1 /* |
1 /* |
2 * Copyright (c) 1997, 2017, 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 output-feedback (OFB) mode. |
33 * This class represents ciphers in output-feedback (OFB) 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. |
146 * a multiple of the <code>numBytes</code> |
147 * a multiple of the <code>numBytes</code> |
147 * @return the length of the encrypted data |
148 * @return the length of the encrypted data |
148 */ |
149 */ |
149 int encrypt(byte[] plain, int plainOffset, int plainLen, |
150 int encrypt(byte[] plain, int plainOffset, int plainLen, |
150 byte[] cipher, int cipherOffset) { |
151 byte[] cipher, int cipherOffset) { |
151 |
152 ArrayUtil.blockSizeCheck(plainLen, numBytes); |
152 if ((plainLen % numBytes) != 0) { |
153 ArrayUtil.nullAndBoundsCheck(plain, plainOffset, plainLen); |
153 throw new ProviderException("Internal error in input buffering"); |
154 ArrayUtil.nullAndBoundsCheck(cipher, cipherOffset, plainLen); |
154 } |
155 |
155 int nShift = blockSize - numBytes; |
156 int nShift = blockSize - numBytes; |
156 int loopCount = plainLen / numBytes; |
157 int loopCount = plainLen / numBytes; |
157 |
158 |
158 for (; loopCount > 0; |
159 for (; loopCount > 0; |
159 plainOffset += numBytes, cipherOffset += numBytes, |
160 plainOffset += numBytes, cipherOffset += numBytes, |
187 * @param cipherOffset the offset in <code>cipher</code> |
188 * @param cipherOffset the offset in <code>cipher</code> |
188 * @return the length of the encrypted data |
189 * @return the length of the encrypted data |
189 */ |
190 */ |
190 int encryptFinal(byte[] plain, int plainOffset, int plainLen, |
191 int encryptFinal(byte[] plain, int plainOffset, int plainLen, |
191 byte[] cipher, int cipherOffset) { |
192 byte[] cipher, int cipherOffset) { |
|
193 ArrayUtil.nullAndBoundsCheck(plain, plainOffset, plainLen); |
|
194 ArrayUtil.nullAndBoundsCheck(cipher, cipherOffset, plainLen); |
|
195 |
192 int oddBytes = plainLen % numBytes; |
196 int oddBytes = plainLen % numBytes; |
193 int len = encrypt(plain, plainOffset, (plainLen - oddBytes), |
197 int len = encrypt(plain, plainOffset, (plainLen - oddBytes), |
194 cipher, cipherOffset); |
198 cipher, cipherOffset); |
195 plainOffset += len; |
199 plainOffset += len; |
196 cipherOffset += len; |
200 cipherOffset += len; |