106 lines
4.4 KiB
C
106 lines
4.4 KiB
C
//==============================================================================
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// This file is part of Master Password.
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// Copyright (c) 2011-2017, Maarten Billemont.
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//
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// Master Password is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Master Password is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You can find a copy of the GNU General Public License in the
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// LICENSE file. Alternatively, see <http://www.gnu.org/licenses/>.
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//==============================================================================
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#include <string.h>
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#include <errno.h>
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#include "mpw-util.h"
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#define MP_N 32768LU
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#define MP_r 8U
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#define MP_p 2U
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#define MP_otp_window 5 * 60 /* s */
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// Inherited functions.
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MPSiteKey mpw_siteKey_v2(
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MPMasterKey masterKey, const char *siteName, MPCounterValue siteCounter,
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MPKeyPurpose keyPurpose, const char *keyContext);
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const char *mpw_sitePasswordFromTemplate_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *resultParam);
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const char *mpw_sitePasswordFromCrypt_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *cipherText);
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const char *mpw_sitePasswordFromDerive_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *resultParam);
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const char *mpw_siteState_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *state);
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// Algorithm version overrides.
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static MPMasterKey mpw_masterKey_v3(
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const char *fullName, const char *masterPassword) {
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const char *keyScope = mpw_scopeForPurpose( MPKeyPurposeAuthentication );
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trc( "keyScope: %s\n", keyScope );
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// Calculate the master key salt.
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trc( "masterKeySalt: keyScope=%s | #fullName=%s | fullName=%s\n",
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keyScope, mpw_hex_l( (uint32_t)strlen( fullName ) ), fullName );
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size_t masterKeySaltSize = 0;
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uint8_t *masterKeySalt = NULL;
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mpw_push_string( &masterKeySalt, &masterKeySaltSize, keyScope );
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mpw_push_int( &masterKeySalt, &masterKeySaltSize, (uint32_t)strlen( fullName ) );
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mpw_push_string( &masterKeySalt, &masterKeySaltSize, fullName );
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if (!masterKeySalt) {
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err( "Could not allocate master key salt: %s\n", strerror( errno ) );
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return NULL;
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}
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trc( " => masterKeySalt.id: %s\n", mpw_id_buf( masterKeySalt, masterKeySaltSize ) );
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// Calculate the master key.
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trc( "masterKey: scrypt( masterPassword, masterKeySalt, N=%lu, r=%u, p=%u )\n", MP_N, MP_r, MP_p );
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MPMasterKey masterKey = mpw_kdf_scrypt( MPMasterKeySize, masterPassword, masterKeySalt, masterKeySaltSize, MP_N, MP_r, MP_p );
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mpw_free( &masterKeySalt, masterKeySaltSize );
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if (!masterKey) {
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err( "Could not derive master key: %s\n", strerror( errno ) );
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return NULL;
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}
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trc( " => masterKey.id: %s\n", mpw_id_buf( masterKey, MPMasterKeySize ) );
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return masterKey;
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}
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static MPSiteKey mpw_siteKey_v3(
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MPMasterKey masterKey, const char *siteName, MPCounterValue siteCounter,
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MPKeyPurpose keyPurpose, const char *keyContext) {
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return mpw_siteKey_v2( masterKey, siteName, siteCounter, keyPurpose, keyContext );
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}
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static const char *mpw_sitePasswordFromTemplate_v3(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *resultParam) {
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return mpw_sitePasswordFromTemplate_v2( masterKey, siteKey, resultType, resultParam );
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}
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static const char *mpw_sitePasswordFromCrypt_v3(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *cipherText) {
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return mpw_sitePasswordFromCrypt_v2( masterKey, siteKey, resultType, cipherText );
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}
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static const char *mpw_sitePasswordFromDerive_v3(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *resultParam) {
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return mpw_sitePasswordFromDerive_v2( masterKey, siteKey, resultType, resultParam );
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}
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static const char *mpw_siteState_v3(
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MPMasterKey masterKey, MPSiteKey siteKey, MPResultType resultType, const char *state) {
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return mpw_siteState_v2( masterKey, siteKey, resultType, state );
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}
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