Hawkynt

TLS-12-PRF(HMAC(SHA-224))

TLS 1.2 Pseudorandom Function using HMAC-SHA-224. Modern TLS key derivation supporting arbitrary hash functions. Uses P_hash construction with single PRF instead of dual MD5+SHA-1.

Properties

Property	Value
Category	Key Derivation Functions
Sub-category	Key Derivation Function
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	IETF TLS Working Group
Year	2008
Origin	🇺🇸 United States
Source	algorithms/kdf/tls-prf.js

Parameters

Parameter	Supported values
Output sizes	1 byte (8 bits) to 1024 bytes (8192 bits)

Capabilities

Flag	Value
SaltRequired	Yes

Security

Status: 🎓 Educational Only

No vulnerabilities are recorded for this implementation.

Documentation

• RFC 5246 - TLS 1.2 Protocol
• Botan TLS-12-PRF Implementation
• IETF Mail Archive - Test Vectors

References

• OpenSSL TLS1.2 PRF
• RFC 8446 - TLS 1.3

Test vectors

1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — IETF TLS 1.2 SHA-224 Test Vector

Field	Value
salt	f5a3fe6d34e2e28560fdcaf6823f9091
label	74657374206c6162656c
outputSize	88
input	e18828740352b530d69b34c6597dea2e
expected	224d8af3c0453393a9779789d21cf7da 5ee62ae6b617873d489428efc8dd58d1 566e7029e2ca3a5ecd355dc64d4d927e 2fbd78c4233e8604b14749a77a92a70f ddf614bc0df623d798604e4ca5512794 d802a258e82f86cf

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