David Benjamin
33d1049b1f
We use the standard Apache 2.0 file header, described in "APPENDIX: How to apply the Apache License to your work." This was primarily automated by running: git ls-tree -r --name-only HEAD | xargs go run ./util/relicense.go See go/boringssl-relicensing-triage for the results of triaging the output of the tool. As part of this, switch from taking fiat-crypto under MIT license to Apache 2.0. (It is licensed under MIT OR Apache-2.0 OR BSD-1-Clause.) The copyright_summary tool can also be used to confirm we didn't accidentally drop any copyright lines: # Run before the CL git grep -l Copyright | xargs go run ./util/copyright_summary.go -out /tmp/old.json # Run after the CL git grep -l Copyright | xargs go run ./util/copyright_summary.go -compare /tmp/old.json Bug: 364634028 Change-Id: I17c50e761e9d077a1f92e25969e50ed35e320c59 Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/75852 Reviewed-by: Bob Beck <bbe@google.com> Commit-Queue: David Benjamin <davidben@google.com> Reviewed-by: Adam Langley <agl@google.com>
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
// Copyright 2023 The Chromium Authors
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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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// https://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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#include "ip_util.h"
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BSSL_NAMESPACE_BEGIN
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bool IsValidNetmask(der::Input mask) {
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if (mask.size() != kIPv4AddressSize && mask.size() != kIPv6AddressSize) {
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return false;
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}
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for (size_t i = 0; i < mask.size(); i++) {
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uint8_t b = mask[i];
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if (b != 0xff) {
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// b must be all ones followed by all zeros, so ~b must be all zeros
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// followed by all ones.
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uint8_t inv = ~b;
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if ((inv & (inv + 1)) != 0) {
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return false;
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}
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// The remaining bytes must be all zeros.
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for (size_t j = i + 1; j < mask.size(); j++) {
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if (mask[j] != 0) {
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return false;
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}
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}
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return true;
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}
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}
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return true;
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}
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bool IPAddressMatchesWithNetmask(der::Input addr1, der::Input addr2,
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der::Input mask) {
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if (addr1.size() != addr2.size() || addr1.size() != mask.size()) {
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return false;
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}
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for (size_t i = 0; i < addr1.size(); i++) {
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if ((addr1[i] & mask[i]) != (addr2[i] & mask[i])) {
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return false;
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}
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}
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return true;
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}
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BSSL_NAMESPACE_END
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