Base32 (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.util.encoders

## Class Base32

- java.lang.Object
- - org.bouncycastle.util.encoders.Base32

-     public class Base32
      extends java.lang.Object

  Utility class for converting Base32 data to bytes and back again.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Base32()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static byte[]` | `decode(byte[] data)` decode the base 32 encoded input data.
    `static int` | `decode(byte[] base32Data, int start, int length, java.io.OutputStream out)` Decode to an output stream;
    `static byte[]` | `decode(java.lang.String data)` decode the base 32 encoded String data - whitespace will be ignored.
    `static int` | `decode(java.lang.String data, java.io.OutputStream out)` decode the base 32 encoded String data writing it to the given output stream, whitespace characters will be ignored.
    `static byte[]` | `encode(byte[] data)` encode the input data producing a base 32 encoded byte array.
    `static byte[]` | `encode(byte[] data, int off, int length)` encode the input data producing a base 32 encoded byte array.
    `static int` | `encode(byte[] data, int off, int length, java.io.OutputStream out)` Encode the byte data to base 32 writing it to the given output stream.
    `static int` | `encode(byte[] data, java.io.OutputStream out)` Encode the byte data to base 32 writing it to the given output stream.
    `static java.lang.String` | `toBase32String(byte[] data)`
    `static java.lang.String` | `toBase32String(byte[] data, int off, int length)`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### Base32

          public Base32()

  - ### Method Detail

    - #### toBase32String

          public static java.lang.String toBase32String(byte[] data)

    - #### toBase32String

          public static java.lang.String toBase32String(byte[] data,
                                                        int off,
                                                        int length)

    - #### encode

          public static byte[] encode(byte[] data)

      encode the input data producing a base 32 encoded byte array.
      Returns:
        a byte array containing the base 32 encoded data.

    - #### encode

          public static byte[] encode(byte[] data,
                                      int off,
                                      int length)

      encode the input data producing a base 32 encoded byte array.
      Returns:
        a byte array containing the base 32 encoded data.

    - #### encode

          public static int encode(byte[] data,
                                   java.io.OutputStream out)
                            throws java.io.IOException

      Encode the byte data to base 32 writing it to the given output stream.
      Returns:
        the number of bytes produced.
      Throws:
        `java.io.IOException`

    - #### encode

          public static int encode(byte[] data,
                                   int off,
                                   int length,
                                   java.io.OutputStream out)
                            throws java.io.IOException

      Encode the byte data to base 32 writing it to the given output stream.
      Returns:
        the number of bytes produced.
      Throws:
        `java.io.IOException`

    - #### decode

          public static byte[] decode(byte[] data)

      decode the base 32 encoded input data. It is assumed the input data is valid.
      Returns:
        a byte array representing the decoded data.

    - #### decode

          public static byte[] decode(java.lang.String data)

      decode the base 32 encoded String data - whitespace will be ignored.
      Returns:
        a byte array representing the decoded data.

    - #### decode

          public static int decode(java.lang.String data,
                                   java.io.OutputStream out)
                            throws java.io.IOException

      decode the base 32 encoded String data writing it to the given output stream, whitespace characters will be ignored.
      Returns:
        the number of bytes produced.
      Throws:
        `java.io.IOException`

    - #### decode

          public static int decode(byte[] base32Data,
                                   int start,
                                   int length,
                                   java.io.OutputStream out)

      Decode to an output stream;
      Parameters:
        `base32Data` - The source data.
        `start` - Start position.
        `length` - the length.
        `out` - The output stream to write to.