static char *tpm_engine_get_auth(UI_METHOD *ui_method, char *auth, int maxlen,
char *input_string, void *cb_data)
{
UI *ui;
DBG("%s", __FUNCTION__);
ui = UI_new();
if (ui_method)
UI_set_method(ui, ui_method);
UI_add_user_data(ui, cb_data);
if (!UI_add_input_string(ui, input_string, 0, auth, 0, maxlen)) {
TSSerr(TPM_F_TPM_ENGINE_GET_AUTH, TPM_R_UI_METHOD_FAILED);
UI_free(ui);
return NULL;
}
if (UI_process(ui)) {
TSSerr(TPM_F_TPM_ENGINE_GET_AUTH, TPM_R_UI_METHOD_FAILED);
UI_free(ui);
return NULL;
}
UI_free(ui);
return auth;
}
/* Get the PIN via asking user interface. The supplied call-back data are
* passed to the user interface implemented by an application. Only the
* application knows how to interpret the call-back data.
* A (strdup'ed) copy of the PIN code will be stored in the pin variable. */
static int get_pin(ENGINE_CTX *ctx, UI_METHOD *ui_method, void *callback_data)
{
UI *ui;
/* call ui to ask for a pin */
ui = UI_new();
if (ui == NULL) {
fprintf(stderr, "UI_new failed\n");
return 0;
}
if (ui_method != NULL)
UI_set_method(ui, ui_method);
if (callback_data != NULL)
UI_add_user_data(ui, callback_data);
destroy_pin(ctx);
ctx->pin = OPENSSL_malloc(MAX_PIN_LENGTH * sizeof(char));
if (ctx->pin == NULL)
return 0;
memset(ctx->pin, 0, MAX_PIN_LENGTH * sizeof(char));
ctx->pin_length = MAX_PIN_LENGTH;
if (!UI_add_input_string(ui, "PKCS#11 token PIN: ",
UI_INPUT_FLAG_DEFAULT_PWD, ctx->pin, 1, MAX_PIN_LENGTH)) {
fprintf(stderr, "UI_add_input_string failed\n");
UI_free(ui);
return 0;
}
if (UI_process(ui)) {
fprintf(stderr, "UI_process failed\n");
UI_free(ui);
return 0;
}
UI_free(ui);
return 1;
}
static char *file_get_pass(const UI_METHOD *ui_method, char *pass,
size_t maxsize, const char *prompt_info, void *data)
{
UI *ui = UI_new();
char *prompt = NULL;
if (ui == NULL) {
OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (ui_method != NULL)
UI_set_method(ui, ui_method);
UI_add_user_data(ui, data);
if ((prompt = UI_construct_prompt(ui, "pass phrase",
prompt_info)) == NULL) {
OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
pass = NULL;
} else if (!UI_add_input_string(ui, prompt, UI_INPUT_FLAG_DEFAULT_PWD,
pass, 0, maxsize - 1)) {
OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_UI_LIB);
pass = NULL;
} else {
switch (UI_process(ui)) {
case -2:
OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS,
OSSL_STORE_R_UI_PROCESS_INTERRUPTED_OR_CANCELLED);
pass = NULL;
break;
case -1:
OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_UI_LIB);
pass = NULL;
break;
default:
break;
}
}
OPENSSL_free(prompt);
UI_free(ui);
return pass;
}