126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/**
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* an "Identity"
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ipfs/repo/config/identity.h"
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#include "libp2p/crypto/rsa.h"
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#include "libp2p/crypto/peerutils.h"
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#include "libp2p/crypto/encoding/base64.h"
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#include "libp2p/crypto/encoding/x509.h"
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#include "libp2p/crypto/key.h"
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/**
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* Builds the Peer ID using the private key, and places it in the identity->peer_id
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* @param identity Where to get the DER of the private key
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* @returns true(1) on success
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*/
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int repo_config_identity_build_peer_id(struct Identity* identity) {
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struct PublicKey public_key;
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public_key.data = (unsigned char*)identity->private_key.public_key_der;
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public_key.data_size = identity->private_key.public_key_length;
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public_key.type = KEYTYPE_RSA;
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if (identity->peer == NULL)
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identity->peer = libp2p_peer_new();
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if (identity->peer->id != NULL) {
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free(identity->peer->id);
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identity->peer->id = NULL;
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}
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if (!libp2p_crypto_public_key_to_peer_id(&public_key, &identity->peer->id))
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return 0;
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identity->peer->id_size = strlen(identity->peer->id);
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return 1;
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}
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/***
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* public methods
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*/
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/***
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* Initializes a new Identity. NOTE: This builds a new private/public key pair
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* @param identity the identity to fill
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* @param num_bits_for_keypair the number of bits for the keypair
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* @returns true(1) on success, false(0) otherwise
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*/
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int repo_config_identity_init(struct Identity* identity, unsigned long num_bits_for_keypair) {
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if (num_bits_for_keypair < 1024)
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return 0;
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// generate the private key (& public)
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if (!libp2p_crypto_rsa_generate_keypair( &(identity->private_key), num_bits_for_keypair))
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return 0;
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if (!repo_config_identity_build_peer_id(identity)) {
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libp2p_crypto_rsa_rsa_private_key_free(&(identity->private_key));
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return 0;
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}
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return 1;
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}
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int repo_config_identity_new(struct Identity** identity) {
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*identity = (struct Identity*)malloc(sizeof(struct Identity));
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if (*identity == NULL)
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return 0;
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memset(*identity, 0, sizeof(struct Identity));
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(*identity)->peer = NULL;
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(*identity)->private_key.public_key_der = NULL;
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(*identity)->private_key.der = NULL;
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return 1;
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}
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int repo_config_identity_free(struct Identity* identity) {
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if (identity != NULL) {
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if (identity->private_key.public_key_der != NULL)
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free(identity->private_key.public_key_der);
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if (identity->private_key.der != NULL)
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free(identity->private_key.der);
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if (identity->peer != NULL)
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libp2p_peer_free(identity->peer);
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free(identity);
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}
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return 1;
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}
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/***
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* Build a RsaPrivateKey struct from a base64 string of the private key
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* @param identity where to put the new struct
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* @param base64 the null terminated base 64 encoded private key in DER format
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* @returns true(1) on success
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*/
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int repo_config_identity_build_private_key(struct Identity* identity, const char* base64) {
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size_t decoded_size = libp2p_crypto_encoding_base64_decode_size(strlen(base64));
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unsigned char decoded[decoded_size];
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int retVal = libp2p_crypto_encoding_base64_decode((unsigned char*)base64, strlen(base64), decoded, decoded_size, &decoded_size);
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if (retVal == 0)
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return 0;
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// now we have a protobuf'd struct PrivateKey. Unprotobuf it
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struct PrivateKey* priv_key;
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if (!libp2p_crypto_private_key_protobuf_decode(decoded, decoded_size, &priv_key))
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return 0;
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// now convert DER to RsaPrivateKey
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retVal = libp2p_crypto_encoding_x509_der_to_private_key(priv_key->data, priv_key->data_size, &identity->private_key);
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libp2p_crypto_private_key_free(priv_key);
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if (retVal == 0)
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return 0;
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// now build the private key DER
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retVal = libp2p_crypto_rsa_private_key_fill_public_key(&identity->private_key);
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if (retVal == 0)
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return 0;
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// now build PeerID
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retVal = repo_config_identity_build_peer_id(identity);
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return retVal;
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}
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