-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.110 2007/02/08 15:46:03 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.111 2007/02/16 02:59:40 momjian Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
</listitem>
</varlistentry>
+ <varlistentry id="guc-ssl-ciphers" xreflabel="ssl-ciphers">
+ <term><varname>ssl_ciphers> (<type>string</type>)</term>
+ <indexterm>
+ <primary><varname>ssl_ciphers</> configuration parameter</primary>
+ </indexterm>
+ <listitem>
+ <para>
+ Specifies a list of <acronym>SSL</> ciphers which can be used to
+ establish secure connections. See the <application>openssl</>
+ manual page for a list of supported ciphers.
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry id="guc-password-encryption" xreflabel="password_encryption">
<term><varname>password_encryption</varname> (<type>boolean</type>)</term>
<indexterm>
-<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.228 2007/02/06 03:03:11 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.229 2007/02/16 02:59:40 momjian Exp $ -->
<chapter id="libpq">
<title><application>libpq</application> - C Library</title>
</listitem>
<listitem>
<para>
+<indexterm>
+<primary><envar>PGSSLKEY</envar></primary>
+</indexterm>
+<envar>PGSSLKEY</envar>
+specifies the hardware token which stores the secret key for the client
+certificate, instead of a file. The value of this variable should consist
+of a colon-separated engine name (engines are <productname>OpenSSL</>
+loadable modules) and an engine-specific key identifier.
+</para>
+</listitem>
+<listitem>
+<para>
<indexterm>
<primary><envar>PGKRBSRVNAME</envar></primary>
</indexterm>
for increased security. See <xref linkend="ssl-tcp"> for details
about the server-side <acronym>SSL</> functionality.
</para>
-
+ <para>
+ <application>libpq</application> reads the system-wide
+ <productname>OpenSSL</productname> configuration file. By default, this
+ file is named <filename>openssl.cnf</filename> and is located in the
+ directory reported by <application>openssl</>:
+ <programlisting>
+ openssl version -d
+ </programlisting>
+ The default can be overriden by setting environment variable
+ <envar>OPENSSL_CONF</envar> to the name of the desired configuration
+ file.
+ </para>
<para>
If the server demands a client certificate,
<application>libpq</application>
will send the certificate stored in file
<filename>~/.postgresql/postgresql.crt</> within the user's home directory.
A matching private key file <filename>~/.postgresql/postgresql.key</>
- must also be present, and must not be world-readable.
+ must also be present, and must not be world-readable, unless the secret
+ key is stored in a hardware token, as specified by
+ <envar>PGSSLKEY</envar>.
(On Microsoft Windows these files are named
<filename>%APPDATA%\postgresql\postgresql.crt</filename> and
<filename>%APPDATA%\postgresql\postgresql.key</filename>.)
</para>
+ <para>
+ If the environment variable <envar>PGSSLKEY</envar> is set, its value
+ should consist of a colon-separated engine name and key identifier. In
+ this case, <application>libpq</application> will load the specified
+ engine, i.e. the <productname>OpenSSL</> module which supports special
+ hardware and reference the key with the specified identifier.
+ Identifiers are engine-specific. Typically, cryptography hardware tokens
+ do not reveal secret keys to the application. Instead, applications
+ delegate all cryptography operations which require the secret key to
+ the hardware token.
+ </para>
+
<para>
If the file <filename>~/.postgresql/root.crt</> is present in the user's
home directory,
-<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.376 2007/02/01 00:28:18 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.377 2007/02/16 02:59:40 momjian Exp $ -->
<chapter Id="runtime">
<title>Operating System Environment</title>
require use of <acronym>SSL</> for some or all connections.
</para>
+ <para>
+ <productname>OpenSSL</productname> supports a wide range of ciphers
+ and authentication algorithms, whose strength varies significantly.
+ You can restrict the list of ciphers which can be used to connect to
+ your server using the <xref linkend="guc-ssl-ciphers"> parameter.
+ </para>
+
+ <para>
+ <productname>PostgreSQL</productname> reads a system-wide
+ <productname>OpenSSL</productname> configuration file. By default this
+ file is named <filename>openssl.cnf</filename> and is located in the
+ directory reported by <application>openssl</>:
+ <programlisting>
+ openssl version -d
+ </programlisting>
+ This default can be overriden by setting environment variable
+ <envar>OPENSSL_CONF</envar> to the name of desired configuration file.
+ </para>
+
<para>
For details on how to create your server private key and certificate,
refer to the <productname>OpenSSL</> documentation. A
<programlisting>
openssl req -new -text -out server.req
</programlisting>
- Fill out the information that <command>openssl</> asks for. Make sure
- that you enter the local host name as <quote>Common Name</>; the challenge
+ Fill out the information that <application>openssl</> asks for. Make sure
+ you enter the local host name as <quote>Common Name</>; the challenge
password can be left blank. The program will generate a key that is
passphrase protected; it will not accept a passphrase that is less
than four characters long. To remove the passphrase (as you must if
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/libpq/be-secure.c,v 1.77 2007/02/07 00:52:35 petere Exp $
+ * $PostgreSQL: pgsql/src/backend/libpq/be-secure.c,v 1.78 2007/02/16 02:59:40 momjian Exp $
*
* Since the server static private key ($DataDir/server.key)
* will normally be stored unencrypted so that the database
#ifdef USE_SSL
#include <openssl/ssl.h>
#include <openssl/dh.h>
+#if SSLEAY_VERSION_NUMBER >= 0x0907000L
+#include <openssl/conf.h>
+#endif
+
#endif
#include "libpq/libpq.h"
#define RENEGOTIATION_LIMIT (512 * 1024 * 1024)
static SSL_CTX *SSL_context = NULL;
+
+/* GUC variable controlling SSL cipher list*/
+extern char *SSLCipherSuites;
+
#endif
/* ------------------------------------------------------------ */
if (!SSL_context)
{
+#if SSLEAY_VERSION_NUMBER >= 0x0907000L
+ OPENSSL_config(NULL);
+#endif
SSL_library_init();
SSL_load_error_strings();
SSL_context = SSL_CTX_new(SSLv23_method());
SSL_CTX_set_options(SSL_context, SSL_OP_SINGLE_DH_USE | SSL_OP_NO_SSLv2);
/* setup the allowed cipher list */
- if (SSL_CTX_set_cipher_list(SSL_context, "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH") != 1)
+ if (SSL_CTX_set_cipher_list(SSL_context, SSLCipherSuites) != 1)
elog(FATAL, "could not set the cipher list (no valid ciphers available)");
/*
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.523 2007/02/16 02:10:07 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.524 2007/02/16 02:59:41 momjian Exp $
*
* NOTES
*
/* still more option variables */
bool EnableSSL = false;
+char *SSLCipherSuites;
bool SilentMode = false; /* silent mode (-S) */
int PreAuthDelay = 0;
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.374 2007/02/14 03:08:44 neilc Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.375 2007/02/16 02:59:41 momjian Exp $
*
*--------------------------------------------------------------------
*/
NULL, assign_temp_tablespaces, NULL
},
+ {
+ {"ssl_ciphers", PGC_POSTMASTER, CONN_AUTH_SECURITY,
+ gettext_noop("Sets the list of allowed SSL ciphers."),
+ NULL,
+ GUC_SUPERUSER_ONLY
+ },
+ &SSLCipherSuites,
+ "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH", NULL, NULL
+ },
+
/* End-of-list marker */
{
{NULL, 0, 0, NULL, NULL}, NULL, NULL, NULL, NULL
#authentication_timeout = 1min # 1s-600s
#ssl = off # (change requires restart)
+#ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' # List of ciphers to use
#password_encryption = on
#db_user_namespace = off
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/postmaster/postmaster.h,v 1.15 2007/01/05 22:19:57 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/postmaster/postmaster.h,v 1.16 2007/02/16 02:59:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
/* GUC options */
extern bool EnableSSL;
+extern char *SSLCipherSuites;
extern bool SilentMode;
extern int ReservedBackends;
extern int PostPortNumber;
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.92 2007/02/08 11:10:27 petere Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.93 2007/02/16 02:59:41 momjian Exp $
*
* NOTES
* [ Most of these notes are wrong/obsolete, but perhaps not all ]
#ifdef USE_SSL
#include <openssl/ssl.h>
+#if (SSLEAY_VERSION_NUMBER >= 0x00907000L)
+#include <openssl/conf.h>
+#endif
+#if (SSLEAY_VERSION_NUMBER >= 0x00907000L) && !defined(OPENSSL_NO_ENGINE)
+#include <openssl/engine.h>
+#endif
#endif /* USE_SSL */
}
fclose(fp);
- /* read the user key */
- snprintf(fnbuf, sizeof(fnbuf), "%s/%s", homedir, USER_KEY_FILE);
- if (stat(fnbuf, &buf) == -1)
- {
- printfPQExpBuffer(&conn->errorMessage,
- libpq_gettext("certificate present, but not private key file \"%s\"\n"),
- fnbuf);
- return 0;
- }
-#ifndef WIN32
- if (!S_ISREG(buf.st_mode) || (buf.st_mode & 0077) ||
- buf.st_uid != geteuid())
- {
- printfPQExpBuffer(&conn->errorMessage,
- libpq_gettext("private key file \"%s\" has wrong permissions\n"),
- fnbuf);
- return 0;
- }
-#endif
- if ((fp = fopen(fnbuf, "r")) == NULL)
- {
- printfPQExpBuffer(&conn->errorMessage,
- libpq_gettext("could not open private key file \"%s\": %s\n"),
- fnbuf, pqStrerror(errno, sebuf, sizeof(sebuf)));
- return 0;
- }
-#ifndef WIN32
- if (fstat(fileno(fp), &buf2) == -1 ||
- buf.st_dev != buf2.st_dev || buf.st_ino != buf2.st_ino)
+#if (SSLEAY_VERSION_NUMBER >= 0x00907000L) && !defined(OPENSSL_NO_ENGINE)
+ if (getenv("PGSSLKEY"))
{
- printfPQExpBuffer(&conn->errorMessage,
- libpq_gettext("private key file \"%s\" changed during execution\n"), fnbuf);
- return 0;
+ /* read the user key from engine */
+ char *engine_env = getenv("PGSSLKEY");
+ char *engine_colon = strchr(engine_env, ':');
+ char *engine_str;
+ ENGINE *engine_ptr = NULL;
+
+ if (!engine_colon)
+ {
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("invalid value of PGSSLKEY environment variable\n"));
+ return 0;
+ }
+
+ engine_str = malloc(engine_colon - engine_env + 1);
+ strlcpy(engine_str, engine_env, engine_colon - engine_env + 1);
+ if ((engine_ptr = ENGINE_by_id(engine_str)) == NULL)
+ {
+ char *err = SSLerrmessage();
+
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("could not load SSL engine \"%s\":%s\n"), engine_str, err);
+ free(engine_str);
+ SSLerrfree(err);
+ return 0;
+ }
+ if ((*pkey = ENGINE_load_private_key(engine_ptr,
+ engine_colon + 1, NULL, NULL)) == NULL)
+ {
+ char *err = SSLerrmessage();
+
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("could not read private SSL key %s from engine \"%s\": %s\n"),
+ engine_colon + 1, engine_str, err);
+ SSLerrfree(err);
+ free(engine_str);
+ return 0;
+ }
+ free(engine_str);
}
+ else
#endif
- if (PEM_read_PrivateKey(fp, pkey, NULL, NULL) == NULL)
{
- char *err = SSLerrmessage();
+ /* read the user key from file*/
+ snprintf(fnbuf, sizeof(fnbuf), "%s/%s", homedir, USER_KEY_FILE);
+ if (stat(fnbuf, &buf) == -1)
+ {
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("certificate present, but not private key file \"%s\"\n"),
+ fnbuf);
+ return 0;
+ }
+ #ifndef WIN32
+ if (!S_ISREG(buf.st_mode) || (buf.st_mode & 0077) ||
+ buf.st_uid != geteuid())
+ {
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("private key file \"%s\" has wrong permissions\n"),
+ fnbuf);
+ return 0;
+ }
+ #endif
+ if ((fp = fopen(fnbuf, "r")) == NULL)
+ {
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("could not open private key file \"%s\": %s\n"),
+ fnbuf, pqStrerror(errno, sebuf, sizeof(sebuf)));
+ return 0;
+ }
+ #ifndef WIN32
+ if (fstat(fileno(fp), &buf2) == -1 ||
+ buf.st_dev != buf2.st_dev || buf.st_ino != buf2.st_ino)
+ {
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("private key file \"%s\" changed during execution\n"), fnbuf);
+ return 0;
+ }
+ #endif
+ if (PEM_read_PrivateKey(fp, pkey, NULL, NULL) == NULL)
+ {
+ char *err = SSLerrmessage();
- printfPQExpBuffer(&conn->errorMessage,
- libpq_gettext("could not read private key file \"%s\": %s\n"),
- fnbuf, err);
- SSLerrfree(err);
+ printfPQExpBuffer(&conn->errorMessage,
+ libpq_gettext("could not read private key file \"%s\": %s\n"),
+ fnbuf, err);
+ SSLerrfree(err);
+ fclose(fp);
+ return 0;
+ }
fclose(fp);
- return 0;
}
- fclose(fp);
-
/* verify that the cert and key go together */
if (!X509_check_private_key(*x509, *pkey))
{
{
if (pq_initssllib)
{
+#if (SSLEAY_VERSION_NUMBER >= 0x00907000L)
+ OPENSSL_config(NULL);
+#endif
SSL_library_init();
SSL_load_error_strings();
}
projects / postgresql / commitdiff