1/*
2 *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_OPENSSLIDENTITY_H_
12#define WEBRTC_BASE_OPENSSLIDENTITY_H_
13
14#include <openssl/evp.h>
15#include <openssl/x509.h>
16
17#include <string>
18
19#include "webrtc/base/common.h"
20#include "webrtc/base/scoped_ptr.h"
21#include "webrtc/base/sslidentity.h"
22
23typedef struct ssl_ctx_st SSL_CTX;
24
25namespace rtc {
26
27// OpenSSLKeyPair encapsulates an OpenSSL EVP_PKEY* keypair object,
28// which is reference counted inside the OpenSSL library.
29class OpenSSLKeyPair {
30 public:
31  explicit OpenSSLKeyPair(EVP_PKEY* pkey) : pkey_(pkey) {
32    ASSERT(pkey_ != NULL);
33  }
34
35  static OpenSSLKeyPair* Generate(const KeyParams& key_params);
36
37  virtual ~OpenSSLKeyPair();
38
39  virtual OpenSSLKeyPair* GetReference();
40
41  EVP_PKEY* pkey() const { return pkey_; }
42
43 private:
44  void AddReference();
45
46  EVP_PKEY* pkey_;
47
48  RTC_DISALLOW_COPY_AND_ASSIGN(OpenSSLKeyPair);
49};
50
51// OpenSSLCertificate encapsulates an OpenSSL X509* certificate object,
52// which is also reference counted inside the OpenSSL library.
53class OpenSSLCertificate : public SSLCertificate {
54 public:
55  // Caller retains ownership of the X509 object.
56  explicit OpenSSLCertificate(X509* x509) : x509_(x509) {
57    AddReference();
58  }
59
60  static OpenSSLCertificate* Generate(OpenSSLKeyPair* key_pair,
61                                      const SSLIdentityParams& params);
62  static OpenSSLCertificate* FromPEMString(const std::string& pem_string);
63
64  ~OpenSSLCertificate() override;
65
66  OpenSSLCertificate* GetReference() const override;
67
68  X509* x509() const { return x509_; }
69
70  std::string ToPEMString() const override;
71
72  void ToDER(Buffer* der_buffer) const override;
73
74  // Compute the digest of the certificate given algorithm
75  bool ComputeDigest(const std::string& algorithm,
76                     unsigned char* digest,
77                     size_t size,
78                     size_t* length) const override;
79
80  // Compute the digest of a certificate as an X509 *
81  static bool ComputeDigest(const X509* x509,
82                            const std::string& algorithm,
83                            unsigned char* digest,
84                            size_t size,
85                            size_t* length);
86
87  bool GetSignatureDigestAlgorithm(std::string* algorithm) const override;
88  bool GetChain(SSLCertChain** chain) const override;
89
90  int64_t CertificateExpirationTime() const override;
91
92 private:
93  void AddReference() const;
94
95  X509* x509_;
96
97  RTC_DISALLOW_COPY_AND_ASSIGN(OpenSSLCertificate);
98};
99
100// Holds a keypair and certificate together, and a method to generate
101// them consistently.
102class OpenSSLIdentity : public SSLIdentity {
103 public:
104  static OpenSSLIdentity* Generate(const std::string& common_name,
105                                   const KeyParams& key_params);
106  static OpenSSLIdentity* GenerateForTest(const SSLIdentityParams& params);
107  static SSLIdentity* FromPEMStrings(const std::string& private_key,
108                                     const std::string& certificate);
109  ~OpenSSLIdentity() override;
110
111  const OpenSSLCertificate& certificate() const override;
112  OpenSSLIdentity* GetReference() const override;
113
114  // Configure an SSL context object to use our key and certificate.
115  bool ConfigureIdentity(SSL_CTX* ctx);
116
117 private:
118  OpenSSLIdentity(OpenSSLKeyPair* key_pair, OpenSSLCertificate* certificate);
119
120  static OpenSSLIdentity* GenerateInternal(const SSLIdentityParams& params);
121
122  scoped_ptr<OpenSSLKeyPair> key_pair_;
123  scoped_ptr<OpenSSLCertificate> certificate_;
124
125  RTC_DISALLOW_COPY_AND_ASSIGN(OpenSSLIdentity);
126};
127
128
129}  // namespace rtc
130
131#endif  // WEBRTC_BASE_OPENSSLIDENTITY_H_
132