1 files changed, 37 insertions, 0 deletions
diff --git a/src/include/common/md5.h b/src/include/common/md5.h
new file mode 100644
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--- /dev/null
+++ b/src/include/common/md5.h
@@ -0,0 +1,37 @@
+/*-------------------------------------------------------------------------
+ *
+ * md5.h
+ *	  Constants and common utilities related to MD5.
+ *
+ * These definitions are needed by both frontend and backend code to work
+ * with MD5-encrypted passwords.
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/common/md5.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_MD5_H
+#define PG_MD5_H
+
+/* Size of result generated by MD5 computation */
+#define MD5_DIGEST_LENGTH 16
+/* Block size for MD5 */
+#define MD5_BLOCK_SIZE	64
+
+/* password-related data */
+#define MD5_PASSWD_CHARSET	"0123456789abcdef"
+#define MD5_PASSWD_LEN	35
+
+/* Utilities common to all the MD5 implementations, as of md5_common.c */
+extern bool pg_md5_hash(const void *buff, size_t len, char *hexsum,
+						const char **errstr);
+extern bool pg_md5_binary(const void *buff, size_t len, void *outbuf,
+						  const char **errstr);
+extern bool pg_md5_encrypt(const char *passwd, const char *salt,
+						   size_t salt_len, char *buf,
+						   const char **errstr);
+
+#endif							/* PG_MD5_H */