You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
496 lines
15 KiB
496 lines
15 KiB
//
|
|
// PKCS8.cs: PKCS #8 - Private-Key Information Syntax Standard
|
|
// ftp://ftp.rsasecurity.com/pub/pkcs/doc/pkcs-8.doc
|
|
//
|
|
// Author:
|
|
// Sebastien Pouliot <sebastien@xamarin.com>
|
|
//
|
|
// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
|
|
// Copyright (C) 2004-2006 Novell Inc. (http://www.novell.com)
|
|
// Copyright 2013 Xamarin Inc. (http://www.xamarin.com)
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining
|
|
// a copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to
|
|
// permit persons to whom the Software is furnished to do so, subject to
|
|
// the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be
|
|
// included in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Security.Cryptography;
|
|
|
|
namespace Emby.Server.Core.Cryptography
|
|
{
|
|
|
|
public sealed class PKCS8 {
|
|
|
|
public enum KeyInfo {
|
|
PrivateKey,
|
|
EncryptedPrivateKey,
|
|
Unknown
|
|
}
|
|
|
|
private PKCS8 ()
|
|
{
|
|
}
|
|
|
|
static public KeyInfo GetType (byte[] data)
|
|
{
|
|
if (data == null)
|
|
throw new ArgumentNullException ("data");
|
|
|
|
KeyInfo ki = KeyInfo.Unknown;
|
|
try {
|
|
ASN1 top = new ASN1 (data);
|
|
if ((top.Tag == 0x30) && (top.Count > 0)) {
|
|
ASN1 firstLevel = top [0];
|
|
switch (firstLevel.Tag) {
|
|
case 0x02:
|
|
ki = KeyInfo.PrivateKey;
|
|
break;
|
|
case 0x30:
|
|
ki = KeyInfo.EncryptedPrivateKey;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
catch {
|
|
throw new CryptographicException ("invalid ASN.1 data");
|
|
}
|
|
return ki;
|
|
}
|
|
|
|
/*
|
|
* PrivateKeyInfo ::= SEQUENCE {
|
|
* version Version,
|
|
* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
|
|
* privateKey PrivateKey,
|
|
* attributes [0] IMPLICIT Attributes OPTIONAL
|
|
* }
|
|
*
|
|
* Version ::= INTEGER
|
|
*
|
|
* PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
*
|
|
* PrivateKey ::= OCTET STRING
|
|
*
|
|
* Attributes ::= SET OF Attribute
|
|
*/
|
|
public class PrivateKeyInfo {
|
|
|
|
private int _version;
|
|
private string _algorithm;
|
|
private byte[] _key;
|
|
private ArrayList _list;
|
|
|
|
public PrivateKeyInfo ()
|
|
{
|
|
_version = 0;
|
|
_list = new ArrayList ();
|
|
}
|
|
|
|
public PrivateKeyInfo (byte[] data) : this ()
|
|
{
|
|
Decode (data);
|
|
}
|
|
|
|
// properties
|
|
|
|
public string Algorithm {
|
|
get { return _algorithm; }
|
|
set { _algorithm = value; }
|
|
}
|
|
|
|
public ArrayList Attributes {
|
|
get { return _list; }
|
|
}
|
|
|
|
public byte[] PrivateKey {
|
|
get {
|
|
if (_key == null)
|
|
return null;
|
|
return (byte[]) _key.Clone ();
|
|
}
|
|
set {
|
|
if (value == null)
|
|
throw new ArgumentNullException ("PrivateKey");
|
|
_key = (byte[]) value.Clone ();
|
|
}
|
|
}
|
|
|
|
public int Version {
|
|
get { return _version; }
|
|
set {
|
|
if (value < 0)
|
|
throw new ArgumentOutOfRangeException ("negative version");
|
|
_version = value;
|
|
}
|
|
}
|
|
|
|
// methods
|
|
|
|
private void Decode (byte[] data)
|
|
{
|
|
ASN1 privateKeyInfo = new ASN1 (data);
|
|
if (privateKeyInfo.Tag != 0x30)
|
|
throw new CryptographicException ("invalid PrivateKeyInfo");
|
|
|
|
ASN1 version = privateKeyInfo [0];
|
|
if (version.Tag != 0x02)
|
|
throw new CryptographicException ("invalid version");
|
|
_version = version.Value [0];
|
|
|
|
ASN1 privateKeyAlgorithm = privateKeyInfo [1];
|
|
if (privateKeyAlgorithm.Tag != 0x30)
|
|
throw new CryptographicException ("invalid algorithm");
|
|
|
|
ASN1 algorithm = privateKeyAlgorithm [0];
|
|
if (algorithm.Tag != 0x06)
|
|
throw new CryptographicException ("missing algorithm OID");
|
|
_algorithm = ASN1Convert.ToOid (algorithm);
|
|
|
|
ASN1 privateKey = privateKeyInfo [2];
|
|
_key = privateKey.Value;
|
|
|
|
// attributes [0] IMPLICIT Attributes OPTIONAL
|
|
if (privateKeyInfo.Count > 3) {
|
|
ASN1 attributes = privateKeyInfo [3];
|
|
for (int i=0; i < attributes.Count; i++) {
|
|
_list.Add (attributes [i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
public byte[] GetBytes ()
|
|
{
|
|
ASN1 privateKeyAlgorithm = new ASN1 (0x30);
|
|
privateKeyAlgorithm.Add (ASN1Convert.FromOid (_algorithm));
|
|
privateKeyAlgorithm.Add (new ASN1 (0x05)); // ASN.1 NULL
|
|
|
|
ASN1 pki = new ASN1 (0x30);
|
|
pki.Add (new ASN1 (0x02, new byte [1] { (byte) _version }));
|
|
pki.Add (privateKeyAlgorithm);
|
|
pki.Add (new ASN1 (0x04, _key));
|
|
|
|
if (_list.Count > 0) {
|
|
ASN1 attributes = new ASN1 (0xA0);
|
|
foreach (ASN1 attribute in _list) {
|
|
attributes.Add (attribute);
|
|
}
|
|
pki.Add (attributes);
|
|
}
|
|
|
|
return pki.GetBytes ();
|
|
}
|
|
|
|
// static methods
|
|
|
|
static private byte[] RemoveLeadingZero (byte[] bigInt)
|
|
{
|
|
int start = 0;
|
|
int length = bigInt.Length;
|
|
if (bigInt [0] == 0x00) {
|
|
start = 1;
|
|
length--;
|
|
}
|
|
byte[] bi = new byte [length];
|
|
Buffer.BlockCopy (bigInt, start, bi, 0, length);
|
|
return bi;
|
|
}
|
|
|
|
static private byte[] Normalize (byte[] bigInt, int length)
|
|
{
|
|
if (bigInt.Length == length)
|
|
return bigInt;
|
|
else if (bigInt.Length > length)
|
|
return RemoveLeadingZero (bigInt);
|
|
else {
|
|
// pad with 0
|
|
byte[] bi = new byte [length];
|
|
Buffer.BlockCopy (bigInt, 0, bi, (length - bigInt.Length), bigInt.Length);
|
|
return bi;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* }
|
|
*/
|
|
static public RSA DecodeRSA (byte[] keypair)
|
|
{
|
|
ASN1 privateKey = new ASN1 (keypair);
|
|
if (privateKey.Tag != 0x30)
|
|
throw new CryptographicException ("invalid private key format");
|
|
|
|
ASN1 version = privateKey [0];
|
|
if (version.Tag != 0x02)
|
|
throw new CryptographicException ("missing version");
|
|
|
|
if (privateKey.Count < 9)
|
|
throw new CryptographicException ("not enough key parameters");
|
|
|
|
RSAParameters param = new RSAParameters ();
|
|
// note: MUST remove leading 0 - else MS wont import the key
|
|
param.Modulus = RemoveLeadingZero (privateKey [1].Value);
|
|
int keysize = param.Modulus.Length;
|
|
int keysize2 = (keysize >> 1); // half-size
|
|
// size must be normalized - else MS wont import the key
|
|
param.D = Normalize (privateKey [3].Value, keysize);
|
|
param.DP = Normalize (privateKey [6].Value, keysize2);
|
|
param.DQ = Normalize (privateKey [7].Value, keysize2);
|
|
param.Exponent = RemoveLeadingZero (privateKey [2].Value);
|
|
param.InverseQ = Normalize (privateKey [8].Value, keysize2);
|
|
param.P = Normalize (privateKey [4].Value, keysize2);
|
|
param.Q = Normalize (privateKey [5].Value, keysize2);
|
|
|
|
RSA rsa = null;
|
|
try {
|
|
rsa = RSA.Create ();
|
|
rsa.ImportParameters (param);
|
|
}
|
|
catch (CryptographicException) {
|
|
// this may cause problem when this code is run under
|
|
// the SYSTEM identity on Windows (e.g. ASP.NET). See
|
|
// http://bugzilla.ximian.com/show_bug.cgi?id=77559
|
|
CspParameters csp = new CspParameters();
|
|
csp.Flags = CspProviderFlags.UseMachineKeyStore;
|
|
rsa = new RSACryptoServiceProvider(csp);
|
|
rsa.ImportParameters(param);
|
|
}
|
|
return rsa;
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* }
|
|
*/
|
|
static public byte[] Encode (RSA rsa)
|
|
{
|
|
RSAParameters param = rsa.ExportParameters (true);
|
|
|
|
ASN1 rsaPrivateKey = new ASN1 (0x30);
|
|
rsaPrivateKey.Add (new ASN1 (0x02, new byte [1] { 0x00 }));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.Modulus));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.Exponent));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.D));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.P));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.Q));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.DP));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.DQ));
|
|
rsaPrivateKey.Add (ASN1Convert.FromUnsignedBigInteger (param.InverseQ));
|
|
|
|
return rsaPrivateKey.GetBytes ();
|
|
}
|
|
|
|
// DSA only encode it's X private key inside an ASN.1 INTEGER (Hint: Tag == 0x02)
|
|
// which isn't enough for rebuilding the keypair. The other parameters
|
|
// can be found (98% of the time) in the X.509 certificate associated
|
|
// with the private key or (2% of the time) the parameters are in it's
|
|
// issuer X.509 certificate (not supported in the .NET framework).
|
|
static public DSA DecodeDSA (byte[] privateKey, DSAParameters dsaParameters)
|
|
{
|
|
ASN1 pvk = new ASN1 (privateKey);
|
|
if (pvk.Tag != 0x02)
|
|
throw new CryptographicException ("invalid private key format");
|
|
|
|
// X is ALWAYS 20 bytes (no matter if the key length is 512 or 1024 bits)
|
|
dsaParameters.X = Normalize (pvk.Value, 20);
|
|
DSA dsa = DSA.Create ();
|
|
dsa.ImportParameters (dsaParameters);
|
|
return dsa;
|
|
}
|
|
|
|
static public byte[] Encode (DSA dsa)
|
|
{
|
|
DSAParameters param = dsa.ExportParameters (true);
|
|
return ASN1Convert.FromUnsignedBigInteger (param.X).GetBytes ();
|
|
}
|
|
|
|
static public byte[] Encode (AsymmetricAlgorithm aa)
|
|
{
|
|
if (aa is RSA)
|
|
return Encode ((RSA)aa);
|
|
else if (aa is DSA)
|
|
return Encode ((DSA)aa);
|
|
else
|
|
throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
|
|
}
|
|
}
|
|
|
|
/*
|
|
* EncryptedPrivateKeyInfo ::= SEQUENCE {
|
|
* encryptionAlgorithm EncryptionAlgorithmIdentifier,
|
|
* encryptedData EncryptedData
|
|
* }
|
|
*
|
|
* EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
*
|
|
* EncryptedData ::= OCTET STRING
|
|
*
|
|
* --
|
|
* AlgorithmIdentifier ::= SEQUENCE {
|
|
* algorithm OBJECT IDENTIFIER,
|
|
* parameters ANY DEFINED BY algorithm OPTIONAL
|
|
* }
|
|
*
|
|
* -- from PKCS#5
|
|
* PBEParameter ::= SEQUENCE {
|
|
* salt OCTET STRING SIZE(8),
|
|
* iterationCount INTEGER
|
|
* }
|
|
*/
|
|
public class EncryptedPrivateKeyInfo {
|
|
|
|
private string _algorithm;
|
|
private byte[] _salt;
|
|
private int _iterations;
|
|
private byte[] _data;
|
|
|
|
public EncryptedPrivateKeyInfo () {}
|
|
|
|
public EncryptedPrivateKeyInfo (byte[] data) : this ()
|
|
{
|
|
Decode (data);
|
|
}
|
|
|
|
// properties
|
|
|
|
public string Algorithm {
|
|
get { return _algorithm; }
|
|
set { _algorithm = value; }
|
|
}
|
|
|
|
public byte[] EncryptedData {
|
|
get { return (_data == null) ? null : (byte[]) _data.Clone (); }
|
|
set { _data = (value == null) ? null : (byte[]) value.Clone (); }
|
|
}
|
|
|
|
public byte[] Salt {
|
|
get {
|
|
if (_salt == null) {
|
|
RandomNumberGenerator rng = RandomNumberGenerator.Create ();
|
|
_salt = new byte [8];
|
|
rng.GetBytes (_salt);
|
|
}
|
|
return (byte[]) _salt.Clone ();
|
|
}
|
|
set { _salt = (byte[]) value.Clone (); }
|
|
}
|
|
|
|
public int IterationCount {
|
|
get { return _iterations; }
|
|
set {
|
|
if (value < 0)
|
|
throw new ArgumentOutOfRangeException ("IterationCount", "Negative");
|
|
_iterations = value;
|
|
}
|
|
}
|
|
|
|
// methods
|
|
|
|
private void Decode (byte[] data)
|
|
{
|
|
ASN1 encryptedPrivateKeyInfo = new ASN1 (data);
|
|
if (encryptedPrivateKeyInfo.Tag != 0x30)
|
|
throw new CryptographicException ("invalid EncryptedPrivateKeyInfo");
|
|
|
|
ASN1 encryptionAlgorithm = encryptedPrivateKeyInfo [0];
|
|
if (encryptionAlgorithm.Tag != 0x30)
|
|
throw new CryptographicException ("invalid encryptionAlgorithm");
|
|
ASN1 algorithm = encryptionAlgorithm [0];
|
|
if (algorithm.Tag != 0x06)
|
|
throw new CryptographicException ("invalid algorithm");
|
|
_algorithm = ASN1Convert.ToOid (algorithm);
|
|
// parameters ANY DEFINED BY algorithm OPTIONAL
|
|
if (encryptionAlgorithm.Count > 1) {
|
|
ASN1 parameters = encryptionAlgorithm [1];
|
|
if (parameters.Tag != 0x30)
|
|
throw new CryptographicException ("invalid parameters");
|
|
|
|
ASN1 salt = parameters [0];
|
|
if (salt.Tag != 0x04)
|
|
throw new CryptographicException ("invalid salt");
|
|
_salt = salt.Value;
|
|
|
|
ASN1 iterationCount = parameters [1];
|
|
if (iterationCount.Tag != 0x02)
|
|
throw new CryptographicException ("invalid iterationCount");
|
|
_iterations = ASN1Convert.ToInt32 (iterationCount);
|
|
}
|
|
|
|
ASN1 encryptedData = encryptedPrivateKeyInfo [1];
|
|
if (encryptedData.Tag != 0x04)
|
|
throw new CryptographicException ("invalid EncryptedData");
|
|
_data = encryptedData.Value;
|
|
}
|
|
|
|
// Note: PKCS#8 doesn't define how to generate the key required for encryption
|
|
// so you're on your own. Just don't try to copy the big guys too much ;)
|
|
// Netscape: http://www.cs.auckland.ac.nz/~pgut001/pubs/netscape.txt
|
|
// Microsoft: http://www.cs.auckland.ac.nz/~pgut001/pubs/breakms.txt
|
|
public byte[] GetBytes ()
|
|
{
|
|
if (_algorithm == null)
|
|
throw new CryptographicException ("No algorithm OID specified");
|
|
|
|
ASN1 encryptionAlgorithm = new ASN1 (0x30);
|
|
encryptionAlgorithm.Add (ASN1Convert.FromOid (_algorithm));
|
|
|
|
// parameters ANY DEFINED BY algorithm OPTIONAL
|
|
if ((_iterations > 0) || (_salt != null)) {
|
|
ASN1 salt = new ASN1 (0x04, _salt);
|
|
ASN1 iterations = ASN1Convert.FromInt32 (_iterations);
|
|
|
|
ASN1 parameters = new ASN1 (0x30);
|
|
parameters.Add (salt);
|
|
parameters.Add (iterations);
|
|
encryptionAlgorithm.Add (parameters);
|
|
}
|
|
|
|
// encapsulates EncryptedData into an OCTET STRING
|
|
ASN1 encryptedData = new ASN1 (0x04, _data);
|
|
|
|
ASN1 encryptedPrivateKeyInfo = new ASN1 (0x30);
|
|
encryptedPrivateKeyInfo.Add (encryptionAlgorithm);
|
|
encryptedPrivateKeyInfo.Add (encryptedData);
|
|
|
|
return encryptedPrivateKeyInfo.GetBytes ();
|
|
}
|
|
}
|
|
}
|
|
}
|