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/*
* OCSP
* (C) 2012 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_OCSP_H__
#define BOTAN_OCSP_H__
#include <botan/cert_status.h>
#include <botan/ocsp_types.h>
namespace Botan {
class Certificate_Store;
namespace OCSP {
/**
* An OCSP request.
*/
class BOTAN_DLL Request
{
public:
/**
* Create an OCSP request.
* @param issuer_cert issuer certificate
* @param subject_cert subject certificate
*/
Request(const X509_Certificate& issuer_cert,
const X509_Certificate& subject_cert);
/**
* @return BER-encoded OCSP request
*/
std::vector<uint8_t> BER_encode() const;
/**
* @return Base64-encoded OCSP request
*/
std::string base64_encode() const;
/**
* @return issuer certificate
*/
const X509_Certificate& issuer() const { return m_issuer; }
/**
* @return subject certificate
*/
const X509_Certificate& subject() const { return m_subject; }
const std::vector<uint8_t>& issuer_key_hash() const
{ return m_certid.issuer_key_hash(); }
private:
X509_Certificate m_issuer, m_subject;
CertID m_certid;
};
/**
* OCSP response.
*
* Note this class is only usable as an OCSP client
*/
class BOTAN_DLL Response
{
public:
/**
* Creates an empty OCSP response.
*/
Response() {}
/**
* Parses an OCSP response.
* @param response_bits response bits received
*/
Response(const std::vector<uint8_t>& response_bits) :
Response(response_bits.data(), response_bits.size())
{}
/**
* Parses an OCSP response.
* @param response_bits response bits received
* @param response_bits_len length of response in bytes
*/
Response(const uint8_t response_bits[],
size_t response_bits_len);
/**
* Check signature and return status
* The optional cert_path is the (already validated!) certificate path of
* the end entity which is being inquired about
* @param trust_roots list of certstores containing trusted roots
* @param cert_path optionally, the (already verified!) certificate path for the certificate
* this is an OCSP response for. This is necessary to find the correct intermediate CA in
* some cases.
*/
Certificate_Status_Code check_signature(const std::vector<Certificate_Store*>& trust_roots,
const std::vector<std::shared_ptr<const X509_Certificate>>& cert_path = {}) const;
/**
* Verify that issuer's key signed this response
* @param issuer certificate of issuer
* @return if signature valid OCSP_SIGNATURE_OK else an error code
*/
Certificate_Status_Code verify_signature(const X509_Certificate& issuer) const;
/**
* @return the time this OCSP response was supposedly produced at
*/
const X509_Time& produced_at() const { return m_produced_at; }
/**
* @return DN of signer, if provided in response (may be empty)
*/
const X509_DN& signer_name() const { return m_signer_name; }
/**
* @return key hash, if provided in response (may be empty)
*/
const std::vector<uint8_t>& signer_key_hash() const { return m_key_hash; }
const std::vector<uint8_t>& raw_bits() const { return m_response_bits; }
/**
* Searches the OCSP response for issuer and subject certificate.
* @param issuer issuer certificate
* @param subject subject certificate
* @param ref_time the reference time
* @return OCSP status code, possible values:
* CERT_IS_REVOKED,
* OCSP_NOT_YET_VALID,
* OCSP_HAS_EXPIRED,
* OCSP_RESPONSE_GOOD,
* OCSP_BAD_STATUS,
* OCSP_CERT_NOT_LISTED
*/
Certificate_Status_Code status_for(const X509_Certificate& issuer,
const X509_Certificate& subject,
std::chrono::system_clock::time_point ref_time = std::chrono::system_clock::now()) const;
private:
std::vector<uint8_t> m_response_bits;
X509_Time m_produced_at;
X509_DN m_signer_name;
std::vector<uint8_t> m_key_hash;
std::vector<uint8_t> m_tbs_bits;
AlgorithmIdentifier m_sig_algo;
std::vector<uint8_t> m_signature;
std::vector<X509_Certificate> m_certs;
std::vector<SingleResponse> m_responses;
};
#if defined(BOTAN_HAS_HTTP_UTIL)
/**
* Makes an online OCSP request via HTTP and returns the OCSP response.
* @param issuer issuer certificate
* @param subject subject certificate
* @param trusted_roots trusted roots for the OCSP response
* @return OCSP response
*/
BOTAN_DLL Response online_check(const X509_Certificate& issuer,
const X509_Certificate& subject,
Certificate_Store* trusted_roots);
#endif
}
}
#endif
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