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make sure we don't write to seed[-1]

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This commit is contained in:
Ulf Möller 2001-06-06 17:17:53 +00:00
parent 2b49dd1e8f
commit ee8aa8217a
1 changed files with 5 additions and 0 deletions
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5
crypto/rsa/rsa_oaep.c
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@ -111,6 +111,11 @@ int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
}
lzero = num - flen;
if (lzero < 0)
{
RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, RSA_R_OAEP_DECODING_ERROR);
return (-1);
}
maskeddb = from - lzero + SHA_DIGEST_LENGTH;
MGF1(seed, SHA_DIGEST_LENGTH, maskeddb, dblen);