コード例 #1
0
static const uint8_t *mpw_masterKeyForUser_v1(const char *fullName, const char *masterPassword) {

    const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
    trc( "algorithm: v%d\n", 1 );
    trc( "fullName: %s (%zu)\n", fullName, mpw_utf8_strlen( fullName ) );
    trc( "masterPassword: %s\n", masterPassword );
    trc( "key scope: %s\n", mpKeyScope );

    // Calculate the master key salt.
    // masterKeySalt = mpKeyScope . #fullName . fullName
    size_t masterKeySaltSize = 0;
    uint8_t *masterKeySalt = NULL;
    mpw_push_string( &masterKeySalt, &masterKeySaltSize, mpKeyScope );
    mpw_push_int( &masterKeySalt, &masterKeySaltSize, htonl( mpw_utf8_strlen( fullName ) ) );
    mpw_push_string( &masterKeySalt, &masterKeySaltSize, fullName );
    if (!masterKeySalt) {
        ftl( "Could not allocate master key salt: %d\n", errno );
        return NULL;
    }
    trc( "masterKeySalt ID: %s\n", mpw_id_buf( masterKeySalt, masterKeySaltSize ) );

    // Calculate the master key.
    // masterKey = scrypt( masterPassword, masterKeySalt )
    const uint8_t *masterKey = mpw_scrypt( MP_dkLen, masterPassword, masterKeySalt, masterKeySaltSize, MP_N, MP_r, MP_p );
    mpw_free( masterKeySalt, masterKeySaltSize );
    if (!masterKey) {
        ftl( "Could not allocate master key: %d\n", errno );
        return NULL;
    }
    trc( "masterKey ID: %s\n", mpw_id_buf( masterKey, MP_dkLen ) );

    return masterKey;
}
コード例 #2
0
// Algorithm version overrides.
static MPMasterKey mpw_masterKey_v3(
        const char *fullName, const char *masterPassword) {

    const char *keyScope = mpw_scopeForPurpose( MPKeyPurposeAuthentication );
    trc( "keyScope: %s", keyScope );

    // Calculate the master key salt.
    trc( "masterKeySalt: keyScope=%s | #fullName=%s | fullName=%s",
            keyScope, mpw_hex_l( (uint32_t)strlen( fullName ) ), fullName );
    size_t masterKeySaltSize = 0;
    uint8_t *masterKeySalt = NULL;
    mpw_push_string( &masterKeySalt, &masterKeySaltSize, keyScope );
    mpw_push_int( &masterKeySalt, &masterKeySaltSize, (uint32_t)strlen( fullName ) );
    mpw_push_string( &masterKeySalt, &masterKeySaltSize, fullName );
    if (!masterKeySalt) {
        err( "Could not allocate master key salt: %s", strerror( errno ) );
        return NULL;
    }
    trc( "  => masterKeySalt.id: %s", mpw_id_buf( masterKeySalt, masterKeySaltSize ) );

    // Calculate the master key.
    trc( "masterKey: scrypt( masterPassword, masterKeySalt, N=%lu, r=%u, p=%u )", MP_N, MP_r, MP_p );
    MPMasterKey masterKey = mpw_kdf_scrypt( MPMasterKeySize,
            (uint8_t *)masterPassword, strlen( masterPassword ), masterKeySalt, masterKeySaltSize, MP_N, MP_r, MP_p );
    mpw_free( &masterKeySalt, masterKeySaltSize );
    if (!masterKey) {
        err( "Could not derive master key: %s", strerror( errno ) );
        return NULL;
    }
    trc( "  => masterKey.id: %s", mpw_id_buf( masterKey, MPMasterKeySize ) );

    return masterKey;
}
コード例 #3
0
ファイル: mpw-algorithm.c プロジェクト: Lyndir/MasterPassword
MPMasterKey mpw_masterKey(const char *fullName, const char *masterPassword, const MPAlgorithmVersion algorithmVersion) {

    if (fullName && !strlen( fullName ))
        fullName = NULL;
    if (masterPassword && !strlen( masterPassword ))
        masterPassword = NULL;

    trc( "-- mpw_masterKey (algorithm: %u)", algorithmVersion );
    trc( "fullName: %s", fullName );
    trc( "masterPassword.id: %s", masterPassword? mpw_id_buf( masterPassword, strlen( masterPassword ) ): NULL );
    if (!fullName || !masterPassword)
        return NULL;

    switch (algorithmVersion) {
        case MPAlgorithmVersion0:
            return mpw_masterKey_v0( fullName, masterPassword );
        case MPAlgorithmVersion1:
            return mpw_masterKey_v1( fullName, masterPassword );
        case MPAlgorithmVersion2:
            return mpw_masterKey_v2( fullName, masterPassword );
        case MPAlgorithmVersion3:
            return mpw_masterKey_v3( fullName, masterPassword );
        default:
            err( "Unsupported version: %d", algorithmVersion );
            return NULL;
    }
}
コード例 #4
0
static const char *mpw_passwordForSite_v1(const uint8_t *masterKey, const char *siteName, const MPSiteType siteType, const uint32_t siteCounter,
        const MPSiteVariant siteVariant, const char *siteContext) {

    const char *siteScope = mpw_scopeForVariant( siteVariant );
    trc( "algorithm: v%d\n", 1 );
    trc( "siteName: %s\n", siteName );
    trc( "siteCounter: %d\n", siteCounter );
    trc( "siteVariant: %d\n", siteVariant );
    trc( "siteType: %d\n", siteType );
    trc( "site scope: %s, context: %s\n", siteScope, siteContext? "<empty>": siteContext );
    trc( "seed from: hmac-sha256(masterKey, %s | %s | %s | %s | %s | %s)\n",
            siteScope, mpw_hex_l( htonl( strlen( siteName ) ) ), siteName,
            mpw_hex_l( htonl( siteCounter ) ),
            mpw_hex_l( htonl( siteContext? strlen( siteContext ): 0 ) ), siteContext? "(null)": siteContext );

    // Calculate the site seed.
    // sitePasswordSeed = hmac-sha256( masterKey, siteScope . #siteName . siteName . siteCounter . #siteContext . siteContext )
    size_t sitePasswordInfoSize = 0;
    uint8_t *sitePasswordInfo = NULL;
    mpw_push_string( &sitePasswordInfo, &sitePasswordInfoSize, siteScope );
    mpw_push_int( &sitePasswordInfo, &sitePasswordInfoSize, htonl( mpw_utf8_strlen( siteName ) ) );
    mpw_push_string( &sitePasswordInfo, &sitePasswordInfoSize, siteName );
    mpw_push_int( &sitePasswordInfo, &sitePasswordInfoSize, htonl( siteCounter ) );
    if (siteContext) {
        mpw_push_int( &sitePasswordInfo, &sitePasswordInfoSize, htonl( mpw_utf8_strlen( siteContext ) ) );
        mpw_push_string( &sitePasswordInfo, &sitePasswordInfoSize, siteContext );
    }
    if (!sitePasswordInfo) {
        ftl( "Could not allocate site seed info: %d\n", errno );
        return NULL;
    }
    trc( "sitePasswordInfo ID: %s\n", mpw_id_buf( sitePasswordInfo, sitePasswordInfoSize ) );

    const uint8_t *sitePasswordSeed = mpw_hmac_sha256( masterKey, MP_dkLen, sitePasswordInfo, sitePasswordInfoSize );
    mpw_free( sitePasswordInfo, sitePasswordInfoSize );
    if (!sitePasswordSeed) {
        ftl( "Could not allocate site seed: %d\n", errno );
        return NULL;
    }
    trc( "sitePasswordSeed ID: %s\n", mpw_id_buf( sitePasswordSeed, 32 ) );

    // Determine the template.
    const char *template = mpw_templateForType( siteType, sitePasswordSeed[0] );
コード例 #5
0
static MPSiteKey mpw_siteKey_v2(
        MPMasterKey masterKey, const char *siteName, MPCounterValue siteCounter,
        MPKeyPurpose keyPurpose, const char *keyContext) {

    const char *keyScope = mpw_scopeForPurpose( keyPurpose );
    trc( "keyScope: %s", keyScope );

    // OTP counter value.
    if (siteCounter == MPCounterValueTOTP)
        siteCounter = ((uint32_t)time( NULL ) / MP_otp_window) * MP_otp_window;

    // Calculate the site seed.
    trc( "siteSalt: keyScope=%s | #siteName=%s | siteName=%s | siteCounter=%s | #keyContext=%s | keyContext=%s",
            keyScope, mpw_hex_l( (uint32_t)strlen( siteName ) ), siteName, mpw_hex_l( siteCounter ),
            keyContext? mpw_hex_l( (uint32_t)strlen( keyContext ) ): NULL, keyContext );
    size_t siteSaltSize = 0;
    uint8_t *siteSalt = NULL;
    mpw_push_string( &siteSalt, &siteSaltSize, keyScope );
    mpw_push_int( &siteSalt, &siteSaltSize, (uint32_t)strlen( siteName ) );
    mpw_push_string( &siteSalt, &siteSaltSize, siteName );
    mpw_push_int( &siteSalt, &siteSaltSize, siteCounter );
    if (keyContext) {
        mpw_push_int( &siteSalt, &siteSaltSize, (uint32_t)strlen( keyContext ) );
        mpw_push_string( &siteSalt, &siteSaltSize, keyContext );
    }
    if (!siteSalt) {
        err( "Could not allocate site salt: %s", strerror( errno ) );
        return NULL;
    }
    trc( "  => siteSalt.id: %s", mpw_id_buf( siteSalt, siteSaltSize ) );

    trc( "siteKey: hmac-sha256( masterKey.id=%s, siteSalt )",
            mpw_id_buf( masterKey, MPMasterKeySize ) );
    MPSiteKey siteKey = mpw_hash_hmac_sha256( masterKey, MPMasterKeySize, siteSalt, siteSaltSize );
    mpw_free( &siteSalt, siteSaltSize );
    if (!siteKey) {
        err( "Could not derive site key: %s", strerror( errno ) );
        return NULL;
    }
    trc( "  => siteKey.id: %s", mpw_id_buf( siteKey, MPSiteKeySize ) );

    return siteKey;
}