1 files changed, 35 insertions, 1 deletions

diff --git a/src/sp_php_compat.h b/src/sp_php_compat.h
index 09d9a1f..d1102a8 100644
--- a/src/sp_php_compat.h
+++ b/src/sp_php_compat.h
@@ -1,3 +1,7 @@
+/* code in this file is licensed under its original license
+The PHP License, version 3.01 (https://www.php.net/license/3_01.txt)
+which is also included with these sources in the file `PHP_LICENSE` */
+
 #if PHP_VERSION_ID < 80000
 
 // copied from PHP 8.0.9 sources
@@ -93,4 +97,34 @@ static zend_always_inline void zend_string_efree(zend_string *s)
                 __ht->nNumUsed = _idx; \
         } while (0)
 
-#endif
\ No newline at end of file
+#endif
+
+// copied from PHP 8.0.11 sources, ext/hash/hash.c
+
+static inline void php_hash_string_xor_char(unsigned char *out, const unsigned char *in, const unsigned char xor_with, const size_t length) {
+        size_t i;
+        for (i=0; i < length; i++) {
+                out[i] = in[i] ^ xor_with;
+        }
+}
+
+static inline void php_hash_hmac_prep_key(unsigned char *K, const php_hash_ops *ops, void *context, const unsigned char *key, const size_t key_len) {
+        memset(K, 0, ops->block_size);
+        if (key_len > ops->block_size) {
+                /* Reduce the key first */
+                ops->hash_init(context);
+                ops->hash_update(context, key, key_len);
+                ops->hash_final(K, context);
+        } else {
+                memcpy(K, key, key_len);
+        }
+        /* XOR the key with 0x36 to get the ipad) */
+        php_hash_string_xor_char(K, K, 0x36, ops->block_size);
+}
+
+static inline void php_hash_hmac_round(unsigned char *final, const php_hash_ops *ops, void *context, const unsigned char *key, const unsigned char *data, const zend_long data_size) {
+        ops->hash_init(context);
+        ops->hash_update(context, key, ops->block_size);
+        ops->hash_update(context, data, data_size);
+        ops->hash_final(final, context);
+}