Update XMSS

tools/xmssmtsign.c

@@ -0,0 +1,199 @@
+/*
+ *  Copyright 2014-2026 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/mem.h>
+#include <gmssl/error.h>
+#include <gmssl/xmss.h>
+
+static const char *usage = "-key file [-in file] [-out file] [-verbose]\n";
+
+static const char *options =
+"Options\n"
+"    -key file                   Input private key file\n"
+"    -in file                    Input data file (if not using stdin)\n"
+"    -out file                   Output signature file\n"
+"    -verbose                    Print public key and signature\n"
+"\n";
+
+int xmssmtsign_main(int argc, char **argv)
+{
+	int ret = 1;
+	char *prog = argv[0];
+	char *keyfile = NULL;
+	char *infile = NULL;
+	char *outfile = NULL;
+	int verbose = 0;
+	FILE *keyfp = NULL;
+	FILE *infp = stdin;
+	FILE *outfp = stdout;
+	uint8_t pubkey[XMSSMT_PUBLIC_KEY_SIZE];
+	uint8_t *keybuf = NULL;
+	size_t keylen;
+	const uint8_t *cp;
+	uint8_t *p;
+	XMSSMT_KEY key;
+	XMSSMT_SIGN_CTX ctx;
+	uint8_t sig[XMSSMT_SIGNATURE_MAX_SIZE];
+	size_t siglen;
+
+	memset(&key, 0, sizeof(key));
+
+	argc--;
+	argv++;
+
+	if (argc < 1) {
+		fprintf(stderr, "usage: gmssl %s %s\n", prog, usage);
+		return 1;
+	}
+
+	while (argc > 0) {
+		if (!strcmp(*argv, "-help")) {
+			printf("usage: %s %s\n", prog, usage);
+			printf("%s\n", options);
+			ret = 0;
+			goto end;
+		} else if (!strcmp(*argv, "-key")) {
+			if (--argc < 1) goto bad;
+			keyfile = *(++argv);
+			if (!(keyfp = fopen(keyfile, "rb+"))) {
+				fprintf(stderr, "%s: open '%s' failure: %s\n", prog, keyfile, strerror(errno));
+				goto end;
+			}
+		} 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 if (!strcmp(*argv, "-verbose")) {
+			verbose = 1;
+		} 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 (fread(pubkey, 1, sizeof(pubkey), keyfp) != sizeof(pubkey)) {
+		error_print();
+		goto end;
+	}
+	cp = pubkey;
+	keylen = sizeof(pubkey);
+	if (xmssmt_public_key_from_bytes(&key, &cp, &keylen) != 1 ) {
+		error_print();
+		goto end;
+	}
+
+
+	if (xmssmt_private_key_size(key.public_key.xmssmt_type, &keylen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (!(keybuf = malloc(keylen))) {
+		error_print();
+		goto end;
+	}
+	memcpy(keybuf, pubkey, sizeof(pubkey));
+
+
+	if (fread(keybuf + sizeof(pubkey), 1, keylen - sizeof(pubkey), keyfp) != keylen - sizeof(pubkey)) {
+		fprintf(stderr, "%s: read private key failure\n", prog);
+		goto end;
+	}
+	cp = keybuf;
+	if (xmssmt_private_key_from_bytes(&key, &cp, &keylen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (keylen) {
+		error_print();
+		return -1;
+	}
+
+	if (verbose) {
+		xmssmt_public_key_print(stderr, 0, 0, "lms_public_key", &key);
+	}
+
+	if (xmssmt_sign_init(&ctx, &key) != 1) {
+		error_print();
+		goto end;
+	}
+
+	// write updated key back to file
+	// TODO: write back `q` only
+	p = keybuf;
+	keylen = 0;
+	if (xmssmt_private_key_to_bytes(&key, &p, &keylen) != 1) {
+		error_print();
+		return -1;
+	}
+	rewind(keyfp);
+	if (fwrite(keybuf, 1, keylen, keyfp) != keylen) {
+		error_print();
+		return -1;
+	}
+
+	while (1) {
+		uint8_t buf[1024];
+		size_t len = fread(buf, 1, sizeof(buf), infp);
+		if (len == 0) {
+			break;
+		}
+		if (xmssmt_sign_update(&ctx, buf, len) != 1) {
+			error_print();
+			goto end;
+		}
+	}
+	if (xmssmt_sign_finish(&ctx, sig, &siglen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(sig, 1, siglen, outfp) != siglen) {
+		error_print();
+		goto end;
+	}
+	if (verbose) {
+		xmssmt_signature_print(stderr, 0, 0, "xmssmt_signature", sig, siglen, key.public_key.xmssmt_type);
+	}
+
+	ret = 0;
+
+end:
+	//xmss_key_cleanup(&key);
+	gmssl_secure_clear(keybuf, keylen);
+	gmssl_secure_clear(&ctx, sizeof(ctx));
+	if (keyfp) fclose(keyfp);
+	if (infp && infp != stdin) fclose(infp);
+	if (outfp && outfp != stdout) fclose(outfp);
+	return ret;
+}