Hawkynt

SHA-256

SHA-256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function from the SHA-2 family designed by NIST. Produces 256-bit (32-byte) hash values from arbitrary input data.

Properties

Property	Value
Category	Hash Functions
Sub-category	SHA-2 Family
Security status	🛡️ Secure
Complexity	Intermediate
Inventor	NIST
Year	2001
Origin	🇺🇸 United States
Source	algorithms/hash/sha256.js

Parameters

Parameter	Supported values
Output sizes	32 bytes (256 bits)

Security

Status: 🛡️ Secure

No vulnerabilities are recorded for this implementation.

Documentation

• NIST FIPS 180-4: Secure Hash Standard
• RFC 6234: US Secure Hash Algorithms
• Wikipedia: SHA-2

References

• OpenSSL Implementation
• NIST CAVP Test Vectors

Test vectors

3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — NIST Test Vector - Empty String

Field	Value
input	(empty)
expected	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Vector 2 — NIST Test Vector - ‘abc’

Field	Value
input	616263
expected	ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

Vector 3 — NIST Test Vector - Long String

Field	Value
input	61626364626364656364656664656667 65666768666768696768696a68696a6b 696a6b6c6a6b6c6d6b6c6d6e6c6d6e6f 6d6e6f706e6f7071
expected	248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1

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