Vlad Durnea
cffdf8af86
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36 lines
1.9 KiB
TypeScript
36 lines
1.9 KiB
TypeScript
import { type CHash } from './utils.ts';
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/**
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* HKDF-extract from spec. Less important part. `HKDF-Extract(IKM, salt) -> PRK`
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* Arguments position differs from spec (IKM is first one, since it is not optional)
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* @param hash - hash function that would be used (e.g. sha256)
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* @param ikm - input keying material, the initial key
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* @param salt - optional salt value (a non-secret random value)
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*/
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export declare function extract(hash: CHash, ikm: Uint8Array, salt?: Uint8Array): Uint8Array;
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/**
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* HKDF-expand from the spec. The most important part. `HKDF-Expand(PRK, info, L) -> OKM`
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* @param hash - hash function that would be used (e.g. sha256)
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* @param prk - a pseudorandom key of at least HashLen octets (usually, the output from the extract step)
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* @param info - optional context and application specific information (can be a zero-length string)
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* @param length - length of output keying material in bytes
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*/
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export declare function expand(hash: CHash, prk: Uint8Array, info?: Uint8Array, length?: number): Uint8Array;
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/**
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* HKDF (RFC 5869): derive keys from an initial input.
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* Combines hkdf_extract + hkdf_expand in one step
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* @param hash - hash function that would be used (e.g. sha256)
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* @param ikm - input keying material, the initial key
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* @param salt - optional salt value (a non-secret random value)
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* @param info - optional context and application specific information (can be a zero-length string)
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* @param length - length of output keying material in bytes
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* @example
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* import { hkdf } from '@noble/hashes/hkdf';
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* import { sha256 } from '@noble/hashes/sha2';
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* import { randomBytes } from '@noble/hashes/utils';
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* const inputKey = randomBytes(32);
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* const salt = randomBytes(32);
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* const info = 'application-key';
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* const hk1 = hkdf(sha256, inputKey, salt, info, 32);
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*/
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export declare const hkdf: (hash: CHash, ikm: Uint8Array, salt: Uint8Array | undefined, info: Uint8Array | undefined, length: number) => Uint8Array;
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//# sourceMappingURL=hkdf.d.ts.map
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