nihilist/tor
1
0
Fork 0
mirror of https://gitlab.torproject.org/tpo/core/tor.git synced 2024-11-14 07:03:44 +01:00
Code Issues Packages Projects Releases Wiki Activity
f755f9b9e6
tor/src/common/crypto.h
David Goulet 5dea4b565f Add a BASE32_DIGEST_LEN define 
Use this value instead of hardcoded values of 32 everywhere. This also
addresses the use of REND_DESC_ID_V2_LEN_BASE32 in
hs_lookup_last_hid_serv_request() for the HSDir encoded identity digest length
which is accurate but semantically wrong.

Fixes #23305.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-19 12:33:04 -04:00

361 lines
15 KiB
C
Raw Blame History

/* Copyright (c) 2001, Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2017, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file crypto.h
*
* \brief Headers for crypto.c
**/
#ifndef TOR_CRYPTO_H
#define TOR_CRYPTO_H
#include "orconfig.h"
#include <stdio.h>
#include "torint.h"
#include "testsupport.h"
#include "compat.h"
#include <openssl/engine.h>
#include "keccak-tiny/keccak-tiny.h"
/*
Macro to create an arbitrary OpenSSL version number as used by
OPENSSL_VERSION_NUMBER or SSLeay(), since the actual numbers are a bit hard
to read.
Don't use this directly, instead use one of the other OPENSSL_V macros
below.
The format is: 4 bits major, 8 bits minor, 8 bits fix, 8 bits patch, 4 bit
status.
*/
#define OPENSSL_VER(a,b,c,d,e) \
(((a)<<28) | \
((b)<<20) | \
((c)<<12) | \
((d)<< 4) | \
(e))
/** An openssl release number. For example, OPENSSL_V(0,9,8,'j') is the
* version for the released version of 0.9.8j */
#define OPENSSL_V(a,b,c,d) \
OPENSSL_VER((a),(b),(c),(d)-'a'+1,0xf)
/** An openssl release number for the first release in the series. For
* example, OPENSSL_V_NOPATCH(1,0,0) is the first released version of OpenSSL
* 1.0.0. */
#define OPENSSL_V_NOPATCH(a,b,c) \
OPENSSL_VER((a),(b),(c),0,0xf)
/** The first version that would occur for any alpha or beta in an openssl
* series. For example, OPENSSL_V_SERIES(0,9,8) is greater than any released
* 0.9.7, and less than any released 0.9.8. */
#define OPENSSL_V_SERIES(a,b,c) \
OPENSSL_VER((a),(b),(c),0,0)
/** Length of the output of our message digest. */
#define DIGEST_LEN 20
/** Length of the output of our second (improved) message digests. (For now
* this is just sha256, but it could be any other 256-bit digest.) */
#define DIGEST256_LEN 32
/** Length of the output of our 64-bit optimized message digests (SHA512). */
#define DIGEST512_LEN 64
/** Length of our symmetric cipher's keys of 128-bit. */
#define CIPHER_KEY_LEN 16
/** Length of our symmetric cipher's IV of 128-bit. */
#define CIPHER_IV_LEN 16
/** Length of our symmetric cipher's keys of 256-bit. */
#define CIPHER256_KEY_LEN 32
/** Length of our public keys. */
#define PK_BYTES (1024/8)
/** Length of our DH keys. */
#define DH_BYTES (1024/8)
/** Length of a sha1 message digest when encoded in base32 with trailing =
* signs removed. */
#define BASE32_DIGEST_LEN 32
/** Length of a sha1 message digest when encoded in base64 with trailing =
* signs removed. */
#define BASE64_DIGEST_LEN 27
/** Length of a sha256 message digest when encoded in base64 with trailing =
* signs removed. */
#define BASE64_DIGEST256_LEN 43
/** Length of a sha512 message digest when encoded in base64 with trailing =
* signs removed. */
#define BASE64_DIGEST512_LEN 86
/** Constant used to indicate OAEP padding for public-key encryption */
#define PK_PKCS1_OAEP_PADDING 60002
/** Number of bytes added for PKCS1-OAEP padding. */
#define PKCS1_OAEP_PADDING_OVERHEAD 42
/** Length of encoded public key fingerprints, including space; but not
* including terminating NUL. */
#define FINGERPRINT_LEN 49
/** Length of hex encoding of SHA1 digest, not including final NUL. */
#define HEX_DIGEST_LEN 40
/** Length of hex encoding of SHA256 digest, not including final NUL. */
#define HEX_DIGEST256_LEN 64
/** Length of hex encoding of SHA512 digest, not including final NUL. */
#define HEX_DIGEST512_LEN 128
typedef enum {
DIGEST_SHA1 = 0,
DIGEST_SHA256 = 1,
DIGEST_SHA512 = 2,
DIGEST_SHA3_256 = 3,
DIGEST_SHA3_512 = 4,
} digest_algorithm_t;
#define N_DIGEST_ALGORITHMS (DIGEST_SHA3_512+1)
#define N_COMMON_DIGEST_ALGORITHMS (DIGEST_SHA256+1)
/** A set of all the digests we commonly compute, taken on a single
* string. Any digests that are shorter than 512 bits are right-padded
* with 0 bits.
*
* Note that this representation wastes 44 bytes for the SHA1 case, so
* don't use it for anything where we need to allocate a whole bunch at
* once.
**/
typedef struct {
char d[N_COMMON_DIGEST_ALGORITHMS][DIGEST256_LEN];
} common_digests_t;
typedef struct crypto_pk_t crypto_pk_t;
typedef struct aes_cnt_cipher crypto_cipher_t;
typedef struct crypto_digest_t crypto_digest_t;
typedef struct crypto_xof_t crypto_xof_t;
typedef struct crypto_dh_t crypto_dh_t;
/* global state */
const char * crypto_openssl_get_version_str(void);
const char * crypto_openssl_get_header_version_str(void);
int crypto_early_init(void) ATTR_WUR;
int crypto_global_init(int hardwareAccel,
const char *accelName,
const char *accelPath) ATTR_WUR;
#ifdef USE_DMALLOC
int crypto_use_tor_alloc_functions(void);
#endif
void crypto_thread_cleanup(void);
int crypto_global_cleanup(void);
/* environment setup */
MOCK_DECL(crypto_pk_t *,crypto_pk_new,(void));
void crypto_pk_free(crypto_pk_t *env);
void crypto_set_tls_dh_prime(void);
crypto_cipher_t *crypto_cipher_new(const char *key);
crypto_cipher_t *crypto_cipher_new_with_bits(const char *key, int bits);
crypto_cipher_t *crypto_cipher_new_with_iv(const char *key, const char *iv);
crypto_cipher_t *crypto_cipher_new_with_iv_and_bits(const uint8_t *key,
const uint8_t *iv,
int bits);
void crypto_cipher_free(crypto_cipher_t *env);
/* public key crypto */
MOCK_DECL(int, crypto_pk_generate_key_with_bits,(crypto_pk_t *env, int bits));
#define crypto_pk_generate_key(env) \
crypto_pk_generate_key_with_bits((env), (PK_BYTES*8))
int crypto_pk_read_private_key_from_filename(crypto_pk_t *env,
const char *keyfile);
int crypto_pk_write_public_key_to_string(crypto_pk_t *env,
char **dest, size_t *len);
int crypto_pk_write_private_key_to_string(crypto_pk_t *env,
char **dest, size_t *len);
int crypto_pk_read_public_key_from_string(crypto_pk_t *env,
const char *src, size_t len);
int crypto_pk_read_private_key_from_string(crypto_pk_t *env,
const char *s, ssize_t len);
int crypto_pk_write_private_key_to_filename(crypto_pk_t *env,
const char *fname);
int crypto_pk_check_key(crypto_pk_t *env);
int crypto_pk_cmp_keys(const crypto_pk_t *a, const crypto_pk_t *b);
int crypto_pk_eq_keys(const crypto_pk_t *a, const crypto_pk_t *b);
size_t crypto_pk_keysize(const crypto_pk_t *env);
int crypto_pk_num_bits(crypto_pk_t *env);
crypto_pk_t *crypto_pk_dup_key(crypto_pk_t *orig);
crypto_pk_t *crypto_pk_copy_full(crypto_pk_t *orig);
int crypto_pk_key_is_private(const crypto_pk_t *key);
int crypto_pk_public_exponent_ok(crypto_pk_t *env);
int crypto_pk_public_encrypt(crypto_pk_t *env, char *to, size_t tolen,
const char *from, size_t fromlen, int padding);
int crypto_pk_private_decrypt(crypto_pk_t *env, char *to, size_t tolen,
const char *from, size_t fromlen,
int padding, int warnOnFailure);
MOCK_DECL(int, crypto_pk_public_checksig,(const crypto_pk_t *env,
char *to, size_t tolen,
const char *from, size_t fromlen));
MOCK_DECL(int, crypto_pk_public_checksig_digest,(crypto_pk_t *env,
const char *data, size_t datalen,
const char *sig, size_t siglen));
int crypto_pk_private_sign(const crypto_pk_t *env, char *to, size_t tolen,
const char *from, size_t fromlen);
int crypto_pk_private_sign_digest(crypto_pk_t *env, char *to, size_t tolen,
const char *from, size_t fromlen);
int crypto_pk_obsolete_public_hybrid_encrypt(crypto_pk_t *env, char *to,
size_t tolen,
const char *from, size_t fromlen,
int padding, int force);
int crypto_pk_obsolete_private_hybrid_decrypt(crypto_pk_t *env, char *to,
size_t tolen,
const char *from, size_t fromlen,
int padding, int warnOnFailure);
int crypto_pk_asn1_encode(crypto_pk_t *pk, char *dest, size_t dest_len);
crypto_pk_t *crypto_pk_asn1_decode(const char *str, size_t len);
int crypto_pk_get_digest(const crypto_pk_t *pk, char *digest_out);
int crypto_pk_get_common_digests(crypto_pk_t *pk,
common_digests_t *digests_out);
int crypto_pk_get_fingerprint(crypto_pk_t *pk, char *fp_out,int add_space);
int crypto_pk_get_hashed_fingerprint(crypto_pk_t *pk, char *fp_out);
int crypto_pk_base64_encode(const crypto_pk_t *pk, char **priv_out);
crypto_pk_t *crypto_pk_base64_decode(const char *str, size_t len);
/* symmetric crypto */
const char *crypto_cipher_get_key(crypto_cipher_t *env);
int crypto_cipher_encrypt(crypto_cipher_t *env, char *to,
const char *from, size_t fromlen);
int crypto_cipher_decrypt(crypto_cipher_t *env, char *to,
const char *from, size_t fromlen);
void crypto_cipher_crypt_inplace(crypto_cipher_t *env, char *d, size_t len);
int crypto_cipher_encrypt_with_iv(const char *key,
char *to, size_t tolen,
const char *from, size_t fromlen);
int crypto_cipher_decrypt_with_iv(const char *key,
char *to, size_t tolen,
const char *from, size_t fromlen);
/* SHA-1 and other digests. */
int crypto_digest(char *digest, const char *m, size_t len);
int crypto_digest256(char *digest, const char *m, size_t len,
digest_algorithm_t algorithm);
int crypto_digest512(char *digest, const char *m, size_t len,
digest_algorithm_t algorithm);
int crypto_common_digests(common_digests_t *ds_out, const char *m, size_t len);
struct smartlist_t;
void crypto_digest_smartlist_prefix(char *digest_out, size_t len_out,
const char *prepend,
const struct smartlist_t *lst,
const char *append,
digest_algorithm_t alg);
void crypto_digest_smartlist(char *digest_out, size_t len_out,
const struct smartlist_t *lst, const char *append,
digest_algorithm_t alg);
const char *crypto_digest_algorithm_get_name(digest_algorithm_t alg);
size_t crypto_digest_algorithm_get_length(digest_algorithm_t alg);
int crypto_digest_algorithm_parse_name(const char *name);
crypto_digest_t *crypto_digest_new(void);
crypto_digest_t *crypto_digest256_new(digest_algorithm_t algorithm);
crypto_digest_t *crypto_digest512_new(digest_algorithm_t algorithm);
void crypto_digest_free(crypto_digest_t *digest);
void crypto_digest_add_bytes(crypto_digest_t *digest, const char *data,
size_t len);
void crypto_digest_get_digest(crypto_digest_t *digest,
char *out, size_t out_len);
crypto_digest_t *crypto_digest_dup(const crypto_digest_t *digest);
void crypto_digest_assign(crypto_digest_t *into,
const crypto_digest_t *from);
void crypto_hmac_sha256(char *hmac_out,
const char *key, size_t key_len,
const char *msg, size_t msg_len);
void crypto_mac_sha3_256(uint8_t *mac_out, size_t len_out,
const uint8_t *key, size_t key_len,
const uint8_t *msg, size_t msg_len);
crypto_xof_t *crypto_xof_new(void);
void crypto_xof_add_bytes(crypto_xof_t *xof, const uint8_t *data, size_t len);
void crypto_xof_squeeze_bytes(crypto_xof_t *xof, uint8_t *out, size_t len);
void crypto_xof_free(crypto_xof_t *xof);
/* Key negotiation */
#define DH_TYPE_CIRCUIT 1
#define DH_TYPE_REND 2
#define DH_TYPE_TLS 3
crypto_dh_t *crypto_dh_new(int dh_type);
crypto_dh_t *crypto_dh_dup(const crypto_dh_t *dh);
int crypto_dh_get_bytes(crypto_dh_t *dh);
int crypto_dh_generate_public(crypto_dh_t *dh);
int crypto_dh_get_public(crypto_dh_t *dh, char *pubkey_out,
size_t pubkey_out_len);
ssize_t crypto_dh_compute_secret(int severity, crypto_dh_t *dh,
const char *pubkey, size_t pubkey_len,
char *secret_out, size_t secret_out_len);
void crypto_dh_free(crypto_dh_t *dh);
int crypto_expand_key_material_TAP(const uint8_t *key_in,
size_t key_in_len,
uint8_t *key_out, size_t key_out_len);
int crypto_expand_key_material_rfc5869_sha256(
const uint8_t *key_in, size_t key_in_len,
const uint8_t *salt_in, size_t salt_in_len,
const uint8_t *info_in, size_t info_in_len,
uint8_t *key_out, size_t key_out_len);
/* random numbers */
int crypto_seed_rng(void) ATTR_WUR;
MOCK_DECL(void,crypto_rand,(char *to, size_t n));
void crypto_rand_unmocked(char *to, size_t n);
void crypto_strongest_rand(uint8_t *out, size_t out_len);
int crypto_rand_int(unsigned int max);
int crypto_rand_int_range(unsigned int min, unsigned int max);
uint64_t crypto_rand_uint64_range(uint64_t min, uint64_t max);
time_t crypto_rand_time_range(time_t min, time_t max);
uint64_t crypto_rand_uint64(uint64_t max);
double crypto_rand_double(void);
struct tor_weak_rng_t;
void crypto_seed_weak_rng(struct tor_weak_rng_t *rng);
int crypto_init_siphash_key(void);
char *crypto_random_hostname(int min_rand_len, int max_rand_len,
const char *prefix, const char *suffix);
struct smartlist_t;
void *smartlist_choose(const struct smartlist_t *sl);
void smartlist_shuffle(struct smartlist_t *sl);
/** OpenSSL-based utility functions. */
void memwipe(void *mem, uint8_t byte, size_t sz);
/* Prototypes for private functions only used by tortls.c, crypto.c, and the
* unit tests. */
struct rsa_st;
struct evp_pkey_st;
struct dh_st;
struct rsa_st *crypto_pk_get_rsa_(crypto_pk_t *env);
crypto_pk_t *crypto_new_pk_from_rsa_(struct rsa_st *rsa);
MOCK_DECL(struct evp_pkey_st *, crypto_pk_get_evp_pkey_,(crypto_pk_t *env,
int private));
struct dh_st *crypto_dh_get_dh_(crypto_dh_t *dh);
void crypto_add_spaces_to_fp(char *out, size_t outlen, const char *in);
#ifdef CRYPTO_PRIVATE
STATIC int crypto_force_rand_ssleay(void);
STATIC int crypto_strongest_rand_raw(uint8_t *out, size_t out_len);
#ifdef TOR_UNIT_TESTS
extern int break_strongest_rng_syscall;
extern int break_strongest_rng_fallback;
#endif
#endif /* defined(CRYPTO_PRIVATE) */
#ifdef TOR_UNIT_TESTS
void crypto_pk_assign_(crypto_pk_t *dest, const crypto_pk_t *src);
digest_algorithm_t crypto_digest_get_algorithm(crypto_digest_t *digest);
#endif
#endif /* !defined(TOR_CRYPTO_H) */
Reference in New Issue View Git Blame Copy Permalink