1 files changed, 46 insertions, 0 deletions
diff --git a/src/include/libpq/crypt.h b/src/include/libpq/crypt.h
new file mode 100644
index 0000000..a4fea6e
--- /dev/null
+++ b/src/include/libpq/crypt.h
@@ -0,0 +1,46 @@
+/*-------------------------------------------------------------------------
+ *
+ * crypt.h
+ *	  Interface to libpq/crypt.c
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/libpq/crypt.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_CRYPT_H
+#define PG_CRYPT_H
+
+#include "datatype/timestamp.h"
+
+/*
+ * Types of password hashes or secrets.
+ *
+ * Plaintext passwords can be passed in by the user, in a CREATE/ALTER USER
+ * command. They will be encrypted to MD5 or SCRAM-SHA-256 format, before
+ * storing on-disk, so only MD5 and SCRAM-SHA-256 passwords should appear
+ * in pg_authid.rolpassword. They are also the allowed values for the
+ * password_encryption GUC.
+ */
+typedef enum PasswordType
+{
+	PASSWORD_TYPE_PLAINTEXT = 0,
+	PASSWORD_TYPE_MD5,
+	PASSWORD_TYPE_SCRAM_SHA_256
+} PasswordType;
+
+extern PasswordType get_password_type(const char *shadow_pass);
+extern char *encrypt_password(PasswordType target_type, const char *role,
+							  const char *password);
+
+extern char *get_role_password(const char *role, char **logdetail);
+
+extern int	md5_crypt_verify(const char *role, const char *shadow_pass,
+							 const char *client_pass, const char *md5_salt,
+							 int md5_salt_len, char **logdetail);
+extern int	plain_crypt_verify(const char *role, const char *shadow_pass,
+							   const char *client_pass, char **logdetail);
+
+#endif