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 /*
  * Copyright 2012 Mirko Caserta
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this software except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *  http://www.apache.org/licenses/LICENSE-2.0
  *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.springcryptoutils.core.signature;
The default implementation for providing digital signatures when the private key is configured in an underlying mapping using a logical name.

Author(s):
Mirko Caserta (mirko.caserta@gmail.com)
	private Map<StringSignercache = new HashMap<StringSigner>();
	private String algorithm = "SHA1withRSA";
	private String provider;
The signature algorithm. The default is SHA1withRSA.

Parameters:
algorithm the signature algorithm
	public void setAlgorithm(String algorithm) {
		this. = algorithm;
	}

Sets the provider name of the specific implementation requested (e.g., "BC" for BouncyCastle, "SunJCE" for the default Sun JCE provider).

Parameters:
provider the provider to set
	public void setProvider(String provider) {
		this. = provider;
	}

The map of private keys where the map keys are logical names which must match the privateKeyId parameter as specified in the sign method.

Parameters:
privateKeyMap the private key map
See also:
sign(java.lang.String,byte[])
	public void setPrivateKeyMap(Map<StringPrivateKeyprivateKeyMap) {
		this. = privateKeyMap;
	}

Signs a message.

Parameters:
privateKeyId the logical name of the private key as configured in the private key map
message the message to sign
Returns:
the signature
See also:
setPrivateKeyMap(java.util.Map)
	public byte[] sign(String privateKeyIdbyte[] message) {
		Signer signer = .get(privateKeyId);
		if (signer != null) {
			return signer.sign(message);
		}
		SignerImpl signerImpl = new SignerImpl();
		PrivateKey privateKey = .get(privateKeyId);
		if (privateKey == null) {
			throw new SignatureException("private key not found: privateKeyId=" + privateKeyId);
		}
		signerImpl.setPrivateKey(privateKey);
		signerImpl.setProvider();
		.put(privateKeyIdsignerImpl);
		return signerImpl.sign(message);
	}
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