2 * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file crypt.h Prototypes for paraslash crypto functions. */
9 /** Opaque structure for public and private keys. */
10 struct asymmetric_key;
12 int pub_encrypt(struct asymmetric_key *pub, unsigned char *inbuf,
13 unsigned len, unsigned char *outbuf);
14 int priv_decrypt(const char *key_file, unsigned char *outbuf,
15 unsigned char *inbuf, int inlen);
16 int get_asymmetric_key(const char *key_file, int private,
17 struct asymmetric_key **result);
18 void free_asymmetric_key(struct asymmetric_key *key);
20 void get_random_bytes_or_die(unsigned char *buf, int num);
21 void init_random_seed_or_die(void);
26 * Used on the server-side for client-server communication encryption.
28 * The traffic between (the forked child of) para_server and the remote client
29 * process is crypted by a symmetric session key. This structure contains the
30 * keys for the stream cipher and the file descriptor for which these keys
34 /** The socket file descriptor. */
36 /** Key used for receiving data. */
37 struct stream_cipher *recv;
38 /** Key used for sending data. */
39 struct stream_cipher *send;
42 struct stream_cipher *stream_cipher_new(const unsigned char *data, int len);
43 void stream_cipher_free(struct stream_cipher *sc);
45 int rc4_send_bin_buffer(struct rc4_context *rc4c, const char *buf, size_t len);
46 int rc4_send_buffer(struct rc4_context *rc4c, const char *buf);
47 __printf_2_3 int rc4_send_va_buffer(struct rc4_context *rc4c, const char *fmt, ...);
48 int rc4_recv_bin_buffer(struct rc4_context *rcc, char *buf, size_t size);
49 int rc4_recv_buffer(struct rc4_context *rcc, char *buf, size_t size);
51 /** \cond used to distinguish between loading of private/public key */
52 #define LOAD_PUBLIC_KEY 0
53 #define LOAD_PRIVATE_KEY 1
54 #define CHALLENGE_SIZE 64