static const char *mpw_passwordForSite_v3(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 );
// Calculate the site seed.
// sitePasswordSeed = hmac-sha256( masterKey, siteScope . #siteName . siteName . siteCounter . #siteContext . siteContext )
size_t sitePasswordInfoSize = 0;
uint8_t *sitePasswordInfo = NULL;
mpw_pushString( &sitePasswordInfo, &sitePasswordInfoSize, siteScope );
mpw_pushInt( &sitePasswordInfo, &sitePasswordInfoSize, htonl( strlen( siteName ) ) );
mpw_pushString( &sitePasswordInfo, &sitePasswordInfoSize, siteName );
mpw_pushInt( &sitePasswordInfo, &sitePasswordInfoSize, htonl( siteCounter ) );
if (siteContext) {
mpw_pushInt( &sitePasswordInfo, &sitePasswordInfoSize, htonl( strlen( siteContext ) ) );
mpw_pushString( &sitePasswordInfo, &sitePasswordInfoSize, siteContext );
}
if (!sitePasswordInfo) {
return NULL;
}
const uint8_t *sitePasswordSeed = mpw_hmac_sha256( masterKey, MP_dkLen, sitePasswordInfo, sitePasswordInfoSize );
mpw_free( sitePasswordInfo, sitePasswordInfoSize );
if (!sitePasswordSeed) {
return NULL;
}
// Determine the template.
const char *template = mpw_templateForType( siteType, sitePasswordSeed[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;
}
static const uint8_t *mpw_masterKeyForUser_v3(const char *fullName, const char *masterPassword) {
const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
// Calculate the master key salt.
// masterKeySalt = mpKeyScope . #fullName . fullName
size_t masterKeySaltSize = 0;
uint8_t *masterKeySalt = NULL;
mpw_pushString( &masterKeySalt, &masterKeySaltSize, mpKeyScope );
mpw_pushInt( &masterKeySalt, &masterKeySaltSize, htonl( strlen( fullName ) ) );
mpw_pushString( &masterKeySalt, &masterKeySaltSize, fullName );
if (!masterKeySalt) {
return NULL;
}
// 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) {
return NULL;
}
return masterKey;
}
// 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;
}
uint8_t const *mpw_scrypt(const size_t keySize, const char *secret, const uint8_t *salt, const size_t saltSize,
uint64_t N, uint32_t r, uint32_t p) {
uint8_t *key = malloc( keySize );
if (!key)
return NULL;
if (crypto_scrypt( (const uint8_t *)secret, strlen( secret ), salt, saltSize, N, r, p, key, keySize ) < 0) {
mpw_free( key, keySize );
return NULL;
}
return key;
}
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] );
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;
}
void mpw_pushBuf(uint8_t **const buffer, size_t *const bufferSize, const void *pushBuffer, const size_t pushSize) {
if (*bufferSize == (size_t)-1)
// The buffer was marked as broken, it is missing a previous push. Abort to avoid corrupt content.
return;
*bufferSize += pushSize;
uint8_t *resizedBuffer = realloc( *buffer, *bufferSize );
if (!resizedBuffer) {
// realloc failed, we can't push. Mark the buffer as broken.
mpw_free( *buffer, *bufferSize - pushSize );
*bufferSize = (size_t)-1;
*buffer = NULL;
return;
}
*buffer = resizedBuffer;
uint8_t *pushDst = *buffer + *bufferSize - pushSize;
memcpy( pushDst, pushBuffer, pushSize );
}
MPIdenticon mpw_identicon(const char *fullName, const char *masterPassword) {
const char *leftArm[] = { "╔", "╚", "╰", "═" };
const char *rightArm[] = { "╗", "╝", "╯", "═" };
const char *body[] = { "█", "░", "▒", "▓", "☺", "☻" };
const char *accessory[] = {
"◈", "◎", "◐", "◑", "◒", "◓", "☀", "☁", "☂", "☃", "", "★", "☆", "☎", "☏", "⎈", "⌂", "☘", "☢", "☣",
"☕", "⌚", "⌛", "⏰", "⚡", "⛄", "⛅", "☔", "♔", "♕", "♖", "♗", "♘", "♙", "♚", "♛", "♜", "♝", "♞", "♟",
"♨", "♩", "♪", "♫", "⚐", "⚑", "⚔", "⚖", "⚙", "⚠", "⌘", "⏎", "✄", "✆", "✈", "✉", "✌"
};
const uint8_t *identiconSeed = NULL;
if (fullName && strlen( fullName ) && masterPassword && strlen( masterPassword ))
identiconSeed = mpw_hash_hmac_sha256(
(const uint8_t *)masterPassword, strlen( masterPassword ),
(const uint8_t *)fullName, strlen( fullName ) );
if (!identiconSeed)
return (MPIdenticon){
.leftArm = "",
.body = "",
.rightArm = "",
.accessory = "",
.color=0,
};
MPIdenticon identicon = {
.leftArm = leftArm[identiconSeed[0] % (sizeof( leftArm ) / sizeof( leftArm[0] ))],
.body = body[identiconSeed[1] % (sizeof( body ) / sizeof( body[0] ))],
.rightArm = rightArm[identiconSeed[2] % (sizeof( rightArm ) / sizeof( rightArm[0] ))],
.accessory = accessory[identiconSeed[3] % (sizeof( accessory ) / sizeof( accessory[0] ))],
.color = (uint8_t)(identiconSeed[4] % (MPIdenticonColorLast - MPIdenticonColorFirst + 1) + MPIdenticonColorFirst),
};
mpw_free( &identiconSeed, 32 );
return identicon;
}
void mpw_freeString(const char *string) {
mpw_free( string, strlen( string ) );
}
