79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
#ifndef rsa_h
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#define rsa_h
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#include <stddef.h>
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struct RsaPublicKey {
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char* der;
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size_t der_length;
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};
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struct RsaPrivateKey {
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// the basics of a key pair
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unsigned long long QP;
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unsigned long long DQ;
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unsigned long long DP;
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unsigned long long Q;
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unsigned long long P;
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unsigned long long D;
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unsigned long long E;
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unsigned long long N;
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// the keys in DER format
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// private
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char* der;
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size_t der_length;
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// public
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char* public_key_der;
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size_t public_key_length;
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};
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/**
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* Convert a struct RsaPrivateKey to a struct PrivateKey
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* @param in the RsaPrivateKey
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* @returns a struct PrivateKey
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*/
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struct PrivateKey* libp2p_crypto_rsa_to_private_key(struct RsaPrivateKey* in);
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/***
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* Convert a PrivateKey struct to an RsaPrivateKey struct
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* @param in the PrivateKey (NOTE: Must be of type KEYTYPE_RSA
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* @returns the RsaPrivateKey or NULL on error
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*/
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struct RsaPrivateKey* libp2p_crypto_private_key_to_rsa(struct PrivateKey* in);
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/**
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* generate a new private key
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* @param private_key the new private key
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* @param num_bits_for_keypair the size of the key (1024 minimum)
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* @returns true(1) on success
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*/
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int libp2p_crypto_rsa_generate_keypair(struct RsaPrivateKey* private_key, unsigned long num_bits_for_keypair);
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/**
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* Use the private key DER to fill in the public key DER
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* @param private_key the private key to use
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* @reutrns true(1) on success
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*/
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int libp2p_crypto_rsa_private_key_fill_public_key(struct RsaPrivateKey* private_key);
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/***
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* Free resources used by RsaPrivateKey
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* @param private_key the resources
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* @returns 0
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*/
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int libp2p_crypto_rsa_rsa_private_key_free(struct RsaPrivateKey* private_key);
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struct RsaPrivateKey* libp2p_crypto_rsa_rsa_private_key_new();
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/**
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* sign a message
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* @param private_key the private key
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* @param message the message to be signed
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* @param message_length the length of message
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* @param result the resultant signature. Note: should be pre-allocated and be the size of the private key (i.e. 2048)
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* @returns true(1) on successs, otherwise false(0)
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*/
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int libp2p_crypto_rsa_sign(struct RsaPrivateKey* private_key, const char* message, size_t message_length, unsigned char** result, size_t* result_size);
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int libp2p_crypto_rsa_verify(struct RsaPublicKey* public_key, const unsigned char* message, size_t message_length, const unsigned char* signature);
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#endif /* rsa_h */
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