if (offset >= blob.Length)
throw new ArgumentException ("blob is too small.");
+ RSAParameters rsap = new RSAParameters ();
try {
if ((blob [offset] != 0x07) || // PRIVATEKEYBLOB (0x07)
(blob [offset+1] != 0x02) || // Version (0x02)
int bitLen = ToInt32LE (blob, offset+12);
// DWORD public exponent
- RSAParameters rsap = new RSAParameters ();
byte[] exp = new byte [4];
Buffer.BlockCopy (blob, offset+16, exp, 0, 4);
Array.Reverse (exp);
Buffer.BlockCopy (blob, pos, rsap.D, 0, byteLen);
Array.Reverse (rsap.D);
}
+ }
+ catch (Exception e) {
+ throw new CryptographicException ("Invalid blob.", e);
+ }
- RSA rsa = null;
+ RSA rsa = null;
+ try {
+ rsa = RSA.Create ();
+ rsa.ImportParameters (rsap);
+ }
+ catch (CryptographicException ce) {
+ // this may cause problem when this code is run under
+ // the SYSTEM identity on Windows (e.g. ASP.NET). See
+ // http://bugzilla.ximian.com/show_bug.cgi?id=77559
try {
- rsa = RSA.Create ();
- rsa.ImportParameters (rsap);
- }
- catch (CryptographicException) {
- // this may cause problem when this code is run under
- // the SYSTEM identity on Windows (e.g. ASP.NET). See
- // http://bugzilla.ximian.com/show_bug.cgi?id=77559
CspParameters csp = new CspParameters ();
csp.Flags = CspProviderFlags.UseMachineKeyStore;
rsa = new RSACryptoServiceProvider (csp);
rsa.ImportParameters (rsap);
}
- return rsa;
+ catch {
+ // rethrow original, not the later, exception if this fails
+ throw ce;
+ }
+ }
+ return rsa;
+ }
+
+ static public DSA FromCapiPrivateKeyBlobDSA (byte[] blob)
+ {
+ return FromCapiPrivateKeyBlobDSA (blob, 0);
+ }
+
+ static public DSA FromCapiPrivateKeyBlobDSA (byte[] blob, int offset)
+ {
+ if (blob == null)
+ throw new ArgumentNullException ("blob");
+ if (offset >= blob.Length)
+ throw new ArgumentException ("blob is too small.");
+
+ DSAParameters dsap = new DSAParameters ();
+ try {
+ if ((blob [offset] != 0x07) || // PRIVATEKEYBLOB (0x07)
+ (blob [offset + 1] != 0x02) || // Version (0x02)
+ (blob [offset + 2] != 0x00) || // Reserved (word)
+ (blob [offset + 3] != 0x00) ||
+ (ToUInt32LE (blob, offset + 8) != 0x32535344)) // DWORD magic
+ throw new CryptographicException ("Invalid blob header");
+
+ int bitlen = ToInt32LE (blob, offset + 12);
+ int bytelen = bitlen >> 3;
+ int pos = offset + 16;
+
+ dsap.P = new byte [bytelen];
+ Buffer.BlockCopy (blob, pos, dsap.P, 0, bytelen);
+ Array.Reverse (dsap.P);
+ pos += bytelen;
+
+ dsap.Q = new byte [20];
+ Buffer.BlockCopy (blob, pos, dsap.Q, 0, 20);
+ Array.Reverse (dsap.Q);
+ pos += 20;
+
+ dsap.G = new byte [bytelen];
+ Buffer.BlockCopy (blob, pos, dsap.G, 0, bytelen);
+ Array.Reverse (dsap.G);
+ pos += bytelen;
+
+ dsap.X = new byte [20];
+ Buffer.BlockCopy (blob, pos, dsap.X, 0, 20);
+ Array.Reverse (dsap.X);
+ pos += 20;
+
+ dsap.Counter = ToInt32LE (blob, pos);
+ pos += 4;
+
+ dsap.Seed = new byte [20];
+ Buffer.BlockCopy (blob, pos, dsap.Seed, 0, 20);
+ Array.Reverse (dsap.Seed);
+ pos += 20;
}
catch (Exception e) {
throw new CryptographicException ("Invalid blob.", e);
}
+
+ DSA dsa = null;
+ try {
+ dsa = (DSA)DSA.Create ();
+ dsa.ImportParameters (dsap);
+ }
+ catch (CryptographicException ce) {
+ // this may cause problem when this code is run under
+ // the SYSTEM identity on Windows (e.g. ASP.NET). See
+ // http://bugzilla.ximian.com/show_bug.cgi?id=77559
+ try {
+ CspParameters csp = new CspParameters ();
+ csp.Flags = CspProviderFlags.UseMachineKeyStore;
+ dsa = new DSACryptoServiceProvider (csp);
+ dsa.ImportParameters (dsap);
+ }
+ catch {
+ // rethrow original, not the later, exception if this fails
+ throw ce;
+ }
+ }
+ return dsa;
}
static public byte[] ToCapiPrivateKeyBlob (RSA rsa)
return blob;
}
+ static public byte[] ToCapiPrivateKeyBlob (DSA dsa)
+ {
+ DSAParameters p = dsa.ExportParameters (true);
+ int keyLength = p.P.Length; // in bytes
+
+ // header + P + Q + G + X + count + seed
+ byte[] blob = new byte [16 + keyLength + 20 + keyLength + 20 + 4 + 20];
+
+ blob [0] = 0x07; // Type - PRIVATEKEYBLOB (0x07)
+ blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
+ // [2], [3] // RESERVED - Always 0
+ blob [5] = 0x22; // ALGID
+ blob [8] = 0x44; // Magic
+ blob [9] = 0x53;
+ blob [10] = 0x53;
+ blob [11] = 0x32;
+
+ byte[] bitlen = GetBytesLE (keyLength << 3);
+ blob [12] = bitlen [0];
+ blob [13] = bitlen [1];
+ blob [14] = bitlen [2];
+ blob [15] = bitlen [3];
+
+ int pos = 16;
+ byte[] part = p.P;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, keyLength);
+ pos += keyLength;
+
+ part = p.Q;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, 20);
+ pos += 20;
+
+ part = p.G;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, keyLength);
+ pos += keyLength;
+
+ part = p.X;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, 20);
+ pos += 20;
+
+ Buffer.BlockCopy (GetBytesLE (p.Counter), 0, blob, pos, 4);
+ pos += 4;
+
+ part = p.Seed;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, 20);
+
+ return blob;
+ }
+
static public RSA FromCapiPublicKeyBlob (byte[] blob)
{
return FromCapiPublicKeyBlob (blob, 0);
}
}
+ static public DSA FromCapiPublicKeyBlobDSA (byte[] blob)
+ {
+ return FromCapiPublicKeyBlobDSA (blob, 0);
+ }
+
+ static public DSA FromCapiPublicKeyBlobDSA (byte[] blob, int offset)
+ {
+ if (blob == null)
+ throw new ArgumentNullException ("blob");
+ if (offset >= blob.Length)
+ throw new ArgumentException ("blob is too small.");
+
+ try {
+ if ((blob [offset] != 0x06) || // PUBLICKEYBLOB (0x06)
+ (blob [offset + 1] != 0x02) || // Version (0x02)
+ (blob [offset + 2] != 0x00) || // Reserved (word)
+ (blob [offset + 3] != 0x00) ||
+ (ToUInt32LE (blob, offset + 8) != 0x31535344)) // DWORD magic
+ throw new CryptographicException ("Invalid blob header");
+
+ int bitlen = ToInt32LE (blob, offset + 12);
+ DSAParameters dsap = new DSAParameters ();
+ int bytelen = bitlen >> 3;
+ int pos = offset + 16;
+
+ dsap.P = new byte [bytelen];
+ Buffer.BlockCopy (blob, pos, dsap.P, 0, bytelen);
+ Array.Reverse (dsap.P);
+ pos += bytelen;
+
+ dsap.Q = new byte [20];
+ Buffer.BlockCopy (blob, pos, dsap.Q, 0, 20);
+ Array.Reverse (dsap.Q);
+ pos += 20;
+
+ dsap.G = new byte [bytelen];
+ Buffer.BlockCopy (blob, pos, dsap.G, 0, bytelen);
+ Array.Reverse (dsap.G);
+ pos += bytelen;
+
+ dsap.Y = new byte [bytelen];
+ Buffer.BlockCopy (blob, pos, dsap.Y, 0, bytelen);
+ Array.Reverse (dsap.Y);
+ pos += bytelen;
+
+ dsap.Counter = ToInt32LE (blob, pos);
+ pos += 4;
+
+ dsap.Seed = new byte [20];
+ Buffer.BlockCopy (blob, pos, dsap.Seed, 0, 20);
+ Array.Reverse (dsap.Seed);
+ pos += 20;
+
+ DSA dsa = (DSA)DSA.Create ();
+ dsa.ImportParameters (dsap);
+ return dsa;
+ }
+ catch (Exception e) {
+ throw new CryptographicException ("Invalid blob.", e);
+ }
+ }
+
static public byte[] ToCapiPublicKeyBlob (RSA rsa)
{
RSAParameters p = rsa.ExportParameters (false);
return blob;
}
+ static public byte[] ToCapiPublicKeyBlob (DSA dsa)
+ {
+ DSAParameters p = dsa.ExportParameters (false);
+ int keyLength = p.P.Length; // in bytes
+
+ // header + P + Q + G + Y + count + seed
+ byte[] blob = new byte [16 + keyLength + 20 + keyLength + keyLength + 4 + 20];
+
+ blob [0] = 0x06; // Type - PUBLICKEYBLOB (0x06)
+ blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
+ // [2], [3] // RESERVED - Always 0
+ blob [5] = 0x22; // ALGID
+ blob [8] = 0x44; // Magic
+ blob [9] = 0x53;
+ blob [10] = 0x53;
+ blob [11] = 0x31;
+
+ byte[] bitlen = GetBytesLE (keyLength << 3);
+ blob [12] = bitlen [0];
+ blob [13] = bitlen [1];
+ blob [14] = bitlen [2];
+ blob [15] = bitlen [3];
+
+ int pos = 16;
+ byte[] part;
+
+ part = p.P;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, keyLength);
+ pos += keyLength;
+
+ part = p.Q;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, 20);
+ pos += 20;
+
+ part = p.G;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, keyLength);
+ pos += keyLength;
+
+ part = p.Y;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, keyLength);
+ pos += keyLength;
+
+ Buffer.BlockCopy (GetBytesLE (p.Counter), 0, blob, pos, 4);
+ pos += 4;
+
+ part = p.Seed;
+ Array.Reverse (part);
+ Buffer.BlockCopy (part, 0, blob, pos, 20);
+
+ return blob;
+ }
+
// PRIVATEKEYBLOB
// PUBLICKEYBLOB
static public RSA FromCapiKeyBlob (byte[] blob)
throw new CryptographicException ("Unknown blob format.");
}
+ static public DSA FromCapiKeyBlobDSA (byte[] blob)
+ {
+ return FromCapiKeyBlobDSA (blob, 0);
+ }
+
+ static public DSA FromCapiKeyBlobDSA (byte[] blob, int offset)
+ {
+ if (blob == null)
+ throw new ArgumentNullException ("blob");
+ if (offset >= blob.Length)
+ throw new ArgumentException ("blob is too small.");
+
+ switch (blob [offset]) {
+ case 0x06:
+ return FromCapiPublicKeyBlobDSA (blob, offset);
+ case 0x07:
+ return FromCapiPrivateKeyBlobDSA (blob, offset);
+ }
+ throw new CryptographicException ("Unknown blob format.");
+ }
+
static public byte[] ToCapiKeyBlob (AsymmetricAlgorithm keypair, bool includePrivateKey)
{
if (keypair == null)
// check between RSA and DSA (and potentially others like DH)
if (keypair is RSA)
return ToCapiKeyBlob ((RSA)keypair, includePrivateKey);
+ else if (keypair is DSA)
+ return ToCapiKeyBlob ((DSA)keypair, includePrivateKey);
else
return null; // TODO
}
return ToCapiPublicKeyBlob (rsa);
}
+ static public byte[] ToCapiKeyBlob (DSA dsa, bool includePrivateKey)
+ {
+ if (dsa == null)
+ throw new ArgumentNullException ("dsa");
+
+ if (includePrivateKey)
+ return ToCapiPrivateKeyBlob (dsa);
+ else
+ return ToCapiPublicKeyBlob (dsa);
+ }
+
static public string ToHex (byte[] input)
{
if (input == null)
projects / mono.git / blobdiff