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Update XMSS

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This commit is contained in:
Zhi Guan
2026-01-05 21:19:23 +08:00
parent e919690d6a
commit 38451da6a8
6 changed files with 206 additions and 74 deletions
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23
include/gmssl/xmss.h
View File

@@ -149,19 +149,9 @@ int wots_verify(const hash256_t wots_root,
// from RFC 8391 table 7
enum {
XMSS_RESERVED = 0x00000000,
XMSS_SHA2_10_256 = 0x00000001,
XMSS_SHA2_16_256 = 0x00000002,
XMSS_SHA2_20_256 = 0x00000003,
XMSS_SHA2_10_512 = 0x00000004,
XMSS_SHA2_16_512 = 0x00000005,
XMSS_SHA2_20_512 = 0x00000006,
XMSS_SHAKE_10_256 = 0x00000007,
XMSS_SHAKE_16_256 = 0x00000008,
XMSS_SHAKE_20_256 = 0x00000009,
XMSS_SHAKE_10_512 = 0x0000000A,
XMSS_SHAKE_16_512 = 0x0000000B,
XMSS_SHAKE_20_512 = 0x0000000C,
};
enum {
@@ -216,23 +206,28 @@ typedef struct {
typedef struct {
XMSS_PUBLIC_KEY public_key;
uint32_t index;
hash256_t secret;
hash256_t sk_prf;
uint32_t index;
hash256_t *tree; // hash256_t[2^(h + 1) - 1]
} XMSS_KEY;
#define XMSS_PRIVATE_KEY_SIZE (XMSS_PUBLIC_KEY_SIZE + 32 + 32 + 4) // = 136
// XMSS_SHA2_10_256: 65,640
// XMSS_SHA2_16_256: 4,194,408
// XMSS_SHA2_20_256: 67,108,968
int xmss_private_key_size(uint32_t xmss_type, size_t *keysize);
//#define XMSS_PRIVATE_KEY_SIZE (XMSS_PUBLIC_KEY_SIZE + 32 + 32 + 4) // = 136
int xmss_key_generate(XMSS_KEY *key, uint32_t xmss_type);
int xmss_key_remaining_signs(const XMSS_KEY *key, size_t *count);
void xmss_key_cleanup(XMSS_KEY *key);
int xmss_public_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen);
int xmss_public_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen);
int xmss_public_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSS_KEY *key);
int xmss_private_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen);
int xmss_private_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen);
int xmss_private_key_print(FILE *fp, int fmt, int ind, const char *label, const XMSS_KEY *key);
void xmss_key_cleanup(XMSS_KEY *key);
typedef struct {
@@ -348,9 +343,9 @@ typedef struct {
typedef struct {
XMSSMT_PUBLIC_KEY public_key;
uint64_t index; // in [0, 2^60 - 1]
hash256_t secret;
hash256_t sk_prf;
uint64_t index; // in [0, 2^60 - 1]
hash256_t *trees;
wots_sig_t wots_sigs[XMSSMT_MAX_LAYERS - 1];
} XMSSMT_KEY;

79
src/xmss.c
View File

@@ -672,6 +672,26 @@ uint32_t xmss_type_from_name(const char *name)
return 0;
}
int xmss_private_key_size(uint32_t xmss_type, size_t *keysize)
{
size_t height;
if (!keysize) {
error_print();
return -1;
}
if (xmss_type_to_height(xmss_type, &height) != 1) {
error_print();
return -1;
}
*keysize = XMSS_PUBLIC_KEY_SIZE
+ sizeof(hash256_t)
+ sizeof(hash256_t)
+ sizeof(uint32_t)
+ sizeof(hash256_t) * xmss_num_tree_nodes(height);
return 1;
}
int xmss_key_generate_ex(XMSS_KEY *key, uint32_t xmss_type,
const hash256_t seed, const hash256_t secret, const hash256_t sk_prf)
{
@@ -838,6 +858,9 @@ int xmss_public_key_print(FILE *fp, int fmt, int ind, const char *label, const X
int xmss_private_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen)
{
size_t height;
size_t tree_size;
if (!key || !outlen) {
error_print();
return -1;
@@ -849,32 +872,55 @@ int xmss_private_key_to_bytes(const XMSS_KEY *key, uint8_t **out, size_t *outlen
uint32_to_bytes(key->index, out, outlen);
hash256_to_bytes(key->secret, out, outlen);
hash256_to_bytes(key->sk_prf, out, outlen);
if (key->tree == NULL) {
error_print();
return -1;
}
if (xmss_type_to_height(key->public_key.xmss_type, &height) != 1) {
error_print();
return -1;
}
tree_size = sizeof(hash256_t) * xmss_num_tree_nodes(height);
if (out && *out) {
memcpy(*out, key->tree, tree_size);
*out += tree_size;
}
*outlen += tree_size;
return 1;
}
int xmss_private_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen)
{
size_t height;
size_t tree_nodes;
size_t tree_size;
xmss_adrs_t adrs;
if (!key || !in || !(*in) || !inlen) {
error_print();
return -1;
}
if (*inlen < XMSS_PRIVATE_KEY_SIZE) {
error_print();
return -1;
}
if (xmss_public_key_from_bytes(key, in, inlen) != 1) {
error_print();
return -1;
}
// check inlen without tree
if (*inlen < sizeof(uint32_t) + sizeof(hash256_t)*2) {
error_print();
return -1;
}
if (xmss_type_to_height(key->public_key.xmss_type, &height) != 1) {
error_print();
return -1;
}
tree_size = sizeof(hash256_t) * xmss_num_tree_nodes(height);
// prepare buffer (might failure ops) before load secrets
if (!(key->tree = malloc(tree_size))) {
error_print();
return -1;
}
// index, allow index == 2^h, which means out-of-keys
uint32_from_bytes(&key->index, in, inlen);
@@ -882,22 +928,25 @@ int xmss_private_key_from_bytes(XMSS_KEY *key, const uint8_t **in, size_t *inlen
error_print();
return -1;
}
// prepare buffer (might failure ops) before load secrets
tree_nodes = (1 << (height + 1)) - 1;
if (!(key->tree = malloc(sizeof(hash256_t) * tree_nodes))) {
hash256_from_bytes(key->secret, in, inlen);
hash256_from_bytes(key->sk_prf, in, inlen);
if (*inlen) {
// load tree
if (*inlen < tree_size) {
error_print();
return -1;
}
// secret
hash256_from_bytes(key->secret, in, inlen);
// sk_prf
hash256_from_bytes(key->sk_prf, in, inlen);
memcpy(key->tree, *in, tree_size);
*in += tree_size;
*inlen -= tree_size;
} else {
// build_tree
adrs_set_layer_address(adrs, 0);
adrs_set_tree_address(adrs, 0);
xmss_build_tree(key->secret, key->public_key.seed, adrs, height, key->tree);
}
// check
if (memcmp(key->tree[xmss_tree_root_offset(height)],
key->public_key.root, sizeof(hash256_t)) != 0) {

63
tests/xmsstest.c
View File

@@ -306,6 +306,36 @@ static int test_xmss_build_root(void)
return 1;
}
static int test_xmss_private_key_size(void)
{
struct {
uint32_t xmss_type;
size_t keylen;
} tests[] = {
{ XMSS_HASH256_10_256, 65640 },
{ XMSS_HASH256_16_256, 4194408 },
{ XMSS_HASH256_20_256, 67108968 },
};
size_t keylen;
size_t i;
format_print(stderr, 0, 4, "xmss_private_key_size\n");
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++) {
if (xmss_private_key_size(tests[i].xmss_type, &keylen) != 1) {
error_print();
return -1;
}
if (keylen != tests[i].keylen) {
error_print();
return -1;
}
format_print(stderr, 0, 8, "%s: %zu\n", xmss_type_name(tests[i].xmss_type), keylen);
}
printf("%s() ok\n", __FUNCTION__);
return 1;
}
static int test_xmss_key_generate(void)
{
uint32_t xmss_type = XMSS_HASH256_10_256;
@@ -342,12 +372,12 @@ static int test_xmss_key_generate(void)
return 1;
}
static int test_xmss_key_to_bytes(void)
static int test_xmss_public_key_to_bytes(void)
{
uint32_t xmss_type = XMSS_HASH256_10_256;
XMSS_KEY key;
XMSS_KEY pub;
uint8_t buf[XMSS_PUBLIC_KEY_SIZE + XMSS_PRIVATE_KEY_SIZE];
uint8_t buf[XMSS_PUBLIC_KEY_SIZE];
uint8_t *p = buf;
const uint8_t *cp = buf;
size_t len = 0;
@@ -365,16 +395,6 @@ static int test_xmss_key_to_bytes(void)
error_print();
return -1;
}
if (xmss_private_key_to_bytes(&key, &p, &len) != 1) {
error_print();
return -1;
}
if (len != XMSS_PUBLIC_KEY_SIZE + XMSS_PRIVATE_KEY_SIZE) {
error_print();
return -1;
}
if (xmss_public_key_from_bytes(&pub, &cp, &len) != 1) {
error_print();
return -1;
@@ -383,18 +403,6 @@ static int test_xmss_key_to_bytes(void)
error_print();
return -1;
}
if (xmss_private_key_from_bytes(&pub, &cp, &len) != 1) {
error_print();
return -1;
}
// FIXME: compare trees
/*
if (memcmp(&key, &pub, sizeof(XMSS_KEY)) != 0) {
error_print();
return -1;
}
*/
if (len) {
error_print();
return -1;
@@ -1100,13 +1108,13 @@ int main(void)
if (test_xmss_adrs() != 1) goto err;
if (test_xmss_build_tree() != 1) goto err;
if (test_xmss_build_root() != 1) goto err;
if (test_xmss_key_generate() != 1) goto err;
if (test_xmss_key_to_bytes() != 1) goto err;
if (test_xmss_public_key_to_bytes() != 1) goto err;
if (test_xmss_private_key_size() != 1) goto err;
//if (test_xmss_private_key_to_bytes() != 1) goto err;
if (test_xmss_signature_size() != 1) goto err;
if (test_xmss_sign() != 1) goto err;
if (test_xmss_sign_init() != 1) goto err;
if (test_xmssmt_key_generate() != 1) goto err;
if (test_xmssmt_index_to_bytes() != 1) goto err;
if (test_xmssmt_signature_to_bytes() != 1) goto err;
@@ -1117,7 +1125,6 @@ int main(void)
if (test_xmssmt_private_key_to_bytes() != 1) goto err;
if (test_xmssmt_sign() != 1) goto err;
if (test_xmssmt_sign_update() != 1) goto err;
printf("%s all tests passed\n", __FILE__);
return 0;
err:

31
tools/xmsskeygen.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2014-2025 The GmSSL Project. All Rights Reserved.
* 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.
@@ -42,11 +42,12 @@ int xmsskeygen_main(int argc, char **argv)
FILE *outfp = NULL;
FILE *puboutfp = stdout;
XMSS_KEY key;
uint8_t out[XMSS_PRIVATE_KEY_SIZE];
uint8_t *out = NULL;
uint8_t *pout;
size_t outlen;
uint8_t pubout[XMSS_PUBLIC_KEY_SIZE];
uint8_t *pout = out;
uint8_t *ppubout = pubout;
size_t outlen = 0, puboutlen = 0;
uint8_t *ppubout;
size_t puboutlen ;
memset(&key, 0, sizeof(key));
@@ -116,6 +117,17 @@ bad:
xmss_public_key_print(stderr, 0, 0, "xmss_public_key", &key);
}
outlen = 0;
if (xmss_private_key_to_bytes(&key, NULL, &outlen) != 1) {
error_print();
goto end;
}
if (!(out = malloc(outlen))) {
error_print();
goto end;
}
pout = out;
outlen = 0;
if (xmss_private_key_to_bytes(&key, &pout, &outlen) != 1) {
error_print();
goto end;
@@ -125,10 +137,16 @@ bad:
goto end;
}
ppubout = pubout;
puboutlen = 0;
if (xmss_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;
@@ -137,7 +155,10 @@ bad:
ret = 0;
end:
xmss_key_cleanup(&key);
if (out) {
gmssl_secure_clear(out, outlen);
free(out);
}
if (outfile && outfp) fclose(outfp);
if (puboutfile && puboutfp) fclose(puboutfp);
return ret;

14
tools/xmssmtsign.c
View File

@@ -149,6 +149,7 @@ bad:
goto end;
}
#if 0
// write updated key back to file
// TODO: write back `q` only
p = keybuf;
@@ -162,6 +163,17 @@ bad:
error_print();
return -1;
}
#else
if (fseek(keyfp, XMSSMT_PUBLIC_KEY_SIZE, SEEK_SET) != 0) {
error_print();
goto end;
}
uint8_t index_buf[8];
uint8_t *pindex = index_buf;
size_t index_len = 0;
xmssmt_index_to_bytes(key.index, key.public_key.xmssmt_type, &pindex, &index_len);
fwrite(index_buf, 1, index_len, keyfp);
#endif
while (1) {
uint8_t buf[1024];
@@ -189,7 +201,7 @@ bad:
ret = 0;
end:
//xmss_key_cleanup(&key);
xmssmt_key_cleanup(&key);
gmssl_secure_clear(keybuf, keylen);
gmssl_secure_clear(&ctx, sizeof(ctx));
if (keyfp) fclose(keyfp);

60
tools/xmsssign.c
View File

@@ -14,6 +14,7 @@
#include <stdlib.h>
#include <gmssl/mem.h>
#include <gmssl/error.h>
#include <gmssl/endian.h>
#include <gmssl/xmss.h>
static const char *usage = "-key file [-in file] [-out file] [-verbose]\n";
@@ -37,10 +38,12 @@ int xmsssign_main(int argc, char **argv)
FILE *keyfp = NULL;
FILE *infp = stdin;
FILE *outfp = stdout;
uint8_t keybuf[XMSS_PRIVATE_KEY_SIZE];
size_t keylen = XMSS_PRIVATE_KEY_SIZE;
const uint8_t *cp = keybuf;
uint8_t *p = keybuf;
uint8_t pubkeybuf[XMSS_PUBLIC_KEY_SIZE];
uint8_t *keybuf = NULL;
size_t keylen;
const uint8_t *cp;
uint8_t *p;
size_t len;
XMSS_KEY key;
XMSS_SIGN_CTX ctx;
uint8_t sig[XMSS_SIGNATURE_MAX_SIZE];
@@ -102,10 +105,40 @@ bad:
goto end;
}
if (fread(keybuf, 1, keylen, keyfp) != keylen) {
// load xmss_public_key
if (fread(pubkeybuf, 1, sizeof(pubkeybuf), keyfp) != sizeof(pubkeybuf)) {
error_print();
goto end;
}
cp = pubkeybuf;
len = sizeof(pubkeybuf);
if (xmss_public_key_from_bytes(&key, &cp, &len) != 1) {
error_print();
goto end;
}
if (len) {
error_print();
goto end;
}
// xmss_private_key_size
if (xmss_private_key_size(key.public_key.xmss_type, &keylen) != 1) {
error_print();
goto end;
}
if (!(keybuf = malloc(keylen))) {
error_print();
goto end;
}
memcpy(keybuf, pubkeybuf, sizeof(pubkeybuf));
len = keylen - sizeof(pubkeybuf);
if (fread(keybuf + sizeof(pubkeybuf), 1, len, keyfp) != len) {
fprintf(stderr, "%s: read private key failure\n", prog);
goto end;
}
cp = keybuf;
if (xmss_private_key_from_bytes(&key, &cp, &keylen) != 1) {
error_print();
goto end;
@@ -124,8 +157,10 @@ bad:
goto end;
}
#if 0
// write updated key back to file
// TODO: write back `q` only
p = keybuf;
if (xmss_private_key_to_bytes(&key, &p, &keylen) != 1) {
error_print();
return -1;
@@ -135,6 +170,16 @@ bad:
error_print();
return -1;
}
#else
// write index only
if (fseek(keyfp, XMSS_PUBLIC_KEY_SIZE, SEEK_SET) != 0) {
error_print();
goto end;
}
uint8_t index_buf[4];
PUTU32(index_buf, key.index);
fwrite(index_buf, 1, 4, keyfp);
#endif
while (1) {
uint8_t buf[1024];
@@ -163,8 +208,11 @@ bad:
end:
xmss_key_cleanup(&key);
gmssl_secure_clear(keybuf, sizeof(keybuf));
gmssl_secure_clear(&ctx, sizeof(ctx));
if (keybuf) {
gmssl_secure_clear(keybuf, keylen);
free(keybuf);
}
if (keyfp) fclose(keyfp);
if (infp && infp != stdin) fclose(infp);
if (outfp && outfp != stdout) fclose(outfp);