Package org.apache.xml.security.utils
Class JavaUtils
- java.lang.Object
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- org.apache.xml.security.utils.JavaUtils
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public final class JavaUtils extends java.lang.Object
A collection of different, general-purpose methods for JAVA-specific things
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Field Summary
Fields Modifier and Type Field Description private static org.slf4j.Logger
LOG
private static java.security.SecurityPermission
REGISTER_PERMISSION
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Constructor Summary
Constructors Modifier Constructor Description private
JavaUtils()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static void
checkRegisterPermission()
Throws aSecurityException
if a security manager is installed and the caller is not allowed to register an implementation of an algorithm, transform, or other security sensitive XML Signature function.static byte[]
convertDsaASN1toXMLDSIG(byte[] asn1Bytes, int size)
Converts an ASN.1 DSA value to a XML Signature DSA Value.static byte[]
convertDsaXMLDSIGtoASN1(byte[] xmldsigBytes, int size)
Converts an XML Signature DSA Value to a ASN.1 DSA value.static byte[]
getBytesFromFile(java.lang.String fileName)
Method getBytesFromFilestatic byte[]
getBytesFromStream(java.io.InputStream inputStream)
This method reads all bytes from the given InputStream till EOF and returns them as a byte array.static void
writeBytesToFilename(java.lang.String filename, byte[] bytes)
Method writeBytesToFilename
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Method Detail
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getBytesFromFile
public static byte[] getBytesFromFile(java.lang.String fileName) throws java.io.FileNotFoundException, java.io.IOException
Method getBytesFromFile- Parameters:
fileName
-- Returns:
- the bytes read from the file
- Throws:
java.io.FileNotFoundException
java.io.IOException
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writeBytesToFilename
public static void writeBytesToFilename(java.lang.String filename, byte[] bytes)
Method writeBytesToFilename- Parameters:
filename
-bytes
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getBytesFromStream
public static byte[] getBytesFromStream(java.io.InputStream inputStream) throws java.io.IOException
This method reads all bytes from the given InputStream till EOF and returns them as a byte array.- Parameters:
inputStream
-- Returns:
- the bytes read from the stream
- Throws:
java.io.FileNotFoundException
java.io.IOException
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convertDsaASN1toXMLDSIG
public static byte[] convertDsaASN1toXMLDSIG(byte[] asn1Bytes, int size) throws java.io.IOException
Converts an ASN.1 DSA value to a XML Signature DSA Value. The JCE DSA Signature algorithm creates ASN.1 encoded (r, s) value pairs (see section 2.2.2 of RFC 3279); the XML Signature requires the core BigInteger values.- Parameters:
asn1Bytes
- the ASN.1 encoded bytessize
- size of r and s in bytes- Returns:
- the XML Signature encoded bytes
- Throws:
java.io.IOException
- if the bytes are not encoded correctly- See Also:
- 6.4.1 DSA
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convertDsaXMLDSIGtoASN1
public static byte[] convertDsaXMLDSIGtoASN1(byte[] xmldsigBytes, int size) throws java.io.IOException
Converts an XML Signature DSA Value to a ASN.1 DSA value. The JCE DSA Signature algorithm creates ASN.1 encoded (r, s) value pairs (see section 2.2.2 of RFC 3279); the XML Signature requires the core BigInteger values.- Parameters:
xmldsigBytes
- the XML Signature encoded bytessize
- size of r and s in bytes- Returns:
- the ASN.1 encoded bytes
- Throws:
java.io.IOException
- if the bytes are not encoded correctly- See Also:
- 6.4.1 DSA
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checkRegisterPermission
public static void checkRegisterPermission()
Throws aSecurityException
if a security manager is installed and the caller is not allowed to register an implementation of an algorithm, transform, or other security sensitive XML Signature function.- Throws:
java.lang.SecurityException
- if a security manager is installed and the caller has not been granted the "org.apache.xml.security.register"SecurityPermission
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