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ecdsa.h
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1 
13 /*
14  * Copyright The Mbed TLS Contributors
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16  *
17  * This file is provided under the Apache License 2.0, or the
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56 
57 #ifndef MBEDTLS_ECDSA_H
58 #define MBEDTLS_ECDSA_H
59 
60 #if !defined(MBEDTLS_CONFIG_FILE)
61 #include "config.h"
62 #else
63 #include MBEDTLS_CONFIG_FILE
64 #endif
65 
66 #include "ecp.h"
67 #include "md.h"
68 
69 /*
70  * RFC-4492 page 20:
71  *
72  * Ecdsa-Sig-Value ::= SEQUENCE {
73  * r INTEGER,
74  * s INTEGER
75  * }
76  *
77  * Size is at most
78  * 1 (tag) + 1 (len) + 1 (initial 0) + ECP_MAX_BYTES for each of r and s,
79  * twice that + 1 (tag) + 2 (len) for the sequence
80  * (assuming ECP_MAX_BYTES is less than 126 for r and s,
81  * and less than 124 (total len <= 255) for the sequence)
82  */
83 #if MBEDTLS_ECP_MAX_BYTES > 124
84 #error "MBEDTLS_ECP_MAX_BYTES bigger than expected, please fix MBEDTLS_ECDSA_MAX_LEN"
85 #endif
86 
87 #define MBEDTLS_ECDSA_MAX_LEN ( 3 + 2 * ( 3 + MBEDTLS_ECP_MAX_BYTES ) )
88 
89 #ifdef __cplusplus
90 extern "C" {
91 #endif
92 
101 
102 #if defined(MBEDTLS_ECP_RESTARTABLE)
103 
109 typedef struct mbedtls_ecdsa_restart_ver mbedtls_ecdsa_restart_ver_ctx;
110 
116 typedef struct mbedtls_ecdsa_restart_sig mbedtls_ecdsa_restart_sig_ctx;
117 
118 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
119 
124 typedef struct mbedtls_ecdsa_restart_det mbedtls_ecdsa_restart_det_ctx;
125 #endif
126 
130 typedef struct
131 {
134  mbedtls_ecdsa_restart_ver_ctx *ver;
135  mbedtls_ecdsa_restart_sig_ctx *sig;
136 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
137  mbedtls_ecdsa_restart_det_ctx *det;
138 #endif
140 
141 #else /* MBEDTLS_ECP_RESTARTABLE */
142 
143 /* Now we can declare functions that take a pointer to that */
145 
146 #endif /* MBEDTLS_ECP_RESTARTABLE */
147 
185  const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
186  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
187 
188 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
189 
238  mbedtls_mpi *s, const mbedtls_mpi *d,
239  const unsigned char *buf, size_t blen,
240  mbedtls_md_type_t md_alg );
281  mbedtls_mpi *s, const mbedtls_mpi *d,
282  const unsigned char *buf, size_t blen,
283  mbedtls_md_type_t md_alg,
284  int (*f_rng_blind)(void *, unsigned char *,
285  size_t),
286  void *p_rng_blind );
287 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
288 
322  const unsigned char *buf, size_t blen,
323  const mbedtls_ecp_point *Q, const mbedtls_mpi *r,
324  const mbedtls_mpi *s);
325 
374  mbedtls_md_type_t md_alg,
375  const unsigned char *hash, size_t hlen,
376  unsigned char *sig, size_t *slen,
377  int (*f_rng)(void *, unsigned char *, size_t),
378  void *p_rng );
379 
420  mbedtls_md_type_t md_alg,
421  const unsigned char *hash, size_t hlen,
422  unsigned char *sig, size_t *slen,
423  int (*f_rng)(void *, unsigned char *, size_t),
424  void *p_rng,
425  mbedtls_ecdsa_restart_ctx *rs_ctx );
426 
427 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
428 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
429 #if defined(MBEDTLS_DEPRECATED_WARNING)
430 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
431 #else
432 #define MBEDTLS_DEPRECATED
433 #endif
434 
478  const unsigned char *hash, size_t hlen,
479  unsigned char *sig, size_t *slen,
481 #undef MBEDTLS_DEPRECATED
482 #endif /* MBEDTLS_DEPRECATED_REMOVED */
483 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
484 
513  const unsigned char *hash, size_t hlen,
514  const unsigned char *sig, size_t slen );
515 
548  const unsigned char *hash, size_t hlen,
549  const unsigned char *sig, size_t slen,
550  mbedtls_ecdsa_restart_ctx *rs_ctx );
551 
569  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
570 
587  const mbedtls_ecp_keypair *key );
588 
596 
605 
606 #if defined(MBEDTLS_ECP_RESTARTABLE)
607 
613 void mbedtls_ecdsa_restart_init( mbedtls_ecdsa_restart_ctx *ctx );
614 
622 void mbedtls_ecdsa_restart_free( mbedtls_ecdsa_restart_ctx *ctx );
623 #endif /* MBEDTLS_ECP_RESTARTABLE */
624 
625 #ifdef __cplusplus
626 }
627 #endif
628 
629 #endif /* ecdsa.h */
GLdouble GLdouble GLdouble r
Definition: gl.h:2055
void mbedtls_ecdsa_free(mbedtls_ecdsa_context *ctx)
This function frees an ECDSA context.
This file provides an API for Elliptic Curves over GF(P) (ECP).
The ECP key-pair structure.
Definition: ecp.h:397
void mbedtls_ecdsa_restart_ctx
Definition: ecdsa.h:144
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
void mbedtls_ecdsa_init(mbedtls_ecdsa_context *ctx)
This function initializes an ECDSA context.
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.
The ECP group structure.
Definition: ecp.h:232
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_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_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 *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_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.
int mbedtls_ecdsa_sign_det(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)
This function computes the ECDSA signature of a previously-hashed message, deterministic version.
mbedtls_ecp_keypair mbedtls_ecdsa_context
The ECDSA context structure.
Definition: ecdsa.h:100
mbedtls_ecp_group_id
Definition: ecp.h:102
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.
GLdouble s
Definition: gl.h:2039
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.
This file contains the generic message-digest wrapper.
int mbedtls_ecdsa_write_signature_det(mbedtls_ecdsa_context *ctx, const unsigned char *hash, size_t hlen, unsigned char *sig, size_t *slen, mbedtls_md_type_t md_alg) MBEDTLS_DEPRECATED
This function computes an ECDSA signature and writes it to a buffer, serialized as defined in RFC-449...
MPI structure.
Definition: bignum.h:210
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.
The ECP point structure, in Jacobian coordinates.
Definition: ecp.h:149
mbedtls_md_type_t
Supported message digests.
Definition: md.h:83
Definition: _hash_fun.h:40
#define MBEDTLS_DEPRECATED
Definition: ecdsa.h:432
#define d
Definition: ke_i.h:81
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 *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...
Definition: path.c:41