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1 | /* ssl/ssl_ciph.c */ |
2 | /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
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 (tjh@cryptsoft.com). | |
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 (eay@cryptsoft.com)" | |
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 (tjh@cryptsoft.com)" | |
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 | #include <stdio.h> | |
60 | #include "objects.h" | |
61 | #include "ssl_locl.h" | |
62 | ||
63 | #define SSL_ENC_DES_IDX 0 | |
64 | #define SSL_ENC_3DES_IDX 1 | |
65 | #define SSL_ENC_RC4_IDX 2 | |
66 | #define SSL_ENC_RC2_IDX 3 | |
67 | #define SSL_ENC_IDEA_IDX 4 | |
68 | #define SSL_ENC_eFZA_IDX 5 | |
69 | #define SSL_ENC_NULL_IDX 6 | |
70 | #define SSL_ENC_NUM_IDX 7 | |
71 | ||
72 | static EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ | |
73 | NULL,NULL,NULL,NULL,NULL,NULL, | |
74 | }; | |
75 | ||
76 | #define SSL_MD_MD5_IDX 0 | |
77 | #define SSL_MD_SHA0_IDX 1 | |
78 | #define SSL_MD_SHA1_IDX 2 | |
79 | #define SSL_MD_NUM_IDX 3 | |
80 | static EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ | |
81 | NULL,NULL,NULL, | |
82 | }; | |
83 | ||
84 | typedef struct cipher_sort_st | |
85 | { | |
86 | SSL_CIPHER *cipher; | |
87 | int pref; | |
88 | } CIPHER_SORT; | |
89 | ||
90 | #define CIPHER_ADD 1 | |
91 | #define CIPHER_KILL 2 | |
92 | #define CIPHER_DEL 3 | |
93 | #define CIPHER_ORDER 4 | |
94 | ||
95 | typedef struct cipher_choice_st | |
96 | { | |
97 | int type; | |
98 | unsigned long algorithms; | |
99 | unsigned long mask; | |
100 | STACK *order; | |
101 | } CIPHER_CHOICE; | |
102 | ||
103 | static SSL_CIPHER cipher_aliases[]={ | |
104 | {0,SSL_TXT_ALL, 0,SSL_ALL, 0,SSL_ALL}, /* must be first */ | |
105 | {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,SSL_MKEY_MASK}, | |
106 | {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,SSL_MKEY_MASK}, | |
107 | {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,SSL_MKEY_MASK}, | |
108 | {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,SSL_MKEY_MASK}, | |
109 | {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,SSL_MKEY_MASK}, | |
110 | {0,SSL_TXT_DH, 0,SSL_DH, 0,SSL_MKEY_MASK}, | |
111 | {0,SSL_TXT_EDH, 0,SSL_EDH, 0,SSL_MKEY_MASK|SSL_AUTH_MASK}, | |
112 | ||
113 | {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,SSL_AUTH_MASK}, | |
114 | {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,SSL_AUTH_MASK}, | |
115 | {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,SSL_AUTH_MASK}, | |
116 | {0,SSL_TXT_aNULL,0,SSL_aNULL,0,SSL_AUTH_MASK}, | |
117 | {0,SSL_TXT_aDH, 0,SSL_aDH, 0,SSL_AUTH_MASK}, | |
118 | {0,SSL_TXT_DSS, 0,SSL_DSS, 0,SSL_AUTH_MASK}, | |
119 | ||
120 | {0,SSL_TXT_DES, 0,SSL_DES, 0,SSL_ENC_MASK}, | |
121 | {0,SSL_TXT_3DES,0,SSL_3DES, 0,SSL_ENC_MASK}, | |
122 | {0,SSL_TXT_RC4, 0,SSL_RC4, 0,SSL_ENC_MASK}, | |
123 | {0,SSL_TXT_RC2, 0,SSL_RC2, 0,SSL_ENC_MASK}, | |
124 | {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,SSL_ENC_MASK}, | |
125 | {0,SSL_TXT_eNULL,0,SSL_eNULL,0,SSL_ENC_MASK}, | |
126 | {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,SSL_ENC_MASK}, | |
127 | ||
128 | {0,SSL_TXT_MD5, 0,SSL_MD5, 0,SSL_MAC_MASK}, | |
129 | {0,SSL_TXT_SHA0,0,SSL_SHA0, 0,SSL_MAC_MASK}, | |
130 | {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,SSL_MAC_MASK}, | |
131 | {0,SSL_TXT_SHA, 0,SSL_SHA, 0,SSL_MAC_MASK}, | |
132 | ||
133 | {0,SSL_TXT_NULL,0,SSL_NULL, 0,SSL_ENC_MASK}, | |
134 | {0,SSL_TXT_RSA, 0,SSL_RSA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK}, | |
135 | {0,SSL_TXT_ADH, 0,SSL_ADH, 0,SSL_AUTH_MASK|SSL_MKEY_MASK}, | |
136 | {0,SSL_TXT_FZA, 0,SSL_FZA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK}, | |
137 | ||
138 | {0,SSL_TXT_EXP, 0,SSL_EXP, 0,SSL_EXP_MASK}, | |
139 | {0,SSL_TXT_EXPORT,0,SSL_EXPORT,0,SSL_EXP_MASK}, | |
140 | {0,SSL_TXT_SSLV2,0,SSL_SSLV2,0,SSL_SSL_MASK}, | |
141 | {0,SSL_TXT_SSLV3,0,SSL_SSLV3,0,SSL_SSL_MASK}, | |
142 | {0,SSL_TXT_LOW, 0,SSL_LOW,0,SSL_STRONG_MASK}, | |
143 | {0,SSL_TXT_MEDIUM,0,SSL_MEDIUM,0,SSL_STRONG_MASK}, | |
144 | {0,SSL_TXT_HIGH, 0,SSL_HIGH,0,SSL_STRONG_MASK}, | |
145 | }; | |
146 | ||
147 | static int init_ciphers=1; | |
148 | static void load_ciphers(); | |
149 | ||
150 | static int cmp_by_name(a,b) | |
151 | SSL_CIPHER **a,**b; | |
152 | { | |
153 | return(strcmp((*a)->name,(*b)->name)); | |
154 | } | |
155 | ||
156 | static void load_ciphers() | |
157 | { | |
158 | init_ciphers=0; | |
159 | ssl_cipher_methods[SSL_ENC_DES_IDX]= | |
160 | EVP_get_cipherbyname(SN_des_cbc); | |
161 | ssl_cipher_methods[SSL_ENC_3DES_IDX]= | |
162 | EVP_get_cipherbyname(SN_des_ede3_cbc); | |
163 | ssl_cipher_methods[SSL_ENC_RC4_IDX]= | |
164 | EVP_get_cipherbyname(SN_rc4); | |
165 | ssl_cipher_methods[SSL_ENC_RC2_IDX]= | |
166 | EVP_get_cipherbyname(SN_rc2_cbc); | |
167 | ssl_cipher_methods[SSL_ENC_IDEA_IDX]= | |
168 | EVP_get_cipherbyname(SN_idea_cbc); | |
169 | ||
170 | ssl_digest_methods[SSL_MD_MD5_IDX]= | |
171 | EVP_get_digestbyname(SN_md5); | |
172 | ssl_digest_methods[SSL_MD_SHA0_IDX]= | |
173 | EVP_get_digestbyname(SN_sha); | |
174 | ssl_digest_methods[SSL_MD_SHA1_IDX]= | |
175 | EVP_get_digestbyname(SN_sha1); | |
176 | } | |
177 | ||
178 | int ssl_cipher_get_evp(c,enc,md) | |
179 | SSL_CIPHER *c; | |
180 | EVP_CIPHER **enc; | |
181 | EVP_MD **md; | |
182 | { | |
183 | int i; | |
184 | ||
185 | if (c == NULL) return(0); | |
186 | ||
187 | switch (c->algorithms & SSL_ENC_MASK) | |
188 | { | |
189 | case SSL_DES: | |
190 | i=SSL_ENC_DES_IDX; | |
191 | break; | |
192 | case SSL_3DES: | |
193 | i=SSL_ENC_3DES_IDX; | |
194 | break; | |
195 | case SSL_RC4: | |
196 | i=SSL_ENC_RC4_IDX; | |
197 | break; | |
198 | case SSL_RC2: | |
199 | i=SSL_ENC_RC2_IDX; | |
200 | break; | |
201 | case SSL_IDEA: | |
202 | i=SSL_ENC_IDEA_IDX; | |
203 | break; | |
204 | case SSL_eNULL: | |
205 | i=SSL_ENC_NULL_IDX; | |
206 | break; | |
207 | break; | |
208 | default: | |
209 | i= -1; | |
210 | break; | |
211 | } | |
212 | ||
213 | if ((i < 0) || (i > SSL_ENC_NUM_IDX)) | |
214 | *enc=NULL; | |
215 | else | |
216 | { | |
217 | if (i == SSL_ENC_NULL_IDX) | |
218 | *enc=EVP_enc_null(); | |
219 | else | |
220 | *enc=ssl_cipher_methods[i]; | |
221 | } | |
222 | ||
223 | switch (c->algorithms & SSL_MAC_MASK) | |
224 | { | |
225 | case SSL_MD5: | |
226 | i=SSL_MD_MD5_IDX; | |
227 | break; | |
228 | case SSL_SHA0: | |
229 | i=SSL_MD_SHA0_IDX; | |
230 | break; | |
231 | case SSL_SHA1: | |
232 | i=SSL_MD_SHA1_IDX; | |
233 | break; | |
234 | default: | |
235 | i= -1; | |
236 | break; | |
237 | } | |
238 | if ((i < 0) || (i > SSL_MD_NUM_IDX)) | |
239 | *md=NULL; | |
240 | else | |
241 | *md=ssl_digest_methods[i]; | |
242 | ||
243 | if ((*enc != NULL) && (*md != NULL)) | |
244 | return(1); | |
245 | else | |
246 | return(0); | |
247 | } | |
248 | ||
249 | STACK *ssl_create_cipher_list(ssl_method,cipher_list,cipher_list_by_id,str) | |
250 | SSL_METHOD *ssl_method; | |
251 | STACK **cipher_list,**cipher_list_by_id; | |
252 | char *str; | |
253 | { | |
254 | SSL_CIPHER *c; | |
255 | char *l; | |
256 | STACK *ret=NULL,*ok=NULL; | |
257 | #define CL_BUF 40 | |
258 | char buf[CL_BUF]; | |
259 | char *tmp_str=NULL; | |
260 | unsigned long mask,algorithms,ma; | |
261 | char *start; | |
262 | int i,j,k,num=0,ch,multi; | |
263 | unsigned long al; | |
264 | STACK *ca_list=NULL; | |
265 | STACK *c_list=NULL; | |
266 | int old_x,old_y,current_x,num_x; | |
267 | CIPHER_CHOICE *ops=NULL; | |
268 | SSL_CIPHER c_tmp,*cp; | |
269 | ||
270 | if (str == NULL) return(NULL); | |
271 | ||
272 | if (strncmp(str,"DEFAULT",7) == 0) | |
273 | { | |
274 | i=strlen(str)+2+strlen(SSL_DEFAULT_CIPHER_LIST); | |
275 | if ((tmp_str=Malloc(i)) == NULL) | |
276 | { | |
277 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); | |
278 | goto err; | |
279 | } | |
280 | strcpy(tmp_str,SSL_DEFAULT_CIPHER_LIST); | |
281 | strcat(tmp_str,&(str[7])); | |
282 | str=tmp_str; | |
283 | } | |
284 | if (init_ciphers) load_ciphers(); | |
285 | ||
286 | num=ssl_method->num_ciphers(); | |
287 | ||
288 | if ((ret=(STACK *)sk_new(NULL)) == NULL) goto err; | |
289 | if ((c_list=(STACK *)sk_new(NULL)) == NULL) goto err; | |
290 | if ((ca_list=(STACK *)sk_new(cmp_by_name)) == NULL) goto err; | |
291 | ||
292 | mask =SSL_kFZA; | |
293 | #ifdef NO_RSA | |
294 | mask|=SSL_aRSA|SSL_kRSA; | |
295 | #endif | |
296 | #ifdef NO_DSA | |
297 | mask|=SSL_aDSS; | |
298 | #endif | |
299 | #ifdef NO_DH | |
300 | mask|=SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH; | |
301 | #endif | |
302 | ||
303 | #ifndef SSL_ALLOW_ENULL | |
304 | mask|=SSL_eNULL; | |
305 | #endif | |
306 | ||
307 | mask|=(ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL)?SSL_DES :0; | |
308 | mask|=(ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL)?SSL_3DES:0; | |
309 | mask|=(ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL)?SSL_RC4 :0; | |
310 | mask|=(ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL)?SSL_RC2 :0; | |
311 | mask|=(ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL)?SSL_IDEA:0; | |
312 | mask|=(ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL)?SSL_eFZA:0; | |
313 | ||
314 | mask|=(ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL)?SSL_MD5 :0; | |
315 | mask|=(ssl_digest_methods[SSL_MD_SHA0_IDX] == NULL)?SSL_SHA0:0; | |
316 | mask|=(ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL)?SSL_SHA1:0; | |
317 | ||
318 | /* Get the initial list of ciphers */ | |
319 | for (i=0; i<num; i++) | |
320 | { | |
321 | c=ssl_method->get_cipher((unsigned int)i); | |
322 | /* drop those that use any of that is not available */ | |
323 | if ((c != NULL) && c->valid && !(c->algorithms & mask)) | |
324 | { | |
325 | if (!sk_push(c_list,(char *)c)) goto err; | |
326 | if (!sk_push(ca_list,(char *)c)) goto err; | |
327 | } | |
328 | } | |
329 | ||
330 | /* special case */ | |
331 | cipher_aliases[0].algorithms= ~mask; | |
332 | ||
333 | /* get the aliases */ | |
334 | k=sizeof(cipher_aliases)/sizeof(SSL_CIPHER); | |
335 | for (j=0; j<k; j++) | |
336 | { | |
337 | al=cipher_aliases[j].algorithms; | |
338 | /* Drop those that are not relevent */ | |
339 | if ((al & mask) == al) continue; | |
340 | if (!sk_push(ca_list,(char *)&(cipher_aliases[j]))) goto err; | |
341 | } | |
342 | ||
343 | /* ca_list now holds a 'stack' of SSL_CIPHERS, some real, some | |
344 | * 'aliases' */ | |
345 | ||
346 | /* how many parameters are there? */ | |
347 | num=1; | |
348 | for (l=str; *l; l++) | |
349 | if (*l == ':') num++; | |
350 | ops=(CIPHER_CHOICE *)Malloc(sizeof(CIPHER_CHOICE)*num); | |
351 | if (ops == NULL) goto err; | |
352 | memset(ops,0,sizeof(CIPHER_CHOICE)*num); | |
353 | for (i=0; i<num; i++) | |
354 | if ((ops[i].order=sk_new_null()) == NULL) goto err; | |
355 | ||
356 | /* we now parse the input string and create our operations */ | |
357 | l=str; | |
358 | i=0; | |
359 | current_x=0; | |
360 | ||
361 | for (;;) | |
362 | { | |
363 | ch= *l; | |
364 | if (ch == '-') | |
365 | { j=CIPHER_DEL; l++; } | |
366 | else if (ch == '+') | |
367 | { j=CIPHER_ORDER; l++; } | |
368 | else if (ch == '!') | |
369 | { j=CIPHER_KILL; l++; } | |
370 | else | |
371 | { j=CIPHER_ADD; } | |
372 | ||
373 | if (*l == ':') | |
374 | { | |
375 | l++; | |
376 | continue; | |
377 | } | |
378 | ops[current_x].type=j; | |
379 | ops[current_x].algorithms=0; | |
380 | ops[current_x].mask=0; | |
381 | ||
382 | start=l; | |
383 | for (;;) | |
384 | { | |
385 | ch= *l; | |
386 | i=0; | |
387 | while ( ((ch >= 'A') && (ch <= 'Z')) || | |
388 | ((ch >= '0') && (ch <= '9')) || | |
389 | ((ch >= 'a') && (ch <= 'z')) || | |
390 | (ch == '-')) | |
391 | { | |
392 | buf[i]=ch; | |
393 | ch= *(++l); | |
394 | i++; | |
395 | if (i >= (CL_BUF-2)) break; | |
396 | } | |
397 | buf[i]='\0'; | |
398 | if (ch != '\0') l++; | |
399 | ||
400 | /* check for multi-part specification */ | |
401 | multi=(ch == '+')?1:0; | |
402 | ||
403 | c_tmp.name=buf; | |
404 | j=sk_find(ca_list,(char *)&c_tmp); | |
405 | if (j < 0) | |
406 | { | |
407 | if (ch == '\0') | |
408 | break; | |
409 | else | |
410 | continue; | |
411 | } | |
412 | ||
413 | cp=(SSL_CIPHER *)sk_value(ca_list,j); | |
414 | ops[current_x].algorithms|=cp->algorithms; | |
415 | /* We add the SSL_SSL_MASK so we can match the | |
416 | * SSLv2 and SSLv3 versions of RC4-MD5 */ | |
417 | ops[current_x].mask|=cp->mask; | |
418 | if (!multi) break; | |
419 | } | |
420 | current_x++; | |
421 | if (ch == '\0') break; | |
422 | } | |
423 | ||
424 | num_x=current_x; | |
425 | current_x=0; | |
426 | ||
427 | #ifdef CIPHER_DEBUG | |
428 | printf("<--->\n"); | |
429 | #endif | |
430 | ||
431 | for (i=0; i<sk_num(c_list); i++) | |
432 | { | |
433 | old_x= -1; | |
434 | old_y= -1; | |
435 | cp=(SSL_CIPHER *)sk_value(c_list,i); | |
436 | #ifdef CIPHER_DEBUG | |
437 | printf("[%s]\n",cp->name); | |
438 | #endif | |
439 | for (j=0; j<num_x; j++) | |
440 | { | |
441 | algorithms=ops[j].algorithms; | |
442 | ma=ops[j].mask & cp->algorithms; | |
443 | #ifdef CIPHER_DEBUG | |
444 | printf(" %s %08lX&%08lX==0 || %08lX != %08lX \n", | |
445 | cp->name,ops[j].mask,cp->algorithms,ma,algorithms); | |
446 | #endif | |
447 | if ((ma == 0) || ((ma & algorithms) != ma)) | |
448 | { | |
449 | continue; | |
450 | } | |
451 | k=ops[j].type; | |
452 | #ifdef CIPHER_DEBUG | |
453 | printf(">>%s\n",cp->name); | |
454 | #endif | |
455 | ||
456 | /* add the cipher if it has not been added yet. */ | |
457 | if (k == CIPHER_ADD) | |
458 | { | |
459 | if (old_x < 0) | |
460 | { | |
461 | old_x=j; | |
462 | old_y=sk_num(ops[j].order); | |
463 | sk_push(ops[j].order,(char *)cp); | |
464 | } | |
465 | } | |
466 | /* Move the added cipher to this location */ | |
467 | else if (k == CIPHER_ORDER) | |
468 | { | |
469 | if (old_x >= 0) | |
470 | { | |
471 | sk_value(ops[old_x].order,old_y)=NULL; | |
472 | old_y=sk_num(ops[j].order); | |
473 | sk_push(ops[j].order,(char *)cp); | |
474 | old_x=j; | |
475 | } | |
476 | } | |
477 | /* Remove added cipher */ | |
478 | else if ((k == CIPHER_DEL) || (k == CIPHER_KILL)) | |
479 | { | |
480 | if (old_x >= 0) | |
481 | { | |
482 | sk_value(ops[old_x].order,old_y)=NULL; | |
483 | old_x= -1; | |
484 | } | |
485 | if (k == CIPHER_KILL) | |
486 | break; | |
487 | } | |
488 | } | |
489 | } | |
490 | ||
491 | for (i=0; i<num_x; i++) | |
492 | { | |
493 | for (j=0; j<sk_num(ops[i].order); j++) | |
494 | { | |
495 | cp=(SSL_CIPHER *)sk_value(ops[i].order,j); | |
496 | if (cp != NULL) | |
497 | { | |
498 | sk_push(ret,(char *)cp); | |
499 | #ifdef CIPHER_DEBUG | |
500 | printf("<%s>\n",cp->name); | |
501 | #endif | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | if (cipher_list != NULL) | |
507 | { | |
508 | if (*cipher_list != NULL) | |
509 | sk_free(*cipher_list); | |
510 | *cipher_list=ret; | |
511 | } | |
512 | ||
513 | if (cipher_list_by_id != NULL) | |
514 | { | |
515 | if (*cipher_list_by_id != NULL) | |
516 | sk_free(*cipher_list_by_id); | |
517 | *cipher_list_by_id=sk_dup(ret); | |
518 | } | |
519 | ||
520 | if ( (cipher_list_by_id == NULL) || | |
521 | (*cipher_list_by_id == NULL) || | |
522 | (cipher_list == NULL) || | |
523 | (*cipher_list == NULL)) | |
524 | goto err; | |
525 | sk_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); | |
526 | ||
527 | ok=ret; | |
528 | ret=NULL; | |
529 | err: | |
530 | if (tmp_str) Free(tmp_str); | |
531 | if (ops != NULL) | |
532 | { | |
533 | for (i=0; i<num; i++) | |
534 | if (ops[i].order != NULL) | |
535 | sk_free(ops[i].order); | |
536 | Free(ops); | |
537 | } | |
538 | if (ret != NULL) sk_free(ret); | |
539 | if (c_list != NULL) sk_free(c_list); | |
540 | if (ca_list != NULL) sk_free(ca_list); | |
541 | return(ok); | |
542 | } | |
543 | ||
544 | char *SSL_CIPHER_description(cipher,buf,len) | |
545 | SSL_CIPHER *cipher; | |
546 | char *buf; | |
547 | int len; | |
548 | { | |
549 | int export; | |
550 | char *ver,*exp; | |
551 | char *kx,*au,*enc,*mac; | |
552 | unsigned long alg,alg2; | |
553 | static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; | |
554 | ||
555 | alg=cipher->algorithms; | |
556 | alg2=cipher->algorithm2; | |
557 | ||
558 | export=(alg&SSL_EXP)?1:0; | |
559 | exp=(export)?" export":""; | |
560 | ||
561 | if (alg & SSL_SSLV2) | |
562 | ver="SSLv2"; | |
563 | else if (alg & SSL_SSLV3) | |
564 | ver="SSLv3"; | |
565 | else | |
566 | ver="unknown"; | |
567 | ||
568 | switch (alg&SSL_MKEY_MASK) | |
569 | { | |
570 | case SSL_kRSA: | |
571 | kx=(export)?"RSA(512)":"RSA"; | |
572 | break; | |
573 | case SSL_kDHr: | |
574 | kx="DH/RSA"; | |
575 | break; | |
576 | case SSL_kDHd: | |
577 | kx="DH/DSS"; | |
578 | break; | |
579 | case SSL_kFZA: | |
580 | kx="Fortezza"; | |
581 | break; | |
582 | case SSL_kEDH: | |
583 | kx=(export)?"DH(512)":"DH"; | |
584 | break; | |
585 | default: | |
586 | kx="unknown"; | |
587 | } | |
588 | ||
589 | switch (alg&SSL_AUTH_MASK) | |
590 | { | |
591 | case SSL_aRSA: | |
592 | au="RSA"; | |
593 | break; | |
594 | case SSL_aDSS: | |
595 | au="DSS"; | |
596 | break; | |
597 | case SSL_aDH: | |
598 | au="DH"; | |
599 | break; | |
600 | case SSL_aFZA: | |
601 | case SSL_aNULL: | |
602 | au="None"; | |
603 | break; | |
604 | default: | |
605 | au="unknown"; | |
606 | break; | |
607 | } | |
608 | ||
609 | switch (alg&SSL_ENC_MASK) | |
610 | { | |
611 | case SSL_DES: | |
612 | enc=export?"DES(40)":"DES(56)"; | |
613 | break; | |
614 | case SSL_3DES: | |
615 | enc="3DES(168)"; | |
616 | break; | |
617 | case SSL_RC4: | |
618 | enc=export?"RC4(40)":((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); | |
619 | break; | |
620 | case SSL_RC2: | |
621 | enc=export?"RC2(40)":"RC2(128)"; | |
622 | break; | |
623 | case SSL_IDEA: | |
624 | enc="IDEA(128)"; | |
625 | break; | |
626 | case SSL_eFZA: | |
627 | enc="Fortezza"; | |
628 | break; | |
629 | case SSL_eNULL: | |
630 | enc="None"; | |
631 | break; | |
632 | default: | |
633 | enc="unknown"; | |
634 | break; | |
635 | } | |
636 | ||
637 | switch (alg&SSL_MAC_MASK) | |
638 | { | |
639 | case SSL_MD5: | |
640 | mac="MD5"; | |
641 | break; | |
642 | case SSL_SHA0: | |
643 | mac="SHA0"; | |
644 | break; | |
645 | case SSL_SHA1: | |
646 | mac="SHA1"; | |
647 | break; | |
648 | default: | |
649 | mac="unknown"; | |
650 | break; | |
651 | } | |
652 | ||
653 | if (buf == NULL) | |
654 | { | |
655 | buf=Malloc(128); | |
656 | if (buf == NULL) return("Malloc Error"); | |
657 | } | |
658 | else if (len < 128) | |
659 | return("Buffer too small"); | |
660 | ||
661 | sprintf(buf,format,cipher->name,ver,kx,au,enc,mac,exp); | |
662 | return(buf); | |
663 | } | |
664 | ||
665 | char *SSL_CIPHER_get_version(c) | |
666 | SSL_CIPHER *c; | |
667 | { | |
668 | int i; | |
669 | ||
670 | i=(int)(c->id>>24L); | |
671 | if (i == 3) | |
672 | return("SSLv3"); | |
673 | else if (i == 2) | |
674 | return("SSLv2"); | |
675 | else | |
676 | return("unknown"); | |
677 | } | |
678 | ||
679 | /* return the actual cipher being used */ | |
680 | char *SSL_CIPHER_get_name(c) | |
681 | SSL_CIPHER *c; | |
682 | { | |
683 | if (c != NULL) | |
684 | return(c->name); | |
685 | return("(NONE)"); | |
686 | } | |
687 | ||
688 | /* number of bits for symetric cipher */ | |
689 | int SSL_CIPHER_get_bits(c,alg_bits) | |
690 | SSL_CIPHER *c; | |
691 | int *alg_bits; | |
692 | { | |
693 | int ret=0,a=0; | |
694 | EVP_CIPHER *enc; | |
695 | EVP_MD *md; | |
696 | ||
697 | if (c != NULL) | |
698 | { | |
699 | if (!ssl_cipher_get_evp(c,&enc,&md)) | |
700 | return(0); | |
701 | ||
702 | a=EVP_CIPHER_key_length(enc)*8; | |
703 | ||
704 | if (c->algorithms & SSL_EXP) | |
705 | { | |
706 | ret=40; | |
707 | } | |
708 | else | |
709 | { | |
710 | if (c->algorithm2 & SSL2_CF_8_BYTE_ENC) | |
711 | ret=64; | |
712 | else | |
713 | ret=a; | |
714 | } | |
715 | } | |
716 | ||
717 | if (alg_bits != NULL) *alg_bits=a; | |
718 | ||
719 | return(ret); | |
720 | } | |
721 |