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path: root/core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java
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Diffstat (limited to 'core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java')
-rw-r--r--core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java331
1 files changed, 0 insertions, 331 deletions
diff --git a/core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java b/core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java
deleted file mode 100644
index abad02c5..00000000
--- a/core/src/main/java/org/bouncycastle/util/encoders/Base64Encoder.java
+++ /dev/null
@@ -1,331 +0,0 @@
-package org.bouncycastle.util.encoders;
-
-import java.io.IOException;
-import java.io.OutputStream;
-
-/**
- * A streaming Base64 encoder.
- */
-public class Base64Encoder
- implements Encoder
-{
- protected final byte[] encodingTable =
- {
- (byte)'A', (byte)'B', (byte)'C', (byte)'D', (byte)'E', (byte)'F', (byte)'G',
- (byte)'H', (byte)'I', (byte)'J', (byte)'K', (byte)'L', (byte)'M', (byte)'N',
- (byte)'O', (byte)'P', (byte)'Q', (byte)'R', (byte)'S', (byte)'T', (byte)'U',
- (byte)'V', (byte)'W', (byte)'X', (byte)'Y', (byte)'Z',
- (byte)'a', (byte)'b', (byte)'c', (byte)'d', (byte)'e', (byte)'f', (byte)'g',
- (byte)'h', (byte)'i', (byte)'j', (byte)'k', (byte)'l', (byte)'m', (byte)'n',
- (byte)'o', (byte)'p', (byte)'q', (byte)'r', (byte)'s', (byte)'t', (byte)'u',
- (byte)'v',
- (byte)'w', (byte)'x', (byte)'y', (byte)'z',
- (byte)'0', (byte)'1', (byte)'2', (byte)'3', (byte)'4', (byte)'5', (byte)'6',
- (byte)'7', (byte)'8', (byte)'9',
- (byte)'+', (byte)'/'
- };
-
- protected byte padding = (byte)'=';
-
- /*
- * set up the decoding table.
- */
- protected final byte[] decodingTable = new byte[128];
-
- protected void initialiseDecodingTable()
- {
- for (int i = 0; i < decodingTable.length; i++)
- {
- decodingTable[i] = (byte)0xff;
- }
-
- for (int i = 0; i < encodingTable.length; i++)
- {
- decodingTable[encodingTable[i]] = (byte)i;
- }
- }
-
- public Base64Encoder()
- {
- initialiseDecodingTable();
- }
-
- /**
- * encode the input data producing a base 64 output stream.
- *
- * @return the number of bytes produced.
- */
- public int encode(
- byte[] data,
- int off,
- int length,
- OutputStream out)
- throws IOException
- {
- int modulus = length % 3;
- int dataLength = (length - modulus);
- int a1, a2, a3;
-
- for (int i = off; i < off + dataLength; i += 3)
- {
- a1 = data[i] & 0xff;
- a2 = data[i + 1] & 0xff;
- a3 = data[i + 2] & 0xff;
-
- out.write(encodingTable[(a1 >>> 2) & 0x3f]);
- out.write(encodingTable[((a1 << 4) | (a2 >>> 4)) & 0x3f]);
- out.write(encodingTable[((a2 << 2) | (a3 >>> 6)) & 0x3f]);
- out.write(encodingTable[a3 & 0x3f]);
- }
-
- /*
- * process the tail end.
- */
- int b1, b2, b3;
- int d1, d2;
-
- switch (modulus)
- {
- case 0: /* nothing left to do */
- break;
- case 1:
- d1 = data[off + dataLength] & 0xff;
- b1 = (d1 >>> 2) & 0x3f;
- b2 = (d1 << 4) & 0x3f;
-
- out.write(encodingTable[b1]);
- out.write(encodingTable[b2]);
- out.write(padding);
- out.write(padding);
- break;
- case 2:
- d1 = data[off + dataLength] & 0xff;
- d2 = data[off + dataLength + 1] & 0xff;
-
- b1 = (d1 >>> 2) & 0x3f;
- b2 = ((d1 << 4) | (d2 >>> 4)) & 0x3f;
- b3 = (d2 << 2) & 0x3f;
-
- out.write(encodingTable[b1]);
- out.write(encodingTable[b2]);
- out.write(encodingTable[b3]);
- out.write(padding);
- break;
- }
-
- return (dataLength / 3) * 4 + ((modulus == 0) ? 0 : 4);
- }
-
- private boolean ignore(
- char c)
- {
- return (c == '\n' || c =='\r' || c == '\t' || c == ' ');
- }
-
- /**
- * decode the base 64 encoded byte data writing it to the given output stream,
- * whitespace characters will be ignored.
- *
- * @return the number of bytes produced.
- */
- public int decode(
- byte[] data,
- int off,
- int length,
- OutputStream out)
- throws IOException
- {
- byte b1, b2, b3, b4;
- int outLen = 0;
-
- int end = off + length;
-
- while (end > off)
- {
- if (!ignore((char)data[end - 1]))
- {
- break;
- }
-
- end--;
- }
-
- int i = off;
- int finish = end - 4;
-
- i = nextI(data, i, finish);
-
- while (i < finish)
- {
- b1 = decodingTable[data[i++]];
-
- i = nextI(data, i, finish);
-
- b2 = decodingTable[data[i++]];
-
- i = nextI(data, i, finish);
-
- b3 = decodingTable[data[i++]];
-
- i = nextI(data, i, finish);
-
- b4 = decodingTable[data[i++]];
-
- if ((b1 | b2 | b3 | b4) < 0)
- {
- throw new IOException("invalid characters encountered in base64 data");
- }
-
- out.write((b1 << 2) | (b2 >> 4));
- out.write((b2 << 4) | (b3 >> 2));
- out.write((b3 << 6) | b4);
-
- outLen += 3;
-
- i = nextI(data, i, finish);
- }
-
- outLen += decodeLastBlock(out, (char)data[end - 4], (char)data[end - 3], (char)data[end - 2], (char)data[end - 1]);
-
- return outLen;
- }
-
- private int nextI(byte[] data, int i, int finish)
- {
- while ((i < finish) && ignore((char)data[i]))
- {
- i++;
- }
- return i;
- }
-
- /**
- * decode the base 64 encoded String data writing it to the given output stream,
- * whitespace characters will be ignored.
- *
- * @return the number of bytes produced.
- */
- public int decode(
- String data,
- OutputStream out)
- throws IOException
- {
- byte b1, b2, b3, b4;
- int length = 0;
-
- int end = data.length();
-
- while (end > 0)
- {
- if (!ignore(data.charAt(end - 1)))
- {
- break;
- }
-
- end--;
- }
-
- int i = 0;
- int finish = end - 4;
-
- i = nextI(data, i, finish);
-
- while (i < finish)
- {
- b1 = decodingTable[data.charAt(i++)];
-
- i = nextI(data, i, finish);
-
- b2 = decodingTable[data.charAt(i++)];
-
- i = nextI(data, i, finish);
-
- b3 = decodingTable[data.charAt(i++)];
-
- i = nextI(data, i, finish);
-
- b4 = decodingTable[data.charAt(i++)];
-
- if ((b1 | b2 | b3 | b4) < 0)
- {
- throw new IOException("invalid characters encountered in base64 data");
- }
-
- out.write((b1 << 2) | (b2 >> 4));
- out.write((b2 << 4) | (b3 >> 2));
- out.write((b3 << 6) | b4);
-
- length += 3;
-
- i = nextI(data, i, finish);
- }
-
- length += decodeLastBlock(out, data.charAt(end - 4), data.charAt(end - 3), data.charAt(end - 2), data.charAt(end - 1));
-
- return length;
- }
-
- private int decodeLastBlock(OutputStream out, char c1, char c2, char c3, char c4)
- throws IOException
- {
- byte b1, b2, b3, b4;
-
- if (c3 == padding)
- {
- b1 = decodingTable[c1];
- b2 = decodingTable[c2];
-
- if ((b1 | b2) < 0)
- {
- throw new IOException("invalid characters encountered at end of base64 data");
- }
-
- out.write((b1 << 2) | (b2 >> 4));
-
- return 1;
- }
- else if (c4 == padding)
- {
- b1 = decodingTable[c1];
- b2 = decodingTable[c2];
- b3 = decodingTable[c3];
-
- if ((b1 | b2 | b3) < 0)
- {
- throw new IOException("invalid characters encountered at end of base64 data");
- }
-
- out.write((b1 << 2) | (b2 >> 4));
- out.write((b2 << 4) | (b3 >> 2));
-
- return 2;
- }
- else
- {
- b1 = decodingTable[c1];
- b2 = decodingTable[c2];
- b3 = decodingTable[c3];
- b4 = decodingTable[c4];
-
- if ((b1 | b2 | b3 | b4) < 0)
- {
- throw new IOException("invalid characters encountered at end of base64 data");
- }
-
- out.write((b1 << 2) | (b2 >> 4));
- out.write((b2 << 4) | (b3 >> 2));
- out.write((b3 << 6) | b4);
-
- return 3;
- }
- }
-
- private int nextI(String data, int i, int finish)
- {
- while ((i < finish) && ignore(data.charAt(i)))
- {
- i++;
- }
- return i;
- }
-}
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