CertificateParser.c

00001 // ----------------------------------------------------------------------------
00002 // Copyright 2016-2017 ARM Ltd.
00003 //
00004 // SPDX-License-Identifier: Apache-2.0
00005 //
00006 // Licensed under the Apache License, Version 2.0 (the "License");
00007 // you may not use this file except in compliance with the License.
00008 // You may obtain a copy of the License at
00009 //
00010 //     http://www.apache.org/licenses/LICENSE-2.0
00011 //
00012 // Unless required by applicable law or agreed to in writing, software
00013 // distributed under the License is distributed on an "AS IS" BASIS,
00014 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015 // See the License for the specific language governing permissions and
00016 // limitations under the License.
00017 // ----------------------------------------------------------------------------
00018 
00019 #include <stdint.h>
00020 #include "pal.h"
00021 #include "mbed-trace/mbed_trace.h"
00022 
00023 #define TRACE_GROUP "mClt"
00024 
00025 bool extract_cn_from_certificate(const uint8_t* cer, size_t cer_len, char* common_name)
00026 {
00027     tr_debug("extract_cn_from_certificate");
00028     palX509Handle_t cert;
00029     size_t len;
00030     palStatus_t ret;
00031 
00032     ret = pal_x509Initiate(&cert);
00033     if (ret != PAL_SUCCESS) {
00034         tr_error("extract_cn_from_certificate - cert init failed: %d", (int)ret);
00035         pal_x509Free(&cert);
00036         return false;
00037     }
00038     ret = pal_x509CertParse(cert, cer, cer_len);
00039     if (ret != PAL_SUCCESS) {
00040         tr_error("extract_cn_from_certificate - cert parse failed: %d", (int)ret);
00041         pal_x509Free(&cert);
00042         return false;
00043     }
00044     ret = pal_x509CertGetAttribute(cert, PAL_X509_CN_ATTR, common_name, 64, &len);
00045     if (ret != PAL_SUCCESS) {
00046         tr_error("extract_cn_from_certificate - cert attr get failed: %d", (int)ret);
00047         pal_x509Free(&cert);
00048         return false;
00049     }
00050     pal_x509Free(&cert);
00051     return true;
00052 }
00053