Module kdf/hkdf

source · [−]
Expand description

Code related to HKDF

Functions

source

(algorithm: Omit<EnforcedHkdfParams, "name">, baseKey: HkdfKeyMaterial, length: number): Promise<ArrayBuffer>

Derive a number bits with a given key material

example
const salt = await Random.Salt.generate();
const info = await Random.getValues(6);
const bits = await HKDF.deriveBits(
     { salt, info, hash: "SHA-512" },
     keyMaterial,
     128
);
example
const salt = await Random.Salt.generate();
const info = await Random.getValues(6);
const bits = await keyMaterial.deriveBits(
     { salt, info, hash: "SHA-512" },
     128
);
source

(algorithm: Omit<EnforcedHkdfParams, "name">, baseKey: HkdfKeyMaterial, derivedKeyType: EnforcedHmacKeyGenParams | EnforcedAesKeyGenParams, extractable?: boolean, keyUsages?: KeyUsage[]): Promise<HmacCryptoKey | AesCryptoKeys>

Derive a shared key from HKDF key material

example
const hmacParams: params.EnforcedHmacKeyGenParams = {
     name: Authentication.Alg.Code.HMAC,
     hash: SHA.Alg.Variant.SHA_512,
     length: 512,
};
const salt = await Random.Salt.generate();
const info = await Random.getValues(6);
let key = await HKDF.deriveKey(
     { salt, info, hash: "SHA-512" },
     keyMaterial,
     hmacParams
);
example
const hmacParams: params.EnforcedHmacKeyGenParams = {
     name: Authentication.Alg.Code.HMAC,
     hash: SHA.Alg.Variant.SHA_512,
     length: 512,
};
const salt = await Random.Salt.generate();
const info = await Random.getValues(6);
let key = await keyMaterial.deriveKey(
     { salt, info, hash: "SHA-512" },
     hmacParams
);
source

(format: KeyFormat, key: BufferSource, extractable?: boolean): Promise<HkdfProxiedKeyMaterial>

Generate key material for deriving

example
const keyMaterial = await HKDF.generateKeyMaterial("raw", new TextEncoder().encode("lots_of_entropy"));