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Minor optimisation to KDF algorithm.

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Don't need to use temporary buffer if remaining length equals digest length.
(cherry picked from commit 3f6b6f0b8cbd7173b6c007b07caa6ec34cda08c5)
This commit is contained in:
Dr. Stephen Henson 2013-08-01 15:48:44 +01:00
parent 5c4ff8ad37
commit ecf9ceb90d
1 changed files with 1 additions and 1 deletions
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2
crypto/ecdh/ech_kdf.c
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@ -90,7 +90,7 @@ int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
goto err;
if (!EVP_DigestUpdate(&mctx, sinfo, sinfolen))
goto err;
if (outlen > mdlen)
if (outlen >= mdlen)
{
if (!EVP_DigestFinal(&mctx, out, NULL))
goto err;