f07ed2efeb
Creates a new class handle the package in memory and package read from fd. Define the new interface functions, and make approximate changes to the verify and install functions. Bug: 127071893 Test: unit tests pass, sideload a package Change-Id: I66ab00654df92471184536fd147b237a86e9c5b5
106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _RECOVERY_VERIFIER_H
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#define _RECOVERY_VERIFIER_H
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#include <stdint.h>
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#include <functional>
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#include <memory>
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#include <vector>
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#include <openssl/ec_key.h>
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#include <openssl/rsa.h>
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#include <openssl/sha.h>
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using HasherUpdateCallback = std::function<void(const uint8_t* addr, uint64_t size)>;
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struct RSADeleter {
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void operator()(RSA* rsa) const {
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RSA_free(rsa);
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}
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};
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struct ECKEYDeleter {
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void operator()(EC_KEY* ec_key) const {
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EC_KEY_free(ec_key);
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}
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};
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struct Certificate {
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typedef enum {
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KEY_TYPE_RSA,
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KEY_TYPE_EC,
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} KeyType;
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Certificate(int hash_len_,
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KeyType key_type_,
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std::unique_ptr<RSA, RSADeleter>&& rsa_,
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std::unique_ptr<EC_KEY, ECKEYDeleter>&& ec_)
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: hash_len(hash_len_),
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key_type(key_type_),
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rsa(std::move(rsa_)),
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ec(std::move(ec_)) {}
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// SHA_DIGEST_LENGTH (SHA-1) or SHA256_DIGEST_LENGTH (SHA-256)
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int hash_len;
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KeyType key_type;
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std::unique_ptr<RSA, RSADeleter> rsa;
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std::unique_ptr<EC_KEY, ECKEYDeleter> ec;
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};
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class VerifierInterface {
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public:
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virtual ~VerifierInterface() = default;
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// Returns the package size in bytes.
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virtual uint64_t GetPackageSize() const = 0;
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// Reads |byte_count| data starting from |offset|, and puts the result in |buffer|.
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virtual bool ReadFullyAtOffset(uint8_t* buffer, uint64_t byte_count, uint64_t offset) = 0;
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// Updates the hash contexts for |length| bytes data starting from |start|.
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virtual bool UpdateHashAtOffset(const std::vector<HasherUpdateCallback>& hashers, uint64_t start,
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uint64_t length) = 0;
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// Updates the progress in fraction during package verification.
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virtual void SetProgress(float progress) = 0;
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};
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// Looks for an RSA signature embedded in the .ZIP file comment given the path to the zip.
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// Verifies that it matches one of the given public keys. Returns VERIFY_SUCCESS or
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// VERIFY_FAILURE (if any error is encountered or no key matches the signature).
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int verify_file(VerifierInterface* package, const std::vector<Certificate>& keys);
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// Checks that the RSA key has a modulus of 2048 bits long, and public exponent is 3 or 65537.
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bool CheckRSAKey(const std::unique_ptr<RSA, RSADeleter>& rsa);
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// Checks that the field size of the curve for the EC key is 256 bits.
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bool CheckECKey(const std::unique_ptr<EC_KEY, ECKEYDeleter>& ec_key);
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// Parses a PEM-encoded x509 certificate from the given buffer and saves it into |cert|. Returns
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// false if there is a parsing failure or the signature's encryption algorithm is not supported.
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bool LoadCertificateFromBuffer(const std::vector<uint8_t>& pem_content, Certificate* cert);
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// Iterates over the zip entries with the suffix "x509.pem" and returns a list of recognized
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// certificates. Returns an empty list if we fail to parse any of the entries.
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std::vector<Certificate> LoadKeysFromZipfile(const std::string& zip_name);
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#define VERIFY_SUCCESS 0
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#define VERIFY_FAILURE 1
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#endif /* _RECOVERY_VERIFIER_H */
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