Add SPHINCS+ commands to gmssl

Add `sphincskeygen`, `sphincssign`, `sphincsverify`

tools/sphincskeygen.c

@@ -0,0 +1,132 @@
+/*
+ *  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/sphincs.h>
+
+
+static const char *usage = "-out file [-pubout file] [-verbose]\n";
+
+static const char *options =
+"Options\n"
+"    -out file                   Output private key\n"
+"    -pubout file                Output public key\n"
+"    -verbose                    Print public key\n"
+"\n";
+
+int sphincskeygen_main(int argc, char **argv)
+{
+	int ret = 1;
+	char *prog = argv[0];
+	char *outfile = NULL;
+	char *puboutfile = NULL;
+	int verbose = 0;
+	FILE *outfp = NULL;
+	FILE *puboutfp = stdout;
+	SPHINCS_KEY key;
+	uint8_t out[SPHINCS_PRIVATE_KEY_SIZE];
+	uint8_t *pout = out;
+	size_t outlen = 0;
+	uint8_t pubout[SPHINCS_PUBLIC_KEY_SIZE];
+	uint8_t *ppubout = pubout;
+	size_t puboutlen = 0;
+
+	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: gmssl %s %s\n", prog, usage);
+			printf("%s\n", options);
+			ret = 0;
+			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, "-pubout")) {
+			if (--argc < 1) goto bad;
+			puboutfile = *(++argv);
+			if (!(puboutfp = fopen(puboutfile, "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 (!outfp) {
+		fprintf(stderr, "%s: `-out` option required\n", prog);
+		goto end;
+	}
+
+	if (sphincs_key_generate(&key) != 1) {
+		error_print();
+		return -1;
+	}
+	if (verbose) {
+		sphincs_public_key_print(stderr, 0, 0, "sphincs_public_key", &key);
+	}
+
+	if (sphincs_private_key_to_bytes(&key, &pout, &outlen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(out, 1, outlen, outfp) != outlen) {
+		error_print();
+		goto end;
+	}
+
+	if (sphincs_public_key_to_bytes(&key, &ppubout, &puboutlen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (puboutlen != sizeof(pubout)) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(pubout, 1, puboutlen, puboutfp) != puboutlen) {
+		error_print();
+		goto end;
+	}
+
+	ret = 0;
+end:
+	sphincs_key_cleanup(&key);
+	gmssl_secure_clear(out, sizeof(out));
+	if (outfile && outfp) fclose(outfp);
+	if (puboutfile && puboutfp) fclose(puboutfp);
+	return ret;
+}