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add corner case cmac test

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merlokk 2021-08-16 14:37:40 +03:00
commit ad4c3d5a90
2 changed files with 33 additions and 8 deletions
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23
client/src/mifare/desfiretest.c
View file

@ -808,9 +808,30 @@ static bool TestLRPCMAC(void) {
LRPSetKey(&ctx, key2, 0, true); LRPSetKey(&ctx, key2, 0, true);
uint8_t data2[] = {0xA4, 0x43, 0x4D, 0x74, 0x0C, 0x2C, 0xB6, 0x65, 0xFE, 0x53, 0x96, 0x95, 0x91, 0x89, 0x38, 0x3F}; uint8_t data2[] = {0xA4, 0x43, 0x4D, 0x74, 0x0C, 0x2C, 0xB6, 0x65, 0xFE, 0x53, 0x96, 0x95, 0x91, 0x89, 0x38, 0x3F};
LRPCMAC(&ctx, data2, sizeof(data2), cmac); LRPCMAC(&ctx, data2, sizeof(data2), cmac);
uint8_t cmacres2[] = {0xA4, 0x43, 0x4D, 0x74, 0x0C, 0x2C, 0xB6, 0x65, 0xFE, 0x53, 0x96, 0x95, 0x91, 0x89, 0x38, 0x3F}; uint8_t cmacres2[] = {0x8B, 0x43, 0xAD, 0xF7, 0x67, 0xE4, 0x6B, 0x69, 0x2E, 0x8F, 0x24, 0xE8, 0x37, 0xCB, 0x5E, 0xFC};
res = res && (memcmp(cmac, cmacres2, sizeof(cmacres2)) == 0); res = res && (memcmp(cmac, cmacres2, sizeof(cmacres2)) == 0);
*/ */
uint8_t key3[] = {0x0D, 0x46, 0x55, 0x75, 0x50, 0xCB, 0x31, 0x3F, 0x36, 0xAF, 0xBA, 0x87, 0x62, 0x5D, 0x96, 0x1A};
LRPSetKey(&ctx, key3, 0, true);
uint8_t data3[] = {0x90};
LRPCMAC(&ctx, data3, sizeof(data3), cmac);
uint8_t cmacres3[] = {0xF7, 0xC8, 0x55, 0x3D, 0xED, 0x57, 0x48, 0x29, 0xE6, 0xEE, 0x68, 0x11, 0x2C, 0xB3, 0x81, 0x7B};
res = res && (memcmp(cmac, cmacres3, sizeof(cmacres3)) == 0);
/*uint8_t key4[] = {0x2A, 0x47, 0x3E, 0x38, 0xBB, 0xF4, 0x53, 0x7C, 0x53, 0x97, 0xF4, 0x5A, 0xE4, 0x98, 0xCD, 0x4D};
LRPSetKey(&ctx, key4, 0, true);
uint8_t data4[] = {0xC2, 0xAC, 0x3D, 0x72, 0x50, 0xEE, 0xF0, 0x23, 0x18, 0xBC, 0x08, 0x4F, 0x29, 0x4B, 0x1A, 0xC7,
0x22, 0x91, 0xEE, 0x1D, 0xC0, 0x2A, 0xF4, 0x24, 0x94, 0x1C, 0xAA, 0xC6, 0x85, 0xFC, 0xA5, 0x9D,
0x90, 0x08, 0x67, 0x9B, 0x00, 0xC5, 0x6A, 0x05, 0x62, 0x58, 0x3B, 0xDA, 0xEC, 0x0B, 0xBA};
LRPCMAC(&ctx, data4, sizeof(data4), cmac);
uint8_t cmacres4[] = {0x66, 0xDC, 0x2B, 0xCE, 0x26, 0x9B, 0x79, 0x3B, 0x4A, 0xCA, 0x1A, 0x4D, 0x04, 0xDD, 0xD6, 0x68};
res = res && (memcmp(cmac, cmacres4, sizeof(cmacres4)) == 0);
*/
uint8_t key5[] = {0x63, 0xA0, 0x16, 0x9B, 0x4D, 0x9F, 0xE4, 0x2C, 0x72, 0xB2, 0x78, 0x4C, 0x80, 0x6E, 0xAC, 0x21};
LRPSetKey(&ctx, key5, 0, true);
LRPCMAC(&ctx, NULL, 0, cmac);
uint8_t cmacres5[] = {0x0E, 0x07, 0xC6, 0x01, 0x97, 0x08, 0x14, 0xA4, 0x17, 0x6F, 0xDA, 0x63, 0x3C, 0x6F, 0xC3, 0xDE};
res = res && (memcmp(cmac, cmacres5, sizeof(cmacres5)) == 0);
if (res) if (res)
PrintAndLogEx(INFO, "LRP CMAC.......... " _GREEN_("passed")); PrintAndLogEx(INFO, "LRP CMAC.......... " _GREEN_("passed"));

20
client/src/mifare/lrpcrypto.c
View file

@ -218,6 +218,7 @@ void LRPGenSubkeys(uint8_t *key, uint8_t *sk1, uint8_t *sk2) {
uint8_t y[CRYPTO_AES128_KEY_SIZE] = {0}; uint8_t y[CRYPTO_AES128_KEY_SIZE] = {0};
LRPEvalLRP(&ctx, const00, CRYPTO_AES128_KEY_SIZE * 2, true, y); LRPEvalLRP(&ctx, const00, CRYPTO_AES128_KEY_SIZE * 2, true, y);
PrintAndLogEx(ERR, "--k %s", sprint_hex(key, 16));
PrintAndLogEx(ERR, "--y %s", sprint_hex(y, 16)); PrintAndLogEx(ERR, "--y %s", sprint_hex(y, 16));
mulPolyX(y); mulPolyX(y);
memcpy(sk1, y, CRYPTO_AES128_KEY_SIZE); memcpy(sk1, y, CRYPTO_AES128_KEY_SIZE);
@ -243,19 +244,22 @@ void LRPCMAC(LRPContext *ctx, uint8_t *data, size_t datalen, uint8_t *cmac) {
} }
size_t bllen = datalen - clen; size_t bllen = datalen - clen;
// padding
if (bllen > 0) { PrintAndLogEx(ERR, "--bllen %d", bllen);
PrintAndLogEx(ERR, "--y %s", sprint_hex(y, 16));
// if there is more data
if (bllen == 16) {
bin_xor(y, sk1, CRYPTO_AES128_KEY_SIZE);
} else {
// padding
uint8_t bl[CRYPTO_AES128_KEY_SIZE] = {0}; uint8_t bl[CRYPTO_AES128_KEY_SIZE] = {0};
memcpy(bl, &data[clen * CRYPTO_AES128_KEY_SIZE], bllen); memcpy(bl, &data[clen * CRYPTO_AES128_KEY_SIZE], bllen);
bl[bllen] = 0x80; bl[bllen] = 0x80;
bin_xor(y, bl, CRYPTO_AES128_KEY_SIZE); bin_xor(y, bl, CRYPTO_AES128_KEY_SIZE);
bin_xor(y, sk2, CRYPTO_AES128_KEY_SIZE);
} }
// if there is more data
if (bllen == 0)
bin_xor(y, sk1, CRYPTO_AES128_KEY_SIZE);
else
bin_xor(y, sk2, CRYPTO_AES128_KEY_SIZE);
LRPEvalLRP(ctx, y, CRYPTO_AES128_KEY_SIZE * 2, true, cmac); LRPEvalLRP(ctx, y, CRYPTO_AES128_KEY_SIZE * 2, true, cmac);
PrintAndLogEx(ERR, "--cmac %s", sprint_hex(cmac, 16));
} }