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/*
* Copyright (c) 2024 Vaughn Nugent
*
* vnlib_monocypher is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 2 of the License,
* or (at your option) any later version.
*
* vnlib_monocypher 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with vnlib_monocypher. If not, see http://www.gnu.org/licenses/.
*/
#include "argon2.h"
#include <monocypher.h>
#define ARGON2_WORK_AREA_MULTIPLIER 1024
VNLIB_EXPORT uint32_t VNLIB_CC Argon2CalcWorkAreaSize(const argon2Ctx* context)
{
return context->m_cost * ARGON2_WORK_AREA_MULTIPLIER;
}
/*
* The purpose of this function is to remap the Argon2 context/function call
* interface to the Monocypher library version. Also performing some basic
* input validation that also matches the Argon2 library.
*/
VNLIB_EXPORT argon2_error_codes VNLIB_CC Argon2ComputeHash(const argon2Ctx* context, void* workArea)
{
crypto_argon2_config config;
crypto_argon2_inputs inputs;
crypto_argon2_extras extras;
if (!context || !workArea)
{
return ERR_INVALID_PTR;
}
config.algorithm = context->version;
config.nb_blocks = context->m_cost;
config.nb_passes = context->t_cost;
config.nb_lanes = context->threads;
inputs.pass_size = context->pwdlen;
inputs.pass = context->pwd;
inputs.salt_size = context->saltlen;
inputs.salt = context->salt;
/* must specify a password input */
if (inputs.pass_size < 1)
{
return ARGON2_PWD_TOO_SHORT;
}
if (!inputs.pass)
{
return ARGON2_PWD_PTR_MISMATCH;
}
if (inputs.salt_size < 1)
{
return ARGON2_SALT_TOO_SHORT;
}
/* Verify salt pointer 1is not invalid */
if (!inputs.salt)
{
return ARGON2_SALT_PTR_MISMATCH;
}
extras.ad = context->ad;
extras.ad_size = context->adlen;
extras.key = context->secret;
extras.key_size = context->secretlen;
//If key is set, verify a valid pointer
if (extras.key_size > 0 && !extras.key)
{
return ARGON2_SECRET_PTR_MISMATCH;
}
if (context->outlen < 1)
{
return ARGON2_OUTPUT_TOO_SHORT;
}
if (!context->out)
{
return ARGON2_OUTPUT_PTR_NULL;
}
/* invoke lib function */
crypto_argon2(context->out, context->outlen, workArea, config, inputs, extras);
return ARGON2_OK;
}
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