/*
-
-cipher.h
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
-
-Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
-
-Created: Wed Apr 19 16:50:42 1995 ylo
-
-*/
-
-/* RCSID("$Id$"); */
+ *
+ * cipher.h
+ *
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ *
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * Created: Wed Apr 19 16:50:42 1995 ylo
+ *
+ */
+
+/* RCSID("$OpenBSD: cipher.h,v 1.18 2000/06/20 01:39:40 markus Exp $"); */
#ifndef CIPHER_H
#define CIPHER_H
-#include "config.h"
-
-#ifdef HAVE_OPENSSL
#include <openssl/des.h>
#include <openssl/blowfish.h>
-#endif
-#ifdef HAVE_SSL
-#include <ssl/des.h>
-#include <ssl/blowfish.h>
-#endif
+#include <openssl/rc4.h>
+#include <openssl/cast.h>
/* 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_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
-#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
+#define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */
+#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_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
+#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
#define SSH_CIPHER_BLOWFISH 6
+#define SSH_CIPHER_RESERVED 7
-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;
+/* these ciphers are used in SSH2: */
+#define SSH_CIPHER_BLOWFISH_CBC 8
+#define SSH_CIPHER_3DES_CBC 9
+#define SSH_CIPHER_ARCFOUR 10 /* Alleged RC4 */
+#define SSH_CIPHER_CAST128_CBC 11
-/* Returns a bit mask indicating which ciphers are supported by this
- implementation. The bit mask has the corresponding bit set of each
- supported cipher. */
+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;
+ struct {
+ CAST_KEY key;
+ unsigned char iv[8];
+ } cast;
+ RC4_KEY rc4;
+ } 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();
+unsigned int cipher_mask1();
+unsigned int cipher_mask2();
/* 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);
+/*
+ * 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);
+/* returns 1 if all ciphers are supported (ssh2 only) */
+int ciphers_valid(const char *names);
-/* 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);
+/*
+ * 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);
+void
+cipher_set_key_iv(CipherContext * context, int cipher,
+ const unsigned char *key, int keylen,
+ const unsigned char *iv, int ivlen);
+
+/*
+ * 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);
/* Encrypts data using the cipher. */
-void cipher_encrypt(CipherContext *context, unsigned char *dest,
- const unsigned char *src, unsigned int len);
+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, ...);
+void
+cipher_decrypt(CipherContext * context, unsigned char *dest,
+ const unsigned char *src, unsigned int len);
-#endif /* CIPHER_H */
+#endif /* CIPHER_H */
andersk / openssh.git / blobdiff