5 * Author: Tatu Ylonen <ylo@cs.hut.fi>
7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
10 * Created: Wed Apr 19 16:50:42 1995 ylo
19 #include <openssl/des.h>
20 #include <openssl/blowfish.h>
21 #include <openssl/rc4.h>
22 #include <openssl/cast.h>
24 /* Cipher types. New types can be added, but old types should not be removed
25 for compatibility. The maximum allowed value is 31. */
26 #define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */
27 #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
28 #define SSH_CIPHER_NONE 0 /* no encryption */
29 #define SSH_CIPHER_IDEA 1 /* IDEA CFB */
30 #define SSH_CIPHER_DES 2 /* DES CBC */
31 #define SSH_CIPHER_3DES 3 /* 3DES CBC */
32 #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
33 #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
34 #define SSH_CIPHER_BLOWFISH 6
35 #define SSH_CIPHER_RESERVED 7
37 /* these ciphers are used in SSH2: */
38 #define SSH_CIPHER_BLOWFISH_CBC 8
39 #define SSH_CIPHER_3DES_CBC 9
40 #define SSH_CIPHER_ARCFOUR 10 /* Alleged RC4 */
41 #define SSH_CIPHER_CAST128_CBC 11
47 des_key_schedule key1;
48 des_key_schedule key2;
50 des_key_schedule key3;
65 * Returns a bit mask indicating which ciphers are supported by this
66 * implementation. The bit mask has the corresponding bit set of each
69 unsigned int cipher_mask();
70 unsigned int cipher_mask1();
71 unsigned int cipher_mask2();
73 /* Returns the name of the cipher. */
74 const char *cipher_name(int cipher);
77 * Parses the name of the cipher. Returns the number of the corresponding
78 * cipher, or -1 on error.
80 int cipher_number(const char *name);
82 /* returns 1 if all ciphers are supported (ssh2 only) */
83 int ciphers_valid(const char *names);
86 * Selects the cipher to use and sets the key. If for_encryption is true,
87 * the key is setup for encryption; otherwise it is setup for decryption.
90 cipher_set_key(CipherContext * context, int cipher,
91 const unsigned char *key, int keylen);
93 cipher_set_key_iv(CipherContext * context, int cipher,
94 const unsigned char *key, int keylen,
95 const unsigned char *iv, int ivlen);
98 * Sets key for the cipher by computing the MD5 checksum of the passphrase,
99 * and using the resulting 16 bytes as the key.
102 cipher_set_key_string(CipherContext * context, int cipher,
103 const char *passphrase);
105 /* Encrypts data using the cipher. */
107 cipher_encrypt(CipherContext * context, unsigned char *dest,
108 const unsigned char *src, unsigned int len);
110 /* Decrypts data using the cipher. */
112 cipher_decrypt(CipherContext * context, unsigned char *dest,
113 const unsigned char *src, unsigned int len);
115 #endif /* CIPHER_H */