func (cr *cipherBlockReader) Read(p []byte) (n int, err error) {
	for {
		if cr.n < len(cr.outbuf) {
			// return buffered output
			n = copy(p, cr.outbuf[cr.n:])
			cr.n += n
			return n, nil
		}
		if cr.err != nil {
			err = cr.err
			cr.err = nil
			return 0, err
		}
		if len(p) >= cap(cr.outbuf) {
			break
		}
		// p is not large enough to process a block, use outbuf instead
		n, cr.err = cr.read(cr.outbuf[:cap(cr.outbuf)])
		cr.outbuf = cr.outbuf[:n]
		cr.n = 0
	}
	// read blocks into p
	return cr.read(p)
}
func (cr *cipherBlockReader) Read(p []byte) (n int, err error) {
	for {
		if cr.n < len(cr.outbuf) {
			
			n = copy(p, cr.outbuf[cr.n:])
			cr.n += n
			return n, nil
		}
		if cr.err != nil {
			err = cr.err
			cr.err = nil
			return 0, err
		}
		if len(p) >= cap(cr.outbuf) {
			break
		}
		
		n, cr.err = cr.read(cr.outbuf[:cap(cr.outbuf)])
		cr.outbuf = cr.outbuf[:n]
		cr.n = 0
	}
	
	return cr.read(p)
}
func ( cr * cipherBlockReader ) Read ( p [ ] byte ) ( n int , err error ) { for { if cr . n < len ( cr . outbuf ) { // return buffered output n = copy ( p , cr . outbuf [ cr . n : ] ) cr . n += n return n , nil } if cr . err != nil { err = cr . err cr . err = nil return 0 , err } if len ( p ) >= cap ( cr . outbuf ) { break } // p is not large enough to process a block, use outbuf instead n , cr . err = cr . read ( cr . outbuf [ : cap ( cr . outbuf ) ] ) cr . outbuf = cr . outbuf [ : n ] cr . n = 0 } // read blocks into p return cr . read ( p ) }
// Read reads and decrypts data into p.
// If the input is not a multiple of the cipher block size,
// the trailing bytes will be ignored.
Read reads and decrypts data into p . If the input is not a multiple of the cipher block size the trailing bytes will be ignored .