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revision 10125 by zmatsuo, Fri Aug 5 16:18:01 2022 UTC revision 10528 by zmatsuo, Sat Jan 21 17:41:45 2023 UTC
# Line 1  Line 1 
1  /* Imported from OpenSSH-7.5p1, TeraTerm Project */  /* Imported from OpenSSH-7.5p1, TeraTerm Project */
2    
3  /* $OpenBSD: cipher-3des1.c,v 1.12 2015/01/14 10:24:42 markus Exp $ */  /* $OpenBSD: cipher-3des1.c,v 1.12 2015/01/14 10:24:42 markus Exp $ */
4  /*  /*
5   * Copyright (c) 2003 Markus Friedl.  All rights reserved.   * Copyright (c) 2003 Markus Friedl.  All rights reserved.
6   *   *
7   * Permission to use, copy, modify, and distribute this software for any   * Permission to use, copy, modify, and distribute this software for any
8   * purpose with or without fee is hereby granted, provided that the above   * purpose with or without fee is hereby granted, provided that the above
9   * copyright notice and this permission notice appear in all copies.   * copyright notice and this permission notice appear in all copies.
10   *   *
11   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
12   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
13   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
14   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
17   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
18   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21   */   */
22    
23  // #include "includes.h"  // #include "includes.h"
24    
25  #include <sys/types.h>  #include <sys/types.h>
26  #include <string.h>  #include <string.h>
27  #include <openssl/evp.h>  #include <openssl/evp.h>
28  #include <windows.h>  #include <windows.h>
29    
30  typedef unsigned int u_int;  typedef unsigned int u_int;
31  typedef unsigned char u_char;  typedef unsigned char u_char;
32    
33  #include "ssherr.h"  #include "ssherr.h"
34    
35  /*  /*
36   * This is used by SSH1:   * This is used by SSH1:
37   *   *
38   * What kind of triple DES are these 2 routines?   * What kind of triple DES are these 2 routines?
39   *   *
40   * Why is there a redundant initialization vector?   * Why is there a redundant initialization vector?
41   *   *
42   * If only iv3 was used, then, this would till effect have been   * If only iv3 was used, then, this would till effect have been
43   * outer-cbc. However, there is also a private iv1 == iv2 which   * outer-cbc. However, there is also a private iv1 == iv2 which
44   * perhaps makes differential analysis easier. On the other hand, the   * perhaps makes differential analysis easier. On the other hand, the
45   * private iv1 probably makes the CRC-32 attack ineffective. This is a   * private iv1 probably makes the CRC-32 attack ineffective. This is a
46   * result of that there is no longer any known iv1 to use when   * result of that there is no longer any known iv1 to use when
47   * choosing the X block.   * choosing the X block.
48   */   */
49  struct ssh1_3des_ctx  struct ssh1_3des_ctx
50  {  {
51          EVP_CIPHER_CTX  *k1, *k2, *k3;          EVP_CIPHER_CTX  *k1, *k2, *k3;
52  };  };
53    
54  const EVP_CIPHER * evp_ssh1_3des(void);  const EVP_CIPHER * evp_ssh1_3des(void);
55    
56  static int ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, int enc)  static int ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, int enc)
57  {  {
58          struct ssh1_3des_ctx *c;          struct ssh1_3des_ctx *c;
59          u_char *k1, *k2, *k3;          u_char *k1, *k2, *k3;
60    
61          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) {          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) {
62                  if ((c = calloc(1, sizeof(*c))) == NULL)                  if ((c = calloc(1, sizeof(*c))) == NULL)
63                          return 0;                          return 0;
64                  EVP_CIPHER_CTX_set_app_data(ctx, c);                  EVP_CIPHER_CTX_set_app_data(ctx, c);
65          }          }
66          if (key == NULL)          if (key == NULL)
67                  return 1;                  return 1;
68          if (enc == -1)          if (enc == -1)
69                  enc = EVP_CIPHER_CTX_encrypting(ctx); // ctx->encrypt                  enc = EVP_CIPHER_CTX_encrypting(ctx); // ctx->encrypt
70          k1 = k2 = k3 = (u_char *) key;          k1 = k2 = k3 = (u_char *) key;
71          k2 += 8;          k2 += 8;
72          if (EVP_CIPHER_CTX_key_length(ctx) >= 16+8) {          if (EVP_CIPHER_CTX_key_length(ctx) >= 16+8) {
73                  if (enc)                  if (enc)
74                          k3 += 16;                          k3 += 16;
75                  else                  else
76                          k1 += 16;                          k1 += 16;
77          }          }
78          c->k1 = EVP_CIPHER_CTX_new();          c->k1 = EVP_CIPHER_CTX_new();
79          c->k2 = EVP_CIPHER_CTX_new();          c->k2 = EVP_CIPHER_CTX_new();
80          c->k3 = EVP_CIPHER_CTX_new();          c->k3 = EVP_CIPHER_CTX_new();
81          /*** TODO: OPENSSL1.1.1 ERROR CHECK(ticket#39335で処置予定) ***/          /*** TODO: OPENSSL1.1.1 ERROR CHECK(ticket#39335で処置予定) ***/
82          if (EVP_CipherInit(c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 ||          if (EVP_CipherInit(c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 ||
83              EVP_CipherInit(c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 ||              EVP_CipherInit(c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 ||
84              EVP_CipherInit(c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) {              EVP_CipherInit(c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) {
85                  EVP_CIPHER_CTX_free(c->k1);                  EVP_CIPHER_CTX_free(c->k1);
86                  EVP_CIPHER_CTX_free(c->k2);                  EVP_CIPHER_CTX_free(c->k2);
87                  EVP_CIPHER_CTX_free(c->k3);                  EVP_CIPHER_CTX_free(c->k3);
88                  SecureZeroMemory(c, sizeof(*c));                  SecureZeroMemory(c, sizeof(*c));
89                  free(c);                  free(c);
90                  EVP_CIPHER_CTX_set_app_data(ctx, NULL);                  EVP_CIPHER_CTX_set_app_data(ctx, NULL);
91                  return 0;                  return 0;
92          }          }
93          return 1;          return 1;
94  }  }
95    
96  static int ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, size_t len)  static int ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, size_t len)
97  {  {
98          struct ssh1_3des_ctx *c;          struct ssh1_3des_ctx *c;
99    
100          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) {          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) {
101                  //error("ssh1_3des_cbc: no context");                  //error("ssh1_3des_cbc: no context");
102                  return 0;                  return 0;
103          }          }
104          if (EVP_Cipher(c->k1, dest, (u_char *)src, len) == 0 ||          if (EVP_Cipher(c->k1, dest, (u_char *)src, len) == 0 ||
105              EVP_Cipher(c->k2, dest, dest, len) == 0 ||              EVP_Cipher(c->k2, dest, dest, len) == 0 ||
106              EVP_Cipher(c->k3, dest, dest, len) == 0)              EVP_Cipher(c->k3, dest, dest, len) == 0)
107                  return 0;                  return 0;
108          return 1;          return 1;
109  }  }
110    
111  static int ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx)  static int ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx)
112  {  {
113          struct ssh1_3des_ctx *c;          struct ssh1_3des_ctx *c;
114    
115          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) {          if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) {
116                  EVP_CIPHER_CTX_free(c->k1);                  EVP_CIPHER_CTX_free(c->k1);
117                  EVP_CIPHER_CTX_free(c->k2);                  EVP_CIPHER_CTX_free(c->k2);
118                  EVP_CIPHER_CTX_free(c->k3);                  EVP_CIPHER_CTX_free(c->k3);
119                  SecureZeroMemory(c, sizeof(*c));                  SecureZeroMemory(c, sizeof(*c));
120                  free(c);                  free(c);
121                  EVP_CIPHER_CTX_set_app_data(ctx, NULL);                  EVP_CIPHER_CTX_set_app_data(ctx, NULL);
122          }          }
123          return 1;          return 1;
124  }  }
125    
126  const EVP_CIPHER *evp_ssh1_3des(void)  const EVP_CIPHER *evp_ssh1_3des(void)
127  {  {
128  #ifndef LIBRESSL_VERSION_NUMBER  #ifndef LIBRESSL_VERSION_NUMBER
129          static EVP_CIPHER *p = NULL;          static EVP_CIPHER *p = NULL;
130    
131          if (p == NULL) {          if (p == NULL) {
132                  p = EVP_CIPHER_meth_new(NID_undef, /*block_size*/8, /*key_len*/16);                  p = EVP_CIPHER_meth_new(NID_undef, /*block_size*/8, /*key_len*/16);
133                  /*** TODO: OPENSSL1.1.1 ERROR CHECK(ticket#39335で処置予定) ***/                  /*** TODO: OPENSSL1.1.1 ERROR CHECK(ticket#39335で処置予定) ***/
134          }          }
135          if (p) {          if (p) {
136                  EVP_CIPHER_meth_set_iv_length(p, 0);                  EVP_CIPHER_meth_set_iv_length(p, 0);
137                  EVP_CIPHER_meth_set_init(p, ssh1_3des_init);                  EVP_CIPHER_meth_set_init(p, ssh1_3des_init);
138                  EVP_CIPHER_meth_set_cleanup(p, ssh1_3des_cleanup);                  EVP_CIPHER_meth_set_cleanup(p, ssh1_3des_cleanup);
139                  EVP_CIPHER_meth_set_do_cipher(p, ssh1_3des_cbc);                  EVP_CIPHER_meth_set_do_cipher(p, ssh1_3des_cbc);
140                  EVP_CIPHER_meth_set_flags(p, EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH);                  EVP_CIPHER_meth_set_flags(p, EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH);
141          }          }
142          return (p);          return (p);
143  #else  #else
144          static EVP_CIPHER ssh1_3des;          static EVP_CIPHER ssh1_3des;
145    
146          memset(&ssh1_3des, 0, sizeof(EVP_CIPHER));          memset(&ssh1_3des, 0, sizeof(EVP_CIPHER));
147          ssh1_3des.nid = NID_undef;          ssh1_3des.nid = NID_undef;
148          ssh1_3des.block_size = 8;          ssh1_3des.block_size = 8;
149          ssh1_3des.iv_len = 0;          ssh1_3des.iv_len = 0;
150          ssh1_3des.key_len = 16;          ssh1_3des.key_len = 16;
151          ssh1_3des.init = ssh1_3des_init;          ssh1_3des.init = ssh1_3des_init;
152          ssh1_3des.cleanup = ssh1_3des_cleanup;          ssh1_3des.cleanup = ssh1_3des_cleanup;
153          ssh1_3des.do_cipher = ssh1_3des_cbc;          ssh1_3des.do_cipher = ssh1_3des_cbc;
154          ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH;          ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH;
155          return (&ssh1_3des);          return (&ssh1_3des);
156  #endif  #endif
157  }  }
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