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| 1 // Copyright 2013 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 "chrome/browser/extensions/api/networking_private/networking_private_cr
ypto.h" | |
| 6 | |
| 7 #include <cert.h> | |
| 8 #include <cryptohi.h> | |
| 9 #include <keyhi.h> | |
| 10 #include <keythi.h> | |
| 11 #include <pk11pub.h> | |
| 12 #include <sechash.h> | |
| 13 #include <secport.h> | |
| 14 | |
| 15 #include "base/base64.h" | |
| 16 #include "base/memory/scoped_ptr.h" | |
| 17 #include "base/strings/string_number_conversions.h" | |
| 18 #include "base/strings/string_util.h" | |
| 19 #include "base/strings/stringprintf.h" | |
| 20 #include "crypto/nss_util.h" | |
| 21 #include "crypto/rsa_private_key.h" | |
| 22 #include "crypto/scoped_nss_types.h" | |
| 23 #include "net/cert/pem_tokenizer.h" | |
| 24 #include "net/cert/x509_certificate.h" | |
| 25 | |
| 26 const unsigned char kTrustedCAPublicKeyDER[] = { | |
| 27 0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xbc, 0x22, 0x80, 0xbd, | |
| 28 0x80, 0xf6, 0x3a, 0x21, 0x00, 0x3b, 0xae, 0x76, 0x5e, 0x35, 0x7f, 0x3d, 0xc3, | |
| 29 0x64, 0x5c, 0x55, 0x94, 0x86, 0x34, 0x2f, 0x05, 0x87, 0x28, 0xcd, 0xf7, 0x69, | |
| 30 0x8c, 0x17, 0xb3, 0x50, 0xa7, 0xb8, 0x82, 0xfa, 0xdf, 0xc7, 0x43, 0x2d, 0xd6, | |
| 31 0x7e, 0xab, 0xa0, 0x6f, 0xb7, 0x13, 0x72, 0x80, 0xa4, 0x47, 0x15, 0xc1, 0x20, | |
| 32 0x99, 0x50, 0xcd, 0xec, 0x14, 0x62, 0x09, 0x5b, 0xa4, 0x98, 0xcd, 0xd2, 0x41, | |
| 33 0xb6, 0x36, 0x4e, 0xff, 0xe8, 0x2e, 0x32, 0x30, 0x4a, 0x81, 0xa8, 0x42, 0xa3, | |
| 34 0x6c, 0x9b, 0x33, 0x6e, 0xca, 0xb2, 0xf5, 0x53, 0x66, 0xe0, 0x27, 0x53, 0x86, | |
| 35 0x1a, 0x85, 0x1e, 0xa7, 0x39, 0x3f, 0x4a, 0x77, 0x8e, 0xfb, 0x54, 0x66, 0x66, | |
| 36 0xfb, 0x58, 0x54, 0xc0, 0x5e, 0x39, 0xc7, 0xf5, 0x50, 0x06, 0x0b, 0xe0, 0x8a, | |
| 37 0xd4, 0xce, 0xe1, 0x6a, 0x55, 0x1f, 0x8b, 0x17, 0x00, 0xe6, 0x69, 0xa3, 0x27, | |
| 38 0xe6, 0x08, 0x25, 0x69, 0x3c, 0x12, 0x9d, 0x8d, 0x05, 0x2c, 0xd6, 0x2e, 0xa2, | |
| 39 0x31, 0xde, 0xb4, 0x52, 0x50, 0xd6, 0x20, 0x49, 0xde, 0x71, 0xa0, 0xf9, 0xad, | |
| 40 0x20, 0x40, 0x12, 0xf1, 0xdd, 0x25, 0xeb, 0xd5, 0xe6, 0xb8, 0x36, 0xf4, 0xd6, | |
| 41 0x8f, 0x7f, 0xca, 0x43, 0xdc, 0xd7, 0x10, 0x5b, 0xe6, 0x3f, 0x51, 0x8a, 0x85, | |
| 42 0xb3, 0xf3, 0xff, 0xf6, 0x03, 0x2d, 0xcb, 0x23, 0x4f, 0x9c, 0xad, 0x18, 0xe7, | |
| 43 0x93, 0x05, 0x8c, 0xac, 0x52, 0x9a, 0xf7, 0x4c, 0xe9, 0x99, 0x7a, 0xbe, 0x6e, | |
| 44 0x7e, 0x4d, 0x0a, 0xe3, 0xc6, 0x1c, 0xa9, 0x93, 0xfa, 0x3a, 0xa5, 0x91, 0x5d, | |
| 45 0x1c, 0xbd, 0x66, 0xeb, 0xcc, 0x60, 0xdc, 0x86, 0x74, 0xca, 0xcf, 0xf8, 0x92, | |
| 46 0x1c, 0x98, 0x7d, 0x57, 0xfa, 0x61, 0x47, 0x9e, 0xab, 0x80, 0xb7, 0xe4, 0x48, | |
| 47 0x80, 0x2a, 0x92, 0xc5, 0x1b, 0x02, 0x03, 0x01, 0x00, 0x01 }; | |
| 48 | |
| 49 namespace { | |
| 50 | |
| 51 // Parses |pem_data| for a PEM block of |pem_type|. | |
| 52 // Returns true if a |pem_type| block is found, storing the decoded result in | |
| 53 // |der_output|. | |
| 54 bool GetDERFromPEM(const std::string& pem_data, | |
| 55 const std::string& pem_type, | |
| 56 std::string* der_output) { | |
| 57 std::vector<std::string> headers; | |
| 58 headers.push_back(pem_type); | |
| 59 net::PEMTokenizer pem_tok(pem_data, headers); | |
| 60 if (!pem_tok.GetNext()) { | |
| 61 return false; | |
| 62 } | |
| 63 | |
| 64 *der_output = pem_tok.data(); | |
| 65 return true; | |
| 66 } | |
| 67 | |
| 68 } // namespace | |
| 69 | |
| 70 NetworkingPrivateCrypto::NetworkingPrivateCrypto() {} | |
| 71 | |
| 72 NetworkingPrivateCrypto::~NetworkingPrivateCrypto() {} | |
| 73 | |
| 74 bool NetworkingPrivateCrypto::VerifyCredentials( | |
| 75 const std::string& certificate, | |
| 76 const std::string& signature, | |
| 77 const std::string& data, | |
| 78 const std::string& connected_mac) { | |
| 79 crypto::EnsureNSSInit(); | |
| 80 | |
| 81 std::string cert_data; | |
| 82 if (!GetDERFromPEM(certificate, "CERTIFICATE", &cert_data)) { | |
| 83 LOG(ERROR) << "Failed to parse certificate."; | |
| 84 return false; | |
| 85 } | |
| 86 SECItem der_cert; | |
| 87 der_cert.type = siDERCertBuffer; | |
| 88 der_cert.data = reinterpret_cast<unsigned char*>( | |
| 89 const_cast<char*>(cert_data.c_str())); | |
| 90 der_cert.len = cert_data.length(); | |
| 91 | |
| 92 // Parse into a certificate structure. | |
| 93 typedef scoped_ptr< | |
| 94 CERTCertificate, | |
| 95 crypto::NSSDestroyer<CERTCertificate, CERT_DestroyCertificate> > | |
| 96 ScopedCERTCertificate; | |
| 97 ScopedCERTCertificate cert(CERT_NewTempCertificate( | |
| 98 CERT_GetDefaultCertDB(), &der_cert, NULL, PR_FALSE, PR_TRUE)); | |
| 99 if (!cert.get()) { | |
| 100 LOG(ERROR) << "Failed to parse certificate."; | |
| 101 return false; | |
| 102 } | |
| 103 | |
| 104 // Check that the certificate is signed by trusted CA. | |
| 105 SECItem trusted_ca_key_der_item; | |
| 106 trusted_ca_key_der_item.type = siDERCertBuffer; | |
| 107 trusted_ca_key_der_item.data = const_cast<unsigned char*>( | |
| 108 kTrustedCAPublicKeyDER), | |
| 109 trusted_ca_key_der_item.len = sizeof(kTrustedCAPublicKeyDER); | |
| 110 crypto::ScopedSECKEYPublicKey ca_public_key( | |
| 111 SECKEY_ImportDERPublicKey(&trusted_ca_key_der_item, CKK_RSA)); | |
| 112 SECStatus verified = CERT_VerifySignedDataWithPublicKey( | |
| 113 &cert->signatureWrap, ca_public_key.get(), NULL); | |
| 114 if (verified != SECSuccess) { | |
| 115 LOG(ERROR) << "Certificate is not issued by the trusted CA."; | |
| 116 return false; | |
| 117 } | |
| 118 | |
| 119 // Check that the device listed in the certificate is correct. | |
| 120 // Something like evt_e161 001a11ffacdf | |
| 121 char* common_name = CERT_GetCommonName(&cert->subject); | |
| 122 if (!common_name) { | |
| 123 LOG(ERROR) << "Certificate does not have common name."; | |
| 124 return false; | |
| 125 } | |
| 126 | |
| 127 std::string subject_name(common_name); | |
| 128 PORT_Free(common_name); | |
| 129 std::string translated_mac; | |
| 130 base::RemoveChars(connected_mac, ":", &translated_mac); | |
| 131 if (!EndsWith(subject_name, translated_mac, false)) { | |
| 132 LOG(ERROR) << "MAC addresses don't match."; | |
| 133 return false; | |
| 134 } | |
| 135 | |
| 136 // Make sure that the certificate matches the unsigned data presented. | |
| 137 // Verify that the |signature| matches |data|. | |
| 138 crypto::ScopedSECKEYPublicKey public_key(CERT_ExtractPublicKey(cert.get())); | |
| 139 if (!public_key.get()) { | |
| 140 LOG(ERROR) << "Unable to extract public key from certificate."; | |
| 141 return false; | |
| 142 } | |
| 143 SECItem signature_item; | |
| 144 signature_item.type = siBuffer; | |
| 145 signature_item.data = reinterpret_cast<unsigned char*>( | |
| 146 const_cast<char*>(signature.c_str())); | |
| 147 signature_item.len = static_cast<unsigned int>(signature.size()); | |
| 148 verified = VFY_VerifyDataDirect(reinterpret_cast<unsigned char*>( | |
| 149 const_cast<char*>(data.c_str())), data.size(), | |
| 150 public_key.get(), &signature_item, SEC_OID_PKCS1_RSA_ENCRYPTION, | |
| 151 SEC_OID_SHA1, NULL, NULL); | |
| 152 if (verified != SECSuccess) { | |
| 153 LOG(ERROR) << "Signed blobs did not match."; | |
| 154 return false; | |
| 155 } | |
| 156 return true; | |
| 157 } | |
| 158 | |
| 159 bool NetworkingPrivateCrypto::EncryptByteString(const std::string& pub_key_der, | |
| 160 const std::string& data, | |
| 161 std::string* encrypted_output) { | |
| 162 crypto::EnsureNSSInit(); | |
| 163 | |
| 164 SECItem pub_key_der_item; | |
| 165 pub_key_der_item.type = siDERCertBuffer; | |
| 166 pub_key_der_item.data = reinterpret_cast<unsigned char*>( | |
| 167 const_cast<char*>(pub_key_der.c_str())); | |
| 168 pub_key_der_item.len = pub_key_der.size(); | |
| 169 | |
| 170 crypto::ScopedSECKEYPublicKey public_key(SECKEY_ImportDERPublicKey( | |
| 171 &pub_key_der_item, CKK_RSA)); | |
| 172 if (!public_key.get()) { | |
| 173 LOG(ERROR) << "Failed to parse public key."; | |
| 174 return false; | |
| 175 } | |
| 176 | |
| 177 size_t encrypted_length = SECKEY_PublicKeyStrength(public_key.get()); | |
| 178 // RSAES is defined as operating on messages up to a length of k - 11, where | |
| 179 // k is the octet length of the RSA modulus. | |
| 180 if (encrypted_length < data.size() + 11) { | |
| 181 LOG(ERROR) << "Too much data to encrypt."; | |
| 182 return false; | |
| 183 } | |
| 184 | |
| 185 scoped_ptr<unsigned char[]> rsa_output(new unsigned char[encrypted_length]); | |
| 186 SECStatus encrypted = PK11_PubEncryptPKCS1( | |
| 187 public_key.get(), | |
| 188 rsa_output.get(), | |
| 189 reinterpret_cast<unsigned char*>(const_cast<char*>(data.data())), | |
| 190 data.length(), | |
| 191 NULL); | |
| 192 if (encrypted != SECSuccess) { | |
| 193 LOG(ERROR) << "Error during encryption."; | |
| 194 return false; | |
| 195 } | |
| 196 encrypted_output->assign(reinterpret_cast<char*>(rsa_output.get()), | |
| 197 encrypted_length); | |
| 198 return true; | |
| 199 } | |
| 200 | |
| 201 bool NetworkingPrivateCrypto::DecryptByteString( | |
| 202 const std::string& private_key_pem, | |
| 203 const std::string& encrypted_data, | |
| 204 std::string* decrypted_output) { | |
| 205 crypto::EnsureNSSInit(); | |
| 206 | |
| 207 std::string private_key_der; | |
| 208 if (!GetDERFromPEM(private_key_pem, "PRIVATE KEY", &private_key_der)) { | |
| 209 LOG(ERROR) << "Failed to parse private key PEM."; | |
| 210 return false; | |
| 211 } | |
| 212 std::vector<uint8> private_key_data(private_key_der.begin(), | |
| 213 private_key_der.end()); | |
| 214 scoped_ptr<crypto::RSAPrivateKey> private_key( | |
| 215 crypto::RSAPrivateKey::CreateFromPrivateKeyInfo(private_key_data)); | |
| 216 if (!private_key || !private_key->public_key()) { | |
| 217 LOG(ERROR) << "Failed to parse private key DER."; | |
| 218 return false; | |
| 219 } | |
| 220 | |
| 221 size_t encrypted_length = SECKEY_SignatureLen(private_key->public_key()); | |
| 222 scoped_ptr<unsigned char[]> rsa_output(new unsigned char[encrypted_length]); | |
| 223 unsigned int output_length = 0; | |
| 224 SECStatus decrypted = | |
| 225 PK11_PrivDecryptPKCS1(private_key->key(), | |
| 226 rsa_output.get(), | |
| 227 &output_length, | |
| 228 encrypted_length, | |
| 229 reinterpret_cast<unsigned char*>( | |
| 230 const_cast<char*>(encrypted_data.data())), | |
| 231 encrypted_data.length()); | |
| 232 if (decrypted != SECSuccess) { | |
| 233 LOG(ERROR) << "Error during decryption."; | |
| 234 return false; | |
| 235 } | |
| 236 decrypted_output->assign(reinterpret_cast<char*>(rsa_output.get()), | |
| 237 output_length); | |
| 238 return true; | |
| 239 } | |
| 240 | |
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Chromium Code Reviews
Issue 102993002:
Implement Networking Private API VerifyAndEncryptCredentials method (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src