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