Apply Lutz Behnke's 56 bit cipher patch with a few
minor changes.
Docs haven't been added at this stage. They are probably
best included in the 'ciphers' program docs.
diff --git a/ssl/ssl_ciph.c b/ssl/ssl_ciph.c
index 4c2989c..c86f41e 100644
--- a/ssl/ssl_ciph.c
+++ b/ssl/ssl_ciph.c
@@ -83,24 +83,11 @@
NULL,NULL,
};
-typedef struct cipher_sort_st
- {
- SSL_CIPHER *cipher;
- int pref;
- } CIPHER_SORT;
-
#define CIPHER_ADD 1
#define CIPHER_KILL 2
#define CIPHER_DEL 3
#define CIPHER_ORD 4
-
-typedef struct cipher_choice_st
- {
- int type;
- unsigned long algorithms;
- unsigned long mask;
- long top;
- } CIPHER_CHOICE;
+#define CIPHER_SPECIAL 5
typedef struct cipher_order_st
{
@@ -110,59 +97,55 @@
struct cipher_order_st *next,*prev;
} CIPHER_ORDER;
-static SSL_CIPHER cipher_aliases[]={
+static const SSL_CIPHER cipher_aliases[]={
/* Don't include eNULL unless specifically enabled */
- {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL, 0,SSL_ALL}, /* must be first */
- {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_DH, 0,SSL_DH, 0,SSL_MKEY_MASK},
- {0,SSL_TXT_EDH, 0,SSL_EDH, 0,SSL_MKEY_MASK|SSL_AUTH_MASK},
+ {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, /* must be first */
+ {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_aRSA,0,SSL_aRSA, 0,SSL_AUTH_MASK},
- {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,SSL_AUTH_MASK},
- {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,SSL_AUTH_MASK},
- {0,SSL_TXT_aNULL,0,SSL_aNULL,0,SSL_AUTH_MASK},
- {0,SSL_TXT_aDH, 0,SSL_aDH, 0,SSL_AUTH_MASK},
- {0,SSL_TXT_DSS, 0,SSL_DSS, 0,SSL_AUTH_MASK},
+ {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,SSL_ENC_MASK},
- {0,SSL_TXT_3DES,0,SSL_3DES, 0,SSL_ENC_MASK},
- {0,SSL_TXT_RC4, 0,SSL_RC4, 0,SSL_ENC_MASK},
- {0,SSL_TXT_RC2, 0,SSL_RC2, 0,SSL_ENC_MASK},
- {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,SSL_ENC_MASK},
- {0,SSL_TXT_eNULL,0,SSL_eNULL,0,SSL_ENC_MASK},
- {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,SSL_ENC_MASK},
+ {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_MD5, 0,SSL_MD5, 0,SSL_MAC_MASK},
- {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,SSL_MAC_MASK},
- {0,SSL_TXT_SHA, 0,SSL_SHA, 0,SSL_MAC_MASK},
+ {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,SSL_ENC_MASK},
- {0,SSL_TXT_RSA, 0,SSL_RSA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK},
- {0,SSL_TXT_ADH, 0,SSL_ADH, 0,SSL_AUTH_MASK|SSL_MKEY_MASK},
- {0,SSL_TXT_FZA, 0,SSL_FZA, 0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK},
+ {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_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_EXP40, 0,SSL_EXP40, 0,SSL_EXP_MASK},
- {0,SSL_TXT_EXPORT,0,SSL_EXP40, 0,SSL_EXP_MASK},
- {0,SSL_TXT_EXP56, 0,SSL_EXP56, 0,SSL_EXP_MASK},
- {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,SSL_SSL_MASK},
- {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,SSL_SSL_MASK},
- {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,SSL_SSL_MASK},
- {0,SSL_TXT_LOW, 0,SSL_LOW, 0,SSL_STRONG_MASK},
- {0,SSL_TXT_MEDIUM,0,SSL_MEDIUM,0,SSL_STRONG_MASK},
- {0,SSL_TXT_HIGH, 0,SSL_HIGH, 0,SSL_STRONG_MASK},
+ {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();
-
-static int cmp_by_name(SSL_CIPHER **a, SSL_CIPHER **b)
- {
- return(strcmp((*a)->name,(*b)->name));
- }
static void load_ciphers(void)
{
@@ -294,170 +277,328 @@
*tail=curr;
}
-STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_METHOD *ssl_method,
- STACK_OF(SSL_CIPHER) **cipher_list,
- STACK_OF(SSL_CIPHER) **cipher_list_by_id,
- char *str)
+static unsigned long ssl_cipher_get_disabled(void)
{
- SSL_CIPHER *c;
- char *l;
- STACK_OF(SSL_CIPHER) *ret=NULL,*ok=NULL;
-#define CL_BUF 40
- char buf[CL_BUF];
- char *tmp_str=NULL;
- unsigned long mask,algorithms,ma;
- char *start;
- int i,j,k,num=0,ch,multi;
- unsigned long al;
- STACK *ca_list=NULL;
- int current_x,num_x;
- CIPHER_CHOICE *ops=NULL;
- CIPHER_ORDER *list=NULL,*head=NULL,*tail=NULL,*curr,*tail2,*curr2;
- int list_num;
- int type;
- SSL_CIPHER c_tmp,*cp;
+ unsigned long mask;
- if (str == NULL) return(NULL);
-
- if (strncmp(str,"DEFAULT",7) == 0)
- {
- i=strlen(str)+2+strlen(SSL_DEFAULT_CIPHER_LIST);
- if ((tmp_str=Malloc(i)) == NULL)
- {
- SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- strcpy(tmp_str,SSL_DEFAULT_CIPHER_LIST);
- strcat(tmp_str,":");
- strcat(tmp_str,&(str[7]));
- str=tmp_str;
- }
- if (init_ciphers) load_ciphers();
-
- num=ssl_method->num_ciphers();
-
- if ((ret=sk_SSL_CIPHER_new(NULL)) == NULL) goto err;
- if ((ca_list=(STACK *)sk_new(cmp_by_name)) == NULL) goto err;
-
- mask =SSL_kFZA;
+ mask = SSL_kFZA;
#ifdef NO_RSA
- mask|=SSL_aRSA|SSL_kRSA;
+ mask |= SSL_aRSA|SSL_kRSA;
#endif
#ifdef NO_DSA
- mask|=SSL_aDSS;
+ mask |= SSL_aDSS;
#endif
#ifdef NO_DH
- mask|=SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
+ mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
#endif
#ifdef SSL_FORBID_ENULL
- mask|=SSL_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_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_digest_methods[SSL_MD_MD5_IDX ] == NULL)?SSL_MD5 :0;
- mask|=(ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL)?SSL_SHA1:0;
+ mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
+ mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
- if ((list=(CIPHER_ORDER *)Malloc(sizeof(CIPHER_ORDER)*num)) == NULL)
- goto err;
+ 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)
+ {
+ unsigned 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;
- for (i=0; i<num; i++)
+ list_num = 0; /* actual count of ciphers */
+ for (i = 0; i < num_of_ciphers; i++)
{
- c=ssl_method->get_cipher((unsigned int)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[list_num].cipher = c;
+ list[list_num].next = NULL;
+ list[list_num].prev = NULL;
+ list[list_num].active = 0;
list_num++;
+ /*
if (!sk_push(ca_list,(char *)c)) goto err;
+ */
}
}
-
- for (i=1; i<list_num-1; i++)
+
+ /*
+ * 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]);
+ list[i].prev = &(list[i-1]);
+ list[i].next = &(list[i+1]);
}
if (list_num > 0)
{
- head= &(list[0]);
- head->prev=NULL;
- head->next= &(list[1]);
- tail= &(list[list_num-1]);
- tail->prev= &(list[list_num-2]);
- tail->next=NULL;
+ (*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;
}
+ }
- /* special case */
- cipher_aliases[0].algorithms &= ~mask;
+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;
- /* get the aliases */
- k=sizeof(cipher_aliases)/sizeof(SSL_CIPHER);
- for (j=0; j<k; j++)
+ /*
+ * First, add the real ciphers as already collected
+ */
+ ciph_curr = head;
+ ca_curr = ca_list;
+ while (ciph_curr != NULL)
{
- al=cipher_aliases[j].algorithms;
- /* Drop those that are not relevent */
- if ((al & mask) == al) continue;
- if (!sk_push(ca_list,(char *)&(cipher_aliases[j]))) goto err;
+ *ca_curr = ciph_curr->cipher;
+ ca_curr++;
+ ciph_curr = ciph_curr->next;
}
- /* ca_list now holds a 'stack' of SSL_CIPHERS, some real, some
- * 'aliases' */
+ /*
+ * 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++;
+ }
+ }
- /* how many parameters are there? */
- num=1;
- for (l=str; *l; l++)
- if (ITEM_SEP(*l))
- num++;
- ops=(CIPHER_CHOICE *)Malloc(sizeof(CIPHER_CHOICE)*num);
- if (ops == NULL) goto err;
- memset(ops,0,sizeof(CIPHER_CHOICE)*num);
+ *ca_curr = NULL; /* end of list */
+ }
- /* we now parse the input string and create our operations */
- l=str;
- i=0;
- current_x=0;
+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 (;;)
{
- ch= *l;
+ if ((curr == NULL) || (curr == tail2)) break;
+ curr = curr2;
+ curr2 = curr->next;
- if (ch == '\0') break;
+ 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 = 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;
+ }
+#if 0
+ /*
+ * Go through the list of used strength_bits values in descending
+ * order, omit strength_bits "0".
+ */
+ for (i = max_strength_bits; i > 0; i--)
+ /* Do we really want this? If so "ALL:eNULL:@STRENGTH" puts eNULL
+ * ciphers first???
+ */
+
+#else
+ for (i = max_strength_bits; i >= 0; i--)
+#endif
+ if (number_uses[i] > 0)
+ ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
+ list, head_p, tail_p);
+
+ 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 == '-')
- { j=CIPHER_DEL; l++; }
+ { rule = CIPHER_DEL; l++; }
else if (ch == '+')
- { j=CIPHER_ORD; l++; }
+ { rule = CIPHER_ORD; l++; }
else if (ch == '!')
- { j=CIPHER_KILL; l++; }
- else
- { j=CIPHER_ADD; }
+ { rule = CIPHER_KILL; l++; }
+ else if (ch == '@')
+ { rule = CIPHER_SPECIAL; l++; }
+ else
+ { rule = CIPHER_ADD; }
if (ITEM_SEP(ch))
{
l++;
continue;
}
- ops[current_x].type=j;
- ops[current_x].algorithms=0;
- ops[current_x].mask=0;
+
+ algorithms = mask = algo_strength = mask_strength = 0;
start=l;
for (;;)
{
- ch= *l;
- i=0;
+ ch = *l;
+ buf = l;
+ buflen = 0;
#ifndef CHARSET_EBCDIC
while ( ((ch >= 'A') && (ch <= 'Z')) ||
((ch >= '0') && (ch <= '9')) ||
@@ -467,12 +608,28 @@
while ( isalnum(ch) || (ch == '-'))
#endif
{
- buf[i]=ch;
- ch= *(++l);
- i++;
- if (i >= (CL_BUF-2)) break;
+ ch = *(++l);
+ buflen++;
}
- buf[i]='\0';
+
+ if (buflen == 0)
+ {
+ /*
+ * We hit something, we cannot deal with,
+ * it is no command or seperator 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)
+ {
+ break; /* special treatment */
+ }
/* check for multi-part specification */
if (ch == '+')
@@ -483,133 +640,236 @@
else
multi=0;
- c_tmp.name=buf;
- j=sk_find(ca_list,(char *)&c_tmp);
- if (j < 0)
- goto end_loop;
+ /*
+ * Now search for the name in the ca_list. Be carefule
+ * 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 */
- cp=(SSL_CIPHER *)sk_value(ca_list,j);
- ops[current_x].algorithms|=cp->algorithms;
- /* We add the SSL_SSL_MASK so we can match the
- * SSLv2 and SSLv3 versions of RC4-MD5 */
- ops[current_x].mask|=cp->mask;
+ 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;
}
- current_x++;
- if (ch == '\0') break;
-end_loop:
- /* Make sure we scan until the next valid start point */
- while ((*l != '\0') && ITEM_SEP(*l))
- l++;
- }
- num_x=current_x;
- current_x=0;
-
- /* We will now process the list of ciphers, once for each category, to
- * decide what we should do with it. */
- for (j=0; j<num_x; j++)
- {
- algorithms=ops[j].algorithms;
- type=ops[j].type;
- mask=ops[j].mask;
-
- curr=head;
- curr2=head;
- tail2=tail;
- for (;;)
- {
- if ((curr == NULL) || (curr == tail2)) break;
- curr=curr2;
- curr2=curr->next;
-
- cp=curr->cipher;
- ma=mask & cp->algorithms;
- if ((ma == 0) || ((ma & algorithms) != ma))
- {
- /* does not apply */
- continue;
- }
-
- /* add the cipher if it has not been added yet. */
- if (type == CIPHER_ADD)
- {
- if (!curr->active)
- {
- ll_append_tail(&head,curr,&tail);
- curr->active=1;
- }
- }
- /* Move the added cipher to this location */
- else if (type == CIPHER_ORD)
- {
- if (curr->active)
- {
- ll_append_tail(&head,curr,&tail);
- }
- }
- else if (type == CIPHER_DEL)
- curr->active=0;
- if (type == CIPHER_KILL)
- {
- if (head == curr)
- head=curr->next;
+ /*
+ * Ok, we have the rule, now apply it
+ */
+ if (rule == CIPHER_SPECIAL)
+ { /* special command */
+ ok = 0;
+ if (!strncmp(buf, "STRENGTH", buflen))
+ ok = ssl_cipher_strength_sort(list,
+ head_p, tail_p);
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;
+ 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 through 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 */
}
- for (curr=head; curr != NULL; curr=curr->next)
+ 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) load_ciphers();
+
+ /*
+ * 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();
+ list = (CIPHER_ORDER *)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 togehter 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 **)Malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
+ if (ca_list == NULL)
+ {
+ 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);
+
+ Free(ca_list); /* Not needed anymore */
+
+ if (!ok)
+ { /* Rule processing failure */
+ 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)
+ {
+ 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(ret,curr->cipher);
+ sk_SSL_CIPHER_push(cipherstack, curr->cipher);
#ifdef CIPHER_DEBUG
printf("<%s>\n",curr->cipher->name);
#endif
}
}
+ 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=ret;
+ *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(ret);
+ *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
}
+ /*
+ * Now it is getting really strange. If something failed during
+ * the previous pointer assignement 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))
- goto err;
+ {
+ sk_SSL_CIPHER_free(cipherstack);
+ return(NULL);
+ }
+
sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
- ok=ret;
- ret=NULL;
-err:
- if (tmp_str) Free(tmp_str);
- if (ops != NULL) Free(ops);
- if (ret != NULL) sk_SSL_CIPHER_free(ret);
- if (ca_list != NULL) sk_free(ca_list);
- if (list != NULL) Free(list);
- return(ok);
+ return(cipherstack);
}
char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
@@ -617,15 +877,16 @@
int is_export,pkl,kl;
char *ver,*exp;
char *kx,*au,*enc,*mac;
- unsigned long alg,alg2;
+ unsigned long alg,alg2,alg_s;
static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
alg=cipher->algorithms;
+ alg_s=cipher->algo_strength;
alg2=cipher->algorithm2;
- is_export=SSL_IS_EXPORT(alg);
- pkl=SSL_EXPORT_PKEYLENGTH(alg);
- kl=SSL_EXPORT_KEYLENGTH(alg);
+ 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)
@@ -755,34 +1016,13 @@
/* number of bits for symetric cipher */
int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
{
- int ret=0,a=0;
- const EVP_CIPHER *enc;
- const EVP_MD *md;
- SSL_SESSION ss;
+ int ret=0;
if (c != NULL)
{
- ss.cipher=c;
- if (!ssl_cipher_get_evp(&ss,&enc,&md,NULL))
- return(0);
-
- a=EVP_CIPHER_key_length(enc)*8;
-
- if (SSL_C_IS_EXPORT(c))
- {
- ret=SSL_C_EXPORT_KEYLENGTH(c)*8;
- }
- else
- {
- if (c->algorithm2 & SSL2_CF_8_BYTE_ENC)
- ret=64;
- else
- ret=a;
- }
+ if (alg_bits != NULL) *alg_bits = c->alg_bits;
+ ret = c->strength_bits;
}
-
- if (alg_bits != NULL) *alg_bits=a;
-
return(ret);
}
