dsa.h

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/*
 *  Digital Signature Algorithm (DSA)
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 */
 
#ifndef MBEDTLS_DSA_H
#define MBEDTLS_DSA_H
 
#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include "bignum.h"
#include "md.h"
 
/*
 * DSA-specific error codes
 */
#define MBEDTLS_ERR_DSA_BAD_INPUT_DATA                    -0x3180  
#define MBEDTLS_ERR_DSA_INVALID_KEY                       -0x3200  
#define MBEDTLS_ERR_DSA_VERIFY_FAILED                     -0x3280  
#define MBEDTLS_ERR_DSA_ALLOC_FAILED                      -0x3300  
#define MBEDTLS_ERR_DSA_RANDOM_FAILED                     -0x3380  
#define MBEDTLS_ERR_DSA_FILE_IO_ERROR                     -0x3400  
#define MBEDTLS_ERR_DSA_SIG_LEN_MISMATCH                  -0x3480  
#define MBEDTLS_DSA_ASN_SIGNATURE_MAX_LEN 64
 
/* Max DSA group size in bytes */
#define MBEDTLS_DSA_MAX_GROUP 64
 
/* Max DSA modulus size in bytes (the actual DSA size, max 8192 bits) */
#define MBEDTLS_DSA_MAX_MODULUS 1024
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct mbedtls_dsa_context
{
    size_t len;
    mbedtls_mpi P;           
    mbedtls_mpi Q;           
    mbedtls_mpi G;           
    mbedtls_mpi Y;           
    mbedtls_mpi X;           
}
mbedtls_dsa_context;
 
void mbedtls_dsa_init( mbedtls_dsa_context *ctx );
 
void mbedtls_dsa_free( mbedtls_dsa_context *ctx );
 
int mbedtls_dsa_set_group( mbedtls_dsa_context *ctx, const mbedtls_mpi *P, const mbedtls_mpi *Q, const mbedtls_mpi *G );
 
int mbedtls_dsa_genkey( mbedtls_dsa_context *ctx, size_t group_size, size_t modulus_size,
                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
 
int mbedtls_dsa_check_pqg( const mbedtls_mpi *P, const mbedtls_mpi *Q, const mbedtls_mpi *G );
 
int mbedtls_dsa_check_pubkey( const mbedtls_dsa_context *ctx );
 
int mbedtls_dsa_check_privkey( const mbedtls_dsa_context *ctx );
 
int mbedtls_dsa_pubkey_from_privkey( mbedtls_dsa_context *ctx );
 
int mbedtls_dsa_sign( mbedtls_dsa_context *ctx,
                      const unsigned char *hash, size_t hlen,
                      unsigned char *sig, size_t *slen,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );
 
int mbedtls_dsa_verify( mbedtls_dsa_context *ctx,
                        const unsigned char *hash, size_t hlen,
                        const unsigned char *sig, size_t slen );
 
#if defined(MBEDTLS_SELF_TEST)
int mbedtls_dsa_self_test( int verbose );
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* MBEDTLS_DSA_H */