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## org.bouncycastle.tsp
Class TSPUtil

    java.lang.Object
      org.bouncycastle.tsp.TSPUtil

    public class TSPUtil

extends java.lang.Object

Constructor Summary
`TSPUtil()`

Method Summary
`static java.util.Collection` | `getSignatureTimestamps(org.bouncycastle.cms.SignerInformation signerInfo, java.security.Provider provider)` Fetches the signature time-stamp attributes from a SignerInformation object.
`static void` | `validateCertificate(java.security.cert.X509Certificate cert)` Validate the passed in certificate as being of the correct type to be used for time stamping.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TSPUtil

    public TSPUtil()

Method Detail

### getSignatureTimestamps

    public static java.util.Collection getSignatureTimestamps(org.bouncycastle.cms.SignerInformation signerInfo,
                                                              java.security.Provider provider)
                                                       throws TSPValidationException

  Fetches the signature time-stamp attributes from a SignerInformation object. Checks that the MessageImprint for each time-stamp matches the signature field. (see RFC 3161 Appendix A).

  Parameters:
    `signerInfo` - a SignerInformation to search for time-stamps
    `provider` - an optional provider to use to create MessageDigest instances
  Returns:
    a collection of TimeStampToken objects
  Throws:
    `TSPValidationException`

### validateCertificate

    public static void validateCertificate(java.security.cert.X509Certificate cert)
                                    throws TSPValidationException

  Validate the passed in certificate as being of the correct type to be used for time stamping. To be valid it must have an ExtendedKeyUsage extension which has a key purpose identifier of id-kp-timeStamping.

  Parameters:
    `cert` - the certificate of interest.
  Throws:
    `TSPValidationException` - if the certicate fails on one of the check points.

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