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OCBv3: fix handling of empty plaintext

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This commit is contained in:
Steffen Jaeckel 2017-08-03 13:19:12 +02:00
parent bc0c18f347
commit 868c5a82c3
5 changed files with 20 additions and 11 deletions
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6
src/encauth/ocb3/ocb3_decrypt.c
View File

@ -30,8 +30,10 @@ int ocb3_decrypt(ocb3_state *ocb, const unsigned char *ct, unsigned long ctlen,
unsigned char *pt_b, *ct_b;
LTC_ARGCHK(ocb != NULL);
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
if (ct == NULL) LTC_ARGCHK(ctlen == 0);
if (ctlen == 0) LTC_ARGCHK(ct == NULL);
else LTC_ARGCHK(pt != NULL);
if ((err = cipher_is_valid(ocb->cipher)) != CRYPT_OK) {
return err;
}

6
src/encauth/ocb3/ocb3_decrypt_last.c
View File

@ -30,8 +30,10 @@ int ocb3_decrypt_last(ocb3_state *ocb, const unsigned char *ct, unsigned long ct
int err, x, full_blocks, full_blocks_len, last_block_len;
LTC_ARGCHK(ocb != NULL);
LTC_ARGCHK(ct != NULL);
LTC_ARGCHK(pt != NULL);
if (ct == NULL) LTC_ARGCHK(ctlen == 0);
if (ctlen == 0) LTC_ARGCHK(ct == NULL);
else LTC_ARGCHK(pt != NULL);
if ((err = cipher_is_valid(ocb->cipher)) != CRYPT_OK) {
goto LBL_ERR;
}

6
src/encauth/ocb3/ocb3_encrypt.c
View File

@ -30,8 +30,10 @@ int ocb3_encrypt(ocb3_state *ocb, const unsigned char *pt, unsigned long ptlen,
unsigned char *pt_b, *ct_b;
LTC_ARGCHK(ocb != NULL);
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
if (pt == NULL) LTC_ARGCHK(ptlen == 0);
if (ptlen == 0) LTC_ARGCHK(pt == NULL);
else LTC_ARGCHK(ct != NULL);
if ((err = cipher_is_valid(ocb->cipher)) != CRYPT_OK) {
return err;
}

5
src/encauth/ocb3/ocb3_encrypt_last.c
View File

@ -30,7 +30,10 @@ int ocb3_encrypt_last(ocb3_state *ocb, const unsigned char *pt, unsigned long pt
int err, x, full_blocks, full_blocks_len, last_block_len;
LTC_ARGCHK(ocb != NULL);
LTC_ARGCHK(pt != NULL);
if (pt == NULL) LTC_ARGCHK(ptlen == 0);
if (ptlen == 0) LTC_ARGCHK(pt == NULL);
else LTC_ARGCHK(ct != NULL);
if ((err = cipher_is_valid(ocb->cipher)) != CRYPT_OK) {
goto LBL_ERR;
}

8
src/encauth/ocb3/ocb3_test.c
View File

@ -219,8 +219,8 @@ int ocb3_test(void)
key, sizeof(key),
nonce, sizeof(nonce),
tests[x].aadlen != 0 ? tests[x].aad : NULL, tests[x].aadlen,
tests[x].pt, tests[x].ptlen,
outct, outtag, &len)) != CRYPT_OK) {
tests[x].ptlen != 0 ? tests[x].pt : NULL, tests[x].ptlen,
tests[x].ptlen != 0 ? outct : NULL, outtag, &len)) != CRYPT_OK) {
return err;
}
@ -233,8 +233,8 @@ int ocb3_test(void)
key, sizeof(key),
nonce, sizeof(nonce),
tests[x].aadlen != 0 ? tests[x].aad : NULL, tests[x].aadlen,
outct, tests[x].ptlen,
outct, tests[x].tag, len, &res)) != CRYPT_OK) {
tests[x].ptlen != 0 ? outct : NULL, tests[x].ptlen,
tests[x].ptlen != 0 ? outct : NULL, tests[x].tag, len, &res)) != CRYPT_OK) {
return err;
}
if ((res != 1) || compare_testvector(outct, tests[x].ptlen, tests[x].pt, tests[x].ptlen, "OCB3", x)) {