Package com.southernstorm.noise.crypto
Class ChaChaCore
- java.lang.Object
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- com.southernstorm.noise.crypto.ChaChaCore
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public final class ChaChaCore extends Object
Implementation of the ChaCha20 core hash transformation.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static void
hash(int[] output, int[] input)
Hashes an input block with ChaCha20.static void
initIV(int[] output, long iv)
Initializes the 64-bit initialization vector in a ChaCha20 block.static void
initIV(int[] output, long iv, long counter)
Initializes the 64-bit initialization vector and counter in a ChaCha20 block.static void
initKey256(int[] output, byte[] key, int offset)
Initializes a ChaCha20 block with a 256-bit key.
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Method Detail
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hash
public static void hash(int[] output, int[] input)
Hashes an input block with ChaCha20.- Parameters:
output
- The output block, which must contain at least 16 elements and must not overlap with the input.input
- The input block, which must contain at least 16 elements.
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initKey256
public static void initKey256(int[] output, byte[] key, int offset)
Initializes a ChaCha20 block with a 256-bit key.- Parameters:
output
- The output block, which must consist of at least 16 words.key
- The buffer containing the key.offset
- Offset of the key in the buffer.
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initIV
public static void initIV(int[] output, long iv)
Initializes the 64-bit initialization vector in a ChaCha20 block.- Parameters:
output
- The output block, which must consist of at least 16 words and must have been initialized by initKey256() or initKey128().iv
- The 64-bit initialization vector value. The counter portion of the output block is set to zero.
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initIV
public static void initIV(int[] output, long iv, long counter)
Initializes the 64-bit initialization vector and counter in a ChaCha20 block.- Parameters:
output
- The output block, which must consist of at least 16 words and must have been initialized by initKey256() or initKey128().iv
- The 64-bit initialization vector value.counter
- The 64-bit counter value.
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