1 // Copyright 2013 The Chromium Authors
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/test/ct_test_util.h"
6 
7 #include <stdint.h>
8 #include <string.h>
9 #include <vector>
10 
11 #include "base/base64.h"
12 #include "base/strings/string_number_conversions.h"
13 #include "base/strings/string_piece.h"
14 #include "base/strings/string_util.h"
15 #include "base/strings/stringprintf.h"
16 #include "net/base/hex_utils.h"
17 #include "net/cert/ct_serialization.h"
18 #include "net/cert/merkle_tree_leaf.h"
19 #include "net/cert/signed_tree_head.h"
20 #include "net/cert/x509_certificate.h"
21 
22 namespace net::ct {
23 
24 namespace {
25 
26 // The following test vectors are from
27 // http://code.google.com/p/certificate-transparency
28 
29 const char kDefaultDerCert[] =
30     "308202ca30820233a003020102020106300d06092a864886f70d01010505003055310b3009"
31     "06035504061302474231243022060355040a131b4365727469666963617465205472616e73"
32     "706172656e6379204341310e300c0603550408130557616c65733110300e06035504071307"
33     "4572772057656e301e170d3132303630313030303030305a170d3232303630313030303030"
34     "305a3052310b30090603550406130247423121301f060355040a1318436572746966696361"
35     "7465205472616e73706172656e6379310e300c0603550408130557616c65733110300e0603"
36     "55040713074572772057656e30819f300d06092a864886f70d010101050003818d00308189"
37     "02818100b1fa37936111f8792da2081c3fe41925008531dc7f2c657bd9e1de4704160b4c9f"
38     "19d54ada4470404c1c51341b8f1f7538dddd28d9aca48369fc5646ddcc7617f8168aae5b41"
39     "d43331fca2dadfc804d57208949061f9eef902ca47ce88c644e000f06eeeccabdc9dd2f68a"
40     "22ccb09dc76e0dbc73527765b1a37a8c676253dcc10203010001a381ac3081a9301d060355"
41     "1d0e041604146a0d982a3b62c44b6d2ef4e9bb7a01aa9cb798e2307d0603551d2304763074"
42     "80145f9d880dc873e654d4f80dd8e6b0c124b447c355a159a4573055310b30090603550406"
43     "1302474231243022060355040a131b4365727469666963617465205472616e73706172656e"
44     "6379204341310e300c0603550408130557616c65733110300e060355040713074572772057"
45     "656e82010030090603551d1304023000300d06092a864886f70d010105050003818100171c"
46     "d84aac414a9a030f22aac8f688b081b2709b848b4e5511406cd707fed028597a9faefc2eee"
47     "2978d633aaac14ed3235197da87e0f71b8875f1ac9e78b281749ddedd007e3ecf50645f8cb"
48     "f667256cd6a1647b5e13203bb8582de7d6696f656d1c60b95f456b7fcf338571908f1c6972"
49     "7d24c4fccd249295795814d1dac0e6";
50 
51 const char kDefaultIssuerKeyHash[] =
52     "02adddca08b8bf9861f035940c940156d8350fdff899a6239c6bd77255b8f8fc";
53 
54 const char kDefaultDerTbsCert[] =
55     "30820233a003020102020107300d06092a864886f70d01010505003055310b300906035504"
56     "061302474231243022060355040a131b4365727469666963617465205472616e7370617265"
57     "6e6379204341310e300c0603550408130557616c65733110300e0603550407130745727720"
58     "57656e301e170d3132303630313030303030305a170d3232303630313030303030305a3052"
59     "310b30090603550406130247423121301f060355040a131843657274696669636174652054"
60     "72616e73706172656e6379310e300c0603550408130557616c65733110300e060355040713"
61     "074572772057656e30819f300d06092a864886f70d010101050003818d0030818902818100"
62     "beef98e7c26877ae385f75325a0c1d329bedf18faaf4d796bf047eb7e1ce15c95ba2f80ee4"
63     "58bd7db86f8a4b252191a79bd700c38e9c0389b45cd4dc9a120ab21e0cb41cd0e72805a410"
64     "cd9c5bdb5d4927726daf1710f60187377ea25b1a1e39eed0b88119dc154dc68f7da8e30caf"
65     "158a33e6c9509f4a05b01409ff5dd87eb50203010001a381ac3081a9301d0603551d0e0416"
66     "04142031541af25c05ffd8658b6843794f5e9036f7b4307d0603551d230476307480145f9d"
67     "880dc873e654d4f80dd8e6b0c124b447c355a159a4573055310b3009060355040613024742"
68     "31243022060355040a131b4365727469666963617465205472616e73706172656e63792043"
69     "41310e300c0603550408130557616c65733110300e060355040713074572772057656e8201"
70     "0030090603551d1304023000";
71 
72 const char kDefaultExtensions[] = "666f6f626172"; // "foobar"
73 
74 const char kTestDigitallySigned[] =
75     "0403004730450220606e10ae5c2d5a1b0aed49dc4937f48de71a4e9784e9c208dfbfe9ef53"
76     "6cf7f2022100beb29c72d7d06d61d06bdb38a069469aa86fe12e18bb7cc45689a2c0187ef5"
77     "a5";
78 
79 const char kTestSignedCertificateTimestamp[] =
80     "00df1c2ec11500945247a96168325ddc5c7959e8f7c6d388fc002e0bbd3f74d7640000013d"
81     "db27ded900000403004730450220606e10ae5c2d5a1b0aed49dc4937f48de71a4e9784e9c2"
82     "08dfbfe9ef536cf7f2022100beb29c72d7d06d61d06bdb38a069469aa86fe12e18bb7cc456"
83     "89a2c0187ef5a5";
84 
85 const char kEcP256PublicKey[] =
86     "3059301306072a8648ce3d020106082a8648ce3d0301070342000499783cb14533c0161a5a"
87     "b45bf95d08a29cd0ea8dd4c84274e2be59ad15c676960cf0afa1074a57ac644b23479e5b3f"
88     "b7b245eb4b420ef370210371a944beaceb";
89 
90 const char kTestKeyId[] =
91     "df1c2ec11500945247a96168325ddc5c7959e8f7c6d388fc002e0bbd3f74d764";
92 
93 const int64_t kTestTimestamp = INT64_C(1396877277237);
94 
95 const char kTestSCTSignatureData[] =
96     "30450220606e10ae5c2d5a1b0aed49dc4937f48de71a4e9784e9c208dfbfe9ef536cf7f202"
97     "2100beb29c72d7d06d61d06bdb38a069469aa86fe12e18bb7cc45689a2c0187ef5a5";
98 
99 const char kTestSCTPrecertSignatureData[] =
100     "30450220482f6751af35dba65436be1fd6640f3dbf9a41429495924530288fa3e5e23e0602"
101     "2100e4edc0db3ac572b1e2f5e8ab6a680653987dcf41027dfeffa105519d89edbf08";
102 
103 // A well-formed OCSP response with fake SCT contents. Does not come from
104 // http://code.google.com/p/certificate-transparency, does not pertain to any
105 // of the test certs here, and is only used to test extracting the extension
106 // contents from the response.
107 const char kFakeOCSPResponse[] =
108     "3082016e0a0100a08201673082016306092b060105050730010104820154308201503081ba"
109     "a21604144edfdf5ff9c90ffacfca66e7fbc436bc39ee3fc7180f3230313030313031303630"
110     "3030305a30818e30818b3049300906052b0e03021a050004141833a1e6a4f09577cca0e64c"
111     "e7d145ca4b93700904144edfdf5ff9c90ffacfca66e7fbc436bc39ee3fc7021001aef99bde"
112     "e0bb58c6f2b816bc3ae02f8000180f32303130303130313036303030305aa011180f323033"
113     "30303130313036303030305aa11830163014060a2b06010401d67902040504060404746573"
114     "74300d06092a864886f70d0101050500038181003586ffcf0794e64eb643d52a3d570a1c93"
115     "836395986a2f792dd4e9c70b05161186c55c1658e0607dc9ec0d0924ac37fb99506c870579"
116     "634be1de62ba2fced5f61f3b428f959fcee9bddf6f268c8e14c14fdf3b447786e638a5c8cc"
117     "b610893df17a60e4cff30f4780aeffe0086ef19910f0d9cd7414bc93d1945686f88ad0a3c3"
118     ;
119 
120 const char kFakeOCSPResponseCert[] =
121     "3082022930820192a003020102021001aef99bdee0bb58c6f2b816bc3ae02f300d06092a86"
122     "4886f70d01010505003015311330110603550403130a54657374696e67204341301e170d31"
123     "30303130313036303030305a170d3332313230313036303030305a30373112301006035504"
124     "0313093132372e302e302e31310b300906035504061302585831143012060355040a130b54"
125     "657374696e67204f726730819d300d06092a864886f70d010101050003818b003081870281"
126     "8100a71998f2930bfe73d031a87f133d2f378eeeeed52a77e44d0fc9ff6f07ff32cbf3da99"
127     "9de4ed65832afcb0807f98787506539d258a0ce3c2c77967653099a9034a9b115a876c39a8"
128     "c4e4ed4acd0c64095946fb39eeeb47a0704dbb018acf48c3a1c4b895fc409fb4a340a986b1"
129     "afc45519ab9eca47c30185c771c64aa5ecf07d020103a35a3058303a06082b060105050701"
130     "01010100042b3029302706082b06010505073001861b687474703a2f2f3132372e302e302e"
131     "313a35353038312f6f637370301a0603551d200101000410300e300c060a2b06010401d679"
132     "020401300d06092a864886f70d01010505000381810065e04fadd3484197f3412479d917e1"
133     "9d8f7db57b526f2d0e4c046f86cebe643bf568ea0cd6570b228842aa057c6a7c79f209dfcd"
134     "3419a4d93b1ecfb1c0224f33083c7d4da023499fbd00d81d6711ad58ffcf65f1545247fe9d"
135     "83203425fd706b4fc5e797002af3d88151be5901eef56ec30aacdfc404be1bd35865ff1943"
136     "2516";
137 
138 const char kFakeOCSPResponseIssuerCert[] =
139     "308201d13082013aa003020102020101300d06092a864886f70d0101050500301531133011"
140     "0603550403130a54657374696e67204341301e170d3130303130313036303030305a170d33"
141     "32313230313036303030305a3015311330110603550403130a54657374696e672043413081"
142     "9d300d06092a864886f70d010101050003818b0030818702818100a71998f2930bfe73d031"
143     "a87f133d2f378eeeeed52a77e44d0fc9ff6f07ff32cbf3da999de4ed65832afcb0807f9878"
144     "7506539d258a0ce3c2c77967653099a9034a9b115a876c39a8c4e4ed4acd0c64095946fb39"
145     "eeeb47a0704dbb018acf48c3a1c4b895fc409fb4a340a986b1afc45519ab9eca47c30185c7"
146     "71c64aa5ecf07d020103a333303130120603551d130101ff040830060101ff020100301b06"
147     "03551d200101000411300f300d060b2b06010401d6790201ce0f300d06092a864886f70d01"
148     "01050500038181003f4936f8d00e83fbdde331f2c64335dcf7dec8b1a2597683edeed61af0"
149     "fa862412fad848938fe7ab77f1f9a43671ff6fdb729386e26f49e7aca0c0ea216e5970d933"
150     "3ea1e11df2ccb357a5fed5220f9c6239e8946b9b7517707631d51ab996833d58a022cff5a6"
151     "2169ac9258ec110efee78da9ab4a641e3b3c9ee5e8bd291460";
152 
153 const char kFakeOCSPExtensionValue[] = "74657374";  // "test"
154 
155 // For the sample STH
156 const char kSampleSTHSHA256RootHash[] =
157     "726467216167397babca293dca398e4ce6b621b18b9bc42f30c900d1f92ac1e4";
158 const char kSampleSTHTreeHeadSignature[] =
159     "0403004730450220365a91a2a88f2b9332f41d8959fa7086da7e6d634b7b089bc9da066426"
160     "6c7a20022100e38464f3c0fd066257b982074f7ac87655e0c8f714768a050b4be9a7b441cb"
161     "d3";
162 size_t kSampleSTHTreeSize = 21u;
163 
164 }  // namespace
165 
GetX509CertSignedEntry(SignedEntryData * entry)166 void GetX509CertSignedEntry(SignedEntryData* entry) {
167   entry->type = ct::SignedEntryData::LOG_ENTRY_TYPE_X509;
168   entry->leaf_certificate = HexDecode(kDefaultDerCert);
169 }
170 
GetX509CertTreeLeaf(MerkleTreeLeaf * tree_leaf)171 void GetX509CertTreeLeaf(MerkleTreeLeaf* tree_leaf) {
172   tree_leaf->timestamp = base::Time::FromJsTime(kTestTimestamp);
173   GetX509CertSignedEntry(&tree_leaf->signed_entry);
174   tree_leaf->extensions = HexDecode(kDefaultExtensions);
175 }
176 
GetDerEncodedX509Cert()177 std::string GetDerEncodedX509Cert() {
178   return HexDecode(kDefaultDerCert);
179 }
180 
GetPrecertSignedEntry(SignedEntryData * entry)181 void GetPrecertSignedEntry(SignedEntryData* entry) {
182   entry->type = ct::SignedEntryData::LOG_ENTRY_TYPE_PRECERT;
183   std::string issuer_hash(HexDecode(kDefaultIssuerKeyHash));
184   memcpy(entry->issuer_key_hash.data, issuer_hash.data(), issuer_hash.size());
185   entry->tbs_certificate = HexDecode(kDefaultDerTbsCert);
186 }
187 
GetPrecertTreeLeaf(MerkleTreeLeaf * tree_leaf)188 void GetPrecertTreeLeaf(MerkleTreeLeaf* tree_leaf) {
189   tree_leaf->timestamp = base::Time::FromJsTime(kTestTimestamp);
190   GetPrecertSignedEntry(&tree_leaf->signed_entry);
191   tree_leaf->extensions = HexDecode(kDefaultExtensions);
192 }
193 
GetTestDigitallySigned()194 std::string GetTestDigitallySigned() {
195   return HexDecode(kTestDigitallySigned);
196 }
197 
GetTestSignedCertificateTimestamp()198 std::string GetTestSignedCertificateTimestamp() {
199   return HexDecode(kTestSignedCertificateTimestamp);
200 }
201 
GetTestPublicKey()202 std::string GetTestPublicKey() {
203   return HexDecode(kEcP256PublicKey);
204 }
205 
GetTestPublicKeyId()206 std::string GetTestPublicKeyId() {
207   return HexDecode(kTestKeyId);
208 }
209 
GetX509CertSCT(scoped_refptr<SignedCertificateTimestamp> * sct_ref)210 void GetX509CertSCT(scoped_refptr<SignedCertificateTimestamp>* sct_ref) {
211   CHECK(sct_ref != nullptr);
212   *sct_ref = base::MakeRefCounted<SignedCertificateTimestamp>();
213   SignedCertificateTimestamp *const sct(sct_ref->get());
214   sct->version = ct::SignedCertificateTimestamp::V1;
215   sct->log_id = HexDecode(kTestKeyId);
216   // Time the log issued a SCT for this certificate, which is
217   // Fri Apr  5 10:04:16.089 2013
218   sct->timestamp =
219       base::Time::UnixEpoch() + base::Milliseconds(INT64_C(1365181456089));
220   sct->extensions.clear();
221 
222   sct->signature.hash_algorithm = ct::DigitallySigned::HASH_ALGO_SHA256;
223   sct->signature.signature_algorithm = ct::DigitallySigned::SIG_ALGO_ECDSA;
224   sct->signature.signature_data = HexDecode(kTestSCTSignatureData);
225 }
226 
GetPrecertSCT(scoped_refptr<SignedCertificateTimestamp> * sct_ref)227 void GetPrecertSCT(scoped_refptr<SignedCertificateTimestamp>* sct_ref) {
228   CHECK(sct_ref != nullptr);
229   *sct_ref = base::MakeRefCounted<SignedCertificateTimestamp>();
230   SignedCertificateTimestamp *const sct(sct_ref->get());
231   sct->version = ct::SignedCertificateTimestamp::V1;
232   sct->log_id = HexDecode(kTestKeyId);
233   // Time the log issued a SCT for this Precertificate, which is
234   // Fri Apr  5 10:04:16.275 2013
235   sct->timestamp =
236       base::Time::UnixEpoch() + base::Milliseconds(INT64_C(1365181456275));
237   sct->extensions.clear();
238 
239   sct->signature.hash_algorithm = ct::DigitallySigned::HASH_ALGO_SHA256;
240   sct->signature.signature_algorithm = ct::DigitallySigned::SIG_ALGO_ECDSA;
241   sct->signature.signature_data = HexDecode(kTestSCTPrecertSignatureData);
242 }
243 
GetDefaultIssuerKeyHash()244 std::string GetDefaultIssuerKeyHash() {
245   return HexDecode(kDefaultIssuerKeyHash);
246 }
247 
GetDerEncodedFakeOCSPResponse()248 std::string GetDerEncodedFakeOCSPResponse() {
249   return HexDecode(kFakeOCSPResponse);
250 }
251 
GetFakeOCSPExtensionValue()252 std::string GetFakeOCSPExtensionValue() {
253   return HexDecode(kFakeOCSPExtensionValue);
254 }
255 
GetDerEncodedFakeOCSPResponseCert()256 std::string GetDerEncodedFakeOCSPResponseCert() {
257   return HexDecode(kFakeOCSPResponseCert);
258 }
259 
GetDerEncodedFakeOCSPResponseIssuerCert()260 std::string GetDerEncodedFakeOCSPResponseIssuerCert() {
261   return HexDecode(kFakeOCSPResponseIssuerCert);
262 }
263 
264 // A sample, valid STH
GetSampleSignedTreeHead(SignedTreeHead * sth)265 bool GetSampleSignedTreeHead(SignedTreeHead* sth) {
266   sth->version = SignedTreeHead::V1;
267   sth->timestamp = base::Time::UnixEpoch() + base::Milliseconds(kTestTimestamp);
268   sth->tree_size = kSampleSTHTreeSize;
269   std::string sha256_root_hash = GetSampleSTHSHA256RootHash();
270   memcpy(sth->sha256_root_hash, sha256_root_hash.c_str(), kSthRootHashLength);
271   sth->log_id = GetTestPublicKeyId();
272 
273   return GetSampleSTHTreeHeadDecodedSignature(&(sth->signature));
274 }
275 
GetSampleEmptySignedTreeHead(SignedTreeHead * sth)276 bool GetSampleEmptySignedTreeHead(SignedTreeHead* sth) {
277   sth->version = SignedTreeHead::V1;
278   sth->timestamp =
279       base::Time::UnixEpoch() + base::Milliseconds(INT64_C(1450443594920));
280   sth->tree_size = 0;
281   std::string empty_root_hash = HexDecode(
282       "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
283   memcpy(sth->sha256_root_hash, empty_root_hash.c_str(), kSthRootHashLength);
284   sth->log_id = GetTestPublicKeyId();
285 
286   std::string tree_head_signature = HexDecode(
287       "040300463044022046c26401de9416403da54762dc1f1687c38eafd791b15e484ab4c5f7"
288       "f52721fe02201bf537a3bbea47109fc76c2273fe0f3349f493a07de9335c266330105fb0"
289       "2a4a");
290   base::StringPiece sp(tree_head_signature);
291   return DecodeDigitallySigned(&sp, &(sth->signature)) && sp.empty();
292 }
293 
GetBadEmptySignedTreeHead(SignedTreeHead * sth)294 bool GetBadEmptySignedTreeHead(SignedTreeHead* sth) {
295   sth->version = SignedTreeHead::V1;
296   sth->timestamp =
297       base::Time::UnixEpoch() + base::Milliseconds(INT64_C(1450870952897));
298   sth->tree_size = 0;
299   memset(sth->sha256_root_hash, 'f', kSthRootHashLength);
300   sth->log_id = GetTestPublicKeyId();
301 
302   std::string tree_head_signature = HexDecode(
303       "04030046304402207cab04c62dee5d1cbc95fec30cd8417313f71587b75f133ad2e6f324"
304       "74f164d702205e2f3a9bce46f87d7e20e951a4e955da3cb502f8717a22fabd7c5d7e1bef"
305       "46ea");
306   base::StringPiece sp(tree_head_signature);
307   return DecodeDigitallySigned(&sp, &(sth->signature)) && sp.empty();
308 }
309 
GetSampleSTHSHA256RootHash()310 std::string GetSampleSTHSHA256RootHash() {
311   return HexDecode(kSampleSTHSHA256RootHash);
312 }
313 
GetSampleSTHTreeHeadSignature()314 std::string GetSampleSTHTreeHeadSignature() {
315   return HexDecode(kSampleSTHTreeHeadSignature);
316 }
317 
GetSampleSTHTreeHeadDecodedSignature(DigitallySigned * signature)318 bool GetSampleSTHTreeHeadDecodedSignature(DigitallySigned* signature) {
319   std::string tree_head_signature = HexDecode(kSampleSTHTreeHeadSignature);
320   base::StringPiece sp(tree_head_signature);
321   return DecodeDigitallySigned(&sp, signature) && sp.empty();
322 }
323 
GetSampleSTHAsJson()324 std::string GetSampleSTHAsJson() {
325   return CreateSignedTreeHeadJsonString(kSampleSTHTreeSize, kTestTimestamp,
326                                         GetSampleSTHSHA256RootHash(),
327                                         GetSampleSTHTreeHeadSignature());
328 }
329 
CreateSignedTreeHeadJsonString(size_t tree_size,int64_t timestamp,std::string sha256_root_hash,std::string tree_head_signature)330 std::string CreateSignedTreeHeadJsonString(size_t tree_size,
331                                            int64_t timestamp,
332                                            std::string sha256_root_hash,
333                                            std::string tree_head_signature) {
334   std::string sth_json =
335       std::string("{\"tree_size\":") + base::NumberToString(tree_size) +
336       std::string(",\"timestamp\":") + base::NumberToString(timestamp);
337 
338   if (!sha256_root_hash.empty()) {
339     std::string root_hash_b64;
340     base::Base64Encode(sha256_root_hash, &root_hash_b64);
341     sth_json += base::StringPrintf(",\"sha256_root_hash\":\"%s\"",
342                                    root_hash_b64.c_str());
343   }
344   if (!tree_head_signature.empty()) {
345     std::string tree_head_signature_b64;
346     base::Base64Encode(tree_head_signature, &tree_head_signature_b64);
347     sth_json += base::StringPrintf(",\"tree_head_signature\":\"%s\"",
348                                    tree_head_signature_b64.c_str());
349   }
350 
351   sth_json += "}";
352   return sth_json;
353 }
354 
CreateConsistencyProofJsonString(const std::vector<std::string> & raw_nodes)355 std::string CreateConsistencyProofJsonString(
356     const std::vector<std::string>& raw_nodes) {
357   std::string consistency_proof_json = std::string("{\"consistency\":[");
358 
359   for (auto it = raw_nodes.begin(); it != raw_nodes.end(); ++it) {
360     std::string proof_node_b64;
361     base::Base64Encode(*it, &proof_node_b64);
362     consistency_proof_json +=
363         base::StringPrintf("\"%s\"", proof_node_b64.c_str());
364     if (it + 1 != raw_nodes.end())
365       consistency_proof_json += std::string(",");
366   }
367   consistency_proof_json += std::string("]}");
368 
369   return consistency_proof_json;
370 }
371 
GetSCTListForTesting()372 std::string GetSCTListForTesting() {
373   const std::string sct = ct::GetTestSignedCertificateTimestamp();
374   std::string sct_list;
375   ct::EncodeSCTListForTesting(sct, &sct_list);
376   return sct_list;
377 }
378 
GetSCTListWithInvalidSCT()379 std::string GetSCTListWithInvalidSCT() {
380   std::string sct(ct::GetTestSignedCertificateTimestamp());
381 
382   // Change a byte inside the Log ID part of the SCT so it does not match the
383   // log used in the tests.
384   sct[15] = 't';
385 
386   std::string sct_list;
387   ct::EncodeSCTListForTesting(sct, &sct_list);
388   return sct_list;
389 }
390 
CheckForSingleVerifiedSCTInResult(const SignedCertificateTimestampAndStatusList & scts,const std::string & log_description)391 bool CheckForSingleVerifiedSCTInResult(
392     const SignedCertificateTimestampAndStatusList& scts,
393     const std::string& log_description) {
394   return (scts.size() == 1 && scts[0].status == ct::SCT_STATUS_OK &&
395           scts[0].sct->log_description == log_description);
396 }
397 
CheckForSCTOrigin(const SignedCertificateTimestampAndStatusList & scts,ct::SignedCertificateTimestamp::Origin origin)398 bool CheckForSCTOrigin(const SignedCertificateTimestampAndStatusList& scts,
399                        ct::SignedCertificateTimestamp::Origin origin) {
400   for (const auto& sct_and_status : scts)
401     if (sct_and_status.status == SCT_STATUS_OK &&
402         sct_and_status.sct->origin == origin)
403       return true;
404 
405   return false;
406 }
407 
408 }  // namespace net::ct
409