98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
|
#include "packet.h"
|
||
|
|
#include "key.h"
|
||
|
|
#include "util.h"
|
||
|
|
|
||
|
|
key_pair *create_key_pair(char *username)
|
||
|
|
{
|
||
|
|
uint8_t cl_pk_bin[PK_BIN_SIZE], cl_sk_bin[SK_BIN_SIZE];
|
||
|
|
crypto_sign_keypair(cl_pk_bin, cl_sk_bin);
|
||
|
|
char pk_path[PATH_MAX], sk_path[PATH_MAX];
|
||
|
|
|
||
|
|
/* USE DB INSTEAD OF FILES */
|
||
|
|
sprintf(pk_path, "/home/night/%s_pk", username);
|
||
|
|
sprintf(sk_path, "/home/night/%s_sk", username);
|
||
|
|
FILE *pkf = fopen(pk_path, "w+");
|
||
|
|
FILE *skf = fopen(sk_path, "w+");
|
||
|
|
|
||
|
|
uint8_t pk_content[PK_SIZE], sk_content[SK_SIZE], metadata[METADATA_SIZE];
|
||
|
|
time_t current_time = time(NULL);
|
||
|
|
|
||
|
|
uint8_t *username_padded = memalloc(MAX_NAME * sizeof(uint8_t));
|
||
|
|
strcpy(username_padded, username);
|
||
|
|
size_t length = strlen(username);
|
||
|
|
if (length < MAX_NAME) {
|
||
|
|
/* Pad with null characters up to max length */
|
||
|
|
memset(username_padded + length, 0, MAX_NAME - length);
|
||
|
|
}
|
||
|
|
memcpy(metadata, username_padded, MAX_NAME);
|
||
|
|
memcpy(metadata + MAX_NAME, ¤t_time, TIME_SIZE);
|
||
|
|
uint8_t *hash = memalloc(HASH_SIZE * sizeof(uint8_t));
|
||
|
|
uint8_t *sign = memalloc(SIGN_SIZE * sizeof(uint8_t));
|
||
|
|
crypto_generichash(hash, HASH_SIZE, metadata, METADATA_SIZE, NULL, 0);
|
||
|
|
crypto_sign_detached(sign, NULL, hash, HASH_SIZE, cl_sk_bin);
|
||
|
|
memcpy(pk_content, cl_pk_bin, PK_BIN_SIZE);
|
||
|
|
memcpy(pk_content + PK_BIN_SIZE, metadata, METADATA_SIZE);
|
||
|
|
memcpy(pk_content + PK_BIN_SIZE + METADATA_SIZE, sign, SIGN_SIZE);
|
||
|
|
memcpy(sk_content, cl_sk_bin, SK_BIN_SIZE);
|
||
|
|
memcpy(sk_content + SK_BIN_SIZE, metadata, METADATA_SIZE);
|
||
|
|
memcpy(sk_content + SK_BIN_SIZE + METADATA_SIZE, sign, SIGN_SIZE);
|
||
|
|
free(hash);
|
||
|
|
|
||
|
|
fwrite(pk_content, 1, PK_SIZE, pkf);
|
||
|
|
fwrite(sk_content, 1, SK_SIZE, skf);
|
||
|
|
|
||
|
|
fclose(pkf);
|
||
|
|
fclose(skf);
|
||
|
|
|
||
|
|
key_pair *kp = memalloc(sizeof(key_pair));
|
||
|
|
memcpy(kp->pk.bin, cl_pk_bin, PK_BIN_SIZE);
|
||
|
|
memcpy(kp->pk.username, username_padded, MAX_NAME);
|
||
|
|
kp->pk.creation = current_time;
|
||
|
|
memcpy(kp->pk.signature, sign, SIGN_SIZE);
|
||
|
|
|
||
|
|
memcpy(kp->sk.bin, cl_sk_bin, SK_BIN_SIZE);
|
||
|
|
memcpy(kp->sk.username, username_padded, MAX_NAME);
|
||
|
|
kp->sk.creation = current_time;
|
||
|
|
memcpy(kp->sk.signature, sign, SIGN_SIZE);
|
||
|
|
|
||
|
|
free(username_padded);
|
||
|
|
free(sign);
|
||
|
|
return kp;
|
||
|
|
}
|
||
|
|
|
||
|
|
key_pair *get_key_pair(char *username)
|
||
|
|
{
|
||
|
|
char pk_path[PATH_MAX], sk_path[PATH_MAX];
|
||
|
|
sprintf(pk_path, "/home/night/%s_pk", username);
|
||
|
|
sprintf(sk_path, "/home/night/%s_sk", username);
|
||
|
|
|
||
|
|
FILE *pkf = fopen(pk_path, "r");
|
||
|
|
FILE *skf = fopen(sk_path, "r");
|
||
|
|
|
||
|
|
if (!pkf || !skf) {
|
||
|
|
printf("Error opening key files.\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t pk_content[PK_SIZE], sk_content[SK_SIZE];
|
||
|
|
fread(pk_content, 1, PK_SIZE, pkf);
|
||
|
|
fread(sk_content, 1, SK_SIZE, skf);
|
||
|
|
|
||
|
|
fclose(pkf);
|
||
|
|
fclose(skf);
|
||
|
|
|
||
|
|
key_pair *kp = memalloc(sizeof(key_pair));
|
||
|
|
|
||
|
|
memcpy(kp->pk.bin, pk_content, PK_BIN_SIZE);
|
||
|
|
memcpy(kp->pk.username, pk_content + PK_BIN_SIZE, MAX_NAME);
|
||
|
|
memcpy(&kp->pk.creation, pk_content + PK_BIN_SIZE + MAX_NAME, TIME_SIZE);
|
||
|
|
memcpy(kp->pk.signature, pk_content + PK_BIN_SIZE + MAX_NAME + TIME_SIZE, SIGN_SIZE);
|
||
|
|
|
||
|
|
memcpy(kp->sk.bin, sk_content, SK_BIN_SIZE);
|
||
|
|
memcpy(kp->sk.username, sk_content + SK_BIN_SIZE, MAX_NAME);
|
||
|
|
memcpy(&kp->sk.creation, sk_content + SK_BIN_SIZE + MAX_NAME, TIME_SIZE);
|
||
|
|
memcpy(kp->sk.signature, sk_content + SK_BIN_SIZE + MAX_NAME + TIME_SIZE, SIGN_SIZE);
|
||
|
|
|
||
|
|
return kp;
|
||
|
|
}
|