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ecdh.h
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1 
15 /*
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58 
59 #ifndef MBEDTLS_ECDH_H
60 #define MBEDTLS_ECDH_H
61 
62 #if !defined(MBEDTLS_CONFIG_FILE)
63 #include "config.h"
64 #else
65 #include MBEDTLS_CONFIG_FILE
66 #endif
67 
68 #include "ecp.h"
69 
70 /*
71  * Use a backward compatible ECDH context.
72  *
73  * This flag is always enabled for now and future versions might add a
74  * configuration option that conditionally undefines this flag.
75  * The configuration option in question may have a different name.
76  *
77  * Features undefining this flag, must have a warning in their description in
78  * config.h stating that the feature breaks backward compatibility.
79  */
80 #define MBEDTLS_ECDH_LEGACY_CONTEXT
81 
82 #ifdef __cplusplus
83 extern "C" {
84 #endif
85 
89 typedef enum
90 {
94 
95 #if !defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
96 
102 typedef enum
103 {
104  MBEDTLS_ECDH_VARIANT_NONE = 0,
105  MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0,
106 } mbedtls_ecdh_variant;
107 
115 typedef struct mbedtls_ecdh_context_mbed
116 {
117  mbedtls_ecp_group grp;
118  mbedtls_mpi d;
120  mbedtls_ecp_point Qp;
121  mbedtls_mpi z;
122 #if defined(MBEDTLS_ECP_RESTARTABLE)
124 #endif
125 } mbedtls_ecdh_context_mbed;
126 #endif
127 
135 typedef struct mbedtls_ecdh_context
136 {
137 #if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
147 #if defined(MBEDTLS_ECP_RESTARTABLE)
148  int restart_enabled;
150 #endif /* MBEDTLS_ECP_RESTARTABLE */
151 #else
154  mbedtls_ecp_group_id grp_id;
155  mbedtls_ecdh_variant var;
156  union
157  {
158  mbedtls_ecdh_context_mbed mbed_ecdh;
159  } ctx;
162 #if defined(MBEDTLS_ECP_RESTARTABLE)
163  uint8_t restart_enabled;
168 #endif /* MBEDTLS_ECP_RESTARTABLE */
169 #endif /* MBEDTLS_ECDH_LEGACY_CONTEXT */
170 }
172 
199  int (*f_rng)(void *, unsigned char *, size_t),
200  void *p_rng );
201 
237  const mbedtls_ecp_point *Q, const mbedtls_mpi *d,
238  int (*f_rng)(void *, unsigned char *, size_t),
239  void *p_rng );
240 
247 
265  mbedtls_ecp_group_id grp_id );
266 
275 
302  unsigned char *buf, size_t blen,
303  int (*f_rng)(void *, unsigned char *, size_t),
304  void *p_rng );
305 
331  const unsigned char **buf,
332  const unsigned char *end );
333 
354  const mbedtls_ecp_keypair *key,
355  mbedtls_ecdh_side side );
356 
384  unsigned char *buf, size_t blen,
385  int (*f_rng)(void *, unsigned char *, size_t),
386  void *p_rng );
387 
408  const unsigned char *buf, size_t blen );
409 
441  unsigned char *buf, size_t blen,
442  int (*f_rng)(void *, unsigned char *, size_t),
443  void *p_rng );
444 
445 #if defined(MBEDTLS_ECP_RESTARTABLE)
446 
458 void mbedtls_ecdh_enable_restart( mbedtls_ecdh_context *ctx );
459 #endif /* MBEDTLS_ECP_RESTARTABLE */
460 
461 #ifdef __cplusplus
462 }
463 #endif
464 
465 #endif /* ecdh.h */
const char * var
Definition: shader.c:5666
int mbedtls_ecdh_make_params(mbedtls_ecdh_context *ctx, size_t *olen, unsigned char *buf, size_t blen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function generates an EC key pair and exports its in the format used in a TLS ServerKeyExchange ...
mbedtls_mpi z
Definition: ecdh.h:142
This file provides an API for Elliptic Curves over GF(P) (ECP).
mbedtls_mpi d
Definition: ecdh.h:139
int mbedtls_ecdh_make_public(mbedtls_ecdh_context *ctx, size_t *olen, unsigned char *buf, size_t blen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function generates a public key and exports it as a TLS ClientKeyExchange payload.
The ECP key-pair structure.
Definition: ecp.h:397
void mbedtls_ecdh_free(mbedtls_ecdh_context *ctx)
This function frees a context.
int mbedtls_ecdh_setup(mbedtls_ecdh_context *ctx, mbedtls_ecp_group_id grp_id)
This function sets up the ECDH context with the information given.
mbedtls_mpi _d
Definition: ecdh.h:146
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
int mbedtls_ecdh_read_public(mbedtls_ecdh_context *ctx, const unsigned char *buf, size_t blen)
This function parses and processes the ECDHE payload of a TLS ClientKeyExchange message.
The ECP group structure.
Definition: ecp.h:232
int mbedtls_ecdh_compute_shared(mbedtls_ecp_group *grp, mbedtls_mpi *z, const mbedtls_ecp_point *Q, const mbedtls_mpi *d, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function computes the shared secret.
GLdouble GLdouble z
Definition: glext.h:5874
mbedtls_ecp_point Vi
Definition: ecdh.h:144
mbedtls_ecp_group grp
Definition: ecdh.h:138
void mbedtls_ecdh_init(mbedtls_ecdh_context *ctx)
This function initializes an ECDH context.
int mbedtls_ecdh_gen_public(mbedtls_ecp_group *grp, mbedtls_mpi *d, mbedtls_ecp_point *Q, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function generates an ECDH keypair on an elliptic curve.
mbedtls_ecdh_side
Definition: ecdh.h:89
int mbedtls_ecdh_read_params(mbedtls_ecdh_context *ctx, const unsigned char **buf, const unsigned char *end)
This function parses the ECDHE parameters in a TLS ServerKeyExchange handshake message.
GLuint GLuint end
Definition: gl.h:1545
mbedtls_ecp_group_id
Definition: ecp.h:102
struct mbedtls_ecdh_context mbedtls_ecdh_context
The ECDH context structure.
The ECDH context structure.
Definition: ecdh.h:135
mbedtls_ecp_point Qp
Definition: ecdh.h:141
BYTE uint8_t
Definition: msvideo1.c:66
mbedtls_ecp_point Q
Definition: ecdh.h:140
mbedtls_ecp_point Vf
Definition: ecdh.h:145
MPI structure.
Definition: bignum.h:210
int mbedtls_ecdh_calc_secret(mbedtls_ecdh_context *ctx, size_t *olen, unsigned char *buf, size_t blen, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng)
This function derives and exports the shared secret.
The ECP point structure, in Jacobian coordinates.
Definition: ecp.h:149
int mbedtls_ecdh_get_params(mbedtls_ecdh_context *ctx, const mbedtls_ecp_keypair *key, mbedtls_ecdh_side side)
This function sets up an ECDH context from an EC key.
#define d
Definition: ke_i.h:81
Definition: path.c:41