/**
 * Supported cryptographic key types
 */
export type KeyType = "rsa" | "ed25519" | "x25519" | "secp256k1" | "wireguard";
/**
 * Key pair interface for all cryptographic key types
 */
export interface KeyPair {
    privateKey: string;
    publicKey: string;
    type: KeyType;
}
/**
 * Key encoding formats
 */
export type KeyFormat = "pem" | "hex" | "base64";
/**
 * Generate a cryptographic key pair
 * @param type The type of key to generate
 * @param options Optional configuration for key generation
 * @returns A key pair object containing the private and public keys
 * @throws Error if the key type is unsupported
 */
export declare function generateKeyPair(type: KeyType, options?: {
    format?: KeyFormat;
}): KeyPair;
/**
 * Extract the public key from a private key
 * @param privateKey The private key in PEM or hex format
 * @returns The corresponding public key in the same format, or null if extraction fails
 */
export declare function derivePublicKey(privateKey: string): string | null;
/**
 * Compute a short identifier from a public key
 * @param publicKey The public key in PEM format
 * @returns A 16-character hexadecimal identifier
 */
export declare function getShortId(publicKey: string): string;
/**
 * Compute a fingerprint from a public key
 * @param publicKey The public key in PEM format
 * @returns A 64-character hexadecimal fingerprint
 */
export declare function getFingerprint(publicKey: string): string;
/**
 * Key format conversion utilities
 */
/**
 * Convert PEM key to hex format
 * @param pemKey PEM formatted key
 * @returns Hex string or null if conversion fails
 */
export declare function pemToHex(pemKey: string): string | null;
/**
 * Convert PEM private key to hex format
 * @param pemKey The PEM-encoded private key
 * @returns Hex string or null if conversion fails
 */
export declare function pemPrivateKeyToHex(pemKey: string): string | null;
/**
 * Convert hex key to PEM format
 * @param hexKey Hex string key
 * @param keyType Key type for proper PEM formatting
 * @returns PEM formatted key or null if conversion fails
 */
export declare function hexToPem(hexKey: string, keyType: KeyType): string | null;
/**
 * Convert base64 key to hex format
 * @param base64Key Base64 encoded key
 * @returns Hex string or null if conversion fails
 */
export declare function base64ToHex(base64Key: string): string | null;
/**
 * Convert hex key to base64 format
 * @param hexKey Hex string key
 * @returns Base64 encoded key or null if conversion fails
 */
export declare function hexToBase64(hexKey: string): string | null;
/**
 * Detect key format
 * @param key Key in any format
 * @returns Detected format or null if unknown
 */
export declare function detectKeyFormat(key: string): KeyFormat | null;
/**
 * Convert key to hex format regardless of input format
 * @param key Key in any format
 * @param keyType Key type (needed for PEM conversion)
 * @returns Hex string or null if conversion fails
 */
export declare function toHex(key: string, keyType?: KeyType): string | null;
/**
 * Convert Ed25519 private key from hex to PEM format
 * @param hexKey The hex-encoded private key (64 bytes: 32 private + 32 public)
 * @returns PEM formatted private key or null if conversion fails
 */
export declare function hexPrivateKeyToPem(hexKey: string): string | null;