I need a coder right away to develop an asymmetric encryption algorithm using the rijndael encryption algorithm built into the .NET Framework 2.0. It needs to generate public and private key pairs without using X509 certificates. I need these methods:
EncryptFile
EncryptStream
EncryptString
DecryptFile
DecryptStream
DecryptString
Assume you do not have read/write access to the certificate store. This is in a tight security hosted environment.
## Deliverables
1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.
2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):
a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.
b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.
3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).
* * *This broadcast message was sent to all bidders on Wednesday Nov 15, 2006 7:29:11 AM:
Below are answers to all your questions:
Q: For each of the six functions you want implemented, what is the proper signature? I need to know the types of the parameters you wish to place on each function. Can you provide this?
A: See the interfaces to implement below.
Q: Pls clarify one feature of the algorithm - my understanding of asymmetric encryption algorithm based on Rijndael is that it is possible to implement it only with support of additional public key algorithm (asymmetric one) used to transmit encrypted key for symmetric Rijndael algorithm, This type of architecture is used by PGP.
A: That is correct.
Q: AES is simmetric alghoritm. where you can find private/public keys, i don't know.
A: You will have to create an asymetric encryption algorithm based on Rijndael.
Q: Will you be passing in a salt or something which i should use to generate the key pair?
A: Yes, please see the interfaces below.
interface ICustomCert
{
void ICustomCert(string initializationVector, string salt);
string PublicKey
{
get;
set;
}
string PrivateKey
{
get;
set;
}
}
interface IPublicKeyEncryption
{
bool Encrypt(string inputFile, string outputFile, ICustomCert cert);
string Encrypt(string inputString, ICustomCert cert);
[login to view URL] Encrypt([login to view URL] memStream, ICustomCert cert);
bool Decrypt(string inputFile, string outputFile, ICustomCert cert);
string Decrypt(string inputString, ICustomCert cert);
[login to view URL] Decrypt([login to view URL] memStream, ICustomCert cert);
}
## Platform
C#, .NET Framework 2.0