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/*
* Argon2 PBKDF2 library wrapper
*
* Copyright (C) 2016-2019 Red Hat, Inc. All rights reserved.
* Copyright (C) 2016-2019 Milan Broz
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include "crypto_backend.h"
#if HAVE_ARGON2_H
#include <argon2.h>
#else
#include "argon2/argon2.h"
#endif
#define CONST_CAST(x) (x)(uintptr_t)
int argon2(const char *type, const char *password, size_t password_length,
const char *salt, size_t salt_length,
char *key, size_t key_length,
uint32_t iterations, uint32_t memory, uint32_t parallel)
{
#if !USE_INTERNAL_ARGON2 && !HAVE_ARGON2_H
return -EINVAL;
#else
argon2_type atype;
argon2_context context = {
.flags = ARGON2_DEFAULT_FLAGS,
.version = ARGON2_VERSION_NUMBER,
.t_cost = (uint32_t)iterations,
.m_cost = (uint32_t)memory,
.lanes = (uint32_t)parallel,
.threads = (uint32_t)parallel,
.out = (uint8_t *)key,
.outlen = (uint32_t)key_length,
.pwd = CONST_CAST(uint8_t *)password,
.pwdlen = (uint32_t)password_length,
.salt = CONST_CAST(uint8_t *)salt,
.saltlen = (uint32_t)salt_length,
};
int r;
if (!strcmp(type, "argon2i"))
atype = Argon2_i;
else if(!strcmp(type, "argon2id"))
atype = Argon2_id;
else
return -EINVAL;
switch (argon2_ctx(&context, atype)) {
case ARGON2_OK:
r = 0;
break;
case ARGON2_MEMORY_ALLOCATION_ERROR:
case ARGON2_FREE_MEMORY_CBK_NULL:
case ARGON2_ALLOCATE_MEMORY_CBK_NULL:
r = -ENOMEM;
break;
default:
r = -EINVAL;
}
return r;
#endif
}
#if 0
#include <stdio.h>
struct test_vector {
argon2_type type;
unsigned int memory;
unsigned int iterations;
unsigned int parallelism;
const char *password;
unsigned int password_length;
const char *salt;
unsigned int salt_length;
const char *key;
unsigned int key_length;
const char *ad;
unsigned int ad_length;
const char *output;
unsigned int output_length;
};
struct test_vector test_vectors[] = {
/* Argon2 RFC */
{
Argon2_i, 32, 3, 4,
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01", 32,
"\x02\x02\x02\x02\x02\x02\x02\x02"
"\x02\x02\x02\x02\x02\x02\x02\x02", 16,
"\x03\x03\x03\x03\x03\x03\x03\x03", 8,
"\x04\x04\x04\x04\x04\x04\x04\x04"
"\x04\x04\x04\x04", 12,
"\xc8\x14\xd9\xd1\xdc\x7f\x37\xaa"
"\x13\xf0\xd7\x7f\x24\x94\xbd\xa1"
"\xc8\xde\x6b\x01\x6d\xd3\x88\xd2"
"\x99\x52\xa4\xc4\x67\x2b\x6c\xe8", 32
},
{
Argon2_id, 32, 3, 4,
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01"
"\x01\x01\x01\x01\x01\x01\x01\x01", 32,
"\x02\x02\x02\x02\x02\x02\x02\x02"
"\x02\x02\x02\x02\x02\x02\x02\x02", 16,
"\x03\x03\x03\x03\x03\x03\x03\x03", 8,
"\x04\x04\x04\x04\x04\x04\x04\x04"
"\x04\x04\x04\x04", 12,
"\x0d\x64\x0d\xf5\x8d\x78\x76\x6c"
"\x08\xc0\x37\xa3\x4a\x8b\x53\xc9"
"\xd0\x1e\xf0\x45\x2d\x75\xb6\x5e"
"\xb5\x25\x20\xe9\x6b\x01\xe6\x59", 32
}
};
static void printhex(const char *s, const char *buf, size_t len)
{
size_t i;
printf("%s: ", s);
for (i = 0; i < len; i++)
printf("\\x%02x", (unsigned char)buf[i]);
printf("\n");
fflush(stdout);
}
static int argon2_test_vectors(void)
{
char result[64];
int i, r;
struct test_vector *vec;
argon2_context context;
printf("Argon2 running test vectors\n");
for (i = 0; i < (sizeof(test_vectors) / sizeof(*test_vectors)); i++) {
vec = &test_vectors[i];
memset(result, 0, sizeof(result));
memset(&context, 0, sizeof(context));
context.flags = ARGON2_DEFAULT_FLAGS;
context.version = ARGON2_VERSION_NUMBER;
context.out = (uint8_t *)result;
context.outlen = (uint32_t)vec->output_length;
context.pwd = (uint8_t *)vec->password;
context.pwdlen = (uint32_t)vec->password_length;
context.salt = (uint8_t *)vec->salt;
context.saltlen = (uint32_t)vec->salt_length;
context.secret = (uint8_t *)vec->key;
context.secretlen = (uint32_t)vec->key_length;;
context.ad = (uint8_t *)vec->ad;
context.adlen = (uint32_t)vec->ad_length;
context.t_cost = vec->iterations;
context.m_cost = vec->memory;
context.lanes = vec->parallelism;
context.threads = vec->parallelism;
r = argon2_ctx(&context, vec->type);
if (r != ARGON2_OK) {
printf("Argon2 failed %i, vector %d\n", r, i);
return -EINVAL;
}
if (memcmp(result, vec->output, vec->output_length) != 0) {
printf("vector %u\n", i);
printhex(" got", result, vec->output_length);
printhex("want", vec->output, vec->output_length);
return -EINVAL;
}
}
return 0;
}
#endif
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