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Add ECDSA with curve P-256

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for TLS testing
This commit is contained in:
Zhi Guan
2026-01-24 12:27:12 +08:00
parent 05ba2f8e54
commit a15e0f34c7
20 changed files with 3663 additions and 31 deletions
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68
include/gmssl/ecdsa.h Normal file
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/*
* 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
*/
#ifndef GMSSL_ECDSA_H
#define GMSSL_ECDSA_H
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <gmssl/sha2.h>
#include <gmssl/secp256r1_key.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
secp256r1_t r;
secp256r1_t s;
} ECDSA_SIGNATURE;
#define ECDSA_SIGNATURE_COMPACT_SIZE 70
#define ECDSA_SIGNATURE_TYPICAL_SIZE 71
#define ECDSA_SIGNATURE_MAX_SIZE 72
int ecdsa_signature_to_der(const ECDSA_SIGNATURE *sig, uint8_t **out, size_t *outlen);
int ecdsa_signature_from_der(ECDSA_SIGNATURE *sig, const uint8_t **in, size_t *inlen);
int ecdsa_signature_print_ex(FILE *fp, int fmt, int ind, const char *label, const ECDSA_SIGNATURE *sig);
int ecdsa_signature_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *sig, size_t siglen);
int ecdsa_do_sign_ex(const SECP256R1_KEY *key, const secp256r1_t k, const uint8_t dgst[32], ECDSA_SIGNATURE *sig);
int ecdsa_do_sign(const SECP256R1_KEY *key, const uint8_t dgst[32], ECDSA_SIGNATURE *sig);
int ecdsa_do_verify(const SECP256R1_KEY *key, const uint8_t dgst[32], const ECDSA_SIGNATURE *sig);
int ecdsa_sign(const SECP256R1_KEY *key, const uint8_t dgst[32], uint8_t *sig, size_t *siglen);
int ecdsa_sign_fixlen(const SECP256R1_KEY *key, const uint8_t dgst[32], size_t siglen, uint8_t *sig);
int ecdsa_verify(const SECP256R1_KEY *key, const uint8_t dgst[32], const uint8_t *sig, size_t siglen);
typedef struct {
SHA256_CTX sha256_ctx;
SECP256R1_KEY key;
ECDSA_SIGNATURE sig;
} ECDSA_SIGN_CTX;
int ecdsa_sign_init(ECDSA_SIGN_CTX *ctx, const SECP256R1_KEY *key);
int ecdsa_sign_update(ECDSA_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
int ecdsa_sign_finish(ECDSA_SIGN_CTX *ctx, uint8_t *sig, size_t *siglen);
int ecdsa_sign_finish_fixlen(ECDSA_SIGN_CTX *ctx, size_t siglen, uint8_t *sig);
int ecdsa_verify_init(ECDSA_SIGN_CTX *ctx, const SECP256R1_KEY *key, const uint8_t *sig, size_t siglen);
int ecdsa_verify_update(ECDSA_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
int ecdsa_verify_finish(ECDSA_SIGN_CTX *ctx);
#ifdef __cplusplus
}
#endif
#endif