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Add utilities for converting CATValues to/from NSSet. (#28453)
* Add utilities for converting CATValues to/from NSSet. * Address review comments. * Address more review comments.
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| @@ -0,0 +1,61 @@ | ||
| /** | ||
| * Copyright (c) 2023 Project CHIP Authors | ||
| * | ||
| * 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. | ||
| */ | ||
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| #import "MTRConversion.h" | ||
| #import "MTRLogging_Internal.h" | ||
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| #include <lib/support/SafeInt.h> | ||
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| CHIP_ERROR SetToCATValues(NSSet<NSNumber *> * catSet, chip::CATValues & values) | ||
| { | ||
| values = chip::kUndefinedCATs; | ||
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| unsigned long long tagCount = catSet.count; | ||
| if (tagCount > chip::kMaxSubjectCATAttributeCount) { | ||
| MTR_LOG_ERROR("%llu CASE Authenticated Tags cannot be represented in a certificate.", tagCount); | ||
| return CHIP_ERROR_INVALID_ARGUMENT; | ||
| } | ||
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| size_t tagIndex = 0; | ||
| for (NSNumber * boxedTag in [catSet.allObjects sortedArrayUsingSelector:@selector(compare:)]) { | ||
| auto unboxedTag = boxedTag.unsignedLongLongValue; | ||
| if (!chip::CanCastTo<chip::CASEAuthTag>(unboxedTag)) { | ||
| MTR_LOG_ERROR("0x%llx is not a valid CASE Authenticated Tag value.", unboxedTag); | ||
| return CHIP_ERROR_INVALID_ARGUMENT; | ||
| } | ||
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| auto tag = static_cast<chip::CASEAuthTag>(unboxedTag); | ||
| if (!chip::IsValidCASEAuthTag(tag)) { | ||
| MTR_LOG_ERROR("0x%" PRIx32 " is not a valid CASE Authenticated Tag value.", tag); | ||
| return CHIP_ERROR_INVALID_ARGUMENT; | ||
| } | ||
|
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| values.values[tagIndex++] = tag; | ||
| } | ||
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| return CHIP_NO_ERROR; | ||
| } | ||
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| NSSet<NSNumber *> * CATValuesToSet(const chip::CATValues & values) | ||
| { | ||
| auto * catSet = [[NSMutableSet alloc] initWithCapacity:values.GetNumTagsPresent()]; | ||
| for (auto & value : values.values) { | ||
| if (value != chip::kUndefinedCAT) { | ||
| [catSet addObject:@(value)]; | ||
| } | ||
| } | ||
| return [NSSet setWithSet:catSet]; | ||
| } |
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