diff --git a/src/crypto/ms_funcs.c b/src/crypto/ms_funcs.c
index 49a5c1c24..5f5765603 100644
--- a/src/crypto/ms_funcs.c
+++ b/src/crypto/ms_funcs.c
@@ -78,9 +78,8 @@ static int utf8_to_ucs2(const u8 *utf8_string, size_t utf8_string_len,
  * @challenge: 8-octet Challenge (OUT)
  * Returns: 0 on success, -1 on failure
  */
-static int challenge_hash(const u8 *peer_challenge, const u8 *auth_challenge,
-			  const u8 *username, size_t username_len,
-			  u8 *challenge)
+int challenge_hash(const u8 *peer_challenge, const u8 *auth_challenge,
+		   const u8 *username, size_t username_len, u8 *challenge)
 {
 	u8 hash[SHA1_MAC_LEN];
 	const unsigned char *addr[3];
diff --git a/src/crypto/ms_funcs.h b/src/crypto/ms_funcs.h
index bd9bfee95..b5b5918e1 100644
--- a/src/crypto/ms_funcs.h
+++ b/src/crypto/ms_funcs.h
@@ -33,6 +33,8 @@ int nt_challenge_response(const u8 *challenge, const u8 *password,
 
 void challenge_response(const u8 *challenge, const u8 *password_hash,
 			u8 *response);
+int challenge_hash(const u8 *peer_challenge, const u8 *auth_challenge,
+		   const u8 *username, size_t username_len, u8 *challenge);
 int nt_password_hash(const u8 *password, size_t password_len,
 		     u8 *password_hash);
 int hash_nt_password_hash(const u8 *password_hash, u8 *password_hash_hash);