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125 lines (110 loc) · 3.64 KB
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/*
* Copyright (c) 2020 - 2021 The GmSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the GmSSL Project.
* (http://gmssl.org/)"
*
* 4. The name "GmSSL Project" must not be used to endorse or promote
* products derived from this software without prior written
* permission. For written permission, please contact
* guanzhi1980@gmail.com.
*
* 5. Products derived from this software may not be called "GmSSL"
* nor may "GmSSL" appear in their names without prior written
* permission of the GmSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the GmSSL Project
* (http://gmssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/pem.h>
#include <gmssl/error.h>
int pem_write(FILE *fp, const char *name, const uint8_t *data, size_t datalen)
{
int ret = 0;
BASE64_CTX ctx;
uint8_t b64[datalen * 2];
int len;
base64_encode_init(&ctx);
base64_encode_update(&ctx, data, (int)datalen, b64, &len);
base64_encode_finish(&ctx, b64 + len, &len);
ret += fprintf(fp, "-----BEGIN %s-----\n", name);
ret += fprintf(fp, "%s", (char *)b64);
ret += fprintf(fp, "-----END %s-----\n", name);
//return ret;
return 1;
}
int pem_read(FILE *fp, const char *name, uint8_t *data, size_t *datalen, size_t maxlen)
{
char line[80];
char begin_line[80];
char end_line[80];
int len;
BASE64_CTX ctx;
snprintf(begin_line, sizeof(begin_line), "-----BEGIN %s-----\n", name);
snprintf(end_line, sizeof(end_line), "-----END %s-----\n", name);
if (feof(fp)) {
return 0;
}
if (!fgets(line, sizeof(line), fp)) {
if (feof(fp))
return 0;
else {
error_print();
return -1;
}
}
if (strcmp(line, begin_line) != 0) {
// FIXME: 这里是不是应该容忍一些错误呢？
error_print();
return -1;
}
*datalen = 0;
base64_decode_init(&ctx);
for (;;) {
if (!fgets(line, sizeof(line), fp)) {
error_print();
return -1;
}
if (strcmp(line, end_line) == 0) {
break;
}
base64_decode_update(&ctx, (uint8_t *)line, strlen(line), data, &len);
data += len;
*datalen += len;
}
base64_decode_finish(&ctx, data, &len);
*datalen += len;
return 1;
}