c-ipfs/datastore/ds_helper.c

57 lines
2.1 KiB
C
Raw Normal View History

/**
* Some code to help with the datastore / blockstore interface
* NOTE: the datastore stores things under a multihash key
*/
#include "libp2p/crypto/encoding/base32.h"
#include "ipfs/datastore/ds_helper.h"
/**
* Generate a base32 key based on the passed in binary_array (which is normally a multihash)
* @param binary_array what to base the key on
* @param array_length the size of the binary array
* @param results where the key will be put
* @param max_results_length the size of the results buffer
* @param results_length the length of the generated key
* @returns true(1) on success
*/
int ipfs_datastore_helper_ds_key_from_binary(const unsigned char* binary_array, size_t array_length,
unsigned char* results, size_t max_results_length, size_t* results_length) {
size_t encoded_length = libp2p_crypto_encoding_base32_encode_size(array_length);
if (encoded_length > max_results_length)
return 0;
*results_length = max_results_length;
int retVal = libp2p_crypto_encoding_base32_encode(binary_array, array_length, results, results_length);
if (retVal == 0) {
*results_length = 0;
return 0;
}
return 1;
}
/**
* Generate a binary array (normally a multihash) based on the passed in datastore key
* @param ds_key the base32 encoded key
* @param key_length the length of the base32 "string"
* @param binary_array where to put the decoded value
* @param max_binary_array_length the memory size of binary_array
* @param completed_binary_array_length the length of what was written to the binary_array
* @returns true(1) on success
*/
int ipfs_datastore_helper_binary_from_ds_key(const unsigned char* ds_key, size_t key_length, unsigned char* binary_array,
size_t max_binary_array_length, size_t* completed_binary_array_length) {
size_t decoded_length = libp2p_crypto_encoding_base32_decode_size(key_length);
if (decoded_length > max_binary_array_length)
return 0;
*completed_binary_array_length = max_binary_array_length;
int retVal = libp2p_crypto_encoding_base32_decode(ds_key, key_length, binary_array, completed_binary_array_length);
if (retVal == 0) {
*completed_binary_array_length = 0;
return 0;
}
return 1;
}