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ssl_ciph.c
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1 /* ssl/ssl_ciph.c */
2 /* Copyright (C) 1995-1998 Eric Young ([email protected])
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young ([email protected]).
7  * The implementation was written so as to conform with Netscapes SSL.
8  *
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to. The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson ([email protected]).
15  *
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  *
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  * notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  * notice, this list of conditions and the following disclaimer in the
30  * documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  * must display the following acknowledgement:
33  * "This product includes cryptographic software written by
34  * Eric Young ([email protected])"
35  * The word 'cryptographic' can be left out if the rouines from the library
36  * being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from
38  * the apps directory (application code) you must include an acknowledgement:
39  * "This product includes software written by Tim Hudson ([email protected])"
40  *
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  *
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed. i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 /* ====================================================================
59  * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  * notice, this list of conditions and the following disclaimer.
67  *
68  * 2. Redistributions in binary form must reproduce the above copyright
69  * notice, this list of conditions and the following disclaimer in
70  * the documentation and/or other materials provided with the
71  * distribution.
72  *
73  * 3. All advertising materials mentioning features or use of this
74  * software must display the following acknowledgment:
75  * "This product includes software developed by the OpenSSL Project
76  * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77  *
78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79  * endorse or promote products derived from this software without
80  * prior written permission. For written permission, please contact
81  * [email protected].
82  *
83  * 5. Products derived from this software may not be called "OpenSSL"
84  * nor may "OpenSSL" appear in their names without prior written
85  * permission of the OpenSSL Project.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  * acknowledgment:
89  * "This product includes software developed by the OpenSSL Project
90  * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103  * OF THE POSSIBILITY OF SUCH DAMAGE.
104  * ====================================================================
105  *
106  * This product includes cryptographic software written by Eric Young
107  * ([email protected]). This product includes software written by Tim
108  * Hudson ([email protected]).
109  *
110  */
111 /* ====================================================================
112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113  * ECC cipher suite support in OpenSSL originally developed by
114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115  */
116 /* ====================================================================
117  * Copyright 2005 Nokia. All rights reserved.
118  *
119  * The portions of the attached software ("Contribution") is developed by
120  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
121  * license.
122  *
123  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
124  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
125  * support (see RFC 4279) to OpenSSL.
126  *
127  * No patent licenses or other rights except those expressly stated in
128  * the OpenSSL open source license shall be deemed granted or received
129  * expressly, by implication, estoppel, or otherwise.
130  *
131  * No assurances are provided by Nokia that the Contribution does not
132  * infringe the patent or other intellectual property rights of any third
133  * party or that the license provides you with all the necessary rights
134  * to make use of the Contribution.
135  *
136  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
137  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
138  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
139  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
140  * OTHERWISE.
141  */
142 
143 #include <stdio.h>
144 #include <openssl/objects.h>
145 #ifndef OPENSSL_NO_COMP
146 #include <openssl/comp.h>
147 #endif
148 #ifndef OPENSSL_NO_ENGINE
149 #include <openssl/engine.h>
150 #endif
151 #include "ssl_locl.h"
152 
153 #define SSL_ENC_DES_IDX 0
154 #define SSL_ENC_3DES_IDX 1
155 #define SSL_ENC_RC4_IDX 2
156 #define SSL_ENC_RC2_IDX 3
157 #define SSL_ENC_IDEA_IDX 4
158 #define SSL_ENC_NULL_IDX 5
159 #define SSL_ENC_AES128_IDX 6
160 #define SSL_ENC_AES256_IDX 7
161 #define SSL_ENC_CAMELLIA128_IDX 8
162 #define SSL_ENC_CAMELLIA256_IDX 9
163 #define SSL_ENC_GOST89_IDX 10
164 #define SSL_ENC_SEED_IDX 11
165 #define SSL_ENC_AES128GCM_IDX 12
166 #define SSL_ENC_AES256GCM_IDX 13
167 #define SSL_ENC_NUM_IDX 14
168 
169 
170 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
171  NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
172  };
173 
174 #define SSL_COMP_NULL_IDX 0
175 #define SSL_COMP_ZLIB_IDX 1
176 #define SSL_COMP_NUM_IDX 2
177 
178 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
179 
180 #define SSL_MD_MD5_IDX 0
181 #define SSL_MD_SHA1_IDX 1
182 #define SSL_MD_GOST94_IDX 2
183 #define SSL_MD_GOST89MAC_IDX 3
184 #define SSL_MD_SHA256_IDX 4
185 #define SSL_MD_SHA384_IDX 5
186 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
187  * defined in the
188  * ssl_locl.h */
189 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
190 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
191  NULL,NULL,NULL,NULL,NULL,NULL
192  };
193 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
194  * implementation is engine-provided, we'll fill it only if
195  * corresponding EVP_PKEY_METHOD is found
196  */
197 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
198  EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,
199  EVP_PKEY_HMAC,EVP_PKEY_HMAC
200  };
201 
202 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
203  0,0,0,0,0,0
204  };
205 
206 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
207  SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
208  SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
209  SSL_HANDSHAKE_MAC_SHA384
210  };
211 
212 #define CIPHER_ADD 1
213 #define CIPHER_KILL 2
214 #define CIPHER_DEL 3
215 #define CIPHER_ORD 4
216 #define CIPHER_SPECIAL 5
217 
218 typedef struct cipher_order_st
219  {
220  const SSL_CIPHER *cipher;
221  int active;
222  int dead;
223  struct cipher_order_st *next,*prev;
224  } CIPHER_ORDER;
225 
226 static const SSL_CIPHER cipher_aliases[]={
227  /* "ALL" doesn't include eNULL (must be specifically enabled) */
228  {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0},
229  /* "COMPLEMENTOFALL" */
230  {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0},
231 
232  /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
233  {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
234 
235  /* key exchange aliases
236  * (some of those using only a single bit here combine
237  * multiple key exchange algs according to the RFCs,
238  * e.g. kEDH combines DHE_DSS and DHE_RSA) */
239  {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0},
240 
241  {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
242  {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
243  {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
244  {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0},
245  {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
246 
247  {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0},
248 
249  {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0},
250  {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0},
251  {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
252  {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0},
253  {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
254 
255  {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0},
256  {0,SSL_TXT_kSRP,0, SSL_kSRP, 0,0,0,0,0,0,0,0},
257  {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
258 
259  /* server authentication aliases */
260  {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0},
261  {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
262  {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
263  {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0},
264  {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0},
265  {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
266  {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0},
267  {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0},
268  {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0},
269  {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0},
270  {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
271  {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
272  {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
273 
274  /* aliases combining key exchange and server authentication */
275  {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
276  {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
277  {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
278  {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
279  {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
280  {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
281  {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
282  {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
283  {0,SSL_TXT_SRP,0, SSL_kSRP,0,0,0,0,0,0,0,0},
284 
285 
286  /* symmetric encryption aliases */
287  {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0},
288  {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0},
289  {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0},
290  {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0},
291  {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0},
292  {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0},
293  {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
294  {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
295  {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
296  {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0},
297  {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
298  {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
299  {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
300  {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
301 
302  /* MAC aliases */
303  {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0},
304  {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
305  {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
306  {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0},
307  {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0},
308  {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0},
309  {0,SSL_TXT_SHA384,0, 0,0,0,SSL_SHA384, 0,0,0,0,0},
310 
311  /* protocol version aliases */
312  {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0},
313  {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0},
314  {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0},
315 
316  /* export flag */
317  {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
318  {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
319 
320  /* strength classes */
321  {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0},
322  {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0},
323  {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0},
324  {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0},
325  {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0},
326  /* FIPS 140-2 approved ciphersuite */
327  {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0},
328  };
329 /* Search for public key algorithm with given name and
330  * return its pkey_id if it is available. Otherwise return 0
331  */
332 #ifdef OPENSSL_NO_ENGINE
333 
334 static int get_optional_pkey_id(const char *pkey_name)
335  {
336  const EVP_PKEY_ASN1_METHOD *ameth;
337  int pkey_id=0;
338  ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
339  if (ameth)
340  {
341  EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
342  }
343  return pkey_id;
344  }
345 
346 #else
347 
348 static int get_optional_pkey_id(const char *pkey_name)
349  {
350  const EVP_PKEY_ASN1_METHOD *ameth;
351  ENGINE *tmpeng = NULL;
352  int pkey_id=0;
353  ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
354  if (ameth)
355  {
356  EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
357  }
358  if (tmpeng) ENGINE_finish(tmpeng);
359  return pkey_id;
360  }
361 
362 #endif
363 
364 void ssl_load_ciphers(void)
365  {
366  ssl_cipher_methods[SSL_ENC_DES_IDX]=
367  EVP_get_cipherbyname(SN_des_cbc);
368  ssl_cipher_methods[SSL_ENC_3DES_IDX]=
369  EVP_get_cipherbyname(SN_des_ede3_cbc);
370  ssl_cipher_methods[SSL_ENC_RC4_IDX]=
371  EVP_get_cipherbyname(SN_rc4);
372  ssl_cipher_methods[SSL_ENC_RC2_IDX]=
373  EVP_get_cipherbyname(SN_rc2_cbc);
374 #ifndef OPENSSL_NO_IDEA
375  ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
376  EVP_get_cipherbyname(SN_idea_cbc);
377 #else
378  ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
379 #endif
380  ssl_cipher_methods[SSL_ENC_AES128_IDX]=
381  EVP_get_cipherbyname(SN_aes_128_cbc);
382  ssl_cipher_methods[SSL_ENC_AES256_IDX]=
383  EVP_get_cipherbyname(SN_aes_256_cbc);
384  ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
385  EVP_get_cipherbyname(SN_camellia_128_cbc);
386  ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
387  EVP_get_cipherbyname(SN_camellia_256_cbc);
388  ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
389  EVP_get_cipherbyname(SN_gost89_cnt);
390  ssl_cipher_methods[SSL_ENC_SEED_IDX]=
391  EVP_get_cipherbyname(SN_seed_cbc);
392 
393  ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
394  EVP_get_cipherbyname(SN_aes_128_gcm);
395  ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
396  EVP_get_cipherbyname(SN_aes_256_gcm);
397 
398  ssl_digest_methods[SSL_MD_MD5_IDX]=
399  EVP_get_digestbyname(SN_md5);
400  ssl_mac_secret_size[SSL_MD_MD5_IDX]=
401  EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
402  OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
403  ssl_digest_methods[SSL_MD_SHA1_IDX]=
404  EVP_get_digestbyname(SN_sha1);
405  ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
406  EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
407  OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
408  ssl_digest_methods[SSL_MD_GOST94_IDX]=
409  EVP_get_digestbyname(SN_id_GostR3411_94);
410  if (ssl_digest_methods[SSL_MD_GOST94_IDX])
411  {
412  ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
413  EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
414  OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
415  }
416  ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
417  EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
418  ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
419  if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
420  ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
421  }
422 
423  ssl_digest_methods[SSL_MD_SHA256_IDX]=
424  EVP_get_digestbyname(SN_sha256);
425  ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
426  EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
427  ssl_digest_methods[SSL_MD_SHA384_IDX]=
428  EVP_get_digestbyname(SN_sha384);
429  ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
430  EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
431  }
432 #ifndef OPENSSL_NO_COMP
433 
434 static int sk_comp_cmp(const SSL_COMP * const *a,
435  const SSL_COMP * const *b)
436  {
437  return((*a)->id-(*b)->id);
438  }
439 
440 static void load_builtin_compressions(void)
441  {
442  int got_write_lock = 0;
443 
444  CRYPTO_r_lock(CRYPTO_LOCK_SSL);
445  if (ssl_comp_methods == NULL)
446  {
447  CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
448  CRYPTO_w_lock(CRYPTO_LOCK_SSL);
449  got_write_lock = 1;
450 
451  if (ssl_comp_methods == NULL)
452  {
453  SSL_COMP *comp = NULL;
454 
455  MemCheck_off();
456  ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
457  if (ssl_comp_methods != NULL)
458  {
459  comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
460  if (comp != NULL)
461  {
462  comp->method=COMP_zlib();
463  if (comp->method
464  && comp->method->type == NID_undef)
465  OPENSSL_free(comp);
466  else
467  {
468  comp->id=SSL_COMP_ZLIB_IDX;
469  comp->name=comp->method->name;
470  sk_SSL_COMP_push(ssl_comp_methods,comp);
471  }
472  }
473  sk_SSL_COMP_sort(ssl_comp_methods);
474  }
475  MemCheck_on();
476  }
477  }
478 
479  if (got_write_lock)
480  CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
481  else
482  CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
483  }
484 #endif
485 
486 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
487  const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
488  {
489  int i;
490  const SSL_CIPHER *c;
491 
492  c=s->cipher;
493  if (c == NULL) return(0);
494  if (comp != NULL)
495  {
496  SSL_COMP ctmp;
497 #ifndef OPENSSL_NO_COMP
498  load_builtin_compressions();
499 #endif
500 
501  *comp=NULL;
502  ctmp.id=s->compress_meth;
503  if (ssl_comp_methods != NULL)
504  {
505  i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
506  if (i >= 0)
507  *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
508  else
509  *comp=NULL;
510  }
511  }
512 
513  if ((enc == NULL) || (md == NULL)) return(0);
514 
515  switch (c->algorithm_enc)
516  {
517  case SSL_DES:
518  i=SSL_ENC_DES_IDX;
519  break;
520  case SSL_3DES:
521  i=SSL_ENC_3DES_IDX;
522  break;
523  case SSL_RC4:
524  i=SSL_ENC_RC4_IDX;
525  break;
526  case SSL_RC2:
527  i=SSL_ENC_RC2_IDX;
528  break;
529  case SSL_IDEA:
530  i=SSL_ENC_IDEA_IDX;
531  break;
532  case SSL_eNULL:
533  i=SSL_ENC_NULL_IDX;
534  break;
535  case SSL_AES128:
536  i=SSL_ENC_AES128_IDX;
537  break;
538  case SSL_AES256:
539  i=SSL_ENC_AES256_IDX;
540  break;
541  case SSL_CAMELLIA128:
542  i=SSL_ENC_CAMELLIA128_IDX;
543  break;
544  case SSL_CAMELLIA256:
545  i=SSL_ENC_CAMELLIA256_IDX;
546  break;
547  case SSL_eGOST2814789CNT:
548  i=SSL_ENC_GOST89_IDX;
549  break;
550  case SSL_SEED:
551  i=SSL_ENC_SEED_IDX;
552  break;
553  case SSL_AES128GCM:
554  i=SSL_ENC_AES128GCM_IDX;
555  break;
556  case SSL_AES256GCM:
557  i=SSL_ENC_AES256GCM_IDX;
558  break;
559  default:
560  i= -1;
561  break;
562  }
563 
564  if ((i < 0) || (i > SSL_ENC_NUM_IDX))
565  *enc=NULL;
566  else
567  {
568  if (i == SSL_ENC_NULL_IDX)
569  *enc=EVP_enc_null();
570  else
571  *enc=ssl_cipher_methods[i];
572  }
573 
574  switch (c->algorithm_mac)
575  {
576  case SSL_MD5:
577  i=SSL_MD_MD5_IDX;
578  break;
579  case SSL_SHA1:
580  i=SSL_MD_SHA1_IDX;
581  break;
582  case SSL_SHA256:
583  i=SSL_MD_SHA256_IDX;
584  break;
585  case SSL_SHA384:
586  i=SSL_MD_SHA384_IDX;
587  break;
588  case SSL_GOST94:
589  i = SSL_MD_GOST94_IDX;
590  break;
591  case SSL_GOST89MAC:
592  i = SSL_MD_GOST89MAC_IDX;
593  break;
594  default:
595  i= -1;
596  break;
597  }
598  if ((i < 0) || (i > SSL_MD_NUM_IDX))
599  {
600  *md=NULL;
601  if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
602  if (mac_secret_size!=NULL) *mac_secret_size = 0;
603  if (c->algorithm_mac == SSL_AEAD)
604  mac_pkey_type = NULL;
605  }
606  else
607  {
608  *md=ssl_digest_methods[i];
609  if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
610  if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
611  }
612 
613  if ((*enc != NULL) &&
614  (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
615  (!mac_pkey_type||*mac_pkey_type != NID_undef))
616  {
617  const EVP_CIPHER *evp;
618 
619  if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
620  s->ssl_version < TLS1_VERSION)
621  return 1;
622 
623 #ifdef OPENSSL_FIPS
624  if (FIPS_mode())
625  return 1;
626 #endif
627 
628  if (c->algorithm_enc == SSL_RC4 &&
629  c->algorithm_mac == SSL_MD5 &&
630  (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
631  *enc = evp, *md = NULL;
632  else if (c->algorithm_enc == SSL_AES128 &&
633  c->algorithm_mac == SSL_SHA1 &&
634  (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
635  *enc = evp, *md = NULL;
636  else if (c->algorithm_enc == SSL_AES256 &&
637  c->algorithm_mac == SSL_SHA1 &&
638  (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
639  *enc = evp, *md = NULL;
640  return(1);
641  }
642  else
643  return(0);
644  }
645 
646 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
647 {
648  if (idx <0||idx>=SSL_MD_NUM_IDX)
649  {
650  return 0;
651  }
652  *mask = ssl_handshake_digest_flag[idx];
653  if (*mask)
654  *md = ssl_digest_methods[idx];
655  else
656  *md = NULL;
657  return 1;
658 }
659 
660 #define ITEM_SEP(a) \
661  (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
662 
663 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
664  CIPHER_ORDER **tail)
665  {
666  if (curr == *tail) return;
667  if (curr == *head)
668  *head=curr->next;
669  if (curr->prev != NULL)
670  curr->prev->next=curr->next;
671  if (curr->next != NULL)
672  curr->next->prev=curr->prev;
673  (*tail)->next=curr;
674  curr->prev= *tail;
675  curr->next=NULL;
676  *tail=curr;
677  }
678 
679 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
680  CIPHER_ORDER **tail)
681  {
682  if (curr == *head) return;
683  if (curr == *tail)
684  *tail=curr->prev;
685  if (curr->next != NULL)
686  curr->next->prev=curr->prev;
687  if (curr->prev != NULL)
688  curr->prev->next=curr->next;
689  (*head)->prev=curr;
690  curr->next= *head;
691  curr->prev=NULL;
692  *head=curr;
693  }
694 
695 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
696  {
697  *mkey = 0;
698  *auth = 0;
699  *enc = 0;
700  *mac = 0;
701  *ssl = 0;
702 
703 #ifdef OPENSSL_NO_RSA
704  *mkey |= SSL_kRSA;
705  *auth |= SSL_aRSA;
706 #endif
707 #ifdef OPENSSL_NO_DSA
708  *auth |= SSL_aDSS;
709 #endif
710  *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
711  *auth |= SSL_aDH;
712 #ifdef OPENSSL_NO_DH
713  *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
714  *auth |= SSL_aDH;
715 #endif
716 #ifdef OPENSSL_NO_KRB5
717  *mkey |= SSL_kKRB5;
718  *auth |= SSL_aKRB5;
719 #endif
720 #ifdef OPENSSL_NO_ECDSA
721  *auth |= SSL_aECDSA;
722 #endif
723 #ifdef OPENSSL_NO_ECDH
724  *mkey |= SSL_kECDHe|SSL_kECDHr;
725  *auth |= SSL_aECDH;
726 #endif
727 #ifdef OPENSSL_NO_PSK
728  *mkey |= SSL_kPSK;
729  *auth |= SSL_aPSK;
730 #endif
731 #ifdef OPENSSL_NO_SRP
732  *mkey |= SSL_kSRP;
733 #endif
734  /* Check for presence of GOST 34.10 algorithms, and if they
735  * do not present, disable appropriate auth and key exchange */
736  if (!get_optional_pkey_id("gost94")) {
737  *auth |= SSL_aGOST94;
738  }
739  if (!get_optional_pkey_id("gost2001")) {
740  *auth |= SSL_aGOST01;
741  }
742  /* Disable GOST key exchange if no GOST signature algs are available * */
743  if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
744  *mkey |= SSL_kGOST;
745  }
746 #ifdef SSL_FORBID_ENULL
747  *enc |= SSL_eNULL;
748 #endif
749 
750 
751 
752  *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
753  *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
754  *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
755  *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
756  *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
757  *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
758  *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
759  *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
760  *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
761  *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
762  *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
763  *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
764  *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
765 
766  *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
767  *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
768  *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
769  *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
770  *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
771  *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
772 
773  }
774 
775 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
776  int num_of_ciphers,
777  unsigned long disabled_mkey, unsigned long disabled_auth,
778  unsigned long disabled_enc, unsigned long disabled_mac,
779  unsigned long disabled_ssl,
780  CIPHER_ORDER *co_list,
781  CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
782  {
783  int i, co_list_num;
784  const SSL_CIPHER *c;
785 
786  /*
787  * We have num_of_ciphers descriptions compiled in, depending on the
788  * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
789  * These will later be sorted in a linked list with at most num
790  * entries.
791  */
792 
793  /* Get the initial list of ciphers */
794  co_list_num = 0; /* actual count of ciphers */
795  for (i = 0; i < num_of_ciphers; i++)
796  {
797  c = ssl_method->get_cipher(i);
798  /* drop those that use any of that is not available */
799  if ((c != NULL) && c->valid &&
800 #ifdef OPENSSL_FIPS
801  (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
802 #endif
803  !(c->algorithm_mkey & disabled_mkey) &&
804  !(c->algorithm_auth & disabled_auth) &&
805  !(c->algorithm_enc & disabled_enc) &&
806  !(c->algorithm_mac & disabled_mac) &&
807  !(c->algorithm_ssl & disabled_ssl))
808  {
809  co_list[co_list_num].cipher = c;
810  co_list[co_list_num].next = NULL;
811  co_list[co_list_num].prev = NULL;
812  co_list[co_list_num].active = 0;
813  co_list_num++;
814 #ifdef KSSL_DEBUG
815  printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
816 #endif /* KSSL_DEBUG */
817  /*
818  if (!sk_push(ca_list,(char *)c)) goto err;
819  */
820  }
821  }
822 
823  /*
824  * Prepare linked list from list entries
825  */
826  if (co_list_num > 0)
827  {
828  co_list[0].prev = NULL;
829 
830  if (co_list_num > 1)
831  {
832  co_list[0].next = &co_list[1];
833 
834  for (i = 1; i < co_list_num - 1; i++)
835  {
836  co_list[i].prev = &co_list[i - 1];
837  co_list[i].next = &co_list[i + 1];
838  }
839 
840  co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
841  }
842 
843  co_list[co_list_num - 1].next = NULL;
844 
845  *head_p = &co_list[0];
846  *tail_p = &co_list[co_list_num - 1];
847  }
848  }
849 
850 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
851  int num_of_group_aliases,
852  unsigned long disabled_mkey, unsigned long disabled_auth,
853  unsigned long disabled_enc, unsigned long disabled_mac,
854  unsigned long disabled_ssl,
855  CIPHER_ORDER *head)
856  {
857  CIPHER_ORDER *ciph_curr;
858  const SSL_CIPHER **ca_curr;
859  int i;
860  unsigned long mask_mkey = ~disabled_mkey;
861  unsigned long mask_auth = ~disabled_auth;
862  unsigned long mask_enc = ~disabled_enc;
863  unsigned long mask_mac = ~disabled_mac;
864  unsigned long mask_ssl = ~disabled_ssl;
865 
866  /*
867  * First, add the real ciphers as already collected
868  */
869  ciph_curr = head;
870  ca_curr = ca_list;
871  while (ciph_curr != NULL)
872  {
873  *ca_curr = ciph_curr->cipher;
874  ca_curr++;
875  ciph_curr = ciph_curr->next;
876  }
877 
878  /*
879  * Now we add the available ones from the cipher_aliases[] table.
880  * They represent either one or more algorithms, some of which
881  * in any affected category must be supported (set in enabled_mask),
882  * or represent a cipher strength value (will be added in any case because algorithms=0).
883  */
884  for (i = 0; i < num_of_group_aliases; i++)
885  {
886  unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
887  unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
888  unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
889  unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
890  unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
891 
892  if (algorithm_mkey)
893  if ((algorithm_mkey & mask_mkey) == 0)
894  continue;
895 
896  if (algorithm_auth)
897  if ((algorithm_auth & mask_auth) == 0)
898  continue;
899 
900  if (algorithm_enc)
901  if ((algorithm_enc & mask_enc) == 0)
902  continue;
903 
904  if (algorithm_mac)
905  if ((algorithm_mac & mask_mac) == 0)
906  continue;
907 
908  if (algorithm_ssl)
909  if ((algorithm_ssl & mask_ssl) == 0)
910  continue;
911 
912  *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
913  ca_curr++;
914  }
915 
916  *ca_curr = NULL; /* end of list */
917  }
918 
919 static void ssl_cipher_apply_rule(unsigned long cipher_id,
920  unsigned long alg_mkey, unsigned long alg_auth,
921  unsigned long alg_enc, unsigned long alg_mac,
922  unsigned long alg_ssl,
923  unsigned long algo_strength,
924  int rule, int strength_bits,
925  CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
926  {
927  CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
928  const SSL_CIPHER *cp;
929  int reverse = 0;
930 
931 #ifdef CIPHER_DEBUG
932  printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
933  rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
934 #endif
935 
936  if (rule == CIPHER_DEL)
937  reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
938 
939  head = *head_p;
940  tail = *tail_p;
941 
942  if (reverse)
943  {
944  curr = tail;
945  last = head;
946  }
947  else
948  {
949  curr = head;
950  last = tail;
951  }
952 
953  curr2 = curr;
954  for (;;)
955  {
956  if ((curr == NULL) || (curr == last)) break;
957  curr = curr2;
958  curr2 = reverse ? curr->prev : curr->next;
959 
960  cp = curr->cipher;
961 
962  /*
963  * Selection criteria is either the value of strength_bits
964  * or the algorithms used.
965  */
966  if (strength_bits >= 0)
967  {
968  if (strength_bits != cp->strength_bits)
969  continue;
970  }
971  else
972  {
973 #ifdef CIPHER_DEBUG
974  printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
975 #endif
976 
977  if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
978  continue;
979  if (alg_auth && !(alg_auth & cp->algorithm_auth))
980  continue;
981  if (alg_enc && !(alg_enc & cp->algorithm_enc))
982  continue;
983  if (alg_mac && !(alg_mac & cp->algorithm_mac))
984  continue;
985  if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
986  continue;
987  if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
988  continue;
989  if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
990  continue;
991  }
992 
993 #ifdef CIPHER_DEBUG
994  printf("Action = %d\n", rule);
995 #endif
996 
997  /* add the cipher if it has not been added yet. */
998  if (rule == CIPHER_ADD)
999  {
1000  /* reverse == 0 */
1001  if (!curr->active)
1002  {
1003  ll_append_tail(&head, curr, &tail);
1004  curr->active = 1;
1005  }
1006  }
1007  /* Move the added cipher to this location */
1008  else if (rule == CIPHER_ORD)
1009  {
1010  /* reverse == 0 */
1011  if (curr->active)
1012  {
1013  ll_append_tail(&head, curr, &tail);
1014  }
1015  }
1016  else if (rule == CIPHER_DEL)
1017  {
1018  /* reverse == 1 */
1019  if (curr->active)
1020  {
1021  /* most recently deleted ciphersuites get best positions
1022  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1023  * works in reverse to maintain the order) */
1024  ll_append_head(&head, curr, &tail);
1025  curr->active = 0;
1026  }
1027  }
1028  else if (rule == CIPHER_KILL)
1029  {
1030  /* reverse == 0 */
1031  if (head == curr)
1032  head = curr->next;
1033  else
1034  curr->prev->next = curr->next;
1035  if (tail == curr)
1036  tail = curr->prev;
1037  curr->active = 0;
1038  if (curr->next != NULL)
1039  curr->next->prev = curr->prev;
1040  if (curr->prev != NULL)
1041  curr->prev->next = curr->next;
1042  curr->next = NULL;
1043  curr->prev = NULL;
1044  }
1045  }
1046 
1047  *head_p = head;
1048  *tail_p = tail;
1049  }
1050 
1051 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1052  CIPHER_ORDER **tail_p)
1053  {
1054  int max_strength_bits, i, *number_uses;
1055  CIPHER_ORDER *curr;
1056 
1057  /*
1058  * This routine sorts the ciphers with descending strength. The sorting
1059  * must keep the pre-sorted sequence, so we apply the normal sorting
1060  * routine as '+' movement to the end of the list.
1061  */
1062  max_strength_bits = 0;
1063  curr = *head_p;
1064  while (curr != NULL)
1065  {
1066  if (curr->active &&
1067  (curr->cipher->strength_bits > max_strength_bits))
1068  max_strength_bits = curr->cipher->strength_bits;
1069  curr = curr->next;
1070  }
1071 
1072  number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1073  if (!number_uses)
1074  {
1075  SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1076  return(0);
1077  }
1078  memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1079 
1080  /*
1081  * Now find the strength_bits values actually used
1082  */
1083  curr = *head_p;
1084  while (curr != NULL)
1085  {
1086  if (curr->active)
1087  number_uses[curr->cipher->strength_bits]++;
1088  curr = curr->next;
1089  }
1090  /*
1091  * Go through the list of used strength_bits values in descending
1092  * order.
1093  */
1094  for (i = max_strength_bits; i >= 0; i--)
1095  if (number_uses[i] > 0)
1096  ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1097 
1098  OPENSSL_free(number_uses);
1099  return(1);
1100  }
1101 
1102 static int ssl_cipher_process_rulestr(const char *rule_str,
1103  CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1104  const SSL_CIPHER **ca_list)
1105  {
1106  unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1107  const char *l, *buf;
1108  int j, multi, found, rule, retval, ok, buflen;
1109  unsigned long cipher_id = 0;
1110  char ch;
1111 
1112  retval = 1;
1113  l = rule_str;
1114  for (;;)
1115  {
1116  ch = *l;
1117 
1118  if (ch == '\0')
1119  break; /* done */
1120  if (ch == '-')
1121  { rule = CIPHER_DEL; l++; }
1122  else if (ch == '+')
1123  { rule = CIPHER_ORD; l++; }
1124  else if (ch == '!')
1125  { rule = CIPHER_KILL; l++; }
1126  else if (ch == '@')
1127  { rule = CIPHER_SPECIAL; l++; }
1128  else
1129  { rule = CIPHER_ADD; }
1130 
1131  if (ITEM_SEP(ch))
1132  {
1133  l++;
1134  continue;
1135  }
1136 
1137  alg_mkey = 0;
1138  alg_auth = 0;
1139  alg_enc = 0;
1140  alg_mac = 0;
1141  alg_ssl = 0;
1142  algo_strength = 0;
1143 
1144  for (;;)
1145  {
1146  ch = *l;
1147  buf = l;
1148  buflen = 0;
1149 #ifndef CHARSET_EBCDIC
1150  while ( ((ch >= 'A') && (ch <= 'Z')) ||
1151  ((ch >= '0') && (ch <= '9')) ||
1152  ((ch >= 'a') && (ch <= 'z')) ||
1153  (ch == '-'))
1154 #else
1155  while ( isalnum(ch) || (ch == '-'))
1156 #endif
1157  {
1158  ch = *(++l);
1159  buflen++;
1160  }
1161 
1162  if (buflen == 0)
1163  {
1164  /*
1165  * We hit something we cannot deal with,
1166  * it is no command or separator nor
1167  * alphanumeric, so we call this an error.
1168  */
1169  SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1170  SSL_R_INVALID_COMMAND);
1171  retval = found = 0;
1172  l++;
1173  break;
1174  }
1175 
1176  if (rule == CIPHER_SPECIAL)
1177  {
1178  found = 0; /* unused -- avoid compiler warning */
1179  break; /* special treatment */
1180  }
1181 
1182  /* check for multi-part specification */
1183  if (ch == '+')
1184  {
1185  multi=1;
1186  l++;
1187  }
1188  else
1189  multi=0;
1190 
1191  /*
1192  * Now search for the cipher alias in the ca_list. Be careful
1193  * with the strncmp, because the "buflen" limitation
1194  * will make the rule "ADH:SOME" and the cipher
1195  * "ADH-MY-CIPHER" look like a match for buflen=3.
1196  * So additionally check whether the cipher name found
1197  * has the correct length. We can save a strlen() call:
1198  * just checking for the '\0' at the right place is
1199  * sufficient, we have to strncmp() anyway. (We cannot
1200  * use strcmp(), because buf is not '\0' terminated.)
1201  */
1202  j = found = 0;
1203  cipher_id = 0;
1204  while (ca_list[j])
1205  {
1206  if (!strncmp(buf, ca_list[j]->name, buflen) &&
1207  (ca_list[j]->name[buflen] == '\0'))
1208  {
1209  found = 1;
1210  break;
1211  }
1212  else
1213  j++;
1214  }
1215 
1216  if (!found)
1217  break; /* ignore this entry */
1218 
1219  if (ca_list[j]->algorithm_mkey)
1220  {
1221  if (alg_mkey)
1222  {
1223  alg_mkey &= ca_list[j]->algorithm_mkey;
1224  if (!alg_mkey) { found = 0; break; }
1225  }
1226  else
1227  alg_mkey = ca_list[j]->algorithm_mkey;
1228  }
1229 
1230  if (ca_list[j]->algorithm_auth)
1231  {
1232  if (alg_auth)
1233  {
1234  alg_auth &= ca_list[j]->algorithm_auth;
1235  if (!alg_auth) { found = 0; break; }
1236  }
1237  else
1238  alg_auth = ca_list[j]->algorithm_auth;
1239  }
1240 
1241  if (ca_list[j]->algorithm_enc)
1242  {
1243  if (alg_enc)
1244  {
1245  alg_enc &= ca_list[j]->algorithm_enc;
1246  if (!alg_enc) { found = 0; break; }
1247  }
1248  else
1249  alg_enc = ca_list[j]->algorithm_enc;
1250  }
1251 
1252  if (ca_list[j]->algorithm_mac)
1253  {
1254  if (alg_mac)
1255  {
1256  alg_mac &= ca_list[j]->algorithm_mac;
1257  if (!alg_mac) { found = 0; break; }
1258  }
1259  else
1260  alg_mac = ca_list[j]->algorithm_mac;
1261  }
1262 
1263  if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1264  {
1265  if (algo_strength & SSL_EXP_MASK)
1266  {
1267  algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1268  if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1269  }
1270  else
1271  algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1272  }
1273 
1274  if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1275  {
1276  if (algo_strength & SSL_STRONG_MASK)
1277  {
1278  algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1279  if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1280  }
1281  else
1282  algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1283  }
1284 
1285  if (ca_list[j]->valid)
1286  {
1287  /* explicit ciphersuite found; its protocol version
1288  * does not become part of the search pattern!*/
1289 
1290  cipher_id = ca_list[j]->id;
1291  }
1292  else
1293  {
1294  /* not an explicit ciphersuite; only in this case, the
1295  * protocol version is considered part of the search pattern */
1296 
1297  if (ca_list[j]->algorithm_ssl)
1298  {
1299  if (alg_ssl)
1300  {
1301  alg_ssl &= ca_list[j]->algorithm_ssl;
1302  if (!alg_ssl) { found = 0; break; }
1303  }
1304  else
1305  alg_ssl = ca_list[j]->algorithm_ssl;
1306  }
1307  }
1308 
1309  if (!multi) break;
1310  }
1311 
1312  /*
1313  * Ok, we have the rule, now apply it
1314  */
1315  if (rule == CIPHER_SPECIAL)
1316  { /* special command */
1317  ok = 0;
1318  if ((buflen == 8) &&
1319  !strncmp(buf, "STRENGTH", 8))
1320  ok = ssl_cipher_strength_sort(head_p, tail_p);
1321  else
1322  SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1323  SSL_R_INVALID_COMMAND);
1324  if (ok == 0)
1325  retval = 0;
1326  /*
1327  * We do not support any "multi" options
1328  * together with "@", so throw away the
1329  * rest of the command, if any left, until
1330  * end or ':' is found.
1331  */
1332  while ((*l != '\0') && !ITEM_SEP(*l))
1333  l++;
1334  }
1335  else if (found)
1336  {
1337  ssl_cipher_apply_rule(cipher_id,
1338  alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1339  rule, -1, head_p, tail_p);
1340  }
1341  else
1342  {
1343  while ((*l != '\0') && !ITEM_SEP(*l))
1344  l++;
1345  }
1346  if (*l == '\0') break; /* done */
1347  }
1348 
1349  return(retval);
1350  }
1351 
1352 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1353  STACK_OF(SSL_CIPHER) **cipher_list,
1354  STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1355  const char *rule_str)
1356  {
1357  int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1358  unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1359  STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1360  const char *rule_p;
1361  CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1362  const SSL_CIPHER **ca_list = NULL;
1363 
1364  /*
1365  * Return with error if nothing to do.
1366  */
1367  if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1368  return NULL;
1369 
1370  /*
1371  * To reduce the work to do we only want to process the compiled
1372  * in algorithms, so we first get the mask of disabled ciphers.
1373  */
1374  ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1375 
1376  /*
1377  * Now we have to collect the available ciphers from the compiled
1378  * in ciphers. We cannot get more than the number compiled in, so
1379  * it is used for allocation.
1380  */
1381  num_of_ciphers = ssl_method->num_ciphers();
1382 #ifdef KSSL_DEBUG
1383  printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1384 #endif /* KSSL_DEBUG */
1385  co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1386  if (co_list == NULL)
1387  {
1388  SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1389  return(NULL); /* Failure */
1390  }
1391 
1392  ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1393  disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1394  co_list, &head, &tail);
1395 
1396 
1397  /* Now arrange all ciphers by preference: */
1398 
1399  /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1400  ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1401  ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1402 
1403  /* AES is our preferred symmetric cipher */
1404  ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1405 
1406  /* Temporarily enable everything else for sorting */
1407  ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1408 
1409  /* Low priority for MD5 */
1410  ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1411 
1412  /* Move anonymous ciphers to the end. Usually, these will remain disabled.
1413  * (For applications that allow them, they aren't too bad, but we prefer
1414  * authenticated ciphers.) */
1415  ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1416 
1417  /* Move ciphers without forward secrecy to the end */
1418  ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1419  /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1420  ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1421  ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1422  ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1423 
1424  /* RC4 is sort-of broken -- move the the end */
1425  ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1426 
1427  /* Now sort by symmetric encryption strength. The above ordering remains
1428  * in force within each class */
1429  if (!ssl_cipher_strength_sort(&head, &tail))
1430  {
1431  OPENSSL_free(co_list);
1432  return NULL;
1433  }
1434 
1435  /* Now disable everything (maintaining the ordering!) */
1436  ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1437 
1438 
1439  /*
1440  * We also need cipher aliases for selecting based on the rule_str.
1441  * There might be two types of entries in the rule_str: 1) names
1442  * of ciphers themselves 2) aliases for groups of ciphers.
1443  * For 1) we need the available ciphers and for 2) the cipher
1444  * groups of cipher_aliases added together in one list (otherwise
1445  * we would be happy with just the cipher_aliases table).
1446  */
1447  num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1448  num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1449  ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1450  if (ca_list == NULL)
1451  {
1452  OPENSSL_free(co_list);
1453  SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1454  return(NULL); /* Failure */
1455  }
1456  ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1457  disabled_mkey, disabled_auth, disabled_enc,
1458  disabled_mac, disabled_ssl, head);
1459 
1460  /*
1461  * If the rule_string begins with DEFAULT, apply the default rule
1462  * before using the (possibly available) additional rules.
1463  */
1464  ok = 1;
1465  rule_p = rule_str;
1466  if (strncmp(rule_str,"DEFAULT",7) == 0)
1467  {
1468  ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1469  &head, &tail, ca_list);
1470  rule_p += 7;
1471  if (*rule_p == ':')
1472  rule_p++;
1473  }
1474 
1475  if (ok && (strlen(rule_p) > 0))
1476  ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1477 
1478  OPENSSL_free((void *)ca_list); /* Not needed anymore */
1479 
1480  if (!ok)
1481  { /* Rule processing failure */
1482  OPENSSL_free(co_list);
1483  return(NULL);
1484  }
1485 
1486  /*
1487  * Allocate new "cipherstack" for the result, return with error
1488  * if we cannot get one.
1489  */
1490  if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1491  {
1492  OPENSSL_free(co_list);
1493  return(NULL);
1494  }
1495 
1496  /*
1497  * The cipher selection for the list is done. The ciphers are added
1498  * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1499  */
1500  for (curr = head; curr != NULL; curr = curr->next)
1501  {
1502 #ifdef OPENSSL_FIPS
1503  if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1504 #else
1505  if (curr->active)
1506 #endif
1507  {
1508  sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1509 #ifdef CIPHER_DEBUG
1510  printf("<%s>\n",curr->cipher->name);
1511 #endif
1512  }
1513  }
1514  OPENSSL_free(co_list); /* Not needed any longer */
1515 
1516  tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1517  if (tmp_cipher_list == NULL)
1518  {
1519  sk_SSL_CIPHER_free(cipherstack);
1520  return NULL;
1521  }
1522  if (*cipher_list != NULL)
1523  sk_SSL_CIPHER_free(*cipher_list);
1524  *cipher_list = cipherstack;
1525  if (*cipher_list_by_id != NULL)
1526  sk_SSL_CIPHER_free(*cipher_list_by_id);
1527  *cipher_list_by_id = tmp_cipher_list;
1528  (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1529 
1530  sk_SSL_CIPHER_sort(*cipher_list_by_id);
1531  return(cipherstack);
1532  }
1533 
1534 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1535  {
1536  int is_export,pkl,kl;
1537  const char *ver,*exp_str;
1538  const char *kx,*au,*enc,*mac;
1539  unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1540 #ifdef KSSL_DEBUG
1541  static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1542 #else
1543  static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1544 #endif /* KSSL_DEBUG */
1545 
1546  alg_mkey = cipher->algorithm_mkey;
1547  alg_auth = cipher->algorithm_auth;
1548  alg_enc = cipher->algorithm_enc;
1549  alg_mac = cipher->algorithm_mac;
1550  alg_ssl = cipher->algorithm_ssl;
1551 
1552  alg2=cipher->algorithm2;
1553 
1554  is_export=SSL_C_IS_EXPORT(cipher);
1555  pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1556  kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1557  exp_str=is_export?" export":"";
1558 
1559  if (alg_ssl & SSL_SSLV2)
1560  ver="SSLv2";
1561  else if (alg_ssl & SSL_SSLV3)
1562  ver="SSLv3";
1563  else if (alg_ssl & SSL_TLSV1_2)
1564  ver="TLSv1.2";
1565  else
1566  ver="unknown";
1567 
1568  switch (alg_mkey)
1569  {
1570  case SSL_kRSA:
1571  kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1572  break;
1573  case SSL_kDHr:
1574  kx="DH/RSA";
1575  break;
1576  case SSL_kDHd:
1577  kx="DH/DSS";
1578  break;
1579  case SSL_kKRB5:
1580  kx="KRB5";
1581  break;
1582  case SSL_kEDH:
1583  kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1584  break;
1585  case SSL_kECDHr:
1586  kx="ECDH/RSA";
1587  break;
1588  case SSL_kECDHe:
1589  kx="ECDH/ECDSA";
1590  break;
1591  case SSL_kEECDH:
1592  kx="ECDH";
1593  break;
1594  case SSL_kPSK:
1595  kx="PSK";
1596  break;
1597  case SSL_kSRP:
1598  kx="SRP";
1599  break;
1600  default:
1601  kx="unknown";
1602  }
1603 
1604  switch (alg_auth)
1605  {
1606  case SSL_aRSA:
1607  au="RSA";
1608  break;
1609  case SSL_aDSS:
1610  au="DSS";
1611  break;
1612  case SSL_aDH:
1613  au="DH";
1614  break;
1615  case SSL_aKRB5:
1616  au="KRB5";
1617  break;
1618  case SSL_aECDH:
1619  au="ECDH";
1620  break;
1621  case SSL_aNULL:
1622  au="None";
1623  break;
1624  case SSL_aECDSA:
1625  au="ECDSA";
1626  break;
1627  case SSL_aPSK:
1628  au="PSK";
1629  break;
1630  default:
1631  au="unknown";
1632  break;
1633  }
1634 
1635  switch (alg_enc)
1636  {
1637  case SSL_DES:
1638  enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1639  break;
1640  case SSL_3DES:
1641  enc="3DES(168)";
1642  break;
1643  case SSL_RC4:
1644  enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1645  :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1646  break;
1647  case SSL_RC2:
1648  enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1649  break;
1650  case SSL_IDEA:
1651  enc="IDEA(128)";
1652  break;
1653  case SSL_eNULL:
1654  enc="None";
1655  break;
1656  case SSL_AES128:
1657  enc="AES(128)";
1658  break;
1659  case SSL_AES256:
1660  enc="AES(256)";
1661  break;
1662  case SSL_AES128GCM:
1663  enc="AESGCM(128)";
1664  break;
1665  case SSL_AES256GCM:
1666  enc="AESGCM(256)";
1667  break;
1668  case SSL_CAMELLIA128:
1669  enc="Camellia(128)";
1670  break;
1671  case SSL_CAMELLIA256:
1672  enc="Camellia(256)";
1673  break;
1674  case SSL_SEED:
1675  enc="SEED(128)";
1676  break;
1677  default:
1678  enc="unknown";
1679  break;
1680  }
1681 
1682  switch (alg_mac)
1683  {
1684  case SSL_MD5:
1685  mac="MD5";
1686  break;
1687  case SSL_SHA1:
1688  mac="SHA1";
1689  break;
1690  case SSL_SHA256:
1691  mac="SHA256";
1692  break;
1693  case SSL_SHA384:
1694  mac="SHA384";
1695  break;
1696  case SSL_AEAD:
1697  mac="AEAD";
1698  break;
1699  default:
1700  mac="unknown";
1701  break;
1702  }
1703 
1704  if (buf == NULL)
1705  {
1706  len=128;
1707  buf=OPENSSL_malloc(len);
1708  if (buf == NULL) return("OPENSSL_malloc Error");
1709  }
1710  else if (len < 128)
1711  return("Buffer too small");
1712 
1713 #ifdef KSSL_DEBUG
1714  BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1715 #else
1716  BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1717 #endif /* KSSL_DEBUG */
1718  return(buf);
1719  }
1720 
1721 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1722  {
1723  int i;
1724 
1725  if (c == NULL) return("(NONE)");
1726  i=(int)(c->id>>24L);
1727  if (i == 3)
1728  return("TLSv1/SSLv3");
1729  else if (i == 2)
1730  return("SSLv2");
1731  else
1732  return("unknown");
1733  }
1734 
1735 /* return the actual cipher being used */
1736 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1737  {
1738  if (c != NULL)
1739  return(c->name);
1740  return("(NONE)");
1741  }
1742 
1743 /* number of bits for symmetric cipher */
1744 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1745  {
1746  int ret=0;
1747 
1748  if (c != NULL)
1749  {
1750  if (alg_bits != NULL) *alg_bits = c->alg_bits;
1751  ret = c->strength_bits;
1752  }
1753  return(ret);
1754  }
1755 
1756 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1757  {
1758  return c->id;
1759  }
1760 
1761 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1762  {
1763  SSL_COMP *ctmp;
1764  int i,nn;
1765 
1766  if ((n == 0) || (sk == NULL)) return(NULL);
1767  nn=sk_SSL_COMP_num(sk);
1768  for (i=0; i<nn; i++)
1769  {
1770  ctmp=sk_SSL_COMP_value(sk,i);
1771  if (ctmp->id == n)
1772  return(ctmp);
1773  }
1774  return(NULL);
1775  }
1776 
1777 #ifdef OPENSSL_NO_COMP
1778 void *SSL_COMP_get_compression_methods(void)
1779  {
1780  return NULL;
1781  }
1782 int SSL_COMP_add_compression_method(int id, void *cm)
1783  {
1784  return 1;
1785  }
1786 
1787 const char *SSL_COMP_get_name(const void *comp)
1788  {
1789  return NULL;
1790  }
1791 #else
1792 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1793  {
1794  load_builtin_compressions();
1795  return(ssl_comp_methods);
1796  }
1797 
1798 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1799  {
1800  SSL_COMP *comp;
1801 
1802  if (cm == NULL || cm->type == NID_undef)
1803  return 1;
1804 
1805  /* According to draft-ietf-tls-compression-04.txt, the
1806  compression number ranges should be the following:
1807 
1808  0 to 63: methods defined by the IETF
1809  64 to 192: external party methods assigned by IANA
1810  193 to 255: reserved for private use */
1811  if (id < 193 || id > 255)
1812  {
1813  SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1814  return 0;
1815  }
1816 
1817  MemCheck_off();
1818  comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1819  comp->id=id;
1820  comp->method=cm;
1821  load_builtin_compressions();
1822  if (ssl_comp_methods
1823  && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1824  {
1825  OPENSSL_free(comp);
1826  MemCheck_on();
1827  SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1828  return(1);
1829  }
1830  else if ((ssl_comp_methods == NULL)
1831  || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1832  {
1833  OPENSSL_free(comp);
1834  MemCheck_on();
1835  SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1836  return(1);
1837  }
1838  else
1839  {
1840  MemCheck_on();
1841  return(0);
1842  }
1843  }
1844 
1845 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1846  {
1847  if (comp)
1848  return comp->name;
1849  return NULL;
1850  }
1851 
1852 #endif
Generated on Thu Jan 10 2013 09:53:44 for OpenSSL by   doxygen 1.8.2