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PKCS12.cs
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PKCS12.cs
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//
// PKCS12.cs: PKCS 12 - Personal Information Exchange Syntax
//
// Author:
// Sebastien Pouliot <sebastien@xamarin.com>
//
// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004,2005,2006 Novell Inc. (http://www.novell.com)
// Copyright 2013 Xamarin Inc. (http://www.xamarin.com)
//
// Key derivation translated from Bouncy Castle JCE (http://www.bouncycastle.org/)
// See bouncycastle.txt for license.
//
// 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.IO;
using System.Security.Cryptography;
using System.Text;
using Mono.Security;
using Mono.Security.Cryptography;
namespace Mono.Security.X509 {
#if INSIDE_CORLIB || INSIDE_SYSTEM
internal
#else
public
#endif
class PKCS5 {
public const string pbeWithMD2AndDESCBC = "1.2.840.113549.1.5.1";
public const string pbeWithMD5AndDESCBC = "1.2.840.113549.1.5.3";
public const string pbeWithMD2AndRC2CBC = "1.2.840.113549.1.5.4";
public const string pbeWithMD5AndRC2CBC = "1.2.840.113549.1.5.6";
public const string pbeWithSHA1AndDESCBC = "1.2.840.113549.1.5.10";
public const string pbeWithSHA1AndRC2CBC = "1.2.840.113549.1.5.11";
public PKCS5 () {}
}
#if INSIDE_CORLIB || INSIDE_SYSTEM
internal
#else
public
#endif
class PKCS9 {
public const string friendlyName = "1.2.840.113549.1.9.20";
public const string localKeyId = "1.2.840.113549.1.9.21";
public PKCS9 () {}
}
internal class SafeBag {
private string _bagOID;
private ASN1 _asn1;
public SafeBag(string bagOID, ASN1 asn1) {
_bagOID = bagOID;
_asn1 = asn1;
}
public string BagOID {
get { return _bagOID; }
}
public ASN1 ASN1 {
get { return _asn1; }
}
}
#if INSIDE_CORLIB || INSIDE_SYSTEM
internal
#else
public
#endif
class PKCS12 : ICloneable {
public const string pbeWithSHAAnd128BitRC4 = "1.2.840.113549.1.12.1.1";
public const string pbeWithSHAAnd40BitRC4 = "1.2.840.113549.1.12.1.2";
public const string pbeWithSHAAnd3KeyTripleDESCBC = "1.2.840.113549.1.12.1.3";
public const string pbeWithSHAAnd2KeyTripleDESCBC = "1.2.840.113549.1.12.1.4";
public const string pbeWithSHAAnd128BitRC2CBC = "1.2.840.113549.1.12.1.5";
public const string pbeWithSHAAnd40BitRC2CBC = "1.2.840.113549.1.12.1.6";
// bags
public const string keyBag = "1.2.840.113549.1.12.10.1.1";
public const string pkcs8ShroudedKeyBag = "1.2.840.113549.1.12.10.1.2";
public const string certBag = "1.2.840.113549.1.12.10.1.3";
public const string crlBag = "1.2.840.113549.1.12.10.1.4";
public const string secretBag = "1.2.840.113549.1.12.10.1.5";
public const string safeContentsBag = "1.2.840.113549.1.12.10.1.6";
// types
public const string x509Certificate = "1.2.840.113549.1.9.22.1";
public const string sdsiCertificate = "1.2.840.113549.1.9.22.2";
public const string x509Crl = "1.2.840.113549.1.9.23.1";
// Adapted from BouncyCastle PKCS12ParametersGenerator.java
public class DeriveBytes {
public enum Purpose {
Key,
IV,
MAC
}
static private byte[] keyDiversifier = { 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 };
static private byte[] ivDiversifier = { 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2 };
static private byte[] macDiversifier = { 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 };
private string _hashName;
private int _iterations;
private byte[] _password;
private byte[] _salt;
public DeriveBytes () {}
public string HashName {
get { return _hashName; }
set { _hashName = value; }
}
public int IterationCount {
get { return _iterations; }
set { _iterations = value; }
}
public byte[] Password {
get { return (byte[]) _password.Clone (); }
set {
if (value == null)
_password = new byte [0];
else
_password = (byte[]) value.Clone ();
}
}
public byte[] Salt {
get { return (byte[]) _salt.Clone (); }
set {
if (value != null)
_salt = (byte[]) value.Clone ();
else
_salt = null;
}
}
private void Adjust (byte[] a, int aOff, byte[] b)
{
int x = (b[b.Length - 1] & 0xff) + (a [aOff + b.Length - 1] & 0xff) + 1;
a [aOff + b.Length - 1] = (byte) x;
x >>= 8;
for (int i = b.Length - 2; i >= 0; i--) {
x += (b [i] & 0xff) + (a [aOff + i] & 0xff);
a [aOff + i] = (byte) x;
x >>= 8;
}
}
private byte[] Derive (byte[] diversifier, int n)
{
HashAlgorithm digest = PKCS1.CreateFromName (_hashName);
int u = (digest.HashSize >> 3); // div 8
int v = 64;
byte[] dKey = new byte [n];
byte[] S;
if ((_salt != null) && (_salt.Length != 0)) {
S = new byte[v * ((_salt.Length + v - 1) / v)];
for (int i = 0; i != S.Length; i++) {
S[i] = _salt[i % _salt.Length];
}
}
else {
S = new byte[0];
}
byte[] P;
if ((_password != null) && (_password.Length != 0)) {
P = new byte[v * ((_password.Length + v - 1) / v)];
for (int i = 0; i != P.Length; i++) {
P[i] = _password[i % _password.Length];
}
}
else {
P = new byte[0];
}
byte[] I = new byte [S.Length + P.Length];
Buffer.BlockCopy (S, 0, I, 0, S.Length);
Buffer.BlockCopy (P, 0, I, S.Length, P.Length);
byte[] B = new byte[v];
int c = (n + u - 1) / u;
for (int i = 1; i <= c; i++) {
digest.TransformBlock (diversifier, 0, diversifier.Length, diversifier, 0);
digest.TransformFinalBlock (I, 0, I.Length);
byte[] A = digest.Hash;
digest.Initialize ();
for (int j = 1; j != _iterations; j++) {
A = digest.ComputeHash (A, 0, A.Length);
}
for (int j = 0; j != B.Length; j++) {
B [j] = A [j % A.Length];
}
for (int j = 0; j != I.Length / v; j++) {
Adjust (I, j * v, B);
}
if (i == c) {
Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, dKey.Length - ((i - 1) * u));
}
else {
Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, A.Length);
}
}
return dKey;
}
public byte[] DeriveKey (int size)
{
return Derive (keyDiversifier, size);
}
public byte[] DeriveIV (int size)
{
return Derive (ivDiversifier, size);
}
public byte[] DeriveMAC (int size)
{
return Derive (macDiversifier, size);
}
}
const int recommendedIterationCount = 2000;
//private int _version;
private byte[] _password;
private ArrayList _keyBags;
private ArrayList _secretBags;
private X509CertificateCollection _certs;
private bool _keyBagsChanged;
private bool _secretBagsChanged;
private bool _certsChanged;
private int _iterations;
private ArrayList _safeBags;
private RandomNumberGenerator _rng;
// constructors
public PKCS12 ()
{
_iterations = recommendedIterationCount;
_keyBags = new ArrayList ();
_secretBags = new ArrayList ();
_certs = new X509CertificateCollection ();
_keyBagsChanged = false;
_secretBagsChanged = false;
_certsChanged = false;
_safeBags = new ArrayList ();
}
public PKCS12 (byte[] data)
: this ()
{
Password = null;
Decode (data);
}
/*
* PFX ::= SEQUENCE {
* version INTEGER {v3(3)}(v3,...),
* authSafe ContentInfo,
* macData MacData OPTIONAL
* }
*
* MacData ::= SEQUENCE {
* mac DigestInfo,
* macSalt OCTET STRING,
* iterations INTEGER DEFAULT 1
* -- Note: The default is for historical reasons and its use is deprecated. A higher
* -- value, like 1024 is recommended.
* }
*
* SafeContents ::= SEQUENCE OF SafeBag
*
* SafeBag ::= SEQUENCE {
* bagId BAG-TYPE.&id ({PKCS12BagSet}),
* bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
* bagAttributes SET OF PKCS12Attribute OPTIONAL
* }
*/
public PKCS12 (byte[] data, string password)
: this ()
{
Password = password;
Decode (data);
}
public PKCS12 (byte[] data, byte[] password)
: this ()
{
_password = password;
Decode (data);
}
private void Decode (byte[] data)
{
ASN1 pfx = new ASN1 (data);
if (pfx.Tag != 0x30)
throw new ArgumentException ("invalid data");
ASN1 version = pfx [0];
if (version.Tag != 0x02)
throw new ArgumentException ("invalid PFX version");
//_version = version.Value [0];
PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (pfx [1]);
if (authSafe.ContentType != PKCS7.Oid.data)
throw new ArgumentException ("invalid authenticated safe");
// now that we know it's a PKCS#12 file, check the (optional) MAC
// before decoding anything else in the file
if (pfx.Count > 2) {
ASN1 macData = pfx [2];
if (macData.Tag != 0x30)
throw new ArgumentException ("invalid MAC");
ASN1 mac = macData [0];
if (mac.Tag != 0x30)
throw new ArgumentException ("invalid MAC");
ASN1 macAlgorithm = mac [0];
string macOid = ASN1Convert.ToOid (macAlgorithm [0]);
if (macOid != "1.3.14.3.2.26")
throw new ArgumentException ("unsupported HMAC");
byte[] macValue = mac [1].Value;
ASN1 macSalt = macData [1];
if (macSalt.Tag != 0x04)
throw new ArgumentException ("missing MAC salt");
_iterations = 1; // default value
if (macData.Count > 2) {
ASN1 iters = macData [2];
if (iters.Tag != 0x02)
throw new ArgumentException ("invalid MAC iteration");
_iterations = ASN1Convert.ToInt32 (iters);
}
byte[] authSafeData = authSafe.Content [0].Value;
byte[] calculatedMac = MAC (_password, macSalt.Value, _iterations, authSafeData);
if (!Compare (macValue, calculatedMac)) {
byte[] nullPassword = {0, 0};
calculatedMac = MAC(nullPassword, macSalt.Value, _iterations, authSafeData);
if (!Compare (macValue, calculatedMac))
throw new CryptographicException ("Invalid MAC - file may have been tampered with!");
_password = nullPassword;
}
}
// we now returns to our original presentation - PFX
ASN1 authenticatedSafe = new ASN1 (authSafe.Content [0].Value);
for (int i=0; i < authenticatedSafe.Count; i++) {
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (authenticatedSafe [i]);
switch (ci.ContentType) {
case PKCS7.Oid.data:
// unencrypted (by PKCS#12)
ASN1 safeContents = new ASN1 (ci.Content [0].Value);
for (int j=0; j < safeContents.Count; j++) {
ASN1 safeBag = safeContents [j];
ReadSafeBag (safeBag);
}
break;
case PKCS7.Oid.encryptedData:
// password encrypted
PKCS7.EncryptedData ed = new PKCS7.EncryptedData (ci.Content [0]);
ASN1 decrypted = new ASN1 (Decrypt (ed));
for (int j=0; j < decrypted.Count; j++) {
ASN1 safeBag = decrypted [j];
ReadSafeBag (safeBag);
}
break;
case PKCS7.Oid.envelopedData:
// public key encrypted
throw new NotImplementedException ("public key encrypted");
default:
throw new ArgumentException ("unknown authenticatedSafe");
}
}
}
~PKCS12 ()
{
if (_password != null) {
Array.Clear (_password, 0, _password.Length);
}
_password = null;
}
// properties
public string Password {
set {
// Clear old password.
if (_password != null)
Array.Clear (_password, 0, _password.Length);
_password = null;
if (value != null) {
if (value.Length > 0) {
int size = value.Length;
int nul = 0;
if (size < MaximumPasswordLength) {
// if not present, add space for a NULL (0x00) character
if (value[size - 1] != 0x00)
nul = 1;
} else {
size = MaximumPasswordLength;
}
_password = new byte[(size + nul) << 1]; // double for unicode
Encoding.BigEndianUnicode.GetBytes (value, 0, size, _password, 0);
} else {
// double-byte (Unicode) NULL (0x00) - see bug #79617
_password = new byte[2];
}
}
}
}
public int IterationCount {
get { return _iterations; }
set { _iterations = value; }
}
public ArrayList Keys {
get {
if (_keyBagsChanged) {
_keyBags.Clear ();
foreach (SafeBag sb in _safeBags) {
if (sb.BagOID.Equals (keyBag)) {
ASN1 safeBag = sb.ASN1;
ASN1 bagValue = safeBag [1];
PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
byte[] privateKey = pki.PrivateKey;
switch (privateKey [0]) {
case 0x02:
DSAParameters p = new DSAParameters (); // FIXME
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
break;
case 0x30:
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
break;
default:
break;
}
Array.Clear (privateKey, 0, privateKey.Length);
} else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
ASN1 safeBag = sb.ASN1;
ASN1 bagValue = safeBag [1];
PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
byte[] privateKey = pki.PrivateKey;
switch (privateKey [0]) {
case 0x02:
DSAParameters p = new DSAParameters (); // FIXME
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
break;
case 0x30:
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
break;
default:
break;
}
Array.Clear (privateKey, 0, privateKey.Length);
Array.Clear (decrypted, 0, decrypted.Length);
}
}
_keyBagsChanged = false;
}
return ArrayList.ReadOnly(_keyBags);
}
}
public ArrayList Secrets {
get {
if (_secretBagsChanged) {
_secretBags.Clear ();
foreach (SafeBag sb in _safeBags) {
if (sb.BagOID.Equals (secretBag)) {
ASN1 safeBag = sb.ASN1;
ASN1 bagValue = safeBag [1];
byte[] secret = bagValue.Value;
_secretBags.Add(secret);
}
}
_secretBagsChanged = false;
}
return ArrayList.ReadOnly(_secretBags);
}
}
public X509CertificateCollection Certificates {
get {
if (_certsChanged) {
_certs.Clear ();
foreach (SafeBag sb in _safeBags) {
if (sb.BagOID.Equals (certBag)) {
ASN1 safeBag = sb.ASN1;
ASN1 bagValue = safeBag [1];
PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
_certs.Add (new X509Certificate (cert.Content [0].Value));
}
}
_certsChanged = false;
}
return _certs;
}
}
internal RandomNumberGenerator RNG {
get {
if (_rng == null)
_rng = RandomNumberGenerator.Create ();
return _rng;
}
}
// private methods
private bool Compare (byte[] expected, byte[] actual)
{
bool compare = false;
if (expected.Length == actual.Length) {
for (int i=0; i < expected.Length; i++) {
if (expected [i] != actual [i])
return false;
}
compare = true;
}
return compare;
}
private SymmetricAlgorithm GetSymmetricAlgorithm (string algorithmOid, byte[] salt, int iterationCount)
{
string algorithm = null;
int keyLength = 8; // 64 bits (default)
int ivLength = 8; // 64 bits (default)
PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes ();
pd.Password = _password;
pd.Salt = salt;
pd.IterationCount = iterationCount;
switch (algorithmOid) {
case PKCS5.pbeWithMD2AndDESCBC: // no unit test available
pd.HashName = "MD2";
algorithm = "DES";
break;
case PKCS5.pbeWithMD5AndDESCBC: // no unit test available
pd.HashName = "MD5";
algorithm = "DES";
break;
case PKCS5.pbeWithMD2AndRC2CBC: // no unit test available
// TODO - RC2-CBC-Parameter (PKCS5)
// if missing default to 32 bits !!!
pd.HashName = "MD2";
algorithm = "RC2";
keyLength = 4; // default
break;
case PKCS5.pbeWithMD5AndRC2CBC: // no unit test available
// TODO - RC2-CBC-Parameter (PKCS5)
// if missing default to 32 bits !!!
pd.HashName = "MD5";
algorithm = "RC2";
keyLength = 4; // default
break;
case PKCS5.pbeWithSHA1AndDESCBC: // no unit test available
pd.HashName = "SHA1";
algorithm = "DES";
break;
case PKCS5.pbeWithSHA1AndRC2CBC: // no unit test available
// TODO - RC2-CBC-Parameter (PKCS5)
// if missing default to 32 bits !!!
pd.HashName = "SHA1";
algorithm = "RC2";
keyLength = 4; // default
break;
case PKCS12.pbeWithSHAAnd128BitRC4: // no unit test available
pd.HashName = "SHA1";
algorithm = "RC4";
keyLength = 16;
ivLength = 0; // N/A
break;
case PKCS12.pbeWithSHAAnd40BitRC4: // no unit test available
pd.HashName = "SHA1";
algorithm = "RC4";
keyLength = 5;
ivLength = 0; // N/A
break;
case PKCS12.pbeWithSHAAnd3KeyTripleDESCBC:
pd.HashName = "SHA1";
algorithm = "TripleDES";
keyLength = 24;
break;
case PKCS12.pbeWithSHAAnd2KeyTripleDESCBC: // no unit test available
pd.HashName = "SHA1";
algorithm = "TripleDES";
keyLength = 16;
break;
case PKCS12.pbeWithSHAAnd128BitRC2CBC: // no unit test available
pd.HashName = "SHA1";
algorithm = "RC2";
keyLength = 16;
break;
case PKCS12.pbeWithSHAAnd40BitRC2CBC:
pd.HashName = "SHA1";
algorithm = "RC2";
keyLength = 5;
break;
default:
throw new NotSupportedException ("unknown oid " + algorithm);
}
SymmetricAlgorithm sa = null;
#if INSIDE_CORLIB && FULL_AOT_RUNTIME
// we do not want CryptoConfig to bring the whole crypto stack
// in particular Rijndael which is not supported by CommonCrypto
switch (algorithm) {
case "DES":
sa = DES.Create ();
break;
case "RC2":
sa = RC2.Create ();
break;
case "TripleDES":
sa = TripleDES.Create ();
break;
case "RC4":
sa = RC4.Create ();
break;
default:
throw new NotSupportedException (algorithm);
}
#else
sa = SymmetricAlgorithm.Create (algorithm);
#endif
sa.Key = pd.DeriveKey (keyLength);
// IV required only for block ciphers (not stream ciphers)
if (ivLength > 0) {
sa.IV = pd.DeriveIV (ivLength);
sa.Mode = CipherMode.CBC;
}
return sa;
}
public byte[] Decrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] encryptedData)
{
SymmetricAlgorithm sa = null;
byte[] result = null;
try {
sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount);
ICryptoTransform ct = sa.CreateDecryptor ();
result = ct.TransformFinalBlock (encryptedData, 0, encryptedData.Length);
}
finally {
if (sa != null)
sa.Clear ();
}
return result;
}
public byte[] Decrypt (PKCS7.EncryptedData ed)
{
return Decrypt (ed.EncryptionAlgorithm.ContentType,
ed.EncryptionAlgorithm.Content [0].Value,
ASN1Convert.ToInt32 (ed.EncryptionAlgorithm.Content [1]),
ed.EncryptedContent);
}
public byte[] Encrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] data)
{
byte[] result = null;
using (SymmetricAlgorithm sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount)) {
ICryptoTransform ct = sa.CreateEncryptor ();
result = ct.TransformFinalBlock (data, 0, data.Length);
}
return result;
}
private DSAParameters GetExistingParameters (out bool found)
{
foreach (X509Certificate cert in Certificates) {
// FIXME: that won't work if parts of the parameters are missing
if (cert.KeyAlgorithmParameters != null) {
DSA dsa = cert.DSA;
if (dsa != null) {
found = true;
return dsa.ExportParameters (false);
}
}
}
found = false;
return new DSAParameters ();
}
private void AddPrivateKey (PKCS8.PrivateKeyInfo pki)
{
byte[] privateKey = pki.PrivateKey;
try {
switch (pki.Algorithm) {
case X509Certificate.OID_RSA:
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
break;
case X509Certificate.OID_DSA:
bool found;
DSAParameters p = GetExistingParameters (out found);
if (found) {
_keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
}
break;
case X509Certificate.OID_ECC: // TODO
default:
throw new CryptographicException ("Unknown private key format");
}
}
finally {
Array.Clear (privateKey, 0, privateKey.Length);
}
}
private void ReadSafeBag (ASN1 safeBag)
{
if (safeBag.Tag != 0x30)
throw new ArgumentException ("invalid safeBag");
ASN1 bagId = safeBag [0];
if (bagId.Tag != 0x06)
throw new ArgumentException ("invalid safeBag id");
ASN1 bagValue = safeBag [1];
string oid = ASN1Convert.ToOid (bagId);
switch (oid) {
case keyBag:
// NEED UNIT TEST
AddPrivateKey (new PKCS8.PrivateKeyInfo (bagValue.Value));
break;
case pkcs8ShroudedKeyBag:
PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
AddPrivateKey (new PKCS8.PrivateKeyInfo (decrypted));
Array.Clear (decrypted, 0, decrypted.Length);
break;
case certBag:
PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
if (cert.ContentType != x509Certificate)
throw new NotSupportedException ("unsupport certificate type");
X509Certificate x509 = new X509Certificate (cert.Content [0].Value);
_certs.Add (x509);
break;
case crlBag:
// TODO
break;
case secretBag:
byte[] secret = bagValue.Value;
_secretBags.Add(secret);
break;
case safeContentsBag:
// TODO - ? recurse ?
break;
default:
throw new ArgumentException ("unknown safeBag oid");
}
if (safeBag.Count > 2) {
ASN1 bagAttributes = safeBag [2];
if (bagAttributes.Tag != 0x31)
throw new ArgumentException ("invalid safeBag attributes id");
for (int i = 0; i < bagAttributes.Count; i++) {
ASN1 pkcs12Attribute = bagAttributes[i];
if (pkcs12Attribute.Tag != 0x30)
throw new ArgumentException ("invalid PKCS12 attributes id");
ASN1 attrId = pkcs12Attribute [0];
if (attrId.Tag != 0x06)
throw new ArgumentException ("invalid attribute id");
string attrOid = ASN1Convert.ToOid (attrId);
ASN1 attrValues = pkcs12Attribute[1];
for (int j = 0; j < attrValues.Count; j++) {
ASN1 attrValue = attrValues[j];
switch (attrOid) {
case PKCS9.friendlyName:
if (attrValue.Tag != 0x1e)
throw new ArgumentException ("invalid attribute value id");
break;
case PKCS9.localKeyId:
if (attrValue.Tag != 0x04)
throw new ArgumentException ("invalid attribute value id");
break;
default:
// Unknown OID -- don't check Tag
break;
}
}
}
}
_safeBags.Add (new SafeBag(oid, safeBag));
}
private ASN1 Pkcs8ShroudedKeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
{
PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
if (aa is RSA) {
pki.Algorithm = "1.2.840.113549.1.1.1";
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
}
else if (aa is DSA) {
pki.Algorithm = null;
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
}
else
throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo ();
epki.Algorithm = pbeWithSHAAnd3KeyTripleDESCBC;
epki.IterationCount = _iterations;
epki.EncryptedData = Encrypt (pbeWithSHAAnd3KeyTripleDESCBC, epki.Salt, _iterations, pki.GetBytes ());
ASN1 safeBag = new ASN1 (0x30);
safeBag.Add (ASN1Convert.FromOid (pkcs8ShroudedKeyBag));
ASN1 bagValue = new ASN1 (0xA0);
bagValue.Add (new ASN1 (epki.GetBytes ()));
safeBag.Add (bagValue);
if (attributes != null) {
ASN1 bagAttributes = new ASN1 (0x31);
IDictionaryEnumerator de = attributes.GetEnumerator ();
while (de.MoveNext ()) {
string oid = (string)de.Key;
switch (oid) {
case PKCS9.friendlyName:
ArrayList names = (ArrayList)de.Value;
if (names.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] name in names) {
ASN1 attrValue = new ASN1 (0x1e);
attrValue.Value = name;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
case PKCS9.localKeyId:
ArrayList keys = (ArrayList)de.Value;
if (keys.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] key in keys) {
ASN1 attrValue = new ASN1 (0x04);
attrValue.Value = key;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
default:
break;
}
}
if (bagAttributes.Count > 0) {
safeBag.Add (bagAttributes);
}
}
return safeBag;
}
private ASN1 KeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
{
PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
if (aa is RSA) {
pki.Algorithm = "1.2.840.113549.1.1.1";
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
}
else if (aa is DSA) {
pki.Algorithm = null;
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
}
else
throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
ASN1 safeBag = new ASN1 (0x30);
safeBag.Add (ASN1Convert.FromOid (keyBag));
ASN1 bagValue = new ASN1 (0xA0);
bagValue.Add (new ASN1 (pki.GetBytes ()));
safeBag.Add (bagValue);
if (attributes != null) {
ASN1 bagAttributes = new ASN1 (0x31);
IDictionaryEnumerator de = attributes.GetEnumerator ();
while (de.MoveNext ()) {
string oid = (string)de.Key;
switch (oid) {
case PKCS9.friendlyName:
ArrayList names = (ArrayList)de.Value;
if (names.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] name in names) {
ASN1 attrValue = new ASN1 (0x1e);
attrValue.Value = name;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
case PKCS9.localKeyId:
ArrayList keys = (ArrayList)de.Value;
if (keys.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] key in keys) {
ASN1 attrValue = new ASN1 (0x04);
attrValue.Value = key;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
default:
break;
}
}
if (bagAttributes.Count > 0) {
safeBag.Add (bagAttributes);
}
}
return safeBag;
}
private ASN1 SecretBagSafeBag (byte[] secret, IDictionary attributes)
{
ASN1 safeBag = new ASN1 (0x30);
safeBag.Add (ASN1Convert.FromOid (secretBag));
ASN1 bagValue = new ASN1 (0x80, secret);
safeBag.Add (bagValue);