/* vi: set noexpandtab sw=4 sts=4: */ /* opkg_pathfinder.c - the opkg package management system Copyright (C) 2009 Camille Moncelier 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 #include #include #if defined(HAVE_SSLCURL) #include #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