From 068329e97771588489eb9626c24cc61f23cb8888 Mon Sep 17 00:00:00 2001 From: Jacky Liu Date: Tue, 21 Dec 2021 00:32:50 +0800 Subject: Move package verifier from libinstall to libotautil So it can be used by device-specific codes. Bug: 184693830 Test: m; atest recovery_unit_test Change-Id: I5885334c1bd04214c9cc295f2337306261a1735c --- otautil/include/private/asn1_decoder.h | 56 ++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 otautil/include/private/asn1_decoder.h (limited to 'otautil/include/private/asn1_decoder.h') diff --git a/otautil/include/private/asn1_decoder.h b/otautil/include/private/asn1_decoder.h new file mode 100644 index 000000000..e5337d9c4 --- /dev/null +++ b/otautil/include/private/asn1_decoder.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * 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. + */ + +#ifndef ASN1_DECODER_H_ +#define ASN1_DECODER_H_ + +#include +#include + +class asn1_context { + public: + asn1_context(const uint8_t* buffer, size_t length) : p_(buffer), length_(length), app_type_(0) {} + int asn1_constructed_type() const; + asn1_context* asn1_constructed_get(); + bool asn1_constructed_skip_all(); + asn1_context* asn1_sequence_get(); + asn1_context* asn1_set_get(); + bool asn1_sequence_next(); + bool asn1_oid_get(const uint8_t** oid, size_t* length); + bool asn1_octet_string_get(const uint8_t** octet_string, size_t* length); + + private: + static constexpr int kMaskConstructed = 0xE0; + static constexpr int kMaskTag = 0x7F; + static constexpr int kMaskAppType = 0x1F; + + static constexpr int kTagOctetString = 0x04; + static constexpr int kTagOid = 0x06; + static constexpr int kTagSequence = 0x30; + static constexpr int kTagSet = 0x31; + static constexpr int kTagConstructed = 0xA0; + + int peek_byte() const; + int get_byte(); + bool skip_bytes(size_t num_skip); + bool decode_length(size_t* out_len); + + const uint8_t* p_; + size_t length_; + int app_type_; +}; + +#endif /* ASN1_DECODER_H_ */ -- cgit v1.2.3