + + return( 0 ); +} + +void mbedtls_gcm_free( mbedtls_gcm_context *ctx ) +{ + mbedtls_cipher_free( &ctx->cipher_ctx ); + mbedtls_zeroize( ctx, sizeof( mbedtls_gcm_context ) ); +} + +#endif /* !MBEDTLS_GCM_ALT */ + +#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) +/* + * AES-GCM test vectors from: + * + * http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip + */ +#define MAX_TESTS 6 + +static const int key_index[MAX_TESTS] = + { 0, 0, 1, 1, 1, 1 }; + +static const unsigned char key[MAX_TESTS][32] = +{ + { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, + { 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c, + 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, + 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c, + 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08 }, +}; + +static const size_t iv_len[MAX_TESTS] = + { 12, 12, 12, 12, 8, 60 }; + +static const int iv_index[MAX_TESTS] = + { 0, 0, 1, 1, 1, 2 }; + +static const unsigned char iv[MAX_TESTS][64] = +{ + { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 }, + { 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad, + 0xde, 0xca, 0xf8, 0x88 }, + { 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5, + 0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa, + 0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1, + 0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28, + 0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39, + 0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54, + 0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57, + 0xa6, 0x37, 0xb3, 0x9b }, +}; + +static const size_t add_len[MAX_TESTS] = + { 0, 0, 0, 20, 20, 20 }; + +static const int add_index[MAX_TESTS] = + { 0, 0, 0, 1, 1, 1 }; + +static const unsigned char additional[MAX_TESTS][64] = +{ + { 0x00 }, + { 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xab, 0xad, 0xda, 0xd2 }, +}; + +static const size_t pt_len[MAX_TESTS] = + { 0, 16, 64, 60, 60, 60 }; + +static const int pt_index[MAX_TESTS] = + { 0, 0, 1, 1, 1, 1 }; + +static const unsigned char pt[MAX_TESTS][64] = +{ + { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, + { 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5, + 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a, + 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda, + 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72, + 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53, + 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25, + 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57, + 0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55 }, +}; + +static const unsigned char ct[MAX_TESTS * 3][64] = +{ + { 0x00 }, + { 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92, + 0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 }, + { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24, + 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c, + 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0, + 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e, + 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c, + 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05, + 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97, + 0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85 }, + { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24, + 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c, + 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0, + 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e, + 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c, + 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05, + 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97, + 0x3d, 0x58, 0xe0, 0x91 }, + { 0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a, + 0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55, + 0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8, + 0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23, + 0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2, + 0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42, + 0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07, + 0xc2, 0x3f, 0x45, 0x98 }, + { 0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6, + 0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94, + 0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8, + 0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7, + 0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90, + 0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f, + 0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03, + 0x4c, 0x34, 0xae, 0xe5 }, + { 0x00 }, + { 0x98, 0xe7, 0x24, 0x7c, 0x07, 0xf0, 0xfe, 0x41, + 0x1c, 0x26, 0x7e, 0x43, 0x84, 0xb0, 0xf6, 0x00 }, + { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41, + 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57, + 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84, + 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c, + 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25, + 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47, + 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9, + 0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56 }, + { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41, + 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57, + 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84, + 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c, + 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25, + 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47, + 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9, + 0xcc, 0xda, 0x27, 0x10 }, + { 0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54, + 0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, 0x4d, 0xb8, + 0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f, + 0x83, 0x47, 0x28, 0x0f, 0xc4, 0x50, 0x70, 0x57, + 0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75, + 0xc6, 0x65, 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9, + 0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f, + 0xa0, 0xf0, 0x62, 0xf7 }, + { 0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c, + 0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, 0xf9, 0xff, + 0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef, + 0x6e, 0xf7, 0xb7, 0x98, 0x28, 0x66, 0x6e, 0x45, + 0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9, + 0xe2, 0xf0, 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3, + 0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7, + 0xe9, 0xb7, 0x37, 0x3b }, + { 0x00 }, + { 0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e, + 0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18 }, + { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07, + 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d, + 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9, + 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa, + 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d, + 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38, + 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a, + 0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad }, + { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07, + 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d, + 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9, + 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa, + 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d, + 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38, + 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a, + 0xbc, 0xc9, 0xf6, 0x62 }, + { 0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32, + 0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, 0x44, 0xcb, + 0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa, + 0xc5, 0x2f, 0xf7, 0xd7, 0x9b, 0xba, 0x9d, 0xe0, + 0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0, + 0x95, 0x4c, 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78, + 0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99, + 0xf4, 0x7c, 0x9b, 0x1f }, + { 0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1, + 0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, 0x2a, 0x20, + 0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19, + 0xa0, 0x58, 0xab, 0x4f, 0x6f, 0x74, 0x6b, 0xf4, + 0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45, + 0x2d, 0xa3, 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde, + 0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e, + 0x44, 0xae, 0x7e, 0x3f }, +}; + +static const unsigned char tag[MAX_TESTS * 3][16] = +{ + { 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61, + 0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a }, + { 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd, + 0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf }, + { 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6, + 0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4 }, + { 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb, + 0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47 }, + { 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85, + 0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb }, + { 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa, + 0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50 }, + { 0xcd, 0x33, 0xb2, 0x8a, 0xc7, 0x73, 0xf7, 0x4b, + 0xa0, 0x0e, 0xd1, 0xf3, 0x12, 0x57, 0x24, 0x35 }, + { 0x2f, 0xf5, 0x8d, 0x80, 0x03, 0x39, 0x27, 0xab, + 0x8e, 0xf4, 0xd4, 0x58, 0x75, 0x14, 0xf0, 0xfb }, + { 0x99, 0x24, 0xa7, 0xc8, 0x58, 0x73, 0x36, 0xbf, + 0xb1, 0x18, 0x02, 0x4d, 0xb8, 0x67, 0x4a, 0x14 }, + { 0x25, 0x19, 0x49, 0x8e, 0x80, 0xf1, 0x47, 0x8f, + 0x37, 0xba, 0x55, 0xbd, 0x6d, 0x27, 0x61, 0x8c }, + { 0x65, 0xdc, 0xc5, 0x7f, 0xcf, 0x62, 0x3a, 0x24, + 0x09, 0x4f, 0xcc, 0xa4, 0x0d, 0x35, 0x33, 0xf8 }, + { 0xdc, 0xf5, 0x66, 0xff, 0x29, 0x1c, 0x25, 0xbb, + 0xb8, 0x56, 0x8f, 0xc3, 0xd3, 0x76, 0xa6, 0xd9 }, + { 0x53, 0x0f, 0x8a, 0xfb, 0xc7, 0x45, 0x36, 0xb9, + 0xa9, 0x63, 0xb4, 0xf1, 0xc4, 0xcb, 0x73, 0x8b }, + { 0xd0, 0xd1, 0xc8, 0xa7, 0x99, 0x99, 0x6b, 0xf0, + 0x26, 0x5b, 0x98, 0xb5, 0xd4, 0x8a, 0xb9, 0x19 }, + { 0xb0, 0x94, 0xda, 0xc5, 0xd9, 0x34, 0x71, 0xbd, + 0xec, 0x1a, 0x50, 0x22, 0x70, 0xe3, 0xcc, 0x6c }, + { 0x76, 0xfc, 0x6e, 0xce, 0x0f, 0x4e, 0x17, 0x68, + 0xcd, 0xdf, 0x88, 0x53, 0xbb, 0x2d, 0x55, 0x1b }, + { 0x3a, 0x33, 0x7d, 0xbf, 0x46, 0xa7, 0x92, 0xc4, + 0x5e, 0x45, 0x49, 0x13, 0xfe, 0x2e, 0xa8, 0xf2 }, + { 0xa4, 0x4a, 0x82, 0x66, 0xee, 0x1c, 0x8e, 0xb0, + 0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a }, +}; + +int mbedtls_gcm_self_test( int verbose ) +{ + mbedtls_gcm_context ctx; + unsigned char buf[64]; + unsigned char tag_buf[16]; + int i, j, ret; + mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES; + + for( j = 0; j < 3; j++ ) + { + int key_len = 128 + 64 * j; + + for( i = 0; i < MAX_TESTS; i++ ) + { + mbedtls_gcm_init( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( " AES-GCM-%3d #%d (%s): ", + key_len, i, "enc" ); + + ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], + key_len ); + /* + * AES-192 is an optional feature that may be unavailable when + * there is an alternative underlying implementation i.e. when + * MBEDTLS_AES_ALT is defined. + */ + if( ret == MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE && key_len == 192 ) + { + mbedtls_printf( "skipped\n" ); + break; + } + else if( ret != 0 ) + { + goto exit; + } + + ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT, + pt_len[i], + iv[iv_index[i]], iv_len[i], + additional[add_index[i]], add_len[i], + pt[pt_index[i]], buf, 16, tag_buf ); + if( ret != 0 ) + goto exit; + + if ( memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 || + memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 ) + { + ret = 1; + goto exit; + } + + mbedtls_gcm_free( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + + mbedtls_gcm_init( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( " AES-GCM-%3d #%d (%s): ", + key_len, i, "dec" ); + + ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], + key_len ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_DECRYPT, + pt_len[i], + iv[iv_index[i]], iv_len[i], + additional[add_index[i]], add_len[i], + ct[j * 6 + i], buf, 16, tag_buf ); + + if( ret != 0 ) + goto exit; + + if( memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 || + memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 ) + { + ret = 1; + goto exit; + } + + mbedtls_gcm_free( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + + mbedtls_gcm_init( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( " AES-GCM-%3d #%d split (%s): ", + key_len, i, "enc" ); + + ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], + key_len ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_ENCRYPT, + iv[iv_index[i]], iv_len[i], + additional[add_index[i]], add_len[i] ); + if( ret != 0 ) + goto exit; + + if( pt_len[i] > 32 ) + { + size_t rest_len = pt_len[i] - 32; + ret = mbedtls_gcm_update( &ctx, 32, pt[pt_index[i]], buf ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_gcm_update( &ctx, rest_len, pt[pt_index[i]] + 32, + buf + 32 ); + if( ret != 0 ) + goto exit; + } + else + { + ret = mbedtls_gcm_update( &ctx, pt_len[i], pt[pt_index[i]], buf ); + if( ret != 0 ) + goto exit; + } + + ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 ); + if( ret != 0 ) + goto exit; + + if( memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 || + memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 ) + { + ret = 1; + goto exit; + } + + mbedtls_gcm_free( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + + mbedtls_gcm_init( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( " AES-GCM-%3d #%d split (%s): ", + key_len, i, "dec" ); + + ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], + key_len ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_DECRYPT, + iv[iv_index[i]], iv_len[i], + additional[add_index[i]], add_len[i] ); + if( ret != 0 ) + goto exit; + + if( pt_len[i] > 32 ) + { + size_t rest_len = pt_len[i] - 32; + ret = mbedtls_gcm_update( &ctx, 32, ct[j * 6 + i], buf ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_gcm_update( &ctx, rest_len, ct[j * 6 + i] + 32, + buf + 32 ); + if( ret != 0 ) + goto exit; + } + else + { + ret = mbedtls_gcm_update( &ctx, pt_len[i], ct[j * 6 + i], + buf ); + if( ret != 0 ) + goto exit; + } + + ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 ); + if( ret != 0 ) + goto exit; + + if( memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 || + memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 ) + { + ret = 1; + goto exit; + } + + mbedtls_gcm_free( &ctx ); + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + } + } + + if( verbose != 0 ) + mbedtls_printf( "\n" ); + + ret = 0; + +exit: + if( ret != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + mbedtls_gcm_free( &ctx ); + } + + return( ret ); +} + +#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */ + +#endif /* MBEDTLS_GCM_C */ |