tomcrypt_pk.h

AES加密算法对socket通信过程进行加密传输

/* ---- NUMBER THEORY ---- */

enum {
   PK_PUBLIC=0,
   PK_PRIVATE=1
};

int rand_prime(void *N, long len, prng_state *prng, int wprng);

/* ---- RSA ---- */
#ifdef LTC_MRSA

/* Min and Max RSA key sizes (in bits) */
#define MIN_RSA_SIZE 1024
#define MAX_RSA_SIZE 4096

/** RSA LTC_PKCS style key */
typedef struct Rsa_key {
    /** Type of key, PK_PRIVATE or PK_PUBLIC */
    int type;
    /** The public exponent */
    void *e; 
    /** The private exponent */
    void *d; 
    /** The modulus */
    void *N; 
    /** The p factor of N */
    void *p; 
    /** The q factor of N */
    void *q; 
    /** The 1/q mod p CRT param */
    void *qP; 
    /** The d mod (p - 1) CRT param */
    void *dP; 
    /** The d mod (q - 1) CRT param */
    void *dQ;
} rsa_key;

int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key);

int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
                      unsigned char *out,  unsigned long *outlen, int which,
                      rsa_key *key);

void rsa_free(rsa_key *key);

/* These use LTC_PKCS #1 v2.0 padding */
#define rsa_encrypt_key(_in, _inlen, _out, _outlen, _lparam, _lparamlen, _prng, _prng_idx, _hash_idx, _key) \
  rsa_encrypt_key_ex(_in, _inlen, _out, _outlen, _lparam, _lparamlen, _prng, _prng_idx, _hash_idx, LTC_LTC_PKCS_1_OAEP, _key)

#define rsa_decrypt_key(_in, _inlen, _out, _outlen, _lparam, _lparamlen, _hash_idx, _stat, _key) \
  rsa_decrypt_key_ex(_in, _inlen, _out, _outlen, _lparam, _lparamlen, _hash_idx, LTC_LTC_PKCS_1_OAEP, _stat, _key)

#define rsa_sign_hash(_in, _inlen, _out, _outlen, _prng, _prng_idx, _hash_idx, _saltlen, _key) \
  rsa_sign_hash_ex(_in, _inlen, _out, _outlen, LTC_LTC_PKCS_1_PSS, _prng, _prng_idx, _hash_idx, _saltlen, _key)

#define rsa_verify_hash(_sig, _siglen, _hash, _hashlen, _hash_idx, _saltlen, _stat, _key) \
  rsa_verify_hash_ex(_sig, _siglen, _hash, _hashlen, LTC_LTC_PKCS_1_PSS, _hash_idx, _saltlen, _stat, _key)

/* These can be switched between LTC_PKCS #1 v2.x and LTC_PKCS #1 v1.5 paddings */
int rsa_encrypt_key_ex(const unsigned char *in,     unsigned long inlen,
                             unsigned char *out,    unsigned long *outlen,
                       const unsigned char *lparam, unsigned long lparamlen,
                       prng_state *prng, int prng_idx, int hash_idx, int padding, rsa_key *key);

int rsa_decrypt_key_ex(const unsigned char *in,       unsigned long  inlen,
                             unsigned char *out,      unsigned long *outlen,
                       const unsigned char *lparam,   unsigned long  lparamlen,
                             int            hash_idx, int            padding,
                             int           *stat,     rsa_key       *key);

int rsa_sign_hash_ex(const unsigned char *in,       unsigned long  inlen,
                           unsigned char *out,      unsigned long *outlen,
                           int            padding,
                           prng_state    *prng,     int            prng_idx,
                           int            hash_idx, unsigned long  saltlen,
                           rsa_key *key);

int rsa_verify_hash_ex(const unsigned char *sig,      unsigned long siglen,
                       const unsigned char *hash,     unsigned long hashlen,
                             int            padding,
                             int            hash_idx, unsigned long saltlen,
                             int           *stat,     rsa_key      *key);

/* LTC_PKCS #1 import/export */
int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key);
int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key);
                        
#endif

/* ---- Katja ---- */
#ifdef MKAT

/* Min and Max KAT key sizes (in bits) */
#define MIN_KAT_SIZE 1024
#define MAX_KAT_SIZE 4096

/** Katja LTC_PKCS style key */
typedef struct KAT_key {
    /** Type of key, PK_PRIVATE or PK_PUBLIC */
    int type;
    /** The private exponent */
    void *d; 
    /** The modulus */
    void *N; 
    /** The p factor of N */
    void *p; 
    /** The q factor of N */
    void *q; 
    /** The 1/q mod p CRT param */
    void *qP; 
    /** The d mod (p - 1) CRT param */
    void *dP; 
    /** The d mod (q - 1) CRT param */
    void *dQ;
    /** The pq param */
    void *pq;
} katja_key;

int katja_make_key(prng_state *prng, int wprng, int size, katja_key *key);

int katja_exptmod(const unsigned char *in,   unsigned long inlen,
                        unsigned char *out,  unsigned long *outlen, int which,
                        katja_key *key);

void katja_free(katja_key *key);

/* These use LTC_PKCS #1 v2.0 padding */
int katja_encrypt_key(const unsigned char *in,     unsigned long inlen,
                            unsigned char *out,    unsigned long *outlen,
                      const unsigned char *lparam, unsigned long lparamlen,
                      prng_state *prng, int prng_idx, int hash_idx, katja_key *key);
                                        
int katja_decrypt_key(const unsigned char *in,       unsigned long inlen,
                            unsigned char *out,      unsigned long *outlen, 
                      const unsigned char *lparam,   unsigned long lparamlen,
                            int            hash_idx, int *stat,
                            katja_key       *key);

/* LTC_PKCS #1 import/export */
int katja_export(unsigned char *out, unsigned long *outlen, int type, katja_key *key);
int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key);
                        
#endif

/* ---- ECC Routines ---- */
#ifdef LTC_MECC

/* size of our temp buffers for exported keys */
#define ECC_BUF_SIZE 256

/* max private key size */
#define ECC_MAXSIZE  66

/** Structure defines a NIST GF(p) curve */
typedef struct {
   /** The size of the curve in octets */
   int size;

   /** name of curve */
   char *name; 

   /** The prime that defines the field the curve is in (encoded in hex) */
   char *prime;

   /** The fields B param (hex) */
   char *B;

   /** The order of the curve (hex) */
   char *order;
  
   /** The x co-ordinate of the base point on the curve (hex) */
   char *Gx;
 
   /** The y co-ordinate of the base point on the curve (hex) */
   char *Gy;
} ltc_ecc_set_type;

/** A point on a ECC curve, stored in Jacbobian format such that (x,y,z) => (x/z^2, y/z^3, 1) when interpretted as affine */
typedef struct {
    /** The x co-ordinate */
    void *x;

    /** The y co-ordinate */
    void *y;

    /** The z co-ordinate */
    void *z;
} ecc_point;

/** An ECC key */
typedef struct {
    /** Type of key, PK_PRIVATE or PK_PUBLIC */
    int type;

    /** Index into the ltc_ecc_sets[] for the parameters of this curve; if -1, then this key is using user supplied curve in dp */
    int idx;

	/** pointer to domain parameters; either points to NIST curves (identified by idx >= 0) or user supplied curve */
	const ltc_ecc_set_type *dp;

    /** The public key */
    ecc_point pubkey;

    /** The private key */
    void *k;
} ecc_key;

/** the ECC params provided */
extern const ltc_ecc_set_type ltc_ecc_sets[];

int  ecc_test(void);
void ecc_sizes(int *low, int *high);
int  ecc_get_size(ecc_key *key);

int  ecc_make_key(prng_state *prng, int wprng, int keysize, ecc_key *key);
int  ecc_make_key_ex(prng_state *prng, int wprng, ecc_key *key, const ltc_ecc_set_type *dp);
void ecc_free(ecc_key *key);

int  ecc_export(unsigned char *out, unsigned long *outlen, int type, ecc_key *key);
int  ecc_import(const unsigned char *in, unsigned long inlen, ecc_key *key);
int  ecc_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, const ltc_ecc_set_type *dp);

int ecc_ansi_x963_export(ecc_key *key, unsigned char *out, unsigned long *outlen);
int ecc_ansi_x963_import(const unsigned char *in, unsigned long inlen, ecc_key *key);
int ecc_ansi_x963_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, ltc_ecc_set_type *dp);

int  ecc_shared_secret(ecc_key *private_key, ecc_key *public_key, 
                       unsigned char *out, unsigned long *outlen);

int  ecc_encrypt_key(const unsigned char *in,   unsigned long inlen,
                           unsigned char *out,  unsigned long *outlen, 
                           prng_state *prng, int wprng, int hash, 
                           ecc_key *key);

int  ecc_decrypt_key(const unsigned char *in,  unsigned long  inlen,
                           unsigned char *out, unsigned long *outlen, 
                           ecc_key *key);

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);

int  ecc_verify_hash(const unsigned char *sig,  unsigned long siglen,
                     const unsigned char *hash, unsigned long hashlen, 
                     int *stat, ecc_key *key);

/* low level functions */
ecc_point *ltc_ecc_new_point(void);
void       ltc_ecc_del_point(ecc_point *p);
int        ltc_ecc_is_valid_idx(int n);

/* point ops (mp == montgomery digit) */
#if !defined(LTC_MECC_ACCEL) || defined(LTM_LTC_DESC) || defined(GMP_LTC_DESC)
/* R = 2P */
int ltc_ecc_projective_dbl_point(ecc_point *P, ecc_point *R, void *modulus, void *mp);

/* R = P + Q */
int ltc_ecc_projective_add_point(ecc_point *P, ecc_point *Q, ecc_point *R, void *modulus, void *mp);
#endif

#if defined(LTC_MECC_FP)
/* optimized point multiplication using fixed point cache (HAC algorithm 14.117) */
int ltc_ecc_fp_mulmod(void *k, ecc_point *G, ecc_point *R, void *modulus, int map);

/* functions for saving/loading/freeing/adding to fixed point cache */
int ltc_ecc_fp_save_state(unsigned char **out, unsigned long *outlen);
int ltc_ecc_fp_restore_state(unsigned char *in, unsigned long inlen);
void ltc_ecc_fp_free(void);
int ltc_ecc_fp_add_point(ecc_point *g, void *modulus, int lock);

/* lock/unlock all points currently in fixed point cache */
void ltc_ecc_fp_tablelock(int lock);
#endif

/* R = kG */
int ltc_ecc_mulmod(void *k, ecc_point *G, ecc_point *R, void *modulus, int map);