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
|
// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
///////////////////////////////////////////////////////////////////////////////
#include "tink/subtle/ecdsa_sign_boringssl.h"
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "absl/status/status.h"
#include "openssl/evp.h"
#include "tink/internal/md_util.h"
#include "tink/internal/util.h"
#include "tink/signature/internal/ecdsa_raw_sign_boringssl.h"
#include "tink/subtle/common_enums.h"
#include "tink/subtle/subtle_util_boringssl.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
namespace subtle {
util::StatusOr<std::unique_ptr<EcdsaSignBoringSsl>> EcdsaSignBoringSsl::New(
const SubtleUtilBoringSSL::EcKey& ec_key, HashType hash_type,
EcdsaSignatureEncoding encoding) {
auto status = internal::CheckFipsCompatibility<EcdsaSignBoringSsl>();
if (!status.ok()) return status;
// Check if the hash type is safe to use.
util::Status is_safe = internal::IsHashTypeSafeForSignature(hash_type);
if (!is_safe.ok()) {
return is_safe;
}
util::StatusOr<const EVP_MD*> hash = internal::EvpHashFromHashType(hash_type);
if (!hash.ok()) {
return hash.status();
}
util::StatusOr<std::unique_ptr<internal::EcdsaRawSignBoringSsl>> raw_sign =
internal::EcdsaRawSignBoringSsl::New(ec_key, encoding);
if (!raw_sign.ok()) return raw_sign.status();
return {
absl::WrapUnique(new EcdsaSignBoringSsl(*hash, std::move(*raw_sign)))};
}
util::StatusOr<std::string> EcdsaSignBoringSsl::Sign(
absl::string_view data) const {
// BoringSSL expects a non-null pointer for data,
// regardless of whether the size is 0.
data = internal::EnsureStringNonNull(data);
// Compute the digest.
unsigned int digest_size;
uint8_t digest[EVP_MAX_MD_SIZE];
if (1 != EVP_Digest(data.data(), data.size(), digest, &digest_size, hash_,
nullptr)) {
return util::Status(absl::StatusCode::kInternal,
"Could not compute digest.");
}
// Compute the signature.
return raw_signer_->Sign(
absl::string_view(reinterpret_cast<char*>(digest), digest_size));
}
} // namespace subtle
} // namespace tink
} // namespace crypto
|
