861c53c6c5
Test: mmma bootable/recovery Test: recovery_unit_test passes. Test: recovery_component_test passes. Change-Id: If0bf25993158eaebeedff55ba4f4dd0f6e5f937d
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
/*
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* Copyright (C) 2013 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 ASN1_DECODER_H_
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#define ASN1_DECODER_H_
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#include <stdint.h>
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class asn1_context {
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public:
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asn1_context(const uint8_t* buffer, size_t length) : p_(buffer), length_(length), app_type_(0) {}
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int asn1_constructed_type() const;
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asn1_context* asn1_constructed_get();
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bool asn1_constructed_skip_all();
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asn1_context* asn1_sequence_get();
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asn1_context* asn1_set_get();
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bool asn1_sequence_next();
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bool asn1_oid_get(const uint8_t** oid, size_t* length);
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bool asn1_octet_string_get(const uint8_t** octet_string, size_t* length);
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private:
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static constexpr int kMaskConstructed = 0xE0;
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static constexpr int kMaskTag = 0x7F;
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static constexpr int kMaskAppType = 0x1F;
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static constexpr int kTagOctetString = 0x04;
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static constexpr int kTagOid = 0x06;
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static constexpr int kTagSequence = 0x30;
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static constexpr int kTagSet = 0x31;
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static constexpr int kTagConstructed = 0xA0;
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int peek_byte() const;
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int get_byte();
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bool skip_bytes(size_t num_skip);
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bool decode_length(size_t* out_len);
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const uint8_t* p_;
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size_t length_;
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int app_type_;
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};
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#endif /* ASN1_DECODER_H_ */
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