Keccak
const Keccak: {
"ethereum": Bytes;
"nistSha3": Bytes;
"preNist": Bytes;
};
Type declaration
ethereum()
Ethereum-Compatible Keccak-256 Hash Function. This is a specialized variant of Keccak.preNist configured for a 256-bit output length.
Primarily used in Ethereum for hashing transactions, messages, and other types of payloads.
The function accepts Bytes as the input message, which is a type that represents a static-length list of byte-sized field elements (range-checked using Gadgets.rangeCheck8).
Alternatively, you can pass plain number[] of Uint8Array to perform a hash outside provable code.
Produces an output of Bytes of length 32. Both input and output bytes are big-endian.
Parameters
• message: FlexibleBytes
Big-endian Bytes representing the message to hash.
let preimage = Bytes.fromString("hello world");
let digest = Keccak.ethereum(preimage);
Returns
Bytes
nistSha3()
Implementation of NIST SHA-3 Hash Function. Supports output lengths of 256, 384, or 512 bits.
Applies the SHA-3 hash function to a list of big-endian byte-sized Field elements, flexible to handle varying output lengths (256, 384, 512 bits) as specified.
The function accepts Bytes as the input message, which is a type that represents a static-length list of byte-sized field elements (range-checked using Gadgets.rangeCheck8).
Alternatively, you can pass plain number[] of Uint8Array to perform a hash outside provable code.
Produces an output of Bytes that conforms to the chosen bit length. Both input and output bytes are big-endian.
Parameters
• len: 256 | 384 | 512
Desired output length in bits. Valid options: 256, 384, 512.
• message: FlexibleBytes
Big-endian Bytes representing the message to hash.
let preimage = Bytes.fromString("hello world");
let digest256 = Keccak.nistSha3(256, preimage);
let digest384 = Keccak.nistSha3(384, preimage);
let digest512 = Keccak.nistSha3(512, preimage);
Returns
Bytes
preNist()
Implementation of pre-NIST Keccak hash function. Supports output lengths of 256, 384, or 512 bits.
Keccak won the SHA-3 competition and was slightly altered before being standardized as SHA-3 by NIST in 2015.
This variant was used in Ethereum before the NIST standardization, by specifying len as 256 bits you can obtain the same hash function as used by Ethereum Keccak.ethereum.
The function applies the pre-NIST Keccak hash function to a list of byte-sized Field elements and is flexible to handle varying output lengths (256, 384, 512 bits) as specified.
Keccak.preNist accepts Bytes as the input message, which is a type that represents a static-length list of byte-sized field elements (range-checked using Gadgets.rangeCheck8).
Alternatively, you can pass plain number[] of Uint8Array to perform a hash outside provable code.
Produces an output of Bytes that conforms to the chosen bit length. Both input and output bytes are big-endian.
Parameters
• len: 256 | 384 | 512
Desired output length in bits. Valid options: 256, 384, 512.
• message: FlexibleBytes
Big-endian Bytes representing the message to hash.
let preimage = Bytes.fromString("hello world");
let digest256 = Keccak.preNist(256, preimage);
let digest384 = Keccak.preNist(384, preimage);
let digest512= Keccak.preNist(512, preimage);
Returns
Bytes