Clarify docs.

[oweals/openssl.git] / doc / crypto / hmac.pod

diff --git a/doc/crypto/hmac.pod b/doc/crypto/hmac.pod
index 3976baf226a587e45a31cc16cf6554ee639e1179..484e349fd1d6d0e990cb3d3c053fc03515a415c3 100644 (file)
--- a/doc/crypto/hmac.pod
+++ b/doc/crypto/hmac.pod
@@ -18,7 +18,7 @@ authentication code
  void HMAC_Init(HMAC_CTX *ctx, const void *key, int key_len,
                const EVP_MD *md);
  void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int key_len,
-                          const EVP_MD *md);
+                          const EVP_MD *md, ENGINE *impl);
  void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len);
  void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
 
@@ -41,8 +41,6 @@ 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>.
 
 B<evp_md> can be EVP_sha1(), EVP_ripemd160() etc.
-B<key> and B<evp_md> may be B<NULL> if a key and hash function have
-been set in a previous call to HMAC_Init() for that B<HMAC_CTX>.
 
 HMAC_CTX_init() initialises a B<HMAC_CTX> before first use. It must be
 called.