1 files changed, 62 insertions, 0 deletions
diff --git a/chromium/third_party/nearby/src/internal/crypto/openssl_util.cc b/chromium/third_party/nearby/src/internal/crypto/openssl_util.cc
new file mode 100644
index 00000000000..1568612d91c
--- /dev/null
+++ b/chromium/third_party/nearby/src/internal/crypto/openssl_util.cc
@@ -0,0 +1,62 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal/crypto/openssl_util.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "internal/platform/logging.h"
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+
+namespace crypto {
+
+namespace {
+
+// Callback routine for OpenSSL to print error messages. |str| is a
+// NULL-terminated string of length |len| containing diagnostic information
+// such as the library, function and reason for the error, the file and line
+// where the error originated, plus potentially any context-specific
+// information about the error. |context| contains a pointer to user-supplied
+// data, which is currently unused.
+// If this callback returns a value <= 0, OpenSSL will stop processing the
+// error queue and return, otherwise it will continue calling this function
+// until all errors have been removed from the queue.
+int OpenSSLErrorCallback(const char* str, size_t len, void* context) {
+  NEARBY_LOGS(VERBOSE) << "\t" << absl::string_view(str, len);
+  return 1;
+}
+
+}  // namespace
+
+void EnsureOpenSSLInit() {
+  // CRYPTO_library_init may be safely called concurrently.
+  CRYPTO_library_init();
+}
+
+void ClearOpenSSLERRStack() {
+  if (NEARBY_LOG_IS_ON(VERBOSE)) {
+    uint32_t error_num = ERR_peek_error();
+    if (error_num == 0) return;
+    ERR_print_errors_cb(&OpenSSLErrorCallback, nullptr);
+  } else {
+    ERR_clear_error();
+  }
+}
+
+}  // namespace crypto