951586380

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Build # 951586380

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push

gitlab-ci

Committed by

kacf

Commit Message

chore: Use system reboot command when `Automatic` reboot is requested.

I won't add tests for this, because it is much better to test this
properly later when we get our acceptance tests running. It will be
untested till then...

Signed-off-by: Kristian Amlie <kristian.amlie@northern.tech>

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78.38

/common/crypto/platform/openssl/crypto.cpp

// Copyright 2023 Northern.tech AS
//
//    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 <common/crypto.hpp>

#include <cstdint>
#include <string>
#include <vector>
#include <memory>

#include <common/io.hpp>
#include <common/error.hpp>
#include <common/expected.hpp>
#include <common/common.hpp>

#include <artifact/sha/sha.hpp>

#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/rsa.h>


namespace mender {
namespace common {
namespace crypto {

const size_t MENDER_DIGEST_SHA256_LENGTH = 32;

const size_t OPENSSL_SUCCESS = 1;

using namespace std;

namespace error = mender::common::error;
namespace io = mender::common::io;

auto pkey_ctx_free_func = [](EVP_PKEY_CTX *ctx) {
        if (ctx) {
                EVP_PKEY_CTX_free(ctx);
        }
};
auto pkey_free_func = [](EVP_PKEY *key) {
        if (key) {
                EVP_PKEY_free(key);
        }
};
auto bio_free_func = [](BIO *bio) {
        if (bio) {
                BIO_free(bio);
        }
};
auto bio_free_all_func = [](BIO *bio) {
        if (bio) {
                BIO_free_all(bio);
        }
};

expected::ExpectedString EncodeBase64(vector<uint8_t> to_encode) {
        // Predict the len of the decoded for later verification. From man page:
        // For every 3 bytes of input provided 4 bytes of output
        // data will be produced. If n is not divisible by 3 (...)
        // the output is padded such that it is always divisible by 4.
        const auto predicted_len = 4 * ((to_encode.size() + 2) / 3);

        // Add space for a NUL terminator. From man page:
        // Additionally a NUL terminator character will be added
        auto buffer {vector<unsigned char>(predicted_len + 1)};

        const auto output_len =
                EVP_EncodeBlock(buffer.data(), to_encode.data(), static_cast<int>(to_encode.size()));

        if (predicted_len != static_cast<unsigned long>(output_len)) {
                return expected::unexpected(
                        MakeError(Base64Error, "The predicted and the actual length differ"));
        }

        return string(buffer.begin(), buffer.end() - 1); // Remove the last zero byte
}

expected::ExpectedBytes DecodeBase64(string to_decode) {
        // Predict the len of the decoded for later verification. From man page:
        // For every 4 input bytes exactly 3 output bytes will be
        // produced. The output will be padded with 0 bits if necessary
        // to ensure that the output is always 3 bytes.
        const auto predicted_len = 3 * ((to_decode.size() + 3) / 4);

        auto buffer {vector<unsigned char>(predicted_len)};

        const auto output_len = EVP_DecodeBlock(
                buffer.data(),
                common::ByteVectorFromString(to_decode).data(),
                static_cast<int>(to_decode.size()));

        if (predicted_len != static_cast<unsigned long>(output_len)) {
                return expected::unexpected(MakeError(
                        Base64Error,
                        "The predicted (" + std::to_string(predicted_len) + ") and the actual ("
                                + std::to_string(output_len) + ") length differ"));
        }

        // Subtract padding bytes. Inspired by internal OpenSSL code from:
        // https://github.com/openssl/openssl/blob/ff88545e02ab48a52952350c52013cf765455dd3/crypto/ct/ct_b64.c#L46
        for (auto it = to_decode.crbegin(); *it == '='; it++) {
                buffer.pop_back();
        }

        return buffer;
}

string GetOpenSSLErrorMessage() {
        const auto sysErrorCode = errno;
        auto sslErrorCode = ERR_get_error();

        std::string errorDescription;
        while (sslErrorCode != 0) {
                errorDescription += ERR_error_string(sslErrorCode, nullptr);
                sslErrorCode = ERR_get_error();
        }
        if (sysErrorCode != 0) {
                if (!errorDescription.empty()) {
                        errorDescription += '\n';
                }
                errorDescription += "System error, code=" + std::to_string(sysErrorCode);
                errorDescription += ", ";
                errorDescription += strerror(sysErrorCode);
        }
        return errorDescription;
}

expected::ExpectedString ExtractPublicKey(const string &private_key_path) {
        auto private_bio_key = unique_ptr<BIO, void (*)(BIO *)>(
                BIO_new_file(private_key_path.c_str(), "r"), bio_free_func);

        if (!private_bio_key.get()) {
                return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));
        }

        auto private_key = unique_ptr<EVP_PKEY, void (*)(EVP_PKEY *)>(
                PEM_read_bio_PrivateKey(private_bio_key.get(), nullptr, nullptr, nullptr), pkey_free_func);
        if (private_key == nullptr) {
                return expected::unexpected(MakeError(SetupError, "Failed to load the key"));
        }

        auto bio_public_key = unique_ptr<BIO, void (*)(BIO *)>(BIO_new(BIO_s_mem()), bio_free_all_func);

        if (!bio_public_key.get()) {
                return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));
        }

        int ret = PEM_write_bio_PUBKEY(bio_public_key.get(), private_key.get());
        if (ret != OPENSSL_SUCCESS) {
                return expected::unexpected(MakeError(
                        SetupError,
                        "Failed to extract the public key. OpenSSL BIO write failed: "
                                + GetOpenSSLErrorMessage()));
        }

        int pending = BIO_ctrl_pending(bio_public_key.get());
        if (pending <= 0) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to extract the public key. Zero byte key unexpected"));
        }

        vector<uint8_t> key_vector(pending);

        size_t read = BIO_read(bio_public_key.get(), key_vector.data(), pending);

        if (read <= 0) {
                MakeError(SetupError, "Failed to extract the public key. Zero bytes read from BIO");
        }

        return string(key_vector.begin(), key_vector.end());
}

expected::ExpectedBytes SignData(const string private_key_path, const vector<uint8_t> digest) {
        auto bio_private_key = unique_ptr<BIO, void (*)(BIO *)>(
                BIO_new_file(private_key_path.c_str(), "r"), bio_free_func);
        if (bio_private_key == nullptr) {
                return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));
        }

        auto pkey = unique_ptr<EVP_PKEY, void (*)(EVP_PKEY *)>(
                PEM_read_bio_PrivateKey(bio_private_key.get(), nullptr, nullptr, nullptr), pkey_free_func);
        if (pkey == nullptr) {
                return expected::unexpected(MakeError(SetupError, "Failed to load the key"));
        }

        auto pkey_signer_ctx = unique_ptr<EVP_PKEY_CTX, void (*)(EVP_PKEY_CTX *)>(
                EVP_PKEY_CTX_new(pkey.get(), nullptr), pkey_ctx_free_func);

        if (EVP_PKEY_sign_init(pkey_signer_ctx.get()) <= 0) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to initialize the OpenSSL signer"));
        }
        if (EVP_PKEY_CTX_set_rsa_padding(pkey_signer_ctx.get(), RSA_PKCS1_PADDING) <= 0) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to set the OpenSSL padding to RSA_PKCS1"));
        }
        if (EVP_PKEY_CTX_set_signature_md(pkey_signer_ctx.get(), EVP_sha256()) <= 0) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to set the OpenSSL signature to sha256"));
        }

        vector<uint8_t> signature {};

        // Set the needed signature buffer length
        size_t digestlength = MENDER_DIGEST_SHA256_LENGTH, siglength;
        if (EVP_PKEY_sign(pkey_signer_ctx.get(), nullptr, &siglength, digest.data(), digestlength)
                <= 0) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to get the signature buffer length"));
        }
        signature.resize(siglength);

        if (EVP_PKEY_sign(
                        pkey_signer_ctx.get(), signature.data(), &siglength, digest.data(), digestlength)
                <= 0) {
                return expected::unexpected(MakeError(SetupError, "Failed to sign the digest"));
        }

        return signature;
}

expected::ExpectedString Sign(const string &private_key_path, const mender::sha::SHA &shasum) {
        auto exp_signed_data = SignData(private_key_path, shasum);
        if (!exp_signed_data) {
                return expected::unexpected(exp_signed_data.error());
        }
        vector<uint8_t> signature = exp_signed_data.value();

        return EncodeBase64(signature);
}

expected::ExpectedString SignRawData(
        const string &private_key_path, const vector<uint8_t> &raw_data) {
        auto exp_shasum = mender::sha::Shasum(raw_data);

        if (!exp_shasum) {
                return expected::unexpected(exp_shasum.error());
        }
        auto shasum = exp_shasum.value();
        log::Debug("Shasum is: " + shasum.String());

        return Sign(private_key_path, shasum);
}

expected::ExpectedBool VerifySignData(
        const string &public_key_path,
        const mender::sha::SHA &shasum,
        const vector<uint8_t> &signature) {
        auto bio_key =
                unique_ptr<BIO, void (*)(BIO *)>(BIO_new_file(public_key_path.c_str(), "r"), bio_free_func);
        if (bio_key == nullptr) {
                return expected::unexpected(MakeError(
                        SetupError, "Failed to open the public key file: " + GetOpenSSLErrorMessage()));
        }

        auto pkey = unique_ptr<EVP_PKEY, void (*)(EVP_PKEY *)>(
                PEM_read_bio_PUBKEY(bio_key.get(), nullptr, nullptr, nullptr), pkey_free_func);
        if (pkey == nullptr) {
                return expected::unexpected(
                        MakeError(SetupError, "Failed to load the key: " + GetOpenSSLErrorMessage()));
        }

        // prepare context
        auto pkey_signer_ctx = unique_ptr<EVP_PKEY_CTX, void (*)(EVP_PKEY_CTX *)>(
                EVP_PKEY_CTX_new(pkey.get(), nullptr), pkey_ctx_free_func);

        auto ret = EVP_PKEY_verify_init(pkey_signer_ctx.get());
        if (ret <= 0) {
                return expected::unexpected(MakeError(
                        SetupError, "Failed to initialize the OpenSSL signer: " + GetOpenSSLErrorMessage()));
        }
        ret = EVP_PKEY_CTX_set_rsa_padding(pkey_signer_ctx.get(), RSA_PKCS1_PADDING);
        if (ret <= 0) {
                return expected::unexpected(MakeError(
                        SetupError,
                        "Failed to set the OpenSSL padding to RSA_PKCS1: " + GetOpenSSLErrorMessage()));
        }
        ret = EVP_PKEY_CTX_set_signature_md(pkey_signer_ctx.get(), EVP_sha256());
        if (ret <= 0) {
                return expected::unexpected(MakeError(
                        SetupError,
                        "Failed to set the OpenSSL signature to sha256: " + GetOpenSSLErrorMessage()));
        }

        // verify signature
        ret = EVP_PKEY_verify(
                pkey_signer_ctx.get(), signature.data(), signature.size(), shasum.data(), shasum.size());
        if (ret < 0) {
                return expected::unexpected(MakeError(
                        VerificationError,
                        "Failed to verify signature. OpenSSL PKEY verify failed: " + GetOpenSSLErrorMessage()));
        }

        return ret == 1;
}

expected::ExpectedBool VerifySign(
        const string &public_key_path, const mender::sha::SHA &shasum, const string &signature) {
        // signature: decode base64
        auto exp_decoded_signature = DecodeBase64(signature);
        if (!exp_decoded_signature) {
                return expected::unexpected(exp_decoded_signature.error());
        }
        auto decoded_signature = exp_decoded_signature.value();

        return VerifySignData(public_key_path, shasum, decoded_signature);
}

} // namespace crypto
} // namespace common
} // namespace mender

1	// Copyright 2023 Northern.tech AS
2	//
3	// Licensed under the Apache License, Version 2.0 (the "License");
4	// you may not use this file except in compliance with the License.
5	// You may obtain a copy of the License at
6	//
7	// http://www.apache.org/licenses/LICENSE-2.0
8	//
9	// Unless required by applicable law or agreed to in writing, software
10	// distributed under the License is distributed on an "AS IS" BASIS,
11	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12	// See the License for the specific language governing permissions and
13	// limitations under the License.
14
15	#include <common/crypto.hpp>
16
17	#include <cstdint>
18	#include <string>
19	#include <vector>
20	#include <memory>
21
22	#include <common/io.hpp>
23	#include <common/error.hpp>
24	#include <common/expected.hpp>
25	#include <common/common.hpp>
26
27	#include <artifact/sha/sha.hpp>
28
29	#include <openssl/evp.h>
30	#include <openssl/pem.h>
31	#include <openssl/err.h>
32	#include <openssl/rsa.h>
33
34
35	namespace mender {
36	namespace common {
37	namespace crypto {
38
39	const size_t MENDER_DIGEST_SHA256_LENGTH = 32;
40
41	const size_t OPENSSL_SUCCESS = 1;
42
43	using namespace std;
44
45	namespace error = mender::common::error;
46	namespace io = mender::common::io;
47
48	auto pkey_ctx_free_func = [](EVP_PKEY_CTX *ctx) {	20✔
49	if (ctx) {	20✔
50	EVP_PKEY_CTX_free(ctx);	20✔
51	}
52	};	20✔
53	auto pkey_free_func = [](EVP_PKEY *key) {	33✔
54	if (key) {	33✔
55	EVP_PKEY_free(key);	33✔
56	}
57	};	33✔
58	auto bio_free_func = [](BIO *bio) {	35✔
59	if (bio) {	35✔
60	BIO_free(bio);	35✔
61	}
62	};	35✔
63	auto bio_free_all_func = [](BIO *bio) {	13✔
64	if (bio) {	13✔
65	BIO_free_all(bio);	13✔
66	}
67	};	13✔
68
69	expected::ExpectedString EncodeBase64(vector<uint8_t> to_encode) {	15✔
70	// Predict the len of the decoded for later verification. From man page:
71	// For every 3 bytes of input provided 4 bytes of output
72	// data will be produced. If n is not divisible by 3 (...)
73	// the output is padded such that it is always divisible by 4.
74	const auto predicted_len = 4 * ((to_encode.size() + 2) / 3);	15✔
75
76	// Add space for a NUL terminator. From man page:
77	// Additionally a NUL terminator character will be added
78	auto buffer {vector<unsigned char>(predicted_len + 1)};	30✔
79
80	const auto output_len =
81	EVP_EncodeBlock(buffer.data(), to_encode.data(), static_cast<int>(to_encode.size()));	15✔
82
83	if (predicted_len != static_cast<unsigned long>(output_len)) {	15✔
84	return expected::unexpected(	×
85	MakeError(Base64Error, "The predicted and the actual length differ"));	×
86	}
87
88	return string(buffer.begin(), buffer.end() - 1); // Remove the last zero byte	30✔
89	}
90
91	expected::ExpectedBytes DecodeBase64(string to_decode) {	12✔
92	// Predict the len of the decoded for later verification. From man page:
93	// For every 4 input bytes exactly 3 output bytes will be
94	// produced. The output will be padded with 0 bits if necessary
95	// to ensure that the output is always 3 bytes.
96	const auto predicted_len = 3 * ((to_decode.size() + 3) / 4);	12✔
97
98	auto buffer {vector<unsigned char>(predicted_len)};	24✔
99
100	const auto output_len = EVP_DecodeBlock(	12✔
101	buffer.data(),
102	common::ByteVectorFromString(to_decode).data(),	24✔
103	static_cast<int>(to_decode.size()));	12✔
104
105	if (predicted_len != static_cast<unsigned long>(output_len)) {	12✔
106	return expected::unexpected(MakeError(	×
107	Base64Error,
108	"The predicted (" + std::to_string(predicted_len) + ") and the actual ("	×
109	+ std::to_string(output_len) + ") length differ"));	×
110	}
111
112	// Subtract padding bytes. Inspired by internal OpenSSL code from:
113	// https://github.com/openssl/openssl/blob/ff88545e02ab48a52952350c52013cf765455dd3/crypto/ct/ct_b64.c#L46
114	for (auto it = to_decode.crbegin(); *it == '='; it++) {	16✔
115	buffer.pop_back();	4✔
116	}
117
118	return buffer;	12✔
119	}
120
121	string GetOpenSSLErrorMessage() {	5✔
122	const auto sysErrorCode = errno;	5✔
123	auto sslErrorCode = ERR_get_error();	5✔
124
125	std::string errorDescription;	5✔
126	while (sslErrorCode != 0) {	16✔
127	errorDescription += ERR_error_string(sslErrorCode, nullptr);	11✔
128	sslErrorCode = ERR_get_error();	11✔
129	}
130	if (sysErrorCode != 0) {	5✔
131	if (!errorDescription.empty()) {	5✔
132	errorDescription += '\n';	5✔
133	}
134	errorDescription += "System error, code=" + std::to_string(sysErrorCode);	5✔
135	errorDescription += ", ";	5✔
136	errorDescription += strerror(sysErrorCode);	5✔
137	}
138	return errorDescription;	5✔
139	}
140
141	expected::ExpectedString ExtractPublicKey(const string &private_key_path) {	14✔
142	auto private_bio_key = unique_ptr<BIO, void ()(BIO )>(
143	BIO_new_file(private_key_path.c_str(), "r"), bio_free_func);	28✔
144
145	if (!private_bio_key.get()) {	14✔
146	return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));	2✔
147	}
148
149	auto private_key = unique_ptr<EVP_PKEY, void ()(EVP_PKEY )>(
150	PEM_read_bio_PrivateKey(private_bio_key.get(), nullptr, nullptr, nullptr), pkey_free_func);	26✔
151	if (private_key == nullptr) {	13✔
152	return expected::unexpected(MakeError(SetupError, "Failed to load the key"));	×
153	}
154
155	auto bio_public_key = unique_ptr<BIO, void ()(BIO )>(BIO_new(BIO_s_mem()), bio_free_all_func);	26✔
156
157	if (!bio_public_key.get()) {	13✔
158	return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));	×
159	}
160
161	int ret = PEM_write_bio_PUBKEY(bio_public_key.get(), private_key.get());	13✔
162	if (ret != OPENSSL_SUCCESS) {	13✔
163	return expected::unexpected(MakeError(	×
164	SetupError,
165	"Failed to extract the public key. OpenSSL BIO write failed: "
166	+ GetOpenSSLErrorMessage()));	×
167	}
168
169	int pending = BIO_ctrl_pending(bio_public_key.get());	13✔
170	if (pending <= 0) {	13✔
171	return expected::unexpected(	×
172	MakeError(SetupError, "Failed to extract the public key. Zero byte key unexpected"));	×
173	}
174
175	vector<uint8_t> key_vector(pending);	26✔
176
177	size_t read = BIO_read(bio_public_key.get(), key_vector.data(), pending);	13✔
178
179	if (read <= 0) {	13✔
180	MakeError(SetupError, "Failed to extract the public key. Zero bytes read from BIO");	×
181	}
182
183	return string(key_vector.begin(), key_vector.end());	26✔
184	}
185
186	expected::ExpectedBytes SignData(const string private_key_path, const vector<uint8_t> digest) {	15✔
187	auto bio_private_key = unique_ptr<BIO, void ()(BIO )>(
188	BIO_new_file(private_key_path.c_str(), "r"), bio_free_func);	30✔
189	if (bio_private_key == nullptr) {	15✔
190	return expected::unexpected(MakeError(SetupError, "Failed to open the private key file"));	2✔
191	}
192
193	auto pkey = unique_ptr<EVP_PKEY, void ()(EVP_PKEY )>(
194	PEM_read_bio_PrivateKey(bio_private_key.get(), nullptr, nullptr, nullptr), pkey_free_func);	28✔
195	if (pkey == nullptr) {	14✔
196	return expected::unexpected(MakeError(SetupError, "Failed to load the key"));	×
197	}
198
199	auto pkey_signer_ctx = unique_ptr<EVP_PKEY_CTX, void ()(EVP_PKEY_CTX )>(
200	EVP_PKEY_CTX_new(pkey.get(), nullptr), pkey_ctx_free_func);	28✔
201
202	if (EVP_PKEY_sign_init(pkey_signer_ctx.get()) <= 0) {	14✔
203	return expected::unexpected(	×
204	MakeError(SetupError, "Failed to initialize the OpenSSL signer"));	×
205	}
206	if (EVP_PKEY_CTX_set_rsa_padding(pkey_signer_ctx.get(), RSA_PKCS1_PADDING) <= 0) {	14✔
207	return expected::unexpected(	×
208	MakeError(SetupError, "Failed to set the OpenSSL padding to RSA_PKCS1"));	×
209	}
210	if (EVP_PKEY_CTX_set_signature_md(pkey_signer_ctx.get(), EVP_sha256()) <= 0) {	14✔
211	return expected::unexpected(	×
212	MakeError(SetupError, "Failed to set the OpenSSL signature to sha256"));	×
213	}
214
215	vector<uint8_t> signature {};	28✔
216
217	// Set the needed signature buffer length
218	size_t digestlength = MENDER_DIGEST_SHA256_LENGTH, siglength;	14✔
219	if (EVP_PKEY_sign(pkey_signer_ctx.get(), nullptr, &siglength, digest.data(), digestlength)	14✔
220	<= 0) {	14✔
221	return expected::unexpected(	×
222	MakeError(SetupError, "Failed to get the signature buffer length"));	×
223	}
224	signature.resize(siglength);	14✔
225
226	if (EVP_PKEY_sign(	14✔
227	pkey_signer_ctx.get(), signature.data(), &siglength, digest.data(), digestlength)
228	<= 0) {	14✔
229	return expected::unexpected(MakeError(SetupError, "Failed to sign the digest"));	×
230	}
231
232	return signature;	14✔
233	}
234
235	expected::ExpectedString Sign(const string &private_key_path, const mender::sha::SHA &shasum) {	15✔
236	auto exp_signed_data = SignData(private_key_path, shasum);	45✔
237	if (!exp_signed_data) {	15✔
238	return expected::unexpected(exp_signed_data.error());	2✔
239	}
240	vector<uint8_t> signature = exp_signed_data.value();	14✔
241
242	return EncodeBase64(signature);	14✔
243	}
244
245	expected::ExpectedString SignRawData(	14✔
246	const string &private_key_path, const vector<uint8_t> &raw_data) {
247	auto exp_shasum = mender::sha::Shasum(raw_data);	28✔
248
249	if (!exp_shasum) {	14✔
250	return expected::unexpected(exp_shasum.error());	×
251	}
252	auto shasum = exp_shasum.value();	28✔
253	log::Debug("Shasum is: " + shasum.String());	14✔
254
255	return Sign(private_key_path, shasum);	14✔
256	}
257
258	expected::ExpectedBool VerifySignData(	11✔
259	const string &public_key_path,
260	const mender::sha::SHA &shasum,
261	const vector<uint8_t> &signature) {
262	auto bio_key =
263	unique_ptr<BIO, void ()(BIO )>(BIO_new_file(public_key_path.c_str(), "r"), bio_free_func);	22✔
264	if (bio_key == nullptr) {	11✔
265	return expected::unexpected(MakeError(	3✔
266	SetupError, "Failed to open the public key file: " + GetOpenSSLErrorMessage()));	6✔
267	}
268
269	auto pkey = unique_ptr<EVP_PKEY, void ()(EVP_PKEY )>(
270	PEM_read_bio_PUBKEY(bio_key.get(), nullptr, nullptr, nullptr), pkey_free_func);	16✔
271	if (pkey == nullptr) {	8✔
272	return expected::unexpected(	2✔
273	MakeError(SetupError, "Failed to load the key: " + GetOpenSSLErrorMessage()));	4✔
274	}
275
276	// prepare context
277	auto pkey_signer_ctx = unique_ptr<EVP_PKEY_CTX, void ()(EVP_PKEY_CTX )>(
278	EVP_PKEY_CTX_new(pkey.get(), nullptr), pkey_ctx_free_func);	12✔
279
280	auto ret = EVP_PKEY_verify_init(pkey_signer_ctx.get());	6✔
281	if (ret <= 0) {	6✔
282	return expected::unexpected(MakeError(	×
283	SetupError, "Failed to initialize the OpenSSL signer: " + GetOpenSSLErrorMessage()));	×
284	}
285	ret = EVP_PKEY_CTX_set_rsa_padding(pkey_signer_ctx.get(), RSA_PKCS1_PADDING);	6✔
286	if (ret <= 0) {	6✔
287	return expected::unexpected(MakeError(	×
288	SetupError,
289	"Failed to set the OpenSSL padding to RSA_PKCS1: " + GetOpenSSLErrorMessage()));	×
290	}
291	ret = EVP_PKEY_CTX_set_signature_md(pkey_signer_ctx.get(), EVP_sha256());	6✔
292	if (ret <= 0) {	6✔
293	return expected::unexpected(MakeError(	×
294	SetupError,
295	"Failed to set the OpenSSL signature to sha256: " + GetOpenSSLErrorMessage()));	×
296	}
297
298	// verify signature
299	ret = EVP_PKEY_verify(	6✔
300	pkey_signer_ctx.get(), signature.data(), signature.size(), shasum.data(), shasum.size());
301	if (ret < 0) {	6✔
302	return expected::unexpected(MakeError(	×
303	VerificationError,
304	"Failed to verify signature. OpenSSL PKEY verify failed: " + GetOpenSSLErrorMessage()));	×
305	}
306
307	return ret == 1;	12✔
308	}
309
310	expected::ExpectedBool VerifySign(	11✔
311	const string &public_key_path, const mender::sha::SHA &shasum, const string &signature) {
312	// signature: decode base64
313	auto exp_decoded_signature = DecodeBase64(signature);	22✔
314	if (!exp_decoded_signature) {	11✔
315	return expected::unexpected(exp_decoded_signature.error());	×
316	}
317	auto decoded_signature = exp_decoded_signature.value();	22✔
318
319	return VerifySignData(public_key_path, shasum, decoded_signature);	11✔
320	}
321
322	} // namespace crypto
323	} // namespace common
324	} // namespace mender

mendersoftware / mender / 951586380

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