Update Kyber

tools/kyberencap.c

@@ -0,0 +1,165 @@
+/*
+ *  Copyright 2014-2025 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/kyber.h>
+
+
+static const char *usage = "-pubkey file [-out file] -outkey file [-verbose]\n";
+
+
+// decap 中的out一定是secret，而in 一定是ciphertext
+// encap 中的out 是decap的in，因此encap中的out是ciphertext，而输出的secret是特殊的
+
+static const char *options =
+"Options\n"
+"    -pubkey file                Input public key file\n"
+"    -out file                   Output ciphertext (decapsulated secret)\n"
+"    -outkey file                Output secret\n"
+"    -verbose                    Print public key and ciphertext\n"
+"\n";
+
+int kyberencap_main(int argc, char **argv)
+{
+	int ret = 1;
+	char *prog = argv[0];
+	char *pubkeyfile = NULL;
+	char *outfile = NULL;
+	char *outkeyfile = NULL;
+	int verbose = 0;
+	FILE *pubkeyfp = NULL;
+	FILE *outfp = stdout;
+	FILE *outkeyfp = NULL;
+	uint8_t pubkeybuf[KYBER_PUBLIC_KEY_SIZE];
+	size_t pubkeylen = KYBER_PUBLIC_KEY_SIZE;
+	const uint8_t *cp = pubkeybuf;
+	uint8_t outbuf[sizeof(KYBER_CIPHERTEXT)];
+	size_t outlen;
+	KYBER_PRIVATE_KEY key;
+	KYBER_CIPHERTEXT ciphertext;
+
+	uint8_t outkey[32];
+
+
+	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, "-pubkey")) {
+			if (--argc < 1) goto bad;
+			pubkeyfile = *(++argv);
+			if (!(pubkeyfp = fopen(pubkeyfile, "rb"))) {
+				fprintf(stderr, "%s: open '%s' failure: %s\n", prog, pubkeyfile, 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, "-outkey")) {
+			if (--argc < 1) goto bad;
+			outkeyfile = *(++argv);
+			if (!(outkeyfp = fopen(outkeyfile, "wb"))) {
+				fprintf(stderr, "%s: open '%s' failure: %s\n", prog, outkeyfile, 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 (!pubkeyfile) {
+		fprintf(stderr, "%s: `-key` option required\n", prog);
+		goto end;
+	}
+	if (!outkeyfile) {
+		fprintf(stderr, "%s: `-outkey` option required\n", prog);
+		goto end;
+	}
+
+	if (fread(pubkeybuf, 1, pubkeylen, pubkeyfp) != pubkeylen) {
+		fprintf(stderr, "%s: read public key failure\n", prog);
+		goto end;
+	}
+	if (kyber_public_key_from_bytes(&key, &cp, &pubkeylen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (verbose) {
+		kyber_public_key_print(stderr, 0, 0, "kyber_public_key", &key);
+	}
+
+
+	if (kyber_encap(&key.pk, &ciphertext, outkey) != 1) {
+		error_print();
+		return -1;
+	}
+
+	if (verbose) {
+
+		kyber_ciphertext_print(stderr, 0, 0, "kyber_ciphertext", &ciphertext);
+
+
+		format_bytes(stderr, 0, 0, "key", outkey, 32);
+
+	}
+
+
+	uint8_t *p = outbuf;
+	outlen = 0;
+	if (kyber_ciphertext_to_bytes(&ciphertext, &p, &outlen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
+		error_print();
+		goto end;
+	}
+
+	if (fwrite(outkey, 1, 32, outkeyfp) != 32) {
+		error_print();
+		goto end;
+	}
+
+	ret = 0;
+
+end:
+	if (pubkeyfp) fclose(pubkeyfp);
+	if (outfp && outfp != stdin) fclose(outfp);
+	if (outkeyfp) fclose(outkeyfp);
+	return ret;
+}