From d4a8b7e34dd619a4debf9a206c81db26d1402ea6 Mon Sep 17 00:00:00 2001 From: Damien Miller Date: Wed, 27 Oct 1999 13:42:43 +1000 Subject: Initial revision --- cipher.h | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 cipher.h (limited to 'cipher.h') diff --git a/cipher.h b/cipher.h new file mode 100644 index 00000000..4ecb8f8d --- /dev/null +++ b/cipher.h @@ -0,0 +1,84 @@ +/* + +cipher.h + +Author: Tatu Ylonen + +Copyright (c) 1995 Tatu Ylonen , Espoo, Finland + All rights reserved + +Created: Wed Apr 19 16:50:42 1995 ylo + +*/ + +/* RCSID("$Id: cipher.h,v 1.1 1999/10/27 03:42:44 damien Exp $"); */ + +#ifndef CIPHER_H +#define CIPHER_H + +#include +#include + +/* Cipher types. New types can be added, but old types should not be removed + for compatibility. The maximum allowed value is 31. */ +#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */ +#define SSH_CIPHER_NONE 0 /* no encryption */ +#define SSH_CIPHER_IDEA 1 /* IDEA CFB */ +#define SSH_CIPHER_DES 2 /* DES CBC */ +#define SSH_CIPHER_3DES 3 /* 3DES CBC */ +#define SSH_CIPHER_TSS 4 /* TRI's Simple Stream encryption CBC */ +#define SSH_CIPHER_RC4 5 /* Alleged RC4 */ +#define SSH_CIPHER_BLOWFISH 6 + +typedef struct { + unsigned int type; + union { + struct { + des_key_schedule key1; + des_key_schedule key2; + des_cblock iv2; + des_key_schedule key3; + des_cblock iv3; + } des3; + struct { + struct bf_key_st key; + unsigned char iv[8]; + } bf; + } u; +} CipherContext; + +/* Returns a bit mask indicating which ciphers are supported by this + implementation. The bit mask has the corresponding bit set of each + supported cipher. */ +unsigned int cipher_mask(); + +/* Returns the name of the cipher. */ +const char *cipher_name(int cipher); + +/* Parses the name of the cipher. Returns the number of the corresponding + cipher, or -1 on error. */ +int cipher_number(const char *name); + +/* Selects the cipher to use and sets the key. If for_encryption is true, + the key is setup for encryption; otherwise it is setup for decryption. */ +void cipher_set_key(CipherContext *context, int cipher, + const unsigned char *key, int keylen, int for_encryption); + +/* Sets key for the cipher by computing the MD5 checksum of the passphrase, + and using the resulting 16 bytes as the key. */ +void cipher_set_key_string(CipherContext *context, int cipher, + const char *passphrase, int for_encryption); + +/* Encrypts data using the cipher. */ +void cipher_encrypt(CipherContext *context, unsigned char *dest, + const unsigned char *src, unsigned int len); + +/* Decrypts data using the cipher. */ +void cipher_decrypt(CipherContext *context, unsigned char *dest, + const unsigned char *src, unsigned int len); + +/* If and CRC-32 attack is detected this function is called. Defaults + * to fatal, changed to packet_disconnect in sshd and ssh. */ +extern void (*cipher_attack_detected)(const char *fmt, ...); + +#endif /* CIPHER_H */ -- cgit v1.2.3