in pdfbox/src/main/java/org/apache/pdfbox/pdmodel/encryption/SaslPrep.java [242:263]
private static boolean nonCharacterCodePoint(int codepoint)
{
return 0xFDD0 <= codepoint && codepoint <= 0xFDEF
|| 0xFFFE <= codepoint && codepoint <= 0xFFFF
|| 0x1FFFE <= codepoint && codepoint <= 0x1FFFF
|| 0x2FFFE <= codepoint && codepoint <= 0x2FFFF
|| 0x3FFFE <= codepoint && codepoint <= 0x3FFFF
|| 0x4FFFE <= codepoint && codepoint <= 0x4FFFF
|| 0x5FFFE <= codepoint && codepoint <= 0x5FFFF
|| 0x6FFFE <= codepoint && codepoint <= 0x6FFFF
|| 0x7FFFE <= codepoint && codepoint <= 0x7FFFF
|| 0x8FFFE <= codepoint && codepoint <= 0x8FFFF
|| 0x9FFFE <= codepoint && codepoint <= 0x9FFFF
|| 0xAFFFE <= codepoint && codepoint <= 0xAFFFF
|| 0xBFFFE <= codepoint && codepoint <= 0xBFFFF
|| 0xCFFFE <= codepoint && codepoint <= 0xCFFFF
|| 0xDFFFE <= codepoint && codepoint <= 0xDFFFF
|| 0xEFFFE <= codepoint && codepoint <= 0xEFFFF
|| 0xFFFFE <= codepoint && codepoint <= 0xFFFFF
|| 0x10FFFE <= codepoint && codepoint <= 0x10FFFF
;
}