mbed TLS v2.0.0
ecdsa.h
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1 
24 #ifndef MBEDTLS_ECDSA_H
25 #define MBEDTLS_ECDSA_H
26 
27 #include "ecp.h"
28 #include "md.h"
29 
30 /*
31  * RFC 4492 page 20:
32  *
33  * Ecdsa-Sig-Value ::= SEQUENCE {
34  * r INTEGER,
35  * s INTEGER
36  * }
37  *
38  * Size is at most
39  * 1 (tag) + 1 (len) + 1 (initial 0) + ECP_MAX_BYTES for each of r and s,
40  * twice that + 1 (tag) + 2 (len) for the sequence
41  * (assuming ECP_MAX_BYTES is less than 126 for r and s,
42  * and less than 124 (total len <= 255) for the sequence)
43  */
44 #if MBEDTLS_ECP_MAX_BYTES > 124
45 #error "MBEDTLS_ECP_MAX_BYTES bigger than expected, please fix MBEDTLS_ECDSA_MAX_LEN"
46 #endif
47 
48 #define MBEDTLS_ECDSA_MAX_LEN ( 3 + 2 * ( 3 + MBEDTLS_ECP_MAX_BYTES ) )
49 
54 
55 #ifdef __cplusplus
56 extern "C" {
57 #endif
58 
77  const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
78  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
79 
80 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
81 
97  const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
98  mbedtls_md_type_t md_alg );
99 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
100 
116  const unsigned char *buf, size_t blen,
117  const mbedtls_ecp_point *Q, const mbedtls_mpi *r, const mbedtls_mpi *s);
118 
145  const unsigned char *hash, size_t hlen,
146  unsigned char *sig, size_t *slen,
147  int (*f_rng)(void *, unsigned char *, size_t),
148  void *p_rng );
149 
150 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
151 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
152 #if defined(MBEDTLS_DEPRECATED_WARNING)
153 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
154 #else
155 #define MBEDTLS_DEPRECATED
156 #endif
157 
181  const unsigned char *hash, size_t hlen,
182  unsigned char *sig, size_t *slen,
184 #undef MBEDTLS_DEPRECATED
185 #endif /* MBEDTLS_DEPRECATED_REMOVED */
186 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
187 
204  const unsigned char *hash, size_t hlen,
205  const unsigned char *sig, size_t slen );
206 
219  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
220 
230 
237 
244 
245 #ifdef __cplusplus
246 }
247 #endif
248 
249 #endif /* ecdsa.h */
void mbedtls_ecdsa_free(mbedtls_ecdsa_context *ctx)
Free context.
Elliptic curves over GF(p)
ECP key pair structure.
Definition: ecp.h:157
void mbedtls_ecdsa_init(mbedtls_ecdsa_context *ctx)
Initialize 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)
Verify ECDSA signature of a previously hashed message.
ECP group structure.
Definition: ecp.h:130
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)
Compute ECDSA signature of a previously hashed message.
int mbedtls_ecdsa_from_keypair(mbedtls_ecdsa_context *ctx, const mbedtls_ecp_keypair *key)
Set an ECDSA context from an EC key pair.
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)
Compute ECDSA signature of a previously hashed message, deterministic version (RFC 6979)...
mbedtls_ecp_keypair mbedtls_ecdsa_context
ECDSA context structure.
Definition: ecdsa.h:53
mbedtls_ecp_group_id
Domain parameters (curve, subgroup and generator) identifiers.
Definition: ecp.h:54
int mbedtls_ecdsa_genkey(mbedtls_ecdsa_context *ctx, mbedtls_ecp_group_id gid, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
Generate an ECDSA keypair on the given curve.
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
Compute ECDSA signature and write it to buffer, serialized as defined in RFC 4492 page 20...
MPI structure.
Definition: bignum.h:144
int mbedtls_ecdsa_read_signature(mbedtls_ecdsa_context *ctx, const unsigned char *hash, size_t hlen, const unsigned char *sig, size_t slen)
Read and verify an ECDSA signature.
ECP point structure (jacobian coordinates)
Definition: ecp.h:98
mbedtls_md_type_t
Definition: md.h:44
#define MBEDTLS_DEPRECATED
Definition: ecdsa.h:155
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)
Compute ECDSA signature and write it to buffer, serialized as defined in RFC 4492 page 20...