1 // Copyright (c) 2012 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 "net/tools/flip_server/spdy_ssl.h"
6
7 #include "base/logging.h"
8 #include "openssl/err.h"
9 #include "openssl/ssl.h"
10
11 namespace net {
12
13 // Each element consists of <the length of the string><string> .
14 #define NEXT_PROTO_STRING \
15 "\x08spdy/4a2" \
16 "\x06spdy/3" \
17 "\x06spdy/2" \
18 "\x08http/1.1" \
19 "\x08http/1.0"
20 #define SSL_CIPHER_LIST "!aNULL:!ADH:!eNull:!LOW:!EXP:RC4+RSA:MEDIUM:HIGH"
21
ssl_set_npn_callback(SSL * s,const unsigned char ** data,unsigned int * len,void * arg)22 int ssl_set_npn_callback(SSL* s,
23 const unsigned char** data,
24 unsigned int* len,
25 void* arg) {
26 VLOG(1) << "SSL NPN callback: advertising protocols.";
27 *data = (const unsigned char*)NEXT_PROTO_STRING;
28 *len = strlen(NEXT_PROTO_STRING);
29 return SSL_TLSEXT_ERR_OK;
30 }
31
InitSSL(SSLState * state,std::string ssl_cert_name,std::string ssl_key_name,bool use_npn,int session_expiration_time,bool disable_ssl_compression)32 void InitSSL(SSLState* state,
33 std::string ssl_cert_name,
34 std::string ssl_key_name,
35 bool use_npn,
36 int session_expiration_time,
37 bool disable_ssl_compression) {
38 SSL_library_init();
39 PrintSslError();
40
41 SSL_load_error_strings();
42 PrintSslError();
43
44 state->ssl_method = SSLv23_method();
45 state->ssl_ctx = SSL_CTX_new(state->ssl_method);
46 if (!state->ssl_ctx) {
47 PrintSslError();
48 LOG(FATAL) << "Unable to create SSL context";
49 }
50 // Disable SSLv2 support.
51 SSL_CTX_set_options(state->ssl_ctx,
52 SSL_OP_NO_SSLv2 | SSL_OP_CIPHER_SERVER_PREFERENCE);
53 if (SSL_CTX_use_certificate_chain_file(state->ssl_ctx,
54 ssl_cert_name.c_str()) <= 0) {
55 PrintSslError();
56 LOG(FATAL) << "Unable to use cert.pem as SSL cert.";
57 }
58 if (SSL_CTX_use_PrivateKey_file(
59 state->ssl_ctx, ssl_key_name.c_str(), SSL_FILETYPE_PEM) <= 0) {
60 PrintSslError();
61 LOG(FATAL) << "Unable to use key.pem as SSL key.";
62 }
63 if (!SSL_CTX_check_private_key(state->ssl_ctx)) {
64 PrintSslError();
65 LOG(FATAL) << "The cert.pem and key.pem files don't match";
66 }
67 if (use_npn) {
68 SSL_CTX_set_next_protos_advertised_cb(
69 state->ssl_ctx, ssl_set_npn_callback, NULL);
70 }
71 VLOG(1) << "SSL CTX default cipher list: " << SSL_CIPHER_LIST;
72 SSL_CTX_set_cipher_list(state->ssl_ctx, SSL_CIPHER_LIST);
73
74 VLOG(1) << "SSL CTX session expiry: " << session_expiration_time
75 << " seconds";
76 SSL_CTX_set_timeout(state->ssl_ctx, session_expiration_time);
77
78 #ifdef SSL_MODE_RELEASE_BUFFERS
79 VLOG(1) << "SSL CTX: Setting Release Buffers mode.";
80 SSL_CTX_set_mode(state->ssl_ctx, SSL_MODE_RELEASE_BUFFERS);
81 #endif
82
83 #if !defined(OPENSSL_IS_BORINGSSL)
84 // Proper methods to disable compression don't exist until 0.9.9+. For now
85 // we must manipulate the stack of compression methods directly.
86 if (disable_ssl_compression) {
87 STACK_OF(SSL_COMP)* ssl_comp_methods = SSL_COMP_get_compression_methods();
88 int num_methods = sk_SSL_COMP_num(ssl_comp_methods);
89 int i;
90 for (i = 0; i < num_methods; i++) {
91 static_cast<void>(sk_SSL_COMP_delete(ssl_comp_methods, i));
92 }
93 }
94 #endif
95 }
96
CreateSSLContext(SSL_CTX * ssl_ctx)97 SSL* CreateSSLContext(SSL_CTX* ssl_ctx) {
98 SSL* ssl = SSL_new(ssl_ctx);
99 SSL_set_accept_state(ssl);
100 PrintSslError();
101 return ssl;
102 }
103
PrintSslError()104 void PrintSslError() {
105 char buf[128]; // this buffer must be at least 120 chars long.
106 int error_num = ERR_get_error();
107 while (error_num != 0) {
108 ERR_error_string_n(error_num, buf, sizeof(buf));
109 LOG(ERROR) << buf;
110 error_num = ERR_get_error();
111 }
112 }
113
114 } // namespace net
115