@technobuddha > library > Binary > Hash

Class: Sha256

Defined in: sha256.ts:109

Secure Hash Algorithm, SHA2 SHA-256

Example

const sha256 = new Sha256();
sha256.update('hello world', 'utf8');
sha256.digest('hex');
// 'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9'

const sha256 = new Sha256();
sha256.update(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64]));
sha256.digest('hex');
// 'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9'

Extends

• ShaBase

Constructors

Constructor

new Sha256(): Sha256;

Defined in: src/sha256.ts:127

Creates a new SHA-256 hash instance and initializes its internal state.

Returns

Sha256

Remarks

The internal state variables are set to the initial SHA-256 constants as specified in FIPS PUB 180-4. Use update to process data and digest to retrieve the hash.

Overrides

ShaBase.constructor

Methods

digest()

Call Signature

digest(): Uint8Array;

Defined in: src/sha-base.ts:77

Finalizes the hash computation and returns the resulting hash digest. This method performs any necessary padding and processes the final block of data according to the hash algorithm's specification.

Returns

Uint8Array

The hash digest

Inherited from

ShaBase.digest

Call Signature

digest(encoding: BinaryEncoding): string;

Defined in: src/sha-base.ts:78

Finalizes the hash computation and returns the resulting hash digest. This method performs any necessary padding and processes the final block of data according to the hash algorithm's specification.

Parameters

Parameter	Type	Description
encoding	BinaryEncoding	Optional. The encoding to use for the output digest (e.g., 'hex', 'base64').

Returns

string

An encoded string, depending on the encoding parameter.

Inherited from

ShaBase.digest

---

update()

Call Signature

update(data: BinaryObject | ArrayLike<number>): this;

Defined in: src/sha-base.ts:119

Updates the hash with the given binary data.

Parameters

Parameter	Type	Description
data	BinaryObject | ArrayLike<number>	The data to update the hash with, as a BinaryObject.

Returns

this

The hash instance for method chaining.

Inherited from

ShaBase.update

Call Signature

update(data: string, encoding?: TextEncoding): this;

Defined in: src/sha-base.ts:120

Updates the hash with the given string data.

Parameters

Parameter	Type	Description
data	string	The string data to update the hash with.
encoding?	TextEncoding	Optional text encoding of the input string (e.g., 'utf8').

Returns

this

The hash instance for method chaining.

Inherited from

ShaBase.update