Method streamtowords

ext/jruby/bcrypt_jruby/BCrypt.java:519–535

Cycically extract a word of key material @param data the string to extract the data from @param offp a "pointer" (as a one-entry array) to the current offset into data @param signp a "pointer" (as a one-entry array) to the cumulative flag for non-benign sign extension @return correct and buggy next

(byte data[], int offp[], int signp[])

	 * @return	correct and buggy next word of material from data as int[2]
	 */
	private static int[] streamtowords(byte data[], int offp[], int signp[]) {
		int i;
		int words[] = { 0, 0 };
		int off = offp[0];
		int sign = signp[0];

		for (i = 0; i < 4; i++) {
			words[0] = (words[0] << 8) | (data[off] & 0xff);
			words[1] = (words[1] << 8) | (int) data[off]; // sign extension bug
			if (i > 0) sign |= words[1] & 0x80;
			off = (off + 1) % data.length;
		}

		offp[0] = off;
		signp[0] = sign;
		return words;
	}

	/**
	 * Cycically extract a word of key material