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45 changes: 45 additions & 0 deletions
45
examples/tv-casting-app/darwin/MatterTvCastingBridge/MatterTvCastingBridge/MTRCryptoUtils.h
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| /** | ||
| * | ||
| * 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 <Foundation/Foundation.h> | ||
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| #ifndef MTRCryptoUtils_h | ||
| #define MTRCryptoUtils_h | ||
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| @interface MTRCryptoUtils : NSObject | ||
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| /** | ||
| * @brief Convert an ASN.1 DER signature (per X9.62) as used by TLS libraries to SEC1 raw format | ||
| * | ||
| * Errors are: | ||
| * - CHIP_ERROR_INVALID_ARGUMENT on any argument being invalid (e.g. nullptr), wrong sizes, | ||
| * wrong or unsupported format, | ||
| * - CHIP_ERROR_BUFFER_TOO_SMALL on running out of space at runtime. | ||
| * - CHIP_ERROR_INTERNAL on any unexpected processing error. | ||
| * | ||
| * @param[in] feLengthBytes Field Element length in bytes (e.g. 32 for P256 curve) | ||
| * @param[in] asn1Signature ASN.1 DER signature input | ||
| * @param[out] outRawSignature Raw signature of <r,s> concatenated format output buffer. Size must be at | ||
| * least >= `2 * fe_length_bytes`. On success, the outRawSignature buffer will be re-assigned | ||
| * to have the correct size (2 * feLengthBytes). | ||
| * @return Returns an NSError on error, nil otherwise | ||
| */ | ||
| + (NSError * _Nullable)ecdsaAsn1SignatureToRawWithFeLengthBytes:(NSUInteger)feLengthBytes asn1Signature:(CFDataRef _Nonnull)asn1Signature outRawSignature:(NSData *_Nullable* _Nullable)outRawSignature; | ||
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| @end | ||
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| #endif /* MTRCryptoUtils_h */ |
53 changes: 53 additions & 0 deletions
53
examples/tv-casting-app/darwin/MatterTvCastingBridge/MatterTvCastingBridge/MTRCryptoUtils.mm
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| /** | ||
| * | ||
| * Copyright (c) 2020-2022 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 "MTRCryptoUtils.h" | ||
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| #include <crypto/CHIPCryptoPAL.h> | ||
| #include <lib/support/logging/CHIPLogging.h> | ||
| #include <lib/support/Span.h> | ||
| #include <lib/core/CHIPError.h> | ||
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| #include <Security/Security.h> | ||
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| @implementation MTRCryptoUtils | ||
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| + (NSError *)ecdsaAsn1SignatureToRawWithFeLengthBytes:(NSUInteger)feLengthBytes asn1Signature:(CFDataRef)asn1Signature outRawSignature:(NSData **)outRawSignature | ||
| { | ||
| // convert asn1Signature from CFDataRef to MutableByteSpan (asn1SignatureByteSpan) | ||
| uint8_t mAsn1SignatureBytes[256]; | ||
| chip::MutableByteSpan asn1SignatureByteSpan = chip::MutableByteSpan(mAsn1SignatureBytes, sizeof(mAsn1SignatureBytes)); | ||
| size_t signatureLen = CFDataGetLength(asn1Signature); | ||
| CFDataGetBytes(asn1Signature, CFRangeMake(0, signatureLen), asn1SignatureByteSpan.data()); | ||
| asn1SignatureByteSpan.reduce_size(signatureLen); | ||
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| uint8_t *outRawSignatureBytes = new uint8_t[(*outRawSignature).length]; | ||
| chip::MutableByteSpan outRawSignatureMutableByteSpan = chip::MutableByteSpan(outRawSignatureBytes, (*outRawSignature).length); | ||
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| CHIP_ERROR conversionError = chip::Crypto::EcdsaAsn1SignatureToRaw( | ||
| feLengthBytes, chip::ByteSpan(asn1SignatureByteSpan.data(), asn1SignatureByteSpan.size()), outRawSignatureMutableByteSpan); | ||
| if (CHIP_NO_ERROR != conversionError) { | ||
| ChipLogError(AppServer, | ||
| "DeviceAttestationCredentialsProviderImpl::SignWithDeviceAttestationKey failed to convert to raw signature."); | ||
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| //break; | ||
| } | ||
| *outRawSignature = [NSData dataWithBytes:outRawSignatureMutableByteSpan.data() length:outRawSignatureMutableByteSpan.size()]; | ||
| return nil; | ||
| } | ||
|
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| @end |
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14 changes: 14 additions & 0 deletions
14
...s/tv-casting-app/darwin/TvCastingDarwin.xcworkspace/xcshareddata/swiftpm/Package.resolved
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,14 @@ | ||
| { | ||
| "pins" : [ | ||
| { | ||
| "identity" : "swift-asn1", | ||
| "kind" : "remoteSourceControl", | ||
| "location" : "https://github.com/apple/swift-asn1.git", | ||
| "state" : { | ||
| "revision" : "c7e239b5c1492ffc3ebd7fbcc7a92548ce4e78f0", | ||
| "version" : "1.1.0" | ||
| } | ||
| } | ||
| ], | ||
| "version" : 2 | ||
| } |
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