/// <reference types="node" />
export declare enum CaseSensitivityBasic {
    sensitive = "Case Sensitivity",
    insensitive = "No Case Sensitivity"
}
export declare enum CharacterEncoding {
    ascii = "ascii",
    base64 = "base64",
    base64Url = "base64url",
    binary = "binary",
    hex = "hex",
    latin1 = "latin1",
    utf16 = "utf16le",
    utf8 = "utf8"
}
export declare enum CharacterEncodingBasic {
    ascii = "ASCII",
    base64 = "Base64",
    base64Url = "Base64 URL",
    binary = "Binary",
    hex = "Hexadecimal",
    latin1 = "Latin1",
    utf16 = "UTF16-le",
    utf8 = "UTF-8"
}
export declare enum HashAlgorithm {
    md5 = "md5",
    sha1 = "sha1",
    sha2224 = "sha224",
    sha2256 = "sha256",
    sha2384 = "sha384",
    sha2512 = "sha512",
    sha3224 = "sha3-224",
    sha3256 = "sha3-256",
    sha3384 = "sha3-384",
    sha3512 = "sha3-512"
}
export declare enum HashAlgorithmBasic {
    md5 = "MD5",
    sha1 = "SHA-1",
    sha2224 = "SHA-2 224",
    sha2256 = "SHA-2 256",
    sha2384 = "SHA-2 384",
    sha2512 = "SHA-2 512",
    sha3224 = "SHA-3 224",
    sha3256 = "SHA-3 256",
    sha3384 = "SHA-3 384",
    sha3512 = "SHA-3 512"
}
/**
 * Convert the string representation of a character encoding to BufferEncoding.
 * @param encoding
 */
export declare function normalizeCharacterEncoding<E extends `${CharacterEncoding}`, EB extends `${CharacterEncodingBasic}`>(encoding?: E | EB): BufferEncoding;
/**
 * Converts a `CaseSensitivity` reference to the appropriate regex flag ('i' for case insensitivity, empty string otherwise).
 */
export declare function caseSensitivityToRegexFlag<C extends `${CaseSensitivityBasic}`>(caseSensitivity?: CaseSensitivityBasic | C): string;
/**
 * Escapes all characters in a string that have a special meaning in regular expressions.
 */
export declare function escapeSpecialRegexCharacters(source: string): string;