/* PKCS Header Info *//* ===> PKCS #1 -- RSA Cryptography <=== */#ifdef PKCS_1int pkcs_1_mgf1(const unsigned char *seed, unsigned long seedlen,                      int            hash_idx,                      unsigned char *mask, unsigned long masklen);int pkcs_1_i2osp(mp_int *n, unsigned long modulus_len, unsigned char *out);int pkcs_1_os2ip(mp_int *n, unsigned char *in, unsigned long inlen);/* *** v2.0 padding */int pkcs_1_oaep_encode(const unsigned char *msg,    unsigned long msglen,                       const unsigned char *lparam, unsigned long lparamlen,                             unsigned long modulus_bitlen, prng_state *prng,                             int           prng_idx,         int  hash_idx,                             unsigned char *out,    unsigned long *outlen);int pkcs_1_oaep_decode(const unsigned char *msg,    unsigned long msglen,                       const unsigned char *lparam, unsigned long lparamlen,                             unsigned long modulus_bitlen, int hash_idx,                             unsigned char *out,    unsigned long *outlen,                             int           *res);int pkcs_1_pss_encode(const unsigned char *msghash, unsigned long msghashlen,                            unsigned long saltlen,  prng_state   *prng,                                 int           prng_idx, int           hash_idx,                            unsigned long modulus_bitlen,                            unsigned char *out,     unsigned long *outlen);int pkcs_1_pss_decode(const unsigned char *msghash, unsigned long msghashlen,                      const unsigned char *sig,     unsigned long siglen,                            unsigned long saltlen,  int           hash_idx,                            unsigned long modulus_bitlen, int    *res);/* *** v1.5 padding *//* encryption padding */int pkcs_1_v15_es_encode(const unsigned char *msg,    unsigned long msglen,                               unsigned long  modulus_bitlen,                                prng_state    *prng,   int           prng_idx,                               unsigned char *out,    unsigned long *outlen);/* note "outlen" is fixed, you have to tell this decoder how big * the original message was.  Unlike the OAEP decoder it cannot auto-detect it. */int pkcs_1_v15_es_decode(const unsigned char *msg,  unsigned long msglen,                               unsigned long modulus_bitlen,                               unsigned char *out,  unsigned long outlen,                               int           *res);/* signature padding */int pkcs_1_v15_sa_encode(const unsigned char *msghash,  unsigned long msghashlen,                               int            hash_idx, unsigned long modulus_bitlen,                               unsigned char *out,      unsigned long *outlen);int pkcs_1_v15_sa_decode(const unsigned char *msghash, unsigned long msghashlen,                         const unsigned char *sig,     unsigned long siglen,                               int           hash_idx, unsigned long modulus_bitlen,                                int          *res);#endif /* PKCS_1 *//* ===> PKCS #5 -- Password Based Cryptography <=== */#ifdef PKCS_5/* Algorithm #1 (old) */int pkcs_5_alg1(const unsigned char *password, unsigned long password_len,                 const unsigned char *salt,                 int iteration_count,  int hash_idx,                unsigned char *out,   unsigned long *outlen);/* Algorithm #2 (new) */int pkcs_5_alg2(const unsigned char *password, unsigned long password_len,                 const unsigned char *salt,     unsigned long salt_len,                int iteration_count,           int hash_idx,                unsigned char *out,            unsigned long *outlen);#endif  /* PKCS_5 */