2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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
72 static EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
73 NULL,NULL,NULL,NULL,NULL,NULL,
76 #define SSL_MD_MD5_IDX 0
77 #define SSL_MD_SHA1_IDX 1
78 #define SSL_MD_NUM_IDX 2
79 static EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
83 typedef struct cipher_sort_st
94 typedef struct cipher_choice_st
97 unsigned long algorithms;
102 typedef struct cipher_order_st
107 struct cipher_order_st *next,*prev;
110 static SSL_CIPHER cipher_aliases[]={
111 {0,SSL_TXT_ALL, 0,SSL_ALL, 0,SSL_ALL}, /* must be first */
112 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,SSL_MKEY_MASK},
113 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,SSL_MKEY_MASK},
114 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,SSL_MKEY_MASK},
115 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,SSL_MKEY_MASK},
116 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,SSL_MKEY_MASK},
117 {0,SSL_TXT_DH, 0,SSL_DH, 0,SSL_MKEY_MASK},
118 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,SSL_MKEY_MASK|SSL_AUTH_MASK},
120 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,SSL_AUTH_MASK},
121 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,SSL_AUTH_MASK},
122 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,SSL_AUTH_MASK},
123 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,SSL_AUTH_MASK},
124 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,SSL_AUTH_MASK},
125 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,SSL_AUTH_MASK},
127 {0,SSL_TXT_DES, 0,SSL_DES, 0,SSL_ENC_MASK},
128 {0,SSL_TXT_3DES,0,SSL_3DES, 0,SSL_ENC_MASK},
129 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,SSL_ENC_MASK},
130 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,SSL_ENC_MASK},
131 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,SSL_ENC_MASK},
132 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,SSL_ENC_MASK},
133 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,SSL_ENC_MASK},
135 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,SSL_MAC_MASK},
136 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,SSL_MAC_MASK},
137 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,SSL_MAC_MASK},
139 {0,SSL_TXT_NULL,0,SSL_NULL, 0,SSL_ENC_MASK},
140 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK},
141 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,SSL_AUTH_MASK|SSL_MKEY_MASK},
142 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK},
144 {0,SSL_TXT_EXP, 0,SSL_EXP, 0,SSL_EXP_MASK},
145 {0,SSL_TXT_EXPORT,0,SSL_EXPORT,0,SSL_EXP_MASK},
146 {0,SSL_TXT_SSLV2,0,SSL_SSLV2,0,SSL_SSL_MASK},
147 {0,SSL_TXT_SSLV3,0,SSL_SSLV3,0,SSL_SSL_MASK},
148 {0,SSL_TXT_LOW, 0,SSL_LOW,0,SSL_STRONG_MASK},
149 {0,SSL_TXT_MEDIUM,0,SSL_MEDIUM,0,SSL_STRONG_MASK},
150 {0,SSL_TXT_HIGH, 0,SSL_HIGH,0,SSL_STRONG_MASK},
153 static int init_ciphers=1;
154 static void load_ciphers();
156 static int cmp_by_name(a,b)
159 return(strcmp((*a)->name,(*b)->name));
162 static void load_ciphers()
165 ssl_cipher_methods[SSL_ENC_DES_IDX]=
166 EVP_get_cipherbyname(SN_des_cbc);
167 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
168 EVP_get_cipherbyname(SN_des_ede3_cbc);
169 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
170 EVP_get_cipherbyname(SN_rc4);
171 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
172 EVP_get_cipherbyname(SN_rc2_cbc);
173 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
174 EVP_get_cipherbyname(SN_idea_cbc);
176 ssl_digest_methods[SSL_MD_MD5_IDX]=
177 EVP_get_digestbyname(SN_md5);
178 ssl_digest_methods[SSL_MD_SHA1_IDX]=
179 EVP_get_digestbyname(SN_sha1);
182 int ssl_cipher_get_evp(c,enc,md)
189 if (c == NULL) return(0);
191 switch (c->algorithms & SSL_ENC_MASK)
217 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
221 if (i == SSL_ENC_NULL_IDX)
224 *enc=ssl_cipher_methods[i];
227 switch (c->algorithms & SSL_MAC_MASK)
239 if ((i < 0) || (i > SSL_MD_NUM_IDX))
242 *md=ssl_digest_methods[i];
244 if ((*enc != NULL) && (*md != NULL))
250 #define ITEM_SEP(a) \
251 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
253 static void ll_append_tail(head,curr,tail)
254 CIPHER_ORDER **head,*curr,**tail;
256 if (curr == *tail) return;
259 if (curr->prev != NULL)
260 curr->prev->next=curr->next;
261 if (curr->next != NULL) /* should always be true */
262 curr->next->prev=curr->prev;
269 STACK *ssl_create_cipher_list(ssl_method,cipher_list,cipher_list_by_id,str)
270 SSL_METHOD *ssl_method;
271 STACK **cipher_list,**cipher_list_by_id;
276 STACK *ret=NULL,*ok=NULL;
280 unsigned long mask,algorithms,ma;
282 int i,j,k,num=0,ch,multi;
286 CIPHER_CHOICE *ops=NULL;
287 CIPHER_ORDER *list=NULL,*head=NULL,*tail=NULL,*curr,*tail2,*curr2;
290 SSL_CIPHER c_tmp,*cp;
292 if (str == NULL) return(NULL);
294 if (strncmp(str,"DEFAULT",7) == 0)
296 i=strlen(str)+2+strlen(SSL_DEFAULT_CIPHER_LIST);
297 if ((tmp_str=Malloc(i)) == NULL)
299 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
302 strcpy(tmp_str,SSL_DEFAULT_CIPHER_LIST);
304 strcat(tmp_str,&(str[7]));
307 if (init_ciphers) load_ciphers();
309 num=ssl_method->num_ciphers();
311 if ((ret=(STACK *)sk_new(NULL)) == NULL) goto err;
312 if ((ca_list=(STACK *)sk_new(cmp_by_name)) == NULL) goto err;
316 mask|=SSL_aRSA|SSL_kRSA;
322 mask|=SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
325 #ifndef SSL_ALLOW_ENULL
329 mask|=(ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL)?SSL_DES :0;
330 mask|=(ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL)?SSL_3DES:0;
331 mask|=(ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL)?SSL_RC4 :0;
332 mask|=(ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL)?SSL_RC2 :0;
333 mask|=(ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL)?SSL_IDEA:0;
334 mask|=(ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL)?SSL_eFZA:0;
336 mask|=(ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL)?SSL_MD5 :0;
337 mask|=(ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL)?SSL_SHA1:0;
339 if ((list=(CIPHER_ORDER *)Malloc(sizeof(CIPHER_ORDER)*num)) == NULL)
342 /* Get the initial list of ciphers */
344 for (i=0; i<num; i++)
346 c=ssl_method->get_cipher((unsigned int)i);
347 /* drop those that use any of that is not available */
348 if ((c != NULL) && c->valid && !(c->algorithms & mask))
350 list[list_num].cipher=c;
351 list[list_num].next=NULL;
352 list[list_num].prev=NULL;
353 list[list_num].active=0;
355 if (!sk_push(ca_list,(char *)c)) goto err;
359 for (i=1; i<list_num-1; i++)
361 list[i].prev= &(list[i-1]);
362 list[i].next= &(list[i+1]);
368 head->next= &(list[1]);
369 tail= &(list[list_num-1]);
370 tail->prev= &(list[list_num-2]);
375 cipher_aliases[0].algorithms= ~mask;
377 /* get the aliases */
378 k=sizeof(cipher_aliases)/sizeof(SSL_CIPHER);
381 al=cipher_aliases[j].algorithms;
382 /* Drop those that are not relevent */
383 if ((al & mask) == al) continue;
384 if (!sk_push(ca_list,(char *)&(cipher_aliases[j]))) goto err;
387 /* ca_list now holds a 'stack' of SSL_CIPHERS, some real, some
390 /* how many parameters are there? */
395 ops=(CIPHER_CHOICE *)Malloc(sizeof(CIPHER_CHOICE)*num);
396 if (ops == NULL) goto err;
397 memset(ops,0,sizeof(CIPHER_CHOICE)*num);
399 /* we now parse the input string and create our operations */
408 if (ch == '\0') break;
411 { j=CIPHER_DEL; l++; }
413 { j=CIPHER_ORD; l++; }
415 { j=CIPHER_KILL; l++; }
424 ops[current_x].type=j;
425 ops[current_x].algorithms=0;
426 ops[current_x].mask=0;
433 while ( ((ch >= 'A') && (ch <= 'Z')) ||
434 ((ch >= '0') && (ch <= '9')) ||
435 ((ch >= 'a') && (ch <= 'z')) ||
441 if (i >= (CL_BUF-2)) break;
445 /* check for multi-part specification */
455 j=sk_find(ca_list,(char *)&c_tmp);
459 cp=(SSL_CIPHER *)sk_value(ca_list,j);
460 ops[current_x].algorithms|=cp->algorithms;
461 /* We add the SSL_SSL_MASK so we can match the
462 * SSLv2 and SSLv3 versions of RC4-MD5 */
463 ops[current_x].mask|=cp->mask;
467 if (ch == '\0') break;
469 /* Make sure we scan until the next valid start point */
470 while ((*l != '\0') && ITEM_SEP(*l))
477 /* We will now process the list of ciphers, once for each category, to
478 * decide what we should do with it. */
479 for (j=0; j<num_x; j++)
481 algorithms=ops[j].algorithms;
490 if ((curr == NULL) || (curr == tail2)) break;
495 ma=mask & cp->algorithms;
496 if ((ma == 0) || ((ma & algorithms) != ma))
502 /* add the cipher if it has not been added yet. */
503 if (type == CIPHER_ADD)
507 ll_append_tail(&head,curr,&tail);
511 /* Move the added cipher to this location */
512 else if (type == CIPHER_ORD)
516 ll_append_tail(&head,curr,&tail);
519 else if (type == CIPHER_DEL)
521 if (type == CIPHER_KILL)
526 curr->prev->next=curr->next;
530 if (curr->next != NULL)
531 curr->next->prev=curr->prev;
532 if (curr->prev != NULL)
533 curr->prev->next=curr->next;
540 for (curr=head; curr != NULL; curr=curr->next)
544 sk_push(ret,(char *)curr->cipher);
546 printf("<%s>\n",curr->cipher->name);
551 if (cipher_list != NULL)
553 if (*cipher_list != NULL)
554 sk_free(*cipher_list);
558 if (cipher_list_by_id != NULL)
560 if (*cipher_list_by_id != NULL)
561 sk_free(*cipher_list_by_id);
562 *cipher_list_by_id=sk_dup(ret);
565 if ( (cipher_list_by_id == NULL) ||
566 (*cipher_list_by_id == NULL) ||
567 (cipher_list == NULL) ||
568 (*cipher_list == NULL))
570 sk_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
575 if (tmp_str) Free(tmp_str);
576 if (ops != NULL) Free(ops);
577 if (ret != NULL) sk_free(ret);
578 if (ca_list != NULL) sk_free(ca_list);
579 if (list != NULL) Free(list);
583 char *SSL_CIPHER_description(cipher,buf,len)
590 char *kx,*au,*enc,*mac;
591 unsigned long alg,alg2;
592 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
594 alg=cipher->algorithms;
595 alg2=cipher->algorithm2;
597 export=(alg&SSL_EXP)?1:0;
598 exp=(export)?" export":"";
602 else if (alg & SSL_SSLV3)
607 switch (alg&SSL_MKEY_MASK)
610 kx=(export)?"RSA(512)":"RSA";
622 kx=(export)?"DH(512)":"DH";
628 switch (alg&SSL_AUTH_MASK)
648 switch (alg&SSL_ENC_MASK)
651 enc=export?"DES(40)":"DES(56)";
657 enc=export?"RC4(40)":((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
660 enc=export?"RC2(40)":"RC2(128)";
676 switch (alg&SSL_MAC_MASK)
692 if (buf == NULL) return("Malloc Error");
695 return("Buffer too small");
697 sprintf(buf,format,cipher->name,ver,kx,au,enc,mac,exp);
701 char *SSL_CIPHER_get_version(c)
706 if (c == NULL) return("(NONE)");
709 return("TLSv1/SSLv3");
716 /* return the actual cipher being used */
717 char *SSL_CIPHER_get_name(c)
725 /* number of bits for symetric cipher */
726 int SSL_CIPHER_get_bits(c,alg_bits)
736 if (!ssl_cipher_get_evp(c,&enc,&md))
739 a=EVP_CIPHER_key_length(enc)*8;
741 if (c->algorithms & SSL_EXP)
747 if (c->algorithm2 & SSL2_CF_8_BYTE_ENC)
754 if (alg_bits != NULL) *alg_bits=a;