import crypto from 'crypto';

export function getSigningAlgorithm (shortName: string): string {
  switch(shortName) {
    case 'sha256':
      return 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256';
    case 'sha512':
      return 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha512';
    default:
      return 'http://www.w3.org/2000/09/xmldsig#rsa-sha1';
  }
}

export function getDigestAlgorithm (shortName: string): string {
  switch(shortName) {
    case 'sha256':
      return 'http://www.w3.org/2001/04/xmlenc#sha256';
    case 'sha512':
      return 'http://www.w3.org/2001/04/xmlenc#sha512';
    default:
      return 'http://www.w3.org/2000/09/xmldsig#sha1';
  }
}

export function getSigner (shortName: string): crypto.Signer {
  switch(shortName) {
    case 'sha256':
      return crypto.createSign('RSA-SHA256');
    case 'sha512':
      return crypto.createSign('RSA-SHA512');
    default:
      return crypto.createSign('RSA-SHA1');
  }
}