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authorxunchang <xunchang@google.com>2019-03-23 00:08:52 +0100
committerxunchang <xunchang@google.com>2019-03-29 18:27:51 +0100
commit2478885f3ca47fe2c4073df1100f7bd6ad4931af (patch)
tree7bad452d0d5b0ae6eca9adf18c7bf8b8966a318f /asn1_decoder.cpp
parentMerge "Use flags = 0 to avoid fd closing for child updater process" (diff)
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Diffstat (limited to 'asn1_decoder.cpp')
-rw-r--r--asn1_decoder.cpp158
1 files changed, 0 insertions, 158 deletions
diff --git a/asn1_decoder.cpp b/asn1_decoder.cpp
deleted file mode 100644
index 285214f16..000000000
--- a/asn1_decoder.cpp
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * 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.
- */
-
-#include "asn1_decoder.h"
-
-#include <stdint.h>
-
-int asn1_context::peek_byte() const {
- if (length_ == 0) {
- return -1;
- }
- return *p_;
-}
-
-int asn1_context::get_byte() {
- if (length_ == 0) {
- return -1;
- }
-
- int byte = *p_;
- p_++;
- length_--;
- return byte;
-}
-
-bool asn1_context::skip_bytes(size_t num_skip) {
- if (length_ < num_skip) {
- return false;
- }
- p_ += num_skip;
- length_ -= num_skip;
- return true;
-}
-
-bool asn1_context::decode_length(size_t* out_len) {
- int num_octets = get_byte();
- if (num_octets == -1) {
- return false;
- }
- if ((num_octets & 0x80) == 0x00) {
- *out_len = num_octets;
- return true;
- }
- num_octets &= kMaskTag;
- if (static_cast<size_t>(num_octets) >= sizeof(size_t)) {
- return false;
- }
- size_t length = 0;
- for (int i = 0; i < num_octets; ++i) {
- int byte = get_byte();
- if (byte == -1) {
- return false;
- }
- length <<= 8;
- length += byte;
- }
- *out_len = length;
- return true;
-}
-
-/**
- * Returns the constructed type and advances the pointer. E.g. A0 -> 0
- */
-asn1_context* asn1_context::asn1_constructed_get() {
- int type = get_byte();
- if (type == -1 || (type & kMaskConstructed) != kTagConstructed) {
- return nullptr;
- }
- size_t length;
- if (!decode_length(&length) || length > length_) {
- return nullptr;
- }
- asn1_context* app_ctx = new asn1_context(p_, length);
- app_ctx->app_type_ = type & kMaskAppType;
- return app_ctx;
-}
-
-bool asn1_context::asn1_constructed_skip_all() {
- int byte = peek_byte();
- while (byte != -1 && (byte & kMaskConstructed) == kTagConstructed) {
- skip_bytes(1);
- size_t length;
- if (!decode_length(&length) || !skip_bytes(length)) {
- return false;
- }
- byte = peek_byte();
- }
- return byte != -1;
-}
-
-int asn1_context::asn1_constructed_type() const {
- return app_type_;
-}
-
-asn1_context* asn1_context::asn1_sequence_get() {
- if ((get_byte() & kMaskTag) != kTagSequence) {
- return nullptr;
- }
- size_t length;
- if (!decode_length(&length) || length > length_) {
- return nullptr;
- }
- return new asn1_context(p_, length);
-}
-
-asn1_context* asn1_context::asn1_set_get() {
- if ((get_byte() & kMaskTag) != kTagSet) {
- return nullptr;
- }
- size_t length;
- if (!decode_length(&length) || length > length_) {
- return nullptr;
- }
- return new asn1_context(p_, length);
-}
-
-bool asn1_context::asn1_sequence_next() {
- size_t length;
- if (get_byte() == -1 || !decode_length(&length) || !skip_bytes(length)) {
- return false;
- }
- return true;
-}
-
-bool asn1_context::asn1_oid_get(const uint8_t** oid, size_t* length) {
- if (get_byte() != kTagOid) {
- return false;
- }
- if (!decode_length(length) || *length == 0 || *length > length_) {
- return false;
- }
- *oid = p_;
- return true;
-}
-
-bool asn1_context::asn1_octet_string_get(const uint8_t** octet_string, size_t* length) {
- if (get_byte() != kTagOctetString) {
- return false;
- }
- if (!decode_length(length) || *length == 0 || *length > length_) {
- return false;
- }
- *octet_string = p_;
- return true;
-}