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pmac_init: prevent possible out of bounds access of polys[]

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This commit is contained in:
Steffen Jaeckel 2014-05-25 00:28:51 +02:00
parent ea9b2a858a
commit 8652f33f35
1 changed files with 3 additions and 0 deletions
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3
src/mac/pmac/pmac_init.c
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@ -63,6 +63,9 @@ int pmac_init(pmac_state *pmac, int cipher, const unsigned char *key, unsigned l
break; break;
} }
} }
if (poly >= (int)(sizeof(polys)/sizeof(polys[0]))) {
return CRYPT_INVALID_ARG;
}
if (polys[poly].len != pmac->block_len) { if (polys[poly].len != pmac->block_len) {
return CRYPT_INVALID_ARG; return CRYPT_INVALID_ARG;
} }