1012 lines
33 KiB
C
1012 lines
33 KiB
C
/*
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* NIST SP800-38D compliant GCM implementation
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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/*
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* http://csrc.nist.gov/publications/nistpubs/800-38D/SP-800-38D.pdf
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*
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* See also:
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* [MGV] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf
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*
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* We use the algorithm described as Shoup's method with 4-bit tables in
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* [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory.
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*/
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#include "common.h"
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#if defined(MBEDTLS_GCM_C)
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#include "mbedtls/gcm.h"
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#include "mbedtls/constant_time.h"
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#include <string.h>
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#if defined(MBEDTLS_AESNI_C)
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#include "mbedtls/aesni.h"
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#endif
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#if !defined(MBEDTLS_GCM_ALT)
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/* Parameter validation macros */
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#define GCM_VALIDATE_RET(cond) \
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MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_GCM_BAD_INPUT)
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#define GCM_VALIDATE(cond) \
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MBEDTLS_INTERNAL_VALIDATE(cond)
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/*
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* Initialize a context
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*/
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void mbedtls_gcm_init(mbedtls_gcm_context *ctx)
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{
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GCM_VALIDATE(ctx != NULL);
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memset(ctx, 0, sizeof(mbedtls_gcm_context));
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}
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/*
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* Precompute small multiples of H, that is set
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* HH[i] || HL[i] = H times i,
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* where i is seen as a field element as in [MGV], ie high-order bits
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* correspond to low powers of P. The result is stored in the same way, that
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* is the high-order bit of HH corresponds to P^0 and the low-order bit of HL
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* corresponds to P^127.
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*/
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static int gcm_gen_table(mbedtls_gcm_context *ctx)
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{
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int ret, i, j;
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uint64_t hi, lo;
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uint64_t vl, vh;
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unsigned char h[16];
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size_t olen = 0;
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memset(h, 0, 16);
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if ((ret = mbedtls_cipher_update(&ctx->cipher_ctx, h, 16, h, &olen)) != 0) {
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return ret;
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}
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/* pack h as two 64-bits ints, big-endian */
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hi = MBEDTLS_GET_UINT32_BE(h, 0);
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lo = MBEDTLS_GET_UINT32_BE(h, 4);
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vh = (uint64_t) hi << 32 | lo;
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hi = MBEDTLS_GET_UINT32_BE(h, 8);
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lo = MBEDTLS_GET_UINT32_BE(h, 12);
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vl = (uint64_t) hi << 32 | lo;
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/* 8 = 1000 corresponds to 1 in GF(2^128) */
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ctx->HL[8] = vl;
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ctx->HH[8] = vh;
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#if defined(MBEDTLS_AESNI_HAVE_CODE)
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/* With CLMUL support, we need only h, not the rest of the table */
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if (mbedtls_aesni_has_support(MBEDTLS_AESNI_CLMUL)) {
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return 0;
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}
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#endif
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/* 0 corresponds to 0 in GF(2^128) */
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ctx->HH[0] = 0;
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ctx->HL[0] = 0;
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for (i = 4; i > 0; i >>= 1) {
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uint32_t T = (vl & 1) * 0xe1000000U;
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vl = (vh << 63) | (vl >> 1);
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vh = (vh >> 1) ^ ((uint64_t) T << 32);
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ctx->HL[i] = vl;
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ctx->HH[i] = vh;
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}
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for (i = 2; i <= 8; i *= 2) {
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uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i;
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vh = *HiH;
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vl = *HiL;
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for (j = 1; j < i; j++) {
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HiH[j] = vh ^ ctx->HH[j];
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HiL[j] = vl ^ ctx->HL[j];
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}
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}
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return 0;
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}
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int mbedtls_gcm_setkey(mbedtls_gcm_context *ctx,
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mbedtls_cipher_id_t cipher,
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const unsigned char *key,
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unsigned int keybits)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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const mbedtls_cipher_info_t *cipher_info;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(key != NULL);
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GCM_VALIDATE_RET(keybits == 128 || keybits == 192 || keybits == 256);
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cipher_info = mbedtls_cipher_info_from_values(cipher, keybits,
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MBEDTLS_MODE_ECB);
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if (cipher_info == NULL) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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if (cipher_info->block_size != 16) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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mbedtls_cipher_free(&ctx->cipher_ctx);
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if ((ret = mbedtls_cipher_setup(&ctx->cipher_ctx, cipher_info)) != 0) {
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return ret;
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}
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if ((ret = mbedtls_cipher_setkey(&ctx->cipher_ctx, key, keybits,
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MBEDTLS_ENCRYPT)) != 0) {
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return ret;
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}
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if ((ret = gcm_gen_table(ctx)) != 0) {
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return ret;
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}
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return 0;
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}
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/*
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* Shoup's method for multiplication use this table with
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* last4[x] = x times P^128
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* where x and last4[x] are seen as elements of GF(2^128) as in [MGV]
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*/
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static const uint64_t last4[16] =
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{
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0x0000, 0x1c20, 0x3840, 0x2460,
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0x7080, 0x6ca0, 0x48c0, 0x54e0,
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0xe100, 0xfd20, 0xd940, 0xc560,
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0x9180, 0x8da0, 0xa9c0, 0xb5e0
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};
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/*
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* Sets output to x times H using the precomputed tables.
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* x and output are seen as elements of GF(2^128) as in [MGV].
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*/
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static void gcm_mult(mbedtls_gcm_context *ctx, const unsigned char x[16],
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unsigned char output[16])
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{
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int i = 0;
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unsigned char lo, hi, rem;
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uint64_t zh, zl;
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#if defined(MBEDTLS_AESNI_HAVE_CODE)
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if (mbedtls_aesni_has_support(MBEDTLS_AESNI_CLMUL)) {
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unsigned char h[16];
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MBEDTLS_PUT_UINT32_BE(ctx->HH[8] >> 32, h, 0);
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MBEDTLS_PUT_UINT32_BE(ctx->HH[8], h, 4);
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MBEDTLS_PUT_UINT32_BE(ctx->HL[8] >> 32, h, 8);
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MBEDTLS_PUT_UINT32_BE(ctx->HL[8], h, 12);
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mbedtls_aesni_gcm_mult(output, x, h);
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return;
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}
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#endif /* MBEDTLS_AESNI_HAVE_CODE */
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lo = x[15] & 0xf;
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zh = ctx->HH[lo];
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zl = ctx->HL[lo];
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for (i = 15; i >= 0; i--) {
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lo = x[i] & 0xf;
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hi = (x[i] >> 4) & 0xf;
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if (i != 15) {
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rem = (unsigned char) zl & 0xf;
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zl = (zh << 60) | (zl >> 4);
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zh = (zh >> 4);
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zh ^= (uint64_t) last4[rem] << 48;
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zh ^= ctx->HH[lo];
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zl ^= ctx->HL[lo];
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}
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rem = (unsigned char) zl & 0xf;
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zl = (zh << 60) | (zl >> 4);
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zh = (zh >> 4);
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zh ^= (uint64_t) last4[rem] << 48;
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zh ^= ctx->HH[hi];
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zl ^= ctx->HL[hi];
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}
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MBEDTLS_PUT_UINT32_BE(zh >> 32, output, 0);
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MBEDTLS_PUT_UINT32_BE(zh, output, 4);
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MBEDTLS_PUT_UINT32_BE(zl >> 32, output, 8);
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MBEDTLS_PUT_UINT32_BE(zl, output, 12);
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}
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int mbedtls_gcm_starts(mbedtls_gcm_context *ctx,
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int mode,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *add,
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size_t add_len)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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unsigned char work_buf[16];
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size_t i;
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const unsigned char *p;
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size_t use_len, olen = 0;
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uint64_t iv_bits;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(iv_len == 0 || iv != NULL);
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GCM_VALIDATE_RET(add_len == 0 || add != NULL);
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/* IV and AD are limited to 2^64 bits, so 2^61 bytes */
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/* IV is not allowed to be zero length */
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if (iv_len == 0 ||
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((uint64_t) iv_len) >> 61 != 0 ||
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((uint64_t) add_len) >> 61 != 0) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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memset(ctx->y, 0x00, sizeof(ctx->y));
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memset(ctx->buf, 0x00, sizeof(ctx->buf));
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ctx->mode = mode;
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ctx->len = 0;
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ctx->add_len = 0;
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if (iv_len == 12) {
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memcpy(ctx->y, iv, iv_len);
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ctx->y[15] = 1;
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} else {
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memset(work_buf, 0x00, 16);
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iv_bits = (uint64_t) iv_len * 8;
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MBEDTLS_PUT_UINT64_BE(iv_bits, work_buf, 8);
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p = iv;
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while (iv_len > 0) {
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use_len = (iv_len < 16) ? iv_len : 16;
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for (i = 0; i < use_len; i++) {
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ctx->y[i] ^= p[i];
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}
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gcm_mult(ctx, ctx->y, ctx->y);
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iv_len -= use_len;
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p += use_len;
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}
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for (i = 0; i < 16; i++) {
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ctx->y[i] ^= work_buf[i];
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}
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gcm_mult(ctx, ctx->y, ctx->y);
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}
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if ((ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16,
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ctx->base_ectr, &olen)) != 0) {
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return ret;
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}
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ctx->add_len = add_len;
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p = add;
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while (add_len > 0) {
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use_len = (add_len < 16) ? add_len : 16;
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for (i = 0; i < use_len; i++) {
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ctx->buf[i] ^= p[i];
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}
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gcm_mult(ctx, ctx->buf, ctx->buf);
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add_len -= use_len;
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p += use_len;
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}
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return 0;
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}
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int mbedtls_gcm_update(mbedtls_gcm_context *ctx,
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size_t length,
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const unsigned char *input,
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unsigned char *output)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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unsigned char ectr[16];
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size_t i;
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const unsigned char *p;
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unsigned char *out_p = output;
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size_t use_len, olen = 0;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(length == 0 || input != NULL);
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GCM_VALIDATE_RET(length == 0 || output != NULL);
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if (output > input && (size_t) (output - input) < length) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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/* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes
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* Also check for possible overflow */
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if (ctx->len + length < ctx->len ||
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(uint64_t) ctx->len + length > 0xFFFFFFFE0ull) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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ctx->len += length;
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p = input;
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while (length > 0) {
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use_len = (length < 16) ? length : 16;
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for (i = 16; i > 12; i--) {
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if (++ctx->y[i - 1] != 0) {
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break;
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}
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}
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if ((ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16, ectr,
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&olen)) != 0) {
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return ret;
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}
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for (i = 0; i < use_len; i++) {
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if (ctx->mode == MBEDTLS_GCM_DECRYPT) {
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ctx->buf[i] ^= p[i];
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}
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out_p[i] = ectr[i] ^ p[i];
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if (ctx->mode == MBEDTLS_GCM_ENCRYPT) {
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ctx->buf[i] ^= out_p[i];
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}
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}
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gcm_mult(ctx, ctx->buf, ctx->buf);
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length -= use_len;
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p += use_len;
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out_p += use_len;
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}
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return 0;
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}
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int mbedtls_gcm_finish(mbedtls_gcm_context *ctx,
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unsigned char *tag,
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size_t tag_len)
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{
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unsigned char work_buf[16];
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size_t i;
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uint64_t orig_len;
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uint64_t orig_add_len;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(tag != NULL);
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orig_len = ctx->len * 8;
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orig_add_len = ctx->add_len * 8;
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if (tag_len > 16 || tag_len < 4) {
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return MBEDTLS_ERR_GCM_BAD_INPUT;
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}
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memcpy(tag, ctx->base_ectr, tag_len);
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if (orig_len || orig_add_len) {
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memset(work_buf, 0x00, 16);
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MBEDTLS_PUT_UINT32_BE((orig_add_len >> 32), work_buf, 0);
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MBEDTLS_PUT_UINT32_BE((orig_add_len), work_buf, 4);
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MBEDTLS_PUT_UINT32_BE((orig_len >> 32), work_buf, 8);
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MBEDTLS_PUT_UINT32_BE((orig_len), work_buf, 12);
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for (i = 0; i < 16; i++) {
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ctx->buf[i] ^= work_buf[i];
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}
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gcm_mult(ctx, ctx->buf, ctx->buf);
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for (i = 0; i < tag_len; i++) {
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tag[i] ^= ctx->buf[i];
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}
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}
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return 0;
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}
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int mbedtls_gcm_crypt_and_tag(mbedtls_gcm_context *ctx,
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int mode,
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size_t length,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *add,
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size_t add_len,
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const unsigned char *input,
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unsigned char *output,
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size_t tag_len,
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unsigned char *tag)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(iv_len == 0 || iv != NULL);
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GCM_VALIDATE_RET(add_len == 0 || add != NULL);
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GCM_VALIDATE_RET(length == 0 || input != NULL);
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GCM_VALIDATE_RET(length == 0 || output != NULL);
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GCM_VALIDATE_RET(tag != NULL);
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if ((ret = mbedtls_gcm_starts(ctx, mode, iv, iv_len, add, add_len)) != 0) {
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return ret;
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}
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if ((ret = mbedtls_gcm_update(ctx, length, input, output)) != 0) {
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return ret;
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}
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if ((ret = mbedtls_gcm_finish(ctx, tag, tag_len)) != 0) {
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return ret;
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}
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return 0;
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}
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int mbedtls_gcm_auth_decrypt(mbedtls_gcm_context *ctx,
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size_t length,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *add,
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size_t add_len,
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const unsigned char *tag,
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size_t tag_len,
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const unsigned char *input,
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unsigned char *output)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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unsigned char check_tag[16];
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int diff;
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GCM_VALIDATE_RET(ctx != NULL);
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GCM_VALIDATE_RET(iv_len == 0 || iv != NULL);
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GCM_VALIDATE_RET(add_len == 0 || add != NULL);
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GCM_VALIDATE_RET(tag != NULL);
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GCM_VALIDATE_RET(length == 0 || input != NULL);
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GCM_VALIDATE_RET(length == 0 || output != NULL);
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if ((ret = mbedtls_gcm_crypt_and_tag(ctx, MBEDTLS_GCM_DECRYPT, length,
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iv, iv_len, add, add_len,
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input, output, tag_len, check_tag)) != 0) {
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return ret;
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}
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/* Check tag in "constant-time" */
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diff = mbedtls_ct_memcmp(tag, check_tag, tag_len);
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if (diff != 0) {
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mbedtls_platform_zeroize(output, length);
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return MBEDTLS_ERR_GCM_AUTH_FAILED;
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}
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return 0;
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}
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void mbedtls_gcm_free(mbedtls_gcm_context *ctx)
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{
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if (ctx == NULL) {
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return;
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}
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mbedtls_cipher_free(&ctx->cipher_ctx);
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mbedtls_platform_zeroize(ctx, sizeof(mbedtls_gcm_context));
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}
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#endif /* !MBEDTLS_GCM_ALT */
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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/*
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* AES-GCM test vectors from:
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*
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* http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip
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*/
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#define MAX_TESTS 6
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static const int key_index_test_data[MAX_TESTS] =
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{ 0, 0, 1, 1, 1, 1 };
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static const unsigned char key_test_data[MAX_TESTS][32] =
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{
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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{ 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
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0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
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0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
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0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08 },
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};
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static const size_t iv_len_test_data[MAX_TESTS] =
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{ 12, 12, 12, 12, 8, 60 };
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static const int iv_index_test_data[MAX_TESTS] =
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{ 0, 0, 1, 1, 1, 2 };
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static const unsigned char iv_test_data[MAX_TESTS][64] =
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{
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00 },
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{ 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
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0xde, 0xca, 0xf8, 0x88 },
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{ 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
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0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
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0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
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0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
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0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
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0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
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0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
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0xa6, 0x37, 0xb3, 0x9b },
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};
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static const size_t add_len_test_data[MAX_TESTS] =
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{ 0, 0, 0, 20, 20, 20 };
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static const int add_index_test_data[MAX_TESTS] =
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{ 0, 0, 0, 1, 1, 1 };
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static const unsigned char additional_test_data[MAX_TESTS][64] =
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{
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{ 0x00 },
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{ 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
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0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
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0xab, 0xad, 0xda, 0xd2 },
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};
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static const size_t pt_len_test_data[MAX_TESTS] =
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{ 0, 16, 64, 60, 60, 60 };
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static const int pt_index_test_data[MAX_TESTS] =
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{ 0, 0, 1, 1, 1, 1 };
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static const unsigned char pt_test_data[MAX_TESTS][64] =
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{
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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{ 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
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0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
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0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
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0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
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0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
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0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
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0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
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0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55 },
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};
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static const unsigned char ct_test_data[MAX_TESTS * 3][64] =
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{
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{ 0x00 },
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{ 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
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0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 },
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{ 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
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0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
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0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
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0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
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0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
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0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
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0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
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0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85 },
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{ 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
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0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
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0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
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0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
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0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
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0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
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0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
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0x3d, 0x58, 0xe0, 0x91 },
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{ 0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a,
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0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55,
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0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8,
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0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23,
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0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2,
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0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42,
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0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07,
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0xc2, 0x3f, 0x45, 0x98 },
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{ 0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6,
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0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94,
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0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8,
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0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7,
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0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90,
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0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f,
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0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03,
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0x4c, 0x34, 0xae, 0xe5 },
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{ 0x00 },
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{ 0x98, 0xe7, 0x24, 0x7c, 0x07, 0xf0, 0xfe, 0x41,
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0x1c, 0x26, 0x7e, 0x43, 0x84, 0xb0, 0xf6, 0x00 },
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{ 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
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0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
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0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
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0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
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0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
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0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
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0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
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0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56 },
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{ 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
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0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
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0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
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0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
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0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
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0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
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0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
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0xcc, 0xda, 0x27, 0x10 },
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{ 0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54,
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0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, 0x4d, 0xb8,
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0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f,
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0x83, 0x47, 0x28, 0x0f, 0xc4, 0x50, 0x70, 0x57,
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0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75,
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0xc6, 0x65, 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9,
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0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f,
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0xa0, 0xf0, 0x62, 0xf7 },
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{ 0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c,
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0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, 0xf9, 0xff,
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0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef,
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0x6e, 0xf7, 0xb7, 0x98, 0x28, 0x66, 0x6e, 0x45,
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0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9,
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0xe2, 0xf0, 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3,
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0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7,
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0xe9, 0xb7, 0x37, 0x3b },
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{ 0x00 },
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{ 0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e,
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0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18 },
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{ 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
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0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
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0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
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0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
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0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
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0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
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0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
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0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad },
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{ 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
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0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
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0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
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0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
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0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
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0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
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0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
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0xbc, 0xc9, 0xf6, 0x62 },
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{ 0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32,
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0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, 0x44, 0xcb,
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0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa,
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0xc5, 0x2f, 0xf7, 0xd7, 0x9b, 0xba, 0x9d, 0xe0,
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0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0,
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0x95, 0x4c, 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78,
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0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99,
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0xf4, 0x7c, 0x9b, 0x1f },
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{ 0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1,
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0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, 0x2a, 0x20,
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0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19,
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0xa0, 0x58, 0xab, 0x4f, 0x6f, 0x74, 0x6b, 0xf4,
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0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45,
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0x2d, 0xa3, 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde,
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0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e,
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0x44, 0xae, 0x7e, 0x3f },
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};
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static const unsigned char tag_test_data[MAX_TESTS * 3][16] =
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{
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{ 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
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0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a },
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{ 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
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0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf },
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{ 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
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0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4 },
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{ 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
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0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47 },
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{ 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
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0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb },
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{ 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
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0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50 },
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{ 0xcd, 0x33, 0xb2, 0x8a, 0xc7, 0x73, 0xf7, 0x4b,
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0xa0, 0x0e, 0xd1, 0xf3, 0x12, 0x57, 0x24, 0x35 },
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{ 0x2f, 0xf5, 0x8d, 0x80, 0x03, 0x39, 0x27, 0xab,
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0x8e, 0xf4, 0xd4, 0x58, 0x75, 0x14, 0xf0, 0xfb },
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{ 0x99, 0x24, 0xa7, 0xc8, 0x58, 0x73, 0x36, 0xbf,
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0xb1, 0x18, 0x02, 0x4d, 0xb8, 0x67, 0x4a, 0x14 },
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{ 0x25, 0x19, 0x49, 0x8e, 0x80, 0xf1, 0x47, 0x8f,
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0x37, 0xba, 0x55, 0xbd, 0x6d, 0x27, 0x61, 0x8c },
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{ 0x65, 0xdc, 0xc5, 0x7f, 0xcf, 0x62, 0x3a, 0x24,
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0x09, 0x4f, 0xcc, 0xa4, 0x0d, 0x35, 0x33, 0xf8 },
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{ 0xdc, 0xf5, 0x66, 0xff, 0x29, 0x1c, 0x25, 0xbb,
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0xb8, 0x56, 0x8f, 0xc3, 0xd3, 0x76, 0xa6, 0xd9 },
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{ 0x53, 0x0f, 0x8a, 0xfb, 0xc7, 0x45, 0x36, 0xb9,
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0xa9, 0x63, 0xb4, 0xf1, 0xc4, 0xcb, 0x73, 0x8b },
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{ 0xd0, 0xd1, 0xc8, 0xa7, 0x99, 0x99, 0x6b, 0xf0,
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0x26, 0x5b, 0x98, 0xb5, 0xd4, 0x8a, 0xb9, 0x19 },
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{ 0xb0, 0x94, 0xda, 0xc5, 0xd9, 0x34, 0x71, 0xbd,
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0xec, 0x1a, 0x50, 0x22, 0x70, 0xe3, 0xcc, 0x6c },
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{ 0x76, 0xfc, 0x6e, 0xce, 0x0f, 0x4e, 0x17, 0x68,
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0xcd, 0xdf, 0x88, 0x53, 0xbb, 0x2d, 0x55, 0x1b },
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{ 0x3a, 0x33, 0x7d, 0xbf, 0x46, 0xa7, 0x92, 0xc4,
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0x5e, 0x45, 0x49, 0x13, 0xfe, 0x2e, 0xa8, 0xf2 },
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{ 0xa4, 0x4a, 0x82, 0x66, 0xee, 0x1c, 0x8e, 0xb0,
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0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a },
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};
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int mbedtls_gcm_self_test(int verbose)
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{
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mbedtls_gcm_context ctx;
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unsigned char buf[64];
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unsigned char tag_buf[16];
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int i, j, ret;
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mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES;
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if (verbose != 0) {
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#if defined(MBEDTLS_GCM_ALT)
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mbedtls_printf(" GCM note: alternative implementation.\n");
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#else /* MBEDTLS_GCM_ALT */
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#if defined(MBEDTLS_AESNI_HAVE_CODE)
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if (mbedtls_aesni_has_support(MBEDTLS_AESNI_CLMUL)) {
|
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mbedtls_printf(" GCM note: using AESNI via ");
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#if MBEDTLS_AESNI_HAVE_CODE == 1
|
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mbedtls_printf("assembly");
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#elif MBEDTLS_AESNI_HAVE_CODE == 2
|
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mbedtls_printf("intrinsics");
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#else
|
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mbedtls_printf("(unknown)");
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#endif
|
|
mbedtls_printf(".\n");
|
|
} else
|
|
#endif
|
|
mbedtls_printf(" GCM note: built-in implementation.\n");
|
|
#endif /* MBEDTLS_GCM_ALT */
|
|
}
|
|
|
|
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_test_data[key_index_test_data[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_PLATFORM_FEATURE_UNSUPPORTED && 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_test_data[i],
|
|
iv_test_data[iv_index_test_data[i]],
|
|
iv_len_test_data[i],
|
|
additional_test_data[add_index_test_data[i]],
|
|
add_len_test_data[i],
|
|
pt_test_data[pt_index_test_data[i]],
|
|
buf, 16, tag_buf);
|
|
#if defined(MBEDTLS_GCM_ALT)
|
|
/* Allow alternative implementations to only support 12-byte nonces. */
|
|
if (ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED &&
|
|
iv_len_test_data[i] != 12) {
|
|
mbedtls_printf("skipped\n");
|
|
break;
|
|
}
|
|
#endif /* defined(MBEDTLS_GCM_ALT) */
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
if (memcmp(buf, ct_test_data[j * 6 + i],
|
|
pt_len_test_data[i]) != 0 ||
|
|
memcmp(tag_buf, tag_test_data[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_test_data[key_index_test_data[i]],
|
|
key_len);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
ret = mbedtls_gcm_crypt_and_tag(&ctx, MBEDTLS_GCM_DECRYPT,
|
|
pt_len_test_data[i],
|
|
iv_test_data[iv_index_test_data[i]],
|
|
iv_len_test_data[i],
|
|
additional_test_data[add_index_test_data[i]],
|
|
add_len_test_data[i],
|
|
ct_test_data[j * 6 + i], buf, 16, tag_buf);
|
|
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
if (memcmp(buf, pt_test_data[pt_index_test_data[i]],
|
|
pt_len_test_data[i]) != 0 ||
|
|
memcmp(tag_buf, tag_test_data[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_test_data[key_index_test_data[i]],
|
|
key_len);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
ret = mbedtls_gcm_starts(&ctx, MBEDTLS_GCM_ENCRYPT,
|
|
iv_test_data[iv_index_test_data[i]],
|
|
iv_len_test_data[i],
|
|
additional_test_data[add_index_test_data[i]],
|
|
add_len_test_data[i]);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
if (pt_len_test_data[i] > 32) {
|
|
size_t rest_len = pt_len_test_data[i] - 32;
|
|
ret = mbedtls_gcm_update(&ctx, 32,
|
|
pt_test_data[pt_index_test_data[i]],
|
|
buf);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
ret = mbedtls_gcm_update(&ctx, rest_len,
|
|
pt_test_data[pt_index_test_data[i]] + 32,
|
|
buf + 32);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
} else {
|
|
ret = mbedtls_gcm_update(&ctx, pt_len_test_data[i],
|
|
pt_test_data[pt_index_test_data[i]],
|
|
buf);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
ret = mbedtls_gcm_finish(&ctx, tag_buf, 16);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
if (memcmp(buf, ct_test_data[j * 6 + i],
|
|
pt_len_test_data[i]) != 0 ||
|
|
memcmp(tag_buf, tag_test_data[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_test_data[key_index_test_data[i]],
|
|
key_len);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
ret = mbedtls_gcm_starts(&ctx, MBEDTLS_GCM_DECRYPT,
|
|
iv_test_data[iv_index_test_data[i]],
|
|
iv_len_test_data[i],
|
|
additional_test_data[add_index_test_data[i]],
|
|
add_len_test_data[i]);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
if (pt_len_test_data[i] > 32) {
|
|
size_t rest_len = pt_len_test_data[i] - 32;
|
|
ret = mbedtls_gcm_update(&ctx, 32, ct_test_data[j * 6 + i],
|
|
buf);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
|
|
ret = mbedtls_gcm_update(&ctx, rest_len,
|
|
ct_test_data[j * 6 + i] + 32,
|
|
buf + 32);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
} else {
|
|
ret = mbedtls_gcm_update(&ctx, pt_len_test_data[i],
|
|
ct_test_data[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_test_data[pt_index_test_data[i]],
|
|
pt_len_test_data[i]) != 0 ||
|
|
memcmp(tag_buf, tag_test_data[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 */
|