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#ifndef __CRYPTDSA_
#define __CRYPTDSA_
#ifdef __cplusplus
extern "C" {#endif
#define SHA_BITS 160
// Number of bits output by SHA
#define SHA_DWORDS 5
// Number of DWORDS output by SHA
#define DSA_Q_MINDWORDS 5
// Minimum number of DWORDS in q
#define DSA_Q_MAXDWORDS 128
// Maximum number of DWORDS in q
#define DSA_P_MINDWORDS 16
// Minimum number of DWORDS in p
#define DSA_P_MAXDWORDS 128
// Maximum number of DWORDS in p
#define DSA_Q_MAXDIGITS DWORDS_TO_DIGITS(DSA_Q_MAXDWORDS)
#define DSA_P_MAXDIGITS DWORDS_TO_DIGITS(DSA_P_MAXDWORDS)
typedef struct { void *pInfo; void *pFuncRNG; } RNGINFO;
typedef struct { DWORD nbitp; // Number of significant bits in p.
// (Multiple of 64, 512 <= nbitp <= 1024)
DWORD nbitq; // Number of significant bits in q.
// Must be exactly 160.
DWORD p[DSA_P_MAXDWORDS];// Public prime p, 512-1024 bits
DWORD q[DSA_Q_MAXDWORDS];// Public prime q (160 bits, divides p-1)
DWORD g[DSA_P_MAXDWORDS];// Public generator g of order q (mod p)
DWORD j[DSA_P_MAXDWORDS];// j = (p - 1) / q
DWORD y[DSA_P_MAXDWORDS];// Public value g^x (mod p), where x is private
DWORD S[SHA_DWORDS]; // 160-bit pattern used to construct q
DWORD C; // 12-bit value of C used to construct p
} dsa_public_t;
typedef struct { digit_t qdigit[DSA_Q_MAXDIGITS]; DWORD lngq_digits; // Length of q in digits
reciprocal_1_t qrecip; // Information about 1/q
digit_t gmodular[DSA_P_MAXDIGITS]; // g as residue mod p
digit_t ymodular[DSA_P_MAXDIGITS]; // y as residue mod p
mp_modulus_t pmodulus; // Constants mod p
} dsa_precomputed_t;
typedef struct { dsa_public_t pub; // Public data
DWORD x[DSA_P_MAXDWORDS];// Private exponent x (mod q)
dsa_precomputed_t precomputed; // Precomputed public data
} dsa_private_t;
typedef struct { DWORD r[SHA_DWORDS]; // (g^k mod p) mod q
DWORD s[SHA_DWORDS]; // (SHA(m) + x*r)/k mod q
} dsa_signature_t;
typedef struct { VOID *pOffload; // pointer to expo offload info
FARPROC pFuncExpoOffload; RNGINFO *pRNGInfo; // pointer to RNG info
} dsa_other_info;
typedef const dsa_precomputed_t dsa_precomputed_tc;typedef const dsa_private_t dsa_private_tc;typedef const dsa_public_t dsa_public_tc;typedef const dsa_signature_t dsa_signature_tc;
void DSA_gen_x(DWORDC cXDigits, // In
DWORDC cXDwords, // In
digit_t *pMod, // In
dsa_other_info *pOtherInfo, // In
DWORD *pdwX, // Out
digit_t *pXDigit); // Out
BOOL DSA_gen_x_and_y(BOOL fUseQ, // In
dsa_other_info *pOtherInfo, // In
dsa_private_t *privkey); // Out
BOOL DSA_check_g(DWORDC lngp_digits, // In
digit_tc *pGModular, // In
mp_modulus_t *pPModulo, // In
DWORDC lngq_digits, // In
digit_tc *pQDigit); // In
BOOL DSA_key_generation(DWORDC nbitp, // In
DWORDC nbitq, // In
dsa_other_info *pOtherInfo, // In
dsa_private_t *privkey); // Out
BOOL DSA_key_import_fillin(dsa_private_t *privkey); // In, Out
BOOL DSA_precompute_pgy(dsa_public_tc *pubkey, // In
dsa_precomputed_t *precomputed); // Out
BOOL DSA_precompute(dsa_public_tc *pubkey, // In
dsa_precomputed_t *precomputed, // Out
const BOOL checkSC); // In
BOOL DSA_sign(DWORDC message_hash[SHA_DWORDS], /* TBD */ dsa_private_tc *privkey, dsa_signature_t *signature, dsa_other_info *pOtherInfo);
BOOL DSA_signature_verification(DWORDC message_hash[SHA_DWORDS], dsa_public_tc *pubkey, dsa_precomputed_tc *precomputed_argument, dsa_signature_tc *signature, dsa_other_info *pOtherInfo);
BOOL DSA_parameter_verification( dsa_public_tc *pPubkey, dsa_precomputed_tc *pPrecomputed );
BOOL DSA_verify_j( dsa_public_tc *pPubkey, dsa_precomputed_tc *pPrecomputed );
#ifdef __cplusplus
}#endif
#endif __CRYPTDSA_
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