33 lines
786 B
Objective-C
33 lines
786 B
Objective-C
//
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// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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#import "Randomness.h"
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NS_ASSUME_NONNULL_BEGIN
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@implementation Randomness
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+ (NSData *)generateRandomBytes:(int)numberBytes
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{
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NSMutableData *_Nullable randomBytes = [NSMutableData dataWithLength:numberBytes];
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if (!randomBytes) {
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OWSFail(@"Could not allocate buffer for random bytes.");
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}
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int err = 0;
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err = SecRandomCopyBytes(kSecRandomDefault, numberBytes, [randomBytes mutableBytes]);
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if (err != noErr || randomBytes.length != numberBytes) {
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OWSFail(@"Could not generate random bytes.");
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}
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NSData *copy = [randomBytes copy];
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OWSAssert(copy != nil);
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OWSAssert(copy.length == numberBytes);
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return copy;
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}
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@end
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NS_ASSUME_NONNULL_END
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