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Diffstat (limited to 'crypto/openssl/doc/crypto/hmac.pod')
| -rw-r--r-- | crypto/openssl/doc/crypto/hmac.pod | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/openssl/doc/crypto/hmac.pod b/crypto/openssl/doc/crypto/hmac.pod index 2c8f20a20188..ca9798af62c3 100644 --- a/crypto/openssl/doc/crypto/hmac.pod +++ b/crypto/openssl/doc/crypto/hmac.pod @@ -38,7 +38,8 @@ B<key_len> bytes long. It places the result in B<md> (which must have space for the output of the hash function, which is no more than B<EVP_MAX_MD_SIZE> bytes). If B<md> is NULL, the digest is placed in a static array. The size of -the output is placed in B<md_len>, unless it is B<NULL>. +the output is placed in B<md_len>, unless it is B<NULL>. Note: passing a NULL +value for B<md> to use the static array is not thread safe. B<evp_md> can be EVP_sha1(), EVP_ripemd160() etc. |