mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-28 03:51:50 +02:00
Rearrange the code in auth.c so that all functions for a single authentication
method is grouped together in a reasonably similar way, keeping the "global shared functions" together in their own section as well. Makes it a lot easier to find your way around the code.
This commit is contained in:
Magnus Hagander
parent
c30c1b8786
commit
26e6991a2d
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.166 2008/08/01 09:09:49 mha Exp $
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* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.167 2008/08/01 11:41:12 mha Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -32,25 +32,33 @@
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#include "libpq/pqformat.h"
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#include "storage/ipc.h"
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/*----------------------------------------------------------------
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* Global authentication functions
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*----------------------------------------------------------------
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*/
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static void sendAuthRequest(Port *port, AuthRequest areq);
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static void auth_failed(Port *port, int status);
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static char *recv_password_packet(Port *port);
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static int recv_and_check_password_packet(Port *port);
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static int authident(hbaPort *port);
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char *pg_krb_server_keyfile;
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char *pg_krb_srvnam;
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bool pg_krb_caseins_users;
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char *pg_krb_server_hostname = NULL;
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char *pg_krb_realm = NULL;
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/*----------------------------------------------------------------
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* Ident authentication
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*----------------------------------------------------------------
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*/
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/* Max size of username ident server can return */
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#define IDENT_USERNAME_MAX 512
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/* Standard TCP port number for Ident service. Assigned by IANA */
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#define IDENT_PORT 113
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static int authident(hbaPort *port);
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/*----------------------------------------------------------------
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* PAM authentication
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*----------------------------------------------------------------
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*/
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#ifdef USE_PAM
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#ifdef HAVE_PAM_PAM_APPL_H
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#include <pam/pam_appl.h>
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@ -75,6 +83,11 @@ static Port *pam_port_cludge; /* Workaround for passing "Port *port" into
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* pam_passwd_conv_proc */
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#endif /* USE_PAM */
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/*----------------------------------------------------------------
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* LDAP authentication
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*----------------------------------------------------------------
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*/
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#ifdef USE_LDAP
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#ifndef WIN32
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/* We use a deprecated function to keep the codepath the same as win32. */
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@ -95,21 +108,33 @@ ULONG(*__ldap_start_tls_sA) (
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#endif
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static int CheckLDAPAuth(Port *port);
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#endif
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#endif /* USE_LDAP */
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/*----------------------------------------------------------------
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* Kerberos and GSSAPI GUCs
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*----------------------------------------------------------------
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*/
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char *pg_krb_server_keyfile;
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char *pg_krb_srvnam;
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bool pg_krb_caseins_users;
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char *pg_krb_server_hostname = NULL;
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char *pg_krb_realm = NULL;
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#ifdef KRB5
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/*----------------------------------------------------------------
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* MIT Kerberos authentication system - protocol version 5
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*----------------------------------------------------------------
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*/
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static int pg_krb5_recvauth(Port *port);
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#ifdef KRB5
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#include <krb5.h>
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/* Some old versions of Kerberos do not include <com_err.h> in <krb5.h> */
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#if !defined(__COM_ERR_H) && !defined(__COM_ERR_H__)
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#include <com_err.h>
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#endif
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/*
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* Various krb5 state which is not connection specfic, and a flag to
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* indicate whether we have initialised it yet.
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@ -118,8 +143,414 @@ static int pg_krb5_initialised;
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static krb5_context pg_krb5_context;
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static krb5_keytab pg_krb5_keytab;
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static krb5_principal pg_krb5_server;
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#endif /* KRB5 */
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/*----------------------------------------------------------------
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* GSSAPI Authentication
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*----------------------------------------------------------------
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*/
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static int pg_GSS_recvauth(Port *port);
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#ifdef ENABLE_GSS
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#if defined(HAVE_GSSAPI_H)
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#include <gssapi.h>
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#else
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#include <gssapi/gssapi.h>
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#endif
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#endif /* ENABLE_GSS */
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/*----------------------------------------------------------------
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* SSPI Authentication
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*----------------------------------------------------------------
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*/
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static int pg_SSPI_recvauth(Port *port);
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#ifdef ENABLE_SSPI
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typedef SECURITY_STATUS
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(WINAPI * QUERY_SECURITY_CONTEXT_TOKEN_FN) (
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PCtxtHandle, void **);
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#endif
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/*----------------------------------------------------------------
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* Global authentication functions
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*----------------------------------------------------------------
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*/
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/*
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* Tell the user the authentication failed, but not (much about) why.
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*
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* There is a tradeoff here between security concerns and making life
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* unnecessarily difficult for legitimate users. We would not, for example,
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* want to report the password we were expecting to receive...
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* But it seems useful to report the username and authorization method
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* in use, and these are items that must be presumed known to an attacker
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* anyway.
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* Note that many sorts of failure report additional information in the
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* postmaster log, which we hope is only readable by good guys.
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*/
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static void
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auth_failed(Port *port, int status)
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{
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const char *errstr;
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/*
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* If we failed due to EOF from client, just quit; there's no point in
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* trying to send a message to the client, and not much point in logging
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* the failure in the postmaster log. (Logging the failure might be
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* desirable, were it not for the fact that libpq closes the connection
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* unceremoniously if challenged for a password when it hasn't got one to
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* send. We'll get a useless log entry for every psql connection under
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* password auth, even if it's perfectly successful, if we log STATUS_EOF
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* events.)
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*/
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if (status == STATUS_EOF)
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proc_exit(0);
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switch (port->auth_method)
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{
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case uaReject:
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errstr = gettext_noop("authentication failed for user \"%s\": host rejected");
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break;
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case uaKrb5:
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errstr = gettext_noop("Kerberos 5 authentication failed for user \"%s\"");
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break;
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case uaGSS:
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errstr = gettext_noop("GSSAPI authentication failed for user \"%s\"");
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break;
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case uaSSPI:
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errstr = gettext_noop("SSPI authentication failed for user \"%s\"");
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break;
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case uaTrust:
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errstr = gettext_noop("\"trust\" authentication failed for user \"%s\"");
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break;
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case uaIdent:
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errstr = gettext_noop("Ident authentication failed for user \"%s\"");
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break;
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case uaMD5:
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case uaCrypt:
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case uaPassword:
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errstr = gettext_noop("password authentication failed for user \"%s\"");
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break;
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#ifdef USE_PAM
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case uaPAM:
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errstr = gettext_noop("PAM authentication failed for user \"%s\"");
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break;
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#endif /* USE_PAM */
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#ifdef USE_LDAP
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case uaLDAP:
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errstr = gettext_noop("LDAP authentication failed for user \"%s\"");
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break;
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#endif /* USE_LDAP */
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default:
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errstr = gettext_noop("authentication failed for user \"%s\": invalid authentication method");
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break;
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}
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ereport(FATAL,
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(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
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errmsg(errstr, port->user_name)));
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/* doesn't return */
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}
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/*
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* Client authentication starts here. If there is an error, this
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* function does not return and the backend process is terminated.
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*/
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void
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ClientAuthentication(Port *port)
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{
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int status = STATUS_ERROR;
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/*
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* Get the authentication method to use for this frontend/database
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* combination. Note: a failure return indicates a problem with the hba
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* config file, not with the request. hba.c should have dropped an error
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* message into the postmaster logfile if it failed.
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*/
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if (hba_getauthmethod(port) != STATUS_OK)
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ereport(FATAL,
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(errcode(ERRCODE_CONFIG_FILE_ERROR),
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errmsg("missing or erroneous pg_hba.conf file"),
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errhint("See server log for details.")));
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switch (port->auth_method)
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{
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case uaReject:
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/*
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* This could have come from an explicit "reject" entry in
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* pg_hba.conf, but more likely it means there was no matching
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* entry. Take pity on the poor user and issue a helpful error
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* message. NOTE: this is not a security breach, because all the
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* info reported here is known at the frontend and must be assumed
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* known to bad guys. We're merely helping out the less clueful
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* good guys.
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*/
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{
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char hostinfo[NI_MAXHOST];
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pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
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hostinfo, sizeof(hostinfo),
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NULL, 0,
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NI_NUMERICHOST);
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#ifdef USE_SSL
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ereport(FATAL,
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(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
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errmsg("no pg_hba.conf entry for host \"%s\", user \"%s\", database \"%s\", %s",
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hostinfo, port->user_name, port->database_name,
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port->ssl ? _("SSL on") : _("SSL off"))));
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#else
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ereport(FATAL,
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(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
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errmsg("no pg_hba.conf entry for host \"%s\", user \"%s\", database \"%s\"",
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hostinfo, port->user_name, port->database_name)));
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#endif
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break;
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}
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case uaKrb5:
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sendAuthRequest(port, AUTH_REQ_KRB5);
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status = pg_krb5_recvauth(port);
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break;
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case uaGSS:
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sendAuthRequest(port, AUTH_REQ_GSS);
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status = pg_GSS_recvauth(port);
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break;
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case uaSSPI:
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sendAuthRequest(port, AUTH_REQ_SSPI);
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status = pg_SSPI_recvauth(port);
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break;
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case uaIdent:
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/*
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* If we are doing ident on unix-domain sockets, use SCM_CREDS
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* only if it is defined and SO_PEERCRED isn't.
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*/
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#if !defined(HAVE_GETPEEREID) && !defined(SO_PEERCRED) && \
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(defined(HAVE_STRUCT_CMSGCRED) || defined(HAVE_STRUCT_FCRED) || \
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(defined(HAVE_STRUCT_SOCKCRED) && defined(LOCAL_CREDS)))
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if (port->raddr.addr.ss_family == AF_UNIX)
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{
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#if defined(HAVE_STRUCT_FCRED) || defined(HAVE_STRUCT_SOCKCRED)
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/*
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* Receive credentials on next message receipt, BSD/OS,
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* NetBSD. We need to set this before the client sends the
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* next packet.
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*/
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int on = 1;
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if (setsockopt(port->sock, 0, LOCAL_CREDS, &on, sizeof(on)) < 0)
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ereport(FATAL,
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(errcode_for_socket_access(),
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errmsg("could not enable credential reception: %m")));
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#endif
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sendAuthRequest(port, AUTH_REQ_SCM_CREDS);
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}
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#endif
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status = authident(port);
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break;
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case uaMD5:
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sendAuthRequest(port, AUTH_REQ_MD5);
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status = recv_and_check_password_packet(port);
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break;
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case uaCrypt:
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sendAuthRequest(port, AUTH_REQ_CRYPT);
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status = recv_and_check_password_packet(port);
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break;
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case uaPassword:
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sendAuthRequest(port, AUTH_REQ_PASSWORD);
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status = recv_and_check_password_packet(port);
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break;
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#ifdef USE_PAM
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case uaPAM:
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pam_port_cludge = port;
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status = CheckPAMAuth(port, port->user_name, "");
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break;
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#endif /* USE_PAM */
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#ifdef USE_LDAP
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case uaLDAP:
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status = CheckLDAPAuth(port);
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break;
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#endif
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case uaTrust:
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status = STATUS_OK;
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break;
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}
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if (status == STATUS_OK)
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sendAuthRequest(port, AUTH_REQ_OK);
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else
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auth_failed(port, status);
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}
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/*
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* Send an authentication request packet to the frontend.
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*/
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static void
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sendAuthRequest(Port *port, AuthRequest areq)
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{
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StringInfoData buf;
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pq_beginmessage(&buf, 'R');
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pq_sendint(&buf, (int32) areq, sizeof(int32));
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/* Add the salt for encrypted passwords. */
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if (areq == AUTH_REQ_MD5)
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pq_sendbytes(&buf, port->md5Salt, 4);
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else if (areq == AUTH_REQ_CRYPT)
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pq_sendbytes(&buf, port->cryptSalt, 2);
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#if defined(ENABLE_GSS) || defined(ENABLE_SSPI)
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/*
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* Add the authentication data for the next step of the GSSAPI or SSPI
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* negotiation.
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*/
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else if (areq == AUTH_REQ_GSS_CONT)
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{
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if (port->gss->outbuf.length > 0)
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{
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elog(DEBUG4, "sending GSS token of length %u",
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(unsigned int) port->gss->outbuf.length);
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pq_sendbytes(&buf, port->gss->outbuf.value, port->gss->outbuf.length);
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}
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}
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#endif
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pq_endmessage(&buf);
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/*
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* Flush message so client will see it, except for AUTH_REQ_OK, which need
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* not be sent until we are ready for queries.
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*/
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if (areq != AUTH_REQ_OK)
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pq_flush();
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}
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/*
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* Collect password response packet from frontend.
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*
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* Returns NULL if couldn't get password, else palloc'd string.
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*/
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static char *
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recv_password_packet(Port *port)
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{
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StringInfoData buf;
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if (PG_PROTOCOL_MAJOR(port->proto) >= 3)
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{
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/* Expect 'p' message type */
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int mtype;
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mtype = pq_getbyte();
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if (mtype != 'p')
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{
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/*
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* If the client just disconnects without offering a password,
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* don't make a log entry. This is legal per protocol spec and in
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* fact commonly done by psql, so complaining just clutters the
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* log.
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*/
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if (mtype != EOF)
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ereport(COMMERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("expected password response, got message type %d",
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mtype)));
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return NULL; /* EOF or bad message type */
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}
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}
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else
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{
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/* For pre-3.0 clients, avoid log entry if they just disconnect */
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if (pq_peekbyte() == EOF)
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return NULL; /* EOF */
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}
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initStringInfo(&buf);
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if (pq_getmessage(&buf, 1000)) /* receive password */
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{
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/* EOF - pq_getmessage already logged a suitable message */
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pfree(buf.data);
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return NULL;
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}
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/*
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* Apply sanity check: password packet length should agree with length of
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* contained string. Note it is safe to use strlen here because
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* StringInfo is guaranteed to have an appended '\0'.
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*/
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if (strlen(buf.data) + 1 != buf.len)
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ereport(COMMERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("invalid password packet size")));
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/* Do not echo password to logs, for security. */
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ereport(DEBUG5,
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(errmsg("received password packet")));
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/*
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* Return the received string. Note we do not attempt to do any
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* character-set conversion on it; since we don't yet know the client's
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* encoding, there wouldn't be much point.
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*/
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return buf.data;
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}
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/*----------------------------------------------------------------
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* MD5 and crypt authentication
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*----------------------------------------------------------------
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*/
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/*
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* Called when we have sent an authorization request for a password.
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* Get the response and check it.
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*/
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static int
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recv_and_check_password_packet(Port *port)
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{
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char *passwd;
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int result;
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passwd = recv_password_packet(port);
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if (passwd == NULL)
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return STATUS_EOF; /* client wouldn't send password */
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result = md5_crypt_verify(port, port->user_name, passwd);
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pfree(passwd);
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return result;
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}
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|
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|
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/*----------------------------------------------------------------
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* MIT Kerberos authentication system - protocol version 5
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*----------------------------------------------------------------
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*/
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#ifdef KRB5
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static int
|
||||
pg_krb5_init(void)
|
||||
{
|
||||
@ -314,19 +745,13 @@ pg_krb5_recvauth(Port *port)
|
||||
}
|
||||
#endif /* KRB5 */
|
||||
|
||||
|
||||
/*----------------------------------------------------------------
|
||||
* GSSAPI authentication system
|
||||
*----------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifdef ENABLE_GSS
|
||||
|
||||
#if defined(HAVE_GSSAPI_H)
|
||||
#include <gssapi.h>
|
||||
#else
|
||||
#include <gssapi/gssapi.h>
|
||||
#endif
|
||||
|
||||
#if defined(WIN32) && !defined(WIN32_ONLY_COMPILER)
|
||||
/*
|
||||
* MIT Kerberos GSSAPI DLL doesn't properly export the symbols for MingW
|
||||
@ -629,17 +1054,12 @@ pg_GSS_recvauth(Port *port)
|
||||
|
||||
#endif /* ENABLE_GSS */
|
||||
|
||||
|
||||
/*----------------------------------------------------------------
|
||||
* SSPI authentication system
|
||||
*----------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifdef ENABLE_SSPI
|
||||
|
||||
typedef SECURITY_STATUS
|
||||
(WINAPI * QUERY_SECURITY_CONTEXT_TOKEN_FN) (
|
||||
PCtxtHandle, void **);
|
||||
|
||||
static void
|
||||
pg_SSPI_error(int severity, char *errmsg, SECURITY_STATUS r)
|
||||
{
|
||||
@ -935,271 +1355,6 @@ pg_SSPI_recvauth(Port *port)
|
||||
#endif /* ENABLE_SSPI */
|
||||
|
||||
|
||||
/*
|
||||
* Tell the user the authentication failed, but not (much about) why.
|
||||
*
|
||||
* There is a tradeoff here between security concerns and making life
|
||||
* unnecessarily difficult for legitimate users. We would not, for example,
|
||||
* want to report the password we were expecting to receive...
|
||||
* But it seems useful to report the username and authorization method
|
||||
* in use, and these are items that must be presumed known to an attacker
|
||||
* anyway.
|
||||
* Note that many sorts of failure report additional information in the
|
||||
* postmaster log, which we hope is only readable by good guys.
|
||||
*/
|
||||
static void
|
||||
auth_failed(Port *port, int status)
|
||||
{
|
||||
const char *errstr;
|
||||
|
||||
/*
|
||||
* If we failed due to EOF from client, just quit; there's no point in
|
||||
* trying to send a message to the client, and not much point in logging
|
||||
* the failure in the postmaster log. (Logging the failure might be
|
||||
* desirable, were it not for the fact that libpq closes the connection
|
||||
* unceremoniously if challenged for a password when it hasn't got one to
|
||||
* send. We'll get a useless log entry for every psql connection under
|
||||
* password auth, even if it's perfectly successful, if we log STATUS_EOF
|
||||
* events.)
|
||||
*/
|
||||
if (status == STATUS_EOF)
|
||||
proc_exit(0);
|
||||
|
||||
switch (port->auth_method)
|
||||
{
|
||||
case uaReject:
|
||||
errstr = gettext_noop("authentication failed for user \"%s\": host rejected");
|
||||
break;
|
||||
case uaKrb5:
|
||||
errstr = gettext_noop("Kerberos 5 authentication failed for user \"%s\"");
|
||||
break;
|
||||
case uaGSS:
|
||||
errstr = gettext_noop("GSSAPI authentication failed for user \"%s\"");
|
||||
break;
|
||||
case uaSSPI:
|
||||
errstr = gettext_noop("SSPI authentication failed for user \"%s\"");
|
||||
break;
|
||||
case uaTrust:
|
||||
errstr = gettext_noop("\"trust\" authentication failed for user \"%s\"");
|
||||
break;
|
||||
case uaIdent:
|
||||
errstr = gettext_noop("Ident authentication failed for user \"%s\"");
|
||||
break;
|
||||
case uaMD5:
|
||||
case uaCrypt:
|
||||
case uaPassword:
|
||||
errstr = gettext_noop("password authentication failed for user \"%s\"");
|
||||
break;
|
||||
#ifdef USE_PAM
|
||||
case uaPAM:
|
||||
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;
|
||||
}
|
||||
|
||||
ereport(FATAL,
|
||||
(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
|
||||
errmsg(errstr, port->user_name)));
|
||||
/* doesn't return */
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Client authentication starts here. If there is an error, this
|
||||
* function does not return and the backend process is terminated.
|
||||
*/
|
||||
void
|
||||
ClientAuthentication(Port *port)
|
||||
{
|
||||
int status = STATUS_ERROR;
|
||||
|
||||
/*
|
||||
* Get the authentication method to use for this frontend/database
|
||||
* combination. Note: a failure return indicates a problem with the hba
|
||||
* config file, not with the request. hba.c should have dropped an error
|
||||
* message into the postmaster logfile if it failed.
|
||||
*/
|
||||
if (hba_getauthmethod(port) != STATUS_OK)
|
||||
ereport(FATAL,
|
||||
(errcode(ERRCODE_CONFIG_FILE_ERROR),
|
||||
errmsg("missing or erroneous pg_hba.conf file"),
|
||||
errhint("See server log for details.")));
|
||||
|
||||
switch (port->auth_method)
|
||||
{
|
||||
case uaReject:
|
||||
|
||||
/*
|
||||
* This could have come from an explicit "reject" entry in
|
||||
* pg_hba.conf, but more likely it means there was no matching
|
||||
* entry. Take pity on the poor user and issue a helpful error
|
||||
* message. NOTE: this is not a security breach, because all the
|
||||
* info reported here is known at the frontend and must be assumed
|
||||
* known to bad guys. We're merely helping out the less clueful
|
||||
* good guys.
|
||||
*/
|
||||
{
|
||||
char hostinfo[NI_MAXHOST];
|
||||
|
||||
pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
|
||||
hostinfo, sizeof(hostinfo),
|
||||
NULL, 0,
|
||||
NI_NUMERICHOST);
|
||||
|
||||
#ifdef USE_SSL
|
||||
ereport(FATAL,
|
||||
(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
|
||||
errmsg("no pg_hba.conf entry for host \"%s\", user \"%s\", database \"%s\", %s",
|
||||
hostinfo, port->user_name, port->database_name,
|
||||
port->ssl ? _("SSL on") : _("SSL off"))));
|
||||
#else
|
||||
ereport(FATAL,
|
||||
(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
|
||||
errmsg("no pg_hba.conf entry for host \"%s\", user \"%s\", database \"%s\"",
|
||||
hostinfo, port->user_name, port->database_name)));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
|
||||
case uaKrb5:
|
||||
sendAuthRequest(port, AUTH_REQ_KRB5);
|
||||
status = pg_krb5_recvauth(port);
|
||||
break;
|
||||
|
||||
case uaGSS:
|
||||
sendAuthRequest(port, AUTH_REQ_GSS);
|
||||
status = pg_GSS_recvauth(port);
|
||||
break;
|
||||
|
||||
case uaSSPI:
|
||||
sendAuthRequest(port, AUTH_REQ_SSPI);
|
||||
status = pg_SSPI_recvauth(port);
|
||||
break;
|
||||
|
||||
case uaIdent:
|
||||
|
||||
/*
|
||||
* If we are doing ident on unix-domain sockets, use SCM_CREDS
|
||||
* only if it is defined and SO_PEERCRED isn't.
|
||||
*/
|
||||
#if !defined(HAVE_GETPEEREID) && !defined(SO_PEERCRED) && \
|
||||
(defined(HAVE_STRUCT_CMSGCRED) || defined(HAVE_STRUCT_FCRED) || \
|
||||
(defined(HAVE_STRUCT_SOCKCRED) && defined(LOCAL_CREDS)))
|
||||
if (port->raddr.addr.ss_family == AF_UNIX)
|
||||
{
|
||||
#if defined(HAVE_STRUCT_FCRED) || defined(HAVE_STRUCT_SOCKCRED)
|
||||
|
||||
/*
|
||||
* Receive credentials on next message receipt, BSD/OS,
|
||||
* NetBSD. We need to set this before the client sends the
|
||||
* next packet.
|
||||
*/
|
||||
int on = 1;
|
||||
|
||||
if (setsockopt(port->sock, 0, LOCAL_CREDS, &on, sizeof(on)) < 0)
|
||||
ereport(FATAL,
|
||||
(errcode_for_socket_access(),
|
||||
errmsg("could not enable credential reception: %m")));
|
||||
#endif
|
||||
|
||||
sendAuthRequest(port, AUTH_REQ_SCM_CREDS);
|
||||
}
|
||||
#endif
|
||||
status = authident(port);
|
||||
break;
|
||||
|
||||
case uaMD5:
|
||||
sendAuthRequest(port, AUTH_REQ_MD5);
|
||||
status = recv_and_check_password_packet(port);
|
||||
break;
|
||||
|
||||
case uaCrypt:
|
||||
sendAuthRequest(port, AUTH_REQ_CRYPT);
|
||||
status = recv_and_check_password_packet(port);
|
||||
break;
|
||||
|
||||
case uaPassword:
|
||||
sendAuthRequest(port, AUTH_REQ_PASSWORD);
|
||||
status = recv_and_check_password_packet(port);
|
||||
break;
|
||||
|
||||
#ifdef USE_PAM
|
||||
case uaPAM:
|
||||
pam_port_cludge = port;
|
||||
status = CheckPAMAuth(port, port->user_name, "");
|
||||
break;
|
||||
#endif /* USE_PAM */
|
||||
|
||||
#ifdef USE_LDAP
|
||||
case uaLDAP:
|
||||
status = CheckLDAPAuth(port);
|
||||
break;
|
||||
#endif
|
||||
|
||||
case uaTrust:
|
||||
status = STATUS_OK;
|
||||
break;
|
||||
}
|
||||
|
||||
if (status == STATUS_OK)
|
||||
sendAuthRequest(port, AUTH_REQ_OK);
|
||||
else
|
||||
auth_failed(port, status);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Send an authentication request packet to the frontend.
|
||||
*/
|
||||
static void
|
||||
sendAuthRequest(Port *port, AuthRequest areq)
|
||||
{
|
||||
StringInfoData buf;
|
||||
|
||||
pq_beginmessage(&buf, 'R');
|
||||
pq_sendint(&buf, (int32) areq, sizeof(int32));
|
||||
|
||||
/* Add the salt for encrypted passwords. */
|
||||
if (areq == AUTH_REQ_MD5)
|
||||
pq_sendbytes(&buf, port->md5Salt, 4);
|
||||
else if (areq == AUTH_REQ_CRYPT)
|
||||
pq_sendbytes(&buf, port->cryptSalt, 2);
|
||||
|
||||
#if defined(ENABLE_GSS) || defined(ENABLE_SSPI)
|
||||
|
||||
/*
|
||||
* Add the authentication data for the next step of the GSSAPI or SSPI
|
||||
* negotiation.
|
||||
*/
|
||||
else if (areq == AUTH_REQ_GSS_CONT)
|
||||
{
|
||||
if (port->gss->outbuf.length > 0)
|
||||
{
|
||||
elog(DEBUG4, "sending GSS token of length %u",
|
||||
(unsigned int) port->gss->outbuf.length);
|
||||
|
||||
pq_sendbytes(&buf, port->gss->outbuf.value, port->gss->outbuf.length);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
pq_endmessage(&buf);
|
||||
|
||||
/*
|
||||
* Flush message so client will see it, except for AUTH_REQ_OK, which need
|
||||
* not be sent until we are ready for queries.
|
||||
*/
|
||||
if (areq != AUTH_REQ_OK)
|
||||
pq_flush();
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------
|
||||
* Ident authentication system
|
||||
@ -1655,7 +1810,6 @@ authident(hbaPort *port)
|
||||
* PAM authentication system
|
||||
*----------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifdef USE_PAM
|
||||
|
||||
/*
|
||||
@ -1835,6 +1989,11 @@ CheckPAMAuth(Port *port, char *user, char *password)
|
||||
#endif /* USE_PAM */
|
||||
|
||||
|
||||
|
||||
/*----------------------------------------------------------------
|
||||
* LDAP authentication system
|
||||
*----------------------------------------------------------------
|
||||
*/
|
||||
#ifdef USE_LDAP
|
||||
|
||||
static int
|
||||
@ -2014,94 +2173,3 @@ CheckLDAPAuth(Port *port)
|
||||
}
|
||||
#endif /* USE_LDAP */
|
||||
|
||||
/*
|
||||
* Collect password response packet from frontend.
|
||||
*
|
||||
* Returns NULL if couldn't get password, else palloc'd string.
|
||||
*/
|
||||
static char *
|
||||
recv_password_packet(Port *port)
|
||||
{
|
||||
StringInfoData buf;
|
||||
|
||||
if (PG_PROTOCOL_MAJOR(port->proto) >= 3)
|
||||
{
|
||||
/* Expect 'p' message type */
|
||||
int mtype;
|
||||
|
||||
mtype = pq_getbyte();
|
||||
if (mtype != 'p')
|
||||
{
|
||||
/*
|
||||
* If the client just disconnects without offering a password,
|
||||
* don't make a log entry. This is legal per protocol spec and in
|
||||
* fact commonly done by psql, so complaining just clutters the
|
||||
* log.
|
||||
*/
|
||||
if (mtype != EOF)
|
||||
ereport(COMMERROR,
|
||||
(errcode(ERRCODE_PROTOCOL_VIOLATION),
|
||||
errmsg("expected password response, got message type %d",
|
||||
mtype)));
|
||||
return NULL; /* EOF or bad message type */
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* For pre-3.0 clients, avoid log entry if they just disconnect */
|
||||
if (pq_peekbyte() == EOF)
|
||||
return NULL; /* EOF */
|
||||
}
|
||||
|
||||
initStringInfo(&buf);
|
||||
if (pq_getmessage(&buf, 1000)) /* receive password */
|
||||
{
|
||||
/* EOF - pq_getmessage already logged a suitable message */
|
||||
pfree(buf.data);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Apply sanity check: password packet length should agree with length of
|
||||
* contained string. Note it is safe to use strlen here because
|
||||
* StringInfo is guaranteed to have an appended '\0'.
|
||||
*/
|
||||
if (strlen(buf.data) + 1 != buf.len)
|
||||
ereport(COMMERROR,
|
||||
(errcode(ERRCODE_PROTOCOL_VIOLATION),
|
||||
errmsg("invalid password packet size")));
|
||||
|
||||
/* Do not echo password to logs, for security. */
|
||||
ereport(DEBUG5,
|
||||
(errmsg("received password packet")));
|
||||
|
||||
/*
|
||||
* Return the received string. Note we do not attempt to do any
|
||||
* character-set conversion on it; since we don't yet know the client's
|
||||
* encoding, there wouldn't be much point.
|
||||
*/
|
||||
return buf.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Called when we have sent an authorization request for a password.
|
||||
* Get the response and check it.
|
||||
*/
|
||||
static int
|
||||
recv_and_check_password_packet(Port *port)
|
||||
{
|
||||
char *passwd;
|
||||
int result;
|
||||
|
||||
passwd = recv_password_packet(port);
|
||||
|
||||
if (passwd == NULL)
|
||||
return STATUS_EOF; /* client wouldn't send password */
|
||||
|
||||
result = md5_crypt_verify(port, port->user_name, passwd);
|
||||
|
||||
pfree(passwd);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user