![]() ![]() The following is a small collection of sample programs to demonstrate using the Base64URLEncoder. If insertLineBreaks is false, then the class discards maxLineLength and sets it to 0. MaxLineLength is the length of a line if insertLineBreaks is true. InsertLineBreaks determines if the encoder should add line breaks. If attachment is NULL, then the Base64URLEncoder object will internally accumulate the output byte stream. 2.1 Encoding a Binary String (Non-Filter)Ĭonstruction Base64URLEncoder(BufferedTransformation *attachment = NULL,Īttachment is a BufferedTransformation, such as another filter or sink.If using a downlevel version of the library, then you must download and apply the patch below. Note well: this class was added to Crypto++ at version 5.6.3 ( SVN, GitHub). If you choose the wrong encoder, like a Base64Encoder instead of a Base64URLEncoder, then the mischosen decoder will silently skip unrecognized characters. Note well: decoders skip characters that are not in the particular alphabet. Because a pointer is taken, the Base64URLEncoder owns the attached transformation, and therefore will destroy it. The Base64URLEncoder takes a pointer to a BufferedTransformation. Third, you can create a new encoder based on an existing one, like Base32Encoder. Second, you can swap-in a different alphabet as detailed in Changing Alphabets. First, you can visit the Category:Encoder page and see if the encoder already exists. If you need a different alphabet then you have three choices. The decoder ignores characters not in the alphabet. The Base64URLEncoder and Base64URLDecoder alphabet is ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_. The partner decoder is a Base64URLDecoder. ![]() The class is also helpful for web technologies, like JSON Web Encryption (JWE) and and JSON Web Keys (JWK). The alphabet is specified in RFC 4648, The Base16, Base32, and Base64 Data Encodings. The Base64URLEncoder encodes bytes into URL or filename safe character strings. ![]()
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