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import {
COSEALG,
COSEKEYS,
COSEPublicKey,
isCOSECrv,
isCOSEPublicKeyEC2,
isCOSEPublicKeyOKP,
isCOSEPublicKeyRSA,
} from '../../cose.ts';
import { verifyEC2 } from './verifyEC2.ts';
import { verifyRSA } from './verifyRSA.ts';
import { verifyOKP } from './verifyOKP.ts';
import { unwrapEC2Signature } from './unwrapEC2Signature.ts';
/**
* Verify signatures with their public key. Supports EC2 and RSA public keys.
*/
export function verify(opts: {
cosePublicKey: COSEPublicKey;
signature: Uint8Array;
data: Uint8Array;
shaHashOverride?: COSEALG;
}): Promise<boolean> {
const { cosePublicKey, signature, data, shaHashOverride } = opts;
if (isCOSEPublicKeyEC2(cosePublicKey)) {
const crv = cosePublicKey.get(COSEKEYS.crv);
if (!isCOSECrv(crv)) {
throw new Error(`unknown COSE curve ${crv}`);
}
const unwrappedSignature = unwrapEC2Signature(signature, crv);
return verifyEC2({
cosePublicKey,
signature: unwrappedSignature,
data,
shaHashOverride,
});
} else if (isCOSEPublicKeyRSA(cosePublicKey)) {
return verifyRSA({ cosePublicKey, signature, data, shaHashOverride });
} else if (isCOSEPublicKeyOKP(cosePublicKey)) {
return verifyOKP({ cosePublicKey, signature, data });
}
const kty = cosePublicKey.get(COSEKEYS.kty);
throw new Error(
`Signature verification with public key of kty ${kty} is not supported by this method`,
);
}
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