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# OCSPQuery - Reference Documentation

Class implementing support for the Online Certificate Status Protocol (OCSP)

## Index of Methods

- OCSPQuery() constructor
- add()
- execute()
- post()
- getStatus()
- getStatusString()
- getRevocationTime()
- getRequest()
- getResponse()

## Constants

Type | Name | Description
--- | --- | ---
Number | GOOD | Certificate is valid
Number | UNKNOWN | Certificate is unknown to the responder
Number | REVOKED | Certificate was revoked
Number | KEYCOMPROMISE | Certificate was revoked because the key was compromised
Number | CACOMPROMISE | Certificate was revoked because the CA key was compromised
Number | AFFILIATIONCHANGED | Certificate was revoked because the affiliation changed
Number | SUPERSEDED | Certificate was revoked because a new certificate was issued
Number | CESSATIONOFOPERATION | Certificate was revoked because the CA discontinued operation
Number | CERTIFICATEHOLD | Certificate is on hold
Number | REMOVEFROMCRL | Certificate was revoked and can now be removed form CRL
Number | PRIVILEGEWITHDRAWN | Certificate was revoked because the privileges granted by to the owner were withdrawn
Number | AACOMPROMISE | Certificate was revoked

## Constructor

### Prototype

OCSPQuery(X509 rootCert, X509 issuerCert)

OCSPQuery(X509 issuerCert)

### Description

Create OCSPQuery object that can be used to collect certificates for which the the status can be queried from an OCSP responder.

The URL for the OCSP responder is taken from isserCert.

If the root certificate is ommited from the constructor, then the signature on the OCSP response is only validated against the list of certificates in the OCSPResponse. No link to a trusted anchor is verified in that case.

### Arguments

Type | Name | Description
--- | --- | ---
`X509` | rootCert | Root certificate used for verification of OCSP response signature
`X509` | issuerCert | Certificate of instance that issued the certificate for which a query should be done.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Arguments must be of type X509

### Example

    rootcert = new X509("root.cer");
    cacert = new X509("ca.cer");

    query = new OCSPQuery(cacert);

    query = new OCSPQuery(rootcert, cacert);

## add()

### Prototype

OCSPQuery add(X509 cert)

### Description

Add a certificate to the query. The certificate must be issued by the instance identified by the isserCert certificate in the OCSPQuery constructor. Multiple certificates can be included in a single query.

### Arguments

Type | Name | Description
--- | --- | ---
`X509` | cert | Certificate to include in query

### Return

`OCSPQuery` | The object this method is applied to

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Type of argument is invalid for call
GPError | GPError.INVALID_DATA | Certificate is invalid for inclusion in query

### Example

    goodcert = new X509("ee_good.cer");
    revokedcert = new X509("ee_revoked.cer");

    query.add(goodcert);
    assert(query.add(revokedcert) instanceof OCSPQuery);

## execute()

### Prototype

OCSPQuery execute()

OCSPQuery execute(String url)

### Description

Execute query against OCSP server. This is a one in all method. It extracts the URL from the issuer certificate (unless specified), builds the request, posts the message, obtains the response and decodes the status information.

### Arguments

Type | Name | Description
--- | --- | ---
`String` | url | URL of OCSP responder.

### Return

`OCSPQuery` | The object this method is applied to

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.DEVICE_ERROR | The query could not be completed successfully

### Example

    /*

    assert(query.execute() instanceof OCSPQuery);

    */

## post()

### Prototype

OCSPQuery post(String url, ByteString request)

OCSPQuery post(String url, ByteString request, String[] header)

### Description

Send a request to the server identified by the url with a custom HTTP header. This method is suitable for test setups using custom build requests and header fields.

### Arguments

Type | Name | Description
--- | --- | ---
`String` | url | URL of OCSP responder.
`ByteString` | request | DER encoded request
`String[]` | header | Custom HTTP header field in the format "key: value". Will disable automatically generated header fields Content-Type and Content-Length.

### Return

`ByteString` | The response returned from the server

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | One or more arguments do not match
GPError | GPError.DEVICE_ERROR | The query could not be completed successfully

### Example

    /*
    var request = query.getRequest();
    var response = query.post("http://ocsp.ecard.sozialversicherung.at", request);
    assert(response.length > 0);

    var header = [ "Content-Length: " + request.length, "Content-Type: application/ocsp-request" ];
    var response = query.post("http://ocsp.ecard.sozialversicherung.at", request, header);
    assert(response.length > 0);
    */

## getStatus()

### Prototype

Number getStatus(X509 cert)

### Description

Query status from cached result of previous query operation

### Arguments

Type | Name | Description
--- | --- | ---
`X509` | cert | Certificate in question

### Return

`Number` | Status of the certificate as indicated by the responder. This is one of the constant values defined for this object.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Arguments must be of type X509
GPError | GPError.DEVICE_ERROR | The query could not be completed successfully

### Example

    assert(query.getStatus(goodcert) == OCSPQuery.GOOD);
    assert(query.getStatus(revokedcert) != OCSPQuery.GOOD);

## getStatusString()

### Prototype

String getStatusString(X509 cert)

### Description

Query status from cached result of previous query operation and return a human readable string

### Arguments

Type | Name | Description
--- | --- | ---
`X509` | cert | Certificate in question

### Return

`String` | Status of the certificate as indicated by the responder.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Arguments must be of type X509
GPError | GPError.DEVICE_ERROR | The query could not be completed successfully

### Example

    print("ee_good.cer    : " + query.getStatusString(goodcert));
    print("ee_revoked.cer : " + query.getStatusString(revokedcert));

## getRevocationTime()

### Prototype

Date getRevocationTime(X509 cert)

### Description

Query revocation time from cached result of previous query operation

### Arguments

Type | Name | Description
--- | --- | ---
`X509` | cert | Certificate in question

### Return

`Date` | Revocation time of the certificate as indicated by the responder.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Arguments must be of type X509
GPError | GPError.DEVICE_ERROR | The query could not be completed successfully

### Example

    var rt = query.getRevocationTime(revokedcert);
    assert(rt instanceof Date);
    print("ee_revoked.cer : " + rt);

## getRequest()

### Prototype

ByteString getRequest()

### Description

Obtain DER encoded OCSP request

### Return

`ByteString` | DER encoded request.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.DEVICE_ERROR | An error occured building the request

### Example

    req = query.getRequest();
    assert(req instanceof ByteString);
    print(req.toString(HEX));

## getResponse()

### Prototype

ByteString getResponse()

### Description

Obtain DER encoded OCSP response as returned from OCSP server

### Return

`ByteString` | DER encoded response.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.DEVICE_ERROR | An error occured building the response

### Example

    res = query.getResponse();
    assert(res instanceof ByteString);
    print(res.toString(HEX));

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