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Side by Side Diff: net/quic/crypto/channel_id.cc

Issue 2193073003: Move shared files in net/quic/ into net/quic/core/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: io_thread_unittest.cc Created 4 years, 4 months ago
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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 "net/quic/crypto/channel_id.h"
6
7 #include <openssl/bn.h>
8 #include <openssl/ec.h>
9 #include <openssl/ecdsa.h>
10 #include <openssl/obj_mac.h>
11 #include <openssl/sha.h>
12
13 #include "crypto/openssl_util.h"
14 #include "crypto/scoped_openssl_types.h"
15
16 using base::StringPiece;
17
18 namespace net {
19
20 // static
21 const char ChannelIDVerifier::kContextStr[] = "QUIC ChannelID";
22 // static
23 const char ChannelIDVerifier::kClientToServerStr[] = "client -> server";
24
25 // static
26 bool ChannelIDVerifier::Verify(StringPiece key,
27 StringPiece signed_data,
28 StringPiece signature) {
29 return VerifyRaw(key, signed_data, signature, true);
30 }
31
32 // static
33 bool ChannelIDVerifier::VerifyRaw(StringPiece key,
34 StringPiece signed_data,
35 StringPiece signature,
36 bool is_channel_id_signature) {
37 if (key.size() != 32 * 2 || signature.size() != 32 * 2) {
38 return false;
39 }
40
41 crypto::ScopedEC_GROUP p256(EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1));
42 if (!p256) {
43 return false;
44 }
45
46 crypto::ScopedBIGNUM x(BN_new()), y(BN_new()), r(BN_new()), s(BN_new());
47
48 ECDSA_SIG sig;
49 sig.r = r.get();
50 sig.s = s.get();
51
52 const uint8_t* key_bytes = reinterpret_cast<const uint8_t*>(key.data());
53 const uint8_t* signature_bytes =
54 reinterpret_cast<const uint8_t*>(signature.data());
55
56 if (BN_bin2bn(key_bytes + 0, 32, x.get()) == nullptr ||
57 BN_bin2bn(key_bytes + 32, 32, y.get()) == nullptr ||
58 BN_bin2bn(signature_bytes + 0, 32, sig.r) == nullptr ||
59 BN_bin2bn(signature_bytes + 32, 32, sig.s) == nullptr) {
60 return false;
61 }
62
63 crypto::ScopedEC_POINT point(EC_POINT_new(p256.get()));
64 if (!point ||
65 !EC_POINT_set_affine_coordinates_GFp(p256.get(), point.get(), x.get(),
66 y.get(), nullptr)) {
67 return false;
68 }
69
70 crypto::ScopedEC_KEY ecdsa_key(EC_KEY_new());
71 if (ecdsa_key.get() == nullptr ||
72 !EC_KEY_set_group(ecdsa_key.get(), p256.get()) ||
73 !EC_KEY_set_public_key(ecdsa_key.get(), point.get())) {
74 return false;
75 }
76
77 SHA256_CTX sha256;
78 SHA256_Init(&sha256);
79 if (is_channel_id_signature) {
80 SHA256_Update(&sha256, kContextStr, strlen(kContextStr) + 1);
81 SHA256_Update(&sha256, kClientToServerStr, strlen(kClientToServerStr) + 1);
82 }
83 SHA256_Update(&sha256, signed_data.data(), signed_data.size());
84
85 unsigned char digest[SHA256_DIGEST_LENGTH];
86 SHA256_Final(digest, &sha256);
87
88 return ECDSA_do_verify(digest, sizeof(digest), &sig, ecdsa_key.get()) == 1;
89 }
90
91 } // namespace net
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