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#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "argon2-core.h"
#include "argon2-encoding.h"
#include "argon2.h"
#include "crypto_pwhash.h"
#include "crypto_pwhash_argon2i.h"
#include "crypto_pwhash_argon2id.h"
#include "private/common.h"
#include "randombytes.h"
#include "utils.h"
#define STR_HASHBYTES 32U
int
crypto_pwhash_argon2i_alg_argon2i13(void)
{
return crypto_pwhash_argon2i_ALG_ARGON2I13;
}
size_t
crypto_pwhash_argon2i_bytes_min(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_BYTES_MIN >= ARGON2_MIN_OUTLEN);
return crypto_pwhash_argon2i_BYTES_MIN;
}
size_t
crypto_pwhash_argon2i_bytes_max(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_BYTES_MAX <= ARGON2_MAX_OUTLEN);
return crypto_pwhash_argon2i_BYTES_MAX;
}
size_t
crypto_pwhash_argon2i_passwd_min(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_PASSWD_MIN >= ARGON2_MIN_PWD_LENGTH);
return crypto_pwhash_argon2i_PASSWD_MIN;
}
size_t
crypto_pwhash_argon2i_passwd_max(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_PASSWD_MAX <= ARGON2_MAX_PWD_LENGTH);
return crypto_pwhash_argon2i_PASSWD_MAX;
}
size_t
crypto_pwhash_argon2i_saltbytes(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_SALTBYTES >= ARGON2_MIN_SALT_LENGTH);
COMPILER_ASSERT(crypto_pwhash_argon2i_SALTBYTES <= ARGON2_MAX_SALT_LENGTH);
return crypto_pwhash_argon2i_SALTBYTES;
}
size_t
crypto_pwhash_argon2i_strbytes(void)
{
return crypto_pwhash_argon2i_STRBYTES;
}
const char*
crypto_pwhash_argon2i_strprefix(void)
{
return crypto_pwhash_argon2i_STRPREFIX;
}
size_t
crypto_pwhash_argon2i_opslimit_min(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_OPSLIMIT_MIN >= ARGON2_MIN_TIME);
return crypto_pwhash_argon2i_OPSLIMIT_MIN;
}
size_t
crypto_pwhash_argon2i_opslimit_max(void)
{
COMPILER_ASSERT(crypto_pwhash_argon2i_OPSLIMIT_MAX <= ARGON2_MAX_TIME);
return crypto_pwhash_argon2i_OPSLIMIT_MAX;
}
size_t
crypto_pwhash_argon2i_memlimit_min(void)
{
COMPILER_ASSERT((crypto_pwhash_argon2i_MEMLIMIT_MIN / 1024U) >= ARGON2_MIN_MEMORY);
return crypto_pwhash_argon2i_MEMLIMIT_MIN;
}
size_t
crypto_pwhash_argon2i_memlimit_max(void)
{
COMPILER_ASSERT((crypto_pwhash_argon2i_MEMLIMIT_MAX / 1024U) <= ARGON2_MAX_MEMORY);
return crypto_pwhash_argon2i_MEMLIMIT_MAX;
}
size_t
crypto_pwhash_argon2i_opslimit_interactive(void)
{
return crypto_pwhash_argon2i_OPSLIMIT_INTERACTIVE;
}
size_t
crypto_pwhash_argon2i_memlimit_interactive(void)
{
return crypto_pwhash_argon2i_MEMLIMIT_INTERACTIVE;
}
size_t
crypto_pwhash_argon2i_opslimit_moderate(void)
{
return crypto_pwhash_argon2i_OPSLIMIT_MODERATE;
}
size_t
crypto_pwhash_argon2i_memlimit_moderate(void)
{
return crypto_pwhash_argon2i_MEMLIMIT_MODERATE;
}
size_t
crypto_pwhash_argon2i_opslimit_sensitive(void)
{
return crypto_pwhash_argon2i_OPSLIMIT_SENSITIVE;
}
size_t
crypto_pwhash_argon2i_memlimit_sensitive(void)
{
return crypto_pwhash_argon2i_MEMLIMIT_SENSITIVE;
}
int
crypto_pwhash_argon2i(unsigned char *const out, unsigned long long outlen,
const char *const passwd, unsigned long long passwdlen,
const unsigned char *const salt,
unsigned long long opslimit, size_t memlimit, int alg)
{
memset(out, 0, outlen);
if (outlen > crypto_pwhash_argon2i_BYTES_MAX) {
errno = EFBIG;
return -1;
}
if (outlen < crypto_pwhash_argon2i_BYTES_MIN) {
errno = EINVAL;
return -1;
}
if (passwdlen > crypto_pwhash_argon2i_PASSWD_MAX ||
opslimit > crypto_pwhash_argon2i_OPSLIMIT_MAX ||
memlimit > crypto_pwhash_argon2i_MEMLIMIT_MAX) {
errno = EFBIG;
return -1;
}
if (passwdlen < crypto_pwhash_argon2i_PASSWD_MIN ||
opslimit < crypto_pwhash_argon2i_OPSLIMIT_MIN ||
memlimit < crypto_pwhash_argon2i_MEMLIMIT_MIN) {
errno = EINVAL;
return -1;
}
switch (alg) {
case crypto_pwhash_argon2i_ALG_ARGON2I13:
if (argon2i_hash_raw((uint32_t) opslimit, (uint32_t) (memlimit / 1024U),
(uint32_t) 1U, passwd, (size_t) passwdlen, salt,
(size_t) crypto_pwhash_argon2i_SALTBYTES, out,
(size_t) outlen) != ARGON2_OK) {
return -1; /* LCOV_EXCL_LINE */
}
return 0;
default:
errno = EINVAL;
return -1;
}
}
int
crypto_pwhash_argon2i_str(char out[crypto_pwhash_argon2i_STRBYTES],
const char *const passwd,
unsigned long long passwdlen,
unsigned long long opslimit, size_t memlimit)
{
unsigned char salt[crypto_pwhash_argon2i_SALTBYTES];
memset(out, 0, crypto_pwhash_argon2i_STRBYTES);
if (passwdlen > crypto_pwhash_argon2i_PASSWD_MAX ||
opslimit > crypto_pwhash_argon2i_OPSLIMIT_MAX ||
memlimit > crypto_pwhash_argon2i_MEMLIMIT_MAX) {
errno = EFBIG;
return -1;
}
if (passwdlen < crypto_pwhash_argon2i_PASSWD_MIN ||
opslimit < crypto_pwhash_argon2i_OPSLIMIT_MIN ||
memlimit < crypto_pwhash_argon2i_MEMLIMIT_MIN) {
errno = EINVAL;
return -1;
}
randombytes_buf(salt, sizeof salt);
if (argon2i_hash_encoded((uint32_t) opslimit, (uint32_t) (memlimit / 1024U),
(uint32_t) 1U, passwd, (size_t) passwdlen, salt,
sizeof salt, STR_HASHBYTES, out,
crypto_pwhash_argon2i_STRBYTES) != ARGON2_OK) {
return -1; /* LCOV_EXCL_LINE */
}
return 0;
}
int
crypto_pwhash_argon2i_str_verify(const char str[crypto_pwhash_argon2i_STRBYTES],
const char *const passwd,
unsigned long long passwdlen)
{
int verify_ret;
if (passwdlen > crypto_pwhash_argon2i_PASSWD_MAX) {
errno = EFBIG;
return -1;
}
/* LCOV_EXCL_START */
if (passwdlen < crypto_pwhash_argon2i_PASSWD_MIN) {
errno = EINVAL;
return -1;
}
/* LCOV_EXCL_STOP */
verify_ret = argon2i_verify(str, passwd, (size_t) passwdlen);
if (verify_ret == ARGON2_OK) {
return 0;
}
if (verify_ret == ARGON2_VERIFY_MISMATCH) {
errno = EINVAL;
}
return -1;
}
static int
_needs_rehash(const char *str, unsigned long long opslimit, size_t memlimit,
argon2_type type)
{
unsigned char *fodder;
argon2_context ctx;
size_t fodder_len;
int ret = -1;
fodder_len = strlen(str);
memlimit /= 1024U;
if (opslimit > UINT32_MAX || memlimit > UINT32_MAX ||
fodder_len >= crypto_pwhash_STRBYTES) {
errno = EINVAL;
return -1;
}
memset(&ctx, 0, sizeof ctx);
if ((fodder = (unsigned char *) calloc(fodder_len, 1U)) == NULL) {
return -1; /* LCOV_EXCL_LINE */
}
ctx.out = ctx.pwd = ctx.salt = fodder;
ctx.outlen = ctx.pwdlen = ctx.saltlen = (uint32_t) fodder_len;
ctx.ad = ctx.secret = NULL;
ctx.adlen = ctx.secretlen = 0U;
if (decode_string(&ctx, str, type) != 0) {
errno = EINVAL;
ret = -1;
} else if (ctx.t_cost != (uint32_t) opslimit ||
ctx.m_cost != (uint32_t) memlimit) {
ret = 1;
} else {
ret = 0;
}
free(fodder);
return ret;
}
int
crypto_pwhash_argon2i_str_needs_rehash(const char str[crypto_pwhash_argon2i_STRBYTES],
unsigned long long opslimit, size_t memlimit)
{
return _needs_rehash(str, opslimit, memlimit, Argon2_i);
}
int
crypto_pwhash_argon2id_str_needs_rehash(const char str[crypto_pwhash_argon2id_STRBYTES],
unsigned long long opslimit, size_t memlimit)
{
return _needs_rehash(str, opslimit, memlimit, Argon2_id);
}
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