/* This function is the "key store" for tinyDTLS. It is called to
* retrieve a key for the given identity within this particular
* session. */
static int
get_psk_info(struct dtls_context_t *ctx,
const session_t *session,
dtls_credentials_type_t type,
const unsigned char *id, size_t id_len,
unsigned char *result, size_t result_length) {
printf("getpskinfo\n");
switch (type) {
case DTLS_PSK_IDENTITY:
if (result_length < psk_id_length) {
printf("cannot set psk_identity -- buffer too small\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, psk_id, psk_id_length);
return psk_id_length;
case DTLS_PSK_KEY:
if (id_len != psk_id_length || memcmp(psk_id, id, id_len) != 0) {
printf("PSK for unknown id requested, exiting\n");
return dtls_alert_fatal_create(DTLS_ALERT_ILLEGAL_PARAMETER);
} else if (result_length < psk_key_length) {
printf("cannot set psk -- buffer too small\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, psk_key, psk_key_length);
return psk_key_length;
default:
printf("unsupported request type: %d\n", type);
}
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
/* This function is the "key store" for tinyDTLS. It is called to
* retrieve a key for the given identity within this particular
* session. */
static int
get_psk_info(struct dtls_context_t *ctx, const session_t *session,
dtls_credentials_type_t type,
const unsigned char *id, size_t id_len,
unsigned char *result, size_t result_length) {
struct keymap_t {
unsigned char *id;
size_t id_length;
unsigned char *key;
size_t key_length;
} psk[3] = {
{ (unsigned char *)"Client_identity", 15,
(unsigned char *)"secretPSK", 9 },
{ (unsigned char *)"default identity", 16,
(unsigned char *)"\x11\x22\x33", 3 },
{ (unsigned char *)"\0", 2,
(unsigned char *)"", 1 }
};
switch (type) {
case DTLS_PSK_HINT:
if (result_length < strlen(PSK_SERVER_HINT)) {
dtls_warn("cannot set psk_hint -- buffer too small\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, PSK_SERVER_HINT, strlen(PSK_SERVER_HINT));
return strlen(PSK_SERVER_HINT);
case DTLS_PSK_KEY:
if (id) {
int i;
for (i = 0; i < sizeof(psk)/sizeof(struct keymap_t); i++) {
if (id_len == psk[i].id_length && memcmp(id, psk[i].id, id_len) == 0) {
if (result_length < psk[i].key_length) {
dtls_warn("buffer too small for PSK");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, psk[i].key, psk[i].key_length);
return psk[i].key_length;
}
}
}
break;
default:
dtls_warn("unsupported request type: %d\n", type);
}
return dtls_alert_fatal_create(DTLS_ALERT_DECRYPT_ERROR);
}
/* This function is the "key store" for tinyDTLS. It is called to
* retrieve a key for the given identity within this particular
* session. */
static int get_psk_info(struct dtls_context_t *ctx,
const session_t *session,
dtls_credentials_type_t type,
const unsigned char *id, size_t id_len,
unsigned char *result, size_t result_length) {
// find connection
dtls_connection_t* cnx = connection_find((dtls_connection_t *) ctx->app, &(session->addr.st),session->size);
if (cnx == NULL)
{
printf("GET PSK session not found\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
switch (type) {
case DTLS_PSK_IDENTITY:
{
int idLen;
char * id;
id = security_get_public_id(cnx->securityObj, cnx->securityInstId, &idLen);
if (result_length < idLen)
{
printf("cannot set psk_identity -- buffer too small\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, id,idLen);
lwm2m_free(id);
return idLen;
}
case DTLS_PSK_KEY:
{
int keyLen;
char * key;
key = security_get_secret_key(cnx->securityObj, cnx->securityInstId, &keyLen);
if (result_length < keyLen)
{
printf("cannot set psk -- buffer too small\n");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, key,keyLen);
lwm2m_free(key);
return keyLen;
}
default:
printf("unsupported request type: %d\n", type);
}
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
/* This function is the "key store" for tinyDTLS. It is called to
* retrieve a key for the given identity within this particular
* session. */
static int
get_psk_info(struct dtls_context_t *ctx, const session_t *session,
dtls_credentials_type_t type,
const unsigned char *id, size_t id_len,
unsigned char *result, size_t result_length) {
struct keymap_t {
unsigned char *id;
size_t id_length;
unsigned char *key;
size_t key_length;
} psk[3] = {
{ (unsigned char *)"Client_identity", 15,
(unsigned char *)"secretPSK", 9 },
{ (unsigned char *)"default identity", 16,
(unsigned char *)"\x11\x22\x33", 3 },
{ (unsigned char *)"\0", 2,
(unsigned char *)"", 1 }
};
if (type != DTLS_PSK_KEY) {
return 0;
}
if (id) {
int i;
for (i = 0; i < sizeof(psk)/sizeof(struct keymap_t); i++) {
if (id_len == psk[i].id_length && memcmp(id, psk[i].id, id_len) == 0) {
if (result_length < psk[i].key_length) {
dtls_warn("buffer too small for PSK");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, psk[i].key, psk[i].key_length);
return psk[i].key_length;
}
}
}
return dtls_alert_fatal_create(DTLS_ALERT_DECRYPT_ERROR);
}
/* This function is the "key store" for tinyDTLS. It is called to
* retrieve a key for the given identiy within this particular
* session. */
static int
get_psk_info(struct dtls_context_t *ctx, const session_t *session,
dtls_credentials_type_t type,
const unsigned char *id, size_t id_len,
unsigned char *result, size_t result_length) {
struct keymap_t {
unsigned char *id;
size_t id_length;
unsigned char *key;
size_t key_length;
} psk[1] = {
{ (unsigned char *)DTLS_IDENTITY_HINT, DTLS_IDENTITY_HINT_LENGTH, (unsigned char *)DTLS_PSK_KEY_VALUE, DTLS_PSK_KEY_VALUE_LENGTH },
};
if (type != DTLS_PSK_KEY) {
return 0;
}
if (id) {
int i;
for (i = 0; i < sizeof(psk)/sizeof(struct keymap_t); i++) {
if (id_len == psk[i].id_length && memcmp(id, psk[i].id, id_len) == 0) {
if (result_length < psk[i].key_length) {
dtls_warn("buffer too small for PSK");
return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
}
memcpy(result, psk[i].key, psk[i].key_length);
return psk[i].key_length;
}
}
}
return dtls_alert_fatal_create(DTLS_ALERT_DECRYPT_ERROR);
}
