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Diffstat (limited to 'src/openvpn/ssl_verify_polarssl.c')
-rw-r--r--src/openvpn/ssl_verify_polarssl.c397
1 files changed, 0 insertions, 397 deletions
diff --git a/src/openvpn/ssl_verify_polarssl.c b/src/openvpn/ssl_verify_polarssl.c
deleted file mode 100644
index 7ed87d6..0000000
--- a/src/openvpn/ssl_verify_polarssl.c
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
- * OpenVPN -- An application to securely tunnel IP networks
- * over a single TCP/UDP port, with support for SSL/TLS-based
- * session authentication and key exchange,
- * packet encryption, packet authentication, and
- * packet compression.
- *
- * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- * Copyright (C) 2010 Fox Crypto B.V. <openvpn@fox-it.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/**
- * @file Control Channel Verification Module PolarSSL backend
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#elif defined(_MSC_VER)
-#include "config-msvc.h"
-#endif
-
-#include "syshead.h"
-
-#if defined(ENABLE_SSL) && defined(ENABLE_CRYPTO_POLARSSL)
-
-#include "ssl_verify.h"
-#include <polarssl/bignum.h>
-#include <polarssl/error.h>
-#include <polarssl/oid.h>
-#include <polarssl/sha1.h>
-
-#define MAX_SUBJECT_LENGTH 256
-
-int
-verify_callback (void *session_obj, x509_crt *cert, int cert_depth,
- int *flags)
-{
- struct tls_session *session = (struct tls_session *) session_obj;
- struct gc_arena gc = gc_new();
-
- ASSERT (cert);
- ASSERT (session);
-
- session->verified = false;
-
- /* Remember certificate hash */
- cert_hash_remember (session, cert_depth, x509_get_sha1_hash(cert, &gc));
-
- /* did peer present cert which was signed by our root cert? */
- if (*flags != 0)
- {
- char *subject = x509_get_subject(cert, &gc);
-
- if (subject)
- msg (D_TLS_ERRORS, "VERIFY ERROR: depth=%d, flags=%x, %s", cert_depth, *flags, subject);
- else
- msg (D_TLS_ERRORS, "VERIFY ERROR: depth=%d, flags=%x, could not extract X509 "
- "subject string from certificate", *flags, cert_depth);
-
- /* Leave flags set to non-zero to indicate that the cert is not ok */
- }
- else if (SUCCESS != verify_cert(session, cert, cert_depth))
- {
- *flags |= BADCERT_OTHER;
- }
-
- gc_free(&gc);
-
- /*
- * PolarSSL-1.2.0+ expects 0 on anything except fatal errors.
- */
- return 0;
-}
-
-#ifdef ENABLE_X509ALTUSERNAME
-# warning "X509 alt user name not yet supported for PolarSSL"
-#endif
-
-result_t
-backend_x509_get_username (char *cn, int cn_len,
- char *x509_username_field, x509_crt *cert)
-{
- x509_name *name;
-
- ASSERT( cn != NULL );
-
- name = &cert->subject;
-
- /* Find common name */
- while( name != NULL )
- {
- if( memcmp( name->oid.p, OID_AT_CN, OID_SIZE(OID_AT_CN) ) == 0)
- break;
-
- name = name->next;
- }
-
- /* Not found, return an error if this is the peer's certificate */
- if( name == NULL )
- return FAILURE;
-
- /* Found, extract CN */
- if (cn_len > name->val.len)
- memcpy( cn, name->val.p, name->val.len );
- else
- {
- memcpy( cn, name->val.p, cn_len);
- cn[cn_len-1] = '\0';
- }
-
- return SUCCESS;
-}
-
-char *
-backend_x509_get_serial (openvpn_x509_cert_t *cert, struct gc_arena *gc)
-{
- char *buf = NULL;
- size_t buflen = 0;
- mpi serial_mpi = { 0 };
-
- /* Transform asn1 integer serial into PolarSSL MPI */
- mpi_init(&serial_mpi);
- if (!polar_ok(mpi_read_binary(&serial_mpi, cert->serial.p, cert->serial.len)))
- {
- msg(M_WARN, "Failed to retrieve serial from certificate.");
- return NULL;
- }
-
- /* Determine decimal representation length, allocate buffer */
- mpi_write_string(&serial_mpi, 10, buf, &buflen);
- buf = gc_malloc(buflen, true, gc);
-
- /* Write MPI serial as decimal string into buffer */
- if (!polar_ok(mpi_write_string(&serial_mpi, 10, buf, &buflen)))
- {
- msg(M_WARN, "Failed to write serial to string.");
- return NULL;
- }
-
- return buf;
-}
-
-char *
-backend_x509_get_serial_hex (openvpn_x509_cert_t *cert, struct gc_arena *gc)
-{
- char *buf = NULL;
- size_t len = cert->serial.len * 3 + 1;
-
- buf = gc_malloc(len, true, gc);
-
- if(x509_serial_gets(buf, len-1, &cert->serial) < 0)
- buf = NULL;
-
- return buf;
-}
-
-unsigned char *
-x509_get_sha1_hash (x509_crt *cert, struct gc_arena *gc)
-{
- unsigned char *sha1_hash = gc_malloc(SHA_DIGEST_LENGTH, false, gc);
- sha1(cert->tbs.p, cert->tbs.len, sha1_hash);
- return sha1_hash;
-}
-
-char *
-x509_get_subject(x509_crt *cert, struct gc_arena *gc)
-{
- char tmp_subject[MAX_SUBJECT_LENGTH] = {0};
- char *subject = NULL;
-
- int ret = 0;
-
- ret = x509_dn_gets( tmp_subject, MAX_SUBJECT_LENGTH-1, &cert->subject );
- if (ret > 0)
- {
- /* Allocate the required space for the subject */
- subject = string_alloc(tmp_subject, gc);
- }
-
- return subject;
-}
-
-/*
- * Save X509 fields to environment, using the naming convention:
- *
- * X509_{cert_depth}_{name}={value}
- */
-void
-x509_setenv (struct env_set *es, int cert_depth, openvpn_x509_cert_t *cert)
-{
- int i;
- unsigned char c;
- const x509_name *name;
- char s[128];
-
- name = &cert->subject;
-
- memset( s, 0, sizeof( s ) );
-
- while( name != NULL )
- {
- char name_expand[64+8];
- const char *shortname;
-
- if( 0 == oid_get_attr_short_name(&name->oid, &shortname) )
- {
- openvpn_snprintf (name_expand, sizeof(name_expand), "X509_%d_%s",
- cert_depth, shortname);
- }
- else
- {
- openvpn_snprintf (name_expand, sizeof(name_expand), "X509_%d_\?\?",
- cert_depth);
- }
-
- for( i = 0; i < name->val.len; i++ )
- {
- if( i >= (int) sizeof( s ) - 1 )
- break;
-
- c = name->val.p[i];
- if( c < 32 || c == 127 || ( c > 128 && c < 160 ) )
- s[i] = '?';
- else s[i] = c;
- }
- s[i] = '\0';
-
- /* Check both strings, set environment variable */
- string_mod (name_expand, CC_PRINT, CC_CRLF, '_');
- string_mod ((char*)s, CC_PRINT, CC_CRLF, '_');
- setenv_str (es, name_expand, (char*)s);
-
- name = name->next;
- }
-}
-
-result_t
-x509_verify_ns_cert_type(const x509_crt *cert, const int usage)
-{
- if (usage == NS_CERT_CHECK_NONE)
- return SUCCESS;
- if (usage == NS_CERT_CHECK_CLIENT)
- return ((cert->ext_types & EXT_NS_CERT_TYPE)
- && (cert->ns_cert_type & NS_CERT_TYPE_SSL_CLIENT)) ? SUCCESS : FAILURE;
- if (usage == NS_CERT_CHECK_SERVER)
- return ((cert->ext_types & EXT_NS_CERT_TYPE)
- && (cert->ns_cert_type & NS_CERT_TYPE_SSL_SERVER)) ? SUCCESS : FAILURE;
-
- return FAILURE;
-}
-
-result_t
-x509_verify_cert_ku (x509_crt *cert, const unsigned * const expected_ku,
- int expected_len)
-{
- result_t fFound = FAILURE;
-
- if(!(cert->ext_types & EXT_KEY_USAGE))
- {
- msg (D_HANDSHAKE, "Certificate does not have key usage extension");
- }
- else
- {
- int i;
- unsigned nku = cert->key_usage;
-
- msg (D_HANDSHAKE, "Validating certificate key usage");
- for (i=0; SUCCESS != fFound && i<expected_len; i++)
- {
- if (expected_ku[i] != 0)
- {
- msg (D_HANDSHAKE, "++ Certificate has key usage %04x, expects "
- "%04x", nku, expected_ku[i]);
-
- if (nku == expected_ku[i])
- {
- fFound = SUCCESS;
- }
- }
- }
- }
- return fFound;
-}
-
-result_t
-x509_verify_cert_eku (x509_crt *cert, const char * const expected_oid)
-{
- result_t fFound = FAILURE;
-
- if (!(cert->ext_types & EXT_EXTENDED_KEY_USAGE))
- {
- msg (D_HANDSHAKE, "Certificate does not have extended key usage extension");
- }
- else
- {
- x509_sequence *oid_seq = &(cert->ext_key_usage);
-
- msg (D_HANDSHAKE, "Validating certificate extended key usage");
- while (oid_seq != NULL)
- {
- x509_buf *oid = &oid_seq->buf;
- char oid_num_str[1024];
- const char *oid_str;
-
- if (0 == oid_get_extended_key_usage( oid, &oid_str ))
- {
- msg (D_HANDSHAKE, "++ Certificate has EKU (str) %s, expects %s",
- oid_str, expected_oid);
- if (!strcmp (expected_oid, oid_str))
- {
- fFound = SUCCESS;
- break;
- }
- }
-
- if (0 < oid_get_numeric_string( oid_num_str,
- sizeof (oid_num_str), oid))
- {
- msg (D_HANDSHAKE, "++ Certificate has EKU (oid) %s, expects %s",
- oid_num_str, expected_oid);
- if (!strcmp (expected_oid, oid_num_str))
- {
- fFound = SUCCESS;
- break;
- }
- }
- oid_seq = oid_seq->next;
- }
- }
-
- return fFound;
-}
-
-result_t
-x509_write_pem(FILE *peercert_file, x509_crt *peercert)
-{
- msg (M_WARN, "PolarSSL does not support writing peer certificate in PEM format");
- return FAILURE;
-}
-
-/*
- * check peer cert against CRL
- */
-result_t
-x509_verify_crl(const char *crl_file, x509_crt *cert, const char *subject)
-{
- result_t retval = FAILURE;
- x509_crl crl = {0};
- struct gc_arena gc = gc_new();
- char *serial;
-
- if (!polar_ok(x509_crl_parse_file(&crl, crl_file)))
- {
- msg (M_WARN, "CRL: cannot read CRL from file %s", crl_file);
- goto end;
- }
-
- if(cert->issuer_raw.len != crl.issuer_raw.len ||
- memcmp(crl.issuer_raw.p, cert->issuer_raw.p, crl.issuer_raw.len) != 0)
- {
- msg (M_WARN, "CRL: CRL %s is from a different issuer than the issuer of "
- "certificate %s", crl_file, subject);
- retval = SUCCESS;
- goto end;
- }
-
- if (!polar_ok(x509_crt_revoked(cert, &crl)))
- {
- serial = backend_x509_get_serial_hex(cert, &gc);
- msg (D_HANDSHAKE, "CRL CHECK FAILED: %s (serial %s) is REVOKED", subject, (serial ? serial : "NOT AVAILABLE"));
- goto end;
- }
-
- retval = SUCCESS;
- msg (D_HANDSHAKE, "CRL CHECK OK: %s",subject);
-
-end:
- gc_free(&gc);
- x509_crl_free(&crl);
- return retval;
-}
-
-#endif /* #if defined(ENABLE_SSL) && defined(ENABLE_CRYPTO_POLARSSL) */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 19:17:13 +0000