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Diffstat (limited to 'crypto/openssl/ssl/ssl_ciph.c')
| -rw-r--r-- | crypto/openssl/ssl/ssl_ciph.c | 1138 |
1 files changed, 0 insertions, 1138 deletions
diff --git a/crypto/openssl/ssl/ssl_ciph.c b/crypto/openssl/ssl/ssl_ciph.c deleted file mode 100644 index c72be89e9ae3..000000000000 --- a/crypto/openssl/ssl/ssl_ciph.c +++ /dev/null @@ -1,1138 +0,0 @@ -/* ssl/ssl_ciph.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include <stdio.h> -#include <openssl/objects.h> -#include <openssl/comp.h> -#include "ssl_locl.h" - -#define SSL_ENC_DES_IDX 0 -#define SSL_ENC_3DES_IDX 1 -#define SSL_ENC_RC4_IDX 2 -#define SSL_ENC_RC2_IDX 3 -#define SSL_ENC_IDEA_IDX 4 -#define SSL_ENC_eFZA_IDX 5 -#define SSL_ENC_NULL_IDX 6 -#define SSL_ENC_AES128_IDX 7 -#define SSL_ENC_AES256_IDX 8 -#define SSL_ENC_NUM_IDX 9 - -static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ - NULL,NULL,NULL,NULL,NULL,NULL, - }; - -static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL; - -#define SSL_MD_MD5_IDX 0 -#define SSL_MD_SHA1_IDX 1 -#define SSL_MD_NUM_IDX 2 -static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ - NULL,NULL, - }; - -#define CIPHER_ADD 1 -#define CIPHER_KILL 2 -#define CIPHER_DEL 3 -#define CIPHER_ORD 4 -#define CIPHER_SPECIAL 5 - -typedef struct cipher_order_st - { - SSL_CIPHER *cipher; - int active; - int dead; - struct cipher_order_st *next,*prev; - } CIPHER_ORDER; - -static const SSL_CIPHER cipher_aliases[]={ - /* Don't include eNULL unless specifically enabled. */ - {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, /* must be first */ - {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, /* COMPLEMENT OF ALL */ - {0,SSL_TXT_CMPDEF,0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */ - {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0}, - {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0}, - - {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */ - {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0}, - {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0}, - - {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0}, - - {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0}, - {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0}, - {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0}, - - {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0}, - {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, - {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, - {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, - {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0}, - - {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0}, - {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0}, - {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0}, - - {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK}, - {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK}, - {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK}, - {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK}, - {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK}, - {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK}, - {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK}, - }; - -static int init_ciphers=1; - -static void load_ciphers(void) - { - init_ciphers=0; - ssl_cipher_methods[SSL_ENC_DES_IDX]= - EVP_get_cipherbyname(SN_des_cbc); - ssl_cipher_methods[SSL_ENC_3DES_IDX]= - EVP_get_cipherbyname(SN_des_ede3_cbc); - ssl_cipher_methods[SSL_ENC_RC4_IDX]= - EVP_get_cipherbyname(SN_rc4); - ssl_cipher_methods[SSL_ENC_RC2_IDX]= - EVP_get_cipherbyname(SN_rc2_cbc); - ssl_cipher_methods[SSL_ENC_IDEA_IDX]= - EVP_get_cipherbyname(SN_idea_cbc); - ssl_cipher_methods[SSL_ENC_AES128_IDX]= - EVP_get_cipherbyname(SN_aes_128_cbc); - ssl_cipher_methods[SSL_ENC_AES256_IDX]= - EVP_get_cipherbyname(SN_aes_256_cbc); - - ssl_digest_methods[SSL_MD_MD5_IDX]= - EVP_get_digestbyname(SN_md5); - ssl_digest_methods[SSL_MD_SHA1_IDX]= - EVP_get_digestbyname(SN_sha1); - } - -int ssl_cipher_get_evp(SSL_SESSION *s, const EVP_CIPHER **enc, - const EVP_MD **md, SSL_COMP **comp) - { - int i; - SSL_CIPHER *c; - - c=s->cipher; - if (c == NULL) return(0); - if (comp != NULL) - { - SSL_COMP ctmp; - - if (s->compress_meth == 0) - *comp=NULL; - else if (ssl_comp_methods == NULL) - { - /* bad */ - *comp=NULL; - } - else - { - - ctmp.id=s->compress_meth; - i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp); - if (i >= 0) - *comp=sk_SSL_COMP_value(ssl_comp_methods,i); - else - *comp=NULL; - } - } - - if ((enc == NULL) || (md == NULL)) return(0); - - switch (c->algorithms & SSL_ENC_MASK) - { - case SSL_DES: - i=SSL_ENC_DES_IDX; - break; - case SSL_3DES: - i=SSL_ENC_3DES_IDX; - break; - case SSL_RC4: - i=SSL_ENC_RC4_IDX; - break; - case SSL_RC2: - i=SSL_ENC_RC2_IDX; - break; - case SSL_IDEA: - i=SSL_ENC_IDEA_IDX; - break; - case SSL_eNULL: - i=SSL_ENC_NULL_IDX; - break; - case SSL_AES: - switch(c->alg_bits) - { - case 128: i=SSL_ENC_AES128_IDX; break; - case 256: i=SSL_ENC_AES256_IDX; break; - default: i=-1; break; - } - break; - default: - i= -1; - break; - } - - if ((i < 0) || (i > SSL_ENC_NUM_IDX)) - *enc=NULL; - else - { - if (i == SSL_ENC_NULL_IDX) - *enc=EVP_enc_null(); - else - *enc=ssl_cipher_methods[i]; - } - - switch (c->algorithms & SSL_MAC_MASK) - { - case SSL_MD5: - i=SSL_MD_MD5_IDX; - break; - case SSL_SHA1: - i=SSL_MD_SHA1_IDX; - break; - default: - i= -1; - break; - } - if ((i < 0) || (i > SSL_MD_NUM_IDX)) - *md=NULL; - else - *md=ssl_digest_methods[i]; - - if ((*enc != NULL) && (*md != NULL)) - return(1); - else - return(0); - } - -#define ITEM_SEP(a) \ - (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) - -static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, - CIPHER_ORDER **tail) - { - if (curr == *tail) return; - if (curr == *head) - *head=curr->next; - if (curr->prev != NULL) - curr->prev->next=curr->next; - if (curr->next != NULL) /* should always be true */ - curr->next->prev=curr->prev; - (*tail)->next=curr; - curr->prev= *tail; - curr->next=NULL; - *tail=curr; - } - -static unsigned long ssl_cipher_get_disabled(void) - { - unsigned long mask; - - mask = SSL_kFZA; -#ifdef OPENSSL_NO_RSA - mask |= SSL_aRSA|SSL_kRSA; -#endif -#ifdef OPENSSL_NO_DSA - mask |= SSL_aDSS; -#endif -#ifdef OPENSSL_NO_DH - mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH; -#endif -#ifdef OPENSSL_NO_KRB5 - mask |= SSL_kKRB5|SSL_aKRB5; -#endif - -#ifdef SSL_FORBID_ENULL - mask |= SSL_eNULL; -#endif - - mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0; - mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0; - mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0; - mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0; - mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0; - mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0; - mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0; - - mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0; - mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0; - - return(mask); - } - -static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, - int num_of_ciphers, unsigned long mask, CIPHER_ORDER *list, - CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) - { - int i, list_num; - SSL_CIPHER *c; - - /* - * We have num_of_ciphers descriptions compiled in, depending on the - * method selected (SSLv2 and/or SSLv3, TLSv1 etc). - * These will later be sorted in a linked list with at most num - * entries. - */ - - /* Get the initial list of ciphers */ - list_num = 0; /* actual count of ciphers */ - for (i = 0; i < num_of_ciphers; i++) - { - c = ssl_method->get_cipher(i); - /* drop those that use any of that is not available */ - if ((c != NULL) && c->valid && !(c->algorithms & mask)) - { - list[list_num].cipher = c; - list[list_num].next = NULL; - list[list_num].prev = NULL; - list[list_num].active = 0; - list_num++; -#ifdef KSSL_DEBUG - printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms); -#endif /* KSSL_DEBUG */ - /* - if (!sk_push(ca_list,(char *)c)) goto err; - */ - } - } - - /* - * Prepare linked list from list entries - */ - for (i = 1; i < list_num - 1; i++) - { - list[i].prev = &(list[i-1]); - list[i].next = &(list[i+1]); - } - if (list_num > 0) - { - (*head_p) = &(list[0]); - (*head_p)->prev = NULL; - (*head_p)->next = &(list[1]); - (*tail_p) = &(list[list_num - 1]); - (*tail_p)->prev = &(list[list_num - 2]); - (*tail_p)->next = NULL; - } - } - -static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list, - int num_of_group_aliases, unsigned long mask, - CIPHER_ORDER *head) - { - CIPHER_ORDER *ciph_curr; - SSL_CIPHER **ca_curr; - int i; - - /* - * First, add the real ciphers as already collected - */ - ciph_curr = head; - ca_curr = ca_list; - while (ciph_curr != NULL) - { - *ca_curr = ciph_curr->cipher; - ca_curr++; - ciph_curr = ciph_curr->next; - } - - /* - * Now we add the available ones from the cipher_aliases[] table. - * They represent either an algorithm, that must be fully - * supported (not match any bit in mask) or represent a cipher - * strength value (will be added in any case because algorithms=0). - */ - for (i = 0; i < num_of_group_aliases; i++) - { - if ((i == 0) || /* always fetch "ALL" */ - !(cipher_aliases[i].algorithms & mask)) - { - *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); - ca_curr++; - } - } - - *ca_curr = NULL; /* end of list */ - } - -static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask, - unsigned long algo_strength, unsigned long mask_strength, - int rule, int strength_bits, CIPHER_ORDER *list, - CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) - { - CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2; - SSL_CIPHER *cp; - unsigned long ma, ma_s; - -#ifdef CIPHER_DEBUG - printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n", - rule, algorithms, mask, algo_strength, mask_strength, - strength_bits); -#endif - - curr = head = *head_p; - curr2 = head; - tail2 = tail = *tail_p; - for (;;) - { - if ((curr == NULL) || (curr == tail2)) break; - curr = curr2; - curr2 = curr->next; - - cp = curr->cipher; - - /* - * Selection criteria is either the number of strength_bits - * or the algorithm used. - */ - if (strength_bits == -1) - { - ma = mask & cp->algorithms; - ma_s = mask_strength & cp->algo_strength; - -#ifdef CIPHER_DEBUG - printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength); - printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength); -#endif - /* - * Select: if none of the mask bit was met from the - * cipher or not all of the bits were met, the - * selection does not apply. - */ - if (((ma == 0) && (ma_s == 0)) || - ((ma & algorithms) != ma) || - ((ma_s & algo_strength) != ma_s)) - continue; /* does not apply */ - } - else if (strength_bits != cp->strength_bits) - continue; /* does not apply */ - -#ifdef CIPHER_DEBUG - printf("Action = %d\n", rule); -#endif - - /* add the cipher if it has not been added yet. */ - if (rule == CIPHER_ADD) - { - if (!curr->active) - { - ll_append_tail(&head, curr, &tail); - curr->active = 1; - } - } - /* Move the added cipher to this location */ - else if (rule == CIPHER_ORD) - { - if (curr->active) - { - ll_append_tail(&head, curr, &tail); - } - } - else if (rule == CIPHER_DEL) - curr->active = 0; - else if (rule == CIPHER_KILL) - { - if (head == curr) - head = curr->next; - else - curr->prev->next = curr->next; - if (tail == curr) - tail = curr->prev; - curr->active = 0; - if (curr->next != NULL) - curr->next->prev = curr->prev; - if (curr->prev != NULL) - curr->prev->next = curr->next; - curr->next = NULL; - curr->prev = NULL; - } - } - - *head_p = head; - *tail_p = tail; - } - -static int ssl_cipher_strength_sort(CIPHER_ORDER *list, CIPHER_ORDER **head_p, - CIPHER_ORDER **tail_p) - { - int max_strength_bits, i, *number_uses; - CIPHER_ORDER *curr; - - /* - * This routine sorts the ciphers with descending strength. The sorting - * must keep the pre-sorted sequence, so we apply the normal sorting - * routine as '+' movement to the end of the list. - */ - max_strength_bits = 0; - curr = *head_p; - while (curr != NULL) - { - if (curr->active && - (curr->cipher->strength_bits > max_strength_bits)) - max_strength_bits = curr->cipher->strength_bits; - curr = curr->next; - } - - number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); - if (!number_uses) - { - SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE); - return(0); - } - memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); - - /* - * Now find the strength_bits values actually used - */ - curr = *head_p; - while (curr != NULL) - { - if (curr->active) - number_uses[curr->cipher->strength_bits]++; - curr = curr->next; - } - /* - * Go through the list of used strength_bits values in descending - * order. - */ - for (i = max_strength_bits; i >= 0; i--) - if (number_uses[i] > 0) - ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i, - list, head_p, tail_p); - - OPENSSL_free(number_uses); - return(1); - } - -static int ssl_cipher_process_rulestr(const char *rule_str, - CIPHER_ORDER *list, CIPHER_ORDER **head_p, - CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list) - { - unsigned long algorithms, mask, algo_strength, mask_strength; - const char *l, *start, *buf; - int j, multi, found, rule, retval, ok, buflen; - char ch; - - retval = 1; - l = rule_str; - for (;;) - { - ch = *l; - - if (ch == '\0') - break; /* done */ - if (ch == '-') - { rule = CIPHER_DEL; l++; } - else if (ch == '+') - { rule = CIPHER_ORD; l++; } - else if (ch == '!') - { rule = CIPHER_KILL; l++; } - else if (ch == '@') - { rule = CIPHER_SPECIAL; l++; } - else - { rule = CIPHER_ADD; } - - if (ITEM_SEP(ch)) - { - l++; - continue; - } - - algorithms = mask = algo_strength = mask_strength = 0; - - start=l; - for (;;) - { - ch = *l; - buf = l; - buflen = 0; -#ifndef CHARSET_EBCDIC - while ( ((ch >= 'A') && (ch <= 'Z')) || - ((ch >= '0') && (ch <= '9')) || - ((ch >= 'a') && (ch <= 'z')) || - (ch == '-')) -#else - while ( isalnum(ch) || (ch == '-')) -#endif - { - ch = *(++l); - buflen++; - } - - if (buflen == 0) - { - /* - * We hit something we cannot deal with, - * it is no command or separator nor - * alphanumeric, so we call this an error. - */ - SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, - SSL_R_INVALID_COMMAND); - retval = found = 0; - l++; - break; - } - - if (rule == CIPHER_SPECIAL) - { - found = 0; /* unused -- avoid compiler warning */ - break; /* special treatment */ - } - - /* check for multi-part specification */ - if (ch == '+') - { - multi=1; - l++; - } - else - multi=0; - - /* - * Now search for the cipher alias in the ca_list. Be careful - * with the strncmp, because the "buflen" limitation - * will make the rule "ADH:SOME" and the cipher - * "ADH-MY-CIPHER" look like a match for buflen=3. - * So additionally check whether the cipher name found - * has the correct length. We can save a strlen() call: - * just checking for the '\0' at the right place is - * sufficient, we have to strncmp() anyway. - */ - j = found = 0; - while (ca_list[j]) - { - if ((ca_list[j]->name[buflen] == '\0') && - !strncmp(buf, ca_list[j]->name, buflen)) - { - found = 1; - break; - } - else - j++; - } - if (!found) - break; /* ignore this entry */ - - algorithms |= ca_list[j]->algorithms; - mask |= ca_list[j]->mask; - algo_strength |= ca_list[j]->algo_strength; - mask_strength |= ca_list[j]->mask_strength; - - if (!multi) break; - } - - /* - * Ok, we have the rule, now apply it - */ - if (rule == CIPHER_SPECIAL) - { /* special command */ - ok = 0; - if ((buflen == 8) && - !strncmp(buf, "STRENGTH", 8)) - ok = ssl_cipher_strength_sort(list, - head_p, tail_p); - else - SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, - SSL_R_INVALID_COMMAND); - if (ok == 0) - retval = 0; - /* - * We do not support any "multi" options - * together with "@", so throw away the - * rest of the command, if any left, until - * end or ':' is found. - */ - while ((*l != '\0') && ITEM_SEP(*l)) - l++; - } - else if (found) - { - ssl_cipher_apply_rule(algorithms, mask, - algo_strength, mask_strength, rule, -1, - list, head_p, tail_p); - } - else - { - while ((*l != '\0') && ITEM_SEP(*l)) - l++; - } - if (*l == '\0') break; /* done */ - } - - return(retval); - } - -STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, - STACK_OF(SSL_CIPHER) **cipher_list, - STACK_OF(SSL_CIPHER) **cipher_list_by_id, - const char *rule_str) - { - int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; - unsigned long disabled_mask; - STACK_OF(SSL_CIPHER) *cipherstack; - const char *rule_p; - CIPHER_ORDER *list = NULL, *head = NULL, *tail = NULL, *curr; - SSL_CIPHER **ca_list = NULL; - - /* - * Return with error if nothing to do. - */ - if (rule_str == NULL) return(NULL); - - if (init_ciphers) - { - CRYPTO_w_lock(CRYPTO_LOCK_SSL); - if (init_ciphers) load_ciphers(); - CRYPTO_w_unlock(CRYPTO_LOCK_SSL); - } - - /* - * To reduce the work to do we only want to process the compiled - * in algorithms, so we first get the mask of disabled ciphers. - */ - disabled_mask = ssl_cipher_get_disabled(); - - /* - * Now we have to collect the available ciphers from the compiled - * in ciphers. We cannot get more than the number compiled in, so - * it is used for allocation. - */ - num_of_ciphers = ssl_method->num_ciphers(); -#ifdef KSSL_DEBUG - printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers); -#endif /* KSSL_DEBUG */ - list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); - if (list == NULL) - { - SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); - return(NULL); /* Failure */ - } - - ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask, - list, &head, &tail); - - /* - * We also need cipher aliases for selecting based on the rule_str. - * There might be two types of entries in the rule_str: 1) names - * of ciphers themselves 2) aliases for groups of ciphers. - * For 1) we need the available ciphers and for 2) the cipher - * groups of cipher_aliases added together in one list (otherwise - * we would be happy with just the cipher_aliases table). - */ - num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); - num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; - ca_list = - (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); - if (ca_list == NULL) - { - OPENSSL_free(list); - SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); - return(NULL); /* Failure */ - } - ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask, - head); - - /* - * If the rule_string begins with DEFAULT, apply the default rule - * before using the (possibly available) additional rules. - */ - ok = 1; - rule_p = rule_str; - if (strncmp(rule_str,"DEFAULT",7) == 0) - { - ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, - list, &head, &tail, ca_list); - rule_p += 7; - if (*rule_p == ':') - rule_p++; - } - - if (ok && (strlen(rule_p) > 0)) - ok = ssl_cipher_process_rulestr(rule_p, list, &head, &tail, - ca_list); - - OPENSSL_free(ca_list); /* Not needed anymore */ - - if (!ok) - { /* Rule processing failure */ - OPENSSL_free(list); - return(NULL); - } - /* - * Allocate new "cipherstack" for the result, return with error - * if we cannot get one. - */ - if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) - { - OPENSSL_free(list); - return(NULL); - } - - /* - * The cipher selection for the list is done. The ciphers are added - * to the resulting precedence to the STACK_OF(SSL_CIPHER). - */ - for (curr = head; curr != NULL; curr = curr->next) - { - if (curr->active) - { - sk_SSL_CIPHER_push(cipherstack, curr->cipher); -#ifdef CIPHER_DEBUG - printf("<%s>\n",curr->cipher->name); -#endif - } - } - OPENSSL_free(list); /* Not needed any longer */ - - /* - * The following passage is a little bit odd. If pointer variables - * were supplied to hold STACK_OF(SSL_CIPHER) return information, - * the old memory pointed to is free()ed. Then, however, the - * cipher_list entry will be assigned just a copy of the returned - * cipher stack. For cipher_list_by_id a copy of the cipher stack - * will be created. See next comment... - */ - if (cipher_list != NULL) - { - if (*cipher_list != NULL) - sk_SSL_CIPHER_free(*cipher_list); - *cipher_list = cipherstack; - } - - if (cipher_list_by_id != NULL) - { - if (*cipher_list_by_id != NULL) - sk_SSL_CIPHER_free(*cipher_list_by_id); - *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack); - } - - /* - * Now it is getting really strange. If something failed during - * the previous pointer assignment or if one of the pointers was - * not requested, the error condition is met. That might be - * discussable. The strange thing is however that in this case - * the memory "ret" pointed to is "free()ed" and hence the pointer - * cipher_list becomes wild. The memory reserved for - * cipher_list_by_id however is not "free()ed" and stays intact. - */ - if ( (cipher_list_by_id == NULL) || - (*cipher_list_by_id == NULL) || - (cipher_list == NULL) || - (*cipher_list == NULL)) - { - sk_SSL_CIPHER_free(cipherstack); - return(NULL); - } - - sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); - - return(cipherstack); - } - -char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len) - { - int is_export,pkl,kl; - char *ver,*exp; - char *kx,*au,*enc,*mac; - unsigned long alg,alg2,alg_s; -#ifdef KSSL_DEBUG - static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n"; -#else - static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; -#endif /* KSSL_DEBUG */ - - alg=cipher->algorithms; - alg_s=cipher->algo_strength; - alg2=cipher->algorithm2; - - is_export=SSL_C_IS_EXPORT(cipher); - pkl=SSL_C_EXPORT_PKEYLENGTH(cipher); - kl=SSL_C_EXPORT_KEYLENGTH(cipher); - exp=is_export?" export":""; - - if (alg & SSL_SSLV2) - ver="SSLv2"; - else if (alg & SSL_SSLV3) - ver="SSLv3"; - else - ver="unknown"; - - switch (alg&SSL_MKEY_MASK) - { - case SSL_kRSA: - kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; - break; - case SSL_kDHr: - kx="DH/RSA"; - break; - case SSL_kDHd: - kx="DH/DSS"; - break; - case SSL_kKRB5: /* VRS */ - case SSL_KRB5: /* VRS */ - kx="KRB5"; - break; - case SSL_kFZA: - kx="Fortezza"; - break; - case SSL_kEDH: - kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; - break; - default: - kx="unknown"; - } - - switch (alg&SSL_AUTH_MASK) - { - case SSL_aRSA: - au="RSA"; - break; - case SSL_aDSS: - au="DSS"; - break; - case SSL_aDH: - au="DH"; - break; - case SSL_aKRB5: /* VRS */ - case SSL_KRB5: /* VRS */ - au="KRB5"; - break; - case SSL_aFZA: - case SSL_aNULL: - au="None"; - break; - default: - au="unknown"; - break; - } - - switch (alg&SSL_ENC_MASK) - { - case SSL_DES: - enc=(is_export && kl == 5)?"DES(40)":"DES(56)"; - break; - case SSL_3DES: - enc="3DES(168)"; - break; - case SSL_RC4: - enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)") - :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); - break; - case SSL_RC2: - enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; - break; - case SSL_IDEA: - enc="IDEA(128)"; - break; - case SSL_eFZA: - enc="Fortezza"; - break; - case SSL_eNULL: - enc="None"; - break; - case SSL_AES: - switch(cipher->strength_bits) - { - case 128: enc="AES(128)"; break; - case 192: enc="AES(192)"; break; - case 256: enc="AES(256)"; break; - default: enc="AES(?""?""?)"; break; - } - break; - default: - enc="unknown"; - break; - } - - switch (alg&SSL_MAC_MASK) - { - case SSL_MD5: - mac="MD5"; - break; - case SSL_SHA1: - mac="SHA1"; - break; - default: - mac="unknown"; - break; - } - - if (buf == NULL) - { - len=128; - buf=OPENSSL_malloc(len); - if (buf == NULL) return("OPENSSL_malloc Error"); - } - else if (len < 128) - return("Buffer too small"); - -#ifdef KSSL_DEBUG - BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp,alg); -#else - BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp); -#endif /* KSSL_DEBUG */ - return(buf); - } - -char *SSL_CIPHER_get_version(SSL_CIPHER *c) - { - int i; - - if (c == NULL) return("(NONE)"); - i=(int)(c->id>>24L); - if (i == 3) - return("TLSv1/SSLv3"); - else if (i == 2) - return("SSLv2"); - else - return("unknown"); - } - -/* return the actual cipher being used */ -const char *SSL_CIPHER_get_name(SSL_CIPHER *c) - { - if (c != NULL) - return(c->name); - return("(NONE)"); - } - -/* number of bits for symmetric cipher */ -int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits) - { - int ret=0; - - if (c != NULL) - { - if (alg_bits != NULL) *alg_bits = c->alg_bits; - ret = c->strength_bits; - } - return(ret); - } - -SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) - { - SSL_COMP *ctmp; - int i,nn; - - if ((n == 0) || (sk == NULL)) return(NULL); - nn=sk_SSL_COMP_num(sk); - for (i=0; i<nn; i++) - { - ctmp=sk_SSL_COMP_value(sk,i); - if (ctmp->id == n) - return(ctmp); - } - return(NULL); - } - -static int sk_comp_cmp(const SSL_COMP * const *a, - const SSL_COMP * const *b) - { - return((*a)->id-(*b)->id); - } - -STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) - { - return(ssl_comp_methods); - } - -int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) - { - SSL_COMP *comp; - STACK_OF(SSL_COMP) *sk; - - if (cm == NULL || cm->type == NID_undef) - return 1; - - MemCheck_off(); - comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); - comp->id=id; - comp->method=cm; - if (ssl_comp_methods == NULL) - sk=ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp); - else - sk=ssl_comp_methods; - if ((sk == NULL) || !sk_SSL_COMP_push(sk,comp)) - { - MemCheck_on(); - SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); - return(0); - } - else - { - MemCheck_on(); - return(1); - } - } |