Examples with AzureKeyVault tech.pegasys.signers.azure.AzureKeyVault used on opensource projects

Example 1 with AzureKeyVault

use of tech.pegasys.signers.azure.AzureKeyVault in project signers by ConsenSys.

the class AzureKeyVaultSigner method sign.

@Override
public Signature sign(byte[] data) {
    final AzureKeyVault vault;
    try {
        vault = createUsingClientSecretCredentials(config.getClientId(), config.getClientSecret(), config.getTenantId(), config.getKeyVaultName());
    } catch (final Exception e) {
        LOG.error("Failed to connect to vault", e);
        throw new SignerInitializationException(INACCESSIBLE_KEY_ERROR, e);
    }
    final CryptographyClient cryptoClient = vault.fetchKey(config.getKeyName(), config.getKeyVersion());
    final byte[] dataToSign = needsToHash ? Hash.sha3(data) : data;
    final SignResult result = cryptoClient.sign(signingAlgo, dataToSign);
    final byte[] signature = result.getSignature();
    if (signature.length != 64) {
        throw new RuntimeException("Invalid signature from the key vault signing service, must be 64 bytes long");
    }
    // reference: blog by Tomislav Markovski
    // https://tomislav.tech/2018-02-05-ethereum-keyvault-signing-transactions/
    // The output of this will be a 64 byte array. The first 32 are the value for R and the rest is
    // S.
    final BigInteger R = new BigInteger(1, Arrays.copyOfRange(signature, 0, 32));
    final BigInteger S = new BigInteger(1, Arrays.copyOfRange(signature, 32, 64));
    // The Azure Signature MAY be in the "top" of the curve, which is illegal in Ethereum
    // thus it must be transposed to the lower intersection.
    final ECDSASignature initialSignature = new ECDSASignature(R, S);
    final ECDSASignature canonicalSignature = initialSignature.toCanonicalised();
    // Now we have to work backwards to figure out the recId needed to recover the signature.
    final int recId = recoverKeyIndex(canonicalSignature, dataToSign);
    if (recId == -1) {
        throw new RuntimeException("Could not construct a recoverable key. Are your credentials valid?");
    }
    final int headerByte = recId + 27;
    return new Signature(BigInteger.valueOf(headerByte), canonicalSignature.r, canonicalSignature.s);
}

Example 2 with AzureKeyVault

use of tech.pegasys.signers.azure.AzureKeyVault in project signers by ConsenSys.

the class AzureKeyVaultSignerFactory method createSigner.

public Signer createSigner(final AzureConfig config) {
    checkNotNull(config, "Config must be specified");
    final AzureKeyVault vault;
    try {
        vault = createUsingClientSecretCredentials(config.getClientId(), config.getClientSecret(), config.getTenantId(), config.getKeyVaultName());
    } catch (final Exception e) {
        LOG.error("Failed to connect to vault", e);
        throw new SignerInitializationException(INACCESSIBLE_KEY_ERROR, e);
    }
    final CryptographyClient cryptoClient;
    try {
        cryptoClient = vault.fetchKey(config.getKeyName(), config.getKeyVersion());
    } catch (final Exception e) {
        LOG.error("Unable to load key {}", e.getMessage());
        throw new SignerInitializationException(INVALID_KEY_PARAMETERS_ERROR, e);
    }
    final JsonWebKey jsonWebKey = cryptoClient.getKey().getKey();
    final String curveName = jsonWebKey.getCurveName().toString();
    if (!SUPPORTED_CURVE_NAMES.contains(curveName)) {
        LOG.error("Unsupported curve name: {}. Expecting one of {}.", curveName, SUPPORTED_CURVE_NAMES);
        throw new SignerInitializationException(UNSUPPORTED_CURVE_NAME);
    }
    final Bytes rawPublicKey = Bytes.concatenate(Bytes.wrap(jsonWebKey.getX()), Bytes.wrap(jsonWebKey.getY()));
    final boolean useDeprecatedCurveName = DEPRECATED_CURVE_NAME.equals(curveName);
    return new AzureKeyVaultSigner(config, rawPublicKey, needsToHash, useDeprecatedCurveName);
}

Example 3 with AzureKeyVault

use of tech.pegasys.signers.azure.AzureKeyVault in project web3signer by ConsenSys.

the class Eth2Runner method loadAzureSigners.

final Collection<ArtifactSigner> loadAzureSigners() {
    final AzureKeyVault keyVault = AzureKeyVaultFactory.createAzureKeyVault(azureKeyVaultParameters);
    return keyVault.mapSecrets((name, value) -> {
        try {
            final Bytes privateKeyBytes = Bytes.fromHexString(value);
            final BLSKeyPair keyPair = new BLSKeyPair(BLSSecretKey.fromBytes(Bytes32.wrap(privateKeyBytes)));
            return new BlsArtifactSigner(keyPair, SignerOrigin.AZURE);
        } catch (final Exception e) {
            LOG.error("Failed to load secret named {} from azure key vault.", name);
            return null;
        }
    });
}