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
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_CERT_INTERNAL_SIGNATURE_ALGORITHM_H_
#define NET_CERT_INTERNAL_SIGNATURE_ALGORITHM_H_
#include <stdint.h>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "net/base/net_export.h"
namespace net {
namespace der {
class Input;
} // namespace der
// The digest algorithm used within a signature.
enum class DigestAlgorithm {
Sha1,
Sha256,
Sha384,
Sha512,
};
// The signature scheme used within a signature. Parameters are specified
// separately.
enum class SignatureAlgorithmId {
RsaPkcs1, // RSA PKCS#1 v1.5
RsaPss, // RSASSA-PSS
Ecdsa, // ECDSA
};
// Parses a HashAlgorithm as defined by RFC 5912:
//
// HashAlgorithm ::= AlgorithmIdentifier{DIGEST-ALGORITHM,
// {HashAlgorithms}}
//
// HashAlgorithms DIGEST-ALGORITHM ::= {
// { IDENTIFIER id-sha1 PARAMS TYPE NULL ARE preferredPresent } |
// { IDENTIFIER id-sha224 PARAMS TYPE NULL ARE preferredPresent } |
// { IDENTIFIER id-sha256 PARAMS TYPE NULL ARE preferredPresent } |
// { IDENTIFIER id-sha384 PARAMS TYPE NULL ARE preferredPresent } |
// { IDENTIFIER id-sha512 PARAMS TYPE NULL ARE preferredPresent }
// }
WARN_UNUSED_RESULT bool ParseHashAlgorithm(const der::Input input,
DigestAlgorithm* out);
// Base class for describing algorithm parameters.
class NET_EXPORT SignatureAlgorithmParameters {
public:
SignatureAlgorithmParameters() {}
virtual ~SignatureAlgorithmParameters(){};
private:
DISALLOW_COPY_AND_ASSIGN(SignatureAlgorithmParameters);
};
// Parameters for an RSASSA-PSS signature algorithm.
//
// The trailer is assumed to be 1 and the mask generation algorithm to be MGF1,
// as that is all that is implemented, and any other values while parsing the
// AlgorithmIdentifier will thus be rejected.
class NET_EXPORT RsaPssParameters : public SignatureAlgorithmParameters {
public:
RsaPssParameters(DigestAlgorithm mgf1_hash, uint32_t salt_length);
DigestAlgorithm mgf1_hash() const { return mgf1_hash_; }
uint32_t salt_length() const { return salt_length_; }
private:
const DigestAlgorithm mgf1_hash_;
const uint32_t salt_length_;
};
// SignatureAlgorithm describes a signature algorithm and its parameters. This
// corresponds to "AlgorithmIdentifier" from RFC 5280.
class NET_EXPORT SignatureAlgorithm {
public:
~SignatureAlgorithm();
SignatureAlgorithmId algorithm() const { return algorithm_; }
DigestAlgorithm digest() const { return digest_; }
// Creates a SignatureAlgorithm by parsing a DER-encoded "AlgorithmIdentifier"
// (RFC 5280). Returns nullptr on failure.
static scoped_ptr<SignatureAlgorithm> CreateFromDer(
const der::Input& algorithm_identifier);
// Creates a new SignatureAlgorithm with the given type and parameters.
static scoped_ptr<SignatureAlgorithm> CreateRsaPkcs1(DigestAlgorithm digest);
static scoped_ptr<SignatureAlgorithm> CreateEcdsa(DigestAlgorithm digest);
static scoped_ptr<SignatureAlgorithm> CreateRsaPss(DigestAlgorithm digest,
DigestAlgorithm mgf1_hash,
uint32_t salt_length);
// The following methods retrieve the parameters for the signature algorithm.
//
// The correct parameters should be chosen based on the algorithm ID. For
// instance a SignatureAlgorithm with |algorithm() == RsaPss| should retrieve
// parameters via ParametersForRsaPss().
//
// The returned pointer is non-owned, and has the same lifetime as |this|.
const RsaPssParameters* ParamsForRsaPss() const;
private:
SignatureAlgorithm(SignatureAlgorithmId algorithm,
DigestAlgorithm digest,
scoped_ptr<SignatureAlgorithmParameters> params);
const SignatureAlgorithmId algorithm_;
const DigestAlgorithm digest_;
const scoped_ptr<SignatureAlgorithmParameters> params_;
DISALLOW_COPY_AND_ASSIGN(SignatureAlgorithm);
};
} // namespace net
#endif // NET_CERT_INTERNAL_SIGNATURE_ALGORITHM_H_
|
