/* ---- NUMBER THEORY ---- */#ifdef MPI#include "tommath.h"/* in/out macros */#define OUTPUT_BIGNUM(num, out, y, z)                                                             \{                                                                                                 \      if ((y + 4) > *outlen) { return CRYPT_BUFFER_OVERFLOW; }                                    \      z = (unsigned long)mp_unsigned_bin_size(num);                                               \      STORE32L(z, out+y);                                                                         \      y += 4;                                                                                     \      if ((y + z) > *outlen) { return CRYPT_BUFFER_OVERFLOW; }                                    \      if ((err = mp_to_unsigned_bin(num, out+y)) != MP_OKAY) { return mpi_to_ltc_error(err); }    \      y += z;                                                                                     \}#define INPUT_BIGNUM(num, in, x, y)                              \{                                                                \     /* load value */                                            \     if ((y + 4) > inlen) {                                      \        err = CRYPT_INVALID_PACKET;                              \        goto error;                                              \     }                                                           \     LOAD32L(x, in+y);                                           \     y += 4;                                                     \                                                                 \     /* sanity check... */                                       \     if ((x+y) > inlen) {                                        \        err = CRYPT_INVALID_PACKET;                              \        goto error;                                              \     }                                                           \                                                                 \     /* load it */                                               \     if ((err = mp_read_unsigned_bin(num, (unsigned char *)in+y, (int)x)) != MP_OKAY) {\        err = mpi_to_ltc_error(err);                             \        goto error;                                              \     }                                                           \     y += x;                                                     \     if ((err = mp_shrink(num)) != MP_OKAY) {                    \        err = mpi_to_ltc_error(err);                             \        goto error;                                              \     }                                                           \}extern int is_prime(mp_int *, int *);extern int rand_prime(mp_int *N, long len, prng_state *prng, int wprng);extern mp_err mp_init_multi(mp_int* mp, ...);extern void mp_clear_multi(mp_int* mp, ...);#else   #ifdef MRSA      #error RSA requires the big int library    #endif   #ifdef MECC      #error ECC requires the big int library    #endif   #ifdef MDH      #error DH requires the big int library    #endif   #ifdef MDSA      #error DSA requires the big int library    #endif#endif /* MPI *//* ---- PUBLIC KEY CRYPTO ---- */#define PK_PRIVATE            0        /* PK private keys */#define PK_PUBLIC             1        /* PK public keys */#define PK_PRIVATE_OPTIMIZED  2        /* PK private key [rsa optimized] *//* ---- PACKET ---- */#ifdef PACKETextern void packet_store_header(unsigned char *dst, int section, int subsection);extern int packet_valid_header(unsigned char *src, int section, int subsection);#endif/* ---- RSA ---- */#ifdef MRSAtypedef struct Rsa_key {    int type;    mp_int e, d, N, qP, pQ, dP, dQ, p, q;} rsa_key;extern int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key);extern int rsa_exptmod(const unsigned char *in,  unsigned long inlen,                              unsigned char *out, unsigned long *outlen, int which,                              rsa_key *key);extern int rsa_pad(const unsigned char *in,  unsigned long inlen,                          unsigned char *out, unsigned long *outlen,                          int wprng, prng_state *prng);extern int rsa_signpad(const unsigned char *in,  unsigned long inlen,                              unsigned char *out, unsigned long *outlen);extern int rsa_depad(const unsigned char *in,  unsigned long inlen,                            unsigned char *out, unsigned long *outlen);extern int rsa_signdepad(const unsigned char *in,  unsigned long inlen,                               unsigned char *out, unsigned long *outlen);extern void rsa_free(rsa_key *key);extern int rsa_encrypt_key(const unsigned char *inkey, unsigned long inlen,                                 unsigned char *outkey, unsigned long *outlen,                                 prng_state *prng, int wprng, rsa_key *key);extern int rsa_decrypt_key(const unsigned char *in, unsigned long inlen,                                 unsigned char *outkey, unsigned long *keylen,                                  rsa_key *key);extern int rsa_sign_hash(const unsigned char *in,  unsigned long inlen,                                unsigned char *out, unsigned long *outlen,                                rsa_key *key);extern int rsa_verify_hash(const unsigned char *sig, unsigned long siglen,                           const unsigned char *hash, int *stat, rsa_key *key);extern int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key);extern int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key);#endif/* ---- DH Routines ---- */#ifdef MDH typedef struct Dh_key {    int idx, type;    mp_int x, y;} dh_key;extern int dh_test(void);extern void dh_sizes(int *low, int *high);extern int dh_get_size(dh_key *key);extern int dh_make_key(prng_state *prng, int wprng, int keysize, dh_key *key);extern void dh_free(dh_key *key);extern int dh_export(unsigned char *out, unsigned long *outlen, int type, dh_key *key);extern int dh_import(const unsigned char *in, unsigned long inlen, dh_key *key);extern int dh_shared_secret(dh_key *private_key, dh_key *public_key,                            unsigned char *out, unsigned long *outlen);extern int dh_encrypt_key(const unsigned char *inkey, unsigned long keylen,                                unsigned char *out,  unsigned long *len,                                 prng_state *prng, int wprng, int hash,                                 dh_key *key);extern int dh_decrypt_key(const unsigned char *in,  unsigned long inlen,                                 unsigned char *outkey, unsigned long *keylen,                                 dh_key *key);extern int dh_sign_hash(const unsigned char *in,  unsigned long inlen,                              unsigned char *out, unsigned long *outlen,                              prng_state *prng, int wprng, dh_key *key);extern int dh_verify_hash(const unsigned char *sig, unsigned long siglen,                          const unsigned char *hash, unsigned long hashlen,                                 int *stat, dh_key *key);#endif/* ---- ECC Routines ---- */#ifdef MECCtypedef struct {    mp_int x, y;} ecc_point;typedef struct {    int type, idx;    ecc_point pubkey;    mp_int k;} ecc_key;extern int ecc_test(void);extern void ecc_sizes(int *low, int *high);extern int ecc_get_size(ecc_key *key);extern int ecc_make_key(prng_state *prng, int wprng, int keysize, ecc_key *key);extern void ecc_free(ecc_key *key);extern int ecc_export(unsigned char *out, unsigned long *outlen, int type, ecc_key *key);extern int ecc_import(const unsigned char *in, unsigned long inlen, ecc_key *key);extern int ecc_shared_secret(ecc_key *private_key, ecc_key *public_key,                              unsigned char *out, unsigned long *outlen);extern int ecc_encrypt_key(const unsigned char *inkey, unsigned long keylen,                                 unsigned char *out,  unsigned long *len,                                  prng_state *prng, int wprng, int hash,                                  ecc_key *key);extern int ecc_decrypt_key(const unsigned char *in, unsigned long inlen,                                 unsigned char *outkey, unsigned long *keylen,                                  ecc_key *key);extern int ecc_sign_hash(const unsigned char *in,  unsigned long inlen,                               unsigned char *out, unsigned long *outlen,                               prng_state *prng, int wprng, ecc_key *key);extern int ecc_verify_hash(const unsigned char *sig,  unsigned long siglen,                           const unsigned char *hash, unsigned long hashlen,                                  int *stat, ecc_key *key);#endif#ifdef MDSAtypedef struct {   int type, qord;   mp_int g, q, p, x, y;} dsa_key;extern int dsa_make_key(prng_state *prng, int wprng, int group_size, int modulus_size, dsa_key *key);extern void dsa_free(dsa_key *key);extern int dsa_sign_hash(const unsigned char *in,  unsigned long inlen,                        unsigned char *out, unsigned long *outlen,                        prng_state *prng, int wprng, dsa_key *key);extern int dsa_verify_hash(const unsigned char *sig, unsigned long siglen,                           const unsigned char *hash, unsigned long inlen,                            int *stat, dsa_key *key);extern int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key);extern int dsa_export(unsigned char *out, unsigned long *outlen, int type, dsa_key *key);extern int dsa_verify_key(dsa_key *key, int *stat);#endif