/// <reference types="node" />
/// <reference types="node" />
/// <reference types="node" />
import { CipherGCMTypes as crypto_CipherGCMTypes } from 'crypto';
/** data to encrypt (or result of decrypt) */
export declare type Unencrypted = string | NodeJS.ArrayBufferView;
/** Stringified JSON ciphertext (used for private keys) */
export declare type AsymmetricEncryptedDataString = string & AsymmetricEncryptedDataStringBrand;
/** Brand signifiying a valid value - assigned by using toSymEncryptedDataString */
export declare enum AsymmetricEncryptedDataStringBrand {
    _ = ""
}
/** Possible symmetric cypher types */
export declare enum SymmetricCypherType {
    Aes128Ecb = "aes-128-ecb",
    Aes256Ctr = "aes-256-ctr",
    Sha256 = "sha256"
}
export declare type ECDHKeyFormat = 'compressed' | 'uncompressed' | 'hybrid';
export declare type CipherGCMTypes = crypto_CipherGCMTypes | SymmetricCypherType.Aes128Ecb | SymmetricCypherType.Sha256 | SymmetricCypherType.Aes256Ctr;
export declare enum EciesCurveType {
    Secp256k1 = "secp256k1",
    Ed25519 = "ed25519"
}
/** Informational string added to encrypted results - useful when decrypting in determining set of options used
 * e.g. 'chainjs.ethereum.secp256k1.v2' */
export declare enum AsymmetricScheme {
    DEFAULT_SECP256K1_ASYMMETRIC_SCHEME_NAME = "asym.chainjs.secp256k1",
    DEFAULT_ED25519_ASYMMETRIC_SCHEME_NAME = "asym.chainjs.ed25519",
    ALGORAND_ASYMMETRIC_SCHEME_NAME = "asym.chainjs.ed25519.algorand",
    EOS_ASYMMETRIC_SCHEME_NAME = "asym.chainjs.secp256k1.eos",
    ETHEREUM_ASYMMETRIC_SCHEME_NAME = "asym.chainjs.secp256k1.ethereum",
    SECP256K1_TYPE1 = "asym.chainjs.secp256k1.type1",
    ED25519_TYPE1 = "asym.chainjs.ed25519.type1"
}
export declare type EciesOptions = {
    hashCypherType?: SymmetricCypherType;
    macCipherType?: SymmetricCypherType;
    curveType?: EciesCurveType;
    symmetricCypherType?: SymmetricCypherType;
    keyFormat?: ECDHKeyFormat;
    /** Optional Initialization Vector (as Hex string) */
    iv?: string;
    /** Optional message/secret to share in encrypted payload (as Utf8 string) */
    s1?: string;
    /** Optional message/secret to share in encrypted payload (as Utf8 string) */
    s2?: string;
    scheme?: AsymmetricScheme | string;
};
export declare type EciesOptionsAsBuffers = {
    hashCypherType?: SymmetricCypherType;
    macCipherType?: SymmetricCypherType;
    curveType?: EciesCurveType;
    symmetricCypherType?: SymmetricCypherType;
    keyFormat?: ECDHKeyFormat;
    /** Optional Initialization Vector (as Hex string) */
    iv?: Buffer;
    /** Optional message/secret to share in encrypted payload (as Utf8 string) */
    s1?: Buffer;
    /** Optional message/secret to share in encrypted payload (as Utf8 string) */
    s2?: Buffer;
    scheme?: AsymmetricScheme | string;
};
/** Asymmetric encypted data object
 * all values are hex strings */
export declare type AsymmetricEncryptedData = {
    /** 0-based order of encryption - used when 'wrapping' with mulitple asymmetric encryptions in a sequence */
    seq?: number;
    iv: string;
    publicKey: string;
    ephemPublicKey: string;
    ciphertext?: string;
    mac: string;
    scheme?: AsymmetricScheme | string;
};
/** Passed into encryptWithPublicKey & decryptWithPublicKey to allow custom cipherkey & mackey generation */
export declare type MessageKeyGenerator = (sharedSecret?: Buffer | Uint8Array, s1?: Buffer, ephemKeyBuffer?: Buffer) => {
    cipherKey: Buffer;
    macKey: Buffer;
};
/** Passed into encryptWithPublicKey & decryptWithPublicKey to allow custom mac generation */
export declare type MacGenerator = (macKey?: Buffer, s2?: Buffer, cipherText?: Buffer) => Buffer;
/** Custom way to compose an asymmetic encyption payload */
export declare type AsymmetricSchemeGenerator = {
    /** unique name that defines the details of how cipher key and mac key were composed (e.g. compressed or umcompressed public key) */
    scheme: AsymmetricScheme;
    /** function to generate a cipher key in a 'custom' way */
    messageKeyGenerator: MessageKeyGenerator;
    /** function to generate a mac key in a 'custom' way */
    macGenerator: MacGenerator;
};