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d02b48c6 | 1 | /* ssl/ssl_ciph.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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" | |
413c4f45 | 61 | #include "comp.h" |
d02b48c6 RE |
62 | #include "ssl_locl.h" |
63 | ||
64 | #define SSL_ENC_DES_IDX 0 | |
65 | #define SSL_ENC_3DES_IDX 1 | |
66 | #define SSL_ENC_RC4_IDX 2 | |
67 | #define SSL_ENC_RC2_IDX 3 | |
68 | #define SSL_ENC_IDEA_IDX 4 | |
69 | #define SSL_ENC_eFZA_IDX 5 | |
70 | #define SSL_ENC_NULL_IDX 6 | |
71 | #define SSL_ENC_NUM_IDX 7 | |
72 | ||
73 | static EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ | |
74 | NULL,NULL,NULL,NULL,NULL,NULL, | |
75 | }; | |
76 | ||
413c4f45 MC |
77 | static STACK /* SSL_COMP */ *ssl_comp_methods=NULL; |
78 | ||
d02b48c6 | 79 | #define SSL_MD_MD5_IDX 0 |
58964a49 RE |
80 | #define SSL_MD_SHA1_IDX 1 |
81 | #define SSL_MD_NUM_IDX 2 | |
d02b48c6 | 82 | static EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ |
58964a49 | 83 | NULL,NULL, |
d02b48c6 RE |
84 | }; |
85 | ||
86 | typedef struct cipher_sort_st | |
87 | { | |
88 | SSL_CIPHER *cipher; | |
89 | int pref; | |
90 | } CIPHER_SORT; | |
91 | ||
92 | #define CIPHER_ADD 1 | |
93 | #define CIPHER_KILL 2 | |
94 | #define CIPHER_DEL 3 | |
58964a49 | 95 | #define CIPHER_ORD 4 |
d02b48c6 RE |
96 | |
97 | typedef struct cipher_choice_st | |
98 | { | |
99 | int type; | |
100 | unsigned long algorithms; | |
101 | unsigned long mask; | |
58964a49 | 102 | long top; |
d02b48c6 RE |
103 | } CIPHER_CHOICE; |
104 | ||
58964a49 RE |
105 | typedef struct cipher_order_st |
106 | { | |
107 | SSL_CIPHER *cipher; | |
108 | int active; | |
109 | int dead; | |
110 | struct cipher_order_st *next,*prev; | |
111 | } CIPHER_ORDER; | |
112 | ||
d02b48c6 RE |
113 | static SSL_CIPHER cipher_aliases[]={ |
114 | {0,SSL_TXT_ALL, 0,SSL_ALL, 0,SSL_ALL}, /* must be first */ | |
115 | {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,SSL_MKEY_MASK}, | |
116 | {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,SSL_MKEY_MASK}, | |
117 | {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,SSL_MKEY_MASK}, | |
118 | {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,SSL_MKEY_MASK}, | |
119 | {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,SSL_MKEY_MASK}, | |
120 | {0,SSL_TXT_DH, 0,SSL_DH, 0,SSL_MKEY_MASK}, | |
121 | {0,SSL_TXT_EDH, 0,SSL_EDH, 0,SSL_MKEY_MASK|SSL_AUTH_MASK}, | |
122 | ||
123 | {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,SSL_AUTH_MASK}, | |
124 | {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,SSL_AUTH_MASK}, | |
125 | {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,SSL_AUTH_MASK}, | |
126 | {0,SSL_TXT_aNULL,0,SSL_aNULL,0,SSL_AUTH_MASK}, | |
127 | {0,SSL_TXT_aDH, 0,SSL_aDH, 0,SSL_AUTH_MASK}, | |
128 | {0,SSL_TXT_DSS, 0,SSL_DSS, 0,SSL_AUTH_MASK}, | |
129 | ||
130 | {0,SSL_TXT_DES, 0,SSL_DES, 0,SSL_ENC_MASK}, | |
131 | {0,SSL_TXT_3DES,0,SSL_3DES, 0,SSL_ENC_MASK}, | |
132 | {0,SSL_TXT_RC4, 0,SSL_RC4, 0,SSL_ENC_MASK}, | |
133 | {0,SSL_TXT_RC2, 0,SSL_RC2, 0,SSL_ENC_MASK}, | |
134 | {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,SSL_ENC_MASK}, | |
135 | {0,SSL_TXT_eNULL,0,SSL_eNULL,0,SSL_ENC_MASK}, | |
136 | {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,SSL_ENC_MASK}, | |
137 | ||
138 | {0,SSL_TXT_MD5, 0,SSL_MD5, 0,SSL_MAC_MASK}, | |
d02b48c6 RE |
139 | {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,SSL_MAC_MASK}, |
140 | {0,SSL_TXT_SHA, 0,SSL_SHA, 0,SSL_MAC_MASK}, | |
141 | ||
142 | {0,SSL_TXT_NULL,0,SSL_NULL, 0,SSL_ENC_MASK}, | |
143 | {0,SSL_TXT_RSA, 0,SSL_RSA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK}, | |
144 | {0,SSL_TXT_ADH, 0,SSL_ADH, 0,SSL_AUTH_MASK|SSL_MKEY_MASK}, | |
145 | {0,SSL_TXT_FZA, 0,SSL_FZA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK}, | |
146 | ||
06ab81f9 BL |
147 | {0,SSL_TXT_EXP40, 0,SSL_EXP40, 0,_SSL_EXP_MASK}, |
148 | {0,SSL_TXT_EXPORT,0,SSL_EXP40, 0,_SSL_EXP_MASK}, | |
149 | {0,SSL_TXT_EXP56, 0,SSL_EXP56, 0,_SSL_EXP_MASK}, | |
150 | {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,SSL_SSL_MASK}, | |
151 | {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,SSL_SSL_MASK}, | |
152 | {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,SSL_SSL_MASK}, | |
153 | {0,SSL_TXT_LOW, 0,SSL_LOW, 0,SSL_STRONG_MASK}, | |
d02b48c6 | 154 | {0,SSL_TXT_MEDIUM,0,SSL_MEDIUM,0,SSL_STRONG_MASK}, |
06ab81f9 | 155 | {0,SSL_TXT_HIGH, 0,SSL_HIGH, 0,SSL_STRONG_MASK}, |
d02b48c6 RE |
156 | }; |
157 | ||
158 | static int init_ciphers=1; | |
159 | static void load_ciphers(); | |
160 | ||
161 | static int cmp_by_name(a,b) | |
162 | SSL_CIPHER **a,**b; | |
163 | { | |
164 | return(strcmp((*a)->name,(*b)->name)); | |
165 | } | |
166 | ||
167 | static void load_ciphers() | |
168 | { | |
169 | init_ciphers=0; | |
170 | ssl_cipher_methods[SSL_ENC_DES_IDX]= | |
171 | EVP_get_cipherbyname(SN_des_cbc); | |
172 | ssl_cipher_methods[SSL_ENC_3DES_IDX]= | |
173 | EVP_get_cipherbyname(SN_des_ede3_cbc); | |
174 | ssl_cipher_methods[SSL_ENC_RC4_IDX]= | |
175 | EVP_get_cipherbyname(SN_rc4); | |
176 | ssl_cipher_methods[SSL_ENC_RC2_IDX]= | |
177 | EVP_get_cipherbyname(SN_rc2_cbc); | |
178 | ssl_cipher_methods[SSL_ENC_IDEA_IDX]= | |
179 | EVP_get_cipherbyname(SN_idea_cbc); | |
180 | ||
181 | ssl_digest_methods[SSL_MD_MD5_IDX]= | |
182 | EVP_get_digestbyname(SN_md5); | |
d02b48c6 RE |
183 | ssl_digest_methods[SSL_MD_SHA1_IDX]= |
184 | EVP_get_digestbyname(SN_sha1); | |
185 | } | |
186 | ||
413c4f45 MC |
187 | int ssl_cipher_get_evp(s,enc,md,comp) |
188 | SSL_SESSION *s; | |
d02b48c6 RE |
189 | EVP_CIPHER **enc; |
190 | EVP_MD **md; | |
413c4f45 | 191 | SSL_COMP **comp; |
d02b48c6 RE |
192 | { |
193 | int i; | |
413c4f45 | 194 | SSL_CIPHER *c; |
d02b48c6 | 195 | |
413c4f45 | 196 | c=s->cipher; |
d02b48c6 | 197 | if (c == NULL) return(0); |
413c4f45 MC |
198 | if (comp != NULL) |
199 | { | |
200 | SSL_COMP ctmp; | |
201 | ||
202 | if (s->compress_meth == 0) | |
203 | *comp=NULL; | |
204 | else if (ssl_comp_methods == NULL) | |
205 | { | |
206 | /* bad */ | |
207 | *comp=NULL; | |
208 | } | |
209 | else | |
210 | { | |
211 | ||
212 | ctmp.id=s->compress_meth; | |
213 | i=sk_find(ssl_comp_methods,(char *)&ctmp); | |
214 | if (i >= 0) | |
215 | *comp=(SSL_COMP *)sk_value(ssl_comp_methods,i); | |
216 | else | |
217 | *comp=NULL; | |
218 | } | |
219 | } | |
220 | ||
221 | if ((enc == NULL) || (md == NULL)) return(0); | |
d02b48c6 RE |
222 | |
223 | switch (c->algorithms & SSL_ENC_MASK) | |
224 | { | |
225 | case SSL_DES: | |
226 | i=SSL_ENC_DES_IDX; | |
227 | break; | |
228 | case SSL_3DES: | |
229 | i=SSL_ENC_3DES_IDX; | |
230 | break; | |
231 | case SSL_RC4: | |
232 | i=SSL_ENC_RC4_IDX; | |
233 | break; | |
234 | case SSL_RC2: | |
235 | i=SSL_ENC_RC2_IDX; | |
236 | break; | |
237 | case SSL_IDEA: | |
238 | i=SSL_ENC_IDEA_IDX; | |
239 | break; | |
240 | case SSL_eNULL: | |
241 | i=SSL_ENC_NULL_IDX; | |
242 | break; | |
d02b48c6 RE |
243 | default: |
244 | i= -1; | |
245 | break; | |
246 | } | |
247 | ||
248 | if ((i < 0) || (i > SSL_ENC_NUM_IDX)) | |
249 | *enc=NULL; | |
250 | else | |
251 | { | |
252 | if (i == SSL_ENC_NULL_IDX) | |
253 | *enc=EVP_enc_null(); | |
254 | else | |
255 | *enc=ssl_cipher_methods[i]; | |
256 | } | |
257 | ||
258 | switch (c->algorithms & SSL_MAC_MASK) | |
259 | { | |
260 | case SSL_MD5: | |
261 | i=SSL_MD_MD5_IDX; | |
262 | break; | |
d02b48c6 RE |
263 | case SSL_SHA1: |
264 | i=SSL_MD_SHA1_IDX; | |
265 | break; | |
266 | default: | |
267 | i= -1; | |
268 | break; | |
269 | } | |
270 | if ((i < 0) || (i > SSL_MD_NUM_IDX)) | |
271 | *md=NULL; | |
272 | else | |
273 | *md=ssl_digest_methods[i]; | |
274 | ||
275 | if ((*enc != NULL) && (*md != NULL)) | |
276 | return(1); | |
277 | else | |
278 | return(0); | |
279 | } | |
280 | ||
58964a49 RE |
281 | #define ITEM_SEP(a) \ |
282 | (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) | |
283 | ||
284 | static void ll_append_tail(head,curr,tail) | |
285 | CIPHER_ORDER **head,*curr,**tail; | |
286 | { | |
287 | if (curr == *tail) return; | |
288 | if (curr == *head) | |
289 | *head=curr->next; | |
290 | if (curr->prev != NULL) | |
291 | curr->prev->next=curr->next; | |
292 | if (curr->next != NULL) /* should always be true */ | |
293 | curr->next->prev=curr->prev; | |
294 | (*tail)->next=curr; | |
295 | curr->prev= *tail; | |
296 | curr->next=NULL; | |
297 | *tail=curr; | |
298 | } | |
299 | ||
d02b48c6 RE |
300 | STACK *ssl_create_cipher_list(ssl_method,cipher_list,cipher_list_by_id,str) |
301 | SSL_METHOD *ssl_method; | |
302 | STACK **cipher_list,**cipher_list_by_id; | |
303 | char *str; | |
304 | { | |
305 | SSL_CIPHER *c; | |
306 | char *l; | |
307 | STACK *ret=NULL,*ok=NULL; | |
308 | #define CL_BUF 40 | |
309 | char buf[CL_BUF]; | |
310 | char *tmp_str=NULL; | |
311 | unsigned long mask,algorithms,ma; | |
312 | char *start; | |
313 | int i,j,k,num=0,ch,multi; | |
314 | unsigned long al; | |
315 | STACK *ca_list=NULL; | |
58964a49 | 316 | int current_x,num_x; |
d02b48c6 | 317 | CIPHER_CHOICE *ops=NULL; |
58964a49 RE |
318 | CIPHER_ORDER *list=NULL,*head=NULL,*tail=NULL,*curr,*tail2,*curr2; |
319 | int list_num; | |
320 | int type; | |
d02b48c6 RE |
321 | SSL_CIPHER c_tmp,*cp; |
322 | ||
323 | if (str == NULL) return(NULL); | |
324 | ||
325 | if (strncmp(str,"DEFAULT",7) == 0) | |
326 | { | |
327 | i=strlen(str)+2+strlen(SSL_DEFAULT_CIPHER_LIST); | |
328 | if ((tmp_str=Malloc(i)) == NULL) | |
329 | { | |
330 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); | |
331 | goto err; | |
332 | } | |
333 | strcpy(tmp_str,SSL_DEFAULT_CIPHER_LIST); | |
58964a49 | 334 | strcat(tmp_str,":"); |
d02b48c6 RE |
335 | strcat(tmp_str,&(str[7])); |
336 | str=tmp_str; | |
337 | } | |
338 | if (init_ciphers) load_ciphers(); | |
339 | ||
340 | num=ssl_method->num_ciphers(); | |
341 | ||
342 | if ((ret=(STACK *)sk_new(NULL)) == NULL) goto err; | |
d02b48c6 RE |
343 | if ((ca_list=(STACK *)sk_new(cmp_by_name)) == NULL) goto err; |
344 | ||
345 | mask =SSL_kFZA; | |
346 | #ifdef NO_RSA | |
347 | mask|=SSL_aRSA|SSL_kRSA; | |
348 | #endif | |
349 | #ifdef NO_DSA | |
350 | mask|=SSL_aDSS; | |
351 | #endif | |
352 | #ifdef NO_DH | |
353 | mask|=SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH; | |
354 | #endif | |
355 | ||
356 | #ifndef SSL_ALLOW_ENULL | |
357 | mask|=SSL_eNULL; | |
358 | #endif | |
359 | ||
360 | mask|=(ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL)?SSL_DES :0; | |
361 | mask|=(ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL)?SSL_3DES:0; | |
362 | mask|=(ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL)?SSL_RC4 :0; | |
363 | mask|=(ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL)?SSL_RC2 :0; | |
364 | mask|=(ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL)?SSL_IDEA:0; | |
365 | mask|=(ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL)?SSL_eFZA:0; | |
366 | ||
367 | mask|=(ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL)?SSL_MD5 :0; | |
d02b48c6 RE |
368 | mask|=(ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL)?SSL_SHA1:0; |
369 | ||
58964a49 RE |
370 | if ((list=(CIPHER_ORDER *)Malloc(sizeof(CIPHER_ORDER)*num)) == NULL) |
371 | goto err; | |
372 | ||
d02b48c6 | 373 | /* Get the initial list of ciphers */ |
58964a49 | 374 | list_num=0; |
d02b48c6 RE |
375 | for (i=0; i<num; i++) |
376 | { | |
377 | c=ssl_method->get_cipher((unsigned int)i); | |
378 | /* drop those that use any of that is not available */ | |
379 | if ((c != NULL) && c->valid && !(c->algorithms & mask)) | |
380 | { | |
58964a49 RE |
381 | list[list_num].cipher=c; |
382 | list[list_num].next=NULL; | |
383 | list[list_num].prev=NULL; | |
384 | list[list_num].active=0; | |
385 | list_num++; | |
d02b48c6 RE |
386 | if (!sk_push(ca_list,(char *)c)) goto err; |
387 | } | |
388 | } | |
58964a49 RE |
389 | |
390 | for (i=1; i<list_num-1; i++) | |
391 | { | |
392 | list[i].prev= &(list[i-1]); | |
393 | list[i].next= &(list[i+1]); | |
394 | } | |
395 | if (list_num > 0) | |
396 | { | |
397 | head= &(list[0]); | |
398 | head->prev=NULL; | |
399 | head->next= &(list[1]); | |
400 | tail= &(list[list_num-1]); | |
401 | tail->prev= &(list[list_num-2]); | |
402 | tail->next=NULL; | |
403 | } | |
d02b48c6 RE |
404 | |
405 | /* special case */ | |
406 | cipher_aliases[0].algorithms= ~mask; | |
407 | ||
408 | /* get the aliases */ | |
409 | k=sizeof(cipher_aliases)/sizeof(SSL_CIPHER); | |
410 | for (j=0; j<k; j++) | |
411 | { | |
412 | al=cipher_aliases[j].algorithms; | |
413 | /* Drop those that are not relevent */ | |
414 | if ((al & mask) == al) continue; | |
415 | if (!sk_push(ca_list,(char *)&(cipher_aliases[j]))) goto err; | |
416 | } | |
417 | ||
418 | /* ca_list now holds a 'stack' of SSL_CIPHERS, some real, some | |
419 | * 'aliases' */ | |
420 | ||
421 | /* how many parameters are there? */ | |
422 | num=1; | |
423 | for (l=str; *l; l++) | |
58964a49 RE |
424 | if (ITEM_SEP(*l)) |
425 | num++; | |
d02b48c6 RE |
426 | ops=(CIPHER_CHOICE *)Malloc(sizeof(CIPHER_CHOICE)*num); |
427 | if (ops == NULL) goto err; | |
428 | memset(ops,0,sizeof(CIPHER_CHOICE)*num); | |
d02b48c6 RE |
429 | |
430 | /* we now parse the input string and create our operations */ | |
431 | l=str; | |
432 | i=0; | |
433 | current_x=0; | |
434 | ||
435 | for (;;) | |
436 | { | |
437 | ch= *l; | |
58964a49 RE |
438 | |
439 | if (ch == '\0') break; | |
440 | ||
d02b48c6 RE |
441 | if (ch == '-') |
442 | { j=CIPHER_DEL; l++; } | |
443 | else if (ch == '+') | |
58964a49 | 444 | { j=CIPHER_ORD; l++; } |
d02b48c6 RE |
445 | else if (ch == '!') |
446 | { j=CIPHER_KILL; l++; } | |
447 | else | |
448 | { j=CIPHER_ADD; } | |
449 | ||
58964a49 | 450 | if (ITEM_SEP(ch)) |
d02b48c6 RE |
451 | { |
452 | l++; | |
453 | continue; | |
454 | } | |
455 | ops[current_x].type=j; | |
456 | ops[current_x].algorithms=0; | |
457 | ops[current_x].mask=0; | |
458 | ||
459 | start=l; | |
460 | for (;;) | |
461 | { | |
462 | ch= *l; | |
463 | i=0; | |
464 | while ( ((ch >= 'A') && (ch <= 'Z')) || | |
465 | ((ch >= '0') && (ch <= '9')) || | |
466 | ((ch >= 'a') && (ch <= 'z')) || | |
467 | (ch == '-')) | |
468 | { | |
469 | buf[i]=ch; | |
470 | ch= *(++l); | |
471 | i++; | |
472 | if (i >= (CL_BUF-2)) break; | |
473 | } | |
474 | buf[i]='\0'; | |
d02b48c6 RE |
475 | |
476 | /* check for multi-part specification */ | |
58964a49 RE |
477 | if (ch == '+') |
478 | { | |
479 | multi=1; | |
480 | l++; | |
481 | } | |
482 | else | |
483 | multi=0; | |
d02b48c6 RE |
484 | |
485 | c_tmp.name=buf; | |
486 | j=sk_find(ca_list,(char *)&c_tmp); | |
487 | if (j < 0) | |
58964a49 | 488 | goto end_loop; |
d02b48c6 RE |
489 | |
490 | cp=(SSL_CIPHER *)sk_value(ca_list,j); | |
491 | ops[current_x].algorithms|=cp->algorithms; | |
492 | /* We add the SSL_SSL_MASK so we can match the | |
493 | * SSLv2 and SSLv3 versions of RC4-MD5 */ | |
494 | ops[current_x].mask|=cp->mask; | |
495 | if (!multi) break; | |
496 | } | |
497 | current_x++; | |
498 | if (ch == '\0') break; | |
58964a49 RE |
499 | end_loop: |
500 | /* Make sure we scan until the next valid start point */ | |
501 | while ((*l != '\0') && ITEM_SEP(*l)) | |
502 | l++; | |
d02b48c6 RE |
503 | } |
504 | ||
505 | num_x=current_x; | |
506 | current_x=0; | |
507 | ||
58964a49 RE |
508 | /* We will now process the list of ciphers, once for each category, to |
509 | * decide what we should do with it. */ | |
510 | for (j=0; j<num_x; j++) | |
d02b48c6 | 511 | { |
58964a49 RE |
512 | algorithms=ops[j].algorithms; |
513 | type=ops[j].type; | |
514 | mask=ops[j].mask; | |
515 | ||
516 | curr=head; | |
517 | curr2=head; | |
518 | tail2=tail; | |
519 | for (;;) | |
d02b48c6 | 520 | { |
58964a49 RE |
521 | if ((curr == NULL) || (curr == tail2)) break; |
522 | curr=curr2; | |
523 | curr2=curr->next; | |
524 | ||
525 | cp=curr->cipher; | |
526 | ma=mask & cp->algorithms; | |
d02b48c6 RE |
527 | if ((ma == 0) || ((ma & algorithms) != ma)) |
528 | { | |
58964a49 | 529 | /* does not apply */ |
d02b48c6 RE |
530 | continue; |
531 | } | |
d02b48c6 RE |
532 | |
533 | /* add the cipher if it has not been added yet. */ | |
58964a49 | 534 | if (type == CIPHER_ADD) |
d02b48c6 | 535 | { |
58964a49 | 536 | if (!curr->active) |
d02b48c6 | 537 | { |
58964a49 RE |
538 | ll_append_tail(&head,curr,&tail); |
539 | curr->active=1; | |
d02b48c6 RE |
540 | } |
541 | } | |
542 | /* Move the added cipher to this location */ | |
58964a49 | 543 | else if (type == CIPHER_ORD) |
d02b48c6 | 544 | { |
58964a49 | 545 | if (curr->active) |
d02b48c6 | 546 | { |
58964a49 | 547 | ll_append_tail(&head,curr,&tail); |
d02b48c6 RE |
548 | } |
549 | } | |
58964a49 RE |
550 | else if (type == CIPHER_DEL) |
551 | curr->active=0; | |
552 | if (type == CIPHER_KILL) | |
d02b48c6 | 553 | { |
58964a49 RE |
554 | if (head == curr) |
555 | head=curr->next; | |
556 | else | |
557 | curr->prev->next=curr->next; | |
558 | if (tail == curr) | |
559 | tail=curr->prev; | |
560 | curr->active=0; | |
561 | if (curr->next != NULL) | |
562 | curr->next->prev=curr->prev; | |
563 | if (curr->prev != NULL) | |
564 | curr->prev->next=curr->next; | |
565 | curr->next=NULL; | |
566 | curr->prev=NULL; | |
d02b48c6 RE |
567 | } |
568 | } | |
569 | } | |
570 | ||
58964a49 | 571 | for (curr=head; curr != NULL; curr=curr->next) |
d02b48c6 | 572 | { |
58964a49 | 573 | if (curr->active) |
d02b48c6 | 574 | { |
58964a49 | 575 | sk_push(ret,(char *)curr->cipher); |
d02b48c6 | 576 | #ifdef CIPHER_DEBUG |
58964a49 | 577 | printf("<%s>\n",curr->cipher->name); |
d02b48c6 | 578 | #endif |
d02b48c6 RE |
579 | } |
580 | } | |
581 | ||
582 | if (cipher_list != NULL) | |
583 | { | |
584 | if (*cipher_list != NULL) | |
585 | sk_free(*cipher_list); | |
586 | *cipher_list=ret; | |
587 | } | |
588 | ||
589 | if (cipher_list_by_id != NULL) | |
590 | { | |
591 | if (*cipher_list_by_id != NULL) | |
592 | sk_free(*cipher_list_by_id); | |
593 | *cipher_list_by_id=sk_dup(ret); | |
594 | } | |
595 | ||
596 | if ( (cipher_list_by_id == NULL) || | |
597 | (*cipher_list_by_id == NULL) || | |
598 | (cipher_list == NULL) || | |
599 | (*cipher_list == NULL)) | |
600 | goto err; | |
601 | sk_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); | |
602 | ||
603 | ok=ret; | |
604 | ret=NULL; | |
605 | err: | |
606 | if (tmp_str) Free(tmp_str); | |
58964a49 | 607 | if (ops != NULL) Free(ops); |
d02b48c6 | 608 | if (ret != NULL) sk_free(ret); |
d02b48c6 | 609 | if (ca_list != NULL) sk_free(ca_list); |
58964a49 | 610 | if (list != NULL) Free(list); |
d02b48c6 RE |
611 | return(ok); |
612 | } | |
613 | ||
614 | char *SSL_CIPHER_description(cipher,buf,len) | |
615 | SSL_CIPHER *cipher; | |
616 | char *buf; | |
617 | int len; | |
618 | { | |
06ab81f9 | 619 | int _export,pkl,kl; |
d02b48c6 RE |
620 | char *ver,*exp; |
621 | char *kx,*au,*enc,*mac; | |
622 | unsigned long alg,alg2; | |
623 | static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; | |
624 | ||
625 | alg=cipher->algorithms; | |
626 | alg2=cipher->algorithm2; | |
627 | ||
06ab81f9 BL |
628 | _export=SSL_IS_EXPORT(alg); |
629 | pkl=SSL_EXPORT_PKEYLENGTH(alg); | |
630 | kl=SSL_EXPORT_KEYLENGTH(alg); | |
631 | exp=_export?" export":""; | |
d02b48c6 RE |
632 | |
633 | if (alg & SSL_SSLV2) | |
634 | ver="SSLv2"; | |
635 | else if (alg & SSL_SSLV3) | |
636 | ver="SSLv3"; | |
637 | else | |
638 | ver="unknown"; | |
639 | ||
640 | switch (alg&SSL_MKEY_MASK) | |
641 | { | |
642 | case SSL_kRSA: | |
06ab81f9 | 643 | kx=_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; |
d02b48c6 RE |
644 | break; |
645 | case SSL_kDHr: | |
646 | kx="DH/RSA"; | |
647 | break; | |
648 | case SSL_kDHd: | |
649 | kx="DH/DSS"; | |
650 | break; | |
651 | case SSL_kFZA: | |
652 | kx="Fortezza"; | |
653 | break; | |
654 | case SSL_kEDH: | |
06ab81f9 | 655 | kx=_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; |
d02b48c6 RE |
656 | break; |
657 | default: | |
658 | kx="unknown"; | |
659 | } | |
660 | ||
661 | switch (alg&SSL_AUTH_MASK) | |
662 | { | |
663 | case SSL_aRSA: | |
664 | au="RSA"; | |
665 | break; | |
666 | case SSL_aDSS: | |
667 | au="DSS"; | |
668 | break; | |
669 | case SSL_aDH: | |
670 | au="DH"; | |
671 | break; | |
672 | case SSL_aFZA: | |
673 | case SSL_aNULL: | |
674 | au="None"; | |
675 | break; | |
676 | default: | |
677 | au="unknown"; | |
678 | break; | |
679 | } | |
680 | ||
681 | switch (alg&SSL_ENC_MASK) | |
682 | { | |
683 | case SSL_DES: | |
06ab81f9 | 684 | enc=(_export && kl == 5)?"DES(40)":"DES(56)"; |
d02b48c6 RE |
685 | break; |
686 | case SSL_3DES: | |
687 | enc="3DES(168)"; | |
688 | break; | |
689 | case SSL_RC4: | |
06ab81f9 BL |
690 | enc=_export?(kl == 5 ? "RC4(40)" : "RC4(56)") |
691 | :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); | |
d02b48c6 RE |
692 | break; |
693 | case SSL_RC2: | |
06ab81f9 | 694 | enc=_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; |
d02b48c6 RE |
695 | break; |
696 | case SSL_IDEA: | |
697 | enc="IDEA(128)"; | |
698 | break; | |
699 | case SSL_eFZA: | |
700 | enc="Fortezza"; | |
701 | break; | |
702 | case SSL_eNULL: | |
703 | enc="None"; | |
704 | break; | |
705 | default: | |
706 | enc="unknown"; | |
707 | break; | |
708 | } | |
709 | ||
710 | switch (alg&SSL_MAC_MASK) | |
711 | { | |
712 | case SSL_MD5: | |
713 | mac="MD5"; | |
714 | break; | |
d02b48c6 RE |
715 | case SSL_SHA1: |
716 | mac="SHA1"; | |
717 | break; | |
718 | default: | |
719 | mac="unknown"; | |
720 | break; | |
721 | } | |
722 | ||
723 | if (buf == NULL) | |
724 | { | |
725 | buf=Malloc(128); | |
726 | if (buf == NULL) return("Malloc Error"); | |
727 | } | |
728 | else if (len < 128) | |
729 | return("Buffer too small"); | |
730 | ||
731 | sprintf(buf,format,cipher->name,ver,kx,au,enc,mac,exp); | |
732 | return(buf); | |
733 | } | |
734 | ||
735 | char *SSL_CIPHER_get_version(c) | |
736 | SSL_CIPHER *c; | |
737 | { | |
738 | int i; | |
739 | ||
58964a49 | 740 | if (c == NULL) return("(NONE)"); |
d02b48c6 RE |
741 | i=(int)(c->id>>24L); |
742 | if (i == 3) | |
58964a49 | 743 | return("TLSv1/SSLv3"); |
d02b48c6 RE |
744 | else if (i == 2) |
745 | return("SSLv2"); | |
746 | else | |
747 | return("unknown"); | |
748 | } | |
749 | ||
750 | /* return the actual cipher being used */ | |
751 | char *SSL_CIPHER_get_name(c) | |
752 | SSL_CIPHER *c; | |
753 | { | |
754 | if (c != NULL) | |
755 | return(c->name); | |
756 | return("(NONE)"); | |
757 | } | |
758 | ||
759 | /* number of bits for symetric cipher */ | |
760 | int SSL_CIPHER_get_bits(c,alg_bits) | |
761 | SSL_CIPHER *c; | |
762 | int *alg_bits; | |
763 | { | |
764 | int ret=0,a=0; | |
765 | EVP_CIPHER *enc; | |
766 | EVP_MD *md; | |
413c4f45 | 767 | SSL_SESSION ss; |
d02b48c6 RE |
768 | |
769 | if (c != NULL) | |
770 | { | |
413c4f45 MC |
771 | ss.cipher=c; |
772 | if (!ssl_cipher_get_evp(&ss,&enc,&md,NULL)) | |
d02b48c6 RE |
773 | return(0); |
774 | ||
775 | a=EVP_CIPHER_key_length(enc)*8; | |
776 | ||
06ab81f9 | 777 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 | 778 | { |
06ab81f9 | 779 | ret=SSL_C_EXPORT_KEYLENGTH(c)*8; |
d02b48c6 RE |
780 | } |
781 | else | |
782 | { | |
783 | if (c->algorithm2 & SSL2_CF_8_BYTE_ENC) | |
784 | ret=64; | |
785 | else | |
786 | ret=a; | |
787 | } | |
788 | } | |
789 | ||
790 | if (alg_bits != NULL) *alg_bits=a; | |
791 | ||
792 | return(ret); | |
793 | } | |
794 | ||
413c4f45 MC |
795 | SSL_COMP *ssl3_comp_find(sk,n) |
796 | STACK *sk; | |
797 | int n; | |
798 | { | |
799 | SSL_COMP *ctmp; | |
800 | int i,nn; | |
801 | ||
802 | if ((n == 0) || (sk == NULL)) return(NULL); | |
803 | nn=sk_num(sk); | |
804 | for (i=0; i<nn; i++) | |
805 | { | |
806 | ctmp=(SSL_COMP *)sk_value(sk,i); | |
807 | if (ctmp->id == n) | |
808 | return(ctmp); | |
809 | } | |
810 | return(NULL); | |
811 | } | |
812 | ||
813 | static int sk_comp_cmp(a,b) | |
814 | SSL_COMP **a,**b; | |
815 | { | |
816 | return((*a)->id-(*b)->id); | |
817 | } | |
818 | ||
819 | STACK *SSL_COMP_get_compression_methods() | |
820 | { | |
821 | return(ssl_comp_methods); | |
822 | } | |
823 | ||
824 | int SSL_COMP_add_compression_method(id,cm) | |
825 | int id; | |
826 | COMP_METHOD *cm; | |
827 | { | |
828 | SSL_COMP *comp; | |
829 | STACK *sk; | |
830 | ||
831 | comp=(SSL_COMP *)Malloc(sizeof(SSL_COMP)); | |
832 | comp->id=id; | |
833 | comp->method=cm; | |
834 | if (ssl_comp_methods == NULL) | |
835 | sk=ssl_comp_methods=sk_new(sk_comp_cmp); | |
836 | else | |
837 | sk=ssl_comp_methods; | |
838 | if ((sk == NULL) || !sk_push(sk,(char *)comp)) | |
839 | { | |
840 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); | |
841 | return(0); | |
842 | } | |
843 | else | |
844 | return(1); | |
845 | } | |
846 |