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/*
* Copyright (C) 2008 Free Software Foundation
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
#if INTERNAL_GNUTLS_CRYPTO_H_ENABLE_UNSUPPORTED_API
#ifndef GNUTLS_CRYPTO_H
# define GNUTLS_CRYPTO_H
#define GNUTLS_CRYPTO_API_VERSION 0x01
typedef struct {
int (*init)( void** ctx);
int (*setkey)( void* ctx, const void * key, size_t keysize);
int (*setiv)(void* ctx, const void* iv, size_t ivsize);
int (*encrypt)(void* ctx, const void* plain, size_t plainsize, void* encr, size_t encrsize);
int (*decrypt)(void* ctx, const void* encr, size_t encrsize, void* plain, size_t plainsize);
void (*deinit)( void* ctx);
} gnutls_crypto_single_cipher_st;
typedef struct {
int (*init)( void** ctx);
int (*setkey)( void* ctx, const void * key, size_t keysize);
int (*hash)( void* ctx, const void * text, size_t textsize);
int (*copy)( void** dst_ctx, void* src_ctx);
int (*output) ( void* src_ctx, void* digest, size_t digestsize);
void (*deinit)( void* ctx);
} gnutls_crypto_single_mac_st;
typedef struct {
int (*init)( gnutls_cipher_algorithm_t, void** ctx);
int (*setkey)( void* ctx, const void * key, size_t keysize);
int (*setiv)(void* ctx, const void* iv, size_t ivsize);
int (*encrypt)(void* ctx, const void* plain, size_t plainsize, void* encr, size_t encrsize);
int (*decrypt)(void* ctx, const void* encr, size_t encrsize, void* plain, size_t plainsize);
void (*deinit)( void* ctx);
} gnutls_crypto_cipher_st;
typedef struct {
int (*init)( gnutls_mac_algorithm_t, void** ctx);
int (*setkey)( void* ctx, const void * key, size_t keysize);
int (*hash)( void* ctx, const void * text, size_t textsize);
int (*copy)( void** dst_ctx, void* src_ctx);
int (*output) ( void* src_ctx, void* digest, size_t digestsize);
void (*deinit)( void* ctx);
} gnutls_crypto_mac_st;
/* the same... setkey should be null */
typedef gnutls_crypto_single_mac_st gnutls_crypto_single_digest_st;
typedef gnutls_crypto_mac_st gnutls_crypto_digest_st;
typedef enum gnutls_rnd_level
{
GNUTLS_RND_KEY = 2, /* fatal in many sessions if broken */
GNUTLS_RND_RANDOM = 1, /* fatal in session if broken */
GNUTLS_RND_NONCE = 0, /* fatal in parts of session if broken - i.e. vulnerable to statistical analysis */
} gnutls_rnd_level_t;
typedef enum
{
GNUTLS_PK_FLAG_NONE = 0,
} gnutls_pk_flag_t;
typedef struct gnutls_crypto_rnd {
int (*init)( void** ctx);
int (*rnd) ( void* ctx, int /* gnutls_rnd_level_t */ level, void* data, size_t datasize);
void (*deinit)( void* ctx);
} gnutls_crypto_rnd_st;
typedef void* bigint_t;
typedef enum
{
GNUTLS_MPI_FORMAT_USG = 0, /* raw unsigned integer format */
GNUTLS_MPI_FORMAT_STD = 1, /* raw signed integer format - always a leading zero when positive */
} gnutls_bigint_format_t;
typedef struct
{
bigint_t g; /* group generator */
bigint_t p; /* prime */
} gnutls_group_st;
/* Multi precision integer arithmetic */
typedef struct gnutls_crypto_bigint {
bigint_t (*bigint_new)( int nbits);
void (*bigint_release)( bigint_t n);
int (*bigint_cmp)(const bigint_t m1, const bigint_t m2); /* 0 for equality, > 0 for m1>m2, < 0 for m1<m2 */
int (*bigint_cmp_ui)(const bigint_t m1, unsigned long m2); /* as bigint_cmp */
bigint_t (*bigint_mod) (const bigint_t a, const bigint_t b); /* ret = a % b */
bigint_t (*bigint_set) (bigint_t a, const bigint_t b); /* a = b -> ret == a */
bigint_t (*bigint_set_ui) (bigint_t a, unsigned long b); /* a = b -> ret == a */
unsigned int (*bigint_get_nbits)(const bigint_t a);
bigint_t (*bigint_powm) (bigint_t w, const bigint_t b, const bigint_t e,const bigint_t m); /* w = b ^ e mod m */
bigint_t (*bigint_addm) (bigint_t w, const bigint_t a, const bigint_t b, const bigint_t m); /* w = a + b mod m */
bigint_t (*bigint_subm) (bigint_t w, const bigint_t a, const bigint_t b, const bigint_t m); /* w = a - b mod m */
bigint_t (*bigint_mulm) (bigint_t w, const bigint_t a, const bigint_t b, const bigint_t m); /* w = a * b mod m */
bigint_t (*bigint_add) (bigint_t w, const bigint_t a, const bigint_t b); /* w = a + b */
bigint_t (*bigint_sub) (bigint_t w, const bigint_t a, const bigint_t b); /* w = a - b */
bigint_t (*bigint_mul) (bigint_t w, const bigint_t a, const bigint_t b); /* w = a * b */
bigint_t (*bigint_add_ui) (bigint_t w, const bigint_t a, unsigned long b); /* w = a + b */
bigint_t (*bigint_sub_ui) (bigint_t w, const bigint_t a, unsigned long b); /* w = a - b */
bigint_t (*bigint_mul_ui) (bigint_t w, const bigint_t a, unsigned long b); /* w = a * b */
bigint_t (*bigint_div) (bigint_t q, const bigint_t a, const bigint_t b); /* q = a / b */
int (*bigint_prime_check) (const bigint_t pp); /* 0 if prime */
int (*bigint_generate_group) (gnutls_group_st* gg, unsigned int bits);
bigint_t (*bigint_scan) ( const void* buf, size_t buf_size, gnutls_bigint_format_t format); /* reads an bigint from a buffer */
/* stores an bigint into the buffer.
* returns GNUTLS_E_SHORT_MEMORY_BUFFER if buf_size is not sufficient to store this integer,
* and updates the buf_size;
*/
int (*bigint_print)( const bigint_t a, void* buf, size_t* buf_size, gnutls_bigint_format_t format);
} gnutls_crypto_bigint_st;
typedef struct pk_params {
bigint_t *params;
unsigned int params_nr; /* the number of parameters */
unsigned int flags;
} gnutls_pk_params_st;
void gnutls_pk_params_release( gnutls_pk_params_st* p);
void gnutls_pk_params_init( gnutls_pk_params_st* p);
/* params are:
* RSA:
* [0] is modulus
* [1] is public exponent
* [2] is private exponent (private key only)
* [3] is prime1 (p) (private key only)
* [4] is prime2 (q) (private key only)
* [5] is coefficient (u == inverse of p mod q) (private key only)
*
* note that other packages use inverse of q mod p,
* so we need to perform conversions using fixup_params().
*
* DSA:
* [0] is p
* [1] is q
* [2] is g
* [3] is y (public key)
* [4] is x (private key only)
*/
typedef enum
{
GNUTLS_IMPORT,
GNUTLS_EXPORT
} gnutls_direction_t;
/* Public key algorithms */
typedef struct gnutls_crypto_pk {
/* The params structure should contain the private or public key
* parameters, depending on the operation */
int (*encrypt)( gnutls_pk_algorithm_t, gnutls_datum_t* ciphertext,
const gnutls_datum_t* plaintext, const gnutls_pk_params_st* /* public */);
int (*decrypt)( gnutls_pk_algorithm_t, gnutls_datum_t* plaintext,
const gnutls_datum_t* ciphertext, const gnutls_pk_params_st* /* private */);
int (*sign)( gnutls_pk_algorithm_t, gnutls_datum_t* signature,
const gnutls_datum_t* data, const gnutls_pk_params_st* /* private */);
int (*verify)( gnutls_pk_algorithm_t, const gnutls_datum_t* data,
const gnutls_datum_t* signature, const gnutls_pk_params_st* /* public */);
int (*generate)( gnutls_pk_algorithm_t, unsigned int level /*bits*/, gnutls_pk_params_st*);
/* this function should convert params to ones suitable
* for the above functions
*/
int (*pk_fixup_private_params)( gnutls_pk_algorithm_t, gnutls_direction_t, gnutls_pk_params_st*);
} gnutls_crypto_pk_st;
/* priority: infinity for backend algorithms, 90 for kernel algorithms - lowest wins
*/
#define gnutls_crypto_single_cipher_register( algo, prio, st) gnutls_crypto_single_cipher_register2( algo, prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_single_mac_register( algo, prio, st) gnutls_crypto_single_mac_register2( algo, prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_single_digest_register( algo, prio, st) gnutls_crypto_single_digest_register2( algo, prio, GNUTLS_CRYPTO_API_VERSION, st)
int gnutls_crypto_single_cipher_register2( gnutls_cipher_algorithm_t algorithm, int priority, int version, gnutls_crypto_single_cipher_st* s);
int gnutls_crypto_single_mac_register2( gnutls_mac_algorithm_t algorithm, int priority, int version, gnutls_crypto_single_mac_st* s);
int gnutls_crypto_single_digest_register2( gnutls_digest_algorithm_t algorithm, int priority, int version, gnutls_crypto_single_digest_st* s);
#define gnutls_crypto_cipher_register( prio, st) gnutls_crypto_cipher_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_mac_register( prio, st) gnutls_crypto_mac_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_digest_register( prio, st) gnutls_crypto_digest_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
int gnutls_crypto_cipher_register2( int priority, int version, gnutls_crypto_cipher_st* s);
int gnutls_crypto_mac_register2( int priority, int version, gnutls_crypto_mac_st* s);
int gnutls_crypto_digest_register2( int priority, int version, gnutls_crypto_digest_st* s);
#define gnutls_crypto_rnd_register( prio, st) gnutls_crypto_rnd_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_pk_register( prio, st) gnutls_crypto_pk_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
#define gnutls_crypto_bigint_register( prio, st) gnutls_crypto_bigint_register2( prio, GNUTLS_CRYPTO_API_VERSION, st)
int gnutls_crypto_rnd_register2( int priority, int version, gnutls_crypto_rnd_st* s);
int gnutls_crypto_pk_register2( int priority, int version, gnutls_crypto_pk_st* s);
int gnutls_crypto_bigint_register2( int priority, int version, gnutls_crypto_bigint_st* s);
#endif
#endif
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