Adds a modified copy of talk/base to webrtc/base. It is the first step in
migrating talk/base to webrtc/base.

BUG=N/A
R=niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/17479005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6129 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/base/fakesslidentity.h b/webrtc/base/fakesslidentity.h
new file mode 100644
index 0000000..717cb6c
--- /dev/null
+++ b/webrtc/base/fakesslidentity.h
@@ -0,0 +1,94 @@
+/*
+ *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_BASE_FAKESSLIDENTITY_H_
+#define WEBRTC_BASE_FAKESSLIDENTITY_H_
+
+#include <algorithm>
+#include <vector>
+
+#include "webrtc/base/messagedigest.h"
+#include "webrtc/base/sslidentity.h"
+
+namespace rtc {
+
+class FakeSSLCertificate : public rtc::SSLCertificate {
+ public:
+  // SHA-1 is the default digest algorithm because it is available in all build
+  // configurations used for unit testing.
+  explicit FakeSSLCertificate(const std::string& data)
+      : data_(data), digest_algorithm_(DIGEST_SHA_1) {}
+  explicit FakeSSLCertificate(const std::vector<std::string>& certs)
+      : data_(certs.front()), digest_algorithm_(DIGEST_SHA_1) {
+    std::vector<std::string>::const_iterator it;
+    // Skip certs[0].
+    for (it = certs.begin() + 1; it != certs.end(); ++it) {
+      certs_.push_back(FakeSSLCertificate(*it));
+    }
+  }
+  virtual FakeSSLCertificate* GetReference() const {
+    return new FakeSSLCertificate(*this);
+  }
+  virtual std::string ToPEMString() const {
+    return data_;
+  }
+  virtual void ToDER(Buffer* der_buffer) const {
+    std::string der_string;
+    VERIFY(SSLIdentity::PemToDer(kPemTypeCertificate, data_, &der_string));
+    der_buffer->SetData(der_string.c_str(), der_string.size());
+  }
+  void set_digest_algorithm(const std::string& algorithm) {
+    digest_algorithm_ = algorithm;
+  }
+  virtual bool GetSignatureDigestAlgorithm(std::string* algorithm) const {
+    *algorithm = digest_algorithm_;
+    return true;
+  }
+  virtual bool ComputeDigest(const std::string& algorithm,
+                             unsigned char* digest,
+                             size_t size,
+                             size_t* length) const {
+    *length = rtc::ComputeDigest(algorithm, data_.c_str(), data_.size(),
+                                       digest, size);
+    return (*length != 0);
+  }
+  virtual bool GetChain(SSLCertChain** chain) const {
+    if (certs_.empty())
+      return false;
+    std::vector<SSLCertificate*> new_certs(certs_.size());
+    std::transform(certs_.begin(), certs_.end(), new_certs.begin(), DupCert);
+    *chain = new SSLCertChain(new_certs);
+    return true;
+  }
+
+ private:
+  static FakeSSLCertificate* DupCert(FakeSSLCertificate cert) {
+    return cert.GetReference();
+  }
+  std::string data_;
+  std::vector<FakeSSLCertificate> certs_;
+  std::string digest_algorithm_;
+};
+
+class FakeSSLIdentity : public rtc::SSLIdentity {
+ public:
+  explicit FakeSSLIdentity(const std::string& data) : cert_(data) {}
+  explicit FakeSSLIdentity(const FakeSSLCertificate& cert) : cert_(cert) {}
+  virtual FakeSSLIdentity* GetReference() const {
+    return new FakeSSLIdentity(*this);
+  }
+  virtual const FakeSSLCertificate& certificate() const { return cert_; }
+ private:
+  FakeSSLCertificate cert_;
+};
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_FAKESSLIDENTITY_H_