Returns true if the string is null or 0-length. @param str the string to be examined @return true if str is null or zero length

Base64-encode the given data and return a newly allocated byte[] with the result. @param str the string to encode @param flags controls certain fea

Encrypt the data by the special key. @param data The original data. @param key Encrypt key. @return The encrypted data.

Generate a security key. @param text The content text will be encrypted. @return A security key for the encryption.

Whether the string should be encrypted. @param data The original data. @return If you want to skip this String, return false.

Decrypt the data to origin by the special key. @param data The encrypted data. @param key Encrypt key. @return The original data.

Returns true if the string is null or 0-length after trims. @param str the string to be examined @return true if str is null or zero length

Decode another block of input data. @return true if the state machine is still healthy. false if bad base-64 data has been detected in the i

Decode the Base64-encoded data in input and return the data in a new byte array. <p>The padding '=' characters at the end are considered optional, bu

get md5 string for input buffer @param buffer data to be calculated @return md5 result in string format

@return the maximum number of bytes a call to process() could produce for the given number of input bytes. This may be an overestimate.

@return an overestimate for the number of bytes {@code len} bytes could decode to.

@return an overestimate for the number of bytes {@code len} bytes could encode to.

Encode/decode another block of input data. this.output is provided by the caller, and must be big enough to hold all the coded data. On exit, this.o