1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "crypto/openssl_util.h" 6 7 #if defined(OPENSSL_IS_BORINGSSL) 8 #include <openssl/cpu.h> 9 #else 10 #include <openssl/ssl.h> 11 #endif 12 #include <openssl/crypto.h> 13 #include <openssl/err.h> 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include "base/logging.h" 18 #include "base/strings/string_piece.h" 19 20 namespace crypto { 21 22 namespace { 23 24 // Callback routine for OpenSSL to print error messages. |str| is a 25 // NULL-terminated string of length |len| containing diagnostic information 26 // such as the library, function and reason for the error, the file and line 27 // where the error originated, plus potentially any context-specific 28 // information about the error. |context| contains a pointer to user-supplied 29 // data, which is currently unused. 30 // If this callback returns a value <= 0, OpenSSL will stop processing the 31 // error queue and return, otherwise it will continue calling this function 32 // until all errors have been removed from the queue. 33 int OpenSSLErrorCallback(const char* str, size_t len, void* context) { 34 DVLOG(1) << "\t" << base::StringPiece(str, len); 35 return 1; 36 } 37 38 } // namespace 39 40 void EnsureOpenSSLInit() { 41 #if defined(OPENSSL_IS_BORINGSSL) 42 // CRYPTO_library_init may be safely called concurrently. 43 CRYPTO_library_init(); 44 #else 45 SSL_library_init(); 46 #endif 47 } 48 49 void ClearOpenSSLERRStack(const tracked_objects::Location& location) { 50 if (logging::DEBUG_MODE && VLOG_IS_ON(1)) { 51 uint32_t error_num = ERR_peek_error(); 52 if (error_num == 0) 53 return; 54 55 std::string message; 56 location.Write(true, true, &message); 57 DVLOG(1) << "OpenSSL ERR_get_error stack from " << message; 58 ERR_print_errors_cb(&OpenSSLErrorCallback, NULL); 59 } else { 60 ERR_clear_error(); 61 } 62 } 63 64 } // namespace crypto 65
