[ios] Removed CertVerifierBlockAdapter.

net/cert/sec_trust_util.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/cert/sec_trust_util.h"
+
+#include "base/mac/scoped_cftyperef.h"
+
+using base::ScopedCFTypeRef;
+
+namespace net {
+
+// The iOS APIs don't expose an API-stable set of reasons for certificate
+// validation failures. However, internally, the reason is tracked, and it's
+// converted to user-facing localized strings.
+//
+// In the absence of a consistent API, convert the English strings to their
+// localized counterpart, and then compare that with the error properties. If
+// they're equal, it's a strong sign that this was the cause for the error.
+// While this will break if/when iOS changes the contents of these strings,
+// it's sufficient enough for now.
+//
+// TODO(rsleevi): https://crbug.com/601915 - Use a less brittle solution when
+// possible.
+CertStatus GetCertFailureStatusFromTrust(SecTrustRef trust) {
+  CertStatus reason = 0;
+
+  base::ScopedCFTypeRef<CFArrayRef> properties(SecTrustCopyProperties(trust));
+  if (!properties)
+    return CERT_STATUS_INVALID;
+
+  const CFIndex properties_length = CFArrayGetCount(properties);
+  if (properties_length == 0)
+    return CERT_STATUS_INVALID;
+
+  CFBundleRef bundle =
+      CFBundleGetBundleWithIdentifier(CFSTR("com.apple.Security"));
+  CFStringRef date_string =
+      CFSTR("One or more certificates have expired or are not valid yet.");
+  ScopedCFTypeRef<CFStringRef> date_error(CFBundleCopyLocalizedString(
+      bundle, date_string, date_string, CFSTR("SecCertificate")));
+  CFStringRef trust_string = CFSTR("Root certificate is not trusted.");
+  ScopedCFTypeRef<CFStringRef> trust_error(CFBundleCopyLocalizedString(
+      bundle, trust_string, trust_string, CFSTR("SecCertificate")));
+  CFStringRef weak_string =
+      CFSTR("One or more certificates is using a weak key size.");
+  ScopedCFTypeRef<CFStringRef> weak_error(CFBundleCopyLocalizedString(
+      bundle, weak_string, weak_string, CFSTR("SecCertificate")));
+
+  for (CFIndex i = 0; i < properties_length; ++i) {
+    CFDictionaryRef dict = reinterpret_cast<CFDictionaryRef>(
+        const_cast<void*>(CFArrayGetValueAtIndex(properties, i)));
+    CFStringRef error = reinterpret_cast<CFStringRef>(
+        const_cast<void*>(CFDictionaryGetValue(dict, CFSTR("value"))));
+
+    if (CFEqual(error, date_error)) {
+      reason |= CERT_STATUS_DATE_INVALID;
+    } else if (CFEqual(error, trust_error)) {
+      reason |= CERT_STATUS_AUTHORITY_INVALID;
+    } else if (CFEqual(error, weak_error)) {
+      reason |= CERT_STATUS_WEAK_KEY;
+    } else {
+      reason |= CERT_STATUS_INVALID;
+    }
+  }
+
+  return reason;
+}
+
+}  // namespace net