henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 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 | |
| 23 | typedef struct ssl_ctx_st SSL_CTX; |
| 24 | |
| 25 | namespace rtc { |
| 26 | |
| 27 | // OpenSSLKeyPair encapsulates an OpenSSL EVP_PKEY* keypair object, |
| 28 | // which is reference counted inside the OpenSSL library. |
| 29 | class OpenSSLKeyPair { |
| 30 | public: |
| 31 | explicit OpenSSLKeyPair(EVP_PKEY* pkey) : pkey_(pkey) { |
| 32 | ASSERT(pkey_ != NULL); |
| 33 | } |
| 34 | |
| 35 | static OpenSSLKeyPair* Generate(); |
| 36 | |
| 37 | virtual ~OpenSSLKeyPair(); |
| 38 | |
| 39 | virtual OpenSSLKeyPair* GetReference() { |
| 40 | AddReference(); |
| 41 | return new OpenSSLKeyPair(pkey_); |
| 42 | } |
| 43 | |
| 44 | EVP_PKEY* pkey() const { return pkey_; } |
| 45 | |
| 46 | private: |
| 47 | void AddReference(); |
| 48 | |
| 49 | EVP_PKEY* pkey_; |
| 50 | |
| 51 | DISALLOW_EVIL_CONSTRUCTORS(OpenSSLKeyPair); |
| 52 | }; |
| 53 | |
| 54 | // OpenSSLCertificate encapsulates an OpenSSL X509* certificate object, |
| 55 | // which is also reference counted inside the OpenSSL library. |
| 56 | class OpenSSLCertificate : public SSLCertificate { |
| 57 | public: |
| 58 | // Caller retains ownership of the X509 object. |
| 59 | explicit OpenSSLCertificate(X509* x509) : x509_(x509) { |
| 60 | AddReference(); |
| 61 | } |
| 62 | |
| 63 | static OpenSSLCertificate* Generate(OpenSSLKeyPair* key_pair, |
| 64 | const SSLIdentityParams& params); |
| 65 | static OpenSSLCertificate* FromPEMString(const std::string& pem_string); |
| 66 | |
| 67 | virtual ~OpenSSLCertificate(); |
| 68 | |
| 69 | virtual OpenSSLCertificate* GetReference() const { |
| 70 | return new OpenSSLCertificate(x509_); |
| 71 | } |
| 72 | |
| 73 | X509* x509() const { return x509_; } |
| 74 | |
| 75 | virtual std::string ToPEMString() const; |
| 76 | |
| 77 | virtual void ToDER(Buffer* der_buffer) const; |
| 78 | |
| 79 | // Compute the digest of the certificate given algorithm |
| 80 | virtual bool ComputeDigest(const std::string& algorithm, |
| 81 | unsigned char* digest, |
| 82 | size_t size, |
| 83 | size_t* length) const; |
| 84 | |
| 85 | // Compute the digest of a certificate as an X509 * |
| 86 | static bool ComputeDigest(const X509* x509, |
| 87 | const std::string& algorithm, |
| 88 | unsigned char* digest, |
| 89 | size_t size, |
| 90 | size_t* length); |
| 91 | |
| 92 | virtual bool GetSignatureDigestAlgorithm(std::string* algorithm) const; |
| 93 | |
| 94 | virtual bool GetChain(SSLCertChain** chain) const { |
| 95 | // Chains are not yet supported when using OpenSSL. |
| 96 | // OpenSSLStreamAdapter::SSLVerifyCallback currently requires the remote |
| 97 | // certificate to be self-signed. |
| 98 | return false; |
| 99 | } |
| 100 | |
| 101 | private: |
| 102 | void AddReference() const; |
| 103 | |
| 104 | X509* x509_; |
| 105 | |
| 106 | DISALLOW_EVIL_CONSTRUCTORS(OpenSSLCertificate); |
| 107 | }; |
| 108 | |
| 109 | // Holds a keypair and certificate together, and a method to generate |
| 110 | // them consistently. |
| 111 | class OpenSSLIdentity : public SSLIdentity { |
| 112 | public: |
| 113 | static OpenSSLIdentity* Generate(const std::string& common_name); |
| 114 | static OpenSSLIdentity* GenerateForTest(const SSLIdentityParams& params); |
| 115 | static SSLIdentity* FromPEMStrings(const std::string& private_key, |
| 116 | const std::string& certificate); |
| 117 | virtual ~OpenSSLIdentity() { } |
| 118 | |
| 119 | virtual const OpenSSLCertificate& certificate() const { |
| 120 | return *certificate_; |
| 121 | } |
| 122 | |
| 123 | virtual OpenSSLIdentity* GetReference() const { |
| 124 | return new OpenSSLIdentity(key_pair_->GetReference(), |
| 125 | certificate_->GetReference()); |
| 126 | } |
| 127 | |
| 128 | // Configure an SSL context object to use our key and certificate. |
| 129 | bool ConfigureIdentity(SSL_CTX* ctx); |
| 130 | |
| 131 | private: |
| 132 | OpenSSLIdentity(OpenSSLKeyPair* key_pair, |
| 133 | OpenSSLCertificate* certificate) |
| 134 | : key_pair_(key_pair), certificate_(certificate) { |
| 135 | ASSERT(key_pair != NULL); |
| 136 | ASSERT(certificate != NULL); |
| 137 | } |
| 138 | |
| 139 | static OpenSSLIdentity* GenerateInternal(const SSLIdentityParams& params); |
| 140 | |
| 141 | scoped_ptr<OpenSSLKeyPair> key_pair_; |
| 142 | scoped_ptr<OpenSSLCertificate> certificate_; |
| 143 | |
| 144 | DISALLOW_EVIL_CONSTRUCTORS(OpenSSLIdentity); |
| 145 | }; |
| 146 | |
| 147 | |
| 148 | } // namespace rtc |
| 149 | |
| 150 | #endif // WEBRTC_BASE_OPENSSLIDENTITY_H_ |