int ccm_test( void )
{
unsigned long taglen, x;
unsigned char buf[64], buf2[64], tag2[16], tag[16];
int stat;
for( x = 0; x < (sizeof(tests) / sizeof(tests[0])); x++ )
{
taglen = tests[x].taglen;
ccm_memory( tests[x].key, 16, tests[x].nonce, tests[x].noncelen, tests[x].header,
tests[x].headerlen, (unsigned char *)tests[x].pt, tests[x].ptlen, buf,
tag, taglen, 0, 0);
if( memcmp(buf, tests[x].ct, tests[x].ptlen) )
goto error;
if( memcmp(tag, tests[x].tag, tests[x].taglen) )
goto error;
ccm_memory( tests[x].key, 16, tests[x].nonce, tests[x].noncelen, tests[x].header,
tests[x].headerlen, buf2, tests[x].ptlen, buf,
tag, taglen, 1 , &stat );
if( memcmp(buf2, tests[x].pt, tests[x].ptlen) )
goto error;
if( stat == RETURN_ERROR )
goto error;
}
printf( "\nOK\n" );
return RETURN_OK;
error: printf( "\nerror\n" );
return RETURN_ERROR;
}
SCLError CCM_Decrypt(uint8_t *key, size_t keyLen,
uint8_t *seq, size_t seqLen,
uint8_t *in, size_t inLen,
uint8_t *tag, size_t tagSize,
uint8_t **outData, size_t *outSize)
{
SCLError err = kSCLError_NoErr;
int status = CRYPT_OK;
uint8_t *buffer = NULL;
size_t buffLen = inLen;
int IVlen = keyLen >>1;
uint8_t bytes2Pad = 0;
unsigned char T[32];
unsigned long tagLen = sizeof(T);
buffer = XMALLOC(buffLen);
status = ccm_memory(find_cipher("aes"),
key, IVlen ,
NULL,
key+ IVlen, IVlen,
seq, seqLen,
buffer, buffLen,
in,
T, &tagLen ,
CCM_DECRYPT);CKSTAT;
// This will only compare as many bytes of the tag as you specify in tagSize
// we need to be careful with CCM to not leak key information, an easy way to do
// that is to only export half the hash.
if((memcmp(T,tag,tagSize) != 0))
RETERR(kSCLError_CorruptData);
bytes2Pad = *(buffer+buffLen-1);
*outData = buffer;
*outSize = buffLen- bytes2Pad;
done:
if(status != CRYPT_OK || err != kSCLError_NoErr)
{
if(buffer)
{
memset(buffer, buffLen, 0);
XFREE(buffer);
}
err = IsSCLError(err)?err:sCrypt2SCLError(status);
}
return err;
}
SCLError CCM_Encrypt(uint8_t *key, size_t keyLen,
uint8_t *seq, size_t seqLen,
const uint8_t *in, size_t inLen,
uint8_t **outData, size_t *outSize,
uint8_t *outTag, size_t tagSize)
{
SCLError err = kSCLError_NoErr;
int status = CRYPT_OK;
uint8_t bytes2Pad;
uint8_t *buffer = NULL;
size_t buffLen = 0;
int IVlen = keyLen >>1;
unsigned char T[32];
unsigned long tagLen = 0;
unsigned long tag2Copy = tagSize;
ValidateParam (tagSize <= sizeof(T));
/* calclulate Pad byte */
if(inLen < MIN_MSG_BLOCKSIZE)
{
bytes2Pad = MIN_MSG_BLOCKSIZE - inLen;
}
else
{
bytes2Pad = roundup(inLen, MSG_BLOCKSIZE) + MSG_BLOCKSIZE - inLen;
};
buffLen = inLen + bytes2Pad;
buffer = XMALLOC(buffLen);
memcpy(buffer, in, inLen);
memset(buffer+inLen, bytes2Pad, bytes2Pad);
tagLen = sizeof(T);
status = ccm_memory(find_cipher("aes"),
key, IVlen ,
NULL,
key+ IVlen, IVlen,
seq, seqLen,
buffer, buffLen,
buffer,
T, &tagLen ,
CCM_ENCRYPT); CKSTAT;
*outData = buffer;
*outSize = buffLen;
memcpy(outTag, T, tag2Copy);
done:
if(status != CRYPT_OK)
{
if(buffer)
{
memset(buffer, buffLen, 0);
XFREE(buffer);
}
err = sCrypt2SCLError(status);
}
return err;
}
TEE_Result tee_authenc_dec_final(
void *ctx, uint32_t algo, const uint8_t *src_data,
size_t src_len, uint8_t *dst_data, const uint8_t *tag, size_t tag_len)
{
TEE_Result res = TEE_ERROR_BAD_STATE;
struct tee_ccm_state *ccm;
struct tee_gcm_state *gcm;
int ltc_res;
uint8_t dst_tag[TEE_xCM_TAG_MAX_LENGTH];
size_t dst_len, init_len;
unsigned long ltc_tag_len = tag_len;
res = tee_cipher_get_block_size(algo, &dst_len);
if (res != TEE_SUCCESS)
return res;
if (tag_len == 0)
return TEE_ERROR_SHORT_BUFFER;
if (tag_len > TEE_xCM_TAG_MAX_LENGTH)
return TEE_ERROR_BAD_STATE;
switch (algo) {
case TEE_ALG_AES_CCM:
ccm = ctx;
init_len = ccm->current_payload_len;
if (src_len) {
memcpy(ccm->payload + ccm->current_payload_len,
src_data, src_len);
ccm->current_payload_len += src_len;
}
if (ccm->payload_len != ccm->current_payload_len)
return TEE_ERROR_BAD_PARAMETERS;
ltc_res = ccm_memory(
ccm->ltc_cipherindex,
ccm->key, ccm->key_len,
0, /* not previously scheduled */
ccm->nonce, ccm->nonce_len,
ccm->header, ccm->header_len,
ccm->res_payload,
ccm->current_payload_len, ccm->payload,
dst_tag, <c_tag_len, CCM_DECRYPT);
if (ltc_res != CRYPT_OK)
return TEE_ERROR_BAD_STATE;
if (src_len)
memcpy(dst_data, ccm->res_payload + init_len, src_len);
break;
case TEE_ALG_AES_GCM:
/* Process the last buffer, if any */
gcm = ctx;
res = tee_authenc_update_payload(
&gcm->ctx, algo, TEE_MODE_DECRYPT,
src_data, src_len, dst_data);
if (res != TEE_SUCCESS)
return res;
/* Finalize the authentication */
ltc_res = gcm_done(&gcm->ctx, dst_tag, <c_tag_len);
if (ltc_res != CRYPT_OK)
return TEE_ERROR_BAD_STATE;
break;
default:
return TEE_ERROR_NOT_SUPPORTED;
}
if (buf_compare_ct(dst_tag, tag, tag_len) != 0)
res = TEE_ERROR_MAC_INVALID;
else
res = TEE_SUCCESS;
return res;
}
TEE_Result tee_authenc_enc_final(
void *ctx, uint32_t algo, const uint8_t *src_data,
size_t src_len, uint8_t *dst_data,
uint8_t *dst_tag, size_t *dst_tag_len)
{
TEE_Result res, final_res = TEE_ERROR_MAC_INVALID;
struct tee_ccm_state *ccm;
struct tee_gcm_state *gcm;
size_t digest_size;
int ltc_res;
int init_len;
/* Check the resulting buffer is not too short */
res = tee_cipher_get_block_size(algo, &digest_size);
if (res != TEE_SUCCESS) {
final_res = res;
goto out;
}
switch (algo) {
case TEE_ALG_AES_CCM:
ccm = ctx;
init_len = ccm->current_payload_len;
if (src_len) {
memcpy(ccm->payload + ccm->current_payload_len,
src_data, src_len);
ccm->current_payload_len += src_len;
}
if (ccm->payload_len != ccm->current_payload_len)
return TEE_ERROR_BAD_PARAMETERS;
if (*dst_tag_len < ccm->tag_len) {
*dst_tag_len = ccm->tag_len;
return TEE_ERROR_SHORT_BUFFER;
}
*dst_tag_len = ccm->tag_len;
ltc_res = ccm_memory(
ccm->ltc_cipherindex,
ccm->key, ccm->key_len,
0, /* not previously scheduled */
ccm->nonce, ccm->nonce_len,
ccm->header, ccm->header_len,
ccm->payload, ccm->current_payload_len,
ccm->res_payload,
dst_tag, (unsigned long *)dst_tag_len, CCM_ENCRYPT);
if (ltc_res != CRYPT_OK)
return TEE_ERROR_BAD_STATE;
if (src_len)
memcpy(dst_data, ccm->res_payload + init_len, src_len);
break;
case TEE_ALG_AES_GCM:
/* Finalize the remaining buffer */
gcm = ctx;
res = tee_authenc_update_payload(
&gcm->ctx, algo, TEE_MODE_ENCRYPT,
src_data, src_len, dst_data);
if (res != TEE_SUCCESS) {
final_res = res;
goto out;
}
if (*dst_tag_len < gcm->tag_len) {
*dst_tag_len = gcm->tag_len;
return TEE_ERROR_SHORT_BUFFER;
}
*dst_tag_len = gcm->tag_len;
/* Process the last buffer, if any */
ltc_res = gcm_done(
&gcm->ctx,
dst_tag, (unsigned long *)dst_tag_len);
if (ltc_res != CRYPT_OK)
goto out;
break;
default:
return TEE_ERROR_NOT_SUPPORTED;
}
final_res = TEE_SUCCESS;
out:
return final_res;
}
TEE_Result tee_authenc_update_payload(
void *ctx, uint32_t algo, TEE_OperationMode mode,
const uint8_t *src_data, size_t src_len, uint8_t *dst_data)
{
TEE_Result res;
int ltc_res, dir;
struct tee_ccm_state *ccm;
struct tee_gcm_state *gcm;
unsigned char *pt, *ct; /* the plain and the cipher text */
if (mode == TEE_MODE_ENCRYPT) {
pt = (unsigned char *)src_data;
ct = dst_data;
} else {
pt = dst_data;
ct = (unsigned char *)src_data;
}
switch (algo) {
case TEE_ALG_AES_CCM:
/* Check aad has been correctly added */
ccm = ctx;
if (ccm->aad_len != ccm->header_len)
return TEE_ERROR_BAD_STATE;
/*
* check we do not add more data than what was defined at
* the init
*/
if (ccm->current_payload_len + src_len > ccm->payload_len)
return TEE_ERROR_BAD_PARAMETERS;
memcpy(ccm->payload + ccm->current_payload_len,
src_data, src_len);
ccm->current_payload_len += src_len;
dir = (mode == TEE_MODE_ENCRYPT ? CCM_ENCRYPT : CCM_DECRYPT);
ltc_res = ccm_memory(
ccm->ltc_cipherindex,
ccm->key, ccm->key_len,
0, /* not presecheduled */
ccm->nonce, ccm->nonce_len,
ccm->header, ccm->header_len,
pt, src_len, ct,
ccm->tag, &ccm->tag_len, dir);
if (ltc_res != CRYPT_OK)
return TEE_ERROR_BAD_STATE;
break;
case TEE_ALG_AES_GCM:
/* aad is optional ==> add one without length */
gcm = ctx;
if (gcm->ctx.mode == LTC_GCM_MODE_IV) {
res = tee_authenc_update_aad(
&gcm->ctx, algo, mode, 0, 0);
if (res != TEE_SUCCESS)
return res;
}
/* process the data */
dir = (mode == TEE_MODE_ENCRYPT ? GCM_ENCRYPT : GCM_DECRYPT);
ltc_res = gcm_process(&gcm->ctx, pt, src_len, ct, dir);
if (ltc_res != CRYPT_OK)
return TEE_ERROR_BAD_STATE;
break;
default:
return TEE_ERROR_NOT_SUPPORTED;
}
return TEE_SUCCESS;
}
void ccm_gen(void)
{
int err, kl, x, y1, z;
FILE *out;
unsigned char key[MAXBLOCKSIZE], nonce[MAXBLOCKSIZE*2],
plaintext[MAXBLOCKSIZE*2], tag[MAXBLOCKSIZE];
unsigned long len;
out = fopen("ccm_tv.txt", "w");
fprintf(out, "CCM Test Vectors. Uses the 00010203...NN-1 pattern for nonce/header/plaintext/key. The outputs\n"
"are of the form ciphertext,tag for a given NN. The key for step N>1 is the tag of the previous\n"
"step repeated sufficiently. The nonce is fixed throughout at 13 bytes 000102...\n\n");
for (x = 0; cipher_descriptor[x].name != NULL; x++) {
kl = cipher_descriptor[x].block_length;
/* skip ciphers which do not have 128 bit block sizes */
if (kl != 16) continue;
if (cipher_descriptor[x].keysize(&kl) != CRYPT_OK) {
kl = cipher_descriptor[x].max_key_length;
}
fprintf(out, "CCM-%s (%d byte key)\n", cipher_descriptor[x].name, kl);
/* the key */
for (z = 0; z < kl; z++) {
key[z] = (z & 255);
}
/* fixed nonce */
for (z = 0; z < cipher_descriptor[x].block_length; z++) {
nonce[z] = z;
}
for (y1 = 0; y1 <= (int)(cipher_descriptor[x].block_length*2); y1++){
for (z = 0; z < y1; z++) {
plaintext[z] = (unsigned char)(z & 255);
}
len = sizeof(tag);
if ((err = ccm_memory(x, key, kl, nonce, 13, plaintext, y1, plaintext, y1, plaintext, tag, &len, CCM_ENCRYPT)) != CRYPT_OK) {
printf("Error CCM'ing: %s\n", error_to_string(err));
exit(EXIT_FAILURE);
}
fprintf(out, "%3d: ", y1);
for (z = 0; z < y1; z++) {
fprintf(out, "%02X", plaintext[z]);
}
fprintf(out, ", ");
for (z = 0; z <(int)len; z++) {
fprintf(out, "%02X", tag[z]);
}
fprintf(out, "\n");
/* forward the key */
for (z = 0; z < kl; z++) {
key[z] = tag[z % len];
}
}
fprintf(out, "\n");
}
fclose(out);
}
int ccm_test(void)
{
#ifndef LTC_TEST
return CRYPT_NOP;
#else
static const struct {
unsigned char key[16];
unsigned char nonce[16];
int noncelen;
unsigned char header[64];
int headerlen;
unsigned char pt[64];
int ptlen;
unsigned char ct[64];
unsigned char tag[16];
unsigned long taglen;
} tests[] = {
/* 13 byte nonce, 8 byte auth, 23 byte pt */
{
{ 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF },
{ 0x00, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00, 0xA0,
0xA1, 0xA2, 0xA3, 0xA4, 0xA5 },
13,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 },
8,
{ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E },
23,
{ 0x58, 0x8C, 0x97, 0x9A, 0x61, 0xC6, 0x63, 0xD2,
0xF0, 0x66, 0xD0, 0xC2, 0xC0, 0xF9, 0x89, 0x80,
0x6D, 0x5F, 0x6B, 0x61, 0xDA, 0xC3, 0x84 },
{ 0x17, 0xe8, 0xd1, 0x2c, 0xfd, 0xf9, 0x26, 0xe0 },
8
},
/* 13 byte nonce, 12 byte header, 19 byte pt */
{
{ 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF },
{ 0x00, 0x00, 0x00, 0x06, 0x05, 0x04, 0x03, 0xA0,
0xA1, 0xA2, 0xA3, 0xA4, 0xA5 },
13,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B },
12,
{ 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
0x1C, 0x1D, 0x1E },
19,
{ 0xA2, 0x8C, 0x68, 0x65, 0x93, 0x9A, 0x9A, 0x79,
0xFA, 0xAA, 0x5C, 0x4C, 0x2A, 0x9D, 0x4A, 0x91,
0xCD, 0xAC, 0x8C },
{ 0x96, 0xC8, 0x61, 0xB9, 0xC9, 0xE6, 0x1E, 0xF1 },
8
},
/* supplied by Brian Gladman */
{
{ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f },
{ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 },
7,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 },
8,
{ 0x20, 0x21, 0x22, 0x23 },
4,
{ 0x71, 0x62, 0x01, 0x5b },
{ 0x4d, 0xac, 0x25, 0x5d },
4
},
{
{ 0xc9, 0x7c, 0x1f, 0x67, 0xce, 0x37, 0x11, 0x85,
0x51, 0x4a, 0x8a, 0x19, 0xf2, 0xbd, 0xd5, 0x2f },
{ 0x00, 0x50, 0x30, 0xf1, 0x84, 0x44, 0x08, 0xb5,
0x03, 0x97, 0x76, 0xe7, 0x0c },
13,
{ 0x08, 0x40, 0x0f, 0xd2, 0xe1, 0x28, 0xa5, 0x7c,
0x50, 0x30, 0xf1, 0x84, 0x44, 0x08, 0xab, 0xae,
0xa5, 0xb8, 0xfc, 0xba, 0x00, 0x00 },
22,
{ 0xf8, 0xba, 0x1a, 0x55, 0xd0, 0x2f, 0x85, 0xae,
0x96, 0x7b, 0xb6, 0x2f, 0xb6, 0xcd, 0xa8, 0xeb,
0x7e, 0x78, 0xa0, 0x50 },
20,
{ 0xf3, 0xd0, 0xa2, 0xfe, 0x9a, 0x3d, 0xbf, 0x23,
0x42, 0xa6, 0x43, 0xe4, 0x32, 0x46, 0xe8, 0x0c,
0x3c, 0x04, 0xd0, 0x19 },
{ 0x78, 0x45, 0xce, 0x0b, 0x16, 0xf9, 0x76, 0x23 },
8
},
};
unsigned long taglen, x, y;
unsigned char buf[64], buf2[64], tag[16], tag2[16], tag3[16], zero[64];
int err, idx;
symmetric_key skey;
ccm_state ccm;
zeromem(zero, 64);
idx = find_cipher("aes");
if (idx == -1) {
idx = find_cipher("rijndael");
if (idx == -1) {
return CRYPT_NOP;
}
}
for (x = 0; x < (sizeof(tests)/sizeof(tests[0])); x++) {
for (y = 0; y < 2; y++) {
taglen = tests[x].taglen;
if (y == 0) {
if ((err = cipher_descriptor[idx].setup(tests[x].key, 16, 0, &skey)) != CRYPT_OK) {
return err;
}
if ((err = ccm_memory(idx,
tests[x].key, 16,
&skey,
tests[x].nonce, tests[x].noncelen,
tests[x].header, tests[x].headerlen,
(unsigned char*)tests[x].pt, tests[x].ptlen,
buf,
tag, &taglen, 0)) != CRYPT_OK) {
return err;
}
} else {
if ((err = ccm_init(&ccm, idx, tests[x].key, 16, tests[x].ptlen, tests[x].taglen, tests[x].headerlen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_add_nonce(&ccm, tests[x].nonce, tests[x].noncelen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_add_aad(&ccm, tests[x].header, tests[x].headerlen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_process(&ccm, (unsigned char*)tests[x].pt, tests[x].ptlen, buf, CCM_ENCRYPT)) != CRYPT_OK) {
return err;
}
if ((err = ccm_done(&ccm, tag, &taglen)) != CRYPT_OK) {
return err;
}
}
if (XMEMCMP(buf, tests[x].ct, tests[x].ptlen)) {
#if defined(LTC_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
print_hex("ct is ", buf, tests[x].ptlen);
print_hex("ct should", tests[x].ct, tests[x].ptlen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (tests[x].taglen != taglen) {
#if defined(LTC_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
printf("taglen %lu (is) %lu (should)\n", taglen, tests[x].taglen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (XMEMCMP(tag, tests[x].tag, tests[x].taglen)) {
#if defined(LTC_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
print_hex("tag is ", tag, tests[x].taglen);
print_hex("tag should", tests[x].tag, tests[x].taglen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (y == 0) {
XMEMCPY(tag3, tests[x].tag, tests[x].taglen);
taglen = tests[x].taglen;
if ((err = ccm_memory(idx,
tests[x].key, 16,
NULL,
tests[x].nonce, tests[x].noncelen,
tests[x].header, tests[x].headerlen,
buf2, tests[x].ptlen,
buf,
tag3, &taglen, 1 )) != CRYPT_OK) {
return err;
}
} else {
if ((err = ccm_init(&ccm, idx, tests[x].key, 16, tests[x].ptlen, tests[x].taglen, tests[x].headerlen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_add_nonce(&ccm, tests[x].nonce, tests[x].noncelen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_add_aad(&ccm, tests[x].header, tests[x].headerlen)) != CRYPT_OK) {
return err;
}
if ((err = ccm_process(&ccm, buf2, tests[x].ptlen, buf, CCM_DECRYPT)) != CRYPT_OK) {
return err;
}
if ((err = ccm_done(&ccm, tag2, &taglen)) != CRYPT_OK) {
return err;
}
}
if (XMEMCMP(buf2, tests[x].pt, tests[x].ptlen)) {
#if defined(LTC_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
print_hex("pt is ", buf2, tests[x].ptlen);
print_hex("pt should", tests[x].pt, tests[x].ptlen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (y == 0) {
/* check if decryption with the wrong tag does not reveal the plaintext */
XMEMCPY(tag3, tests[x].tag, tests[x].taglen);
tag3[0] ^= 0xff; /* set the tag to the wrong value */
taglen = tests[x].taglen;
if ((err = ccm_memory(idx,
tests[x].key, 16,
NULL,
tests[x].nonce, tests[x].noncelen,
tests[x].header, tests[x].headerlen,
buf2, tests[x].ptlen,
buf,
tag3, &taglen, 1 )) != CRYPT_ERROR) {
return CRYPT_FAIL_TESTVECTOR;
}
if (XMEMCMP(buf2, zero, tests[x].ptlen)) {
#if defined(LTC_CCM_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
print_hex("pt is ", buf2, tests[x].ptlen);
print_hex("pt should", zero, tests[x].ptlen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
} else {
/* FIXME: Only check the tag if ccm_memory was not called: ccm_memory already
validates the tag. ccm_process and ccm_done should somehow do the same,
although with current setup it is impossible to keep the plaintext hidden
if the tag is incorrect.
*/
if (XMEMCMP(tag2, tests[x].tag, tests[x].taglen)) {
#if defined(LTC_TEST_DBG)
printf("\n%d: x=%lu y=%lu\n", __LINE__, x, y);
print_hex("tag is ", tag2, tests[x].taglen);
print_hex("tag should", tests[x].tag, tests[x].taglen);
#endif
return CRYPT_FAIL_TESTVECTOR;
}
}
if (y == 0) {
cipher_descriptor[idx].done(&skey);
}
}
}
return CRYPT_OK;
#endif
}
int
main(int argc, char **argv)
{
symmetric_key skey;
int err;
/* Build the nonse */
uint8_t nonse[13];
uint8_t *ptr = nonse;
memcpy(ptr, addr, 8);
ptr += 8;
memcpy(ptr, (uint8_t *)&frame_ctr, 4);
ptr += 4;
memcpy(ptr, &sec_level, 1);
/* build the message */
memset(msg, 0, sizeof(msg));
msg[0] = 0xaa;
printf("VARIABLES\n");
printf("key: ");
print_buffer(key, sizeof(key));
printf("\n");
printf("nonse: ");
print_buffer(nonse, sizeof(nonse));
printf("\n");
printf("a: ");
print_buffer(hdr, sizeof(hdr));
printf("\n");
printf("\n");
register_cipher(&aes_desc);
err = aes_setup(key, 16, 0, &skey);
if (err != CRYPT_OK)
{
printf("setup failed with error %s\n", error_to_string(err));
return -1;
}
err = ccm_memory(find_cipher("aes"),
NULL, 0,
&skey,
nonse, 13,
hdr, sizeof(hdr),
msg, 2,
ct,
tag, &tag_len,
CCM_ENCRYPT);
if (err != CRYPT_OK)
{
printf("encryption failed with error %s\n", error_to_string(err));
return -1;
}
printf("ENCRYPTED\n");
printf("input: ");
print_buffer(msg, sizeof(msg));
printf("\n");
printf("output: ");
print_buffer(ct, sizeof(ct));
printf("\n");
printf("tag: ");
print_buffer(tag, tag_len);
printf("\n");
printf("\n");
memset(msg, 0xff, sizeof(msg));
memset(tag, 0xff, sizeof(tag));
memset(ct+2, 0x00, sizeof(ct)-2);
err = ccm_memory(find_cipher("aes"),
NULL, 0,
&skey,
nonse, 13,
hdr, sizeof(hdr),
msg, 2,
ct,
tag, &tag_len,
CCM_DECRYPT);
if (err != CRYPT_OK)
{
printf("encryption failed with error %s\n", error_to_string(err));
return -1;
}
printf("DECRYPTED\n");
printf("input: ");
print_buffer(ct, sizeof(ct));
printf("\n");
printf("output: ");
print_buffer(msg, sizeof(msg));
printf("\n");
printf("tag: ");
print_buffer(tag, tag_len);
printf("\n");
aes_done(&skey);
return 0;
}
int ccm_test(void)
{
#ifndef LTC_TEST
return CRYPT_NOP;
#else
static const struct {
unsigned char key[16];
unsigned char nonce[16];
int noncelen;
unsigned char header[64];
int headerlen;
unsigned char pt[64];
int ptlen;
unsigned char ct[64];
unsigned char tag[16];
int taglen;
} tests[] = {
/* 13 byte nonce, 8 byte auth, 23 byte pt */
{
{ 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF },
{ 0x00, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00, 0xA0,
0xA1, 0xA2, 0xA3, 0xA4, 0xA5 },
13,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 },
8,
{ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E },
23,
{ 0x58, 0x8C, 0x97, 0x9A, 0x61, 0xC6, 0x63, 0xD2,
0xF0, 0x66, 0xD0, 0xC2, 0xC0, 0xF9, 0x89, 0x80,
0x6D, 0x5F, 0x6B, 0x61, 0xDA, 0xC3, 0x84 },
{ 0x17, 0xe8, 0xd1, 0x2c, 0xfd, 0xf9, 0x26, 0xe0 },
8
},
/* 13 byte nonce, 12 byte header, 19 byte pt */
{
{ 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF },
{ 0x00, 0x00, 0x00, 0x06, 0x05, 0x04, 0x03, 0xA0,
0xA1, 0xA2, 0xA3, 0xA4, 0xA5 },
13,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B },
12,
{ 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
0x1C, 0x1D, 0x1E },
19,
{ 0xA2, 0x8C, 0x68, 0x65, 0x93, 0x9A, 0x9A, 0x79,
0xFA, 0xAA, 0x5C, 0x4C, 0x2A, 0x9D, 0x4A, 0x91,
0xCD, 0xAC, 0x8C },
{ 0x96, 0xC8, 0x61, 0xB9, 0xC9, 0xE6, 0x1E, 0xF1 },
8
},
/* supplied by Brian Gladman */
{
{ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f },
{ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 },
7,
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 },
8,
{ 0x20, 0x21, 0x22, 0x23 },
4,
{ 0x71, 0x62, 0x01, 0x5b },
{ 0x4d, 0xac, 0x25, 0x5d },
4
},
{
{ 0xc9, 0x7c, 0x1f, 0x67, 0xce, 0x37, 0x11, 0x85,
0x51, 0x4a, 0x8a, 0x19, 0xf2, 0xbd, 0xd5, 0x2f },
{ 0x00, 0x50, 0x30, 0xf1, 0x84, 0x44, 0x08, 0xb5,
0x03, 0x97, 0x76, 0xe7, 0x0c },
13,
{ 0x08, 0x40, 0x0f, 0xd2, 0xe1, 0x28, 0xa5, 0x7c,
0x50, 0x30, 0xf1, 0x84, 0x44, 0x08, 0xab, 0xae,
0xa5, 0xb8, 0xfc, 0xba, 0x00, 0x00 },
22,
{ 0xf8, 0xba, 0x1a, 0x55, 0xd0, 0x2f, 0x85, 0xae,
0x96, 0x7b, 0xb6, 0x2f, 0xb6, 0xcd, 0xa8, 0xeb,
0x7e, 0x78, 0xa0, 0x50 },
20,
{ 0xf3, 0xd0, 0xa2, 0xfe, 0x9a, 0x3d, 0xbf, 0x23,
0x42, 0xa6, 0x43, 0xe4, 0x32, 0x46, 0xe8, 0x0c,
0x3c, 0x04, 0xd0, 0x19 },
{ 0x78, 0x45, 0xce, 0x0b, 0x16, 0xf9, 0x76, 0x23 },
8
},
};
unsigned long taglen, x;
unsigned char buf[64], buf2[64], tag2[16], tag[16];
int err, idx;
symmetric_key skey;
idx = find_cipher("aes");
if (idx == -1) {
idx = find_cipher("rijndael");
if (idx == -1) {
return CRYPT_NOP;
}
}
for (x = 0; x < (sizeof(tests)/sizeof(tests[0])); x++) {
taglen = tests[x].taglen;
if ((err = cipher_descriptor[idx].setup(tests[x].key, 16, 0, &skey)) != CRYPT_OK) {
return err;
}
if ((err = ccm_memory(idx,
tests[x].key, 16,
&skey,
tests[x].nonce, tests[x].noncelen,
tests[x].header, tests[x].headerlen,
(unsigned char*)tests[x].pt, tests[x].ptlen,
buf,
tag, &taglen, 0)) != CRYPT_OK) {
return err;
}
if (XMEMCMP(buf, tests[x].ct, tests[x].ptlen)) {
return CRYPT_FAIL_TESTVECTOR;
}
if (XMEMCMP(tag, tests[x].tag, tests[x].taglen)) {
return CRYPT_FAIL_TESTVECTOR;
}
if ((err = ccm_memory(idx,
tests[x].key, 16,
NULL,
tests[x].nonce, tests[x].noncelen,
tests[x].header, tests[x].headerlen,
buf2, tests[x].ptlen,
buf,
tag2, &taglen, 1 )) != CRYPT_OK) {
return err;
}
if (XMEMCMP(buf2, tests[x].pt, tests[x].ptlen)) {
return CRYPT_FAIL_TESTVECTOR;
}
if (XMEMCMP(tag2, tests[x].tag, tests[x].taglen)) {
return CRYPT_FAIL_TESTVECTOR;
}
cipher_descriptor[idx].done(&skey);
}
return CRYPT_OK;
#endif
}
