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+/* vi: set noexpandtab sw=4 sts=4: */
+/* opkg_pathfinder.c - the opkg package management system
+
+ Copyright (C) 2009 Camille Moncelier <moncelier@devlife.org>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ 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.
+*/
+#include "config.h"
+
+#include <openssl/ssl.h>
+#include <libpathfinder.h>
+#include <stdlib.h>
+#if defined(HAVE_SSLCURL)
+#include <curl/curl.h>
+#endif
+
+#include "libbb/libbb.h"
+#include "opkg_message.h"
+
+#if defined(HAVE_SSLCURL) || defined(HAVE_OPENSSL)
+/*
+ * This callback is called instead of X509_verify_cert to perform path
+ * validation on a certificate using pathfinder.
+ *
+ */
+static int pathfinder_verify_callback(X509_STORE_CTX *ctx, void *arg)
+{
+ char *errmsg;
+ const char *hex = "0123456789ABCDEF";
+ size_t size = i2d_X509(ctx->cert, NULL);
+ unsigned char *keybuf, *iend;
+ iend = keybuf = xmalloc(size);
+ i2d_X509(ctx->cert, &iend);
+ char *certdata_str = xmalloc(size * 2 + 1);
+ unsigned char *cp = keybuf;
+ char *certdata_str_i = certdata_str;
+ while (cp < iend)
+ {
+ unsigned char ch = *cp++;
+ *certdata_str_i++ = hex[(ch >> 4) & 0xf];
+ *certdata_str_i++ = hex[ch & 0xf];
+ }
+ *certdata_str_i = 0;
+ free(keybuf);
+
+ const char *policy = "2.5.29.32.0"; // anyPolicy
+ int validated = pathfinder_dbus_verify(certdata_str, policy, 0, 0, &errmsg);
+
+ if (!validated)
+ opkg_msg(ERROR, "Path verification failed: %s.\n", errmsg);
+
+ free(certdata_str);
+ free(errmsg);
+
+ return validated;
+}
+#endif
+
+#if defined(HAVE_OPENSSL)
+int pkcs7_pathfinder_verify_signers(PKCS7* p7)
+{
+ STACK_OF(X509) *signers;
+ int i, ret = 1; /* signers are verified by default */
+
+ signers = PKCS7_get0_signers(p7, NULL, 0);
+
+ for(i = 0; i < sk_X509_num(signers); i++){
+ X509_STORE_CTX ctx = {
+ .cert = sk_X509_value(signers, i),
+ };
+
+ if(!pathfinder_verify_callback(&ctx, NULL)){
+ /* Signer isn't verified ! goto jail; */
+ ret = 0;
+ break;
+ }
+ }
+
+ sk_X509_free(signers);
+ return ret;
+}
+#endif
+
+#if defined(HAVE_SSLCURL)
+CURLcode curl_ssl_ctx_function(CURL * curl, void * sslctx, void * parm) {
+
+ SSL_CTX * ctx = (SSL_CTX *) sslctx;
+ SSL_CTX_set_cert_verify_callback(ctx, pathfinder_verify_callback, parm);
+
+ return CURLE_OK ;
+}
+#endif