Allow surrounding whitespace in uuid

* src/util/uuid.c: extend virUUIDParse to allow leading and trailing
  spaces in UUIDs

src/util/uuid.c

@@ -146,9 +146,13 @@ virUUIDParse(const char *uuidstr, unsigned char *uuid) {
 
     /*
      * do a liberal scan allowing '-' and ' ' anywhere between character
-     * pairs as long as there is 32 of them in the end.
+     * pairs, and surrounding whitespace, as long as there are exactly
+     * 32 hexadecimal digits the end.
      */
     cur = uuidstr;
+    while (c_isspace(*cur))
+        cur++;
+
     for (i = 0;i < VIR_UUID_BUFLEN;) {
         uuid[i] = 0;
         if (*cur == 0)
@@ -171,6 +175,12 @@ virUUIDParse(const char *uuidstr, unsigned char *uuid) {
         cur++;
     }
 
+    while (*cur) {
+        if (!c_isspace(*cur))
+            goto error;
+        cur++;
+    }
+
     return 0;
 
  error: