Package com.itextpdf.text.pdf.security
Class PrivateKeySignature
- java.lang.Object
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- com.itextpdf.text.pdf.security.PrivateKeySignature
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- All Implemented Interfaces:
ExternalSignature
public class PrivateKeySignature extends java.lang.Object implements ExternalSignature
Implementation of the ExternalSignature interface that can be used when you have a PrivateKey object.- Author:
- Paulo Soares
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Constructor Summary
Constructors Constructor Description PrivateKeySignature(java.security.PrivateKey pk, java.lang.String hashAlgorithm, java.lang.String provider)
Creates an ExternalSignature instance
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getEncryptionAlgorithm()
Returns the encryption algorithm used for signing.java.lang.String
getHashAlgorithm()
Returns the hash algorithm.byte[]
sign(byte[] b)
Signs it using the encryption algorithm in combination with the digest algorithm.
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Constructor Detail
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PrivateKeySignature
public PrivateKeySignature(java.security.PrivateKey pk, java.lang.String hashAlgorithm, java.lang.String provider)
Creates an ExternalSignature instance- Parameters:
pk
- a PrivateKey objecthashAlgorithm
- the hash algorithm (e.g. "SHA-1", "SHA-256",...)provider
- the security provider (e.g. "BC")
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Method Detail
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getHashAlgorithm
public java.lang.String getHashAlgorithm()
Returns the hash algorithm.- Specified by:
getHashAlgorithm
in interfaceExternalSignature
- Returns:
- the hash algorithm (e.g. "SHA-1", "SHA-256,...")
- See Also:
ExternalSignature.getHashAlgorithm()
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getEncryptionAlgorithm
public java.lang.String getEncryptionAlgorithm()
Returns the encryption algorithm used for signing.- Specified by:
getEncryptionAlgorithm
in interfaceExternalSignature
- Returns:
- the encryption algorithm ("RSA" or "DSA")
- See Also:
ExternalSignature.getEncryptionAlgorithm()
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sign
public byte[] sign(byte[] b) throws java.security.GeneralSecurityException
Signs it using the encryption algorithm in combination with the digest algorithm.- Specified by:
sign
in interfaceExternalSignature
- Parameters:
message
- the message you want to be hashed and signed- Returns:
- a signed message digest
- Throws:
java.security.GeneralSecurityException
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