Add sm4_ctr gmssl option

tools/gmssl.c

@@ -36,6 +36,7 @@ extern int sm3_main(int argc, char **argv);
 extern int sm3hmac_main(int argc, char **argv);
 extern int sm3xmss_keygen_main(int argc, char **argv);
 extern int sm4_main(int argc, char **argv);
+extern int sm4_ctr_main(int argc, char **argv);
 extern int zuc_main(int argc, char **argv);
 extern int sm9setup_main(int argc, char **argv);
 extern int sm9keygen_main(int argc, char **argv);
@@ -78,6 +79,7 @@ static const char *options =
 	"  sm3hmac         Generate SM3 HMAC tag\n"
 	"  sm3xmss_keygen  Generate SM3-XMSS keypair\n"
 	"  sm4             Encrypt or decrypt with SM4\n"
+	"  sm4_ctr         Encrypt or decrypt with SM4 CTR\n"
 	"  zuc             Encrypt or decrypt with ZUC\n"
 	"  sm9setup        Generate SM9 master secret\n"
 	"  sm9keygen       Generate SM9 private key\n"
@@ -182,6 +184,8 @@ int main(int argc, char **argv)
 			return sm3xmss_keygen_main(argc, argv);
 		} else if (!strcmp(*argv, "sm4")) {
 			return sm4_main(argc, argv);
+		} else if (!strcmp(*argv, "sm4_ctr")) {
+			return sm4_ctr_main(argc, argv);
 		} else if (!strcmp(*argv, "zuc")) {
 			return zuc_main(argc, argv);
 		} else if (!strcmp(*argv, "sm9setup")) {

tools/sm4_ctr.c

@@ -0,0 +1,171 @@
+/*
+ *  Copyright 2014-2024 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <gmssl/sm4.h>
+#include <gmssl/mem.h>
+#include <gmssl/hex.h>
+#include <gmssl/error.h>
+
+
+static const char *usage = "-key hex -iv hex [-in file] [-out file]";
+
+static const char *options =
+"Options\n"
+"\n"
+"    -encrypt            Encrypt\n"
+"    -decrypt            Decrypt\n"
+"    -key hex            Symmetric key in HEX format\n"
+"    -iv hex             IV in HEX format\n"
+"    -in file | stdin    Input data\n"
+"    -out file | stdout  Output data\n"
+"\n"
+"Examples"
+"\n"
+"  echo \"hello\" | gmssl sm4_ctr -key 11223344556677881122334455667788 -iv 112233445566778811223344 -out ciphertext.bin\n"
+"\n";
+
+int sm4_ctr_main(int argc, char **argv)
+{
+	int ret = 1;
+	char *prog = argv[0];
+	char *keyhex = NULL;
+	char *ivhex = NULL;
+	char *infile = NULL;
+	char *outfile = NULL;
+
+	uint8_t key[16];
+	size_t keylen;
+	uint8_t iv[16];
+	size_t ivlen;
+	FILE *infp = stdin;
+	FILE *outfp = stdout;
+
+	SM4_CTR_CTX ctx;
+	uint8_t inbuf[4096];
+	size_t inlen;
+	uint8_t outbuf[4096]; // should sizeof(outbuf) > sizeof(inbuf) ?		
+	size_t outlen;
+
+	argc--;
+	argv++;
+
+	if (argc < 1) {
+		fprintf(stderr, "usage: %s %s\n", prog, usage);
+		return 1;
+	}
+
+	while (argc > 0) {
+		if (!strcmp(*argv, "-help")) {
+			printf("usage: gmssl %s %s\n", prog, usage);
+			printf("%s\n", options);
+			ret = 0;
+			goto end;
+		} else if (!strcmp(*argv, "-key")) {
+			if (--argc < 1) goto bad;
+			keyhex = *(++argv);
+			if (strlen(keyhex) != sizeof(key) * 2) {
+				fprintf(stderr, "%s: invalid key length\n", prog);
+				goto end;
+			}
+			if (hex_to_bytes(keyhex, strlen(keyhex), key, &keylen) != 1) {
+				fprintf(stderr, "%s: invalid key hex digits\n", prog);
+				goto end;
+			}
+		} else if (!strcmp(*argv, "-iv")) {
+			if (--argc < 1) goto bad;
+			ivhex = *(++argv);
+			if (strlen(ivhex) != sizeof(iv) * 2) {
+				fprintf(stderr, "%s: invalid IV length\n", prog);
+				goto end;
+			}
+			if (hex_to_bytes(ivhex, strlen(ivhex), iv, &ivlen) != 1) {
+				fprintf(stderr, "%s: invalid IV hex digits\n", prog);
+				goto end;
+			}
+		} else if (!strcmp(*argv, "-encrypt")) {
+			// ignore this option
+		} else if (!strcmp(*argv, "-decrypt")) {
+			// ignore this option
+		} else if (!strcmp(*argv, "-in")) {
+			if (--argc < 1) goto bad;
+			infile = *(++argv);
+			if (!(infp = fopen(infile, "rb"))) {
+				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, "wb"))) {
+				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 (!keyhex) {
+		fprintf(stderr, "%s: option `-key` missing\n", prog);
+		goto end;
+	}
+	if (!ivhex) {
+		fprintf(stderr, "%s: option `-iv` missing\n", prog);
+		goto end;
+	}
+
+	if (sm4_ctr_encrypt_init(&ctx, key, iv) != 1) {
+		error_print();
+		goto end;
+	}
+
+	while ((inlen = fread(inbuf, 1, sizeof(inbuf), infp)) > 0) {
+		if (sm4_ctr_encrypt_update(&ctx, inbuf, inlen, outbuf, &outlen) != 1) {
+			error_print();
+			goto end;
+		}
+		if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
+			fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
+			goto end;
+		}
+	}
+
+	if (sm4_ctr_encrypt_finish(&ctx, outbuf, &outlen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
+		fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
+		goto end;
+	}
+
+	ret = 0;
+
+end:
+	gmssl_secure_clear(key, sizeof(key));
+	gmssl_secure_clear(iv, sizeof(iv));
+	if (infile && infp) fclose(infp);
+	if (outfile && outfp) fclose(outfp);
+	gmssl_secure_clear(&ctx, sizeof(ctx));
+	gmssl_secure_clear(inbuf, sizeof(inbuf));
+	gmssl_secure_clear(outbuf, sizeof(outbuf));
+	return ret;
+}