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wycheproof failing CCM test - invalid tag len

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This commit is contained in:
Karel Miko 2018-10-14 22:36:50 +02:00
parent 983fd25e40
commit 93c676ccd8
1 changed files with 28 additions and 0 deletions
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28
src/encauth/ccm/ccm_test.c
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@ -246,6 +246,34 @@ int ccm_test(void)
}
}
/* wycheproof failing test - https://github.com/libtom/libtomcrypt/pull/452 */
{
unsigned char key[] = { 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f };
unsigned char iv[] = { 0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x51 };
unsigned char valid_tag[] = { 0x23,0x1a,0x2d,0x8f };
unsigned char invalid_tag[] = { 0x23,0x1a,0x2d,0x8f,0x6a };
unsigned char msg[] = { 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f };
unsigned char ct[] = { 0xd3,0xda,0xb1,0xee,0x49,0x4c,0xc2,0x29,0x09,0x9d,0x6c,0xac,0x7d,0xf1,0x4a,0xdd };
unsigned char pt[20] = { 0 };
/* VALID tag */
taglen = sizeof(valid_tag);
err = ccm_memory(idx, key, sizeof(key), NULL, iv, sizeof(iv), NULL, 0,
pt, sizeof(ct), ct, invalid_tag, &taglen, CCM_DECRYPT);
if ((err != CRYPT_OK) || (XMEMCMP(msg, pt, sizeof(msg)) != 0)) {
return CRYPT_FAIL_TESTVECTOR;
}
/* INVALID tag */
taglen = sizeof(invalid_tag);
err = ccm_memory(idx, key, sizeof(key), NULL, iv, sizeof(iv), NULL, 0,
pt, sizeof(ct), ct, invalid_tag, &taglen, CCM_DECRYPT);
if (err == CRYPT_OK) {
fprintf(stderr, "XXX-FIXME ccm_memory should reject invalid tag\n");
/* return CRYPT_FAIL_TESTVECTOR; */
}
}
return CRYPT_OK;
#endif
}