2 /* Copyright (C) 1995-1997 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_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]={
84 typedef struct cipher_sort_st
93 #define CIPHER_ORDER 4
95 typedef struct cipher_choice_st
98 unsigned long algorithms;
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},
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},
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},
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},
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},
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},
147 static int init_ciphers=1;
148 static void load_ciphers();
150 static int cmp_by_name(a,b)
153 return(strcmp((*a)->name,(*b)->name));
156 static void load_ciphers()
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);
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);
178 int ssl_cipher_get_evp(c,enc,md)
185 if (c == NULL) return(0);
187 switch (c->algorithms & SSL_ENC_MASK)
213 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
217 if (i == SSL_ENC_NULL_IDX)
220 *enc=ssl_cipher_methods[i];
223 switch (c->algorithms & SSL_MAC_MASK)
238 if ((i < 0) || (i > SSL_MD_NUM_IDX))
241 *md=ssl_digest_methods[i];
243 if ((*enc != NULL) && (*md != NULL))
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;
256 STACK *ret=NULL,*ok=NULL;
260 unsigned long mask,algorithms,ma;
262 int i,j,k,num=0,ch,multi;
266 int old_x,old_y,current_x,num_x;
267 CIPHER_CHOICE *ops=NULL;
268 SSL_CIPHER c_tmp,*cp;
270 if (str == NULL) return(NULL);
272 if (strncmp(str,"DEFAULT",7) == 0)
274 i=strlen(str)+2+strlen(SSL_DEFAULT_CIPHER_LIST);
275 if ((tmp_str=Malloc(i)) == NULL)
277 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
280 strcpy(tmp_str,SSL_DEFAULT_CIPHER_LIST);
281 strcat(tmp_str,&(str[7]));
284 if (init_ciphers) load_ciphers();
286 num=ssl_method->num_ciphers();
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;
294 mask|=SSL_aRSA|SSL_kRSA;
300 mask|=SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
303 #ifndef SSL_ALLOW_ENULL
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;
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;
318 /* Get the initial list of ciphers */
319 for (i=0; i<num; i++)
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))
325 if (!sk_push(c_list,(char *)c)) goto err;
326 if (!sk_push(ca_list,(char *)c)) goto err;
331 cipher_aliases[0].algorithms= ~mask;
333 /* get the aliases */
334 k=sizeof(cipher_aliases)/sizeof(SSL_CIPHER);
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;
343 /* ca_list now holds a 'stack' of SSL_CIPHERS, some real, some
346 /* how many parameters are there? */
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;
356 /* we now parse the input string and create our operations */
365 { j=CIPHER_DEL; l++; }
367 { j=CIPHER_ORDER; l++; }
369 { j=CIPHER_KILL; l++; }
378 ops[current_x].type=j;
379 ops[current_x].algorithms=0;
380 ops[current_x].mask=0;
387 while ( ((ch >= 'A') && (ch <= 'Z')) ||
388 ((ch >= '0') && (ch <= '9')) ||
389 ((ch >= 'a') && (ch <= 'z')) ||
395 if (i >= (CL_BUF-2)) break;
400 /* check for multi-part specification */
401 multi=(ch == '+')?1:0;
404 j=sk_find(ca_list,(char *)&c_tmp);
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;
421 if (ch == '\0') break;
431 for (i=0; i<sk_num(c_list); i++)
435 cp=(SSL_CIPHER *)sk_value(c_list,i);
437 printf("[%s]\n",cp->name);
439 for (j=0; j<num_x; j++)
441 algorithms=ops[j].algorithms;
442 ma=ops[j].mask & cp->algorithms;
444 printf(" %s %08lX&%08lX==0 || %08lX != %08lX \n",
445 cp->name,ops[j].mask,cp->algorithms,ma,algorithms);
447 if ((ma == 0) || ((ma & algorithms) != ma))
453 printf(">>%s\n",cp->name);
456 /* add the cipher if it has not been added yet. */
462 old_y=sk_num(ops[j].order);
463 sk_push(ops[j].order,(char *)cp);
466 /* Move the added cipher to this location */
467 else if (k == CIPHER_ORDER)
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);
477 /* Remove added cipher */
478 else if ((k == CIPHER_DEL) || (k == CIPHER_KILL))
482 sk_value(ops[old_x].order,old_y)=NULL;
485 if (k == CIPHER_KILL)
491 for (i=0; i<num_x; i++)
493 for (j=0; j<sk_num(ops[i].order); j++)
495 cp=(SSL_CIPHER *)sk_value(ops[i].order,j);
498 sk_push(ret,(char *)cp);
500 printf("<%s>\n",cp->name);
506 if (cipher_list != NULL)
508 if (*cipher_list != NULL)
509 sk_free(*cipher_list);
513 if (cipher_list_by_id != NULL)
515 if (*cipher_list_by_id != NULL)
516 sk_free(*cipher_list_by_id);
517 *cipher_list_by_id=sk_dup(ret);
520 if ( (cipher_list_by_id == NULL) ||
521 (*cipher_list_by_id == NULL) ||
522 (cipher_list == NULL) ||
523 (*cipher_list == NULL))
525 sk_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
530 if (tmp_str) Free(tmp_str);
533 for (i=0; i<num; i++)
534 if (ops[i].order != NULL)
535 sk_free(ops[i].order);
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);
544 char *SSL_CIPHER_description(cipher,buf,len)
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";
555 alg=cipher->algorithms;
556 alg2=cipher->algorithm2;
558 export=(alg&SSL_EXP)?1:0;
559 exp=(export)?" export":"";
563 else if (alg & SSL_SSLV3)
568 switch (alg&SSL_MKEY_MASK)
571 kx=(export)?"RSA(512)":"RSA";
583 kx=(export)?"DH(512)":"DH";
589 switch (alg&SSL_AUTH_MASK)
609 switch (alg&SSL_ENC_MASK)
612 enc=export?"DES(40)":"DES(56)";
618 enc=export?"RC4(40)":((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
621 enc=export?"RC2(40)":"RC2(128)";
637 switch (alg&SSL_MAC_MASK)
656 if (buf == NULL) return("Malloc Error");
659 return("Buffer too small");
661 sprintf(buf,format,cipher->name,ver,kx,au,enc,mac,exp);
665 char *SSL_CIPHER_get_version(c)
679 /* return the actual cipher being used */
680 char *SSL_CIPHER_get_name(c)
688 /* number of bits for symetric cipher */
689 int SSL_CIPHER_get_bits(c,alg_bits)
699 if (!ssl_cipher_get_evp(c,&enc,&md))
702 a=EVP_CIPHER_key_length(enc)*8;
704 if (c->algorithms & SSL_EXP)
710 if (c->algorithm2 & SSL2_CF_8_BYTE_ENC)
717 if (alg_bits != NULL) *alg_bits=a;