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revision 9254 by yutakapon, Wed Oct 16 13:19:25 2019 UTC revision 9255 by nmaya, Wed May 19 14:11:26 2021 UTC
# Line 1  Line 1 
1  /*      $OpenBSD: cipher.h,v 1.34 2003/11/10 16:23:41 jakob Exp $       */  /* Imported from OpenSSH-8.5p1, TeraTerm Project */
2    
3    /* $OpenBSD: cipher.h,v 1.44 2014/01/25 10:12:50 dtucker Exp $ */
4    
5  /*  /*
6   * Author: Tatu Ylonen <ylo@cs.hut.fi>   * Author: Tatu Ylonen <ylo@cs.hut.fi>
# Line 37  Line 39 
39  #ifndef CIPHER_H  #ifndef CIPHER_H
40  #define CIPHER_H  #define CIPHER_H
41    
42    typedef unsigned int u_int;
43    typedef unsigned char u_char;
44    
45  #include <openssl/evp.h>  #include <openssl/evp.h>
46    #include "cipher-chachapoly.h"
47    
48  /*  /*
49   * Cipher types for SSH-1.  New types can be added, but old types should not   * Cipher types for SSH-1.  New types can be added, but old types should not
50   * be removed for compatibility.  The maximum allowed value is 31.   * be removed for compatibility.  The maximum allowed value is 31.
# Line 45  Line 52 
52  #define SSH_CIPHER_SSH2         -3  #define SSH_CIPHER_SSH2         -3
53  #define SSH_CIPHER_ILLEGAL      -2      /* No valid cipher selected. */  #define SSH_CIPHER_ILLEGAL      -2      /* No valid cipher selected. */
54  #define SSH_CIPHER_NOT_SET      -1      /* None selected (invalid number). */  #define SSH_CIPHER_NOT_SET      -1      /* None selected (invalid number). */
55  #define SSH_CIPHER_NONE         0       /* no encryption */  //#define SSH_CIPHER_NONE               0       /* no encryption */
56  #define SSH_CIPHER_IDEA         1       /* IDEA CFB */  //#define SSH_CIPHER_IDEA               1       /* IDEA CFB */
57  #define SSH_CIPHER_DES          2       /* DES CBC */  //#define SSH_CIPHER_DES                2       /* DES CBC */
58  #define SSH_CIPHER_3DES         3       /* 3DES CBC */  //#define SSH_CIPHER_3DES               3       /* 3DES CBC */
59  #define SSH_CIPHER_BROKEN_TSS   4       /* TRI's Simple Stream encryption CBC */  //#define SSH_CIPHER_BROKEN_TSS 4       /* TRI's Simple Stream encryption CBC */
60  #define SSH_CIPHER_BROKEN_RC4   5       /* Alleged RC4 */  //#define SSH_CIPHER_BROKEN_RC4 5       /* Alleged RC4 */
61  #define SSH_CIPHER_BLOWFISH     6  //#define SSH_CIPHER_BLOWFISH   6
62  #define SSH_CIPHER_RESERVED     7  //#define SSH_CIPHER_RESERVED   7
63    
64  #define CIPHER_ENCRYPT          1  #define CIPHER_ENCRYPT          1
65  #define CIPHER_DECRYPT          0  #define CIPHER_DECRYPT          0
66    
 typedef struct Cipher Cipher;  
 typedef struct CipherContext CipherContext;  
67    
68  struct Cipher;  typedef enum {
69  struct CipherContext {          // SSH1
70          int     plaintext;          SSH_CIPHER_NONE, SSH_CIPHER_IDEA, SSH_CIPHER_DES, SSH_CIPHER_3DES,
71            SSH_CIPHER_TSS, SSH_CIPHER_RC4, SSH_CIPHER_BLOWFISH,
72            // SSH2
73            SSH2_CIPHER_3DES_CBC, SSH2_CIPHER_AES128_CBC,
74            SSH2_CIPHER_AES192_CBC, SSH2_CIPHER_AES256_CBC,
75            SSH2_CIPHER_BLOWFISH_CBC, SSH2_CIPHER_AES128_CTR,
76            SSH2_CIPHER_AES192_CTR, SSH2_CIPHER_AES256_CTR,
77            SSH2_CIPHER_ARCFOUR, SSH2_CIPHER_ARCFOUR128, SSH2_CIPHER_ARCFOUR256,
78            SSH2_CIPHER_CAST128_CBC,
79            SSH2_CIPHER_3DES_CTR, SSH2_CIPHER_BLOWFISH_CTR, SSH2_CIPHER_CAST128_CTR,
80            SSH2_CIPHER_CAMELLIA128_CBC, SSH2_CIPHER_CAMELLIA192_CBC, SSH2_CIPHER_CAMELLIA256_CBC,
81            SSH2_CIPHER_CAMELLIA128_CTR, SSH2_CIPHER_CAMELLIA192_CTR, SSH2_CIPHER_CAMELLIA256_CTR,
82            SSH2_CIPHER_AES128_GCM, SSH2_CIPHER_AES256_GCM, SSH2_CIPHER_CHACHAPOLY,
83            SSH_CIPHER_MAX = SSH2_CIPHER_CHACHAPOLY,
84    } SSHCipherId;
85    
86    struct ssh2cipher {
87            SSHCipherId id;
88            char *name;
89            u_int block_size;
90            u_int key_len;
91            u_int discard_len;
92            u_int iv_len;
93            u_int auth_len;
94            const EVP_CIPHER *(*func)(void);
95    };
96    
97    struct sshcipher_ctx {
98            // TTSSH では SSH_CIPHER_NONE が無効なので、plaintext は使用されない
99            // int  plaintext;
100            
101            // TTSSH では CRYPT_encrypt_aead(), CRYPT_decrypt_aead() が別れていて encrypt で切り替えないので使用されない
102            // int  encrypt;
103            
104          EVP_CIPHER_CTX *evp;          EVP_CIPHER_CTX *evp;
105          Cipher *cipher;          struct chachapoly_ctx *cp_ctx;
106            
107            // OpenSSH で ifndef WITH_OPENSSL の時に使用されるものなので、ac_ctx は使用されない
108            // aesctr_ctx ac_ctx; /* XXX union with evp? */
109            
110            // OpenSSH では const struct sshcipher *cipher;
111            const struct ssh2cipher *cipher;
112  };  };
113    
 u_int    cipher_mask_ssh1(int);  
 Cipher  *cipher_by_name(const char *);  
 Cipher  *cipher_by_number(int);  
 int      cipher_number(const char *);  
 char    *cipher_name(int);  
 int      ciphers_valid(const char *);  
 void     cipher_init(CipherContext *, Cipher *, const u_char *, u_int,  
     const u_char *, u_int, int);  
 void     cipher_crypt(CipherContext *, u_char *, const u_char *, u_int);  
 void     cipher_cleanup(CipherContext *);  
 void     cipher_set_key_string(CipherContext *, Cipher *, const char *, int);  
 u_int    cipher_blocksize(const Cipher *);  
 u_int    cipher_keylen(const Cipher *);  
   
 u_int    cipher_get_number(const Cipher *);  
 void     cipher_get_keyiv(CipherContext *, u_char *, u_int);  
 void     cipher_set_keyiv(CipherContext *, u_char *);  
 int      cipher_get_keyiv_len(const CipherContext *);  
 int      cipher_get_keycontext(const CipherContext *, u_char *);  
 void     cipher_set_keycontext(CipherContext *, u_char *);  
   
 void cipher_init_SSH2(  
                 EVP_CIPHER_CTX *evp,  
                 const u_char *key, u_int keylen,  
                 const u_char *iv, u_int ivlen,  
                 int encrypt,  
                 const EVP_CIPHER *type,  
                 int discard_len,  
                 unsigned int authlen,  
                 PTInstVar pvar  
 );  
114    
115  void cipher_cleanup_SSH2(EVP_CIPHER_CTX *evp);  int get_cipher_id(const struct ssh2cipher *cipher);
116    u_int get_cipher_block_size(const struct ssh2cipher *cipher);
117    u_int get_cipher_key_len(const struct ssh2cipher *cipher);
118    u_int get_cipher_discard_len(const struct ssh2cipher *cipher);
119    u_int get_cipher_iv_len(const struct ssh2cipher *cipher);
120    u_int get_cipher_auth_len(const struct ssh2cipher *cipher);
121    const EVP_CIPHER *get_cipher_EVP_CIPHER(const struct ssh2cipher *cipher);
122    char *get_cipher_string(const struct ssh2cipher *cipher);
123    const struct ssh2cipher* get_cipher_by_name(char *name);
124    char *get_cipher_name(int cipher_id);
125    wchar_t *get_listbox_cipher_nameW(int cipher_id, PTInstVar pvar);
126    
127    void normalize_cipher_order(char *buf);
128    const struct ssh2cipher *choose_SSH2_cipher_algorithm(char *server_proposal, char *my_proposal);
129    void SSH2_update_cipher_myproposal(PTInstVar pvar);
130    
131    int cipher_init_SSH2(
132            struct sshcipher_ctx **ccp, const struct ssh2cipher *cipher,
133            const u_char *key, u_int keylen,
134            const u_char *iv, u_int ivlen,
135            int do_encrypt,
136            PTInstVar pvar
137    );
138    void cipher_free_SSH2(struct sshcipher_ctx *cc);
139    
140  #endif                          /* CIPHER_H */  #endif                          /* CIPHER_H */
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