Update cpk

fix bug and add demo code
2026-08-12 08:53:39 +08:00 · 2018-10-19 00:09:54 +08:00
parent f411936f9f
commit 89c826054b
5 changed files with 537 additions and 6 deletions
--- a/demos/cpk/cpk-verify.c
+++ b/demos/cpk/cpk-verify.c
@@ -0,0 +1,189 @@
+/* ====================================================================
+ * Copyright (c) 2018 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 <libgen.h>
+#include <openssl/cpk.h>
+
+int main(int argc, char **argv)
+{
+	int ret = -1;
+	char *prog = basename(argv[0]);
+	FILE *fp = NULL;
+	BIO *bio = NULL;
+	BIO *bio_mpk = NULL;
+	CPK_PUBLIC_PARAMS *mpk = NULL;
+	EVP_PKEY *pk = NULL;
+	EVP_MD_CTX *md_ctx = NULL;
+	EVP_PKEY_CTX *pctx;
+	unsigned char magicstr[] = "~CPK signature appended~";
+	unsigned char magic[sizeof(magicstr)] = {0};
+	unsigned char id[128];
+	unsigned char sig[128];
+	unsigned int idlen, siglen, totallen;
+	int datalen;
+
+	if (argc != 3) {
+		printf("usage: %s <signed-file> <mpk-file>\n", prog);
+		return 0;
+	}
+
+	if (!(fp = fopen(argv[1], "r"))) {
+		fprintf(stderr, "%s: open file failed\n", prog);
+		goto end;
+	}
+
+	if (fseek(fp, -(sizeof(magic) + sizeof(unsigned int)), SEEK_END) != 0) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+	if ((datalen = ftell(fp)) <= 0) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	if (fread(&totallen, sizeof(unsigned int), 1, fp) != sizeof(unsigned char)) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+	datalen -= totallen;
+
+	if (fread(magic, 1, sizeof(magic), fp) != sizeof(magic)) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	if (memcmp(magic, magicstr, sizeof(magic)) != 0) {
+		fprintf(stderr, "%s: file is not signed\n", prog);
+		goto end;
+	}
+
+	if (fseek(fp, datalen, SEEK_SET) != 0) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	if (fread(&idlen, 1, 4, fp) != 4) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	if (fread(id, 1, idlen, fp) != idlen) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	if (fread(&siglen, 1, sizeof(unsigned int), fp) != sizeof(unsigned int)) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+	if (fread(sig, 1, siglen, fp) != siglen) {
+		fprintf(stderr, "%s: parse file error\n", prog);
+		goto end;
+	}
+
+	fclose(fp);
+	fp = NULL;
+
+	if (!(bio = BIO_new_file(argv[1], "r"))
+		|| !(bio_mpk = BIO_new_file(argv[2], "r"))) {
+		ERR_print_errors_fp(stderr);
+		goto end;
+	}
+
+	if (!(mpk = d2i_CPK_PUBLIC_PARAMS_bio(bio_mpk, NULL))) {
+		ERR_print_errors_fp(stderr);
+		goto end;
+	}
+	if (!(pk = CPK_PUBLIC_PARAMS_extract_public_key(mpk, (char *)id))) {
+		ERR_print_errors_fp(stderr);
+		goto end;
+	}
+
+	if (!(md_ctx = EVP_MD_CTX_new())) {
+		ERR_print_errors_fp(stderr);
+		goto end;
+	}
+	if (!EVP_DigestVerifyInit(md_ctx, &pctx, EVP_sm3(), NULL, pk)) {
+		ERR_print_errors_fp(stderr);
+		goto end;
+	}
+
+	while (datalen > 0) {
+		unsigned char buf[1024];
+		int len;
+
+		len = sizeof(buf) < datalen ? sizeof(buf) : datalen;
+
+		if (len != BIO_read(bio, buf, len)) {
+			ERR_print_errors_fp(stderr);
+			goto end;
+		}
+
+		if (!EVP_DigestVerifyUpdate(md_ctx, buf, len)) {
+			ERR_print_errors_fp(stderr);
+			goto end;
+		}
+
+		datalen -= len;
+	}
+
+	if (1 != EVP_DigestVerifyFinal(md_ctx, sig, siglen)) {
+			ERR_print_errors_fp(stderr);
+			printf("%s: failed\n", argv[1]);
+			goto end;
+	}
+	printf("%s: success\n", argv[1]);
+
+
+	ret = 0;
+end:
+	return ret;
+}