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/*
* libjingle
* Copyright 2004--2008, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_OPENSSLIDENTITY_H_
#define TALK_BASE_OPENSSLIDENTITY_H_
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <string>
#include "talk/base/common.h"
#include "talk/base/scoped_ptr.h"
#include "talk/base/sslidentity.h"
typedef struct ssl_ctx_st SSL_CTX;
namespace talk_base {
// OpenSSLKeyPair encapsulates an OpenSSL EVP_PKEY* keypair object,
// which is reference counted inside the OpenSSL library.
class OpenSSLKeyPair {
public:
explicit OpenSSLKeyPair(EVP_PKEY* pkey) : pkey_(pkey) {
ASSERT(pkey_ != NULL);
}
static OpenSSLKeyPair* Generate();
virtual ~OpenSSLKeyPair();
virtual OpenSSLKeyPair* GetReference() {
AddReference();
return new OpenSSLKeyPair(pkey_);
}
EVP_PKEY* pkey() const { return pkey_; }
private:
void AddReference();
EVP_PKEY* pkey_;
DISALLOW_EVIL_CONSTRUCTORS(OpenSSLKeyPair);
};
// OpenSSLCertificate encapsulates an OpenSSL X509* certificate object,
// which is also reference counted inside the OpenSSL library.
class OpenSSLCertificate : public SSLCertificate {
public:
// Caller retains ownership of the X509 object.
explicit OpenSSLCertificate(X509* x509) : x509_(x509) {
AddReference();
}
static OpenSSLCertificate* Generate(OpenSSLKeyPair* key_pair,
const std::string& common_name);
static OpenSSLCertificate* FromPEMString(const std::string& pem_string);
virtual ~OpenSSLCertificate();
virtual OpenSSLCertificate* GetReference() const {
return new OpenSSLCertificate(x509_);
}
X509* x509() const { return x509_; }
virtual std::string ToPEMString() const;
virtual void ToDER(Buffer* der_buffer) const;
// Compute the digest of the certificate given algorithm
virtual bool ComputeDigest(const std::string &algorithm,
unsigned char *digest, std::size_t size,
std::size_t *length) const;
// Compute the digest of a certificate as an X509 *
static bool ComputeDigest(const X509 *x509,
const std::string &algorithm,
unsigned char *digest,
std::size_t size,
std::size_t *length);
virtual bool GetSignatureDigestAlgorithm(std::string* algorithm) const;
virtual bool GetChain(SSLCertChain** chain) const {
// Chains are not yet supported when using OpenSSL.
// OpenSSLStreamAdapter::SSLVerifyCallback currently requires the remote
// certificate to be self-signed.
return false;
}
private:
void AddReference() const;
X509* x509_;
DISALLOW_EVIL_CONSTRUCTORS(OpenSSLCertificate);
};
// Holds a keypair and certificate together, and a method to generate
// them consistently.
class OpenSSLIdentity : public SSLIdentity {
public:
static OpenSSLIdentity* Generate(const std::string& common_name);
static SSLIdentity* FromPEMStrings(const std::string& private_key,
const std::string& certificate);
virtual ~OpenSSLIdentity() { }
virtual const OpenSSLCertificate& certificate() const {
return *certificate_;
}
virtual OpenSSLIdentity* GetReference() const {
return new OpenSSLIdentity(key_pair_->GetReference(),
certificate_->GetReference());
}
// Configure an SSL context object to use our key and certificate.
bool ConfigureIdentity(SSL_CTX* ctx);
private:
OpenSSLIdentity(OpenSSLKeyPair* key_pair,
OpenSSLCertificate* certificate)
: key_pair_(key_pair), certificate_(certificate) {
ASSERT(key_pair != NULL);
ASSERT(certificate != NULL);
}
scoped_ptr<OpenSSLKeyPair> key_pair_;
scoped_ptr<OpenSSLCertificate> certificate_;
DISALLOW_EVIL_CONSTRUCTORS(OpenSSLIdentity);
};
} // namespace talk_base
#endif // TALK_BASE_OPENSSLIDENTITY_H_
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