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/*
* crypto_mode.c --- convert between encryption modes and strings
*
* Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu>
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include <errno.h>
#include "e2p.h"
struct mode {
unsigned int num;
const char *string;
};
static struct mode mode_list[] = {
{ EXT4_ENCRYPTION_MODE_INVALID, "Invalid"},
{ EXT4_ENCRYPTION_MODE_AES_256_XTS, "AES-256-XTS"},
{ EXT4_ENCRYPTION_MODE_AES_256_GCM, "AES-256-GCM"},
{ EXT4_ENCRYPTION_MODE_AES_256_CBC, "AES-256-CBC"},
{ 0, 0 },
};
const char *e2p_encmode2string(int num)
{
struct mode *p;
static char buf[20];
for (p = mode_list; p->string; p++) {
if (num == p->num)
return p->string;
}
sprintf(buf, "ENC_MODE_%d", num);
return buf;
}
/*
* Returns the hash algorithm, or -1 on error
*/
int e2p_string2encmode(char *string)
{
struct mode *p;
char *eptr;
int num;
for (p = mode_list; p->string; p++) {
if (!strcasecmp(string, p->string)) {
return p->num;
}
}
if (strncasecmp(string, "ENC_MODE_", 9))
return -1;
if (string[9] == 0)
return -1;
num = strtol(string+9, &eptr, 10);
if (num > 255 || num < 0)
return -1;
if (*eptr)
return -1;
return num;
}
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