Correct HMAC code to work with new larger SHAxxx hashes.

security/nss/lib/softoken/alghmac.c

@@ -62,7 +62,7 @@ HMAC_Create(const SECHashObject *hash_obj, const unsigned char *secret,
 {
     HMACContext *cx;
     unsigned int i;
-    unsigned char hashed_secret[SHA1_LENGTH];
+    unsigned char hashed_secret[HASH_LENGTH_MAX];
 
     /* required by FIPS 198 Section 3 */
     if (isFIPS && secret_len < hash_obj->length/2) {

security/nss/lib/softoken/alghmac.h

@@ -43,8 +43,7 @@ extern void
 HMAC_Destroy(HMACContext *cx);
 
 /* create HMAC context
- *  hash_alg	the algorithm with which the HMAC is performed.  This 
- *		should be, SEC_OID_MD5, SEC_OID_SHA1, or SEC_OID_MD2.
+ *  hashObj     hash object from SECRawHashObjects[]
  *  secret	the secret with which the HMAC is performed.
  *  secret_len	the length of the secret.
  *  isFIPS	true if conforming to FIPS 198.