// // PKCS12.cs: PKCS 12 - Personal Information Exchange Syntax // // Author: // Sebastien Pouliot // // (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; namespace Emby.Server.Core.Cryptography { public 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 () {} } public 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; } } } public 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 tampe red!"); _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; sa = SymmetricAlgorithm.Create(algorithm); 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; switch (privateKey [0]) { case 0x02: bool found; DSAParameters p = GetExistingParameters (out found); if (found) { _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p)); } break; case 0x30: _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey)); break; default: Array.Clear (privateKey, 0, privateKey.Length); throw new CryptographicException ("Unknown private key format"); } 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); 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 CertificateSafeBag (X509Certificate x509, IDictionary attributes) { ASN1 encapsulatedCertificate = new ASN1 (0x04, x509.RawData); PKCS7.ContentInfo ci = new PKCS7.ContentInfo (); ci.ContentType = x509Certificate; ci.Content.Add (encapsulatedCertificate); ASN1 bagValue = new ASN1 (0xA0); bagValue.Add (ci.ASN1); ASN1 safeBag = new ASN1 (0x30); safeBag.Add (ASN1Convert.FromOid (certBag)); 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 byte[] MAC (byte[] password, byte[] salt, int iterations, byte[] data) { PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes (); pd.HashName = "SHA1"; pd.Password = password; pd.Salt = salt; pd.IterationCount = iterations; HMACSHA1 hmac = (HMACSHA1) HMACSHA1.Create (); hmac.Key = pd.DeriveMAC (20); return hmac.ComputeHash (data, 0, data.Length); } /* * 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 byte[] GetBytes () { // TODO (incomplete) ASN1 safeBagSequence = new ASN1 (0x30); // Sync Safe Bag list since X509CertificateCollection may be updated ArrayList scs = new ArrayList (); 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); scs.Add (new X509Certificate (cert.Content [0].Value)); } } ArrayList addcerts = new ArrayList (); ArrayList removecerts = new ArrayList (); foreach (X509Certificate c in Certificates) { bool found = false; foreach (X509Certificate lc in scs) { if (Compare (c.RawData, lc.RawData)) { found = true; } } if (!found) { addcerts.Add (c); } } foreach (X509Certificate c in scs) { bool found = false; foreach (X509Certificate lc in Certificates) { if (Compare (c.RawData, lc.RawData)) { found = true; } } if (!found) { removecerts.Add (c); } } foreach (X509Certificate c in removecerts) { RemoveCertificate (c); } foreach (X509Certificate c in addcerts) { AddCertificate (c); } // Sync done if (_safeBags.Count > 0) { ASN1 certsSafeBag = new ASN1 (0x30); foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (certBag)) { certsSafeBag.Add (sb.ASN1); } } if (certsSafeBag.Count > 0) { PKCS7.ContentInfo contentInfo = EncryptedContentInfo (certsSafeBag, pbeWithSHAAnd3KeyTripleDESCBC); safeBagSequence.Add (contentInfo.ASN1); } } if (_safeBags.Count > 0) { ASN1 safeContents = new ASN1 (0x30); foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { safeContents.Add (sb.ASN1); } } if (safeContents.Count > 0) { ASN1 content = new ASN1 (0xA0); content.Add (new ASN1 (0x04, safeContents.GetBytes ())); PKCS7.ContentInfo keyBag = new PKCS7.ContentInfo (PKCS7.Oid.data); keyBag.Content = content; safeBagSequence.Add (keyBag.ASN1); } } // Doing SecretBags separately in case we want to change their encryption independently. if (_safeBags.Count > 0) { ASN1 secretsSafeBag = new ASN1 (0x30); foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (secretBag)) { secretsSafeBag.Add (sb.ASN1); } } if (secretsSafeBag.Count > 0) { PKCS7.ContentInfo contentInfo = EncryptedContentInfo (secretsSafeBag, pbeWithSHAAnd3KeyTripleDESCBC); safeBagSequence.Add (contentInfo.ASN1); } } ASN1 encapsulates = new ASN1 (0x04, safeBagSequence.GetBytes ()); ASN1 ci = new ASN1 (0xA0); ci.Add (encapsulates); PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (PKCS7.Oid.data); authSafe.Content = ci; ASN1 macData = new ASN1 (0x30); if (_password != null) { // only for password based encryption byte[] salt = new byte [20]; RNG.GetBytes (salt); byte[] macValue = MAC (_password, salt, _iterations, authSafe.Content [0].Value); ASN1 oidSeq = new ASN1 (0x30); oidSeq.Add (ASN1Convert.FromOid ("1.3.14.3.2.26")); // SHA1 oidSeq.Add (new ASN1 (0x05)); ASN1 mac = new ASN1 (0x30); mac.Add (oidSeq); mac.Add (new ASN1 (0x04, macValue)); macData.Add (mac); macData.Add (new ASN1 (0x04, salt)); macData.Add (ASN1Convert.FromInt32 (_iterations)); } ASN1 version = new ASN1 (0x02, new byte [1] { 0x03 }); ASN1 pfx = new ASN1 (0x30); pfx.Add (version); pfx.Add (authSafe.ASN1); if (macData.Count > 0) { // only for password based encryption pfx.Add (macData); } return pfx.GetBytes (); } // Creates an encrypted PKCS#7 ContentInfo with safeBags as its SafeContents. Used in GetBytes(), above. private PKCS7.ContentInfo EncryptedContentInfo(ASN1 safeBags, string algorithmOid) { byte[] salt = new byte [8]; RNG.GetBytes (salt); ASN1 seqParams = new ASN1 (0x30); seqParams.Add (new ASN1 (0x04, salt)); seqParams.Add (ASN1Convert.FromInt32 (_iterations)); ASN1 seqPbe = new ASN1 (0x30); seqPbe.Add (ASN1Convert.FromOid (algorithmOid)); seqPbe.Add (seqParams); byte[] encrypted = Encrypt (algorithmOid, salt, _iterations, safeBags.GetBytes ()); ASN1 encryptedContent = new ASN1 (0x80, encrypted); ASN1 seq = new ASN1 (0x30); seq.Add (ASN1Convert.FromOid (PKCS7.Oid.data)); seq.Add (seqPbe); seq.Add (encryptedContent); ASN1 version = new ASN1 (0x02, new byte [1] { 0x00 }); ASN1 encData = new ASN1 (0x30); encData.Add (version); encData.Add (seq); ASN1 finalContent = new ASN1 (0xA0); finalContent.Add (encData); PKCS7.ContentInfo bag = new PKCS7.ContentInfo (PKCS7.Oid.encryptedData); bag.Content = finalContent; return bag; } public void AddCertificate (X509Certificate cert) { AddCertificate (cert, null); } public void AddCertificate (X509Certificate cert, IDictionary attributes) { bool found = false; for (int i = 0; !found && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (certBag)) { ASN1 safeBag = sb.ASN1; ASN1 bagValue = safeBag [1]; PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value); X509Certificate c = new X509Certificate (crt.Content [0].Value); if (Compare (cert.RawData, c.RawData)) { found = true; } } } if (!found) { _safeBags.Add (new SafeBag (certBag, CertificateSafeBag (cert, attributes))); _certsChanged = true; } } public void RemoveCertificate (X509Certificate cert) { RemoveCertificate (cert, null); } public void RemoveCertificate (X509Certificate cert, IDictionary attrs) { int certIndex = -1; for (int i = 0; certIndex == -1 && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (certBag)) { ASN1 safeBag = sb.ASN1; ASN1 bagValue = safeBag [1]; PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value); X509Certificate c = new X509Certificate (crt.Content [0].Value); if (Compare (cert.RawData, c.RawData)) { if (attrs != null) { if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; int bagAttributesFound = 0; for (int j = 0; j < bagAttributes.Count; j++) { ASN1 pkcs12Attribute = bagAttributes [j]; ASN1 attrId = pkcs12Attribute [0]; string ao = ASN1Convert.ToOid (attrId); ArrayList dattrValues = (ArrayList)attrs [ao]; if (dattrValues != null) { ASN1 attrValues = pkcs12Attribute [1]; if (dattrValues.Count == attrValues.Count) { int attrValuesFound = 0; for (int k = 0; k < attrValues.Count; k++) { ASN1 attrValue = attrValues [k]; byte[] value = (byte[])dattrValues [k]; if (Compare (value, attrValue.Value)) { attrValuesFound += 1; } } if (attrValuesFound == attrValues.Count) { bagAttributesFound += 1; } } } } if (bagAttributesFound == bagAttributes.Count) { certIndex = i; } } } else { certIndex = i; } } } } if (certIndex != -1) { _safeBags.RemoveAt (certIndex); _certsChanged = true; } } private bool CompareAsymmetricAlgorithm (AsymmetricAlgorithm a1, AsymmetricAlgorithm a2) { // fast path if (a1.KeySize != a2.KeySize) return false; // compare public keys - if they match we can assume the private match too return (a1.ToXmlString (false) == a2.ToXmlString (false)); } public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa) { AddPkcs8ShroudedKeyBag (aa, null); } public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa, IDictionary attributes) { bool found = false; for (int i = 0; !found && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { ASN1 bagValue = sb.ASN1 [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; AsymmetricAlgorithm saa = null; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: Array.Clear (decrypted, 0, decrypted.Length); Array.Clear (privateKey, 0, privateKey.Length); throw new CryptographicException ("Unknown private key format"); } Array.Clear (decrypted, 0, decrypted.Length); Array.Clear (privateKey, 0, privateKey.Length); if (CompareAsymmetricAlgorithm (aa , saa)) { found = true; } } } if (!found) { _safeBags.Add (new SafeBag (pkcs8ShroudedKeyBag, Pkcs8ShroudedKeyBagSafeBag (aa, attributes))); _keyBagsChanged = true; } } public void RemovePkcs8ShroudedKeyBag (AsymmetricAlgorithm aa) { int aaIndex = -1; for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { ASN1 bagValue = sb.ASN1 [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; AsymmetricAlgorithm saa = null; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: Array.Clear (decrypted, 0, decrypted.Length); Array.Clear (privateKey, 0, privateKey.Length); throw new CryptographicException ("Unknown private key format"); } Array.Clear (decrypted, 0, decrypted.Length); Array.Clear (privateKey, 0, privateKey.Length); if (CompareAsymmetricAlgorithm (aa, saa)) { aaIndex = i; } } } if (aaIndex != -1) { _safeBags.RemoveAt (aaIndex); _keyBagsChanged = true; } } public void AddKeyBag (AsymmetricAlgorithm aa) { AddKeyBag (aa, null); } public void AddKeyBag (AsymmetricAlgorithm aa, IDictionary attributes) { bool found = false; for (int i = 0; !found && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (keyBag)) { ASN1 bagValue = sb.ASN1 [1]; PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value); byte[] privateKey = pki.PrivateKey; AsymmetricAlgorithm saa = null; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: Array.Clear (privateKey, 0, privateKey.Length); throw new CryptographicException ("Unknown private key format"); } Array.Clear (privateKey, 0, privateKey.Length); if (CompareAsymmetricAlgorithm (aa, saa)) { found = true; } } } if (!found) { _safeBags.Add (new SafeBag (keyBag, KeyBagSafeBag (aa, attributes))); _keyBagsChanged = true; } } public void RemoveKeyBag (AsymmetricAlgorithm aa) { int aaIndex = -1; for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (keyBag)) { ASN1 bagValue = sb.ASN1 [1]; PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value); byte[] privateKey = pki.PrivateKey; AsymmetricAlgorithm saa = null; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: Array.Clear (privateKey, 0, privateKey.Length); throw new CryptographicException ("Unknown private key format"); } Array.Clear (privateKey, 0, privateKey.Length); if (CompareAsymmetricAlgorithm (aa, saa)) { aaIndex = i; } } } if (aaIndex != -1) { _safeBags.RemoveAt (aaIndex); _keyBagsChanged = true; } } public void AddSecretBag (byte[] secret) { AddSecretBag (secret, null); } public void AddSecretBag (byte[] secret, IDictionary attributes) { bool found = false; for (int i = 0; !found && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (secretBag)) { ASN1 bagValue = sb.ASN1 [1]; byte[] ssecret = bagValue.Value; if (Compare (secret, ssecret)) { found = true; } } } if (!found) { _safeBags.Add (new SafeBag (secretBag, SecretBagSafeBag (secret, attributes))); _secretBagsChanged = true; } } public void RemoveSecretBag (byte[] secret) { int sIndex = -1; for (int i = 0; sIndex == -1 && i < _safeBags.Count; i++) { SafeBag sb = (SafeBag)_safeBags [i]; if (sb.BagOID.Equals (secretBag)) { ASN1 bagValue = sb.ASN1 [1]; byte[] ssecret = bagValue.Value; if (Compare (secret, ssecret)) { sIndex = i; } } } if (sIndex != -1) { _safeBags.RemoveAt (sIndex); _secretBagsChanged = true; } } public AsymmetricAlgorithm GetAsymmetricAlgorithm (IDictionary attrs) { foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { ASN1 safeBag = sb.ASN1; if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; int bagAttributesFound = 0; for (int i = 0; i < bagAttributes.Count; i++) { ASN1 pkcs12Attribute = bagAttributes [i]; ASN1 attrId = pkcs12Attribute [0]; string ao = ASN1Convert.ToOid (attrId); ArrayList dattrValues = (ArrayList)attrs [ao]; if (dattrValues != null) { ASN1 attrValues = pkcs12Attribute [1]; if (dattrValues.Count == attrValues.Count) { int attrValuesFound = 0; for (int j = 0; j < attrValues.Count; j++) { ASN1 attrValue = attrValues [j]; byte[] value = (byte[])dattrValues [j]; if (Compare (value, attrValue.Value)) { attrValuesFound += 1; } } if (attrValuesFound == attrValues.Count) { bagAttributesFound += 1; } } } } if (bagAttributesFound == bagAttributes.Count) { ASN1 bagValue = safeBag [1]; AsymmetricAlgorithm aa = null; if (sb.BagOID.Equals (keyBag)) { PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value); byte[] privateKey = pki.PrivateKey; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: break; } Array.Clear (privateKey, 0, privateKey.Length); } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { 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 aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: break; } Array.Clear (privateKey, 0, privateKey.Length); Array.Clear (decrypted, 0, decrypted.Length); } return aa; } } } } return null; } public byte[] GetSecret (IDictionary attrs) { foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (secretBag)) { ASN1 safeBag = sb.ASN1; if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; int bagAttributesFound = 0; for (int i = 0; i < bagAttributes.Count; i++) { ASN1 pkcs12Attribute = bagAttributes [i]; ASN1 attrId = pkcs12Attribute [0]; string ao = ASN1Convert.ToOid (attrId); ArrayList dattrValues = (ArrayList)attrs [ao]; if (dattrValues != null) { ASN1 attrValues = pkcs12Attribute [1]; if (dattrValues.Count == attrValues.Count) { int attrValuesFound = 0; for (int j = 0; j < attrValues.Count; j++) { ASN1 attrValue = attrValues [j]; byte[] value = (byte[])dattrValues [j]; if (Compare (value, attrValue.Value)) { attrValuesFound += 1; } } if (attrValuesFound == attrValues.Count) { bagAttributesFound += 1; } } } } if (bagAttributesFound == bagAttributes.Count) { ASN1 bagValue = safeBag [1]; return bagValue.Value; } } } } return null; } public X509Certificate GetCertificate (IDictionary attrs) { foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (certBag)) { ASN1 safeBag = sb.ASN1; if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; int bagAttributesFound = 0; for (int i = 0; i < bagAttributes.Count; i++) { ASN1 pkcs12Attribute = bagAttributes [i]; ASN1 attrId = pkcs12Attribute [0]; string ao = ASN1Convert.ToOid (attrId); ArrayList dattrValues = (ArrayList)attrs [ao]; if (dattrValues != null) { ASN1 attrValues = pkcs12Attribute [1]; if (dattrValues.Count == attrValues.Count) { int attrValuesFound = 0; for (int j = 0; j < attrValues.Count; j++) { ASN1 attrValue = attrValues [j]; byte[] value = (byte[])dattrValues [j]; if (Compare (value, attrValue.Value)) { attrValuesFound += 1; } } if (attrValuesFound == attrValues.Count) { bagAttributesFound += 1; } } } } if (bagAttributesFound == bagAttributes.Count) { ASN1 bagValue = safeBag [1]; PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value); return new X509Certificate (crt.Content [0].Value); } } } } return null; } public IDictionary GetAttributes (AsymmetricAlgorithm aa) { IDictionary result = new Hashtable (); foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { ASN1 safeBag = sb.ASN1; ASN1 bagValue = safeBag [1]; AsymmetricAlgorithm saa = null; if (sb.BagOID.Equals (keyBag)) { PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value); byte[] privateKey = pki.PrivateKey; switch (privateKey [0]) { case 0x02: DSAParameters p = new DSAParameters (); // FIXME saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: break; } Array.Clear (privateKey, 0, privateKey.Length); } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) { 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 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p); break; case 0x30: saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey); break; default: break; } Array.Clear (privateKey, 0, privateKey.Length); Array.Clear (decrypted, 0, decrypted.Length); } if (saa != null && CompareAsymmetricAlgorithm (saa, aa)) { if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; for (int i = 0; i < bagAttributes.Count; i++) { ASN1 pkcs12Attribute = bagAttributes [i]; ASN1 attrId = pkcs12Attribute [0]; string aOid = ASN1Convert.ToOid (attrId); ArrayList aValues = new ArrayList (); ASN1 attrValues = pkcs12Attribute [1]; for (int j = 0; j < attrValues.Count; j++) { ASN1 attrValue = attrValues [j]; aValues.Add (attrValue.Value); } result.Add (aOid, aValues); } } } } } return result; } public IDictionary GetAttributes (X509Certificate cert) { IDictionary result = new Hashtable (); foreach (SafeBag sb in _safeBags) { if (sb.BagOID.Equals (certBag)) { ASN1 safeBag = sb.ASN1; ASN1 bagValue = safeBag [1]; PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value); X509Certificate xc = new X509Certificate (crt.Content [0].Value); if (Compare (cert.RawData, xc.RawData)) { if (safeBag.Count == 3) { ASN1 bagAttributes = safeBag [2]; for (int i = 0; i < bagAttributes.Count; i++) { ASN1 pkcs12Attribute = bagAttributes [i]; ASN1 attrId = pkcs12Attribute [0]; string aOid = ASN1Convert.ToOid (attrId); ArrayList aValues = new ArrayList (); ASN1 attrValues = pkcs12Attribute [1]; for (int j = 0; j < attrValues.Count; j++) { ASN1 attrValue = attrValues [j]; aValues.Add (attrValue.Value); } result.Add (aOid, aValues); } } } } } return result; } public void SaveToFile (string filename) { if (filename == null) throw new ArgumentNullException ("filename"); using (FileStream fs = File.Create (filename)) { byte[] data = GetBytes (); fs.Write (data, 0, data.Length); } } public object Clone () { PKCS12 clone = null; if (_password != null) { clone = new PKCS12 (GetBytes (), Encoding.BigEndianUnicode.GetString (_password)); } else { clone = new PKCS12 (GetBytes ()); } clone.IterationCount = this.IterationCount; return clone; } // static public const int CryptoApiPasswordLimit = 32; static private int password_max_length = Int32.MaxValue; // static properties // MS CryptoAPI limits the password to a maximum of 31 characters // other implementations, like OpenSSL, have no such limitation. // Setting a maximum value will truncate the password length to // ensure compatibility with MS's PFXImportCertStore API. static public int MaximumPasswordLength { get { return password_max_length; } set { if (value < CryptoApiPasswordLimit) { string msg = string.Format ("Maximum password length cannot be less than {0}.", CryptoApiPasswordLimit); throw new ArgumentOutOfRangeException (msg); } password_max_length = value; } } } }