int olsrd_mdp_sign(co_obj_t *self, co_obj_t **output, co_obj_t *params) {
int msg_len = 0, ret = 0, sig_buf_len;
unsigned char *msg = NULL, *sig_buf = NULL;
/** skipping some error checking for performance reasons */
// CHECK(IS_LIST(params) && co_list_length(params) == 2,"Invalid params");
msg_len = co_obj_data((char**)&msg,co_list_element(params,1));
sig_buf_len = SIGNATURE_BYTES + msg_len + 1;
sig_buf = calloc(sig_buf_len,sizeof(unsigned char));
CHECK(serval_create_signature((unsigned char*)_LIST_ELEMENT(params,0),
msg,
msg_len,
sig_buf,
sig_buf_len),"Failed to sign OLSRd packet");
CMD_OUTPUT("sig",co_bin8_create((char*)(sig_buf+msg_len),SIGNATURE_BYTES,0));
ret = 1;
error:
if (sig_buf) free(sig_buf);
return ret;
}
int cmd_serval_sign(const char *sid_str,
const size_t sid_len,
const unsigned char *msg,
const size_t msg_len,
char *sig_str_buf,
const size_t sig_str_size,
const char *keyring_path,
const size_t keyring_len) {
int ret = 0;
unsigned char signed_msg[msg_len + SIGNATURE_BYTES];
keyring_file *_keyring = NULL;
unsigned char *key = NULL;
unsigned char packedSid[SID_SIZE] = {0};
CHECK(sig_str_size >= 2*SIGNATURE_BYTES + 1,"Signature buffer too small");
if (sid_str) {
CHECK_ERR(sid_len == 2*SID_SIZE && str_is_subscriber_id(sid_str) == 1,"Invalid SID");
stowSid(packedSid,0,sid_str);
}
if (keyring_path) {
CHECK_ERR(serval_init_keyring(sid_str ? packedSid : NULL,
sid_str ? SID_SIZE : 0,
keyring_path,
keyring_len,
&_keyring,
&key,
NULL), "Failed to initialize Serval keyring");
} else {
CHECK_ERR(serval_extract_sas(&key,NULL,keyring,packedSid),"Failed to fetch SAS key");
}
CHECK_ERR(serval_create_signature(key, msg, msg_len, signed_msg, SIGNATURE_BYTES + msg_len),"Failed to create signature");
strncpy(sig_str_buf,alloca_tohex(signed_msg + msg_len,SIGNATURE_BYTES),2*SIGNATURE_BYTES);
sig_str_buf[2*SIGNATURE_BYTES] = '\0';
ret = 1;
error:
if (_keyring) keyring_free(_keyring);
return ret;
}
int
olsrd_mdp_sign(co_obj_t *self, co_obj_t **output, co_obj_t *params)
{
int ret = 0;
svl_crypto_ctx *ctx = svl_crypto_ctx_new();
/** skipping some error checking for performance reasons */
// CHECK(IS_LIST(params) && co_list_length(params) == 2, "Invalid params");
ctx->msg_len = co_obj_data((char**)&ctx->msg, co_list_element(params, 1));
memcpy(ctx->sas_private,_LIST_ELEMENT(params, 0),crypto_sign_SECRETKEYBYTES);
CHECK(serval_create_signature(ctx), "Failed to sign OLSRd packet");
CMD_OUTPUT("sig", co_bin8_create((char*)ctx->signature, SIGNATURE_BYTES, 0));
ret = 1;
error:
svl_crypto_ctx_free(ctx);
return ret;
}
int
cmd_serval_sign(svl_crypto_ctx *ctx)
{
CHECK_ERR(ctx,"Invalid ctx");
/* If a non-default keyring path is given, and/or no SID is set,
* we need to initialize the keyring */
if (ctx->keyring_path || !ctx->sid[0]) {
CHECK_ERR(serval_init_keyring(ctx),
"Failed to initialize Serval keyring");
} else {
// or just use the default keyring
ctx->keyring_file = keyring; // serval global
CHECK_ERR(serval_extract_sas(ctx),
"Failed to fetch SAS keys");
}
CHECK_ERR(serval_create_signature(ctx),"Failed to create signature");
return 1;
error:
return 0;
}