X509_NAME_cmp() now compares PrintableString and emailAddress with a value of type
[openssl.git] / crypto / x509 / x509_cmp.c
index 415e5f3..474f6de 100644 (file)
@@ -159,6 +159,99 @@ int X509_cmp(const X509 *a, const X509 *b)
 }
 #endif
 
+
+/* Case insensitive string comparision */
+static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
+{
+       int i;
+
+       if (a->length != b->length)
+               return (a->length - b->length);
+
+       for (i=0; i<a->length; i++)
+       {
+               int ca, cb;
+
+               ca = tolower(a->data[i]);
+               cb = tolower(b->data[i]);
+
+               if (ca != cb)
+                       return(ca-cb);
+       }
+       return 0;
+}
+
+/* Case insensitive string comparision with space normalization 
+ * Space normalization - ignore leading, trailing spaces, 
+ *       multiple spaces between characters are replaced by single space  
+ */
+static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
+{
+       unsigned char *pa = NULL, *pb = NULL;
+       int la, lb;
+       
+       la = a->length;
+       lb = b->length;
+       pa = a->data;
+       pb = b->data;
+
+       /* skip leading spaces */
+       while (la > 0 && isspace(*pa))
+       {
+               la--;
+               pa++;
+       }
+       while (lb > 0 && isspace(*pb))
+       {
+               lb--;
+               pb++;
+       }
+
+       /* skip trailing spaces */
+       while (la > 0 && isspace(pa[la-1]))
+               la--;
+       while (lb > 0 && isspace(pb[lb-1]))
+               lb--;
+
+       /* compare strings with space normalization */
+       while (la > 0 && lb > 0)
+       {
+               int ca, cb;
+
+               /* compare character */
+               ca = tolower(*pa);
+               cb = tolower(*pb);
+               if (ca != cb)
+                       return (ca - cb);
+
+               pa++; pb++;
+               la--; lb--;
+
+               if (la <= 0 || lb <= 0)
+                       break;
+
+               /* is white space next character ? */
+               if (isspace(*pa) && isspace(*pb))
+               {
+                       /* skip remaining white spaces */
+                       while (la > 0 && isspace(*pa))
+                       {
+                               la--;
+                               pa++;
+                       }
+                       while (lb > 0 && isspace(*pb))
+                       {
+                               lb--;
+                               pb++;
+                       }
+               }
+       }
+       if (la > 0 || lb > 0)
+               return la - lb;
+
+       return 0;
+}
+
 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
        {
        int i,j;
@@ -172,10 +265,20 @@ int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
                {
                na=sk_X509_NAME_ENTRY_value(a->entries,i);
                nb=sk_X509_NAME_ENTRY_value(b->entries,i);
-               j=na->value->length-nb->value->length;
+               j=na->value->type-nb->value->type;
                if (j) return(j);
-               j=memcmp(na->value->data,nb->value->data,
-                       na->value->length);
+               if (na->value->type == V_ASN1_PRINTABLESTRING)
+                       j=nocase_spacenorm_cmp(na->value, nb->value);
+               else if (na->value->type == V_ASN1_IA5STRING
+                       && OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress)
+                       j=nocase_cmp(na->value, nb->value);
+               else
+                       {
+                       j=na->value->length-nb->value->length;
+                       if (j) return(j);
+                       j=memcmp(na->value->data,nb->value->data,
+                               na->value->length);
+                       }
                if (j) return(j);
                j=na->set-nb->set;
                if (j) return(j);