Package org.omegazero.net.util

Class PrivateKeyReader

java.lang.Object

org.omegazero.net.util.PrivateKeyReader

public final class PrivateKeyReader
extends Object

Class for reading a RSA or EC private key from a PEM-formatted string.

It can read PEM files with PKCS#8 or PKCS#1 encodings. It does not support encrypted PEM files.

This implementation is from here (archived page). For more information and a link to the original source code, see the license header of this source file.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	P1_BEGIN_MARKER
static final String	P1_END_MARKER
static final String	P8_BEGIN_MARKER
static final String	P8_END_MARKER

Method Summary

Modifier and Type	Method	Description
static RSAPrivateCrtKeySpec	getRSAKeySpec(byte[] keyBytes)	Convert PKCS#1 encoded private key into RSAPrivateCrtKeySpec.
static PrivateKey	read(String keyString)	Parses the given PEM-formatted string representing a private key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

P1_BEGIN_MARKER

public static final String P1_BEGIN_MARKER

See Also:

• Constant Field Values

P1_END_MARKER

public static final String P1_END_MARKER

See Also:

• Constant Field Values

P8_BEGIN_MARKER

public static final String P8_BEGIN_MARKER

See Also:

• Constant Field Values

P8_END_MARKER

public static final String P8_END_MARKER

See Also:

• Constant Field Values

Method Details

read

public static PrivateKey read(String keyString)
                       throws IOException,
GeneralSecurityException

Parses the given PEM-formatted string representing a private key.

Returns:

The PrivateKey

Throws:

IOException - If the given key string is malformed

GeneralSecurityException - If the given key string could not be parsed

getRSAKeySpec

public static RSAPrivateCrtKeySpec getRSAKeySpec(byte[] keyBytes)
                                          throws IOException

Convert PKCS#1 encoded private key into RSAPrivateCrtKeySpec.

The ASN.1 syntax for the private key with CRT is

 -- 
 -- Representation of RSA private key with information for the CRT algorithm.
 --
 RSAPrivateKey ::= SEQUENCE {
   version           Version, 
   modulus           INTEGER,  -- n
   publicExponent    INTEGER,  -- e
   privateExponent   INTEGER,  -- d
   prime1            INTEGER,  -- p
   prime2            INTEGER,  -- q
   exponent1         INTEGER,  -- d mod (p-1)
   exponent2         INTEGER,  -- d mod (q-1) 
   coefficient       INTEGER,  -- (inverse of q) mod p
   otherPrimeInfos   OtherPrimeInfos OPTIONAL 
 }
 

Parameters:

keyBytes - PKCS#1 encoded key

Returns:

KeySpec

Throws:

IOException