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routing/kademlia, using sha256 instead of sha1.

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This commit is contained in:
Jose Marcial Vieira Bisneto 2017-02-16 19:10:50 -03:00
parent ccc7ca3e8b
commit 35a9b4b73e
1 changed files with 22 additions and 14 deletions
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36
routing/kademlia.c
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@ -13,7 +13,7 @@
#include <sys/socket.h> #include <sys/socket.h>
#include <netdb.h> #include <netdb.h>
#include <sys/signal.h> #include <sys/signal.h>
#include <libp2p/crypto/sha1.h> #include <libp2p/crypto/sha256.h>
#include <dht.h> #include <dht.h>
#define MAX_BOOTSTRAP_NODES 20 #define MAX_BOOTSTRAP_NODES 20
@ -51,26 +51,34 @@ int dht_blacklisted (const struct sockaddr *sa, int salen)
} }
/* We need to provide a reasonably strong cryptographic hashing function. /* We need to provide a reasonably strong cryptographic hashing function.
SHA-1 code adapted from https://github.com/mwarning/KadNode */ libp2p_crypto_hashing_sha256 */
void dht_hash (void *hash_return, int hash_size, void dht_hash (void *hash_return, int hash_size,
const void *v1, int len1, const void *v1, int len1,
const void *v2, int len2, const void *v2, int len2,
const void *v3, int len3) const void *v3, int len3)
{ {
SHA1_CTX ctx; int len = len1 + len2 + len3;
uint8_t digest[SHA1_DIGEST_SIZE]; char *in, out[32];
SHA1_Init (&ctx); if (!hash_return || hash_size==0 || len==0) {
if (v1) SHA1_Update (&ctx, v1, len1); return; // invalid param.
if (v2) SHA1_Update (&ctx, v2, len2); }
if (v3) SHA1_Update (&ctx, v3, len3);
SHA1_Final (&ctx, digest); in = malloc (len);
if (hash_size > SHA1_DIGEST_SIZE) { if (in) {
memset ((char*)hash_return + SHA1_DIGEST_SIZE, 0, hash_size - SHA1_DIGEST_SIZE); memcpy(in, v1, len1);
hash_size = SHA1_DIGEST_SIZE; memcpy(in+len1, v2, len2);
memcpy(in+len1+len2, v3, len3);
if ( libp2p_crypto_hashing_sha256 (in, len, out) ) {
if (hash_size > sizeof(out)) {
memset ((char*)hash_return + sizeof(out), 0, hash_size - sizeof(out));
hash_size = sizeof(out);
}
memcpy(hash_return, out, hash_size);
}
free (in);
} }
memcpy(hash_return, digest, hash_size);
} }
int dht_random_bytes (void *buf, size_t size) int dht_random_bytes (void *buf, size_t size)