initKdf

Construct a new Blake3 for the key derivation function. The context string should be hardcoded, globally unique, and application-specific.

Function parameters

Parameters

context:[]const u8
options:KdfOptions

An incremental hasher that can accept any number of writes.

Types

Blake3: An incremental hasher that can accept any number of writes.

Source

Implementation

pub fn initKdf(context: []const u8, options: KdfOptions) Blake3 {
    _ = options;
    var context_hasher = Blake3.init_internal(IV, DERIVE_KEY_CONTEXT);
    context_hasher.update(context);
    var context_key: [KEY_LEN]u8 = undefined;
    context_hasher.final(context_key[0..]);
    const context_key_words = wordsFromLittleEndianBytes(8, context_key);
    return Blake3.init_internal(context_key_words, DERIVE_KEY_MATERIAL);
}