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ocb_init fix (preventing index overflow)

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This commit is contained in:
Karel Miko 2012-09-04 15:44:32 +02:00 committed by Steffen Jaeckel
parent 9c2193b722
commit c5c067fd12
1 changed files with 5 additions and 1 deletions
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6
src/encauth/ocb/ocb_init.c
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@ -60,11 +60,15 @@ int ocb_init(ocb_state *ocb, int cipher,
/* determine which polys to use */
ocb->block_len = cipher_descriptor[cipher].block_length;
for (poly = 0; poly < (int)(sizeof(polys)/sizeof(polys[0])); poly++) {
x = (int)(sizeof(polys)/sizeof(polys[0]));
for (poly = 0; poly < x; poly++) {
if (polys[poly].len == ocb->block_len) {
break;
}
}
if (poly == x) {
return CRYPT_INVALID_ARG; /* block_len not found in polys */
}
if (polys[poly].len != ocb->block_len) {
return CRYPT_INVALID_ARG;
}