diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e8c1d4e..ba65f004 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,7 +56,7 @@ option(ENABLE_SM2_EXTS "Enable SM2 Extensions" OFF)
 
 option(ENABLE_LMS_HSS "Enable LMS/HSS signature" ON)
 option(ENABLE_XMSS "Enable XMSS/XMSS^MT signature" ON)
-option(ENABLE_SPHINCS "Enable SPHINCS+ signature" OFF)
+option(ENABLE_SPHINCS "Enable SPHINCS+ signature" ON)
 option(ENABLE_KYBER "Enable Kyber" OFF)
 
 option(ENABLE_SHA1 "Enable SHA1" ON)
@@ -454,7 +454,7 @@ if (ENABLE_SPHINCS)
 	message(STATUS "ENABLE_SPHINCS is ON")
 	add_definitions(-DENABLE_SPHINCS)
 	list(APPEND src src/sphincs.c)
-	#list(APPEND tools tools/sphincskeygen.c tools/sphincssign.c tools/sphincsverify.c)
+	list(APPEND tools tools/sphincskeygen.c tools/sphincssign.c tools/sphincsverify.c)
 	list(APPEND tests sphincs)
 
 	option(ENABLE_SPHINCS_CROSSCHECK "Enable SPHINCS SHA-256 cross-check" ON)
@@ -486,6 +486,7 @@ if (ENABLE_SHA2)
 	message(STATUS "ENABLE_SHA2 is ON")
 	add_definitions(-DENABLE_SHA2)
 	list(APPEND src src/sha256.c src/sha512.c)
+	list(APPEND src src/sha256_hmac.c)
 	list(APPEND tests sha224 sha256 sha384 sha512)
 endif()
 
diff --git a/include/gmssl/sphincs.h b/include/gmssl/sphincs.h
index 8a0ddc16..b221c36e 100644
--- a/include/gmssl/sphincs.h
+++ b/include/gmssl/sphincs.h
@@ -32,12 +32,20 @@ extern "C" {
 # define hash256_update		sha256_update
 # define hash256_finish		sha256_finish
 # define HASH256_BLOCK_SIZE	SHA256_BLOCK_SIZE
+# define HASH256_HMAC_CTX	SHA256_HMAC_CTX
+# define hash256_hmac_init	sha256_hmac_init
+# define hash256_hmac_update	sha256_hmac_update
+# define hash256_hmac_finish	sha256_hmac_finish
 #else
 # define HASH256_CTX		SM3_CTX
 # define hash256_init		sm3_init
 # define hash256_update		sm3_update
 # define hash256_finish		sm3_finish
 # define HASH256_BLOCK_SIZE	SM3_BLOCK_SIZE
+# define HASH256_HMAC_CTX	SM3_HMAC_CTX
+# define hash256_hmac_init	sm3_hmac_init
+# define hash256_hmac_update	sm3_hmac_update
+# define hash256_hmac_finish	sm3_hmac_finish
 #endif
 
 
@@ -256,7 +264,6 @@ void sphincs_wots_pk_to_root(const sphincs_wots_key_t pk,
 	total: 30 bytes, 1 MGF1-SM3 output
 
 
-
   SPHINCS+_128f/SM3
 
 	1. fors_index: 6 * 33 = 198 bits = 25 bytes
@@ -266,6 +273,14 @@ void sphincs_wots_pk_to_root(const sphincs_wots_key_t pk,
 
 */
 
+#define SPHINCS_TBS_SIZE 30 // sphincs+_128s
+
+#define SPHINCS_TBS_FORS_SIZE	21
+#define SPHINCS_TBS_TREE_ADDRESS_SIZE	7
+#define SPHINCS_TBS_KEYPAIR_ADDRESS_SIZE 2
+
+
+// #define SPHINCS_TBS_SIZE	34 // sphincs+_128f
 
 
 void sphincs_xmss_tree_hash(
@@ -285,9 +300,15 @@ void sphincs_xmss_build_root(const sphincs_hash128_t wots_root, uint32_t tree_in
 
 typedef struct {
 	sphincs_wots_sig_t wots_sig;
-	sphincs_hash128_t auth_path[22]; // sphincs+_128f height = 22
+	sphincs_hash128_t auth_path[SPHINCS_XMSS_HEIGHT];
 } SPHINCS_XMSS_SIGNATURE;
 
+int sphincs_xmss_signature_print_ex(FILE *fp, int fmt, int ind, const char *label, const SPHINCS_XMSS_SIGNATURE *sig);
+int sphincs_xmss_signature_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *sig, size_t siglen);
+int sphincs_xmss_signature_to_bytes(const SPHINCS_XMSS_SIGNATURE *sig, uint8_t **out, size_t *outlen);
+int sphincs_xmss_signature_from_bytes(SPHINCS_XMSS_SIGNATURE *sig, const uint8_t **in, size_t *inlen);
+
+
 void sphincs_xmss_sign(const sphincs_hash128_t secret,
 	const sphincs_hash128_t seed, const sphincs_adrs_t adrs, uint32_t keypair_address,
 	const sphincs_hash128_t tbs_root, // to be signed xmss_root or fors_forest_root
@@ -361,6 +382,8 @@ typedef struct {
 #define SPHINCS_PUBLIC_KEY_SIZE sizeof(SPHINCS_PUBLIC_KEY)
 #define SPHINCS_PRIVATE_KEY_SIZE sizeof(SPHINCS_KEY)
 
+int sphincs_key_generate(SPHINCS_KEY *key);
+
 int sphincs_public_key_to_bytes(const SPHINCS_KEY *key, uint8_t **out, size_t *outlen);
 int sphincs_public_key_from_bytes(SPHINCS_KEY *key, const uint8_t **in, size_t *inlen);
 int sphincs_public_key_print(FILE *fp, int fmt, int ind, const char *label, const SPHINCS_KEY *key);
@@ -370,12 +393,15 @@ int sphincs_private_key_print(FILE *fp, int fmt, int ind, const char *label, con
 void sphincs_key_cleanup(SPHINCS_KEY *key);
 
 
+
+
 typedef struct {
 	sphincs_hash128_t random;
 	SPHINCS_FORS_SIGNATURE fors_sig;
 	SPHINCS_XMSS_SIGNATURE xmss_sigs[SPHINCS_HYPERTREE_LAYERS];
 } SPHINCS_SIGNATURE;
 
+#define SPHINCS_SIGNATURE_SIZE sizeof(SPHINCS_SIGNATURE)
 int sphincs_signature_to_bytes(const SPHINCS_SIGNATURE *sig, uint8_t **out, size_t *outlen);
 int sphincs_signature_from_bytes(SPHINCS_SIGNATURE *sig, const uint8_t **in, size_t *inlen);
 int sphincs_signature_print_ex(FILE *fp, int fmt, int ind, const char *label, const SPHINCS_SIGNATURE *sig);
@@ -383,6 +409,41 @@ int sphincs_signature_print(FILE *fp, int fmt, int ind, const char *label, const
 
 
 
+
+typedef struct {
+	HASH256_HMAC_CTX hmac_ctx;
+	HASH256_CTX hash_ctx;
+	SPHINCS_SIGNATURE sig;
+	int state; // after init 0, after prepare 1, after update 2
+	size_t round1_msglen;
+	size_t round2_msglen;
+	SPHINCS_KEY key;
+} SPHINCS_SIGN_CTX;
+
+int sphincs_sign_init_ex(SPHINCS_SIGN_CTX *ctx, const SPHINCS_KEY *key, int randomize);
+int sphincs_sign_init(SPHINCS_SIGN_CTX *ctx, const SPHINCS_KEY *key);
+int sphincs_sign_prepare(SPHINCS_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
+int sphincs_sign_update(SPHINCS_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
+int sphincs_sign_finish_ex(SPHINCS_SIGN_CTX *ctx, SPHINCS_SIGNATURE *sig);
+int sphincs_sign_finish(SPHINCS_SIGN_CTX *ctx, uint8_t *sig, size_t *siglen);
+int sphincs_verify_init_ex(SPHINCS_SIGN_CTX *ctx, const SPHINCS_KEY *key, const SPHINCS_SIGNATURE *sig);
+int sphincs_verify_init(SPHINCS_SIGN_CTX *ctx, const SPHINCS_KEY *key, const uint8_t *sig, size_t siglen);
+int sphincs_verify_update(SPHINCS_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
+int sphincs_verify_finish(SPHINCS_SIGN_CTX *ctx);
+
+
+
+
+
+
+
+
+
+
+
+
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/tests/sphincstest.c b/tests/sphincstest.c
index 0d8f6d98..3366ff11 100644
--- a/tests/sphincstest.c
+++ b/tests/sphincstest.c
@@ -425,29 +425,212 @@ static int test_sphincs_fors_sign(void)
 	return 1;
 }
 
+
 static int test_sphincs_sign(void)
 {
-	SPHINCS_KEY key;
+	SPHINCS_KEY _key;
+	SPHINCS_KEY *key = &_key;
+	uint8_t msg[100] = {1, 2, 3, 0};
+	SPHINCS_SIGNATURE _sig;
+	SPHINCS_SIGNATURE *sig = &_sig;
+	HASH256_CTX hash_ctx;
+	HASH256_HMAC_CTX hmac_ctx;
+	hash256_t dgst;
+
+
+	sphincs_hash128_t opt_rand;
+
+
 	sphincs_adrs_t adrs = {0};
-	sphincs_hash128_t random;
+	sphincs_hash128_t fors_forest_root;
+
+	uint8_t tree_address_buf[8] = {0};
+	uint8_t keypair_address_buf[4] = {0};
+
+	uint64_t tree_address;
+	uint32_t keypair_address;
+
+	int randomize = 0;
+	uint32_t i;
+
+	uint8_t tbs[SPHINCS_TBS_SIZE];
+
+	if (sphincs_key_generate(key) != 1) {
+		error_print();
+		return -1;
+	}
 
 
-	uint32_t tree_index;
-	uint32_t leaf_index;
+	// set opt_rand
+	memcpy(opt_rand, key->public_key.seed, sizeof(sphincs_hash128_t));
+	if (randomize) {
+		if (rand_bytes(opt_rand, sizeof(opt_rand)) != 1) {
+			error_print();
+			return -1;
+		}
+	}
 
+	// 如果R是用M生成的，这意味着M要读取2遍，这就没办法用init/update范式了
+
+	// R = PRF_msg(sk_prf, optrand, M) = HMAC(sk_prf, opt_rand|M)
+	hash256_hmac_init(&hmac_ctx, key->sk_prf, sizeof(sphincs_hash128_t));
+	hash256_hmac_update(&hmac_ctx, opt_rand, sizeof(sphincs_hash128_t));
+	hash256_hmac_update(&hmac_ctx, msg, sizeof(msg));
+	hash256_hmac_finish(&hmac_ctx, dgst);
+	memcpy(sig->random, dgst, sizeof(sphincs_hash128_t));
+
+	// dgst = HASH256(R|seed|root|M)
+	hash256_init(&hash_ctx);
+	hash256_update(&hash_ctx, sig->random, sizeof(sphincs_hash128_t));
+	hash256_update(&hash_ctx, key->public_key.seed, sizeof(sphincs_hash128_t));
+	hash256_update(&hash_ctx, key->public_key.root, sizeof(sphincs_hash128_t));
+	hash256_update(&hash_ctx, msg, sizeof(msg));
+	hash256_finish(&hash_ctx, dgst);
+
+	// tbs = H_msg(R, seed, root, M) = MGF1(R|seed|dgst, tbs_len)
+	for (i = 0; i < (SPHINCS_TBS_SIZE + 31)/32; i++) {
+		uint8_t count[4];
+		PUTU32(count, i);
+		hash256_init(&hash_ctx);
+		hash256_update(&hash_ctx, sig->random, sizeof(sphincs_hash128_t));
+		hash256_update(&hash_ctx, key->public_key.seed, sizeof(sphincs_hash128_t));
+		hash256_update(&hash_ctx, dgst, sizeof(dgst));
+		hash256_update(&hash_ctx, count, sizeof(count));
+		hash256_finish(&hash_ctx, tbs + sizeof(dgst) * i);
+	}
+
+
+	// get tree_address from tbs
+	memcpy(tree_address_buf + 8 - 7, tbs + 21, 7);
+	tree_address = GETU64(tree_address_buf); // 54 bits
+	tree_address >>= 10;
+
+	// get keypair_address from tbs
+	memcpy(keypair_address_buf + 4 - 2, tbs + 21 + 7, 2);
+	keypair_address = GETU32(keypair_address_buf);
+	keypair_address >>= (16 - 9);
+
+
+
+	format_bytes(stderr, 0, 4, "tree_address", tree_address_buf, 8);
+	format_bytes(stderr, 0, 4, "keypair_address", keypair_address_buf, 4);
+
+
+	fprintf(stderr, "tree_address %zu\n", (size_t)tree_address);
+	fprintf(stderr, "keypair_address %zu\n", (size_t)keypair_address);
+
+
+
+
+
+
+	// fors_sign
 	sphincs_adrs_set_layer_address(adrs, 0);
-	sphincs_adrs_set_tree_address(adrs, tree_index);
+	sphincs_adrs_set_tree_address(adrs, tree_address);
 	sphincs_adrs_set_type(adrs, SPHINCS_ADRS_TYPE_FORS_TREE);
-	sphincs_adrs_set_keypair_address(adrs, leaf_index);
+	sphincs_adrs_set_keypair_address(adrs, keypair_address);
+	sphincs_fors_sign(key->secret, key->public_key.seed, adrs, tbs, &sig->fors_sig);
+
+	// fors_sig => fors_forest_root
+	sphincs_fors_sig_to_root(&sig->fors_sig, key->public_key.seed, adrs, tbs, fors_forest_root);
+
+
+	error_print();
+
+
+
+	// hypertree_sign fors_forest_root
+	sphincs_adrs_set_type(adrs, SPHINCS_ADRS_TYPE_TREE);
+	sphincs_hypertree_sign(key->secret, key->public_key.seed, tree_address, keypair_address,
+		fors_forest_root, sig->xmss_sigs);
+
+
+	error_print();
+
+
+
+	// sphincs_verify
+	// --------------
+
+
+	// fors_sig => fors_forest_root
+	sphincs_adrs_set_layer_address(adrs, 0);
+	sphincs_adrs_set_tree_address(adrs, tree_address);
+	sphincs_adrs_set_type(adrs, SPHINCS_ADRS_TYPE_FORS_TREE);
+	sphincs_adrs_set_keypair_address(adrs, keypair_address);
+
+	sphincs_fors_sig_to_root(&sig->fors_sig, key->public_key.seed, adrs, tbs, fors_forest_root);
+
+	// hypertree_verify
+	sphincs_adrs_set_type(adrs, SPHINCS_ADRS_TYPE_TREE);
+
+	if (sphincs_hypertree_verify(key->public_key.root, key->public_key.seed,
+		tree_address, keypair_address, fors_forest_root, sig->xmss_sigs) != 1) {
+		error_print();
+		return -1;
+	}
 
 
 	printf("%s() ok\n", __FUNCTION__);
 	return 1;
 }
 
+
+static int test_sphincs_sign_update(void)
+{
+	SPHINCS_KEY key;
+	SPHINCS_SIGN_CTX ctx;
+	SPHINCS_SIGNATURE sig;
+	uint8_t msg[100] = { 1,2,3 };
+
+	if (sphincs_key_generate(&key) != 1) {
+		error_print();
+		return -1;
+	}
+
+	if (sphincs_sign_init(&ctx, &key) != 1) {
+		error_print();
+		return -1;
+	}
+	if (sphincs_sign_prepare(&ctx, msg, sizeof(msg)) != 1) {
+		error_print();
+		return -1;
+	}
+	if (sphincs_sign_update(&ctx, msg, sizeof(msg)) != 1) {
+		error_print();
+		return -1;
+	}
+	if (sphincs_sign_finish_ex(&ctx, &sig) != 1) {
+		error_print();
+		return -1;
+	}
+
+	// verify
+
+	if (sphincs_verify_init_ex(&ctx, &key, &sig) != 1) {
+		error_print();
+		return -1;
+	}
+	if (sphincs_verify_update(&ctx, msg, sizeof(msg)) != 1) {
+		error_print();
+		return -1;
+	}
+	if (sphincs_verify_finish(&ctx) != 1) {
+		error_print();
+		return -1;
+	}
+
+
+	printf("%s() ok\n", __FUNCTION__);
+	return 1;
+}
+
+
 int main(void)
 {
-	if (test_sphincs_fors_sign() != 1) goto err;
+	if (test_sphincs_sign_update() != 1) goto err;
+//	if (test_sphincs_sign() != 1) goto err;
+//	if (test_sphincs_fors_sign() != 1) goto err;
 	//if (test_sphincs_xmss_build_tree() != 1) goto err;
 	//if (test_sphincs_hypertree() != 1) goto err;
 //	if (test_sphincs_hypertree_sign() != 1) goto err;
diff --git a/tools/gmssl.c b/tools/gmssl.c
index eeb65eac..460a0fee 100644
--- a/tools/gmssl.c
+++ b/tools/gmssl.c
@@ -80,6 +80,11 @@ extern int xmssmtkeygen_main(int argc, char **argv);
 extern int xmssmtsign_main(int argc, char **argv);
 extern int xmssmtverify_main(int argc, char **argv);
 #endif
+#ifdef ENABLE_SPHINCS
+extern int sphincskeygen_main(int argc, char **argv);
+extern int sphincssign_main(int argc, char **argv);
+extern int sphincsverify_main(int argc, char **argv);
+#endif
 #ifdef ENABLE_KYBER
 extern int kyberkeygen_main(int argc, char **argv);
 extern int kyberencap_main(int argc, char **argv);
@@ -165,6 +170,11 @@ static const char *options =
 	"  xmssmtsign        Generate XMSS^MT-SM3 signature\n"
 	"  xmssmtverify      Verify XMSS^MT-SM3 signature\n"
 #endif
+#ifdef ENABLE_SPHINCS
+	"  sphincskeygen     Generate SPHINCS+_128s-SM3 keypair\n"
+	"  sphincssign       Generate SPHINCS+_128s-SM3 signature\n"
+	"  sphincsverify     Verify SPHINCS+_128s-SM3 signature\n"
+#endif
 #ifdef ENABLE_KYBER
 	"  kyberkeygen       Generate Kyber keypair\n"
 	"  kyberencap        Kyber KEM encap\n"
@@ -352,6 +362,14 @@ int main(int argc, char **argv)
 		} else if (!strcmp(*argv, "xmssmtverify")) {
 			return xmssmtverify_main(argc, argv);
 #endif
+#ifdef ENABLE_SPHINCS
+		} else if (!strcmp(*argv, "sphincskeygen")) {
+			return sphincskeygen_main(argc, argv);
+		} else if (!strcmp(*argv, "sphincssign")) {
+			return sphincssign_main(argc, argv);
+		} else if (!strcmp(*argv, "sphincsverify")) {
+			return sphincsverify_main(argc, argv);
+#endif
 #ifdef ENABLE_KYBER
 		} else if (!strcmp(*argv, "kyberkeygen")) {
 			return kyberkeygen_main(argc, argv);
diff --git a/tools/sphincskeygen.c b/tools/sphincskeygen.c
new file mode 100644
index 00000000..caf9d3cb
--- /dev/null
+++ b/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;
+}
diff --git a/tools/sphincssign.c b/tools/sphincssign.c
new file mode 100644
index 00000000..89115936
--- /dev/null
+++ b/tools/sphincssign.c
@@ -0,0 +1,175 @@
+/*
+ *  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/endian.h>
+#include <gmssl/sphincs.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 sphincssign_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 keybuf[SPHINCS_PRIVATE_KEY_SIZE];
+	const uint8_t *cp = keybuf;
+	size_t keylen = sizeof(keybuf);
+	SPHINCS_KEY key;
+	SPHINCS_SIGN_CTX ctx;
+	uint8_t sig[SPHINCS_SIGNATURE_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(keybuf, 1, keylen, keyfp) != keylen) {
+		fprintf(stderr, "%s: read private key failure\n", prog);
+		goto end;
+	}
+
+	if (sphincs_private_key_from_bytes(&key, &cp, &keylen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (keylen) {
+		error_print();
+		return -1;
+	}
+
+	if (verbose) {
+		sphincs_public_key_print(stderr, 0, 0, "sphincs_public_key", &key);
+	}
+
+	if (sphincs_sign_init(&ctx, &key) != 1) {
+		error_print();
+		goto end;
+	}
+
+	while (1) {
+		uint8_t buf[1024];
+		size_t len = fread(buf, 1, sizeof(buf), infp);
+		if (len == 0) {
+			break;
+		}
+		if (sphincs_sign_prepare(&ctx, buf, len) != 1) {
+			error_print();
+			goto end;
+		}
+	}
+
+	rewind(infp);
+	while (1) {
+		uint8_t buf[1024];
+		size_t len = fread(buf, 1, sizeof(buf), infp);
+		if (len == 0) {
+			break;
+		}
+		if (sphincs_sign_update(&ctx, buf, len) != 1) {
+			error_print();
+			goto end;
+		}
+	}
+
+	if (sphincs_sign_finish(&ctx, sig, &siglen) != 1) {
+		error_print();
+		goto end;
+	}
+	if (fwrite(sig, 1, siglen, outfp) != siglen) {
+		error_print();
+		goto end;
+	}
+	if (verbose) {
+		sphincs_signature_print(stderr, 0, 0, "sphincs_signature", sig, siglen);
+	}
+
+	ret = 0;
+
+end:
+	sphincs_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;
+}
diff --git a/tools/sphincsverify.c b/tools/sphincsverify.c
new file mode 100644
index 00000000..1ed3e016
--- /dev/null
+++ b/tools/sphincsverify.c
@@ -0,0 +1,158 @@
+/*
+ *  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 = "-pubkey file [-in file] -sig file [-verbose]\n";
+
+static const char *options =
+"Options\n"
+"    -pubkey file                Input public key file\n"
+"    -in file                    Input data file (if not using stdin)\n"
+"    -sig file                   Input signature file\n"
+"    -verbose                    Print public key and signature\n"
+"\n";
+
+int sphincsverify_main(int argc, char **argv)
+{
+	int ret = 1;
+	char *prog = argv[0];
+	char *pubkeyfile = NULL;
+	char *infile = NULL;
+	char *sigfile = NULL;
+	int verbose = 0;
+	FILE *pubkeyfp = NULL;
+	FILE *infp = stdin;
+	FILE *sigfp = NULL;
+	uint8_t pubkeybuf[SPHINCS_PUBLIC_KEY_SIZE];
+	size_t pubkeylen = SPHINCS_PUBLIC_KEY_SIZE;
+	const uint8_t *cp = pubkeybuf;
+	uint8_t sig[SPHINCS_SIGNATURE_SIZE];
+	size_t siglen;
+	SPHINCS_KEY key;
+	SPHINCS_SIGN_CTX ctx;
+	int vr;
+
+	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, "-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, "-sig")) {
+			if (--argc < 1) goto bad;
+			sigfile = *(++argv);
+			if (!(sigfp = fopen(sigfile, "rb"))) {
+				fprintf(stderr, "%s: open '%s' failure: %s\n", prog, sigfile, 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 (!sigfile) {
+		fprintf(stderr, "%s: `-sig` 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 (sphincs_public_key_from_bytes(&key, &cp, &pubkeylen) != 1) {
+		error_print();
+		fprintf(stderr, "%s: invalid public key data\n", prog);
+		goto end;
+	}
+	if (verbose) {
+		sphincs_public_key_print(stderr, 0, 0, "sphincs_public_key", &key);
+	}
+
+	// read signature even if signature not compatible with the public key
+	if ((siglen = fread(sig, 1, SPHINCS_SIGNATURE_SIZE, sigfp)) != SPHINCS_SIGNATURE_SIZE) {
+		fprintf(stderr, "%s: read signature failure\n", prog);
+		goto end;
+	}
+	if (verbose) {
+		sphincs_signature_print(stderr, 0, 0, "sphincs_signature", sig, siglen);
+	}
+	if (sphincs_verify_init(&ctx, &key, sig, siglen) != 1) {
+		error_print();
+		goto end;
+	}
+
+	while (1) {
+		uint8_t buf[1024];
+		size_t len = fread(buf, 1, sizeof(buf), infp);
+		if (len == 0) {
+			break;
+		}
+		if (sphincs_verify_update(&ctx, buf, len) != 1) {
+			error_print();
+			goto end;
+		}
+	}
+	if ((vr = sphincs_verify_finish(&ctx)) < 0) {
+		error_print();
+		goto end;
+	}
+	fprintf(stdout, "verify : %s\n", vr == 1 ? "success" : "failure");
+	if (vr == 1) {
+		ret = 0;
+	}
+
+end:
+	if (pubkeyfp) fclose(pubkeyfp);
+	if (infp && infp != stdin) fclose(infp);
+	if (sigfp) fclose(sigfp);
+	return ret;
+}