HKDF.expand
ubyte[] expand(const(ubyte)[] prk, const(ubyte)[] info, size_t length)HKDF-Expand Step.
Expands a pseudorandom key (PRK) into output keying material (OKM).
Parameters
prk | The pseudorandom key (usually output of extract). Must be at least HashLen bytes (RFC 5869 section 2.3). |
info | Context and application specific information (can be null/empty). |
length | The desired length of the output keying material (OKM). |
Returns
The output keying material (OKM).
Throws
CryptoException if
prk is shorter than HashLen bytes or
length exceeds 255 * HashLen.