448 lines
19 KiB
C
448 lines
19 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt.h"
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/*
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* Internal Macros
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*/
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#define LTC_PAD_MASK (0xF000U)
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/*
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* Internal Enums
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*/
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enum ltc_oid_id {
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PKA_RSA,
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PKA_DSA,
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PKA_EC,
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PKA_EC_PRIMEF,
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PKA_X25519,
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PKA_ED25519,
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};
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/*
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* Internal Types
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*/
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typedef struct {
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int size;
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const char *name, *base, *prime;
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} ltc_dh_set_type;
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typedef int (*fn_kdf_t)(const unsigned char *password, unsigned long password_len,
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const unsigned char *salt, unsigned long salt_len,
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int iteration_count, int hash_idx,
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unsigned char *out, unsigned long *outlen);
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typedef struct {
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/* KDF */
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fn_kdf_t kdf;
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/* Hash or HMAC */
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const char* h;
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/* cipher */
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const char* c;
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unsigned long keylen;
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/* not used for pbkdf2 */
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unsigned long blocklen;
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} pbes_properties;
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typedef struct
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{
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pbes_properties type;
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const void *pwd;
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unsigned long pwdlen;
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ltc_asn1_list *enc_data;
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ltc_asn1_list *salt;
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ltc_asn1_list *iv;
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unsigned long iterations;
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/* only used for RC2 */
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unsigned long key_bits;
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} pbes_arg;
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/*
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* Internal functions
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*/
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/* tomcrypt_cipher.h */
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void blowfish_enc(ulong32 *data, unsigned long blocks, const symmetric_key *skey);
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int blowfish_expand(const unsigned char *key, int keylen,
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const unsigned char *data, int datalen,
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symmetric_key *skey);
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int blowfish_setup_with_data(const unsigned char *key, int keylen,
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const unsigned char *data, int datalen,
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symmetric_key *skey);
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/* tomcrypt_hash.h */
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/* a simple macro for making hash "process" functions */
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#define HASH_PROCESS(func_name, compress_name, state_var, block_size) \
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int func_name (hash_state * md, const unsigned char *in, unsigned long inlen) \
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{ \
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unsigned long n; \
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int err; \
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LTC_ARGCHK(md != NULL); \
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LTC_ARGCHK(in != NULL); \
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if (md-> state_var .curlen > sizeof(md-> state_var .buf)) { \
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return CRYPT_INVALID_ARG; \
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} \
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if ((md-> state_var .length + inlen * 8) < md-> state_var .length) { \
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return CRYPT_HASH_OVERFLOW; \
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} \
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while (inlen > 0) { \
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if (md-> state_var .curlen == 0 && inlen >= block_size) { \
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if ((err = compress_name (md, in)) != CRYPT_OK) { \
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return err; \
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} \
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md-> state_var .length += block_size * 8; \
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in += block_size; \
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inlen -= block_size; \
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} else { \
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n = MIN(inlen, (block_size - md-> state_var .curlen)); \
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XMEMCPY(md-> state_var .buf + md-> state_var.curlen, in, (size_t)n); \
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md-> state_var .curlen += n; \
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in += n; \
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inlen -= n; \
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if (md-> state_var .curlen == block_size) { \
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if ((err = compress_name (md, md-> state_var .buf)) != CRYPT_OK) { \
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return err; \
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} \
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md-> state_var .length += 8*block_size; \
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md-> state_var .curlen = 0; \
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} \
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} \
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} \
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return CRYPT_OK; \
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}
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/* tomcrypt_mac.h */
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int ocb3_int_ntz(unsigned long x);
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void ocb3_int_xor_blocks(unsigned char *out, const unsigned char *block_a, const unsigned char *block_b, unsigned long block_len);
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/* tomcrypt_math.h */
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#if !defined(DESC_DEF_ONLY)
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#define MP_DIGIT_BIT ltc_mp.bits_per_digit
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/* some handy macros */
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#define mp_init(a) ltc_mp.init(a)
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#define mp_init_multi ltc_init_multi
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#define mp_clear(a) ltc_mp.deinit(a)
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#define mp_clear_multi ltc_deinit_multi
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#define mp_cleanup_multi ltc_cleanup_multi
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#define mp_init_copy(a, b) ltc_mp.init_copy(a, b)
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#define mp_neg(a, b) ltc_mp.neg(a, b)
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#define mp_copy(a, b) ltc_mp.copy(a, b)
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#define mp_set(a, b) ltc_mp.set_int(a, b)
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#define mp_set_int(a, b) ltc_mp.set_int(a, b)
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#define mp_get_int(a) ltc_mp.get_int(a)
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#define mp_get_digit(a, n) ltc_mp.get_digit(a, n)
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#define mp_get_digit_count(a) ltc_mp.get_digit_count(a)
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#define mp_cmp(a, b) ltc_mp.compare(a, b)
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#define mp_cmp_d(a, b) ltc_mp.compare_d(a, b)
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#define mp_count_bits(a) ltc_mp.count_bits(a)
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#define mp_cnt_lsb(a) ltc_mp.count_lsb_bits(a)
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#define mp_2expt(a, b) ltc_mp.twoexpt(a, b)
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#define mp_read_radix(a, b, c) ltc_mp.read_radix(a, b, c)
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#define mp_toradix(a, b, c) ltc_mp.write_radix(a, b, c)
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#define mp_unsigned_bin_size(a) ltc_mp.unsigned_size(a)
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#define mp_to_unsigned_bin(a, b) ltc_mp.unsigned_write(a, b)
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#define mp_read_unsigned_bin(a, b, c) ltc_mp.unsigned_read(a, b, c)
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#define mp_add(a, b, c) ltc_mp.add(a, b, c)
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#define mp_add_d(a, b, c) ltc_mp.addi(a, b, c)
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#define mp_sub(a, b, c) ltc_mp.sub(a, b, c)
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#define mp_sub_d(a, b, c) ltc_mp.subi(a, b, c)
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#define mp_mul(a, b, c) ltc_mp.mul(a, b, c)
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#define mp_mul_d(a, b, c) ltc_mp.muli(a, b, c)
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#define mp_sqr(a, b) ltc_mp.sqr(a, b)
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#define mp_sqrtmod_prime(a, b, c) ltc_mp.sqrtmod_prime(a, b, c)
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#define mp_div(a, b, c, d) ltc_mp.mpdiv(a, b, c, d)
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#define mp_div_2(a, b) ltc_mp.div_2(a, b)
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#define mp_mod(a, b, c) ltc_mp.mpdiv(a, b, NULL, c)
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#define mp_mod_d(a, b, c) ltc_mp.modi(a, b, c)
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#define mp_gcd(a, b, c) ltc_mp.gcd(a, b, c)
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#define mp_lcm(a, b, c) ltc_mp.lcm(a, b, c)
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#define mp_addmod(a, b, c, d) ltc_mp.addmod(a, b, c, d)
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#define mp_submod(a, b, c, d) ltc_mp.submod(a, b, c, d)
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#define mp_mulmod(a, b, c, d) ltc_mp.mulmod(a, b, c, d)
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#define mp_sqrmod(a, b, c) ltc_mp.sqrmod(a, b, c)
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#define mp_invmod(a, b, c) ltc_mp.invmod(a, b, c)
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#define mp_montgomery_setup(a, b) ltc_mp.montgomery_setup(a, b)
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#define mp_montgomery_normalization(a, b) ltc_mp.montgomery_normalization(a, b)
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#define mp_montgomery_reduce(a, b, c) ltc_mp.montgomery_reduce(a, b, c)
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#define mp_montgomery_free(a) ltc_mp.montgomery_deinit(a)
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#define mp_exptmod(a,b,c,d) ltc_mp.exptmod(a,b,c,d)
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#define mp_prime_is_prime(a, b, c) ltc_mp.isprime(a, b, c)
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#define mp_iszero(a) (mp_cmp_d(a, 0) == LTC_MP_EQ ? LTC_MP_YES : LTC_MP_NO)
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#define mp_isodd(a) (mp_get_digit_count(a) > 0 ? (mp_get_digit(a, 0) & 1 ? LTC_MP_YES : LTC_MP_NO) : LTC_MP_NO)
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#define mp_exch(a, b) do { void *ABC__tmp = a; a = b; b = ABC__tmp; } while(0)
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#define mp_tohex(a, b) mp_toradix(a, b, 16)
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#define mp_rand(a, b) ltc_mp.rand(a, b)
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#endif
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/* tomcrypt_misc.h */
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void copy_or_zeromem(const unsigned char* src, unsigned char* dest, unsigned long len, int coz);
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int pbes_decrypt(const pbes_arg *arg, unsigned char *dec_data, unsigned long *dec_size);
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int pbes1_extract(const ltc_asn1_list *s, pbes_arg *res);
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int pbes2_extract(const ltc_asn1_list *s, pbes_arg *res);
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/* tomcrypt_pk.h */
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int rand_bn_bits(void *N, int bits, prng_state *prng, int wprng);
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int rand_bn_upto(void *N, void *limit, prng_state *prng, int wprng);
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int pk_get_oid(enum ltc_oid_id id, const char **st);
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int pk_oid_str_to_num(const char *OID, unsigned long *oid, unsigned long *oidlen);
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int pk_oid_num_to_str(const unsigned long *oid, unsigned long oidlen, char *OID, unsigned long *outlen);
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/* ---- DH Routines ---- */
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#ifdef LTC_MRSA
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int rsa_init(rsa_key *key);
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void rsa_shrink_key(rsa_key *key);
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#endif /* LTC_MRSA */
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/* ---- DH Routines ---- */
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#ifdef LTC_MDH
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extern const ltc_dh_set_type ltc_dh_sets[];
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int dh_check_pubkey(const dh_key *key);
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#endif /* LTC_MDH */
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/* ---- ECC Routines ---- */
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#ifdef LTC_MECC
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int ecc_set_curve_from_mpis(void *a, void *b, void *prime, void *order, void *gx, void *gy, unsigned long cofactor, ecc_key *key);
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int ecc_copy_curve(const ecc_key *srckey, ecc_key *key);
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int ecc_set_curve_by_size(int size, ecc_key *key);
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int ecc_import_subject_public_key_info(const unsigned char *in, unsigned long inlen, ecc_key *key);
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#ifdef LTC_SSH
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int ecc_ssh_ecdsa_encode_name(char *buffer, unsigned long *buflen, const ecc_key *key);
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#endif
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/* low level functions */
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ecc_point *ltc_ecc_new_point(void);
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void ltc_ecc_del_point(ecc_point *p);
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int ltc_ecc_set_point_xyz(ltc_mp_digit x, ltc_mp_digit y, ltc_mp_digit z, ecc_point *p);
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int ltc_ecc_copy_point(const ecc_point *src, ecc_point *dst);
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int ltc_ecc_is_point(const ltc_ecc_dp *dp, void *x, void *y);
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int ltc_ecc_is_point_at_infinity(const ecc_point *P, void *modulus, int *retval);
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int ltc_ecc_import_point(const unsigned char *in, unsigned long inlen, void *prime, void *a, void *b, void *x, void *y);
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int ltc_ecc_export_point(unsigned char *out, unsigned long *outlen, void *x, void *y, unsigned long size, int compressed);
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int ltc_ecc_verify_key(const ecc_key *key);
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/* point ops (mp == montgomery digit) */
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#if !defined(LTC_MECC_ACCEL) || defined(LTM_DESC) || defined(GMP_DESC)
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/* R = 2P */
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int ltc_ecc_projective_dbl_point(const ecc_point *P, ecc_point *R, void *ma, void *modulus, void *mp);
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/* R = P + Q */
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int ltc_ecc_projective_add_point(const ecc_point *P, const ecc_point *Q, ecc_point *R, void *ma, void *modulus, void *mp);
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#endif
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#if defined(LTC_MECC_FP)
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/* optimized point multiplication using fixed point cache (HAC algorithm 14.117) */
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int ltc_ecc_fp_mulmod(void *k, ecc_point *G, ecc_point *R, void *a, void *modulus, int map);
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/* functions for saving/loading/freeing/adding to fixed point cache */
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int ltc_ecc_fp_save_state(unsigned char **out, unsigned long *outlen);
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int ltc_ecc_fp_restore_state(unsigned char *in, unsigned long inlen);
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void ltc_ecc_fp_free(void);
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int ltc_ecc_fp_add_point(ecc_point *g, void *modulus, int lock);
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/* lock/unlock all points currently in fixed point cache */
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void ltc_ecc_fp_tablelock(int lock);
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#endif
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/* R = kG */
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int ltc_ecc_mulmod(void *k, const ecc_point *G, ecc_point *R, void *a, void *modulus, int map);
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#ifdef LTC_ECC_SHAMIR
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/* kA*A + kB*B = C */
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int ltc_ecc_mul2add(const ecc_point *A, void *kA,
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const ecc_point *B, void *kB,
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ecc_point *C,
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void *ma,
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void *modulus);
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#ifdef LTC_MECC_FP
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/* Shamir's trick with optimized point multiplication using fixed point cache */
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int ltc_ecc_fp_mul2add(const ecc_point *A, void *kA,
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const ecc_point *B, void *kB,
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ecc_point *C,
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void *ma,
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void *modulus);
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#endif
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#endif
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/* map P to affine from projective */
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int ltc_ecc_map(ecc_point *P, void *modulus, void *mp);
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#endif /* LTC_MECC */
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#ifdef LTC_MDSA
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int dsa_int_validate_xy(const dsa_key *key, int *stat);
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int dsa_int_validate_pqg(const dsa_key *key, int *stat);
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int dsa_int_validate_primes(const dsa_key *key, int *stat);
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#endif /* LTC_MDSA */
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#ifdef LTC_CURVE25519
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int tweetnacl_crypto_sign(
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unsigned char *sm,unsigned long long *smlen,
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const unsigned char *m,unsigned long long mlen,
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const unsigned char *sk, const unsigned char *pk);
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int tweetnacl_crypto_sign_open(
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int *stat,
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unsigned char *m,unsigned long long *mlen,
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const unsigned char *sm,unsigned long long smlen,
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const unsigned char *pk);
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int tweetnacl_crypto_sign_keypair(prng_state *prng, int wprng, unsigned char *pk,unsigned char *sk);
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int tweetnacl_crypto_sk_to_pk(unsigned char *pk, const unsigned char *sk);
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int tweetnacl_crypto_scalarmult(unsigned char *q, const unsigned char *n, const unsigned char *p);
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int tweetnacl_crypto_scalarmult_base(unsigned char *q,const unsigned char *n);
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typedef int (*sk_to_pk)(unsigned char *pk ,const unsigned char *sk);
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int ec25519_import_pkcs8(const unsigned char *in, unsigned long inlen,
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const void *pwd, unsigned long pwdlen,
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enum ltc_oid_id id, sk_to_pk fp,
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curve25519_key *key);
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int ec25519_export( unsigned char *out, unsigned long *outlen,
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int which,
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const curve25519_key *key);
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#endif /* LTC_CURVE25519 */
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#ifdef LTC_DER
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#define LTC_ASN1_IS_TYPE(e, t) (((e) != NULL) && ((e)->type == (t)))
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/* DER handling */
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int der_decode_custom_type_ex(const unsigned char *in, unsigned long inlen,
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ltc_asn1_list *root,
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ltc_asn1_list *list, unsigned long outlen, unsigned int flags);
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int der_encode_asn1_identifier(const ltc_asn1_list *id, unsigned char *out, unsigned long *outlen);
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int der_decode_asn1_identifier(const unsigned char *in, unsigned long *inlen, ltc_asn1_list *id);
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int der_length_asn1_identifier(const ltc_asn1_list *id, unsigned long *idlen);
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int der_encode_asn1_length(unsigned long len, unsigned char* out, unsigned long* outlen);
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int der_decode_asn1_length(const unsigned char *in, unsigned long *inlen, unsigned long *outlen);
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int der_length_asn1_length(unsigned long len, unsigned long *outlen);
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int der_length_sequence_ex(const ltc_asn1_list *list, unsigned long inlen,
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unsigned long *outlen, unsigned long *payloadlen);
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extern const ltc_asn1_type der_asn1_tag_to_type_map[];
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extern const unsigned long der_asn1_tag_to_type_map_sz;
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extern const int der_asn1_type_to_identifier_map[];
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extern const unsigned long der_asn1_type_to_identifier_map_sz;
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int der_decode_sequence_multi_ex(const unsigned char *in, unsigned long inlen, unsigned int flags, ...);
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int der_teletex_char_encode(int c);
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int der_teletex_value_decode(int v);
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int der_utf8_valid_char(const wchar_t c);
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typedef int (*public_key_decode_cb)(const unsigned char *in, unsigned long inlen, void *ctx);
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int x509_decode_public_key_from_certificate(const unsigned char *in, unsigned long inlen,
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enum ltc_oid_id algorithm, ltc_asn1_type param_type,
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ltc_asn1_list* parameters, unsigned long *parameters_len,
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public_key_decode_cb callback, void *ctx);
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/* SUBJECT PUBLIC KEY INFO */
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int x509_encode_subject_public_key_info(unsigned char *out, unsigned long *outlen,
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unsigned int algorithm, const void* public_key, unsigned long public_key_len,
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ltc_asn1_type parameters_type, ltc_asn1_list* parameters, unsigned long parameters_len);
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int x509_decode_subject_public_key_info(const unsigned char *in, unsigned long inlen,
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unsigned int algorithm, void* public_key, unsigned long* public_key_len,
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ltc_asn1_type parameters_type, ltc_asn1_list* parameters, unsigned long *parameters_len);
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int pk_oid_cmp_with_ulong(const char *o1, const unsigned long *o2, unsigned long o2size);
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int pk_oid_cmp_with_asn1(const char *o1, const ltc_asn1_list *o2);
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#endif /* LTC_DER */
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/* tomcrypt_pkcs.h */
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#ifdef LTC_PKCS_8
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int pkcs8_decode_flexi(const unsigned char *in, unsigned long inlen,
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const void *pwd, unsigned long pwdlen,
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ltc_asn1_list **decoded_list);
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#endif /* LTC_PKCS_8 */
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#ifdef LTC_PKCS_12
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int pkcs12_utf8_to_utf16(const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen);
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|
|
|
int pkcs12_kdf( int hash_id,
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|
const unsigned char *pw, unsigned long pwlen,
|
|
const unsigned char *salt, unsigned long saltlen,
|
|
unsigned int iterations, unsigned char purpose,
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|
unsigned char *out, unsigned long outlen);
|
|
|
|
#endif /* LTC_PKCS_12 */
|
|
|
|
/* tomcrypt_prng.h */
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|
|
|
#define LTC_PRNG_EXPORT(which) \
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|
int which ## _export(unsigned char *out, unsigned long *outlen, prng_state *prng) \
|
|
{ \
|
|
unsigned long len = which ## _desc.export_size; \
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|
\
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|
LTC_ARGCHK(prng != NULL); \
|
|
LTC_ARGCHK(out != NULL); \
|
|
LTC_ARGCHK(outlen != NULL); \
|
|
\
|
|
if (*outlen < len) { \
|
|
*outlen = len; \
|
|
return CRYPT_BUFFER_OVERFLOW; \
|
|
} \
|
|
\
|
|
if (which ## _read(out, len, prng) != len) { \
|
|
return CRYPT_ERROR_READPRNG; \
|
|
} \
|
|
\
|
|
*outlen = len; \
|
|
return CRYPT_OK; \
|
|
}
|
|
|
|
/* extract a byte portably */
|
|
#ifdef _MSC_VER
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|
#define LTC_BYTE(x, n) ((unsigned char)((x) >> (8 * (n))))
|
|
#else
|
|
#define LTC_BYTE(x, n) (((x) >> (8 * (n))) & 255)
|
|
#endif
|