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dsa.h (4414B)

      1 /* dsa.h
      2  *
      3  * Copyright (C) 2006-2025 wolfSSL Inc.
      4  *
      5  * This file is part of wolfSSL.
      6  *
      7  * wolfSSL is free software; you can redistribute it and/or modify
      8  * it under the terms of the GNU General Public License as published by
      9  * the Free Software Foundation; either version 3 of the License, or
     10  * (at your option) any later version.
     11  *
     12  * wolfSSL is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15  * GNU General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU General Public License
     18  * along with this program; if not, write to the Free Software
     19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
     20  */
     21 
     22 /*!
     23     \file wolfssl/wolfcrypt/dsa.h
     24 */
     25 
     26 #ifndef WOLF_CRYPT_DSA_H
     27 #define WOLF_CRYPT_DSA_H
     28 
     29 #include <wolfssl/wolfcrypt/types.h>
     30 
     31 #ifndef NO_DSA
     32 
     33 #include <wolfssl/wolfcrypt/wolfmath.h>
     34 #include <wolfssl/wolfcrypt/random.h>
     35 
     36 /* for DSA reverse compatibility */
     37 #define InitDsaKey wc_InitDsaKey
     38 #define FreeDsaKey wc_FreeDsaKey
     39 #define DsaSign wc_DsaSign
     40 #define DsaVerify wc_DsaVerify
     41 #define DsaPublicKeyDecode wc_DsaPublicKeyDecode
     42 #define DsaPrivateKeyDecode wc_DsaPrivateKeyDecode
     43 #define DsaKeyToDer wc_DsaKeyToDer
     44 
     45 #ifdef __cplusplus
     46     extern "C" {
     47 #endif
     48 
     49 
     50 enum {
     51     DSA_PUBLIC   = 0,
     52     DSA_PRIVATE  = 1
     53 };
     54 
     55 enum {
     56     /* 160 bit q length */
     57     DSA_160_HALF_SIZE = 20,            /* r and s size  */
     58     DSA_160_SIG_SIZE  = 40,            /* signature size */
     59     DSA_HALF_SIZE = DSA_160_HALF_SIZE, /* kept for compatibility  */
     60     DSA_SIG_SIZE = DSA_160_SIG_SIZE,   /* kept for compatibility */
     61     /* 256 bit q length */
     62     DSA_256_HALF_SIZE = 32,            /* r and s size  */
     63     DSA_256_SIG_SIZE  = 64,            /* signature size */
     64 
     65     DSA_MIN_HALF_SIZE = DSA_160_HALF_SIZE,
     66     DSA_MIN_SIG_SIZE = DSA_160_SIG_SIZE,
     67 
     68     DSA_MAX_HALF_SIZE = DSA_256_HALF_SIZE,
     69     DSA_MAX_SIG_SIZE = DSA_256_SIG_SIZE
     70 };
     71 
     72 /* DSA */
     73 typedef struct DsaKey {
     74     mp_int p, q, g, y, x;
     75     int   type;                               /* public or private */
     76     void* heap;                               /* memory hint */
     77 } DsaKey;
     78 
     79 WOLFSSL_API int wc_InitDsaKey(DsaKey* key);
     80 WOLFSSL_API int wc_InitDsaKey_h(DsaKey* key, void* h);
     81 WOLFSSL_API void wc_FreeDsaKey(DsaKey* key);
     82 WOLFSSL_API int wc_DsaSign(const byte* digest, byte* out,
     83                            DsaKey* key, WC_RNG* rng);
     84 WOLFSSL_API int wc_DsaSign_ex(const byte* digest, word32 digestSz, byte* out,
     85                            DsaKey* key, WC_RNG* rng);
     86 WOLFSSL_API int wc_DsaVerify(const byte* digest, const byte* sig,
     87                              DsaKey* key, int* answer);
     88 WOLFSSL_API int wc_DsaVerify_ex(const byte* digest, word32 digestSz,
     89                                 const byte* sig, DsaKey* key, int* answer);
     90 WOLFSSL_API int wc_DsaPublicKeyDecode(const byte* input, word32* inOutIdx,
     91                                       DsaKey* key, word32 inSz);
     92 WOLFSSL_API int wc_DsaPrivateKeyDecode(const byte* input, word32* inOutIdx,
     93                                        DsaKey* key, word32 inSz);
     94 WOLFSSL_API int wc_DsaKeyToDer(DsaKey* key, byte* output, word32 inLen);
     95 WOLFSSL_API int wc_SetDsaPublicKey(byte* output, DsaKey* key,
     96                                    int outLen, int with_header);
     97 WOLFSSL_API int wc_DsaKeyToPublicDer(DsaKey* key, byte* output, word32 inLen);
     98 
     99 #ifdef WOLFSSL_KEY_GEN
    100 WOLFSSL_API int wc_MakeDsaKey(WC_RNG *rng, DsaKey *dsa);
    101 WOLFSSL_API int wc_MakeDsaParameters(WC_RNG *rng, int modulus_size, DsaKey *dsa);
    102 #endif
    103 
    104 /* raw export functions */
    105 WOLFSSL_API int wc_DsaImportParamsRaw(DsaKey* dsa, const char* p,
    106                                       const char* q, const char* g);
    107 WOLFSSL_API int wc_DsaImportParamsRawCheck(DsaKey* dsa, const char* p,
    108                                       const char* q, const char* g,
    109                                       int trusted, WC_RNG* rng);
    110 WOLFSSL_API int wc_DsaExportParamsRaw(DsaKey* dsa, byte* p, word32* pSz,
    111                                       byte* q, word32* qSz, byte* g,
    112                                       word32* gSz);
    113 WOLFSSL_API int wc_DsaExportKeyRaw(DsaKey* dsa, byte* x, word32* xSz, byte* y,
    114                                    word32* ySz);
    115 #ifdef __cplusplus
    116     } /* extern "C" */
    117 #endif
    118 
    119 #endif /* NO_DSA */
    120 #endif /* WOLF_CRYPT_DSA_H */
    121