crypto.h
上传用户:awang829
上传日期:2019-07-14
资源大小:2356k
文件大小:9k
- /* Copyright (c) 2001, Matej Pfajfar.
- * Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2009, 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 <stdio.h>
- #include "torint.h"
- /** Length of the output of our message digest. */
- #define DIGEST_LEN 20
- /** Length of our symmetric cipher's keys. */
- #define CIPHER_KEY_LEN 16
- /** Length of our symmetric cipher's IV. */
- #define CIPHER_IV_LEN 16
- /** Length of our public keys. */
- #define PK_BYTES (1024/8)
- /** Length of our DH keys. */
- #define DH_BYTES (1024/8)
- /** Length of a message digest when encoded in base64 with trailing = signs
- * removed. */
- #define BASE64_DIGEST_LEN 27
- /** Constants used to indicate no padding for public-key encryption */
- #define PK_NO_PADDING 60000
- /** Constants used to indicate PKCS1 padding for public-key encryption */
- #define PK_PKCS1_PADDING 60001
- /** Constants used to indicate OAEP padding for public-key encryption */
- #define PK_PKCS1_OAEP_PADDING 60002
- /** Number of bytes added for PKCS1 padding. */
- #define PKCS1_PADDING_OVERHEAD 11
- /** 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
- typedef struct crypto_pk_env_t crypto_pk_env_t;
- typedef struct crypto_cipher_env_t crypto_cipher_env_t;
- typedef struct crypto_digest_env_t crypto_digest_env_t;
- typedef struct crypto_dh_env_t crypto_dh_env_t;
- /* global state */
- int crypto_global_init(int hardwareAccel);
- void crypto_thread_cleanup(void);
- int crypto_global_cleanup(void);
- /* environment setup */
- crypto_pk_env_t *crypto_new_pk_env(void);
- void crypto_free_pk_env(crypto_pk_env_t *env);
- /* convenience function: wraps crypto_create_crypto_env, set_key, and init. */
- crypto_cipher_env_t *crypto_create_init_cipher(const char *key,
- int encrypt_mode);
- crypto_cipher_env_t *crypto_new_cipher_env(void);
- void crypto_free_cipher_env(crypto_cipher_env_t *env);
- /* public key crypto */
- int crypto_pk_generate_key(crypto_pk_env_t *env);
- int crypto_pk_read_private_key_from_filename(crypto_pk_env_t *env,
- const char *keyfile);
- int crypto_pk_write_public_key_to_string(crypto_pk_env_t *env,
- char **dest, size_t *len);
- int crypto_pk_write_private_key_to_string(crypto_pk_env_t *env,
- char **dest, size_t *len);
- int crypto_pk_read_public_key_from_string(crypto_pk_env_t *env,
- const char *src, size_t len);
- int crypto_pk_read_private_key_from_string(crypto_pk_env_t *env,
- const char *s);
- int crypto_pk_write_private_key_to_filename(crypto_pk_env_t *env,
- const char *fname);
- int crypto_pk_check_key(crypto_pk_env_t *env);
- int crypto_pk_cmp_keys(crypto_pk_env_t *a, crypto_pk_env_t *b);
- size_t crypto_pk_keysize(crypto_pk_env_t *env);
- crypto_pk_env_t *crypto_pk_dup_key(crypto_pk_env_t *orig);
- crypto_pk_env_t *crypto_pk_copy_full(crypto_pk_env_t *orig);
- int crypto_pk_key_is_private(const crypto_pk_env_t *key);
- int crypto_pk_public_encrypt(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen, int padding);
- int crypto_pk_private_decrypt(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen,
- int padding, int warnOnFailure);
- int crypto_pk_public_checksig(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen);
- int crypto_pk_public_checksig_digest(crypto_pk_env_t *env, const char *data,
- size_t datalen, const char *sig, size_t siglen);
- int crypto_pk_private_sign(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen);
- int crypto_pk_private_sign_digest(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen);
- int crypto_pk_public_hybrid_encrypt(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen,
- int padding, int force);
- int crypto_pk_private_hybrid_decrypt(crypto_pk_env_t *env, char *to,
- const char *from, size_t fromlen,
- int padding, int warnOnFailure);
- int crypto_pk_asn1_encode(crypto_pk_env_t *pk, char *dest, size_t dest_len);
- crypto_pk_env_t *crypto_pk_asn1_decode(const char *str, size_t len);
- int crypto_pk_get_digest(crypto_pk_env_t *pk, char *digest_out);
- int crypto_pk_get_fingerprint(crypto_pk_env_t *pk, char *fp_out,int add_space);
- int crypto_pk_check_fingerprint_syntax(const char *s);
- /* symmetric crypto */
- int crypto_cipher_generate_key(crypto_cipher_env_t *env);
- int crypto_cipher_set_key(crypto_cipher_env_t *env, const char *key);
- void crypto_cipher_generate_iv(char *iv_out);
- int crypto_cipher_set_iv(crypto_cipher_env_t *env, const char *iv);
- const char *crypto_cipher_get_key(crypto_cipher_env_t *env);
- int crypto_cipher_encrypt_init_cipher(crypto_cipher_env_t *env);
- int crypto_cipher_decrypt_init_cipher(crypto_cipher_env_t *env);
- int crypto_cipher_encrypt(crypto_cipher_env_t *env, char *to,
- const char *from, size_t fromlen);
- int crypto_cipher_decrypt(crypto_cipher_env_t *env, char *to,
- const char *from, size_t fromlen);
- int crypto_cipher_crypt_inplace(crypto_cipher_env_t *env, char *d, size_t len);
- int crypto_cipher_encrypt_with_iv(crypto_cipher_env_t *env,
- char *to, size_t tolen,
- const char *from, size_t fromlen);
- int crypto_cipher_decrypt_with_iv(crypto_cipher_env_t *env,
- char *to, size_t tolen,
- const char *from, size_t fromlen);
- /* SHA-1 */
- int crypto_digest(char *digest, const char *m, size_t len);
- crypto_digest_env_t *crypto_new_digest_env(void);
- void crypto_free_digest_env(crypto_digest_env_t *digest);
- void crypto_digest_add_bytes(crypto_digest_env_t *digest, const char *data,
- size_t len);
- void crypto_digest_get_digest(crypto_digest_env_t *digest,
- char *out, size_t out_len);
- crypto_digest_env_t *crypto_digest_dup(const crypto_digest_env_t *digest);
- void crypto_digest_assign(crypto_digest_env_t *into,
- const crypto_digest_env_t *from);
- void crypto_hmac_sha1(char *hmac_out,
- const char *key, size_t key_len,
- const char *msg, size_t msg_len);
- /* Key negotiation */
- crypto_dh_env_t *crypto_dh_new(void);
- int crypto_dh_get_bytes(crypto_dh_env_t *dh);
- int crypto_dh_generate_public(crypto_dh_env_t *dh);
- int crypto_dh_get_public(crypto_dh_env_t *dh, char *pubkey_out,
- size_t pubkey_out_len);
- ssize_t crypto_dh_compute_secret(crypto_dh_env_t *dh,
- const char *pubkey, size_t pubkey_len,
- char *secret_out, size_t secret_out_len);
- void crypto_dh_free(crypto_dh_env_t *dh);
- int crypto_expand_key_material(const char *key_in, size_t in_len,
- char *key_out, size_t key_out_len);
- /* random numbers */
- int crypto_seed_rng(int startup);
- int crypto_rand(char *to, size_t n);
- int crypto_rand_int(unsigned int max);
- uint64_t crypto_rand_uint64(uint64_t max);
- 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);
- int base64_encode(char *dest, size_t destlen, const char *src, size_t srclen);
- int base64_decode(char *dest, size_t destlen, const char *src, size_t srclen);
- /** Characters that can appear (case-insensitively) in a base-32 encoding. */
- #define BASE32_CHARS "abcdefghijklmnopqrstuvwxyz234567"
- void base32_encode(char *dest, size_t destlen, const char *src, size_t srclen);
- int base32_decode(char *dest, size_t destlen, const char *src, size_t srclen);
- int digest_to_base64(char *d64, const char *digest);
- int digest_from_base64(char *digest, const char *d64);
- /** Length of RFC2440-style S2K specifier: the first 8 bytes are a salt, the
- * 9th describes how much iteration to do. */
- #define S2K_SPECIFIER_LEN 9
- void secret_to_key(char *key_out, size_t key_out_len, const char *secret,
- size_t secret_len, const char *s2k_specifier);
- #ifdef CRYPTO_PRIVATE
- /* Prototypes for private functions only used by tortls.c and crypto.c */
- struct rsa_st;
- struct evp_pkey_st;
- struct dh_st;
- struct rsa_st *_crypto_pk_env_get_rsa(crypto_pk_env_t *env);
- crypto_pk_env_t *_crypto_new_pk_env_rsa(struct rsa_st *rsa);
- crypto_pk_env_t *_crypto_new_pk_env_evp_pkey(struct evp_pkey_st *pkey);
- struct evp_pkey_st *_crypto_pk_env_get_evp_pkey(crypto_pk_env_t *env,
- int private);
- struct dh_st *_crypto_dh_env_get_dh(crypto_dh_env_t *dh);
- /* Prototypes for private functions only used by crypto.c and test.c*/
- void add_spaces_to_fp(char *out, size_t outlen, const char *in);
- #endif
- #endif