Update HMAC functions to return an error where relevant.

1 files changed, 13 insertions, 7 deletions

diff --git a/doc/crypto/hmac.pod b/doc/crypto/hmac.pod
index 0bd79a6d3a..628d680a51 100644
--- a/doc/crypto/hmac.pod
+++ b/doc/crypto/hmac.pod
@@ -15,12 +15,12 @@ authentication code
 
  void HMAC_CTX_init(HMAC_CTX *ctx);
 
- void HMAC_Init(HMAC_CTX *ctx, const void *key, int key_len,
+ int 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,
+ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int key_len,
                	   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);
+ int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len);
+ int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
 
  void HMAC_CTX_cleanup(HMAC_CTX *ctx);
  void HMAC_cleanup(HMAC_CTX *ctx);
@@ -78,10 +78,13 @@ must have space for the hash function output.
 
 =head1 RETURN VALUES
 
-HMAC() returns a pointer to the message authentication code.
+HMAC() returns a pointer to the message authentication code or NULL if
+an error occurred.
 
-HMAC_CTX_init(), HMAC_Init_ex(), HMAC_Update(), HMAC_Final() and
-HMAC_CTX_cleanup() do not return values.
+HMAC_Init_ex(), HMAC_Update() and HMAC_Final() return 1 for success or 0 if
+an error occurred.
+
+HMAC_CTX_init() and HMAC_CTX_cleanup() do not return values.
 
 =head1 CONFORMING TO
 
@@ -99,4 +102,7 @@ are available since SSLeay 0.9.0.
 HMAC_CTX_init(), HMAC_Init_ex() and HMAC_CTX_cleanup() are available
 since OpenSSL 0.9.7.
 
+HMAC_Init_ex(), HMAC_Update() and HMAC_Final() did not return values in
+versions of OpenSSL before 0.9.9.
+
 =cut