Annotation of src/usr.bin/ssh/cipher.h, Revision 1.11
1.1 deraadt 1: /*
1.9 deraadt 2: *
3: * cipher.h
4: *
5: * Author: Tatu Ylonen <ylo@cs.hut.fi>
6: *
7: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
8: * All rights reserved
9: *
10: * Created: Wed Apr 19 16:50:42 1995 ylo
11: *
12: */
1.1 deraadt 13:
1.11 ! markus 14: /* RCSID("$Id: cipher.h,v 1.10 1999/11/24 19:53:46 markus Exp $"); */
1.1 deraadt 15:
16: #ifndef CIPHER_H
17: #define CIPHER_H
18:
1.8 markus 19: #include <ssl/des.h>
1.7 deraadt 20: #include <ssl/blowfish.h>
1.1 deraadt 21:
22: /* Cipher types. New types can be added, but old types should not be removed
23: for compatibility. The maximum allowed value is 31. */
1.9 deraadt 24: #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
25: #define SSH_CIPHER_NONE 0 /* no encryption */
26: #define SSH_CIPHER_IDEA 1 /* IDEA CFB */
27: #define SSH_CIPHER_DES 2 /* DES CBC */
28: #define SSH_CIPHER_3DES 3 /* 3DES CBC */
29: #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
30: #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
1.1 deraadt 31: #define SSH_CIPHER_BLOWFISH 6
32:
33: typedef struct {
1.9 deraadt 34: unsigned int type;
35: union {
36: struct {
37: des_key_schedule key1;
38: des_key_schedule key2;
39: des_cblock iv2;
40: des_key_schedule key3;
41: des_cblock iv3;
42: } des3;
43: struct {
44: struct bf_key_st key;
45: unsigned char iv[8];
46: } bf;
47: } u;
48: } CipherContext;
1.10 markus 49: /*
50: * Returns a bit mask indicating which ciphers are supported by this
51: * implementation. The bit mask has the corresponding bit set of each
52: * supported cipher.
53: */
1.1 deraadt 54: unsigned int cipher_mask();
55:
56: /* Returns the name of the cipher. */
57: const char *cipher_name(int cipher);
58:
1.10 markus 59: /*
60: * Parses the name of the cipher. Returns the number of the corresponding
61: * cipher, or -1 on error.
62: */
1.9 deraadt 63: int cipher_number(const char *name);
1.1 deraadt 64:
1.10 markus 65: /*
66: * Selects the cipher to use and sets the key. If for_encryption is true,
67: * the key is setup for encryption; otherwise it is setup for decryption.
68: */
1.9 deraadt 69: void
70: cipher_set_key(CipherContext * context, int cipher,
71: const unsigned char *key, int keylen, int for_encryption);
1.1 deraadt 72:
1.10 markus 73: /*
74: * Sets key for the cipher by computing the MD5 checksum of the passphrase,
75: * and using the resulting 16 bytes as the key.
76: */
1.9 deraadt 77: void
78: cipher_set_key_string(CipherContext * context, int cipher,
79: const char *passphrase, int for_encryption);
1.1 deraadt 80:
81: /* Encrypts data using the cipher. */
1.9 deraadt 82: void
83: cipher_encrypt(CipherContext * context, unsigned char *dest,
84: const unsigned char *src, unsigned int len);
1.1 deraadt 85:
86: /* Decrypts data using the cipher. */
1.9 deraadt 87: void
88: cipher_decrypt(CipherContext * context, unsigned char *dest,
89: const unsigned char *src, unsigned int len);
1.1 deraadt 90:
1.9 deraadt 91: #endif /* CIPHER_H */