mirror of
https://github.com/guanzhi/GmSSL.git
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130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
/*
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* Copyright (c) 2020 - 2021 The GmSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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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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return 1;
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}
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int pem_read(FILE *fp, const char *name, uint8_t *data, size_t *datalen, size_t maxlen)
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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 (feof(fp)) {
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return 0;
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}
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if (!fgets(line, sizeof(line), fp)) {
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if (feof(fp))
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return 0;
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else {
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error_print();
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return -1;
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}
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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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fprintf(stderr, "%s %d: %s\n", __FILE__, __LINE__, line);
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fprintf(stderr, "%s %d: %s\n", __FILE__, __LINE__, begin_line);
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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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