mirror of
https://github.com/guanzhi/GmSSL.git
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85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* Copyright 2014-2021 The GmSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gmssl/pem.h>
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#include <gmssl/error.h>
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int pem_write(FILE *fp, const char *name, const uint8_t *data, size_t datalen)
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{
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int ret = 0;
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BASE64_CTX ctx;
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uint8_t b64[datalen * 2];
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int len;
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base64_encode_init(&ctx);
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base64_encode_update(&ctx, data, (int)datalen, b64, &len);
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base64_encode_finish(&ctx, b64 + len, &len);
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ret += fprintf(fp, "-----BEGIN %s-----\n", name);
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ret += fprintf(fp, "%s", (char *)b64);
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ret += fprintf(fp, "-----END %s-----\n", name);
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return ret;
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}
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int pem_read(FILE *fp, const char *name, uint8_t *data, size_t *datalen)
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{
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char line[80];
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char begin_line[80];
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char end_line[80];
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int len;
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BASE64_CTX ctx;
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snprintf(begin_line, sizeof(begin_line), "-----BEGIN %s-----\n", name);
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snprintf(end_line, sizeof(end_line), "-----END %s-----\n", name);
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if (!fgets(line, sizeof(line), fp)) {
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//FIXME: feof 判断是不是文件结束了呢
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return 0;
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}
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if (strcmp(line, begin_line) != 0) {
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// FIXME: 这里是不是应该容忍一些错误呢？
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error_print();
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return -1;
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}
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*datalen = 0;
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base64_decode_init(&ctx);
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for (;;) {
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if (!fgets(line, sizeof(line), fp)) {
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error_print();
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return -1;
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}
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if (strcmp(line, end_line) == 0) {
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break;
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}
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base64_decode_update(&ctx, (uint8_t *)line, strlen(line), data, &len);
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data += len;
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*datalen += len;
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}
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base64_decode_finish(&ctx, data, &len);
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*datalen += len;
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return 1;
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}
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