CryptoKit.CryptoKitError error 1 when using Symmetric key of size 512

Question

Sydney-CBD OP

Created Jul ’22

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Hi,

Not working and error above. let key512 = SymmetricKey(size: .init(bitCount: 512)) let encryptedData512 = try ChaChaPoly.seal(clear_data2!, using: key512).combined

If I change the bitcount to 256, no error. Same error even if I use AES.GCM

Thanks

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Answer 1

DTS Engineer OP

Apple

Aug ’22

The Apple CryptoKit ChaChaPoly type implements ChaCha20-Poly1305 which always uses a 256-bit key. For this and other details, see RFC 8439.

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