Playfair cipher: Difference between revisions

return codecc(new StringBuilder(out), 4);

private static String codecc(StringBuilder txtstring, int dirdirection) {

int len = txtstring.length();

int r1rowOne = positions[a - 'A'].y;

int r2rowTwo = positions[b - 'A'].y;

int c1columnOne = positions[a - 'A'].x;

int c2columnTwo = positions[b - 'A'].x;

if (r1rowOne == r2rowTwo) {

c1columnOne = (c1columnOne + dirdirection) % 5;

c2columnTwo = (c2columnTwo + dirdirection) % 5;

} else if (c1columnOne == c2) {

r1rowOne = (r1rowOne + dirdirection) % 5;

r2rowTwo = (r2rowTwo + dirdirection) % 5;

int tmp = c1columnOne;

c1columnOne = c2columnTwo;

c2columnTwo = tmp;

txtstring.setCharAt(i, charTable[r1rowOne][c1columnOne]);

txtstring.setCharAt(i + 1, charTable[r2rowTwo][c2columnTwo]);

return txtstring.toString();