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ocb3: check the length of the nonce

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This commit is contained in:
Steffen Jaeckel 2017-08-02 14:41:46 +02:00
parent b2448c593a
commit 1aaa5abb33
1 changed files with 6 additions and 0 deletions
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6
src/encauth/ocb3/ocb3_init.c
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@ -56,6 +56,12 @@ int ocb3_init(ocb3_state *ocb, int cipher,
} }
ocb->cipher = cipher; ocb->cipher = cipher;
/* Valid Nonce?
* As of RFC7253: "string of no more than 120 bits" */
if (noncelen > (120/8)) {
return CRYPT_INVALID_ARG;
}
/* determine which polys to use */ /* determine which polys to use */
ocb->block_len = cipher_descriptor[cipher].block_length; ocb->block_len = cipher_descriptor[cipher].block_length;
x = (int)(sizeof(polys)/sizeof(polys[0])); x = (int)(sizeof(polys)/sizeof(polys[0]));