mirror of
https://github.com/guanzhi/GmSSL.git
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92 lines
2.1 KiB
C
92 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 <unistd.h>
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#include <gmssl/hex.h>
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#include <gmssl/sm2.h>
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#include <gmssl/pem.h>
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#include <gmssl/pkcs8.h>
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#include <gmssl/error.h>
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int main(int argc, char **argv)
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{
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char *prog = argv[0];
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const char *keyfile = NULL;
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FILE *keyfp = NULL;
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const char *pass = NULL;
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SM2_KEY key;
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char hexbuf[SM2_MAX_CIPHERTEXT_SIZE * 2];
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uint8_t inbuf[SM2_MAX_CIPHERTEXT_SIZE * 2];
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uint8_t outbuf[SM2_MAX_CIPHERTEXT_SIZE];
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size_t hexlen, inlen, outlen;
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if (argc < 2) {
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bad:
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fprintf(stderr, "%s : error options\n", prog);
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help:
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fprintf(stderr, "usage: %s -key key.pem [-id str] < file\n", prog);
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return 1;
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}
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argc--;
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argv++;
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while (argc > 1) {
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if (!strcmp(*argv, "-help")) {
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goto help;
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} else if (!strcmp(*argv, "-key")) {
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if (--argc < 1) goto bad;
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keyfile = *(++argv);
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} else {
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goto help;
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}
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argc--;
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argv++;
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}
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if (!keyfile) {
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error_print();
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return -1;
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}
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if (!(keyfp = fopen(keyfile, "r"))) {
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error_print();
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return -1;
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}
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pass = getpass("Encryption Password : ");
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if (sm2_enced_private_key_info_from_pem(&key, pass, keyfp) != 1) {
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error_puts("private key decryption failure");
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return -1;
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}
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if ((hexlen = fread(hexbuf, 1, sizeof(hexbuf), stdin)) <= 0) {
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error_print();
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return -1;
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}
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if (hex2bin(hexbuf, hexlen, inbuf) != 1) {
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error_print();
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return -1;
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}
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if (sm2_decrypt(&key, inbuf, hexlen/2, outbuf, &outlen) != 1) {
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error_print();
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return -1;
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}
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fwrite(outbuf, 1, outlen, stdout);
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return 0;
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}
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