equal
deleted
inserted
replaced
1 /* |
1 /* |
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. Oracle designates this |
7 * published by the Free Software Foundation. Oracle designates this |
25 |
25 |
26 package com.sun.crypto.provider; |
26 package com.sun.crypto.provider; |
27 |
27 |
28 import java.security.InvalidKeyException; |
28 import java.security.InvalidKeyException; |
29 import java.security.ProviderException; |
29 import java.security.ProviderException; |
|
30 import sun.security.util.ArrayUtil; |
30 |
31 |
31 /** |
32 /** |
32 * This class represents ciphers in cipher-feedback (CFB) mode. |
33 * This class represents ciphers in cipher-feedback (CFB) mode. |
33 * |
34 * |
34 * <p>This mode is implemented independently of a particular cipher. |
35 * <p>This mode is implemented independently of a particular cipher. |
147 * a multiple of the <code>numBytes</code> |
148 * a multiple of the <code>numBytes</code> |
148 * @return the length of the encrypted data |
149 * @return the length of the encrypted data |
149 */ |
150 */ |
150 int encrypt(byte[] plain, int plainOffset, int plainLen, |
151 int encrypt(byte[] plain, int plainOffset, int plainLen, |
151 byte[] cipher, int cipherOffset) { |
152 byte[] cipher, int cipherOffset) { |
152 if ((plainLen % numBytes) != 0) { |
153 ArrayUtil.blockSizeCheck(plainLen, numBytes); |
153 throw new ProviderException("Internal error in input buffering"); |
154 ArrayUtil.nullAndBoundsCheck(plain, plainOffset, plainLen); |
154 } |
155 ArrayUtil.nullAndBoundsCheck(cipher, cipherOffset, plainLen); |
155 |
156 |
156 int nShift = blockSize - numBytes; |
157 int nShift = blockSize - numBytes; |
157 int loopCount = plainLen / numBytes; |
158 int loopCount = plainLen / numBytes; |
158 |
159 |
159 for (; loopCount > 0 ; |
160 for (; loopCount > 0 ; |
223 * a multiple of the <code>numBytes</code> |
224 * a multiple of the <code>numBytes</code> |
224 * @return the length of the decrypted data |
225 * @return the length of the decrypted data |
225 */ |
226 */ |
226 int decrypt(byte[] cipher, int cipherOffset, int cipherLen, |
227 int decrypt(byte[] cipher, int cipherOffset, int cipherLen, |
227 byte[] plain, int plainOffset) { |
228 byte[] plain, int plainOffset) { |
228 if ((cipherLen % numBytes) != 0) { |
229 |
229 throw new ProviderException("Internal error in input buffering"); |
230 ArrayUtil.blockSizeCheck(cipherLen, numBytes); |
230 } |
231 ArrayUtil.nullAndBoundsCheck(cipher, cipherOffset, cipherLen); |
|
232 ArrayUtil.nullAndBoundsCheck(plain, plainOffset, cipherLen); |
231 |
233 |
232 int nShift = blockSize - numBytes; |
234 int nShift = blockSize - numBytes; |
233 int loopCount = cipherLen / numBytes; |
235 int loopCount = cipherLen / numBytes; |
234 |
236 |
235 for (; loopCount > 0; |
237 for (; loopCount > 0; |