/**
 * A single parsed SRI (Subresource Integrity) hash, e.g. one
 * `sha512-<base64>` segment of a lockfile `integrity` value.
 */
export interface IntegrityHash {
    algorithm: string;
    digestBase64: string;
}
/**
 * Parses an SRI string (one or more space-separated `algorithm-base64`
 * entries) into its supported hashes, unknown algorithms excluded.
 */
export declare function parseIntegrity(integrity: string): IntegrityHash[];
/**
 * Returns the strongest supported hash of an SRI string, or undefined if
 * none of its entries use a supported algorithm.
 */
export declare function strongestIntegrityHash(integrity: string): IntegrityHash | undefined;
/**
 * Verifies content against an SRI string using its strongest supported
 * hash. Returns false when no supported hash is present.
 */
export declare function verifyIntegrity(content: Buffer, integrity: string): boolean;
/**
 * The hex encoding of an SRI hash's digest. npm's cacache stores content
 * under this encoding, e.g. `content-v2/sha512/<hex[0:2]>/<hex[2:4]>/<hex[4:]>`.
 */
export declare function integrityHashToHex(hash: IntegrityHash): string;