ios: nearbyConnections: Move source to //third_party.

PiperOrigin-RevId: 408046875

cpp/platform/impl/ios/Source/Shared/GNCUtils.h

@@ -0,0 +1,50 @@
+// Copyright 2020 Google LLC
+//
+// 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
+//
+//     https://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.
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+// Current version of socket protocol.
+extern const int GNCSocketVersion;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// Generates a SHA-256 hash (32 bytes) from a data object.
+NSData *_Nullable GNCSha256Data(NSData *data);
+
+/// Generates a SHA-256 hash (32 bytes) from a string.
+NSData *_Nullable GNCSha256String(NSString *string);
+
+
+/// Generates an MD5 hash (16 bytes) from a data object.
+NSData *_Nullable GNCMd5Data(NSData *data);
+
+/// Generates an MD5 hash (16 bytes) from a string.
+NSData *_Nullable GNCMd5String(NSString *string);
+
+
+/// Base64-encode.
+NSString *GNCBase64Encode(NSData *data);
+
+/// Base64-decode.
+NSData *GNCBase64Decode(NSString *string);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+NS_ASSUME_NONNULL_END