Remove references to o_time.h
[openssl.git] / crypto / asn1 / tasn_dec.c
index 61632a9..87d7dfd 100644 (file)
@@ -1,5 +1,5 @@
 /* tasn_dec.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2000.
  */
 /* ====================================================================
@@ -69,7 +69,7 @@ static int asn1_check_eoc(const unsigned char **in, long len);
 static int asn1_find_end(const unsigned char **in, long len, char inf);
 
 static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
-                               char inf, int tag, int aclass);
+                       char inf, int tag, int aclass, int depth);
 
 static int collect_data(BUF_MEM *buf, const unsigned char **p, long plen);
 
@@ -93,7 +93,7 @@ static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
                                int tag, int aclass, char opt, ASN1_TLC *ctx);
 
 /* Table to convert tags to bit values, used for MSTRING type */
-static unsigned long tag2bit[32] = {
+static const unsigned long tag2bit[32] = {
 0,     0,      0,      B_ASN1_BIT_STRING,      /* tags  0 -  3 */
 B_ASN1_OCTET_STRING,   0,      0,              B_ASN1_UNKNOWN,/* tags  4- 7 */
 B_ASN1_UNKNOWN,        B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags  8-11 */
@@ -168,7 +168,7 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
        int i;
        int otag;
        int ret = 0;
-       ASN1_VALUE *pchval, **pchptr, *ptmpval;
+       ASN1_VALUE **pchptr, *ptmpval;
        if (!pval)
                return 0;
        if (aux && aux->asn1_cb)
@@ -319,7 +319,6 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
                        goto err;
                        }
                /* CHOICE type, try each possibility in turn */
-               pchval = NULL;
                p = *in;
                for (i = 0, tt=it->templates; i < it->tcount; i++, tt++)
                        {
@@ -613,7 +612,6 @@ static int asn1_template_ex_d2i(ASN1_VALUE **val,
 
        err:
        ASN1_template_free(val, tt);
-       *val = NULL;
        return 0;
        }
 
@@ -668,11 +666,12 @@ static int asn1_template_noexp_d2i(ASN1_VALUE **val,
                else
                        {
                        /* We've got a valid STACK: free up any items present */
-                       STACK *sktmp = (STACK *)*val;
+                       STACK_OF(ASN1_VALUE) *sktmp
+                           = (STACK_OF(ASN1_VALUE) *)*val;
                        ASN1_VALUE *vtmp;
-                       while(sk_num(sktmp) > 0)
+                       while(sk_ASN1_VALUE_num(sktmp) > 0)
                                {
-                               vtmp = (ASN1_VALUE *)sk_pop(sktmp);
+                               vtmp = sk_ASN1_VALUE_pop(sktmp);
                                ASN1_item_ex_free(&vtmp,
                                                ASN1_ITEM_ptr(tt->item));
                                }
@@ -713,7 +712,8 @@ static int asn1_template_noexp_d2i(ASN1_VALUE **val,
                                goto err;
                                }
                        len -= p - q;
-                       if (!sk_push((STACK *)*val, (char *)skfield))
+                       if (!sk_ASN1_VALUE_push((STACK_OF(ASN1_VALUE) *)*val,
+                                               skfield))
                                {
                                ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I,
                                                ERR_R_MALLOC_FAILURE);
@@ -760,7 +760,6 @@ static int asn1_template_noexp_d2i(ASN1_VALUE **val,
 
        err:
        ASN1_template_free(val, tt);
-       *val = NULL;
        return 0;
        }
 
@@ -880,7 +879,7 @@ static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
                 * internally irrespective of the type. So instead just check
                 * for UNIVERSAL class and ignore the tag.
                 */
-               if (!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL))
+               if (!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL, 0))
                        {
                        free_cont = 1;
                        goto err;
@@ -1014,6 +1013,18 @@ int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
                case V_ASN1_SET:
                case V_ASN1_SEQUENCE:
                default:
+               if (utype == V_ASN1_BMPSTRING && (len & 1))
+                       {
+                       ASN1err(ASN1_F_ASN1_EX_C2I,
+                                       ASN1_R_BMPSTRING_IS_WRONG_LENGTH);
+                       goto err;
+                       }
+               if (utype == V_ASN1_UNIVERSALSTRING && (len & 3))
+                       {
+                       ASN1err(ASN1_F_ASN1_EX_C2I,
+                                       ASN1_R_UNIVERSALSTRING_IS_WRONG_LENGTH);
+                       goto err;
+                       }
                /* All based on ASN1_STRING and handled the same */
                if (!*pval)
                        {
@@ -1130,8 +1141,18 @@ static int asn1_find_end(const unsigned char **in, long len, char inf)
  * if it is indefinite length.
  */
 
+#ifndef ASN1_MAX_STRING_NEST
+/* This determines how many levels of recursion are permitted in ASN1
+ * string types. If it is not limited stack overflows can occur. If set
+ * to zero no recursion is allowed at all. Although zero should be adequate
+ * examples exist that require a value of 1. So 5 should be more than enough.
+ */
+#define ASN1_MAX_STRING_NEST 5
+#endif
+
+
 static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
-                               char inf, int tag, int aclass)
+                       char inf, int tag, int aclass, int depth)
        {
        const unsigned char *p, *q;
        long plen;
@@ -1173,13 +1194,15 @@ static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
                /* If indefinite length constructed update max length */
                if (cst)
                        {
-#ifdef OPENSSL_ALLOW_NESTED_ASN1_STRINGS
-                       if (!asn1_collect(buf, &p, plen, ininf, tag, aclass))
+                       if (depth >= ASN1_MAX_STRING_NEST)
+                               {
+                               ASN1err(ASN1_F_ASN1_COLLECT,
+                                       ASN1_R_NESTED_ASN1_STRING);
+                               return 0;
+                               }
+                       if (!asn1_collect(buf, &p, plen, ininf, tag, aclass,
+                                               depth + 1))
                                return 0;
-#else
-                       ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_NESTED_ASN1_STRING);
-                       return 0;
-#endif
                        }
                else if (plen && !collect_data(buf, &p, plen))
                        return 0;