1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 * Copyright (C) 2017 Metrological Group B.V.
4 * Copyright (C) 2017 Igalia S.L.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "config.h"
29#include "GCryptUtilities.h"
30
31#include <wtf/Optional.h>
32
33namespace WebCore {
34
35Optional<const char*> hashAlgorithmName(CryptoAlgorithmIdentifier identifier)
36{
37 switch (identifier) {
38 case CryptoAlgorithmIdentifier::SHA_1:
39 return "sha1";
40 case CryptoAlgorithmIdentifier::SHA_224:
41 return "sha224";
42 case CryptoAlgorithmIdentifier::SHA_256:
43 return "sha256";
44 case CryptoAlgorithmIdentifier::SHA_384:
45 return "sha384";
46 case CryptoAlgorithmIdentifier::SHA_512:
47 return "sha512";
48 default:
49 return WTF::nullopt;
50 }
51}
52
53Optional<int> hmacAlgorithm(CryptoAlgorithmIdentifier identifier)
54{
55 switch (identifier) {
56 case CryptoAlgorithmIdentifier::SHA_1:
57 return GCRY_MAC_HMAC_SHA1;
58 case CryptoAlgorithmIdentifier::SHA_224:
59 return GCRY_MAC_HMAC_SHA224;
60 case CryptoAlgorithmIdentifier::SHA_256:
61 return GCRY_MAC_HMAC_SHA256;
62 case CryptoAlgorithmIdentifier::SHA_384:
63 return GCRY_MAC_HMAC_SHA384;
64 case CryptoAlgorithmIdentifier::SHA_512:
65 return GCRY_MAC_HMAC_SHA512;
66 default:
67 return WTF::nullopt;
68 }
69}
70
71Optional<int> digestAlgorithm(CryptoAlgorithmIdentifier identifier)
72{
73 switch (identifier) {
74 case CryptoAlgorithmIdentifier::SHA_1:
75 return GCRY_MD_SHA1;
76 case CryptoAlgorithmIdentifier::SHA_224:
77 return GCRY_MD_SHA224;
78 case CryptoAlgorithmIdentifier::SHA_256:
79 return GCRY_MD_SHA256;
80 case CryptoAlgorithmIdentifier::SHA_384:
81 return GCRY_MD_SHA384;
82 case CryptoAlgorithmIdentifier::SHA_512:
83 return GCRY_MD_SHA512;
84 default:
85 return WTF::nullopt;
86 }
87}
88
89Optional<PAL::CryptoDigest::Algorithm> hashCryptoDigestAlgorithm(CryptoAlgorithmIdentifier identifier)
90{
91 switch (identifier) {
92 case CryptoAlgorithmIdentifier::SHA_1:
93 return PAL::CryptoDigest::Algorithm::SHA_1;
94 case CryptoAlgorithmIdentifier::SHA_224:
95 return PAL::CryptoDigest::Algorithm::SHA_224;
96 case CryptoAlgorithmIdentifier::SHA_256:
97 return PAL::CryptoDigest::Algorithm::SHA_256;
98 case CryptoAlgorithmIdentifier::SHA_384:
99 return PAL::CryptoDigest::Algorithm::SHA_384;
100 case CryptoAlgorithmIdentifier::SHA_512:
101 return PAL::CryptoDigest::Algorithm::SHA_512;
102 default:
103 return WTF::nullopt;
104 }
105}
106
107Optional<size_t> mpiLength(gcry_mpi_t paramMPI)
108{
109 // Retrieve the MPI length for the unsigned format.
110 size_t dataLength = 0;
111 gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, nullptr, 0, &dataLength, paramMPI);
112 if (error != GPG_ERR_NO_ERROR) {
113 PAL::GCrypt::logError(error);
114 return WTF::nullopt;
115 }
116
117 return dataLength;
118}
119
120Optional<size_t> mpiLength(gcry_sexp_t paramSexp)
121{
122 // Retrieve the MPI value stored in the s-expression: (name mpi-data)
123 PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
124 if (!paramMPI)
125 return WTF::nullopt;
126
127 return mpiLength(paramMPI);
128}
129
130Optional<Vector<uint8_t>> mpiData(gcry_mpi_t paramMPI)
131{
132 // Retrieve the MPI length.
133 auto length = mpiLength(paramMPI);
134 if (!length)
135 return WTF::nullopt;
136
137 // Copy the MPI data into a properly-sized buffer.
138 Vector<uint8_t> output(*length);
139 gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, output.data(), output.size(), nullptr, paramMPI);
140 if (error != GPG_ERR_NO_ERROR) {
141 PAL::GCrypt::logError(error);
142 return WTF::nullopt;
143 }
144
145 return output;
146}
147
148Optional<Vector<uint8_t>> mpiZeroPrefixedData(gcry_mpi_t paramMPI, size_t targetLength)
149{
150 // Retrieve the MPI length. Bail if the retrieved length is longer than target length.
151 auto length = mpiLength(paramMPI);
152 if (!length || *length > targetLength)
153 return WTF::nullopt;
154
155 // Fill out the output buffer with zeros. Properly determine the zero prefix length,
156 // and copy the MPI data into memory area following the prefix (if any).
157 Vector<uint8_t> output(targetLength, 0);
158 size_t prefixLength = targetLength - *length;
159 gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, output.data() + prefixLength, targetLength, nullptr, paramMPI);
160 if (error != GPG_ERR_NO_ERROR) {
161 PAL::GCrypt::logError(error);
162 return WTF::nullopt;
163 }
164
165 return output;
166}
167
168Optional<Vector<uint8_t>> mpiData(gcry_sexp_t paramSexp)
169{
170 // Retrieve the MPI value stored in the s-expression: (name mpi-data)
171 PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
172 if (!paramMPI)
173 return WTF::nullopt;
174
175 return mpiData(paramMPI);
176}
177
178Optional<Vector<uint8_t>> mpiZeroPrefixedData(gcry_sexp_t paramSexp, size_t targetLength)
179{
180 // Retrieve the MPI value stored in the s-expression: (name mpi-data)
181 PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
182 if (!paramMPI)
183 return WTF::nullopt;
184
185 return mpiZeroPrefixedData(paramMPI, targetLength);
186}
187
188Optional<Vector<uint8_t>> mpiSignedData(gcry_mpi_t mpi)
189{
190 auto data = mpiData(mpi);
191 if (!data)
192 return WTF::nullopt;
193
194 if (data->at(0) & 0x80)
195 data->insert(0, 0x00);
196
197 return data;
198}
199
200Optional<Vector<uint8_t>> mpiSignedData(gcry_sexp_t paramSexp)
201{
202 auto data = mpiData(paramSexp);
203 if (!data)
204 return WTF::nullopt;
205
206 if (data->at(0) & 0x80)
207 data->insert(0, 0x00);
208
209 return data;
210}
211
212} // namespace WebCore
213