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/*
* Copyright (c) 2005 - 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "hx_locl.h"
/**
* @page page_lock Locking and unlocking certificates and encrypted data.
*
* See the library functions here: @ref hx509_lock
*/
struct hx509_lock_data {
struct _hx509_password password;
hx509_certs certs;
hx509_prompter_fct prompt;
void *prompt_data;
};
static struct hx509_lock_data empty_lock_data = {
{ 0, NULL },
NULL,
NULL,
NULL
};
hx509_lock _hx509_empty_lock = &empty_lock_data;
/*
*
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_init(hx509_context context, hx509_lock *lock)
{
hx509_lock l;
int ret;
*lock = NULL;
l = calloc(1, sizeof(*l));
if (l == NULL)
return ENOMEM;
ret = hx509_certs_init(context,
"MEMORY:locks-internal",
0,
NULL,
&l->certs);
if (ret) {
free(l);
return ret;
}
*lock = l;
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_add_password(hx509_lock lock, const char *password)
{
void *d;
char *s;
s = strdup(password);
if (s == NULL)
return ENOMEM;
d = realloc(lock->password.val,
(lock->password.len + 1) * sizeof(lock->password.val[0]));
if (d == NULL) {
free(s);
return ENOMEM;
}
lock->password.val = d;
lock->password.val[lock->password.len] = s;
lock->password.len++;
return 0;
}
HX509_LIB_FUNCTION const struct _hx509_password * HX509_LIB_CALL
_hx509_lock_get_passwords(hx509_lock lock)
{
return &lock->password;
}
HX509_LIB_FUNCTION hx509_certs HX509_LIB_CALL
_hx509_lock_unlock_certs(hx509_lock lock)
{
return lock->certs;
}
HX509_LIB_FUNCTION void HX509_LIB_CALL
hx509_lock_reset_passwords(hx509_lock lock)
{
size_t i;
for (i = 0; i < lock->password.len; i++)
free(lock->password.val[i]);
free(lock->password.val);
lock->password.val = NULL;
lock->password.len = 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_add_cert(hx509_context context, hx509_lock lock, hx509_cert cert)
{
return hx509_certs_add(context, lock->certs, cert);
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_add_certs(hx509_context context, hx509_lock lock, hx509_certs certs)
{
return hx509_certs_merge(context, lock->certs, certs);
}
HX509_LIB_FUNCTION void HX509_LIB_CALL
hx509_lock_reset_certs(hx509_context context, hx509_lock lock)
{
hx509_certs certs = lock->certs;
int ret;
ret = hx509_certs_init(context,
"MEMORY:locks-internal",
0,
NULL,
&lock->certs);
if (ret == 0)
hx509_certs_free(&certs);
else
lock->certs = certs;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_lock_find_cert(hx509_lock lock, const hx509_query *q, hx509_cert *c)
{
*c = NULL;
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_set_prompter(hx509_lock lock, hx509_prompter_fct prompt, void *data)
{
lock->prompt = prompt;
lock->prompt_data = data;
return 0;
}
HX509_LIB_FUNCTION void HX509_LIB_CALL
hx509_lock_reset_promper(hx509_lock lock)
{
lock->prompt = NULL;
lock->prompt_data = NULL;
}
static int
default_prompter(void *data, const hx509_prompt *prompter)
{
if (hx509_prompt_hidden(prompter->type)) {
if(UI_UTIL_read_pw_string(prompter->reply.data,
prompter->reply.length,
prompter->prompt,
0))
return 1;
} else {
char *s = prompter->reply.data;
fputs (prompter->prompt, stdout);
fflush (stdout);
if(fgets(prompter->reply.data,
prompter->reply.length,
stdin) == NULL)
return 1;
s[strcspn(s, "\n")] = '\0';
}
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_prompt(hx509_lock lock, hx509_prompt *prompt)
{
if (lock->prompt == NULL)
return HX509_CRYPTO_NO_PROMPTER;
return (*lock->prompt)(lock->prompt_data, prompt);
}
HX509_LIB_FUNCTION void HX509_LIB_CALL
hx509_lock_free(hx509_lock lock)
{
if (lock) {
hx509_certs_free(&lock->certs);
hx509_lock_reset_passwords(lock);
memset(lock, 0, sizeof(*lock));
free(lock);
}
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_prompt_hidden(hx509_prompt_type type)
{
/* default to hidden if unknown */
switch (type) {
case HX509_PROMPT_TYPE_QUESTION:
case HX509_PROMPT_TYPE_INFO:
return 0;
default:
return 1;
}
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_lock_command_string(hx509_lock lock, const char *string)
{
if (strncasecmp(string, "PASS:", 5) == 0) {
hx509_lock_add_password(lock, string + 5);
} else if (strcasecmp(string, "PROMPT") == 0) {
hx509_lock_set_prompter(lock, default_prompter, NULL);
} else
return HX509_UNKNOWN_LOCK_COMMAND;
return 0;
}
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