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Diffstat (limited to '')
-rw-r--r-- | src/crypto/isa-l/isa-l_crypto/aes/gcm_simple_example.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/crypto/isa-l/isa-l_crypto/aes/gcm_simple_example.c b/src/crypto/isa-l/isa-l_crypto/aes/gcm_simple_example.c new file mode 100644 index 000000000..4b7ca9736 --- /dev/null +++ b/src/crypto/isa-l/isa-l_crypto/aes/gcm_simple_example.c @@ -0,0 +1,78 @@ +/********************************************************************** + Copyright(c) 2011-2017 Intel Corporation All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + * Neither the name of Intel Corporation nor the names of its + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +**********************************************************************/ + +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include "aes_gcm.h" + +#define TXT_SIZE 8 +#define AAD_SIZE 32 +#define TAG_SIZE 16 /* Valid values are 16, 12, or 8 */ +#define KEY_SIZE GCM_256_KEY_LEN +#define IV_SIZE GCM_IV_DATA_LEN + +void mprint(const char *msg, uint8_t * buf, int len) +{ + int i; + printf("%s", msg); + for (i = 0; i < len;) { + printf(" %2x", 0xff & buf[i++]); + if (i % 32 == 0) + printf("\n"); + } + printf("\n"); +} + +int main(void) +{ + struct gcm_key_data gkey; + struct gcm_context_data gctx; + uint8_t ct[TXT_SIZE], pt[TXT_SIZE], pt2[TXT_SIZE]; // Cipher text and plain text + uint8_t iv[IV_SIZE], aad[AAD_SIZE], key[KEY_SIZE]; // Key and authentication data + uint8_t tag1[TAG_SIZE], tag2[TAG_SIZE]; // Authentication tags for encode and decode + + printf("gcm example:\n"); + memset(key, 0, KEY_SIZE); + memset(pt, 0, TXT_SIZE); + memset(iv, 0, IV_SIZE); + memset(aad, 0, AAD_SIZE); + + aes_gcm_pre_256(key, &gkey); + aes_gcm_enc_256(&gkey, &gctx, ct, pt, TXT_SIZE, iv, aad, AAD_SIZE, tag1, TAG_SIZE); + aes_gcm_dec_256(&gkey, &gctx, pt2, ct, TXT_SIZE, iv, aad, AAD_SIZE, tag2, TAG_SIZE); + + mprint(" input text: ", pt, TXT_SIZE); + mprint(" cipher text: ", ct, TXT_SIZE); + mprint(" decode text: ", pt2, TXT_SIZE); + mprint(" ath tag1 (enc): ", tag1, TAG_SIZE); + mprint(" ath tag2 (dec): ", tag2, TAG_SIZE); + + return memcmp(tag1, tag2, TAG_SIZE); +} |