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This patch adds native LDAP auth, for those platforms that don't have

Browse Source 
PAM (such as Win32, but also unixen without PAM). On Unix, uses
OpenLDAP. On win32, uses the builin WinLDAP library.

Magnus Hagander
This commit is contained in:
Bruce Momjian
2006-03-06 17:41:44 +00:00
parent ebdc35822d
commit 357cc01e57
7 changed files with 654 additions and 6 deletions
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165
src/backend/libpq/auth.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.134 2006/03/05 15:58:27 momjian Exp $
* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.135 2006/03/06 17:41:43 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -69,6 +69,32 @@ static Port *pam_port_cludge; /* Workaround for passing "Port *port" into
* pam_passwd_conv_proc */
#endif /* USE_PAM */
#ifdef USE_LDAP
#ifndef WIN32
/* We use a deprecated function to keep the codepaths the same as the
* win32 one. */
#define LDAP_DEPRECATED 1
#include <ldap.h>
#else
/* Header broken in MingW */
#define ldap_start_tls_sA __BROKEN_LDAP_HEADER
#include <winldap.h>
#undef ldap_start_tls_sA
/* Correct header from the Platform SDK */
WINLDAPAPI ULONG ldap_start_tls_sA (
IN PLDAP ExternalHandle,
OUT PULONG ServerReturnValue,
OUT LDAPMessage **result,
IN PLDAPControlA *ServerControls,
IN PLDAPControlA *ClientControls
);
#endif
static int CheckLDAPAuth(Port *port);
#endif
#ifdef KRB5
/*----------------------------------------------------------------
* MIT Kerberos authentication system - protocol version 5
@ -327,6 +353,11 @@ auth_failed(Port *port, int status)
errstr = gettext_noop("PAM authentication failed for user \"%s\"");
break;
#endif /* USE_PAM */
#ifdef USE_LDAP
case uaLDAP:
errstr = gettext_noop("LDAP authentication failed for user \"%s\"");
break;
#endif /* USE_LDAP */
default:
errstr = gettext_noop("authentication failed for user \"%s\": invalid authentication method");
break;
@ -455,6 +486,12 @@ ClientAuthentication(Port *port)
break;
#endif /* USE_PAM */
#ifdef USE_LDAP
case uaLDAP:
status = CheckLDAPAuth(port);
break;
#endif
case uaTrust:
status = STATUS_OK;
break;
@ -674,6 +711,132 @@ CheckPAMAuth(Port *port, char *user, char *password)
#endif /* USE_PAM */
#ifdef USE_LDAP
static int
CheckLDAPAuth(Port *port)
{
char *passwd;
char server[128];
char basedn[128];
char prefix[128];
char suffix[128];
LDAP *ldap;
int ssl = 0;
int r;
int ldapversion = LDAP_VERSION3;
int ldapport = LDAP_PORT;
char fulluser[128];
if (!port->auth_arg || port->auth_arg[0] == '\0')
{
ereport(LOG,
(errmsg("LDAP configuration URL not specified")));
return STATUS_ERROR;
}
/*
* Crack the LDAP url. We do a very trivial parse..
* ldap[s]://<server>[:<port>]/<basedn>[;prefix[;suffix]]
*/
server[0] = '\0';
basedn[0] = '\0';
prefix[0] = '\0';
suffix[0] = '\0';
/* ldap, including port number */
r = sscanf(port->auth_arg,
"ldap://%127[^:]:%i/%127[^;];%127[^;];%127s",
server, &ldapport, basedn, prefix, suffix);
if (r < 3)
{
/* ldaps, including port number */
r = sscanf(port->auth_arg,
"ldaps://%127[^:]:%i/%127[^;];%127[^;];%127s",
server, &ldapport, basedn, prefix, suffix);
if (r >=3) ssl = 1;
}
if (r < 3)
{
/* ldap, no port number */
r = sscanf(port->auth_arg,
"ldap://%127[^/]/%127[^;];%127[^;];%127s",
server, basedn, prefix, suffix);
}
if (r < 2)
{
/* ldaps, no port number */
r = sscanf(port->auth_arg,
"ldaps://%127[^/]/%127[^;];%127[^;];%127s",
server, basedn, prefix, suffix);
if (r >= 2) ssl = 1;
}
if (r < 2)
{
ereport(LOG,
(errmsg("Invalid LDAP url: '%s'", port->auth_arg)));
return STATUS_ERROR;
}
sendAuthRequest(port, AUTH_REQ_PASSWORD);
passwd = recv_password_packet(port);
if (passwd == NULL)
return STATUS_EOF; /* client wouldn't send password */
ldap = ldap_init(server, ldapport);
if (!ldap)
{
ereport(LOG,
(errmsg("Failed to initialize LDAP: %i",
#ifndef WIN32
errno
#else
(int)LdapGetLastError()
#endif
)));
return STATUS_ERROR;
}
if ((r = ldap_set_option(ldap, LDAP_OPT_PROTOCOL_VERSION, &ldapversion)) != LDAP_SUCCESS)
{
ereport(LOG,
(errmsg("Failed to set LDAP version: %i", r)));
return STATUS_ERROR;
}
if (ssl)
{
#ifndef WIN32
if ((r = ldap_start_tls_s(ldap, NULL, NULL)) != LDAP_SUCCESS)
#else
if ((r = ldap_start_tls_sA(ldap, NULL, NULL, NULL, NULL)) != LDAP_SUCCESS)
#endif
{
ereport(LOG,
(errmsg("Failed to start LDAP TLS session: %i", r)));
return STATUS_ERROR;
}
}
snprintf(fulluser, sizeof(fulluser)-1, "%s%s%s", prefix, port->user_name, suffix);
fulluser[sizeof(fulluser)-1] = '\0';
r = ldap_simple_bind_s(ldap, fulluser, passwd);
ldap_unbind(ldap);
if (r != LDAP_SUCCESS)
{
ereport(LOG,
(errmsg("LDAP login failed for user '%s' on server '%s': %i",fulluser,server,r)));
return STATUS_ERROR;
}
return STATUS_OK;
}
#endif /* USE_LDAP */
/*
* Collect password response packet from frontend.
*