 08 Oct, 2012 3 commits


David Howells authored
Provide signature verification using an asymmetrictype key to indicate the public key to be used. The API is a single function that can be found in crypto/public_key.h: int verify_signature(const struct key *key, const struct public_key_signature *sig) The first argument is the appropriate key to be used and the second argument is the parsed signature data: struct public_key_signature { u8 *digest; u16 digest_size; enum pkey_hash_algo pkey_hash_algo : 8; union { MPI mpi[2]; struct { MPI s; /* m^d mod n */ } rsa; struct { MPI r; MPI s; } dsa; }; }; This should be filled in prior to calling the function. The hash algorithm should already have been called and the hash finalised and the output should be in a buffer pointed to by the 'digest' member. Any extra data to be added to the hash by the hash format (eg. PGP) should have been added by the caller prior to finalising the hash. It is assumed that the signature is made up of a number of MPI values. If an algorithm becomes available for which this is not the case, the above structure will have to change. It is also assumed that it will have been checked that the signature algorithm matches the key algorithm. Signedoffby: David Howells <[email protected]> Signedoffby: Rusty Russell <[email protected]>

David Howells authored
Add a subtype for supporting asymmetric publickey encryption algorithms such as DSA (FIPS186) and RSA (PKCS#1 / RFC1337). Signedoffby: David Howells <[email protected]> Signedoffby: Rusty Russell <[email protected]>

David Howells authored
Create a key type that can be used to represent an asymmetric key type for use in appropriate cryptographic operations, such as encryption, decryption, signature generation and signature verification. The key type is "asymmetric" and can provide access to a variety of cryptographic algorithms. Possibly, this would be better as "public_key"  but that has the disadvantage that "public key" is an overloaded term. Signedoffby: David Howells <[email protected]> Signedoffby: Rusty Russell <[email protected]>
