1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// Handling of certificates and keypairs for SSLStreamAdapter's peer mode.
#if HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H
#include "webrtc/base/sslidentity.h"
#include <string>
#include "webrtc/base/base64.h"
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/sslconfig.h"
#if SSL_USE_OPENSSL
#include "webrtc/base/opensslidentity.h"
#endif // SSL_USE_OPENSSL
namespace rtc {
const char kPemTypeCertificate[] = "CERTIFICATE";
const char kPemTypeRsaPrivateKey[] = "RSA PRIVATE KEY";
const char kPemTypeEcPrivateKey[] = "EC PRIVATE KEY";
KeyParams::KeyParams(KeyType key_type) {
if (key_type == KT_ECDSA) {
type_ = KT_ECDSA;
params_.curve = EC_NIST_P256;
} else if (key_type == KT_RSA) {
type_ = KT_RSA;
params_.rsa.mod_size = kRsaDefaultModSize;
params_.rsa.pub_exp = kRsaDefaultExponent;
} else {
RTC_NOTREACHED();
}
}
// static
KeyParams KeyParams::RSA(int mod_size, int pub_exp) {
KeyParams kt(KT_RSA);
kt.params_.rsa.mod_size = mod_size;
kt.params_.rsa.pub_exp = pub_exp;
return kt;
}
// static
KeyParams KeyParams::ECDSA(ECCurve curve) {
KeyParams kt(KT_ECDSA);
kt.params_.curve = curve;
return kt;
}
bool KeyParams::IsValid() const {
if (type_ == KT_RSA) {
return (params_.rsa.mod_size >= kRsaMinModSize &&
params_.rsa.mod_size <= kRsaMaxModSize &&
params_.rsa.pub_exp > params_.rsa.mod_size);
} else if (type_ == KT_ECDSA) {
return (params_.curve == EC_NIST_P256);
}
return false;
}
RSAParams KeyParams::rsa_params() const {
RTC_DCHECK(type_ == KT_RSA);
return params_.rsa;
}
ECCurve KeyParams::ec_curve() const {
RTC_DCHECK(type_ == KT_ECDSA);
return params_.curve;
}
KeyType IntKeyTypeFamilyToKeyType(int key_type_family) {
return static_cast<KeyType>(key_type_family);
}
bool SSLIdentity::PemToDer(const std::string& pem_type,
const std::string& pem_string,
std::string* der) {
// Find the inner body. We need this to fulfill the contract of
// returning pem_length.
size_t header = pem_string.find("-----BEGIN " + pem_type + "-----");
if (header == std::string::npos)
return false;
size_t body = pem_string.find("\n", header);
if (body == std::string::npos)
return false;
size_t trailer = pem_string.find("-----END " + pem_type + "-----");
if (trailer == std::string::npos)
return false;
std::string inner = pem_string.substr(body + 1, trailer - (body + 1));
*der = Base64::Decode(inner, Base64::DO_PARSE_WHITE |
Base64::DO_PAD_ANY |
Base64::DO_TERM_BUFFER);
return true;
}
std::string SSLIdentity::DerToPem(const std::string& pem_type,
const unsigned char* data,
size_t length) {
std::stringstream result;
result << "-----BEGIN " << pem_type << "-----\n";
std::string b64_encoded;
Base64::EncodeFromArray(data, length, &b64_encoded);
// Divide the Base-64 encoded data into 64-character chunks, as per
// 4.3.2.4 of RFC 1421.
static const size_t kChunkSize = 64;
size_t chunks = (b64_encoded.size() + (kChunkSize - 1)) / kChunkSize;
for (size_t i = 0, chunk_offset = 0; i < chunks;
++i, chunk_offset += kChunkSize) {
result << b64_encoded.substr(chunk_offset, kChunkSize);
result << "\n";
}
result << "-----END " << pem_type << "-----\n";
return result.str();
}
SSLCertChain::SSLCertChain(const std::vector<SSLCertificate*>& certs) {
ASSERT(!certs.empty());
certs_.resize(certs.size());
std::transform(certs.begin(), certs.end(), certs_.begin(), DupCert);
}
SSLCertChain::SSLCertChain(const SSLCertificate* cert) {
certs_.push_back(cert->GetReference());
}
SSLCertChain::~SSLCertChain() {
std::for_each(certs_.begin(), certs_.end(), DeleteCert);
}
#if SSL_USE_OPENSSL
SSLCertificate* SSLCertificate::FromPEMString(const std::string& pem_string) {
return OpenSSLCertificate::FromPEMString(pem_string);
}
SSLIdentity* SSLIdentity::Generate(const std::string& common_name,
const KeyParams& key_params) {
return OpenSSLIdentity::Generate(common_name, key_params);
}
SSLIdentity* SSLIdentity::GenerateForTest(const SSLIdentityParams& params) {
return OpenSSLIdentity::GenerateForTest(params);
}
SSLIdentity* SSLIdentity::FromPEMStrings(const std::string& private_key,
const std::string& certificate) {
return OpenSSLIdentity::FromPEMStrings(private_key, certificate);
}
#else // !SSL_USE_OPENSSL
#error "No SSL implementation"
#endif // SSL_USE_OPENSSL
} // namespace rtc
|
