Make the input parameters for SSL_SESSION_set1_master_key const

[openssl.git] / doc / man3 / HMAC.pod

diff --git a/doc/man3/HMAC.pod b/doc/man3/HMAC.pod
index 42f0bfd304bc91cc5df914270f8a1c3290efd55a..8cc3df9ab7eb201b25ec52e0c7fa223863085d7b 100644 (file)
--- a/doc/man3/HMAC.pod
+++ b/doc/man3/HMAC.pod
@@ -21,14 +21,14 @@ HMAC_size
  #include <openssl/hmac.h>
 
  unsigned char *HMAC(const EVP_MD *evp_md, const void *key,
-               int key_len, const unsigned char *d, int n,
-               unsigned char *md, unsigned int *md_len);
+                     int key_len, const unsigned char *d, int n,
+                     unsigned char *md, unsigned int *md_len);
 
  HMAC_CTX *HMAC_CTX_new(void);
  int HMAC_CTX_reset(HMAC_CTX *ctx);
 
  int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int key_len,
-                   const EVP_MD *md, ENGINE *impl);
+                  const EVP_MD *md, ENGINE *impl);
  int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len);
  int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
 
@@ -60,7 +60,8 @@ 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.