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