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Document deriveBits in the EcdhPrivateKey Class #128

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May 30, 2024
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Document deriveBits in the EcdhPrivateKey Class #128

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80f78b7
docs: document deriveBits in EcdhPrivateKey
HamdaanAliQuatil May 30, 2024
303a6c3
Update lib/src/webcrypto/webcrypto.ecdh.dart
HamdaanAliQuatil May 30, 2024
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13 changes: 13 additions & 0 deletions lib/src/webcrypto/webcrypto.ecdh.dart
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Expand Up @@ -38,6 +38,19 @@ abstract class EcdhPrivateKey {
return impl.ecdhPrivateKey_generateKey(curve);
}

/// Derive a shared secret from two ECDH key pairs using the private key from one pair
/// and the public key from another.
///
/// The shared secret is identical whether using A's private key and B's public key,
/// or B's private key and A's public key, enabling secure key exchange between the
/// two parties.
///
/// [length] specifies the length of the derived secret in bits.
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/// [publicKey] is [EcdhPublicKey] from the other party's ECDH key pair.
///
/// Returns a [Uint8List] containing the derived shared secret.
///
/// {@macro EcdhPrivateKey:example}
// Note some webcrypto implementations (chrome, not firefox) supports passing
// null for length (in this primitive). However, you can always know the right
// length from the curve. Note p512 can provide up to: 528 bits!!!
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