1 /*-------------------------------------------------------------------------
2  *
3  * scram.h
4  *	  Interface to libpq/scram.c
5  *
6  * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
7  * Portions Copyright (c) 1994, Regents of the University of California
8  *
9  * src/include/libpq/scram.h
10  *
11  *-------------------------------------------------------------------------
12  */
13 #ifndef PG_SCRAM_H
14 #define PG_SCRAM_H
15 
16 #include "lib/stringinfo.h"
17 #include "libpq/libpq-be.h"
18 
19 /* Status codes for message exchange */
20 #define SASL_EXCHANGE_CONTINUE		0
21 #define SASL_EXCHANGE_SUCCESS		1
22 #define SASL_EXCHANGE_FAILURE		2
23 
24 /* Routines dedicated to authentication */
25 extern void pg_be_scram_get_mechanisms(Port *port, StringInfo buf);
26 extern void *pg_be_scram_init(Port *port, const char *selected_mech, const char *shadow_pass);
27 extern int pg_be_scram_exchange(void *opaq, char *input, int inputlen,
28 					 char **output, int *outputlen, char **logdetail);
29 
30 /* Routines to handle and check SCRAM-SHA-256 verifier */
31 extern char *pg_be_scram_build_verifier(const char *password);
32 extern bool parse_scram_verifier(const char *verifier, int *iterations, char **salt,
33 					 uint8 *stored_key, uint8 *server_key);
34 extern bool scram_verify_plain_password(const char *username,
35 							const char *password, const char *verifier);
36 
37 #endif							/* PG_SCRAM_H */
38