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- /* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- #ifndef __CRYPTO_H
- #define __CRYPTO_H
- #include <stdio.h>
- #include <openssl/rsa.h>
- #include <openssl/dh.h>
- /* available encryption primitives */
- #define CRYPTO_CIPHER_IDENTITY 0
- #define CRYPTO_CIPHER_DES 1
- #define CRYPTO_CIPHER_RC4 2
- #define CRYPTO_CIPHER_3DES 3
- #define CRYPTO_CIPHER_AES_CTR 4
- #define CRYPTO_PK_RSA 0
- #define CRYPTO_SHA1_DIGEST 0
- 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;
- /* global state */
- int crypto_global_init();
- int crypto_global_cleanup();
- /* environment setup */
- crypto_pk_env_t *crypto_new_pk_env(int type);
- void crypto_free_pk_env(crypto_pk_env_t *env);
- crypto_cipher_env_t *crypto_new_cipher_env(int type);
- 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_file(crypto_pk_env_t *env, FILE *src);
- int crypto_pk_read_public_key_from_file(crypto_pk_env_t *env, FILE *src);
- int crypto_pk_write_public_key_to_string(crypto_pk_env_t *env, char **dest, int *len);
- int crypto_pk_read_public_key_from_string(crypto_pk_env_t *env, const char *src, int len);
- int crypto_pk_write_private_key_to_file(crypto_pk_env_t *env, FILE *dest);
- int crypto_pk_write_private_key_to_filename(crypto_pk_env_t *env, const char *fname);
- int crypto_pk_write_public_key_to_file(crypto_pk_env_t *env, FILE *dest);
- int crypto_pk_check_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_set_key(crypto_pk_env_t *env, unsigned char *key);
- int crypto_pk_cmp_keys(crypto_pk_env_t *a, crypto_pk_env_t *b);
- crypto_pk_env_t *crypto_pk_dup_key(crypto_pk_env_t *orig);
- int crypto_pk_keysize(crypto_pk_env_t *env);
- int crypto_pk_public_encrypt(crypto_pk_env_t *env, unsigned char *from, int fromlen, unsigned char *to, int padding);
- int crypto_pk_private_decrypt(crypto_pk_env_t *env, unsigned char *from, int fromlen, unsigned char *to, int padding);
- int crypto_pk_private_sign(crypto_pk_env_t *env, unsigned char *from, int fromlen, unsigned char *to);
- int crypto_pk_public_checksig(crypto_pk_env_t *env, unsigned char *from, int fromlen, unsigned char *to);
- #define FINGERPRINT_LEN 49
- int crypto_pk_get_fingerprint(crypto_pk_env_t *pk, char *fp_out);
- int crypto_pk_check_fingerprint_syntax(const char *s);
- int base64_encode(char *dest, int destlen, const char *src, int srclen);
- int base64_decode(char *dest, int destlen, const char *src, int srclen);
- /* Key negotiation */
- typedef struct crypto_dh_env_st {
- DH *dh;
- } crypto_dh_env_t;
- /* #define CRYPTO_DH_SIZE (1536 / 8) */
- #define CRYPTO_DH_SIZE (1024 / 8)
- crypto_dh_env_t *crypto_dh_new();
- int crypto_dh_get_bytes(crypto_dh_env_t *dh);
- int crypto_dh_get_public(crypto_dh_env_t *dh, char *pubkey_out,
- int pubkey_out_len);
- int crypto_dh_compute_secret(crypto_dh_env_t *dh,
- char *pubkey, int pubkey_len,
- char *secret_out, int secret_out_len);
- void crypto_dh_free(crypto_dh_env_t *dh);
- /* symmetric crypto */
- int crypto_cipher_generate_key(crypto_cipher_env_t *env);
- int crypto_cipher_set_iv(crypto_cipher_env_t *env, unsigned char *iv);
- int crypto_cipher_set_key(crypto_cipher_env_t *env, unsigned char *key);
- int crypto_cipher_encrypt_init_cipher(crypto_cipher_env_t *env);
- int crypto_cipher_decrypt_init_cipher(crypto_cipher_env_t *env);
- unsigned char *crypto_cipher_get_key(crypto_cipher_env_t *env);
- int crypto_cipher_encrypt(crypto_cipher_env_t *env, unsigned char *from, unsigned int fromlen, unsigned char *to);
- int crypto_cipher_decrypt(crypto_cipher_env_t *env, unsigned char *from, unsigned int fromlen, unsigned char *to);
- /* only implemented for CRYPTO_CIPHER_AES_CTR */
- int crypto_cipher_rewind(crypto_cipher_env_t *env, long delta);
- int crypto_cipher_advance(crypto_cipher_env_t *env, long delta);
- /* convenience function: wraps crypto_create_crypto_env, set_key, set_iv, and init. */
- crypto_cipher_env_t *crypto_create_init_cipher(int cipher_type, char *key, char *iv, int encrypt_mode);
- /* SHA-1 */
- int crypto_SHA_digest(const unsigned char *m, int len, unsigned char *digest);
- crypto_digest_env_t *crypto_new_digest_env(int type);
- 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);
- /* random numbers */
- int crypto_seed_rng();
- int crypto_rand(unsigned int n, unsigned char *to);
- void crypto_pseudo_rand(unsigned int n, unsigned char *to);
- int crypto_pseudo_rand_int(unsigned int max);
- /* errors */
- char *crypto_perror();
- #endif
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