/// <summary>
/// rips apart rawKey into public byte [] for RsaParameters class
/// </summary>
public Rsa(byte [] rawKey)
{
this.rawKey = rawKey; //596
pks = new PUBLICKEYSTRUC();
pks.bType = rawKey[0]; //7
pks.bVersion = rawKey[1]; //2
pks.reserved = BitConverter.ToUInt16(rawKey, 2); //0
pks.aiKeyAlg = BitConverter.ToUInt32(rawKey, 4); //41984
kb = (KeyBlob)pks.bType; //PRIVATE
c = (Calg)pks.aiKeyAlg; //RSA_KEYX
if (kb != KeyBlob.PUBLICKEYBLOB && kb != KeyBlob.PRIVATEKEYBLOB)
{
throw new Exception("unsupported blob type");
}
rpk = new RSAPUBKEY();
rpk.magic = BitConverter.ToUInt32(rawKey, 8); //843141970
rpk.bitlen = BitConverter.ToUInt32(rawKey, 12); //1024
rpk.pubexp = BitConverter.ToUInt32(rawKey, 16); //65537
uint byteLen = rpk.bitlen / 8; //128
this.SetSizeAndPosition(rpk.bitlen);
//public
Modulus = Format.GetBytes(this.rawKey, modulusPos, modulusLen, true);
Exponent = Format.GetBytes(this.rawKey, exponentPos, exponentLen, true);
//private
if (kb == KeyBlob.PRIVATEKEYBLOB)
{
this.P = Format.GetBytes(this.rawKey, prime1Pos, prime1Len, true);
this.Q = Format.GetBytes(this.rawKey, prime2Pos, prime2Len, true);
this.DP = Format.GetBytes(this.rawKey, exponent1Pos, exponent1Len, true);
this.DQ = Format.GetBytes(this.rawKey, exponent2Pos, exponent2Len, true);
this.InverseQ = Format.GetBytes(this.rawKey, coefficientPos, coefficientLen, true);
this.D = Format.GetBytes(this.rawKey, privateExponentPos, privateExponentLen, true);
}
else
{
this.P = null;
this.Q = null;
this.DP = null;
this.DQ = null;
this.InverseQ = null;
this.D = null;
}
}
/// <summary>
/// rips apart rawKey into public byte [] for RsaParameters class
/// </summary>
public Rsa(byte [] rawKey)
{
this.rawKey = rawKey; //596
pks = new PUBLICKEYSTRUC();
pks.bType = rawKey[0]; //7
pks.bVersion = rawKey[1]; //2
pks.reserved = BitConverter.ToUInt16(rawKey, 2); //0
pks.aiKeyAlg = BitConverter.ToUInt32(rawKey, 4); //41984
kb = (KeyBlob) pks.bType; //PRIVATE
c = (Calg) pks.aiKeyAlg; //RSA_KEYX
if(kb != KeyBlob.PUBLICKEYBLOB && kb != KeyBlob.PRIVATEKEYBLOB)
throw new Exception("unsupported blob type");
rpk = new RSAPUBKEY();
rpk.magic = BitConverter.ToUInt32(rawKey, 8); //843141970
rpk.bitlen = BitConverter.ToUInt32(rawKey, 12); //1024
rpk.pubexp = BitConverter.ToUInt32(rawKey, 16); //65537
uint byteLen = rpk.bitlen / 8; //128
this.SetSizeAndPosition(rpk.bitlen);
//public
Modulus = Format.GetBytes(this.rawKey, modulusPos, modulusLen, true);
Exponent = Format.GetBytes(this.rawKey, exponentPos, exponentLen, true);
//private
if(kb == KeyBlob.PRIVATEKEYBLOB)
{
this.P = Format.GetBytes(this.rawKey, prime1Pos, prime1Len, true);
this.Q = Format.GetBytes(this.rawKey, prime2Pos, prime2Len, true);
this.DP = Format.GetBytes(this.rawKey, exponent1Pos, exponent1Len, true);
this.DQ = Format.GetBytes(this.rawKey, exponent2Pos, exponent2Len, true);
this.InverseQ = Format.GetBytes(this.rawKey, coefficientPos, coefficientLen, true);
this.D = Format.GetBytes(this.rawKey, privateExponentPos, privateExponentLen, true);
}
else
{
this.P = null;
this.Q = null;
this.DP = null;
this.DQ = null;
this.InverseQ = null;
this.D = null;
}
}
public void BuildRawKey(bool privateKey)
{
//build up rawKey byte[]
uint rsaMagic = 0;
int caSize = 0;
uint bitLen = (uint)this.Modulus.Length * 8;
if (privateKey == true)
{
kb = KeyBlob.PRIVATEKEYBLOB;
caSize = 20 + (9 * ((int)bitLen / 16));
rsaMagic = 0x32415352; //ASCII encoding of "RSA2"
}
else //public
{
kb = KeyBlob.PUBLICKEYBLOB;
caSize = 20 + ((int)bitLen / 8);
rsaMagic = 0x31415352; //ASCII encoding of "RSA1"
}
rawKey = new byte[caSize];
//PUBLICKEYSTRUC
rawKey[0] = (byte)kb; //bType
rawKey[1] = (byte)2; //bVersion
//reserved 2,3
c = Calg.RSA_KEYX;
byte [] baKeyAlg = BitConverter.GetBytes((uint)c); //aiKeyAlg
Buffer.BlockCopy(baKeyAlg, 0, rawKey, 4, 4);
pks = new PUBLICKEYSTRUC();
pks.bType = rawKey[0];
pks.bVersion = rawKey[1];
pks.reserved = BitConverter.ToUInt16(rawKey, 2);
pks.aiKeyAlg = BitConverter.ToUInt32(rawKey, 4);
//RSAPUBKEY
byte [] baMagic = BitConverter.GetBytes(rsaMagic); //magic
Buffer.BlockCopy(baMagic, 0, rawKey, 8, 4);
byte [] baBitlen = BitConverter.GetBytes(bitLen); //bitlen
Buffer.BlockCopy(baBitlen, 0, rawKey, 12, 4);
this.SetSizeAndPosition(bitLen);
Format.SetBytes(this.rawKey, exponentPos, exponentLen, this.Exponent, true); //pubexp
rpk = new RSAPUBKEY();
rpk.magic = BitConverter.ToUInt32(rawKey, 8);
rpk.bitlen = BitConverter.ToUInt32(rawKey, 12);
rpk.pubexp = BitConverter.ToUInt32(rawKey, 16);
uint byteLen = rpk.bitlen / 8;
//public
Format.SetBytes(this.rawKey, modulusPos, modulusLen, this.Modulus, true);
Format.SetBytes(this.rawKey, exponentPos, exponentLen, this.Exponent, true);
//private
if (privateKey == true)
{
Format.SetBytes(this.rawKey, prime1Pos, prime1Len, this.P, true);
Format.SetBytes(this.rawKey, prime2Pos, prime2Len, this.Q, true);
Format.SetBytes(this.rawKey, exponent1Pos, exponent1Len, this.DP, true);
Format.SetBytes(this.rawKey, exponent2Pos, exponent2Len, this.DQ, true);
Format.SetBytes(this.rawKey, coefficientPos, coefficientLen, this.InverseQ, true);
Format.SetBytes(this.rawKey, privateExponentPos, privateExponentLen, this.D, true);
}
else
{
this.P = null;
this.Q = null;
this.DP = null;
this.DQ = null;
this.InverseQ = null;
this.D = null;
}
}
public void BuildRawKey(bool privateKey)
{
//build up rawKey byte[]
uint rsaMagic = 0;
int caSize = 0;
uint bitLen = (uint) this.Modulus.Length * 8;
if(privateKey == true)
{
kb = KeyBlob.PRIVATEKEYBLOB;
caSize = 20 + (9 * ((int)bitLen / 16));
rsaMagic = 0x32415352; //ASCII encoding of "RSA2"
}
else //public
{
kb = KeyBlob.PUBLICKEYBLOB;
caSize = 20 + ((int)bitLen / 8);
rsaMagic = 0x31415352; //ASCII encoding of "RSA1"
}
rawKey = new byte[caSize];
//PUBLICKEYSTRUC
rawKey[0] = (byte) kb; //bType
rawKey[1] = (byte) 2; //bVersion
//reserved 2,3
c = Calg.RSA_KEYX;
byte [] baKeyAlg = BitConverter.GetBytes((uint)c);//aiKeyAlg
Buffer.BlockCopy(baKeyAlg, 0, rawKey, 4, 4);
pks = new PUBLICKEYSTRUC();
pks.bType = rawKey[0];
pks.bVersion = rawKey[1];
pks.reserved = BitConverter.ToUInt16(rawKey, 2);
pks.aiKeyAlg = BitConverter.ToUInt32(rawKey, 4);
//RSAPUBKEY
byte [] baMagic = BitConverter.GetBytes(rsaMagic);//magic
Buffer.BlockCopy(baMagic, 0, rawKey, 8, 4);
byte [] baBitlen = BitConverter.GetBytes(bitLen);//bitlen
Buffer.BlockCopy(baBitlen, 0, rawKey, 12, 4);
this.SetSizeAndPosition(bitLen);
Format.SetBytes(this.rawKey, exponentPos, exponentLen, this.Exponent, true); //pubexp
rpk = new RSAPUBKEY();
rpk.magic = BitConverter.ToUInt32(rawKey, 8);
rpk.bitlen = BitConverter.ToUInt32(rawKey, 12);
rpk.pubexp = BitConverter.ToUInt32(rawKey, 16);
uint byteLen = rpk.bitlen / 8;
//public
Format.SetBytes(this.rawKey, modulusPos, modulusLen, this.Modulus, true);
Format.SetBytes(this.rawKey, exponentPos, exponentLen, this.Exponent, true);
//private
if(privateKey == true)
{
Format.SetBytes(this.rawKey, prime1Pos, prime1Len, this.P, true);
Format.SetBytes(this.rawKey, prime2Pos, prime2Len, this.Q, true);
Format.SetBytes(this.rawKey, exponent1Pos, exponent1Len, this.DP, true);
Format.SetBytes(this.rawKey, exponent2Pos, exponent2Len, this.DQ, true);
Format.SetBytes(this.rawKey, coefficientPos, coefficientLen, this.InverseQ, true);
Format.SetBytes(this.rawKey, privateExponentPos, privateExponentLen, this.D, true);
}
else
{
this.P = null;
this.Q = null;
this.DP = null;
this.DQ = null;
this.InverseQ = null;
this.D = null;
}
}
