Merge 9c1fcc5adc into 44b4bd38b9

.gitmodules

@@ -375,3 +375,6 @@
 [submodule "contrib/postgres"]
 	path = contrib/postgres
 	url = https://github.com/ClickHouse/postgres.git
+[submodule "contrib/libcotp"]
+	path = contrib/libcotp
+	url = https://github.com/paolostivanin/libcotp.git

contrib/CMakeLists.txt

@@ -223,6 +223,8 @@ add_contrib (google-cloud-cpp-cmake google-cloud-cpp) # requires grpc, protobuf,
 
 add_contrib (jwt-cpp-cmake jwt-cpp)
 
+add_contrib (libcotp-cmake libcotp)
+
 # Put all targets defined here and in subdirectories under "contrib/<immediate-subdir>" folders in GUI-based IDEs.
 # Some of third-party projects may override CMAKE_FOLDER or FOLDER property of their targets, so they would not appear
 # in "contrib/..." as originally planned, so we workaround this by fixing FOLDER properties of all targets manually,

contrib/libcotp

@@ -0,0 +1 @@
+Subproject commit 78a3783ac19604e9e3ad7053f1c43c761066bfb4

contrib/libcotp-cmake/CMakeLists.txt

@@ -0,0 +1,22 @@
+if(NOT ENABLE_SSL)
+  message(STATUS "libcotp: DISABLED because ENABLE_SSL=OFF")
+  return()
+endif()
+
+set (LIBCOTP_SOURCE_DIR "${ClickHouse_SOURCE_DIR}/contrib/libcotp")
+set (LIBCOTP_BINARY_DIR "${ClickHouse_BINARY_DIR}/contrib/libcotp")
+
+set(SRCS
+    "${LIBCOTP_SOURCE_DIR}/src/otp.c"
+    "${LIBCOTP_SOURCE_DIR}/src/utils/base32.c"
+    "${LIBCOTP_SOURCE_DIR}/src/utils/whmac_openssl.c"
+)
+
+add_library (_libcotp ${SRCS})
+
+file(MAKE_DIRECTORY "${LIBCOTP_BINARY_DIR}/include")
+file(COPY "${LIBCOTP_SOURCE_DIR}/src/" DESTINATION "${LIBCOTP_BINARY_DIR}/include" FILES_MATCHING PATTERN "*.h")
+target_include_directories(_libcotp SYSTEM BEFORE PUBLIC "${LIBCOTP_BINARY_DIR}/include")
+target_link_libraries(_libcotp PRIVATE OpenSSL::Crypto)
+
+add_library(ch_contrib::libcotp ALIAS _libcotp)

docs/en/operations/external-authenticators/index.md

@@ -17,3 +17,4 @@ The following external authenticators and directories are supported:
 - Kerberos [Authenticator](./kerberos.md#external-authenticators-kerberos)
 - [SSL X.509 authentication](./ssl-x509.md#ssl-external-authentication)
 - HTTP [Authenticator](./http.md)
+- [Time-based one-time password](./totp.md)

docs/en/operations/external-authenticators/totp.md

@@ -0,0 +1,69 @@
+---
+slug: /en/operations/external-authenticators/totp
+title: "TOTP"
+---
+import SelfManaged from '@site/docs/en/_snippets/_self_managed_only_no_roadmap.md';
+
+<SelfManaged />
+
+Time-Based One-Time Password (TOTP) can be used to authenticate ClickHouse users by generating temporary access codes that are valid for a limited time.
+In current implementation it is a standalone authentication method, rather than a second factor for password-based authentication.
+This TOTP authentication method aligns with [RFC 6238](https://datatracker.ietf.org/doc/html/rfc6238) standards, making it compatible with popular TOTP applications like Google Authenticator, 1Password and similar tools.
+
+## TOTP Authentication Configuration {#totp-auth-configuration}
+
+To enable TOTP authentication for a user, configure the `time_based_one_time_password` section in `users.xml`. This section defines the TOTP settings, such as secret, validity period, number of digits, and hash algorithm.
+
+**Example**
+```xml
+<clickhouse>
+    <!-- ... -->
+    <users>
+        <my_user>
+            <!-- TOTP authentication configuration -->
+            <time_based_one_time_password>
+                <secret>JBSWY3DPEHPK3PXP</secret>      <!-- Base32-encoded TOTP secret -->
+                <period>30</period>                    <!-- Optional: OTP validity period in seconds -->
+                <digits>6</digits>                     <!-- Optional: Number of digits in the OTP -->
+                <algorithm>SHA1</algorithm>            <!-- Optional: Hash algorithm: SHA1, SHA256, SHA512 -->
+            </time_based_one_time_password>
+        </my_user>
+    </users>
+</clickhouse>
+
+Parameters:
+
+- secret - (Required) The base32-encoded secret key used to generate TOTP codes.
+- period - Optional. Sets the validity period of each OTP in seconds. Must be a positive number not exceeding 120. Default is 30.
+- digits - Optional. Specifies the number of digits in each OTP. Must be between 4 and 10. Default is 6.
+- algorithm - Optional. Defines the hash algorithm for generating OTPs. Supported values are SHA1, SHA256, and SHA512. Default is SHA1.
+
+Generating a TOTP Secret
+
+To generate a TOTP-compatible secret for use with ClickHouse, run the following command in the terminal:
+
+```bash
+$ base32 -w32 < /dev/urandom | head -1
+```
+
+This command will produce a base32-encoded secret that can be added to the secret field in users.xml.
+
+To enable TOTP for a specific user, replace any existing password-based fields (like `password` or `password_sha256_hex`) with the `time_based_one_time_password` section. Only one authentication method is allowed per user, so TOTP cannot be combined with other methods such as password or LDAP.
+
+The [qrencode](https://linux.die.net/man/1/qrencode) tool can be used to generate a QR code for the TOTP secret.
+
+```bash
+$ qrencode -t ansiutf8 'otpauth://totp/ClickHouse?issuer=ClickHouse&secret=JBSWY3DPEHPK3PXP'
+```
+
+After configuring TOTP for a user, one-time password can be used as a password for a user.
+
+## Enabling TOTP Authentication using SQL {#enabling-totp-auth-using-sql}
+
+When SQL-driven Access Control and Account Management is enabled, TOTP authentication can be set for users via SQL:
+
+```SQL
+CREATE USER my_user IDENTIFIED WITH one_time_password BY 'JBSWY3DPEHPK3PXP';
+```
+
+Values for `period`, `digits`, and `algorithm` will be set to their default values.

programs/server/users.xml

@@ -32,6 +32,24 @@
                  If you want to specify double SHA1, place it in 'password_double_sha1_hex' element.
                  Example: <password_double_sha1_hex>e395796d6546b1b65db9d665cd43f0e858dd4303</password_double_sha1_hex>
 
+                 If you want to specify secret for one time passwords, place it in 'time_based_one_time_password' element.
+                 Example:
+                 <time_based_one_time_password>
+                     <secret>ALLT7V6M3NNSQXMEMPEAUSX77OOUTBSO</secret>
+                     <period>30</period>
+                     <digits>6</digits>
+                     <algorithm>SHA1</algorithm>
+                 </time_based_one_time_password>
+
+                 secret - base32 encoded secret key
+                 period - password validity duration in seconds, default is 30
+                 digits - number of digits in password, default is 6
+                 algorithm - hash algorithm: SHA1/SHA256/SHA512, default is SHA1
+
+                 How to generate secret:
+                 Execute: echo `base32 < /dev/urandom | head -c32`
+                 More info: https://datatracker.ietf.org/doc/html/rfc6238
+
                  If you want to specify a previously defined LDAP server (see 'ldap_servers' in the main config) for authentication,
                   place its name in 'server' element inside 'ldap' element.
                  Example: <ldap><server>my_ldap_server</server></ldap>

src/Access/AccessControl.cpp

@@ -611,7 +611,7 @@ AuthResult AccessControl::authenticate(const Credentials & credentials, const Po
         tryLogCurrentException(getLogger(), "from: " + address.toString() + ", user: " + credentials.getUserName()  + ": Authentication failed", LogsLevel::information);
 
         WriteBufferFromOwnString message;
-        message << credentials.getUserName() << ": Authentication failed: password is incorrect, or there is no user with such name.";
+        message << credentials.getUserName() << ": Authentication failed: password is incorrect, or there is no user with such name";
 
         /// Better exception message for usability.
         /// It is typical when users install ClickHouse, type some password and instantly forget it.

src/Access/Authentication.cpp

@@ -9,6 +9,7 @@
 #include <Common/SSHWrapper.h>
 #include <Common/typeid_cast.h>
 #include <Access/Common/SSLCertificateSubjects.h>
+#include <Access/Common/OneTimePassword.h>
 
 #include "config.h"
 
@@ -136,6 +137,12 @@ namespace
             {
                 return checkPasswordDoubleSHA1(basic_credentials->getPassword(), authentication_method.getPasswordHashBinary());
             }
+            case AuthenticationType::ONE_TIME_PASSWORD:
+            {
+                return checkOneTimePassword(
+                    /* password */ basic_credentials->getPassword(),
+                    /* secret */ authentication_method.getOneTimePassword());
+            }
             case AuthenticationType::LDAP:
             {
                 return external_authenticators.checkLDAPCredentials(authentication_method.getLDAPServerName(), *basic_credentials);

src/Access/AuthenticationData.cpp

@@ -138,6 +138,10 @@ void AuthenticationData::setPassword(const String & password_, bool validate)
             setPasswordHashBinary(Util::encodeDoubleSHA1(password_), validate);
             return;
 
+        case AuthenticationType::ONE_TIME_PASSWORD:
+            setOneTimePassword(password_, OneTimePasswordParams{}, validate);
+            return;
+
         case AuthenticationType::BCRYPT_PASSWORD:
         case AuthenticationType::NO_PASSWORD:
         case AuthenticationType::LDAP:
@@ -154,6 +158,15 @@ void AuthenticationData::setPassword(const String & password_, bool validate)
     throw Exception(ErrorCodes::NOT_IMPLEMENTED, "setPassword(): authentication type {} not supported", toString(type));
 }
 
+void AuthenticationData::setOneTimePassword(const String & password_, OneTimePasswordParams config, bool validate)
+{
+    if (type != AuthenticationType::ONE_TIME_PASSWORD)
+        throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot specify one-time password for authentication type {}", toString(type));
+
+    otp_secret.emplace(password_, config);
+    setPasswordHashBinary(Util::stringToDigest(otp_secret->key), validate);
+}
+
 void AuthenticationData::setPasswordBcrypt(const String & password_, int workfactor_, bool validate)
 {
     if (type != AuthenticationType::BCRYPT_PASSWORD)
@@ -164,9 +177,13 @@ void AuthenticationData::setPasswordBcrypt(const String & password_, int workfac
 
 String AuthenticationData::getPassword() const
 {
-    if (type != AuthenticationType::PLAINTEXT_PASSWORD)
+    if (type == AuthenticationType::PLAINTEXT_PASSWORD)
-        throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot decode the password");
         return String(password_hash.data(), password_hash.data() + password_hash.size());
+
+    if (type == AuthenticationType::ONE_TIME_PASSWORD && otp_secret)
+        return otp_secret->key;
+
+    throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot decode the password for authentication type {}", type);
 }
 
 
@@ -210,6 +227,12 @@ void AuthenticationData::setPasswordHashBinary(const Digest & hash, bool validat
             return;
         }
 
+        case AuthenticationType::ONE_TIME_PASSWORD:
+        {
+            password_hash = hash;
+            return;
+        }
+
         case AuthenticationType::SHA256_PASSWORD:
         {
             if (hash.size() != 32)
@@ -312,6 +335,12 @@ std::shared_ptr<ASTAuthenticationData> AuthenticationData::toAST() const
             node->children.push_back(std::make_shared<ASTLiteral>(getPassword()));
             break;
         }
+        case AuthenticationType::ONE_TIME_PASSWORD:
+        {
+            node->contains_password = true;
+            node->children.push_back(std::make_shared<ASTLiteral>(getPassword()));
+            break;
+        }
         case AuthenticationType::SHA256_PASSWORD:
         {
             node->contains_hash = true;

src/Access/AuthenticationData.h

@@ -3,6 +3,7 @@
 #include <Access/Common/AuthenticationType.h>
 #include <Access/Common/HTTPAuthenticationScheme.h>
 #include <Access/Common/SSLCertificateSubjects.h>
+#include <Access/Common/OneTimePassword.h>
 #include <Common/SSHWrapper.h>
 #include <Interpreters/Context_fwd.h>
 #include <Parsers/Access/ASTAuthenticationData.h>
@@ -36,6 +37,9 @@ public:
     /// Returns the password. Allowed to use only for Type::PLAINTEXT_PASSWORD.
     String getPassword() const;
 
+    void setOneTimePassword(const String & password_, OneTimePasswordParams config, bool validate);
+    const OneTimePasswordSecret & getOneTimePassword() const { return otp_secret.value(); }
+
     /// Sets the password as a string of hexadecimal digits.
     void setPasswordHashHex(const String & hash, bool validate);
     String getPasswordHashHex() const;
@@ -99,6 +103,7 @@ public:
 private:
     AuthenticationType type = AuthenticationType::NO_PASSWORD;
     Digest password_hash;
+    std::optional<OneTimePasswordSecret> otp_secret;
     String ldap_server_name;
     String kerberos_realm;
     SSLCertificateSubjects ssl_certificate_subjects;

src/Access/Common/AuthenticationType.cpp

@@ -42,6 +42,11 @@ const AuthenticationTypeInfo & AuthenticationTypeInfo::get(AuthenticationType ty
             static const auto info = make_info(Keyword::DOUBLE_SHA1_PASSWORD, true);
             return info;
         }
+        case AuthenticationType::ONE_TIME_PASSWORD:
+        {
+            static const auto info = make_info(Keyword::ONE_TIME_PASSWORD, true);
+            return info;
+        }
         case AuthenticationType::LDAP:
         {
             static const auto info = make_info(Keyword::LDAP);

src/Access/Common/AuthenticationType.h

@@ -21,6 +21,10 @@ enum class AuthenticationType : uint8_t
     /// This kind of hash is used by the `mysql_native_password` authentication plugin.
     DOUBLE_SHA1_PASSWORD,
 
+    /// A secret is stored instead of a password
+    /// Users are authenticated using time-based one-time passwords
+    ONE_TIME_PASSWORD,
+
     /// Password is checked by a [remote] LDAP server. Connection will be made at each authentication attempt.
     LDAP,
 

src/Access/Common/CMakeLists.txt

@@ -3,3 +3,7 @@ include("${ClickHouse_SOURCE_DIR}/cmake/dbms_glob_sources.cmake")
 add_headers_and_sources(clickhouse_common_access .)
 add_library(clickhouse_common_access ${clickhouse_common_access_headers} ${clickhouse_common_access_sources})
 target_link_libraries(clickhouse_common_access PUBLIC clickhouse_common_io)
+
+if (TARGET ch_contrib::libcotp)
+    target_link_libraries (clickhouse_common_access PRIVATE ch_contrib::libcotp)
+endif()

src/Access/Common/OneTimePassword.cpp

@@ -0,0 +1,161 @@
+#include <Access/Common/OneTimePassword.h>
+#include <Common/Exception.h>
+#include <Common/ErrorCodes.h>
+#include <Common/logger_useful.h>
+#include <fmt/format.h>
+#include <Poco/String.h>
+
+#include "config.h"
+
+#if USE_SSL
+
+#include <cotp.h>
+
+constexpr int TOTP_SHA512 = SHA512;
+constexpr int TOTP_SHA256 = SHA256;
+constexpr int TOTP_SHA1 = SHA1;
+#undef SHA512
+#undef SHA256
+#undef SHA1
+
+#endif
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int BAD_ARGUMENTS;
+    extern const int LOGICAL_ERROR;
+    extern const int SUPPORT_IS_DISABLED;
+}
+
+/// Checks if the secret contains only valid base32 characters.
+/// The secret may contain spaces, which are ignored and lower-case characters, which are converted to upper-case.
+String normalizeOneTimePasswordSecret(const String & secret)
+{
+    static const UInt8 b32_alphabet[] = u8"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+    static const UInt8 b32_lower_alphabet[] = u8"abcdefghijklmnopqrstuvwxyz";
+
+    constexpr static UInt8 CHAR_IS_VALID = 1;
+    constexpr static UInt8 CHAR_IS_LOWER = 2;
+    std::array<UInt8, 128> table = {};
+    for (const auto * p = b32_alphabet; *p; p++)
+        table[*p] = CHAR_IS_VALID;
+    for (const auto * p = b32_lower_alphabet; *p; p++)
+        table[*p] = CHAR_IS_LOWER;
+
+    String result = secret;
+    size_t i = 0;
+    size_t n = 0;
+    for (; i < secret.size(); ++i)
+    {
+        if (secret[i] == ' ' || secret[i] == '=')
+            continue;
+        size_t idx = static_cast<UInt8>(secret[i]);
+        if (idx >= table.size() || table[idx] == 0)
+            throw Exception(ErrorCodes::BAD_ARGUMENTS, "Invalid character in base32 secret: '{}'", secret[i]);
+        if (table[idx] == CHAR_IS_VALID)
+            result[n] = secret[i];
+        if (table[idx] == CHAR_IS_LOWER)
+            result[n] = std::toupper(secret[i]);
+        ++n;
+    }
+    result.resize(n);
+
+    if (result.empty())
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Empty secret for one-time password");
+    return result;
+}
+
+static std::string_view toString(OneTimePasswordParams::Algorithm algorithm)
+{
+    switch (algorithm)
+    {
+        case OneTimePasswordParams::Algorithm::SHA1: return "SHA1";
+        case OneTimePasswordParams::Algorithm::SHA256: return "SHA256";
+        case OneTimePasswordParams::Algorithm::SHA512: return "SHA512";
+    }
+    throw Exception(ErrorCodes::LOGICAL_ERROR, "Unknown algorithm for one-time password: {}", static_cast<UInt32>(algorithm));
+}
+
+static OneTimePasswordParams::Algorithm hashingAlgorithmFromString(const String & algorithm_name)
+{
+    for (auto alg : {OneTimePasswordParams::Algorithm::SHA1, OneTimePasswordParams::Algorithm::SHA256, OneTimePasswordParams::Algorithm::SHA512})
+    {
+        if (Poco::toUpper(algorithm_name) == toString(alg))
+            return alg;
+    }
+    throw Exception(ErrorCodes::BAD_ARGUMENTS, "Unknown algorithm for one-time password: '{}'", algorithm_name);
+}
+
+OneTimePasswordParams::OneTimePasswordParams(Int32 num_digits_, Int32 period_, const String & algorithm_name_)
+{
+    if (num_digits_)
+        num_digits = num_digits_;
+    if (period_)
+        period = period_;
+    if (!algorithm_name_.empty())
+        algorithm = hashingAlgorithmFromString(algorithm_name_);
+
+    if (num_digits < 4 || 10 < num_digits)
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Invalid number of digits for one-time password: {}", num_digits);
+    if (period <= 0 || 120 < period)
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Invalid period for one-time password: {}", period);
+}
+
+std::string_view OneTimePasswordParams::getAlgorithmName() const { return toString(algorithm); }
+
+
+OneTimePasswordSecret::OneTimePasswordSecret(const String & key_, OneTimePasswordParams params_)
+    : key(normalizeOneTimePasswordSecret(key_)), params(params_)
+{
+}
+
+String getOneTimePasswordSecretLink(const OneTimePasswordSecret & secret)
+{
+    if (secret.params == OneTimePasswordParams{})
+        return fmt::format("otpauth://totp/ClickHouse?issuer=ClickHouse&secret={}", secret.key);
+
+    return fmt::format("otpauth://totp/ClickHouse?issuer=ClickHouse&secret={}&digits={}&period={}&algorithm={}",
+        secret.key, secret.params.num_digits, secret.params.period, toString(secret.params.algorithm));
+}
+
+struct CStringDeleter { void operator()(char * ptr) const { std::free(ptr); } };
+
+String getOneTimePassword(const String & secret [[ maybe_unused ]], const OneTimePasswordParams & config [[ maybe_unused ]], UInt64 current_time [[ maybe_unused ]])
+{
+#if USE_SSL
+    int sha_algo = config.algorithm == OneTimePasswordParams::Algorithm::SHA512 ? TOTP_SHA512
+                 : config.algorithm == OneTimePasswordParams::Algorithm::SHA256 ? TOTP_SHA256
+                 : TOTP_SHA1;
+
+    cotp_error_t error;
+    auto result = std::unique_ptr<char, CStringDeleter>(get_totp_at(secret.c_str(), current_time, config.num_digits, config.period, sha_algo, &error));
+
+    if (result == nullptr || (error != NO_ERROR && error != VALID))
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Error while retrieving one-time password, code: {}",
+            static_cast<std::underlying_type_t<cotp_error_t>>(error));
+    return String(result.get(), strlen(result.get()));
+#else
+    throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "One-time password support is disabled, because ClickHouse was built without openssl library");
+#endif
+}
+
+
+bool checkOneTimePassword(const String & password, const OneTimePasswordSecret & secret)
+{
+    if (password.size() != static_cast<size_t>(secret.params.num_digits)
+     || !std::all_of(password.begin(), password.end(), isdigit))
+        return false;
+
+    auto current_time = static_cast<UInt64>(std::time(nullptr));
+    for (int delta : {0, -1, 1})
+    {
+        if (password == getOneTimePassword(secret.key, secret.params, current_time + delta * secret.params.period))
+            return true;
+    }
+    return false;
+}
+
+}

src/Access/Common/OneTimePassword.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <base/types.h>
+
+namespace DB
+{
+
+struct OneTimePasswordParams
+{
+    Int32 num_digits = 6;
+    Int32 period = 30;
+
+    enum class Algorithm : UInt8
+    {
+        SHA1,
+        SHA256,
+        SHA512,
+    } algorithm = Algorithm::SHA1;
+
+    explicit OneTimePasswordParams(Int32 num_digits_ = {}, Int32 period_ = {}, const String & algorithm_name_ = {});
+
+    bool operator==(const OneTimePasswordParams &) const = default;
+
+    std::string_view getAlgorithmName() const;
+};
+
+struct OneTimePasswordSecret
+{
+    String key;
+    OneTimePasswordParams params;
+
+    explicit OneTimePasswordSecret(
+        const String & key_,
+        OneTimePasswordParams params_ = OneTimePasswordParams{});
+};
+
+String getOneTimePasswordSecretLink(const OneTimePasswordSecret & secret);
+bool checkOneTimePassword(const String & password, const OneTimePasswordSecret & secret);
+
+}

src/Access/UsersConfigAccessStorage.cpp

@@ -7,6 +7,8 @@
 #include <Access/SettingsProfile.h>
 #include <Access/AccessControl.h>
 #include <Access/resolveSetting.h>
+#include <Access/Common/AuthenticationType.h>
+#include <Access/Common/OneTimePassword.h>
 #include <Access/AccessChangesNotifier.h>
 #include <Dictionaries/IDictionary.h>
 #include <Common/Config/ConfigReloader.h>
@@ -127,6 +129,7 @@ namespace
         String user_config = "users." + user_name;
         bool has_no_password = config.has(user_config + ".no_password");
         bool has_password_plaintext = config.has(user_config + ".password");
+        bool has_otp_secret = config.has(user_config + ".time_based_one_time_password");
         bool has_password_sha256_hex = config.has(user_config + ".password_sha256_hex");
         bool has_password_double_sha1_hex = config.has(user_config + ".password_double_sha1_hex");
         bool has_ldap = config.has(user_config + ".ldap");
@@ -142,11 +145,11 @@ namespace
         bool has_http_auth = config.has(http_auth_config);
 
         size_t num_password_fields = has_no_password + has_password_plaintext + has_password_sha256_hex + has_password_double_sha1_hex
-            + has_ldap + has_kerberos + has_certificates + has_ssh_keys + has_http_auth;
+            + has_ldap + has_kerberos + has_certificates + has_ssh_keys + has_http_auth + has_otp_secret;
 
         if (num_password_fields > 1)
             throw Exception(ErrorCodes::BAD_ARGUMENTS, "More than one field of 'password', 'password_sha256_hex', "
-                            "'password_double_sha1_hex', 'no_password', 'ldap', 'kerberos', 'ssl_certificates', 'ssh_keys', "
+                            "'password_double_sha1_hex', 'no_password', 'time_based_one_time_password', 'ldap', 'kerberos', 'ssl_certificates', 'ssh_keys', "
                             "'http_authentication' are used to specify authentication info for user {}. "
                             "Must be only one of them.", user_name);
 
@@ -170,6 +173,15 @@ namespace
             user->authentication_methods.emplace_back(AuthenticationType::DOUBLE_SHA1_PASSWORD);
             user->authentication_methods.back().setPasswordHashHex(config.getString(user_config + ".password_double_sha1_hex"), validate);
         }
+        else if (has_otp_secret)
+        {
+            String secret = config.getString(user_config + ".time_based_one_time_password.secret", "");
+            OneTimePasswordParams otp_config(
+                config.getInt(user_config + ".time_based_one_time_password.digits", {}),
+                config.getInt(user_config + ".time_based_one_time_password.period", {}),
+                config.getString(user_config + ".time_based_one_time_password.algorithm", {}));
+            user->authentication_methods.emplace_back(AuthenticationType::ONE_TIME_PASSWORD).setOneTimePassword(secret, otp_config, validate);
+        }
         else if (has_ldap)
         {
             bool has_ldap_server = config.has(user_config + ".ldap.server");
@@ -269,7 +281,7 @@ namespace
         }
         else
         {
-            user->authentication_methods.emplace_back();
+            user->authentication_methods.emplace_back(AuthenticationType::NO_PASSWORD);
         }
 
         for (const auto & authentication_method : user->authentication_methods)

src/Interpreters/SessionLog.cpp

@@ -85,6 +85,7 @@ ColumnsDescription SessionLogElement::getColumnsDescription()
             AUTH_TYPE_NAME_AND_VALUE(AuthType::PLAINTEXT_PASSWORD),
             AUTH_TYPE_NAME_AND_VALUE(AuthType::SHA256_PASSWORD),
             AUTH_TYPE_NAME_AND_VALUE(AuthType::DOUBLE_SHA1_PASSWORD),
+            AUTH_TYPE_NAME_AND_VALUE(AuthType::ONE_TIME_PASSWORD),
             AUTH_TYPE_NAME_AND_VALUE(AuthType::LDAP),
             AUTH_TYPE_NAME_AND_VALUE(AuthType::JWT),
             AUTH_TYPE_NAME_AND_VALUE(AuthType::KERBEROS),
@@ -94,7 +95,7 @@ ColumnsDescription SessionLogElement::getColumnsDescription()
             AUTH_TYPE_NAME_AND_VALUE(AuthType::HTTP),
         });
 #undef AUTH_TYPE_NAME_AND_VALUE
-    static_assert(static_cast<int>(AuthenticationType::MAX) == 11);
+    static_assert(static_cast<int>(AuthenticationType::MAX) == 12);
 
     auto interface_type_column = std::make_shared<DataTypeEnum8>(
         DataTypeEnum8::Values

src/Parsers/Access/ASTAuthenticationData.cpp

@@ -104,6 +104,12 @@ void ASTAuthenticationData::formatImpl(const FormatSettings & settings, FormatSt
                 password = true;
                 break;
             }
+            case AuthenticationType::ONE_TIME_PASSWORD:
+            {
+                prefix = "BY";
+                password = true;
+                break;
+            }
             case AuthenticationType::JWT:
             {
                 prefix = "CLAIMS";

src/Parsers/CommonParsers.h

@@ -563,6 +563,7 @@ namespace DB
     MR_MACROS(DOUBLE_SHA1_PASSWORD, "DOUBLE_SHA1_PASSWORD") \
     MR_MACROS(IS_OBJECT_ID, "IS_OBJECT_ID") \
     MR_MACROS(NO_PASSWORD, "NO_PASSWORD") \
+    MR_MACROS(ONE_TIME_PASSWORD, "ONE_TIME_PASSWORD") \
     MR_MACROS(PART_MOVE_TO_SHARD, "PART_MOVE_TO_SHARD") \
     MR_MACROS(PLAINTEXT_PASSWORD, "PLAINTEXT_PASSWORD") \
     MR_MACROS(SHA256_HASH, "SHA256_HASH") \

src/Storages/System/StorageSystemUsers.cpp

@@ -149,6 +149,16 @@ void StorageSystemUsers::fillData(MutableColumns & res_columns, ContextPtr conte
             {
                 auth_params_json.set("realm", auth_data.getKerberosRealm());
             }
+            else if (auth_data.getType() == AuthenticationType::ONE_TIME_PASSWORD)
+            {
+                const auto & secret = auth_data.getOneTimePassword();
+                if (secret.params != OneTimePasswordParams{})
+                {
+                    auth_params_json.set("algorithm", toString(secret.params.algorithm));
+                    auth_params_json.set("num_digits", toString(secret.params.num_digits));
+                    auth_params_json.set("period", toString(secret.params.period));
+                }
+            }
             else if (auth_data.getType() == AuthenticationType::SSL_CERTIFICATE)
             {
                 Poco::JSON::Array::Ptr common_names = new Poco::JSON::Array();

tests/fuzz/dictionaries/keywords.dict

@@ -341,14 +341,15 @@
 "NULL"
 "NULLS"
 "OFFSET"
-"ON"
 "ON DELETE"
 "ON UPDATE"
 "ON VOLUME"
+"ON"
+"ONE_TIME_PASSWORD"
 "ONLY"
 "OPTIMIZE TABLE"
-"OR"
 "OR REPLACE"
+"OR"
 "ORDER BY"
 "OUTER"
 "OVER"

tests/integration/test_totp_auth/test_totp.py

@@ -0,0 +1,150 @@
+import base64
+import hashlib
+import hmac
+import os
+import random
+import struct
+import time
+from fnmatch import fnmatch
+
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+
+SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
+TOTP_SECRET = base64.b32encode(random.randbytes(random.randint(3, 64))).decode()
+
+cluster = ClickHouseCluster(__file__)
+node = cluster.add_instance(
+    "node",
+    user_configs=["config/users.xml"],
+)
+
+
+def create_config(totp_secret):
+    config = f"""
+<clickhouse>
+    <profiles>
+        <default>
+        </default>
+    </profiles>
+    <users>
+        <totuser>
+            <time_based_one_time_password>
+                <secret>{totp_secret}</secret>
+                <period>10</period>
+                <digits>9</digits>
+                <algorithm>SHA256</algorithm>
+            </time_based_one_time_password>
+
+            <access_management>1</access_management>
+            <networks replace="replace">
+                <ip>::/0</ip>
+            </networks>
+            <profile>default</profile>
+            <quota>default</quota>
+        </totuser>
+    </users>
+</clickhouse>
+""".lstrip()
+
+    with open(os.path.join(SCRIPT_DIR, "config/users.xml"), "w") as f:
+        f.write(config)
+
+
+@pytest.fixture(scope="module")
+def started_cluster():
+    try:
+        create_config(TOTP_SECRET)
+        cluster.start()
+        yield cluster
+    finally:
+        cluster.shutdown()
+
+
+def generate_totp(
+    secret, interval=30, digits=6, sha_version=hashlib.sha1, timepoint=None
+):
+    key = base64.b32decode(secret, casefold=True)
+    time_step = int(timepoint or time.time() / interval)
+    msg = struct.pack(">Q", time_step)
+    hmac_hash = hmac.new(key, msg, sha_version).digest()
+    offset = hmac_hash[-1] & 0x0F
+    binary_code = struct.unpack(">I", hmac_hash[offset : offset + 4])[0] & 0x7FFFFFFF
+    otp = binary_code % (10**digits)
+    return f"{otp:0{digits}d}"
+
+
+def test_one_time_password(started_cluster):
+    query_text = "SELECT currentUser() || toString(42)"
+    totuser_secret = {
+        "secret": TOTP_SECRET,
+        "interval": 10,
+        "digits": 9,
+        "sha_version": hashlib.sha256,
+    }
+
+    old_password = generate_totp(
+        **totuser_secret, timepoint=time.time() - 3 * totuser_secret["interval"]
+    )
+    assert "AUTHENTICATION_FAILED" in node.query_and_get_error(
+        query_text, user="totuser", password=old_password
+    )
+
+    assert "totuser42\n" == node.query(
+        query_text, user="totuser", password=generate_totp(**totuser_secret)
+    )
+
+    assert "totuser42\n" == node.query(
+        query_text, user="totuser", password=generate_totp(**totuser_secret)
+    )
+
+    assert "CREATE USER totuser IDENTIFIED WITH one_time_password" in node.query(
+        "SHOW CREATE USER totuser",
+        user="totuser",
+        password=generate_totp(**totuser_secret),
+    )
+
+    for bad_secret, error_message in [
+        ("i11egalbase32", "Invalid character in*secret"),
+        ("abc$d", "Invalid character in*secret"),
+        ("   ", "Empty secret"),
+        ("   =", "Empty secret"),
+        ("", "Empty secret"),
+    ]:
+        err_resp = node.query_and_get_error(
+            f"CREATE USER user2 IDENTIFIED WITH one_time_password BY '{bad_secret}'",
+            user="totuser",
+            password=generate_totp(**totuser_secret),
+        )
+        assert fnmatch(err_resp, f"*{error_message}*BAD_ARGUMENTS*"), err_resp
+
+    # lowercase secret with spaces is allowed
+    node.query(
+        "CREATE USER user2 IDENTIFIED WITH one_time_password BY 'inwg sy3l jbxx k43f biaa'",
+        user="totuser",
+        password=generate_totp(**totuser_secret),
+    )
+
+    assert "user242\n" == node.query(
+        query_text,
+        user="user2",
+        password=generate_totp("INWGSY3LJBXXK43FBIAA===="),
+    )
+
+    resp = node.query(
+        """
+            SELECT
+                name,
+                auth_type[1],
+                JSONExtractString(auth_params[1], 'algorithm'),
+                JSONExtractString(auth_params[1], 'num_digits'),
+                JSONExtractString(auth_params[1], 'period')
+            FROM system.users WHERE name IN ('totuser', 'user2')
+            ORDER BY 1
+            """,
+        user="totuser",
+        password=generate_totp(**totuser_secret),
+    ).splitlines()
+    assert resp[0].startswith("totuser\tone_time_password\tSHA256\t9\t10"), resp
+    assert resp[1].startswith("user2\tone_time_password"), resp

tests/queries/0_stateless/02117_show_create_table_system.reference

@@ -1150,7 +1150,7 @@ CREATE TABLE system.users
     `name` String,
     `id` UUID,
     `storage` String,
-    `auth_type` Array(Enum8('no_password' = 0, 'plaintext_password' = 1, 'sha256_password' = 2, 'double_sha1_password' = 3, 'ldap' = 4, 'kerberos' = 5, 'ssl_certificate' = 6, 'bcrypt_password' = 7, 'ssh_key' = 8, 'http' = 9, 'jwt' = 10)),
+    `auth_type` Array(Enum8('no_password' = 0, 'plaintext_password' = 1, 'sha256_password' = 2, 'double_sha1_password' = 3, 'one_time_password' = 4, 'ldap' = 5, 'kerberos' = 6, 'ssl_certificate' = 7, 'bcrypt_password' = 8, 'ssh_key' = 9, 'http' = 10, 'jwt' = 11)),
     `auth_params` Array(String),
     `host_ip` Array(String),
     `host_names` Array(String),

tests/queries/0_stateless/02550_client_connections_credentials.reference

@@ -16,12 +16,12 @@ user
 MySQL: Authentication failed
 default
 password
-default: Authentication failed: password is incorrect, or there is no user with such name.
+default: Authentication failed: password is incorrect, or there is no user with such name
 default
 history_file
 Cannot create file: /no/such/dir/.history
 root overrides
-foo: Authentication failed: password is incorrect, or there is no user with such name.
+foo: Authentication failed: password is incorrect, or there is no user with such name
 default
 default
-foo: Authentication failed: password is incorrect, or there is no user with such name.
+foo: Authentication failed: password is incorrect, or there is no user with such name

tests/queries/0_stateless/02550_client_connections_credentials.sh

@@ -117,7 +117,7 @@ echo 'user'
 $CLICKHOUSE_CLIENT --config $CONFIG --connection test_user -q 'select currentUser()' |& grep -F -o 'MySQL: Authentication failed'
 $CLICKHOUSE_CLIENT --config $CONFIG --connection test_user --user default -q 'select currentUser()'
 echo 'password'
-$CLICKHOUSE_CLIENT --config $CONFIG --connection test_password -q 'select currentUser()' |& grep -F -o 'default: Authentication failed: password is incorrect, or there is no user with such name.'
+$CLICKHOUSE_CLIENT --config $CONFIG --connection test_password -q 'select currentUser()' |& grep -F -o 'default: Authentication failed: password is incorrect, or there is no user with such name'
 $CLICKHOUSE_CLIENT --config $CONFIG --connection test_password --password "" -q 'select currentUser()'
 echo 'history_file'
 $CLICKHOUSE_CLIENT --progress off --interactive --config $CONFIG --connection test_history_file -q 'select 1' </dev/null |& grep -F -o 'Cannot create file: /no/such/dir/.history'
@@ -126,9 +126,9 @@ $CLICKHOUSE_CLIENT --progress off --interactive --config $CONFIG --connection te
 unset CLICKHOUSE_USER
 unset CLICKHOUSE_PASSWORD
 echo 'root overrides'
-$CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection incorrect_auth -q 'select currentUser()' |& grep -F -o 'foo: Authentication failed: password is incorrect, or there is no user with such name.'
+$CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection incorrect_auth -q 'select currentUser()' |& grep -F -o 'foo: Authentication failed: password is incorrect, or there is no user with such name'
 $CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection incorrect_auth --user "default" --password "" -q 'select currentUser()'
 $CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection default -q 'select currentUser()'
-$CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection default --user foo -q 'select currentUser()' |& grep -F -o 'foo: Authentication failed: password is incorrect, or there is no user with such name.'
+$CLICKHOUSE_CLIENT --config $CONFIG_ROOT_OVERRIDES --connection default --user foo -q 'select currentUser()' |& grep -F -o 'foo: Authentication failed: password is incorrect, or there is no user with such name'
 
 rm -f "${CONFIG:?}"

utils/check-style/aspell-ignore/en/aspell-dict.txt

@@ -1,4 +1,4 @@
-personal_ws-1.1 en 2984
+personal_ws-1.1 en 3156 
 AArch
 ACLs
 ALTERs
@@ -1020,6 +1020,7 @@ TINYINT
 TLSv
 TMAX
 TMIN
+TOTP
 TPCH
 TSDB
 TSVRaw
@@ -1106,7 +1107,6 @@ URLHash
 URLHierarchy
 URLPathHierarchy
 USearch
-USearch
 UTCTimestamp
 UUIDNumToString
 UUIDStringToNum
@@ -2469,6 +2469,7 @@ punycodeEncode
 pushdown
 pwrite
 py
+qrencode
 qryn
 quantile
 quantileBFloat
@@ -2977,6 +2978,7 @@ topLevelDomain
 topLevelDomainRFC
 topk
 topkweighted
+totp
 tpcds
 tpch
 transactionID