http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.mime.encoding.Base64InputStream extends java.io.InputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.mime.encoding.Base64InputStream
  super_class: java.io.InputStream
{
  private static final byte[] decodingTable;
    descriptor: [B
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  java.io.InputStream in;
    descriptor: Ljava/io/InputStream;
    flags: (0x0000) 

  int[] outBuf;
    descriptor: [I
    flags: (0x0000) 

  int bufPtr;
    descriptor: I
    flags: (0x0000) 

  boolean isEndOfStream;
    descriptor: Z
    flags: (0x0000) 

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=1, args_size=0
         0: .line 20
            sipush 128
            newarray 8
            putstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
         1: .line 22
            bipush 65
            istore 0 /* i */
        start local 0 // int i
         2: goto 5
         3: .line 24
      StackMap locals: int
      StackMap stack:
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 0 /* i */
            iload 0 /* i */
            bipush 65
            isub
            i2b
            bastore
         4: .line 22
            iinc 0 /* i */ 1
      StackMap locals:
      StackMap stack:
         5: iload 0 /* i */
            bipush 90
            if_icmple 3
        end local 0 // int i
         6: .line 27
            bipush 97
            istore 0 /* i */
        start local 0 // int i
         7: goto 10
         8: .line 29
      StackMap locals:
      StackMap stack:
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 0 /* i */
            iload 0 /* i */
            bipush 97
            isub
            bipush 26
            iadd
            i2b
            bastore
         9: .line 27
            iinc 0 /* i */ 1
      StackMap locals:
      StackMap stack:
        10: iload 0 /* i */
            bipush 122
            if_icmple 8
        end local 0 // int i
        11: .line 32
            bipush 48
            istore 0 /* i */
        start local 0 // int i
        12: goto 15
        13: .line 34
      StackMap locals:
      StackMap stack:
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 0 /* i */
            iload 0 /* i */
            bipush 48
            isub
            bipush 52
            iadd
            i2b
            bastore
        14: .line 32
            iinc 0 /* i */ 1
      StackMap locals:
      StackMap stack:
        15: iload 0 /* i */
            bipush 57
            if_icmple 13
        end local 0 // int i
        16: .line 37
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            bipush 43
            bipush 62
            bastore
        17: .line 38
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            bipush 47
            bipush 63
            bastore
        18: .line 39
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            2    6     0     i  I
            7   11     0     i  I
           12   16     0     i  I

  private int decode(int, int, int, int, int[]);
    descriptor: (IIII[I)I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=10, args_size=6
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
        start local 1 // int in0
        start local 2 // int in1
        start local 3 // int in2
        start local 4 // int in3
        start local 5 // int[] out
         0: .line 56
            iload 4 /* in3 */
            ifge 2
         1: .line 58
            new java.io.EOFException
            dup
            ldc "unexpected end of file in armored stream."
            invokespecial java.io.EOFException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 61
      StackMap locals:
      StackMap stack:
            iload 3 /* in2 */
            bipush 61
            if_icmpne 7
         3: .line 63
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 1 /* in0 */
            baload
            sipush 255
            iand
            istore 6 /* b1 */
        start local 6 // int b1
         4: .line 64
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 2 /* in1 */
            baload
            sipush 255
            iand
            istore 7 /* b2 */
        start local 7 // int b2
         5: .line 66
            aload 5 /* out */
            iconst_2
            iload 6 /* b1 */
            iconst_2
            ishl
            iload 7 /* b2 */
            iconst_4
            ishr
            ior
            sipush 255
            iand
            iastore
         6: .line 68
            iconst_2
            ireturn
        end local 7 // int b2
        end local 6 // int b1
         7: .line 70
      StackMap locals:
      StackMap stack:
            iload 4 /* in3 */
            bipush 61
            if_icmpne 14
         8: .line 72
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 1 /* in0 */
            baload
            istore 6 /* b1 */
        start local 6 // int b1
         9: .line 73
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 2 /* in1 */
            baload
            istore 7 /* b2 */
        start local 7 // int b2
        10: .line 74
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 3 /* in2 */
            baload
            istore 8 /* b3 */
        start local 8 // int b3
        11: .line 76
            aload 5 /* out */
            iconst_1
            iload 6 /* b1 */
            iconst_2
            ishl
            iload 7 /* b2 */
            iconst_4
            ishr
            ior
            sipush 255
            iand
            iastore
        12: .line 77
            aload 5 /* out */
            iconst_2
            iload 7 /* b2 */
            iconst_4
            ishl
            iload 8 /* b3 */
            iconst_2
            ishr
            ior
            sipush 255
            iand
            iastore
        13: .line 79
            iconst_1
            ireturn
        end local 8 // int b3
        end local 7 // int b2
        end local 6 // int b1
        14: .line 83
      StackMap locals:
      StackMap stack:
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 1 /* in0 */
            baload
            istore 6 /* b1 */
        start local 6 // int b1
        15: .line 84
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 2 /* in1 */
            baload
            istore 7 /* b2 */
        start local 7 // int b2
        16: .line 85
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 3 /* in2 */
            baload
            istore 8 /* b3 */
        start local 8 // int b3
        17: .line 86
            getstatic org.bouncycastle.mime.encoding.Base64InputStream.decodingTable:[B
            iload 4 /* in3 */
            baload
            istore 9 /* b4 */
        start local 9 // int b4
        18: .line 88
            aload 5 /* out */
            iconst_0
            iload 6 /* b1 */
            iconst_2
            ishl
            iload 7 /* b2 */
            iconst_4
            ishr
            ior
            sipush 255
            iand
            iastore
        19: .line 89
            aload 5 /* out */
            iconst_1
            iload 7 /* b2 */
            iconst_4
            ishl
            iload 8 /* b3 */
            iconst_2
            ishr
            ior
            sipush 255
            iand
            iastore
        20: .line 90
            aload 5 /* out */
            iconst_2
            iload 8 /* b3 */
            bipush 6
            ishl
            iload 9 /* b4 */
            ior
            sipush 255
            iand
            iastore
        21: .line 92
            iconst_0
            ireturn
        end local 9 // int b4
        end local 8 // int b3
        end local 7 // int b2
        end local 6 // int b1
        end local 5 // int[] out
        end local 4 // int in3
        end local 3 // int in2
        end local 2 // int in1
        end local 1 // int in0
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   22     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
            0   22     1   in0  I
            0   22     2   in1  I
            0   22     3   in2  I
            0   22     4   in3  I
            0   22     5   out  [I
            4    7     6    b1  I
            9   14     6    b1  I
           15   22     6    b1  I
            5    7     7    b2  I
           10   14     7    b2  I
           16   22     7    b2  I
           11   14     8    b3  I
           17   22     8    b3  I
           18   22     9    b4  I
    Exceptions:
      throws java.io.EOFException
    MethodParameters:
      Name  Flags
      in0   
      in1   
      in2   
      in3   
      out   

  public void <init>(java.io.InputStream);
    descriptor: (Ljava/io/InputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
        start local 1 // java.io.InputStream in
         0: .line 107
            aload 0 /* this */
            invokespecial java.io.InputStream.<init>:()V
         1: .line 97
            aload 0 /* this */
            iconst_3
            newarray 10
            putfield org.bouncycastle.mime.encoding.Base64InputStream.outBuf:[I
         2: .line 98
            aload 0 /* this */
            iconst_3
            putfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
         3: .line 110
            aload 0 /* this */
            aload 1 /* in */
            putfield org.bouncycastle.mime.encoding.Base64InputStream.in:Ljava/io/InputStream;
         4: .line 111
            return
        end local 1 // java.io.InputStream in
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
            0    5     1    in  Ljava/io/InputStream;
    MethodParameters:
      Name  Flags
      in    

  public int available();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
         0: .line 116
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.in:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.available:()I
            ireturn
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
    Exceptions:
      throws java.io.IOException

  private int readIgnoreSpace();
    descriptor: ()I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
         0: .line 122
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.in:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.read:()I
            istore 1 /* c */
        start local 1 // int c
         1: .line 124
            goto 3
         2: .line 126
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.in:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.read:()I
            istore 1 /* c */
         3: .line 124
      StackMap locals:
      StackMap stack:
            iload 1 /* c */
            bipush 32
            if_icmpeq 2
            iload 1 /* c */
            bipush 9
            if_icmpeq 2
         4: .line 129
            iload 1 /* c */
            ireturn
        end local 1 // int c
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
            1    5     1     c  I
    Exceptions:
      throws java.io.IOException

  public int read();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=2, args_size=1
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
         0: .line 137
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
            iconst_2
            if_icmple 17
         1: .line 139
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            istore 1 /* c */
        start local 1 // int c
         2: .line 141
            iload 1 /* c */
            bipush 13
            if_icmpeq 3
            iload 1 /* c */
            bipush 10
            if_icmpne 12
         3: .line 143
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            istore 1 /* c */
         4: .line 145
            goto 6
         5: .line 147
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            istore 1 /* c */
         6: .line 145
      StackMap locals:
      StackMap stack:
            iload 1 /* c */
            bipush 10
            if_icmpeq 5
            iload 1 /* c */
            bipush 13
            if_icmpeq 5
         7: .line 150
            iload 1 /* c */
            ifge 10
         8: .line 152
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.mime.encoding.Base64InputStream.isEndOfStream:Z
         9: .line 153
            iconst_m1
            ireturn
        10: .line 156
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 0 /* this */
            iload 1 /* c */
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.outBuf:[I
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.decode:(IIII[I)I
            putfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
        11: .line 157
            goto 17
        12: .line 160
      StackMap locals:
      StackMap stack:
            iload 1 /* c */
            iflt 15
        13: .line 162
            aload 0 /* this */
            aload 0 /* this */
            iload 1 /* c */
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.readIgnoreSpace:()I
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.outBuf:[I
            invokevirtual org.bouncycastle.mime.encoding.Base64InputStream.decode:(IIII[I)I
            putfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
        14: .line 163
            goto 17
        15: .line 166
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.mime.encoding.Base64InputStream.isEndOfStream:Z
        16: .line 167
            iconst_m1
            ireturn
        end local 1 // int c
        17: .line 172
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.outBuf:[I
            aload 0 /* this */
            dup
            getfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
            dup_x1
            iconst_1
            iadd
            putfield org.bouncycastle.mime.encoding.Base64InputStream.bufPtr:I
            iaload
            istore 1 /* c */
        start local 1 // int c
        18: .line 174
            iload 1 /* c */
            ireturn
        end local 1 // int c
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   19     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
            2   17     1     c  I
           18   19     1     c  I
    Exceptions:
      throws java.io.IOException

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
         0: .line 180
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64InputStream.in:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.close:()V
         1: .line 181
            return
        end local 0 // org.bouncycastle.mime.encoding.Base64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/mime/encoding/Base64InputStream;
    Exceptions:
      throws java.io.IOException
}
SourceFile: "Base64InputStream.java"