Hannes Tschofenig
Example program to test AES-GCM functionality. Used for a workshop
Diff: SSL/library/gcm.c
- Revision:
- 0:796d0f61a05b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SSL/library/gcm.c Thu Sep 27 06:34:22 2018 +0000
@@ -0,0 +1,931 @@
+/*
+ * NIST SP800-38D compliant GCM implementation
+ *
+ * Copyright (C) 2006-2014, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * 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(POLARSSL_CONFIG_FILE)
+#include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
+
+#if defined(POLARSSL_GCM_C)
+
+#include "polarssl/gcm.h"
+
+#if defined(POLARSSL_AESNI_C)
+#include "polarssl/aesni.h"
+#endif
+
+#if defined(POLARSSL_PLATFORM_C)
+#include "polarssl/platform.h"
+#else
+#define polarssl_printf printf
+#endif
+
+/*
+ * 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
+
+/*
+ * 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( 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 = 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(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
+ /* With CLMUL support, we need only h, not the rest of the table */
+ if( aesni_supports( POLARSSL_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 < 16; i <<= 1 )
+ {
+ 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 gcm_init( gcm_context *ctx, cipher_id_t cipher, const unsigned char *key,
+ unsigned int keysize )
+{
+ int ret;
+ const cipher_info_t *cipher_info;
+
+ memset( ctx, 0, sizeof(gcm_context) );
+
+ cipher_info = cipher_info_from_values( cipher, keysize, POLARSSL_MODE_ECB );
+ if( cipher_info == NULL )
+ return( POLARSSL_ERR_GCM_BAD_INPUT );
+
+ if( cipher_info->block_size != 16 )
+ return( POLARSSL_ERR_GCM_BAD_INPUT );
+
+ if( ( ret = cipher_init_ctx( &ctx->cipher_ctx, cipher_info ) ) != 0 )
+ return( ret );
+
+ if( ( ret = cipher_setkey( &ctx->cipher_ctx, key, keysize,
+ POLARSSL_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( gcm_context *ctx, const unsigned char x[16],
+ unsigned char output[16] )
+{
+ int i = 0;
+ unsigned char z[16];
+ unsigned char lo, hi, rem;
+ uint64_t zh, zl;
+
+#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
+ if( aesni_supports( POLARSSL_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 );
+
+ aesni_gcm_mult( output, x, h );
+ return;
+ }
+#endif /* POLARSSL_AESNI_C && POLARSSL_HAVE_X86_64 */
+
+ memset( z, 0x00, 16 );
+
+ lo = x[15] & 0xf;
+ hi = x[15] >> 4;
+
+ 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 gcm_starts( 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;
+
+ 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 = 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 gcm_update( 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( POLARSSL_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 = cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
+ &olen ) ) != 0 )
+ {
+ return( ret );
+ }
+
+ for( i = 0; i < use_len; i++ )
+ {
+ if( ctx->mode == GCM_DECRYPT )
+ ctx->buf[i] ^= p[i];
+ out_p[i] = ectr[i] ^ p[i];
+ if( ctx->mode == 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 gcm_finish( 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 )
+ return( POLARSSL_ERR_GCM_BAD_INPUT );
+
+ if( tag_len != 0 )
+ 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 gcm_crypt_and_tag( 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 = gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
+ return( ret );
+
+ if( ( ret = gcm_update( ctx, length, input, output ) ) != 0 )
+ return( ret );
+
+ if( ( ret = gcm_finish( ctx, tag, tag_len ) ) != 0 )
+ return( ret );
+
+ return( 0 );
+}
+
+int gcm_auth_decrypt( 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 = gcm_crypt_and_tag( ctx, 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 )
+ {
+ memset( output, 0, length );
+ return( POLARSSL_ERR_GCM_AUTH_FAILED );
+ }
+
+ return( 0 );
+}
+
+void gcm_free( gcm_context *ctx )
+{
+ (void) cipher_free_ctx( &ctx->cipher_ctx );
+ memset( ctx, 0, sizeof( gcm_context ) );
+}
+
+#if defined(POLARSSL_SELF_TEST) && defined(POLARSSL_AES_C)
+
+#include <stdio.h>
+
+/*
+ * AES-GCM test vectors from:
+ *
+ * http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip
+ */
+#define MAX_TESTS 6
+
+int key_index[MAX_TESTS] =
+ { 0, 0, 1, 1, 1, 1 };
+
+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 },
+};
+
+size_t iv_len[MAX_TESTS] =
+ { 12, 12, 12, 12, 8, 60 };
+
+int iv_index[MAX_TESTS] =
+ { 0, 0, 1, 1, 1, 2 };
+
+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 },
+};
+
+size_t add_len[MAX_TESTS] =
+ { 0, 0, 0, 20, 20, 20 };
+
+int add_index[MAX_TESTS] =
+ { 0, 0, 0, 1, 1, 1 };
+
+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 },
+};
+
+size_t pt_len[MAX_TESTS] =
+ { 0, 16, 64, 60, 60, 60 };
+
+int pt_index[MAX_TESTS] =
+ { 0, 0, 1, 1, 1, 1 };
+
+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 },
+};
+
+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 },
+};
+
+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 gcm_self_test( int verbose )
+{
+ gcm_context ctx;
+ unsigned char buf[64];
+ unsigned char tag_buf[16];
+ int i, j, ret;
+ cipher_id_t cipher = POLARSSL_CIPHER_ID_AES;
+
+ for( j = 0; j < 3; j++ )
+ {
+ int key_len = 128 + 64 * j;
+
+ for( i = 0; i < MAX_TESTS; i++ )
+ {
+ if( verbose != 0 )
+ polarssl_printf( " AES-GCM-%3d #%d (%s): ",
+ key_len, i, "enc" );
+
+ gcm_init( &ctx, cipher, key[key_index[i]], key_len );
+
+ ret = gcm_crypt_and_tag( &ctx, 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 ||
+ memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
+ memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ gcm_free( &ctx );
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+
+ if( verbose != 0 )
+ polarssl_printf( " AES-GCM-%3d #%d (%s): ",
+ key_len, i, "dec" );
+
+ gcm_init( &ctx, cipher, key[key_index[i]], key_len );
+
+ ret = gcm_crypt_and_tag( &ctx, 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 ||
+ memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
+ memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ gcm_free( &ctx );
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+
+ if( verbose != 0 )
+ polarssl_printf( " AES-GCM-%3d #%d split (%s): ",
+ key_len, i, "enc" );
+
+ gcm_init( &ctx, cipher, key[key_index[i]], key_len );
+
+ ret = gcm_starts( &ctx, GCM_ENCRYPT,
+ iv[iv_index[i]], iv_len[i],
+ additional[add_index[i]], add_len[i] );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( pt_len[i] > 32 )
+ {
+ size_t rest_len = pt_len[i] - 32;
+ ret = gcm_update( &ctx, 32, pt[pt_index[i]], buf );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ ret = gcm_update( &ctx, rest_len, pt[pt_index[i]] + 32,
+ buf + 32 );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+ }
+ else
+ {
+ ret = gcm_update( &ctx, pt_len[i], pt[pt_index[i]], buf );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+ }
+
+ ret = gcm_finish( &ctx, tag_buf, 16 );
+ if( ret != 0 ||
+ memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
+ memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ gcm_free( &ctx );
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+
+ if( verbose != 0 )
+ polarssl_printf( " AES-GCM-%3d #%d split (%s): ",
+ key_len, i, "dec" );
+
+ gcm_init( &ctx, cipher, key[key_index[i]], key_len );
+
+ ret = gcm_starts( &ctx, GCM_DECRYPT,
+ iv[iv_index[i]], iv_len[i],
+ additional[add_index[i]], add_len[i] );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( pt_len[i] > 32 )
+ {
+ size_t rest_len = pt_len[i] - 32;
+ ret = gcm_update( &ctx, 32, ct[j * 6 + i], buf );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ ret = gcm_update( &ctx, rest_len, ct[j * 6 + i] + 32,
+ buf + 32 );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+ }
+ else
+ {
+ ret = gcm_update( &ctx, pt_len[i], ct[j * 6 + i], buf );
+ if( ret != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+ }
+
+ ret = gcm_finish( &ctx, tag_buf, 16 );
+ if( ret != 0 ||
+ memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
+ memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
+ {
+ if( verbose != 0 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ gcm_free( &ctx );
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+
+ }
+ }
+
+ if( verbose != 0 )
+ polarssl_printf( "\n" );
+
+ return( 0 );
+}
+
+
+
+#endif /* POLARSSL_SELF_TEST && POLARSSL_AES_C */
+
+#endif /* POLARSSL_GCM_C */
+
+