diff options
Diffstat (limited to 'src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java')
| -rw-r--r-- | src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java | 498 |
1 files changed, 237 insertions, 261 deletions
diff --git a/src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java b/src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java index 65923b65..db43b474 100644 --- a/src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java +++ b/src/main/java/org/yaml/snakeyaml/external/biz/base64Coder/Base64Coder.java @@ -4,11 +4,11 @@ // This module is multi-licensed and may be used under the terms // of any of the following licenses: // -// EPL, Eclipse Public License, V1.0 or later, http://www.eclipse.org/legal -// LGPL, GNU Lesser General Public License, V2.1 or later, http://www.gnu.org/licenses/lgpl.html -// GPL, GNU General Public License, V2 or later, http://www.gnu.org/licenses/gpl.html -// AL, Apache License, V2.0 or later, http://www.apache.org/licenses -// BSD, BSD License, http://www.opensource.org/licenses/bsd-license.php +// EPL, Eclipse Public License, V1.0 or later, http://www.eclipse.org/legal +// LGPL, GNU Lesser General Public License, V2.1 or later, http://www.gnu.org/licenses/lgpl.html +// GPL, GNU General Public License, V2 or later, http://www.gnu.org/licenses/gpl.html +// AL, Apache License, V2.0 or later, http://www.apache.org/licenses +// BSD, BSD License, http://www.opensource.org/licenses/bsd-license.php // // Please contact the author if you need another license. // This module is provided "as is", without warranties of any kind. @@ -17,289 +17,265 @@ package org.yaml.snakeyaml.external.biz.base64Coder; /** * A Base64 encoder/decoder. - * + * * <p> - * This class is used to encode and decode data in Base64 format as described in - * RFC 1521. - * + * This class is used to encode and decode data in Base64 format as described in RFC 1521. + * * <p> - * Project home page: <a - * href="http://www.source-code.biz/base64coder/java/">www. + * Project home page: <a href="http://www.source-code.biz/base64coder/java/">www. * source-code.biz/base64coder/java</a><br> * Author: Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland<br> * Multi-licensed: EPL / LGPL / GPL / AL / BSD. */ public class Base64Coder { - // The line separator string of the operating system. - private static final String systemLineSeparator = System.getProperty("line.separator"); + // The line separator string of the operating system. + private static final String systemLineSeparator = System.getProperty("line.separator"); - // Mapping table from 6-bit nibbles to Base64 characters. - private static char[] map1 = new char[64]; - static { - int i = 0; - for (char c = 'A'; c <= 'Z'; c++) - map1[i++] = c; - for (char c = 'a'; c <= 'z'; c++) - map1[i++] = c; - for (char c = '0'; c <= '9'; c++) - map1[i++] = c; - map1[i++] = '+'; - map1[i++] = '/'; - } + // Mapping table from 6-bit nibbles to Base64 characters. + private static final char[] map1 = new char[64]; - // Mapping table from Base64 characters to 6-bit nibbles. - private static byte[] map2 = new byte[128]; - static { - for (int i = 0; i < map2.length; i++) - map2[i] = -1; - for (int i = 0; i < 64; i++) - map2[map1[i]] = (byte) i; + static { + int i = 0; + for (char c = 'A'; c <= 'Z'; c++) { + map1[i++] = c; } - - /** - * Encodes a string into Base64 format. No blanks or line breaks are - * inserted. - * - * @param s - * A String to be encoded. - * @return A String containing the Base64 encoded data. - */ - public static String encodeString(String s) { - return new String(encode(s.getBytes())); + for (char c = 'a'; c <= 'z'; c++) { + map1[i++] = c; } - - /** - * Encodes a byte array into Base 64 format and breaks the output into lines - * of 76 characters. This method is compatible with - * <code>sun.misc.BASE64Encoder.encodeBuffer(byte[])</code>. - * - * @param in - * An array containing the data bytes to be encoded. - * @return A String containing the Base64 encoded data, broken into lines. - */ - public static String encodeLines(byte[] in) { - return encodeLines(in, 0, in.length, 76, systemLineSeparator); + for (char c = '0'; c <= '9'; c++) { + map1[i++] = c; } + map1[i++] = '+'; + map1[i++] = '/'; + } - /** - * Encodes a byte array into Base 64 format and breaks the output into - * lines. - * - * @param in - * An array containing the data bytes to be encoded. - * @param iOff - * Offset of the first byte in <code>in</code> to be processed. - * @param iLen - * Number of bytes to be processed in <code>in</code>, starting - * at <code>iOff</code>. - * @param lineLen - * Line length for the output data. Should be a multiple of 4. - * @param lineSeparator - * The line separator to be used to separate the output lines. - * @return A String containing the Base64 encoded data, broken into lines. - */ - public static String encodeLines(byte[] in, int iOff, int iLen, int lineLen, - String lineSeparator) { - int blockLen = (lineLen * 3) / 4; - if (blockLen <= 0) - throw new IllegalArgumentException(); - int lines = (iLen + blockLen - 1) / blockLen; - int bufLen = ((iLen + 2) / 3) * 4 + lines * lineSeparator.length(); - StringBuilder buf = new StringBuilder(bufLen); - int ip = 0; - while (ip < iLen) { - int l = Math.min(iLen - ip, blockLen); - buf.append(encode(in, iOff + ip, l)); - buf.append(lineSeparator); - ip += l; - } - return buf.toString(); - } + // Mapping table from Base64 characters to 6-bit nibbles. + private static final byte[] map2 = new byte[128]; - /** - * Encodes a byte array into Base64 format. No blanks or line breaks are - * inserted in the output. - * - * @param in - * An array containing the data bytes to be encoded. - * @return A character array containing the Base64 encoded data. - */ - public static char[] encode(byte[] in) { - return encode(in, 0, in.length); + static { + for (int i = 0; i < map2.length; i++) { + map2[i] = -1; } - - /** - * Encodes a byte array into Base64 format. No blanks or line breaks are - * inserted in the output. - * - * @param in - * An array containing the data bytes to be encoded. - * @param iLen - * Number of bytes to process in <code>in</code>. - * @return A character array containing the Base64 encoded data. - */ - public static char[] encode(byte[] in, int iLen) { - return encode(in, 0, iLen); + for (int i = 0; i < 64; i++) { + map2[map1[i]] = (byte) i; } + } - /** - * Encodes a byte array into Base64 format. No blanks or line breaks are - * inserted in the output. - * - * @param in - * An array containing the data bytes to be encoded. - * @param iOff - * Offset of the first byte in <code>in</code> to be processed. - * @param iLen - * Number of bytes to process in <code>in</code>, starting at - * <code>iOff</code>. - * @return A character array containing the Base64 encoded data. - */ - public static char[] encode(byte[] in, int iOff, int iLen) { - int oDataLen = (iLen * 4 + 2) / 3; // output length without padding - int oLen = ((iLen + 2) / 3) * 4; // output length including padding - char[] out = new char[oLen]; - int ip = iOff; - int iEnd = iOff + iLen; - int op = 0; - while (ip < iEnd) { - int i0 = in[ip++] & 0xff; - int i1 = ip < iEnd ? in[ip++] & 0xff : 0; - int i2 = ip < iEnd ? in[ip++] & 0xff : 0; - int o0 = i0 >>> 2; - int o1 = ((i0 & 3) << 4) | (i1 >>> 4); - int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6); - int o3 = i2 & 0x3F; - out[op++] = map1[o0]; - out[op++] = map1[o1]; - out[op] = op < oDataLen ? map1[o2] : '='; - op++; - out[op] = op < oDataLen ? map1[o3] : '='; - op++; - } - return out; - } + /** + * Encodes a string into Base64 format. No blanks or line breaks are inserted. + * + * @param s A String to be encoded. + * @return A String containing the Base64 encoded data. + */ + public static String encodeString(String s) { + return new String(encode(s.getBytes())); + } - /** - * Decodes a string from Base64 format. No blanks or line breaks are allowed - * within the Base64 encoded input data. - * - * @param s - * A Base64 String to be decoded. - * @return A String containing the decoded data. - * @throws IllegalArgumentException - * If the input is not valid Base64 encoded data. - */ - public static String decodeString(String s) { - return new String(decode(s)); - } + /** + * Encodes a byte array into Base 64 format and breaks the output into lines of 76 characters. + * This method is compatible with <code>sun.misc.BASE64Encoder.encodeBuffer(byte[])</code>. + * + * @param in An array containing the data bytes to be encoded. + * @return A String containing the Base64 encoded data, broken into lines. + */ + public static String encodeLines(byte[] in) { + return encodeLines(in, 0, in.length, 76, systemLineSeparator); + } - /** - * Decodes a byte array from Base64 format and ignores line separators, tabs - * and blanks. CR, LF, Tab and Space characters are ignored in the input - * data. This method is compatible with - * <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>. - * - * @param s - * A Base64 String to be decoded. - * @return An array containing the decoded data bytes. - * @throws IllegalArgumentException - * If the input is not valid Base64 encoded data. - */ - public static byte[] decodeLines(String s) { - char[] buf = new char[s.length()]; - int p = 0; - for (int ip = 0; ip < s.length(); ip++) { - char c = s.charAt(ip); - if (c != ' ' && c != '\r' && c != '\n' && c != '\t') - buf[p++] = c; - } - return decode(buf, 0, p); + /** + * Encodes a byte array into Base 64 format and breaks the output into lines. + * + * @param in An array containing the data bytes to be encoded. + * @param iOff Offset of the first byte in <code>in</code> to be processed. + * @param iLen Number of bytes to be processed in <code>in</code>, starting at <code>iOff</code>. + * @param lineLen Line length for the output data. Should be a multiple of 4. + * @param lineSeparator The line separator to be used to separate the output lines. + * @return A String containing the Base64 encoded data, broken into lines. + */ + public static String encodeLines(byte[] in, int iOff, int iLen, int lineLen, + String lineSeparator) { + int blockLen = (lineLen * 3) / 4; + if (blockLen <= 0) { + throw new IllegalArgumentException(); } - - /** - * Decodes a byte array from Base64 format. No blanks or line breaks are - * allowed within the Base64 encoded input data. - * - * @param s - * A Base64 String to be decoded. - * @return An array containing the decoded data bytes. - * @throws IllegalArgumentException - * If the input is not valid Base64 encoded data. - */ - public static byte[] decode(String s) { - return decode(s.toCharArray()); + int lines = (iLen + blockLen - 1) / blockLen; + int bufLen = ((iLen + 2) / 3) * 4 + lines * lineSeparator.length(); + StringBuilder buf = new StringBuilder(bufLen); + int ip = 0; + while (ip < iLen) { + int l = Math.min(iLen - ip, blockLen); + buf.append(encode(in, iOff + ip, l)); + buf.append(lineSeparator); + ip += l; } + return buf.toString(); + } - /** - * Decodes a byte array from Base64 format. No blanks or line breaks are - * allowed within the Base64 encoded input data. - * - * @param in - * A character array containing the Base64 encoded data. - * @return An array containing the decoded data bytes. - * @throws IllegalArgumentException - * If the input is not valid Base64 encoded data. - */ - public static byte[] decode(char[] in) { - return decode(in, 0, in.length); + /** + * Encodes a byte array into Base64 format. No blanks or line breaks are inserted in the output. + * + * @param in An array containing the data bytes to be encoded. + * @return A character array containing the Base64 encoded data. + */ + public static char[] encode(byte[] in) { + return encode(in, 0, in.length); + } + + /** + * Encodes a byte array into Base64 format. No blanks or line breaks are inserted in the output. + * + * @param in An array containing the data bytes to be encoded. + * @param iLen Number of bytes to process in <code>in</code>. + * @return A character array containing the Base64 encoded data. + */ + public static char[] encode(byte[] in, int iLen) { + return encode(in, 0, iLen); + } + + /** + * Encodes a byte array into Base64 format. No blanks or line breaks are inserted in the output. + * + * @param in An array containing the data bytes to be encoded. + * @param iOff Offset of the first byte in <code>in</code> to be processed. + * @param iLen Number of bytes to process in <code>in</code>, starting at <code>iOff</code>. + * @return A character array containing the Base64 encoded data. + */ + public static char[] encode(byte[] in, int iOff, int iLen) { + int oDataLen = (iLen * 4 + 2) / 3; // output length without padding + int oLen = ((iLen + 2) / 3) * 4; // output length including padding + char[] out = new char[oLen]; + int ip = iOff; + int iEnd = iOff + iLen; + int op = 0; + while (ip < iEnd) { + int i0 = in[ip++] & 0xff; + int i1 = ip < iEnd ? in[ip++] & 0xff : 0; + int i2 = ip < iEnd ? in[ip++] & 0xff : 0; + int o0 = i0 >>> 2; + int o1 = ((i0 & 3) << 4) | (i1 >>> 4); + int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6); + int o3 = i2 & 0x3F; + out[op++] = map1[o0]; + out[op++] = map1[o1]; + out[op] = op < oDataLen ? map1[o2] : '='; + op++; + out[op] = op < oDataLen ? map1[o3] : '='; + op++; } + return out; + } - /** - * Decodes a byte array from Base64 format. No blanks or line breaks are - * allowed within the Base64 encoded input data. - * - * @param in - * A character array containing the Base64 encoded data. - * @param iOff - * Offset of the first character in <code>in</code> to be - * processed. - * @param iLen - * Number of characters to process in <code>in</code>, starting - * at <code>iOff</code>. - * @return An array containing the decoded data bytes. - * @throws IllegalArgumentException - * If the input is not valid Base64 encoded data. - */ - public static byte[] decode(char[] in, int iOff, int iLen) { - if (iLen % 4 != 0) - throw new IllegalArgumentException( - "Length of Base64 encoded input string is not a multiple of 4."); - while (iLen > 0 && in[iOff + iLen - 1] == '=') - iLen--; - int oLen = (iLen * 3) / 4; - byte[] out = new byte[oLen]; - int ip = iOff; - int iEnd = iOff + iLen; - int op = 0; - while (ip < iEnd) { - int i0 = in[ip++]; - int i1 = in[ip++]; - int i2 = ip < iEnd ? in[ip++] : 'A'; - int i3 = ip < iEnd ? in[ip++] : 'A'; - if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127) - throw new IllegalArgumentException("Illegal character in Base64 encoded data."); - int b0 = map2[i0]; - int b1 = map2[i1]; - int b2 = map2[i2]; - int b3 = map2[i3]; - if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0) - throw new IllegalArgumentException("Illegal character in Base64 encoded data."); - int o0 = (b0 << 2) | (b1 >>> 4); - int o1 = ((b1 & 0xf) << 4) | (b2 >>> 2); - int o2 = ((b2 & 3) << 6) | b3; - out[op++] = (byte) o0; - if (op < oLen) - out[op++] = (byte) o1; - if (op < oLen) - out[op++] = (byte) o2; - } - return out; + /** + * Decodes a string from Base64 format. No blanks or line breaks are allowed within the Base64 + * encoded input data. + * + * @param s A Base64 String to be decoded. + * @return A String containing the decoded data. + * @throws IllegalArgumentException If the input is not valid Base64 encoded data. + */ + public static String decodeString(String s) { + return new String(decode(s)); + } + + /** + * Decodes a byte array from Base64 format and ignores line separators, tabs and blanks. CR, LF, + * Tab and Space characters are ignored in the input data. This method is compatible with + * <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>. + * + * @param s A Base64 String to be decoded. + * @return An array containing the decoded data bytes. + * @throws IllegalArgumentException If the input is not valid Base64 encoded data. + */ + public static byte[] decodeLines(String s) { + char[] buf = new char[s.length()]; + int p = 0; + for (int ip = 0; ip < s.length(); ip++) { + char c = s.charAt(ip); + if (c != ' ' && c != '\r' && c != '\n' && c != '\t') { + buf[p++] = c; + } } + return decode(buf, 0, p); + } + + /** + * Decodes a byte array from Base64 format. No blanks or line breaks are allowed within the Base64 + * encoded input data. + * + * @param s A Base64 String to be decoded. + * @return An array containing the decoded data bytes. + * @throws IllegalArgumentException If the input is not valid Base64 encoded data. + */ + public static byte[] decode(String s) { + return decode(s.toCharArray()); + } - // Dummy constructor. - private Base64Coder() { + /** + * Decodes a byte array from Base64 format. No blanks or line breaks are allowed within the Base64 + * encoded input data. + * + * @param in A character array containing the Base64 encoded data. + * @return An array containing the decoded data bytes. + * @throws IllegalArgumentException If the input is not valid Base64 encoded data. + */ + public static byte[] decode(char[] in) { + return decode(in, 0, in.length); + } + + /** + * Decodes a byte array from Base64 format. No blanks or line breaks are allowed within the Base64 + * encoded input data. + * + * @param in A character array containing the Base64 encoded data. + * @param iOff Offset of the first character in <code>in</code> to be processed. + * @param iLen Number of characters to process in <code>in</code>, starting at <code>iOff</code>. + * @return An array containing the decoded data bytes. + * @throws IllegalArgumentException If the input is not valid Base64 encoded data. + */ + public static byte[] decode(char[] in, int iOff, int iLen) { + if (iLen % 4 != 0) { + throw new IllegalArgumentException( + "Length of Base64 encoded input string is not a multiple of 4."); + } + while (iLen > 0 && in[iOff + iLen - 1] == '=') { + iLen--; } + int oLen = (iLen * 3) / 4; + byte[] out = new byte[oLen]; + int ip = iOff; + int iEnd = iOff + iLen; + int op = 0; + while (ip < iEnd) { + int i0 = in[ip++]; + int i1 = in[ip++]; + int i2 = ip < iEnd ? in[ip++] : 'A'; + int i3 = ip < iEnd ? in[ip++] : 'A'; + if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127) { + throw new IllegalArgumentException("Illegal character in Base64 encoded data."); + } + int b0 = map2[i0]; + int b1 = map2[i1]; + int b2 = map2[i2]; + int b3 = map2[i3]; + if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0) { + throw new IllegalArgumentException("Illegal character in Base64 encoded data."); + } + int o0 = (b0 << 2) | (b1 >>> 4); + int o1 = ((b1 & 0xf) << 4) | (b2 >>> 2); + int o2 = ((b2 & 3) << 6) | b3; + out[op++] = (byte) o0; + if (op < oLen) { + out[op++] = (byte) o1; + } + if (op < oLen) { + out[op++] = (byte) o2; + } + } + return out; + } + + // Dummy constructor. + private Base64Coder() {} } // end class Base64Coder |