crypto_cipher.h (2117B)
1 /* Copyright (c) 2001, Matej Pfajfar. 2 * Copyright (c) 2001-2004, Roger Dingledine. 3 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. 4 * Copyright (c) 2007-2021, The Tor Project, Inc. */ 5 /* See LICENSE for licensing information */ 6 7 /** 8 * \file crypto_cipher.h 9 * 10 * \brief Headers for crypto_cipher.c 11 **/ 12 13 #ifndef TOR_CRYPTO_CIPHER_H 14 #define TOR_CRYPTO_CIPHER_H 15 16 #include "orconfig.h" 17 18 #include <stdio.h> 19 #include "lib/cc/torint.h" 20 21 /** Length of our symmetric cipher's keys of 128-bit. */ 22 #define CIPHER_KEY_LEN 16 23 /** Length of our symmetric cipher's IV of 128-bit. */ 24 #define CIPHER_IV_LEN 16 25 /** Length of our symmetric cipher's keys of 256-bit. */ 26 #define CIPHER256_KEY_LEN 32 27 28 typedef struct aes_cnt_cipher_t crypto_cipher_t; 29 30 /* environment setup */ 31 crypto_cipher_t *crypto_cipher_new(const char *key); 32 crypto_cipher_t *crypto_cipher_new_with_bits(const char *key, int bits); 33 crypto_cipher_t *crypto_cipher_new_with_iv(const char *key, const char *iv); 34 crypto_cipher_t *crypto_cipher_new_with_iv_and_bits(const uint8_t *key, 35 const uint8_t *iv, 36 int bits); 37 void crypto_cipher_free_(crypto_cipher_t *env); 38 #define crypto_cipher_free(c) \ 39 FREE_AND_NULL(crypto_cipher_t, crypto_cipher_free_, (c)) 40 41 /* symmetric crypto */ 42 const char *crypto_cipher_get_key(crypto_cipher_t *env); 43 44 int crypto_cipher_encrypt(crypto_cipher_t *env, char *to, 45 const char *from, size_t fromlen); 46 int crypto_cipher_decrypt(crypto_cipher_t *env, char *to, 47 const char *from, size_t fromlen); 48 void crypto_cipher_crypt_inplace(crypto_cipher_t *env, char *d, size_t len); 49 50 int crypto_cipher_encrypt_with_iv(const char *key, 51 char *to, size_t tolen, 52 const char *from, size_t fromlen); 53 int crypto_cipher_decrypt_with_iv(const char *key, 54 char *to, size_t tolen, 55 const char *from, size_t fromlen); 56 57 #endif /* !defined(TOR_CRYPTO_CIPHER_H) */