Fix error checking.

- Newer object style not available in older platforms. - Using message regex style.

Author: davidlehn

tests/unit/rsa.js

@@ -829,9 +829,8 @@ var UTIL = require('../../lib/util');
 
  ASSERT.throws(function() {
  publicKey.verify(md.digest().getBytes(), S);
- }, {
- message: 'Unparsed DER bytes remain after ASN.1 parsing.'
- });
+ },
+ /^Error: Unparsed DER bytes remain after ASN.1 parsing.$/);
  }
 
  function _checkBadDigestInfo(publicKey, S, skipTailingGarbage) {
@@ -842,9 +841,8 @@ var UTIL = require('../../lib/util');
  publicKey.verify(md.digest().getBytes(), S, undefined, {
  _parseAllDigestBytes: !skipTailingGarbage
  });
- }, {
- message: 'ASN.1 object does not contain a valid RSASSA-PKCS1-v1_5 DigestInfo value.'
- });
+ },
+ /^Error: ASN.1 object does not contain a valid RSASSA-PKCS1-v1_5 DigestInfo value.$/);
  }
 
  it('should check DigestInfo structure', function() {