279 lines
11 KiB
C
279 lines
11 KiB
C
/* ---- NUMBER THEORY ---- */
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#ifdef MPI
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#include "ltc_tommath.h"
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/* in/out macros */
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#define OUTPUT_BIGNUM(num, out, y, z) \
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{ \
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if ((y + 4) > *outlen) { return CRYPT_BUFFER_OVERFLOW; } \
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z = (unsigned long)mp_unsigned_bin_size(num); \
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STORE32L(z, out+y); \
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y += 4; \
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if ((y + z) > *outlen) { return CRYPT_BUFFER_OVERFLOW; } \
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if ((err = mp_to_unsigned_bin(num, out+y)) != MP_OKAY) { return mpi_to_ltc_error(err); } \
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y += z; \
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}
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#define INPUT_BIGNUM(num, in, x, y, inlen) \
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{ \
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/* load value */ \
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if ((y + 4) > inlen) { \
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err = CRYPT_INVALID_PACKET; \
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goto error; \
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} \
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LOAD32L(x, in+y); \
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y += 4; \
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\
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/* sanity check... */ \
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if ((x+y) > inlen) { \
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err = CRYPT_INVALID_PACKET; \
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goto error; \
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} \
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\
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/* load it */ \
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if ((err = mp_read_unsigned_bin(num, (unsigned char *)in+y, (int)x)) != MP_OKAY) {\
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err = mpi_to_ltc_error(err); \
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goto error; \
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} \
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y += x; \
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if ((err = mp_shrink(num)) != MP_OKAY) { \
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err = mpi_to_ltc_error(err); \
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goto error; \
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} \
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}
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int is_prime(mp_int *, int *);
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int rand_prime(mp_int *N, long len, prng_state *prng, int wprng);
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#else
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#ifdef MRSA
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#error RSA requires the big int library
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#endif
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#ifdef MECC
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#error ECC requires the big int library
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#endif
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#ifdef MDH
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#error DH requires the big int library
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#endif
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#ifdef MDSA
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#error DSA requires the big int library
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#endif
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#endif /* MPI */
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/* ---- PUBLIC KEY CRYPTO ---- */
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#define PK_PRIVATE 0 /* PK private keys */
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#define PK_PUBLIC 1 /* PK public keys */
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#define PK_PRIVATE_OPTIMIZED 2 /* PK private key [rsa optimized] */
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/* ---- PACKET ---- */
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#ifdef PACKET
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void packet_store_header(unsigned char *dst, int section, int subsection);
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int packet_valid_header(unsigned char *src, int section, int subsection);
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#endif
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/* ---- RSA ---- */
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#ifdef MRSA
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/* Min and Max RSA key sizes (in bits) */
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#define MIN_RSA_SIZE 1024
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#define MAX_RSA_SIZE 4096
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/* Stack required for temps (plus padding) */
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// #define RSA_STACK (8 + (MAX_RSA_SIZE/8))
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typedef struct Rsa_key {
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int type;
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mp_int e, d, N, qP, pQ, dP, dQ, p, q;
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} rsa_key;
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int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key);
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int rsa_exptmod(const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen, int which,
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prng_state *prng, int prng_idx,
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rsa_key *key);
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#ifdef RSA_TIMING
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int tim_exptmod(prng_state *prng, int prng_idx,
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mp_int *c, mp_int *e, mp_int *d, mp_int *n, mp_int *m);
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#else
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#define tim_exptmod(prng, prng_idx, c, e, d, n, m) mpi_to_ltc_error(mp_exptmod(c, d, n, m))
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#endif
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void rsa_free(rsa_key *key);
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/* These use PKCS #1 v2.0 padding */
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int rsa_encrypt_key(const unsigned char *inkey, unsigned long inlen,
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unsigned char *outkey, unsigned long *outlen,
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const unsigned char *lparam, unsigned long lparamlen,
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prng_state *prng, int prng_idx, int hash_idx, rsa_key *key);
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int rsa_decrypt_key(const unsigned char *in, unsigned long inlen,
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unsigned char *outkey, unsigned long *keylen,
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const unsigned char *lparam, unsigned long lparamlen,
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prng_state *prng, int prng_idx,
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int hash_idx, int *res,
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rsa_key *key);
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int rsa_sign_hash(const unsigned char *msghash, unsigned long msghashlen,
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unsigned char *sig, unsigned long *siglen,
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prng_state *prng, int prng_idx,
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int hash_idx, unsigned long saltlen,
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rsa_key *key);
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int rsa_verify_hash(const unsigned char *sig, unsigned long siglen,
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const unsigned char *msghash, unsigned long msghashlen,
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prng_state *prng, int prng_idx,
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int hash_idx, unsigned long saltlen,
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int *stat, rsa_key *key);
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/* these use PKCS #1 v1.5 padding */
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int rsa_v15_encrypt_key(const unsigned char *inkey, unsigned long inlen,
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unsigned char *outkey, unsigned long *outlen,
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prng_state *prng, int prng_idx,
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rsa_key *key);
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int rsa_v15_decrypt_key(const unsigned char *in, unsigned long inlen,
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unsigned char *outkey, unsigned long keylen,
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prng_state *prng, int prng_idx,
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int *res, rsa_key *key);
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int rsa_v15_sign_hash(const unsigned char *msghash, unsigned long msghashlen,
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unsigned char *sig, unsigned long *siglen,
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prng_state *prng, int prng_idx,
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int hash_idx, rsa_key *key);
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int rsa_v15_verify_hash(const unsigned char *sig, unsigned long siglen,
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const unsigned char *msghash, unsigned long msghashlen,
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prng_state *prng, int prng_idx,
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int hash_idx, int *stat,
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rsa_key *key);
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/* PKCS #1 import/export */
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int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key);
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int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key);
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#endif
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/* ---- DH Routines ---- */
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#ifdef MDH
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typedef struct Dh_key {
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int idx, type;
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mp_int x, y;
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} dh_key;
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int dh_test(void);
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void dh_sizes(int *low, int *high);
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int dh_get_size(dh_key *key);
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int dh_make_key(prng_state *prng, int wprng, int keysize, dh_key *key);
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void dh_free(dh_key *key);
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int dh_export(unsigned char *out, unsigned long *outlen, int type, dh_key *key);
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int dh_import(const unsigned char *in, unsigned long inlen, dh_key *key);
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int dh_shared_secret(dh_key *private_key, dh_key *public_key,
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unsigned char *out, unsigned long *outlen);
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int dh_encrypt_key(const unsigned char *inkey, unsigned long keylen,
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unsigned char *out, unsigned long *len,
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prng_state *prng, int wprng, int hash,
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dh_key *key);
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int dh_decrypt_key(const unsigned char *in, unsigned long inlen,
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unsigned char *outkey, unsigned long *keylen,
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dh_key *key);
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int dh_sign_hash(const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen,
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prng_state *prng, int wprng, dh_key *key);
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int dh_verify_hash(const unsigned char *sig, unsigned long siglen,
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const unsigned char *hash, unsigned long hashlen,
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int *stat, dh_key *key);
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#endif
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/* ---- ECC Routines ---- */
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#ifdef MECC
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typedef struct {
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mp_int x, y;
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} ecc_point;
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typedef struct {
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int type, idx;
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ecc_point pubkey;
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mp_int k;
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} ecc_key;
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int ecc_test(void);
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void ecc_sizes(int *low, int *high);
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int ecc_get_size(ecc_key *key);
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int ecc_make_key(prng_state *prng, int wprng, int keysize, ecc_key *key);
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void ecc_free(ecc_key *key);
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int ecc_export(unsigned char *out, unsigned long *outlen, int type, ecc_key *key);
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int ecc_import(const unsigned char *in, unsigned long inlen, ecc_key *key);
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int ecc_shared_secret(ecc_key *private_key, ecc_key *public_key,
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unsigned char *out, unsigned long *outlen);
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int ecc_encrypt_key(const unsigned char *inkey, unsigned long keylen,
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unsigned char *out, unsigned long *len,
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prng_state *prng, int wprng, int hash,
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ecc_key *key);
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int ecc_decrypt_key(const unsigned char *in, unsigned long inlen,
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unsigned char *outkey, unsigned long *keylen,
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ecc_key *key);
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int ecc_sign_hash(const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen,
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prng_state *prng, int wprng, ecc_key *key);
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int ecc_verify_hash(const unsigned char *sig, unsigned long siglen,
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const unsigned char *hash, unsigned long hashlen,
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int *stat, ecc_key *key);
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#endif
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#ifdef MDSA
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typedef struct {
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int type, qord;
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mp_int g, q, p, x, y;
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} dsa_key;
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int dsa_make_key(prng_state *prng, int wprng, int group_size, int modulus_size, dsa_key *key);
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void dsa_free(dsa_key *key);
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int dsa_sign_hash(const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen,
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prng_state *prng, int wprng, dsa_key *key);
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int dsa_verify_hash(const unsigned char *sig, unsigned long siglen,
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const unsigned char *hash, unsigned long inlen,
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int *stat, dsa_key *key);
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int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key);
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int dsa_export(unsigned char *out, unsigned long *outlen, int type, dsa_key *key);
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int dsa_verify_key(dsa_key *key, int *stat);
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#endif
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