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Prefer key encapsulation to shared key derivation

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This commit is contained in:
Matt Gibson
2024-11-18 10:25:09 -08:00
parent a59512daa9
commit 6a7c05ae12
5 changed files with 0 additions and 657 deletions
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55
libs/node/src/services/node-crypto-function.service.ts
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@@ -283,61 +283,6 @@ export class NodeCryptoFunctionService implements CryptoFunctionService {
});
}
async diffieHellmanGenerateKeyPair(
algorithm: "x25519" | "ecdh",
curve: undefined | "P-256" | "P-384" | "P-521",
): Promise<{
keyPair: CryptoKeyPair;
publicKey: Uint8Array;
}> {
if (algorithm === "x25519" && curve != null) {
throw new Error("x25519 does not use the curve parameter.");
}
const keys = await crypto.subtle.generateKey(
{
name: algorithm,
namedCurve: curve,
},
true,
["deriveKey", "deriveBits"],
);
return {
keyPair: keys,
publicKey: new Uint8Array(await crypto.subtle.exportKey("raw", keys.publicKey)),
};
}
async deriveSharedKeyBits(
privateKey: CryptoKey,
publicKeyRaw: Uint8Array,
algorithm: "x25519" | "ecdh",
curve: undefined | "P-256" | "P-384" | "P-521",
): Promise<Uint8Array> {
if (algorithm === "x25519" && curve != null) {
throw new Error("x25519 does not use the curve parameter.");
}
const publicKey = await crypto.subtle.importKey(
"raw",
publicKeyRaw,
{ name: algorithm, namedCurve: curve },
true,
[],
);
const dhSecret = await crypto.subtle.deriveBits(
{
name: algorithm,
public: publicKey,
},
privateKey,
256,
);
return new Uint8Array(dhSecret);
}
aesGenerateKey(bitLength: 128 | 192 | 256 | 512): Promise<CsprngArray> {
return this.randomBytes(bitLength / 8);
}