Expose Credentials::ConvertX509CertToChipCert to Obj-C. (#22113)

* Expose `Credentials::ConvertX509CertToChipCert` to Obj-C. * Restyled by clang-format Co-authored-by: Restyled.io <[email protected]>
project-chip · Aug 25, 2022 · 80d134e · 80d134e
1 parent 85a2f68
commit 80d134e
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diff --git a/src/darwin/Framework/CHIP/MTRCertificates.h b/src/darwin/Framework/CHIP/MTRCertificates.h
@@ -125,6 +125,9 @@ NS_ASSUME_NONNULL_BEGIN
 + (nullable NSData *)generateCertificateSigningRequest:(id<MTRKeypair>)keypair
                                                  error:(NSError * __autoreleasing _Nullable * _Nullable)error;
 
+/** Converts the given X.509v3 certificate to the CHIP certificate format. */
++ (nullable NSData *)convertToCHIPCertFromX509Cert:(NSData *)x509Certificate;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/src/darwin/Framework/CHIP/MTRCertificates.mm b/src/darwin/Framework/CHIP/MTRCertificates.mm
@@ -16,6 +16,7 @@
 
 #import "MTRCertificates.h"
 #import "MTRError_Internal.h"
+#import "MTRLogging.h"
 #import "MTRMemory.h"
 #import "MTROperationalCredentialsDelegate.h"
 #import "MTRP256KeypairBridge.h"
@@ -196,4 +197,21 @@ + (nullable NSData *)generateCertificateSigningRequest:(id<MTRKeypair>)keypair
     return nil;
 }
 
++ (nullable NSData *)convertToCHIPCertFromX509Cert:(NSData *)x509Certificate
+{
+
+    chip::ByteSpan x509CertBytes = chip::ByteSpan((uint8_t *) x509Certificate.bytes, x509Certificate.length);
+
+    NSMutableData * chipCertBuffer = [[NSMutableData alloc] initWithLength:chip::Credentials::kMaxCHIPCertLength];
+    chip::MutableByteSpan chipCertBytes((uint8_t *) chipCertBuffer.mutableBytes, chip::Credentials::kMaxCHIPCertLength);
+
+    CHIP_ERROR errorCode = chip::Credentials::ConvertX509CertToChipCert(x509CertBytes, chipCertBytes);
+    MTR_LOG_ERROR("ConvertX509CertToChipCert: %{public}s", chip::ErrorStr(errorCode));
+
+    if (errorCode != CHIP_NO_ERROR)
+        return nil;
+
+    return [NSData dataWithBytes:chipCertBytes.data() length:chipCertBytes.size()];
+}
+
 @end