--- a/libtomcrypt/src/pk/asn1/der/utf8/der_encode_utf8_string.c	Tue Jan 23 23:27:40 2018 +0800
+++ b/libtomcrypt/src/pk/asn1/der/utf8/der_encode_utf8_string.c	Sat Feb 17 19:29:51 2018 +0800
@@ -5,8 +5,6 @@
  *
  * The library is free for all purposes without any express
  * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
  */
 #include "tomcrypt.h"
 
@@ -37,9 +35,7 @@
 
    /* get the size */
    for (x = len = 0; x < inlen; x++) {
-       if (in[x] < 0 || in[x] > 0x1FFFF) { 
-          return CRYPT_INVALID_ARG;
-       }
+       if (!der_utf8_valid_char(in[x])) return CRYPT_INVALID_ARG;
        len += der_utf8_charsize(in[x]);
    }
 
@@ -57,7 +53,7 @@
 
    /* too big? */
    if (y > *outlen) {
-      *outlen = len;
+      *outlen = y;
       return CRYPT_BUFFER_OVERFLOW;
    }
 
@@ -79,6 +75,7 @@
       out[x++] = (unsigned char)((len>>8)&255);
       out[x++] = (unsigned char)(len&255);
    } else {
+       /* coverity[dead_error_line] */
       return CRYPT_INVALID_ARG;
    }
 
@@ -88,7 +85,9 @@
           case 1: out[x++] = (unsigned char)in[y]; break;
           case 2: out[x++] = 0xC0 | ((in[y] >> 6) & 0x1F);  out[x++] = 0x80 | (in[y] & 0x3F); break;
           case 3: out[x++] = 0xE0 | ((in[y] >> 12) & 0x0F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break;
+#if !defined(LTC_WCHAR_MAX) || LTC_WCHAR_MAX > 0xFFFF
           case 4: out[x++] = 0xF0 | ((in[y] >> 18) & 0x07); out[x++] = 0x80 | ((in[y] >> 12) & 0x3F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break;
+#endif
        }
    }
 
@@ -100,6 +99,6 @@
 
 #endif
 
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */