Mbed TLS v3.6.3
Loading...
Searching...
No Matches
ecdsa.h
Go to the documentation of this file.
1
13/*
14 * Copyright The Mbed TLS Contributors
15 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
16 */
17
18#ifndef MBEDTLS_ECDSA_H
19#define MBEDTLS_ECDSA_H
21
22#include "mbedtls/build_info.h"
23
24#include "mbedtls/ecp.h"
25#include "mbedtls/md.h"
26
36/*
37 * Ecdsa-Sig-Value ::= SEQUENCE {
38 * r INTEGER,
39 * s INTEGER
40 * }
41 *
42 * For each of r and s, the value (V) may include an extra initial "0" bit.
43 */
44#define MBEDTLS_ECDSA_MAX_SIG_LEN(bits) \
45 (/*T,L of SEQUENCE*/ ((bits) >= 61 * 8 ? 3 : 2) + \
46 /*T,L of r,s*/ 2 * (((bits) >= 127 * 8 ? 3 : 2) + \
47 /*V of r,s*/ ((bits) + 8) / 8))
48
50#define MBEDTLS_ECDSA_MAX_LEN MBEDTLS_ECDSA_MAX_SIG_LEN(MBEDTLS_ECP_MAX_BITS)
51
52#ifdef __cplusplus
53extern "C" {
54#endif
55
69
70#if defined(MBEDTLS_ECP_RESTARTABLE)
71
77typedef struct mbedtls_ecdsa_restart_ver mbedtls_ecdsa_restart_ver_ctx;
78
84typedef struct mbedtls_ecdsa_restart_sig mbedtls_ecdsa_restart_sig_ctx;
85
86#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
92typedef struct mbedtls_ecdsa_restart_det mbedtls_ecdsa_restart_det_ctx;
93#endif
94
98typedef struct {
101 mbedtls_ecdsa_restart_ver_ctx *MBEDTLS_PRIVATE(ver);
102 mbedtls_ecdsa_restart_sig_ctx *MBEDTLS_PRIVATE(sig);
103#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
104 mbedtls_ecdsa_restart_det_ctx *MBEDTLS_PRIVATE(det);
105#endif
107
108#else /* MBEDTLS_ECP_RESTARTABLE */
109
110/* Now we can declare functions that take a pointer to that */
112
113#endif /* MBEDTLS_ECP_RESTARTABLE */
114
124
162 const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
163 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng);
164
165#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
207 mbedtls_mpi *s, const mbedtls_mpi *d,
208 const unsigned char *buf, size_t blen,
209 mbedtls_md_type_t md_alg,
210 int (*f_rng_blind)(void *, unsigned char *, size_t),
211 void *p_rng_blind);
212#endif /* MBEDTLS_ECDSA_DETERMINISTIC */
213
214#if !defined(MBEDTLS_ECDSA_SIGN_ALT)
272 const mbedtls_mpi *d,
273 const unsigned char *buf, size_t blen,
274 int (*f_rng)(void *, unsigned char *, size_t),
275 void *p_rng,
276 int (*f_rng_blind)(void *, unsigned char *, size_t),
277 void *p_rng_blind,
279
280#endif /* !MBEDTLS_ECDSA_SIGN_ALT */
281
282#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
283
335 const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
336 mbedtls_md_type_t md_alg,
337 int (*f_rng_blind)(void *, unsigned char *, size_t),
338 void *p_rng_blind,
340
341#endif /* MBEDTLS_ECDSA_DETERMINISTIC */
342
374 const unsigned char *buf, size_t blen,
375 const mbedtls_ecp_point *Q, const mbedtls_mpi *r,
376 const mbedtls_mpi *s);
377
378#if !defined(MBEDTLS_ECDSA_VERIFY_ALT)
415 const unsigned char *buf, size_t blen,
416 const mbedtls_ecp_point *Q,
417 const mbedtls_mpi *r,
418 const mbedtls_mpi *s,
420
421#endif /* !MBEDTLS_ECDSA_VERIFY_ALT */
422
473 mbedtls_md_type_t md_alg,
474 const unsigned char *hash, size_t hlen,
475 unsigned char *sig, size_t sig_size, size_t *slen,
476 int (*f_rng)(void *, unsigned char *, size_t),
477 void *p_rng);
478
520 mbedtls_md_type_t md_alg,
521 const unsigned char *hash, size_t hlen,
522 unsigned char *sig, size_t sig_size, size_t *slen,
523 int (*f_rng)(void *, unsigned char *, size_t),
524 void *p_rng,
526
555 const unsigned char *hash, size_t hlen,
556 const unsigned char *sig, size_t slen);
557
590 const unsigned char *hash, size_t hlen,
591 const unsigned char *sig, size_t slen,
593
611 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng);
612
629 const mbedtls_ecp_keypair *key);
630
638
647
648#if defined(MBEDTLS_ECP_RESTARTABLE)
655void mbedtls_ecdsa_restart_init(mbedtls_ecdsa_restart_ctx *ctx);
656
664void mbedtls_ecdsa_restart_free(mbedtls_ecdsa_restart_ctx *ctx);
665#endif /* MBEDTLS_ECP_RESTARTABLE */
666
667#ifdef __cplusplus
668}
669#endif
670
671#endif /* ecdsa.h */
int mbedtls_ecdsa_verify(mbedtls_ecp_group *grp, const unsigned char *buf, size_t blen, const mbedtls_ecp_point *Q, const mbedtls_mpi *r, const mbedtls_mpi *s)
This function verifies the ECDSA signature of a previously-hashed message.
int mbedtls_ecdsa_sign_det_ext(mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s, const mbedtls_mpi *d, const unsigned char *buf, size_t blen, mbedtls_md_type_t md_alg, int(*f_rng_blind)(void *, unsigned char *, size_t), void *p_rng_blind)
This function computes the ECDSA signature of a previously-hashed message, deterministic version.
void mbedtls_ecdsa_free(mbedtls_ecdsa_context *ctx)
This function frees an ECDSA context.
int mbedtls_ecdsa_sign_det_restartable(mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s, const mbedtls_mpi *d, const unsigned char *buf, size_t blen, mbedtls_md_type_t md_alg, int(*f_rng_blind)(void *, unsigned char *, size_t), void *p_rng_blind, mbedtls_ecdsa_restart_ctx *rs_ctx)
This function computes the ECDSA signature of a previously-hashed message, in a restartable way.
int mbedtls_ecdsa_verify_restartable(mbedtls_ecp_group *grp, const unsigned char *buf, size_t blen, const mbedtls_ecp_point *Q, const mbedtls_mpi *r, const mbedtls_mpi *s, mbedtls_ecdsa_restart_ctx *rs_ctx)
This function verifies the ECDSA signature of a previously-hashed message, in a restartable manner.
int mbedtls_ecdsa_from_keypair(mbedtls_ecdsa_context *ctx, const mbedtls_ecp_keypair *key)
This function sets up an ECDSA context from an EC key pair.
int mbedtls_ecdsa_read_signature_restartable(mbedtls_ecdsa_context *ctx, const unsigned char *hash, size_t hlen, const unsigned char *sig, size_t slen, mbedtls_ecdsa_restart_ctx *rs_ctx)
This function reads and verifies an ECDSA signature, in a restartable way.
int mbedtls_ecdsa_write_signature_restartable(mbedtls_ecdsa_context *ctx, mbedtls_md_type_t md_alg, const unsigned char *hash, size_t hlen, unsigned char *sig, size_t sig_size, size_t *slen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng, mbedtls_ecdsa_restart_ctx *rs_ctx)
This function computes the ECDSA signature and writes it to a buffer, in a restartable way.
int mbedtls_ecdsa_read_signature(mbedtls_ecdsa_context *ctx, const unsigned char *hash, size_t hlen, const unsigned char *sig, size_t slen)
This function reads and verifies an ECDSA signature.
mbedtls_ecp_keypair mbedtls_ecdsa_context
The ECDSA context structure.
Definition: ecdsa.h:68
int mbedtls_ecdsa_genkey(mbedtls_ecdsa_context *ctx, mbedtls_ecp_group_id gid, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function generates an ECDSA keypair on the given curve.
int mbedtls_ecdsa_can_do(mbedtls_ecp_group_id gid)
This function checks whether a given group can be used for ECDSA.
int mbedtls_ecdsa_write_signature(mbedtls_ecdsa_context *ctx, mbedtls_md_type_t md_alg, const unsigned char *hash, size_t hlen, unsigned char *sig, size_t sig_size, size_t *slen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function computes the ECDSA signature and writes it to a buffer, serialized as defined in RFC-44...
void mbedtls_ecdsa_restart_ctx
Definition: ecdsa.h:111
void mbedtls_ecdsa_init(mbedtls_ecdsa_context *ctx)
This function initializes an ECDSA context.
int mbedtls_ecdsa_sign(mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s, const mbedtls_mpi *d, const unsigned char *buf, size_t blen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function computes the ECDSA signature of a previously-hashed message.
int mbedtls_ecdsa_sign_restartable(mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s, const mbedtls_mpi *d, const unsigned char *buf, size_t blen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng, int(*f_rng_blind)(void *, unsigned char *, size_t), void *p_rng_blind, mbedtls_ecdsa_restart_ctx *rs_ctx)
This function computes the ECDSA signature of a previously-hashed message, in a restartable way.
This file provides an API for Elliptic Curves over GF(P) (ECP).
void mbedtls_ecp_restart_ctx
Definition: ecp.h:416
mbedtls_ecp_group_id
Definition: ecp.h:102
Build-time configuration info.
This file contains the generic functions for message-digest (hashing) and HMAC.
mbedtls_md_type_t
Supported message digests.
Definition: md.h:47
Macro wrapper for struct's members.
#define MBEDTLS_PRIVATE(member)
The ECP group structure.
Definition: ecp.h:233
The ECP key-pair structure.
Definition: ecp.h:428
The ECP point structure, in Jacobian coordinates.
Definition: ecp.h:158
MPI structure.
Definition: bignum.h:207