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Diffstat (limited to 'mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/Base64.java')
| -rw-r--r-- | mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/Base64.java | 756 |
1 files changed, 0 insertions, 756 deletions
diff --git a/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/Base64.java b/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/Base64.java deleted file mode 100644 index 07ed1a4c4..000000000 --- a/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/Base64.java +++ /dev/null @@ -1,756 +0,0 @@ -// Mozilla has modified this file - see http://hg.mozilla.org/ for details. -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package org.mozilla.apache.commons.codec.binary; - -import java.math.BigInteger; - -/** - * Provides Base64 encoding and decoding as defined by <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a>. - * - * <p> - * This class implements section <cite>6.8. Base64 Content-Transfer-Encoding</cite> from RFC 2045 <cite>Multipurpose - * Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies</cite> by Freed and Borenstein. - * </p> - * <p> - * The class can be parameterized in the following manner with various constructors: - * <ul> - * <li>URL-safe mode: Default off.</li> - * <li>Line length: Default 76. Line length that aren't multiples of 4 will still essentially end up being multiples of - * 4 in the encoded data. - * <li>Line separator: Default is CRLF ("\r\n")</li> - * </ul> - * </p> - * <p> - * Since this class operates directly on byte streams, and not character streams, it is hard-coded to only encode/decode - * character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252, UTF-8, etc). - * </p> - * <p> - * This class is not thread-safe. Each thread should use its own instance. - * </p> - * - * @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a> - * @author Apache Software Foundation - * @since 1.0 - * @version $Revision: 1080712 $ - */ -public class Base64 extends BaseNCodec { - - /** - * BASE32 characters are 6 bits in length. - * They are formed by taking a block of 3 octets to form a 24-bit string, - * which is converted into 4 BASE64 characters. - */ - private static final int BITS_PER_ENCODED_BYTE = 6; - private static final int BYTES_PER_UNENCODED_BLOCK = 3; - private static final int BYTES_PER_ENCODED_BLOCK = 4; - - /** - * Chunk separator per RFC 2045 section 2.1. - * - * <p> - * N.B. The next major release may break compatibility and make this field private. - * </p> - * - * @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045 section 2.1</a> - */ - static final byte[] CHUNK_SEPARATOR = {'\r', '\n'}; - - /** - * This array is a lookup table that translates 6-bit positive integer index values into their "Base64 Alphabet" - * equivalents as specified in Table 1 of RFC 2045. - * - * Thanks to "commons" project in ws.apache.org for this code. - * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/ - */ - private static final byte[] STANDARD_ENCODE_TABLE = { - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', - 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', - 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', - 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', - '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' - }; - - /** - * This is a copy of the STANDARD_ENCODE_TABLE above, but with + and / - * changed to - and _ to make the encoded Base64 results more URL-SAFE. - * This table is only used when the Base64's mode is set to URL-SAFE. - */ - private static final byte[] URL_SAFE_ENCODE_TABLE = { - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', - 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', - 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', - 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', - '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '_' - }; - - /** - * This array is a lookup table that translates Unicode characters drawn from the "Base64 Alphabet" (as specified in - * Table 1 of RFC 2045) into their 6-bit positive integer equivalents. Characters that are not in the Base64 - * alphabet but fall within the bounds of the array are translated to -1. - * - * Note: '+' and '-' both decode to 62. '/' and '_' both decode to 63. This means decoder seamlessly handles both - * URL_SAFE and STANDARD base64. (The encoder, on the other hand, needs to know ahead of time what to emit). - * - * Thanks to "commons" project in ws.apache.org for this code. - * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/ - */ - private static final byte[] DECODE_TABLE = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, 62, -1, 63, 52, 53, 54, - 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, - 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, -1, -1, -1, -1, 63, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, - 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 - }; - - /** - * Base64 uses 6-bit fields. - */ - /** Mask used to extract 6 bits, used when encoding */ - private static final int MASK_6BITS = 0x3f; - - // The static final fields above are used for the original static byte[] methods on Base64. - // The private member fields below are used with the new streaming approach, which requires - // some state be preserved between calls of encode() and decode(). - - /** - * Encode table to use: either STANDARD or URL_SAFE. Note: the DECODE_TABLE above remains static because it is able - * to decode both STANDARD and URL_SAFE streams, but the encodeTable must be a member variable so we can switch - * between the two modes. - */ - private final byte[] encodeTable; - - // Only one decode table currently; keep for consistency with Base32 code - private final byte[] decodeTable = DECODE_TABLE; - - /** - * Line separator for encoding. Not used when decoding. Only used if lineLength > 0. - */ - private final byte[] lineSeparator; - - /** - * Convenience variable to help us determine when our buffer is going to run out of room and needs resizing. - * <code>decodeSize = 3 + lineSeparator.length;</code> - */ - private final int decodeSize; - - /** - * Convenience variable to help us determine when our buffer is going to run out of room and needs resizing. - * <code>encodeSize = 4 + lineSeparator.length;</code> - */ - private final int encodeSize; - - /** - * Place holder for the bytes we're dealing with for our based logic. - * Bitwise operations store and extract the encoding or decoding from this variable. - */ - private int bitWorkArea; - - /** - * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode. - * <p> - * When encoding the line length is 0 (no chunking), and the encoding table is STANDARD_ENCODE_TABLE. - * </p> - * - * <p> - * When decoding all variants are supported. - * </p> - */ - public Base64() { - this(0); - } - - /** - * Creates a Base64 codec used for decoding (all modes) and encoding in the given URL-safe mode. - * <p> - * When encoding the line length is 76, the line separator is CRLF, and the encoding table is STANDARD_ENCODE_TABLE. - * </p> - * - * <p> - * When decoding all variants are supported. - * </p> - * - * @param urlSafe - * if <code>true</code>, URL-safe encoding is used. In most cases this should be set to - * <code>false</code>. - * @since 1.4 - */ - public Base64(boolean urlSafe) { - this(MIME_CHUNK_SIZE, CHUNK_SEPARATOR, urlSafe); - } - - /** - * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode. - * <p> - * When encoding the line length is given in the constructor, the line separator is CRLF, and the encoding table is - * STANDARD_ENCODE_TABLE. - * </p> - * <p> - * Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data. - * </p> - * <p> - * When decoding all variants are supported. - * </p> - * - * @param lineLength - * Each line of encoded data will be at most of the given length (rounded down to nearest multiple of 4). - * If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding. - * @since 1.4 - */ - public Base64(int lineLength) { - this(lineLength, CHUNK_SEPARATOR); - } - - /** - * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode. - * <p> - * When encoding the line length and line separator are given in the constructor, and the encoding table is - * STANDARD_ENCODE_TABLE. - * </p> - * <p> - * Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data. - * </p> - * <p> - * When decoding all variants are supported. - * </p> - * - * @param lineLength - * Each line of encoded data will be at most of the given length (rounded down to nearest multiple of 4). - * If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding. - * @param lineSeparator - * Each line of encoded data will end with this sequence of bytes. - * @throws IllegalArgumentException - * Thrown when the provided lineSeparator included some base64 characters. - * @since 1.4 - */ - public Base64(int lineLength, byte[] lineSeparator) { - this(lineLength, lineSeparator, false); - } - - /** - * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode. - * <p> - * When encoding the line length and line separator are given in the constructor, and the encoding table is - * STANDARD_ENCODE_TABLE. - * </p> - * <p> - * Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data. - * </p> - * <p> - * When decoding all variants are supported. - * </p> - * - * @param lineLength - * Each line of encoded data will be at most of the given length (rounded down to nearest multiple of 4). - * If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding. - * @param lineSeparator - * Each line of encoded data will end with this sequence of bytes. - * @param urlSafe - * Instead of emitting '+' and '/' we emit '-' and '_' respectively. urlSafe is only applied to encode - * operations. Decoding seamlessly handles both modes. - * @throws IllegalArgumentException - * The provided lineSeparator included some base64 characters. That's not going to work! - * @since 1.4 - */ - public Base64(int lineLength, byte[] lineSeparator, boolean urlSafe) { - super(BYTES_PER_UNENCODED_BLOCK, BYTES_PER_ENCODED_BLOCK, - lineLength, - lineSeparator == null ? 0 : lineSeparator.length); - // TODO could be simplified if there is no requirement to reject invalid line sep when length <=0 - // @see test case Base64Test.testConstructors() - if (lineSeparator != null) { - if (containsAlphabetOrPad(lineSeparator)) { - String sep = StringUtils.newStringUtf8(lineSeparator); - throw new IllegalArgumentException("lineSeparator must not contain base64 characters: [" + sep + "]"); - } - if (lineLength > 0){ // null line-sep forces no chunking rather than throwing IAE - this.encodeSize = BYTES_PER_ENCODED_BLOCK + lineSeparator.length; - this.lineSeparator = new byte[lineSeparator.length]; - System.arraycopy(lineSeparator, 0, this.lineSeparator, 0, lineSeparator.length); - } else { - this.encodeSize = BYTES_PER_ENCODED_BLOCK; - this.lineSeparator = null; - } - } else { - this.encodeSize = BYTES_PER_ENCODED_BLOCK; - this.lineSeparator = null; - } - this.decodeSize = this.encodeSize - 1; - this.encodeTable = urlSafe ? URL_SAFE_ENCODE_TABLE : STANDARD_ENCODE_TABLE; - } - - /** - * Returns our current encode mode. True if we're URL-SAFE, false otherwise. - * - * @return true if we're in URL-SAFE mode, false otherwise. - * @since 1.4 - */ - public boolean isUrlSafe() { - return this.encodeTable == URL_SAFE_ENCODE_TABLE; - } - - /** - * <p> - * Encodes all of the provided data, starting at inPos, for inAvail bytes. Must be called at least twice: once with - * the data to encode, and once with inAvail set to "-1" to alert encoder that EOF has been reached, so flush last - * remaining bytes (if not multiple of 3). - * </p> - * <p> - * Thanks to "commons" project in ws.apache.org for the bitwise operations, and general approach. - * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/ - * </p> - * - * @param in - * byte[] array of binary data to base64 encode. - * @param inPos - * Position to start reading data from. - * @param inAvail - * Amount of bytes available from input for encoding. - */ - void encode(byte[] in, int inPos, int inAvail) { - if (eof) { - return; - } - // inAvail < 0 is how we're informed of EOF in the underlying data we're - // encoding. - if (inAvail < 0) { - eof = true; - if (0 == modulus && lineLength == 0) { - return; // no leftovers to process and not using chunking - } - ensureBufferSize(encodeSize); - int savedPos = pos; - switch (modulus) { // 0-2 - case 1 : // 8 bits = 6 + 2 - buffer[pos++] = encodeTable[(bitWorkArea >> 2) & MASK_6BITS]; // top 6 bits - buffer[pos++] = encodeTable[(bitWorkArea << 4) & MASK_6BITS]; // remaining 2 - // URL-SAFE skips the padding to further reduce size. - if (encodeTable == STANDARD_ENCODE_TABLE) { - buffer[pos++] = PAD; - buffer[pos++] = PAD; - } - break; - - case 2 : // 16 bits = 6 + 6 + 4 - buffer[pos++] = encodeTable[(bitWorkArea >> 10) & MASK_6BITS]; - buffer[pos++] = encodeTable[(bitWorkArea >> 4) & MASK_6BITS]; - buffer[pos++] = encodeTable[(bitWorkArea << 2) & MASK_6BITS]; - // URL-SAFE skips the padding to further reduce size. - if (encodeTable == STANDARD_ENCODE_TABLE) { - buffer[pos++] = PAD; - } - break; - } - currentLinePos += pos - savedPos; // keep track of current line position - // if currentPos == 0 we are at the start of a line, so don't add CRLF - if (lineLength > 0 && currentLinePos > 0) { - System.arraycopy(lineSeparator, 0, buffer, pos, lineSeparator.length); - pos += lineSeparator.length; - } - } else { - for (int i = 0; i < inAvail; i++) { - ensureBufferSize(encodeSize); - modulus = (modulus+1) % BYTES_PER_UNENCODED_BLOCK; - int b = in[inPos++]; - if (b < 0) { - b += 256; - } - bitWorkArea = (bitWorkArea << 8) + b; // BITS_PER_BYTE - if (0 == modulus) { // 3 bytes = 24 bits = 4 * 6 bits to extract - buffer[pos++] = encodeTable[(bitWorkArea >> 18) & MASK_6BITS]; - buffer[pos++] = encodeTable[(bitWorkArea >> 12) & MASK_6BITS]; - buffer[pos++] = encodeTable[(bitWorkArea >> 6) & MASK_6BITS]; - buffer[pos++] = encodeTable[bitWorkArea & MASK_6BITS]; - currentLinePos += BYTES_PER_ENCODED_BLOCK; - if (lineLength > 0 && lineLength <= currentLinePos) { - System.arraycopy(lineSeparator, 0, buffer, pos, lineSeparator.length); - pos += lineSeparator.length; - currentLinePos = 0; - } - } - } - } - } - - /** - * <p> - * Decodes all of the provided data, starting at inPos, for inAvail bytes. Should be called at least twice: once - * with the data to decode, and once with inAvail set to "-1" to alert decoder that EOF has been reached. The "-1" - * call is not necessary when decoding, but it doesn't hurt, either. - * </p> - * <p> - * Ignores all non-base64 characters. This is how chunked (e.g. 76 character) data is handled, since CR and LF are - * silently ignored, but has implications for other bytes, too. This method subscribes to the garbage-in, - * garbage-out philosophy: it will not check the provided data for validity. - * </p> - * <p> - * Thanks to "commons" project in ws.apache.org for the bitwise operations, and general approach. - * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/ - * </p> - * - * @param in - * byte[] array of ascii data to base64 decode. - * @param inPos - * Position to start reading data from. - * @param inAvail - * Amount of bytes available from input for encoding. - */ - void decode(byte[] in, int inPos, int inAvail) { - if (eof) { - return; - } - if (inAvail < 0) { - eof = true; - } - for (int i = 0; i < inAvail; i++) { - ensureBufferSize(decodeSize); - byte b = in[inPos++]; - if (b == PAD) { - // We're done. - eof = true; - break; - } else { - if (b >= 0 && b < DECODE_TABLE.length) { - int result = DECODE_TABLE[b]; - if (result >= 0) { - modulus = (modulus+1) % BYTES_PER_ENCODED_BLOCK; - bitWorkArea = (bitWorkArea << BITS_PER_ENCODED_BYTE) + result; - if (modulus == 0) { - buffer[pos++] = (byte) ((bitWorkArea >> 16) & MASK_8BITS); - buffer[pos++] = (byte) ((bitWorkArea >> 8) & MASK_8BITS); - buffer[pos++] = (byte) (bitWorkArea & MASK_8BITS); - } - } - } - } - } - - // Two forms of EOF as far as base64 decoder is concerned: actual - // EOF (-1) and first time '=' character is encountered in stream. - // This approach makes the '=' padding characters completely optional. - if (eof && modulus != 0) { - ensureBufferSize(decodeSize); - - // We have some spare bits remaining - // Output all whole multiples of 8 bits and ignore the rest - switch (modulus) { - // case 1: // 6 bits - ignore entirely - // break; - case 2 : // 12 bits = 8 + 4 - bitWorkArea = bitWorkArea >> 4; // dump the extra 4 bits - buffer[pos++] = (byte) ((bitWorkArea) & MASK_8BITS); - break; - case 3 : // 18 bits = 8 + 8 + 2 - bitWorkArea = bitWorkArea >> 2; // dump 2 bits - buffer[pos++] = (byte) ((bitWorkArea >> 8) & MASK_8BITS); - buffer[pos++] = (byte) ((bitWorkArea) & MASK_8BITS); - break; - } - } - } - - /** - * Returns whether or not the <code>octet</code> is in the base 64 alphabet. - * - * @param octet - * The value to test - * @return <code>true</code> if the value is defined in the the base 64 alphabet, <code>false</code> otherwise. - * @since 1.4 - */ - public static boolean isBase64(byte octet) { - return octet == PAD_DEFAULT || (octet >= 0 && octet < DECODE_TABLE.length && DECODE_TABLE[octet] != -1); - } - - /** - * Tests a given String to see if it contains only valid characters within the Base64 alphabet. Currently the - * method treats whitespace as valid. - * - * @param base64 - * String to test - * @return <code>true</code> if all characters in the String are valid characters in the Base64 alphabet or if - * the String is empty; <code>false</code>, otherwise - * @since 1.5 - */ - public static boolean isBase64(String base64) { - return isBase64(StringUtils.getBytesUtf8(base64)); - } - - /** - * Tests a given byte array to see if it contains only valid characters within the Base64 alphabet. Currently the - * method treats whitespace as valid. - * - * @param arrayOctet - * byte array to test - * @return <code>true</code> if all bytes are valid characters in the Base64 alphabet or if the byte array is empty; - * <code>false</code>, otherwise - * @deprecated 1.5 Use {@link #isBase64(byte[])}, will be removed in 2.0. - */ - public static boolean isArrayByteBase64(byte[] arrayOctet) { - return isBase64(arrayOctet); - } - - /** - * Tests a given byte array to see if it contains only valid characters within the Base64 alphabet. Currently the - * method treats whitespace as valid. - * - * @param arrayOctet - * byte array to test - * @return <code>true</code> if all bytes are valid characters in the Base64 alphabet or if the byte array is empty; - * <code>false</code>, otherwise - * @since 1.5 - */ - public static boolean isBase64(byte[] arrayOctet) { - for (int i = 0; i < arrayOctet.length; i++) { - if (!isBase64(arrayOctet[i]) && !isWhiteSpace(arrayOctet[i])) { - return false; - } - } - return true; - } - - /** - * Encodes binary data using the base64 algorithm but does not chunk the output. - * - * @param binaryData - * binary data to encode - * @return byte[] containing Base64 characters in their UTF-8 representation. - */ - public static byte[] encodeBase64(byte[] binaryData) { - return encodeBase64(binaryData, false); - } - - /** - * Encodes binary data using the base64 algorithm but does not chunk the output. - * - * NOTE: We changed the behaviour of this method from multi-line chunking (commons-codec-1.4) to - * single-line non-chunking (commons-codec-1.5). - * - * @param binaryData - * binary data to encode - * @return String containing Base64 characters. - * @since 1.4 (NOTE: 1.4 chunked the output, whereas 1.5 does not). - */ - public static String encodeBase64String(byte[] binaryData) { - return StringUtils.newStringUtf8(encodeBase64(binaryData, false)); - } - - /** - * Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output. The - * url-safe variation emits - and _ instead of + and / characters. - * - * @param binaryData - * binary data to encode - * @return byte[] containing Base64 characters in their UTF-8 representation. - * @since 1.4 - */ - public static byte[] encodeBase64URLSafe(byte[] binaryData) { - return encodeBase64(binaryData, false, true); - } - - /** - * Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output. The - * url-safe variation emits - and _ instead of + and / characters. - * - * @param binaryData - * binary data to encode - * @return String containing Base64 characters - * @since 1.4 - */ - public static String encodeBase64URLSafeString(byte[] binaryData) { - return StringUtils.newStringUtf8(encodeBase64(binaryData, false, true)); - } - - /** - * Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks - * - * @param binaryData - * binary data to encode - * @return Base64 characters chunked in 76 character blocks - */ - public static byte[] encodeBase64Chunked(byte[] binaryData) { - return encodeBase64(binaryData, true); - } - - /** - * Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks. - * - * @param binaryData - * Array containing binary data to encode. - * @param isChunked - * if <code>true</code> this encoder will chunk the base64 output into 76 character blocks - * @return Base64-encoded data. - * @throws IllegalArgumentException - * Thrown when the input array needs an output array bigger than {@link Integer#MAX_VALUE} - */ - public static byte[] encodeBase64(byte[] binaryData, boolean isChunked) { - return encodeBase64(binaryData, isChunked, false); - } - - /** - * Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks. - * - * @param binaryData - * Array containing binary data to encode. - * @param isChunked - * if <code>true</code> this encoder will chunk the base64 output into 76 character blocks - * @param urlSafe - * if <code>true</code> this encoder will emit - and _ instead of the usual + and / characters. - * @return Base64-encoded data. - * @throws IllegalArgumentException - * Thrown when the input array needs an output array bigger than {@link Integer#MAX_VALUE} - * @since 1.4 - */ - public static byte[] encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe) { - return encodeBase64(binaryData, isChunked, urlSafe, Integer.MAX_VALUE); - } - - /** - * Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks. - * - * @param binaryData - * Array containing binary data to encode. - * @param isChunked - * if <code>true</code> this encoder will chunk the base64 output into 76 character blocks - * @param urlSafe - * if <code>true</code> this encoder will emit - and _ instead of the usual + and / characters. - * @param maxResultSize - * The maximum result size to accept. - * @return Base64-encoded data. - * @throws IllegalArgumentException - * Thrown when the input array needs an output array bigger than maxResultSize - * @since 1.4 - */ - public static byte[] encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe, int maxResultSize) { - if (binaryData == null || binaryData.length == 0) { - return binaryData; - } - - // Create this so can use the super-class method - // Also ensures that the same roundings are performed by the ctor and the code - Base64 b64 = isChunked ? new Base64(urlSafe) : new Base64(0, CHUNK_SEPARATOR, urlSafe); - long len = b64.getEncodedLength(binaryData); - if (len > maxResultSize) { - throw new IllegalArgumentException("Input array too big, the output array would be bigger (" + - len + - ") than the specified maximum size of " + - maxResultSize); - } - - return b64.encode(binaryData); - } - - /** - * Decodes a Base64 String into octets - * - * @param base64String - * String containing Base64 data - * @return Array containing decoded data. - * @since 1.4 - */ - public static byte[] decodeBase64(String base64String) { - return new Base64().decode(base64String); - } - - /** - * Decodes Base64 data into octets - * - * @param base64Data - * Byte array containing Base64 data - * @return Array containing decoded data. - */ - public static byte[] decodeBase64(byte[] base64Data) { - return new Base64().decode(base64Data); - } - - // Implementation of the Encoder Interface - - // Implementation of integer encoding used for crypto - /** - * Decodes a byte64-encoded integer according to crypto standards such as W3C's XML-Signature - * - * @param pArray - * a byte array containing base64 character data - * @return A BigInteger - * @since 1.4 - */ - public static BigInteger decodeInteger(byte[] pArray) { - return new BigInteger(1, decodeBase64(pArray)); - } - - /** - * Encodes to a byte64-encoded integer according to crypto standards such as W3C's XML-Signature - * - * @param bigInt - * a BigInteger - * @return A byte array containing base64 character data - * @throws NullPointerException - * if null is passed in - * @since 1.4 - */ - public static byte[] encodeInteger(BigInteger bigInt) { - if (bigInt == null) { - throw new NullPointerException("encodeInteger called with null parameter"); - } - return encodeBase64(toIntegerBytes(bigInt), false); - } - - /** - * Returns a byte-array representation of a <code>BigInteger</code> without sign bit. - * - * @param bigInt - * <code>BigInteger</code> to be converted - * @return a byte array representation of the BigInteger parameter - */ - static byte[] toIntegerBytes(BigInteger bigInt) { - int bitlen = bigInt.bitLength(); - // round bitlen - bitlen = ((bitlen + 7) >> 3) << 3; - byte[] bigBytes = bigInt.toByteArray(); - - if (((bigInt.bitLength() % 8) != 0) && (((bigInt.bitLength() / 8) + 1) == (bitlen / 8))) { - return bigBytes; - } - // set up params for copying everything but sign bit - int startSrc = 0; - int len = bigBytes.length; - - // if bigInt is exactly byte-aligned, just skip signbit in copy - if ((bigInt.bitLength() % 8) == 0) { - startSrc = 1; - len--; - } - int startDst = bitlen / 8 - len; // to pad w/ nulls as per spec - byte[] resizedBytes = new byte[bitlen / 8]; - System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, len); - return resizedBytes; - } - - /** - * Returns whether or not the <code>octet</code> is in the Base32 alphabet. - * - * @param octet - * The value to test - * @return <code>true</code> if the value is defined in the the Base32 alphabet <code>false</code> otherwise. - */ - protected boolean isInAlphabet(byte octet) { - return octet >= 0 && octet < decodeTable.length && decodeTable[octet] != -1; - } - -} |