115 lines
4.7 KiB
C
115 lines
4.7 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 <arpa/inet.h>
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#include "mpw-types.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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// Inherited functions.
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MPMasterKey mpw_masterKey_v1(
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const char *fullName, const char *masterPassword);
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const char *mpw_sitePasswordFromTemplate_v1(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *resultParam);
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const char *mpw_sitePasswordFromCrypt_v1(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *cipherText);
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const char *mpw_sitePasswordFromDerive_v1(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *resultParam);
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const char *mpw_siteState_v1(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *state);
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// Algorithm version overrides.
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static MPMasterKey mpw_masterKey_v2(
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const char *fullName, const char *masterPassword) {
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return mpw_masterKey_v1( fullName, masterPassword );
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}
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static MPSiteKey mpw_siteKey_v2(
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MPMasterKey masterKey, const char *siteName, const MPCounterValue siteCounter,
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const MPKeyPurpose keyPurpose, const char *keyContext) {
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const char *keyScope = mpw_scopeForPurpose( keyPurpose );
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trc( "keyScope: %s\n", keyScope );
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// TODO: Implement MPCounterValueTOTP
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// Calculate the site seed.
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trc( "siteSalt: keyScope=%s | #siteName=%s | siteName=%s | siteCounter=%s | #keyContext=%s | keyContext=%s\n",
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keyScope, mpw_hex_l( htonl( strlen( siteName ) ) ), siteName, mpw_hex_l( htonl( siteCounter ) ),
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keyContext? mpw_hex_l( htonl( strlen( keyContext ) ) ): NULL, keyContext );
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size_t siteSaltSize = 0;
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uint8_t *siteSalt = NULL;
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mpw_push_string( &siteSalt, &siteSaltSize, keyScope );
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mpw_push_int( &siteSalt, &siteSaltSize, htonl( strlen( siteName ) ) );
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mpw_push_string( &siteSalt, &siteSaltSize, siteName );
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mpw_push_int( &siteSalt, &siteSaltSize, htonl( siteCounter ) );
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if (keyContext) {
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mpw_push_int( &siteSalt, &siteSaltSize, htonl( strlen( keyContext ) ) );
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mpw_push_string( &siteSalt, &siteSaltSize, keyContext );
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}
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if (!siteSalt || !siteSaltSize) {
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err( "Could not allocate site salt: %s\n", strerror( errno ) );
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mpw_free( siteSalt, siteSaltSize );
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return NULL;
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}
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trc( " => siteSalt.id: %s\n", mpw_id_buf( siteSalt, siteSaltSize ) );
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trc( "siteKey: hmac-sha256( masterKey.id=%s, siteSalt )\n",
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mpw_id_buf( masterKey, MPMasterKeySize ) );
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MPSiteKey siteKey = mpw_hash_hmac_sha256( masterKey, MPMasterKeySize, siteSalt, siteSaltSize );
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mpw_free( siteSalt, siteSaltSize );
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if (!siteKey) {
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err( "Could not allocate site key: %s\n", strerror( errno ) );
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return NULL;
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}
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trc( " => siteKey.id: %s\n", mpw_id_buf( siteKey, MPSiteKeySize ) );
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return siteKey;
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}
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static const char *mpw_sitePasswordFromTemplate_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *resultParam) {
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return mpw_sitePasswordFromTemplate_v1( masterKey, siteKey, resultType, resultParam );
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}
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static const char *mpw_sitePasswordFromCrypt_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *cipherText) {
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return mpw_sitePasswordFromCrypt_v1( masterKey, siteKey, resultType, cipherText );
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}
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static const char *mpw_sitePasswordFromDerive_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *resultParam) {
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return mpw_sitePasswordFromDerive_v1( masterKey, siteKey, resultType, resultParam );
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}
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static const char *mpw_siteState_v2(
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MPMasterKey masterKey, MPSiteKey siteKey, const MPResultType resultType, const char *state) {
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return mpw_siteState_v1( masterKey, siteKey, resultType, state );
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}
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