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optional flag to allow using the standard base64 charset on decode/encode, rather than the (filename friendly) i2p charset

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This commit is contained in:
jrandom
2004-08-11 00:59:11 +00:00
committed by zzz
parent 0aa023189d
commit cdd74505d7
1 changed files with 20 additions and 8 deletions
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28
core/java/src/net/i2p/data/Base64.java
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@ -43,11 +43,14 @@ public class Base64 {
private final static Log _log = new Log(Base64.class); private final static Log _log = new Log(Base64.class);
public static String encode(byte[] source) { public static String encode(byte[] source) {
return safeEncode(source); return encode(source, false);
}
public static String encode(byte[] source, boolean useStandardAlphabet) {
return safeEncode(source, useStandardAlphabet);
} }
public static byte[] decode(String s) { public static byte[] decode(String s) {
return safeDecode(s); return safeDecode(s, false);
} }
/** Maximum line length (76) of Base64 output. */ /** Maximum line length (76) of Base64 output. */
@ -315,10 +318,14 @@ public class Base64 {
* Same as encodeBytes, except uses a filesystem / URL friendly set of characters, * Same as encodeBytes, except uses a filesystem / URL friendly set of characters,
* replacing / with ~, and + with - * replacing / with ~, and + with -
*/ */
private static String safeEncode(byte[] source) { private static String safeEncode(byte[] source, boolean useStandardAlphabet) {
String encoded = encodeBytes(source); String encoded = encodeBytes(source);
encoded = encoded.replace('/', '~'); if (useStandardAlphabet) {
encoded = encoded.replace('+', '-'); // noop
} else {
encoded = encoded.replace('/', '~');
encoded = encoded.replace('+', '-');
}
return encoded; return encoded;
} }
@ -326,9 +333,14 @@ public class Base64 {
* Same as decode, except from a filesystem / URL friendly set of characters, * Same as decode, except from a filesystem / URL friendly set of characters,
* replacing / with ~, and + with - * replacing / with ~, and + with -
*/ */
private static byte[] safeDecode(String source) { private static byte[] safeDecode(String source, boolean useStandardAlphabet) {
String toDecode = source.replace('~', '/'); String toDecode = null;
toDecode = toDecode.replace('-', '+'); if (useStandardAlphabet) {
toDecode = source;
} else {
toDecode = source.replace('~', '/');
toDecode = toDecode.replace('-', '+');
}
return standardDecode(toDecode); return standardDecode(toDecode);
} }