public EnvelopedData()
{
this._version = 0;
this._content = new PKCS7.ContentInfo();
this._encryptionAlgorithm = new PKCS7.ContentInfo();
this._recipientInfos = new ArrayList();
}
public SignedData()
{
this.version = 1;
this.contentInfo = new PKCS7.ContentInfo();
this.certs = new X509CertificateCollection();
this.crls = new ArrayList();
this.signerInfo = new PKCS7.SignerInfo();
this.mda = true;
this.signed = false;
}
public EnvelopedData(ASN1 asn1) : this()
{
if (asn1[0].Tag != 48 || asn1[0].Count < 3)
{
throw new ArgumentException("Invalid EnvelopedData");
}
if (asn1[0][0].Tag != 2)
{
throw new ArgumentException("Invalid version");
}
this._version = asn1[0][0].Value[0];
ASN1 asn2 = asn1[0][1];
if (asn2.Tag != 49)
{
throw new ArgumentException("missing RecipientInfos");
}
for (int i = 0; i < asn2.Count; i++)
{
ASN1 data = asn2[i];
this._recipientInfos.Add(new PKCS7.RecipientInfo(data));
}
ASN1 asn3 = asn1[0][2];
if (asn3.Tag != 48)
{
throw new ArgumentException("missing EncryptedContentInfo");
}
ASN1 asn4 = asn3[0];
if (asn4.Tag != 6)
{
throw new ArgumentException("missing EncryptedContentInfo.ContentType");
}
this._content = new PKCS7.ContentInfo(ASN1Convert.ToOid(asn4));
ASN1 asn5 = asn3[1];
if (asn5.Tag != 48)
{
throw new ArgumentException("missing EncryptedContentInfo.ContentEncryptionAlgorithmIdentifier");
}
this._encryptionAlgorithm = new PKCS7.ContentInfo(ASN1Convert.ToOid(asn5[0]));
this._encryptionAlgorithm.Content = asn5[1];
ASN1 asn6 = asn3[2];
if (asn6.Tag != 128)
{
throw new ArgumentException("missing EncryptedContentInfo.EncryptedContent");
}
this._encrypted = asn6.Value;
}
public SignedData(ASN1 asn1)
{
if (asn1[0].Tag != 48 || asn1[0].Count < 4)
{
throw new ArgumentException("Invalid SignedData");
}
if (asn1[0][0].Tag != 2)
{
throw new ArgumentException("Invalid version");
}
this.version = asn1[0][0].Value[0];
this.contentInfo = new PKCS7.ContentInfo(asn1[0][2]);
int num = 3;
this.certs = new X509CertificateCollection();
if (asn1[0][num].Tag == 160)
{
for (int i = 0; i < asn1[0][num].Count; i++)
{
this.certs.Add(new X509Certificate(asn1[0][num][i].GetBytes()));
}
num++;
}
this.crls = new ArrayList();
if (asn1[0][num].Tag == 161)
{
for (int j = 0; j < asn1[0][num].Count; j++)
{
this.crls.Add(asn1[0][num][j].GetBytes());
}
num++;
}
if (asn1[0][num].Count > 0)
{
this.signerInfo = new PKCS7.SignerInfo(asn1[0][num]);
}
else
{
this.signerInfo = new PKCS7.SignerInfo();
}
if (this.signerInfo.HashName != null)
{
this.HashName = this.OidToName(this.signerInfo.HashName);
}
this.mda = (this.signerInfo.AuthenticatedAttributes.Count > 0);
}
public EncryptedData(ASN1 asn1) : this()
{
if (asn1.Tag != 48 || asn1.Count < 2)
{
throw new ArgumentException("Invalid EncryptedData");
}
if (asn1[0].Tag != 2)
{
throw new ArgumentException("Invalid version");
}
this._version = asn1[0].Value[0];
ASN1 asn2 = asn1[1];
if (asn2.Tag != 48)
{
throw new ArgumentException("missing EncryptedContentInfo");
}
ASN1 asn3 = asn2[0];
if (asn3.Tag != 6)
{
throw new ArgumentException("missing EncryptedContentInfo.ContentType");
}
this._content = new PKCS7.ContentInfo(ASN1Convert.ToOid(asn3));
ASN1 asn4 = asn2[1];
if (asn4.Tag != 48)
{
throw new ArgumentException("missing EncryptedContentInfo.ContentEncryptionAlgorithmIdentifier");
}
this._encryptionAlgorithm = new PKCS7.ContentInfo(ASN1Convert.ToOid(asn4[0]));
this._encryptionAlgorithm.Content = asn4[1];
ASN1 asn5 = asn2[2];
if (asn5.Tag != 128)
{
throw new ArgumentException("missing EncryptedContentInfo.EncryptedContent");
}
this._encrypted = asn5.Value;
}
// 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 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 static Oid GetContentType (byte[] encodedMessage)
{
if (encodedMessage == null)
throw new ArgumentNullException ("algorithm");
try {
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (encodedMessage);
switch (ci.ContentType) {
case PKCS7.Oid.data:
case PKCS7.Oid.signedData: // see SignedCms class
case PKCS7.Oid.envelopedData: // see EnvelopedCms class
case PKCS7.Oid.digestedData:
case PKCS7.Oid.encryptedData:
return new Oid (ci.ContentType);
default:
// Note: the constructor will accept any "valid" OID (but that
// doesn't mean it's a valid ContentType structure - ASN.1 wise).
string msg = Locale.GetText ("Bad ASN1 - invalid OID '{0}'");
throw new CryptographicException (String.Format (msg, ci.ContentType));
}
}
catch (Exception e) {
throw new CryptographicException (Locale.GetText ("Bad ASN1 - invalid structure"), e);
}
}
public ASN1 TimestampRequest (byte[] signature)
{
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (PKCS7.Oid.data);
ci.Content.Add (new ASN1 (0x04, signature));
return PKCS7.AlgorithmIdentifier (timestampCountersignature, ci.ASN1);
}
public void Decode (byte[] encodedMessage)
{
if (encodedMessage == null)
throw new ArgumentNullException ("encodedMessage");
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (encodedMessage);
if (ci.ContentType != PKCS7.Oid.envelopedData)
throw new Exception ("");
PKCS7.EnvelopedData ed = new PKCS7.EnvelopedData (ci.Content);
Oid oid = new Oid (ed.ContentInfo.ContentType);
_content = new ContentInfo (oid, new byte [0]); //ed.ContentInfo.Content.Value);
foreach (PKCS7.RecipientInfo ri in ed.RecipientInfos) {
Oid o = new Oid (ri.Oid);
AlgorithmIdentifier ai = new AlgorithmIdentifier (o);
SubjectIdentifier si = null;
if (ri.SubjectKeyIdentifier != null) {
si = new SubjectIdentifier (SubjectIdentifierType.SubjectKeyIdentifier, ri.SubjectKeyIdentifier);
}
else if ((ri.Issuer != null) && (ri.Serial != null)) {
X509IssuerSerial xis = GetIssuerSerial (ri.Issuer, ri.Serial);
si = new SubjectIdentifier (SubjectIdentifierType.IssuerAndSerialNumber, (object)xis);
}
KeyTransRecipientInfo _keyTrans = new KeyTransRecipientInfo (ri.Key, ai, si, ri.Version);
_recipients.Add (_keyTrans);
}
// TODO - Certificates
// TODO - UnprotectedAttributes
_version = ed.Version;
}
public bool Sign (string fileName)
{
try {
Open (fileName);
HashAlgorithm hash = HashAlgorithm.Create (Hash);
// 0 to 215 (216) then skip 4 (checksum)
byte[] digest = GetHash (hash);
byte[] signature = Header (digest, Hash);
if (timestamp != null) {
byte[] ts = Timestamp (signature);
// add timestamp information inside the current pkcs7 SignedData instance
// (this is possible because the data isn't yet signed)
ProcessTimestamp (ts);
}
PKCS7.ContentInfo sign = new PKCS7.ContentInfo (signedData);
sign.Content.Add (pkcs7.ASN1);
authenticode = sign.ASN1;
Close ();
return Save (fileName, authenticode.GetBytes ());
}
catch (Exception e) {
Console.WriteLine (e);
}
return false;
}
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;
}
public byte[] GetBytes ()
{
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (PKCS7.Oid.signedData);
ci.Content.Add (pkcs7.ASN1);
return ci.GetBytes ();
}
/*
* 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) {
byte[] certsSalt = new byte [8];
RNG.GetBytes (certsSalt);
ASN1 seqParams = new ASN1 (0x30);
seqParams.Add (new ASN1 (0x04, certsSalt));
seqParams.Add (ASN1Convert.FromInt32 (_iterations));
ASN1 seqPbe = new ASN1 (0x30);
seqPbe.Add (ASN1Convert.FromOid (pbeWithSHAAnd3KeyTripleDESCBC));
seqPbe.Add (seqParams);
byte[] encrypted = Encrypt (pbeWithSHAAnd3KeyTripleDESCBC, certsSalt, _iterations, certsSafeBag.GetBytes ());
ASN1 encryptedCerts = new ASN1 (0x80, encrypted);
ASN1 seq = new ASN1 (0x30);
seq.Add (ASN1Convert.FromOid (PKCS7.Oid.data));
seq.Add (seqPbe);
seq.Add (encryptedCerts);
ASN1 certsVersion = new ASN1 (0x02, new byte [1] { 0x00 });
ASN1 encData = new ASN1 (0x30);
encData.Add (certsVersion);
encData.Add (seq);
ASN1 certsContent = new ASN1 (0xA0);
certsContent.Add (encData);
PKCS7.ContentInfo bag = new PKCS7.ContentInfo (PKCS7.Oid.encryptedData);
bag.Content = certsContent;
safeBagSequence.Add (bag.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);
}
}
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 ();
}
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))
throw new CryptographicException ("Invalid MAC - file may have been tampered!");
}
// 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");
}
}
}
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:
// TODO
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));
}
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 bool Sign (string fileName)
{
string hashAlgorithm = "MD5";
byte[] file = null;
using (FileStream fs = new FileStream (fileName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
file = new byte [fs.Length];
fs.Read (file, 0, file.Length);
fs.Close ();
}
// MZ - DOS header
if (BitConverterLE.ToUInt16 (file, 0) != 0x5A4D)
return false;
// find offset of PE header
int peOffset = BitConverterLE.ToInt32 (file, 60);
if (peOffset > file.Length)
return false;
// PE - NT header
if (BitConverterLE.ToUInt16 (file, peOffset) != 0x4550)
return false;
// IMAGE_DIRECTORY_ENTRY_SECURITY
int dirSecurityOffset = BitConverterLE.ToInt32 (file, peOffset + 152);
int dirSecuritySize = BitConverterLE.ToInt32 (file, peOffset + 156);
if (dirSecuritySize > 8) {
entry = new byte [dirSecuritySize - 8];
Buffer.BlockCopy (file, dirSecurityOffset + 8, entry, 0, entry.Length);
}
else
entry = null;
HashAlgorithm hash = HashAlgorithm.Create (hashAlgorithm);
// 0 to 215 (216) then skip 4 (checksum)
int pe = peOffset + 88;
hash.TransformBlock (file, 0, pe, file, 0);
pe += 4;
// 220 to 279 (60) then skip 8 (IMAGE_DIRECTORY_ENTRY_SECURITY)
hash.TransformBlock (file, pe, 60, file, pe);
pe += 68;
// 288 to end of file
int n = file.Length - pe;
// minus any authenticode signature (with 8 bytes header)
if (dirSecurityOffset != 0)
n -= (dirSecuritySize);
hash.TransformFinalBlock (file, pe, n);
//
byte[] signature = Header (hash.Hash, hashAlgorithm);
if (timestamp != null) {
ASN1 tsreq = TimestampRequest (signature);
WebClient wc = new WebClient ();
wc.Headers.Add ("Content-Type", "application/octet-stream");
wc.Headers.Add ("Accept", "application/octet-stream");
byte[] tsdata = Encoding.ASCII.GetBytes (Convert.ToBase64String (tsreq.GetBytes ()));
byte[] tsres = wc.UploadData (timestamp.ToString (), tsdata);
ProcessTimestamp (tsres);
}
PKCS7.ContentInfo sign = new PKCS7.ContentInfo (signedData);
sign.Content.Add (pkcs7.ASN1);
authenticode = sign.ASN1;
byte[] asn = authenticode.GetBytes ();
#if DEBUG
using (FileStream fs = File.Open (fileName + ".sig", FileMode.Create, FileAccess.Write)) {
fs.Write (asn, 0, asn.Length);
fs.Close ();
}
#endif
// someday I may be sure enough to move this into DEBUG ;-)
File.Copy (fileName, fileName + ".bak", true);
using (FileStream fs = File.Open (fileName, FileMode.Create, FileAccess.Write)) {
int filesize = (dirSecurityOffset == 0) ? file.Length : dirSecurityOffset;
// IMAGE_DIRECTORY_ENTRY_SECURITY (offset, size)
byte[] data = BitConverterLE.GetBytes (filesize);
file [peOffset + 152] = data [0];
file [peOffset + 153] = data [1];
file [peOffset + 154] = data [2];
file [peOffset + 155] = data [3];
int size = asn.Length + 8;
// must be a multiple of 8 bytes
int addsize = (size % 8);
if (addsize > 0)
addsize = 8 - addsize;
size += addsize;
data = BitConverterLE.GetBytes (size); // header
file [peOffset + 156] = data [0];
file [peOffset + 157] = data [1];
file [peOffset + 158] = data [2];
file [peOffset + 159] = data [3];
fs.Write (file, 0, filesize);
fs.Write (data, 0, data.Length); // length (again)
data = BitConverterLE.GetBytes (0x00020200); // magic
fs.Write (data, 0, data.Length);
fs.Write (asn, 0, asn.Length);
// fill up
byte[] fillup = new byte [addsize];
fs.Write (fillup, 0, fillup.Length);
fs.Close ();
}
return true;
}
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;
}
}
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 SoftwarePublisherCertificate (byte[] data) : this ()
{
if (data == null)
throw new ArgumentNullException ("data");
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (data);
if (ci.ContentType != PKCS7.Oid.signedData) {
throw new ArgumentException (
Locale.GetText ("Unsupported ContentType"));
}
pkcs7 = new PKCS7.SignedData (ci.Content);
}
// in case we just want to timestamp the file
public bool Timestamp (string fileName)
{
try {
AuthenticodeDeformatter def = new AuthenticodeDeformatter (fileName);
byte[] signature = def.Signature;
if (signature != null) {
Open (fileName);
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (signature);
pkcs7 = new PKCS7.SignedData (ci.Content);
byte[] response = Timestamp (pkcs7.SignerInfo.Signature);
ASN1 ts = new ASN1 (Convert.FromBase64String (Encoding.ASCII.GetString (response)));
// insert new certificates and countersignature into the original signature
ASN1 asn = new ASN1 (signature);
ASN1 content = asn.Element (1, 0xA0);
if (content == null)
return false;
ASN1 signedData = content.Element (0, 0x30);
if (signedData == null)
return false;
// add the supplied certificates inside our signature
ASN1 certificates = signedData.Element (3, 0xA0);
if (certificates == null) {
certificates = new ASN1 (0xA0);
signedData.Add (certificates);
}
for (int i = 0; i < ts[1][0][3].Count; i++) {
certificates.Add (ts[1][0][3][i]);
}
// add an unauthentified attribute to our signature
ASN1 signerInfoSet = signedData[signedData.Count - 1];
ASN1 signerInfo = signerInfoSet[0];
ASN1 unauthenticated = signerInfo[signerInfo.Count - 1];
if (unauthenticated.Tag != 0xA1) {
unauthenticated = new ASN1 (0xA1);
signerInfo.Add (unauthenticated);
}
unauthenticated.Add (Attribute (countersignature, ts[1][0][4][0]));
return Save (fileName, asn.GetBytes ());
}
}
catch (Exception e) {
Console.WriteLine (e);
}
return false;
}
public void Decode (byte[] encodedMessage)
{
PKCS7.ContentInfo ci = new PKCS7.ContentInfo (encodedMessage);
if (ci.ContentType != PKCS7.Oid.signedData)
throw new Exception ("");
PKCS7.SignedData sd = new PKCS7.SignedData (ci.Content);
SubjectIdentifierType type = SubjectIdentifierType.Unknown;
object o = null;
X509Certificate2 x509 = null;
if (sd.SignerInfo.Certificate != null) {
x509 = new X509Certificate2 (sd.SignerInfo.Certificate.RawData);
}
else if ((sd.SignerInfo.IssuerName != null) && (sd.SignerInfo.SerialNumber != null)) {
byte[] serial = sd.SignerInfo.SerialNumber;
Array.Reverse (serial); // ???
type = SubjectIdentifierType.IssuerAndSerialNumber;
X509IssuerSerial xis = new X509IssuerSerial ();
xis.IssuerName = sd.SignerInfo.IssuerName;
xis.SerialNumber = ToString (serial, true);
o = xis;
// TODO: move to a FindCertificate (issuer, serial, collection)
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates) {
if (x.IssuerName == sd.SignerInfo.IssuerName) {
if (ToString (x.SerialNumber, true) == xis.SerialNumber) {
x509 = new X509Certificate2 (x.RawData);
break;
}
}
}
}
else if (sd.SignerInfo.SubjectKeyIdentifier != null) {
string ski = ToString (sd.SignerInfo.SubjectKeyIdentifier, false);
type = SubjectIdentifierType.SubjectKeyIdentifier;
o = (object) ski;
// TODO: move to a FindCertificate (ski, collection)
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates) {
if (ToString (GetKeyIdentifier (x), false) == ski) {
x509 = new X509Certificate2 (x.RawData);
break;
}
}
}
SignerInfo si = new SignerInfo (sd.SignerInfo.HashName, x509, type, o, sd.SignerInfo.Version);
// si.AuthenticatedAttributes
// si.UnauthenticatedAttributes
_info.Add (si);
ASN1 content = sd.ContentInfo.Content;
Oid oid = new Oid (sd.ContentInfo.ContentType);
_content = new ContentInfo (oid, content[0].Value);
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates) {
_certs.Add (new X509Certificate2 (x.RawData));
}
_version = sd.Version;
}
