diff options
Diffstat (limited to 'mobile/android/services/src/main/java/org/mozilla/gecko/browserid/ASNUtils.java')
-rw-r--r-- | mobile/android/services/src/main/java/org/mozilla/gecko/browserid/ASNUtils.java | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/mobile/android/services/src/main/java/org/mozilla/gecko/browserid/ASNUtils.java b/mobile/android/services/src/main/java/org/mozilla/gecko/browserid/ASNUtils.java deleted file mode 100644 index b032067c5..000000000 --- a/mobile/android/services/src/main/java/org/mozilla/gecko/browserid/ASNUtils.java +++ /dev/null @@ -1,82 +0,0 @@ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -package org.mozilla.gecko.browserid; - - -/** - * Java produces signature in ASN.1 format. Here's some hard-coded encoding and decoding - * code, courtesy of a comment in - * <a href="http://stackoverflow.com/questions/10921733/how-sign-method-of-the-digital-signature-combines-the-r-s-values-in-to-array">http://stackoverflow.com/questions/10921733/how-sign-method-of-the-digital-signature-combines-the-r-s-values-in-to-array</a>. - */ -public class ASNUtils { - /** - * Decode two short arrays from ASN.1 bytes. - * @param input to extract. - * @return length 2 array of byte arrays. - */ - public static byte[][] decodeTwoArraysFromASN1(byte[] input) throws IllegalArgumentException { - if (input == null) { - throw new IllegalArgumentException("input must not be null"); - } - if (input.length <= 3) - throw new IllegalArgumentException("bad length"); - if (input[0] != 0x30) - throw new IllegalArgumentException("bad encoding"); - if ((input[1] & ((byte) 0x80)) != 0) - throw new IllegalArgumentException("bad length encoding"); - if (input[2] != 0x02) - throw new IllegalArgumentException("bad encoding"); - if ((input[3] & ((byte) 0x80)) != 0) - throw new IllegalArgumentException("bad length encoding"); - byte rLength = input[3]; - if (input.length <= 5 + rLength) - throw new IllegalArgumentException("bad length"); - if (input[4 + rLength] != 0x02) - throw new IllegalArgumentException("bad encoding"); - if ((input[5 + rLength] & (byte) 0x80) !=0) - throw new IllegalArgumentException("bad length encoding"); - byte sLength = input[5 + rLength]; - if (input.length != 6 + sLength + rLength) - throw new IllegalArgumentException("bad length"); - byte[] rArr = new byte[rLength]; - byte[] sArr = new byte[sLength]; - System.arraycopy(input, 4, rArr, 0, rLength); - System.arraycopy(input, 6 + rLength, sArr, 0, sLength); - return new byte[][] { rArr, sArr }; - } - - /** - * Encode two short arrays into ASN.1 bytes. - * @param first array to encode. - * @param second array to encode. - * @return array. - */ - public static byte[] encodeTwoArraysToASN1(byte[] first, byte[] second) throws IllegalArgumentException { - if (first == null) { - throw new IllegalArgumentException("first must not be null"); - } - if (second == null) { - throw new IllegalArgumentException("second must not be null"); - } - byte[] output = new byte[6 + first.length + second.length]; - output[0] = 0x30; - if (4 + first.length + second.length > 255) - throw new IllegalArgumentException("bad length"); - output[1] = (byte) (4 + first.length + second.length); - if ((output[1] & ((byte) 0x80)) != 0) - throw new IllegalArgumentException("bad length encoding"); - output[2] = 0x02; - output[3] = (byte) first.length; - if ((output[3] & ((byte) 0x80)) != 0) - throw new IllegalArgumentException("bad length encoding"); - System.arraycopy(first, 0, output, 4, first.length); - output[4 + first.length] = 0x02; - output[5 + first.length] = (byte) second.length; - if ((output[5 + first.length] & ((byte) 0x80)) != 0) - throw new IllegalArgumentException("bad length encoding"); - System.arraycopy(second, 0, output, 6 + first.length, second.length); - return output; - } -} |