Fix for crashing INTEGERs, ENUMERATEDs and OBJECT IDENTIFIERs.
[openssl.git] / crypto / asn1 / a_int.c
index 7ed99eb..bcbdc7d 100644 (file)
@@ -202,7 +202,12 @@ ASN1_INTEGER *d2i_ASN1_INTEGER(ASN1_INTEGER **a, unsigned char **pp,
                goto err;
                }
        to=s;
-       if (*p & 0x80) /* a negative number */
+       if(!len) {
+               /* Strictly speaking this is an illegal INTEGER but we
+                * tolerate it.
+                */
+               ret->type=V_ASN1_INTEGER;
+       } else if (*p & 0x80) /* a negative number */
                {
                ret->type=V_ASN1_NEG_INTEGER;
                if ((*p == 0xff) && (len != 1)) {
@@ -301,7 +306,8 @@ ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, unsigned char **pp,
                goto err;
                }
        to=s;
-               ret->type=V_ASN1_INTEGER;
+       ret->type=V_ASN1_INTEGER;
+       if(len) {
                if ((*p == 0) && (len != 1))
                        {
                        p++;
@@ -309,6 +315,7 @@ ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, unsigned char **pp,
                        }
                memcpy(s,p,(int)len);
                p+=len;
+       }
 
        if (ret->data != NULL) Free((char *)ret->data);
        ret->data=s;