/*

* Copyright (c) 2021 - 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 <errno.h>

#include <string.h>

#include <stdlib.h>

#include <sys/stat.h>

#include <gmssl/x509.h>

#include <gmssl/cms.h>

#include <gmssl/error.h>

/*

302 typedef struct {

303 uint8_t *certs;

304 size_t certs_len;

305 SM2_KEY *sign_key;

306 } CMS_CERTS_AND_KEY;

输出长度主要由输入长度和

*/

static const char *options = "-key file -pass str -cert file -in file [-out file]";

int cmssign_main(int argc, char **argv)

{

int ret = 1;

char *prog = argv[0];

char *keyfile = NULL;

char *pass = NULL;

char *certfile = NULL;

char *infile = NULL;

char *outfile = NULL;

FILE *keyfp = NULL;

FILE *certfp = NULL;

FILE *infp = NULL;

FILE *outfp = stdout;

SM2_KEY key;

uint8_t cert[1024];

size_t certlen;

struct stat st;

uint8_t *in = NULL;

size_t inlen;

uint8_t *cms = NULL;

size_t cmslen, cms_maxlen;

CMS_CERTS_AND_KEY cert_and_key;

int content_type;

uint8_t *content = NULL;

size_t content_len;

const uint8_t *rcpt_infos;

size_t rcpt_infos_len;

const uint8_t *shared_info1;

const uint8_t *shared_info2;

size_t shared_info1_len, shared_info2_len;

argc--;

argv++;

if (argc < 1) {

fprintf(stderr, "usage: %s %s\n", prog, options);

return 1;

}

while (argc > 1) {

if (!strcmp(*argv, "-help")) {

printf("usage: %s %s\n", prog, options);

ret = 0;

goto end;

} else if (!strcmp(*argv, "-key")) {

if (--argc < 1) goto bad;

keyfile = *(++argv);

if (!(keyfp = fopen(keyfile, "r"))) {

fprintf(stderr, "%s: open '%s' failure : %s\n", prog, keyfile, strerror(errno));

goto end;

}

} else if (!strcmp(*argv, "-pass")) {

if (--argc < 1) goto bad;

pass = *(++argv);

} else if (!strcmp(*argv, "-cert")) {

if (--argc < 1) goto bad;

certfile = *(++argv);

if (!(certfp = fopen(certfile, "r"))) {

fprintf(stderr, "%s: open '%s' failure : %s\n", prog, certfile, strerror(errno));

goto end;

}

} else if (!strcmp(*argv, "-in")) {

if (--argc < 1) goto bad;

infile = *(++argv);

if (!(infp = fopen(infile, "r"))) {

fprintf(stderr, "%s: open '%s' failure : %s\n", prog, infile, strerror(errno));

goto end;

}

} else if (!strcmp(*argv, "-out")) {

if (--argc < 1) goto bad;

outfile = *(++argv);

if (!(outfp = fopen(outfile, "w"))) {

fprintf(stderr, "%s: open '%s' failure : %s\n", prog, outfile, strerror(errno));

goto end;

}

} else {

fprintf(stderr, "%s: illegal option '%s'\n", prog, *argv);

goto end;

bad:

fprintf(stderr, "%s: '%s' option value missing\n", prog, *argv);

goto end;

}

argc--;

argv++;

}

if (!keyfile) {

fprintf(stderr, "%s: '-key' option required\n", prog);

goto end;

}

if (!pass) {

fprintf(stderr, "%s: '-pass' option required\n", prog);

goto end;

}

if (!certfile) {

fprintf(stderr, "%s: '-cert' option required\n", prog);

goto end;

}

if (!infile) {

fprintf(stderr, "%s: '-in' option required\n", prog);

goto end;

}

if (sm2_private_key_info_decrypt_from_pem(&key, pass, keyfp) != 1) {

fprintf(stderr, "%s: private key decryption failure\n", prog);

goto end;

}

if (x509_cert_from_pem(cert, &certlen, sizeof(cert), certfp) != 1) {

fprintf(stderr, "%s: load certificate failure\n", prog);

goto end;

}

{

SM2_KEY public_key;

if (x509_cert_get_subject_public_key(cert, certlen, &public_key) != 1) {

fprintf(stderr, "%s: parse certficate failure\n", prog);

goto end;

}

if (sm2_public_key_equ(&key, &public_key) != 1) {

fprintf(stderr, "%s: key and cert are not match!\n", prog);

goto end;

}

}

cert_and_key.certs = cert;

cert_and_key.certs_len = certlen;

cert_and_key.sign_key = &key;

if (fstat(fileno(infp), &st) < 0) {

fprintf(stderr, "%s: access file error : %s\n", prog, strerror(errno));

goto end;

}

if ((inlen = st.st_size) <= 0) {

fprintf(stderr, "%s: invalid input length\n", prog);

goto end;

}

if (!(in = malloc(inlen))) {

fprintf(stderr, "%s: malloc failure\n", prog);

goto end;

}

if (fread(in, 1, inlen, infp) != inlen) {

fprintf(stderr, "%s: read file error : %s\n", prog, strerror(errno));

goto end;

}

cms_maxlen = (inlen * 4)/3 + 4096; // 主要由SignerInfos，其中的DN长度决定

if (!(cms = malloc(cms_maxlen))) {

fprintf(stderr, "%s: malloc failure\n", prog);

goto end;

}

if (cms_sign(cms, &cmslen, &cert_and_key, 1, OID_cms_data, in, inlen, NULL, 0) != 1) {

fprintf(stderr, "%s: sign failure\n", prog);

goto end;

}

if (cms_to_pem(cms, cmslen, outfp) != 1) {

fprintf(stderr, "%s: output failure\n", prog);

goto end;

}

ret = 0;

end:

if (infile && infp) fclose(infp);

if (outfile && outfp) fclose(outfp);

if (keyfile && keyfp) fclose(keyfp);

if (cms) free(cms);

if (in) free(in);

return ret;

}