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Remember nonce to prevent replay attacks
This commit is contained in:
Omar Roth
parent
c7f0a6f2e1
commit
d185ba84bf
13
config/sql/nonces.sql
Normal file
13
config/sql/nonces.sql
Normal file
@ -0,0 +1,13 @@
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-- Table: public.nonces
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-- DROP TABLE public.nonces;
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CREATE TABLE public.nonces
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(
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nonce text
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)
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WITH (
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OIDS=FALSE
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);
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GRANT ALL ON TABLE public.nonces TO kemal;
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1
setup.sh
1
setup.sh
@ -7,3 +7,4 @@ psql invidious < config/sql/channels.sql
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psql invidious < config/sql/videos.sql
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psql invidious < config/sql/channel_videos.sql
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psql invidious < config/sql/users.sql
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psql invidious < config/sql/nonces.sql
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@ -142,7 +142,7 @@ before_all do |env|
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user = PG_DB.query_one?("SELECT * FROM users WHERE $1 = ANY(id)", sid, as: User)
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if user
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challenge, token = create_response(user.email, "sign_out", HMAC_KEY, 1.week)
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challenge, token = create_response(user.email, "sign_out", HMAC_KEY, PG_DB, 1.week)
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env.set "challenge", challenge
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env.set "token", token
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@ -155,7 +155,7 @@ before_all do |env|
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client = make_client(YT_URL)
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user = get_user(sid, client, headers, PG_DB, false)
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challenge, token = create_response(user.email, "sign_out", HMAC_KEY, 1.week)
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challenge, token = create_response(user.email, "sign_out", HMAC_KEY, PG_DB, 1.week)
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env.set "challenge", challenge
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env.set "token", token
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@ -624,7 +624,7 @@ get "/login" do |env|
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account_type ||= "invidious"
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if account_type == "invidious"
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captcha = generate_captcha(HMAC_KEY)
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captcha = generate_captcha(HMAC_KEY, PG_DB)
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end
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tfa = env.params.query["tfa"]?
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@ -815,9 +815,26 @@ post "/login" do |env|
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next templated "error"
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end
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elsif account_type == "invidious"
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challenge_response = env.params.body["challenge_response"]?
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answer = env.params.body["answer"]?
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if !answer
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error_message = "CAPTCHA is a required field"
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next templated "error"
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end
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answer = answer.lstrip('0')
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answer = OpenSSL::HMAC.hexdigest(:sha256, HMAC_KEY, answer)
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challenge = env.params.body["challenge"]?
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token = env.params.body["token"]?
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begin
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validate_response(challenge, token, answer, "sign_in", HMAC_KEY, PG_DB)
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rescue ex
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error_message = ex.message
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next templated "error"
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end
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action = env.params.body["action"]?
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action ||= "signin"
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@ -831,18 +848,6 @@ post "/login" do |env|
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next templated "error"
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end
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if !challenge_response || !token
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error_message = "CAPTCHA is a required field"
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next templated "error"
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end
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challenge_response = challenge_response.lstrip('0')
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if OpenSSL::HMAC.digest(:sha256, HMAC_KEY, challenge_response) == Base64.decode(token)
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else
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error_message = "Invalid CAPTCHA response"
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next templated "error"
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end
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if action == "signin"
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user = PG_DB.query_one?("SELECT * FROM users WHERE LOWER(email) = LOWER($1) AND password IS NOT NULL", email, as: User)
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@ -940,7 +945,7 @@ get "/signout" do |env|
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token = env.params.query["token"]?
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begin
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validate_response(challenge, token, user.email, "sign_out", HMAC_KEY)
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validate_response(challenge, token, user.email, "sign_out", HMAC_KEY, PG_DB)
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rescue ex
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error_message = ex.message
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next templated "error"
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@ -1461,7 +1466,7 @@ get "/delete_account" do |env|
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if user
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user = user.as(User)
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challenge, token = create_response(user.email, "delete_account", HMAC_KEY)
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challenge, token = create_response(user.email, "delete_account", HMAC_KEY, PG_DB)
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templated "delete_account"
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else
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@ -1480,7 +1485,7 @@ post "/delete_account" do |env|
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token = env.params.body["token"]?
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begin
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validate_response(challenge, token, user.email, "delete_account", HMAC_KEY)
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validate_response(challenge, token, user.email, "delete_account", HMAC_KEY, PG_DB)
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rescue ex
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error_message = ex.message
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next templated "error"
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@ -1506,7 +1511,7 @@ get "/clear_watch_history" do |env|
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if user
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user = user.as(User)
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challenge, token = create_response(user.email, "clear_watch_history", HMAC_KEY)
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challenge, token = create_response(user.email, "clear_watch_history", HMAC_KEY, PG_DB)
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templated "clear_watch_history"
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else
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@ -1525,7 +1530,7 @@ post "/clear_watch_history" do |env|
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token = env.params.body["token"]?
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begin
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validate_response(challenge, token, user.email, "clear_watch_history", HMAC_KEY)
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validate_response(challenge, token, user.email, "clear_watch_history", HMAC_KEY, PG_DB)
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rescue ex
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error_message = ex.message
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next templated "error"
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@ -130,55 +130,6 @@ def login_req(login_form, f_req)
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return HTTP::Params.encode(data)
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end
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def generate_captcha(key)
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minute = Random::Secure.rand(12)
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minute_angle = minute * 30
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minute = minute * 5
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hour = Random::Secure.rand(12)
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hour_angle = hour * 30 + minute_angle.to_f / 12
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if hour == 0
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hour = 12
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end
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clock_svg = <<-END_SVG
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<svg viewBox="0 0 100 100" width="200px">
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<circle cx="50" cy="50" r="45" fill="#eee" stroke="black" stroke-width="2"></circle>
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<text x="69" y="20.091" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 1</text>
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<text x="82.909" y="34" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 2</text>
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<text x="88" y="53" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 3</text>
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<text x="82.909" y="72" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 4</text>
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<text x="69" y="85.909" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 5</text>
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<text x="50" y="91" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 6</text>
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<text x="31" y="85.909" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 7</text>
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<text x="17.091" y="72" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 8</text>
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<text x="12" y="53" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 9</text>
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<text x="17.091" y="34" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">10</text>
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<text x="31" y="20.091" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">11</text>
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<text x="50" y="15" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">12</text>
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<circle cx="50" cy="50" r="3" fill="black"></circle>
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<line id="minute" transform="rotate(#{minute_angle}, 50, 50)" x1="50" y1="50" x2="50" y2="16" fill="black" stroke="black" stroke-width="2"></line>
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<line id="hour" transform="rotate(#{hour_angle}, 50, 50)" x1="50" y1="50" x2="50" y2="24" fill="black" stroke="black" stroke-width="2"></line>
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</svg>
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END_SVG
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challenge = ""
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convert = Process.run(%(convert -density 1200 -resize 400x400 -background none svg:- png:-), shell: true,
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input: IO::Memory.new(clock_svg), output: Process::Redirect::Pipe) do |proc|
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challenge = proc.output.gets_to_end
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challenge = Base64.strict_encode(challenge)
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challenge = "data:image/png;base64,#{challenge}"
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end
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answer = "#{hour}:#{minute.to_s.rjust(2, '0')}"
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token = OpenSSL::HMAC.digest(:sha256, key, answer)
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token = Base64.urlsafe_encode(token)
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return {challenge: challenge, token: token}
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end
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def html_to_content(description_html)
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if !description_html
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description = ""
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@ -200,9 +200,10 @@ def create_user(sid, email, password)
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return user
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end
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def create_response(user_id, operation, key, expire = 6.hours)
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def create_response(user_id, operation, key, db, expire = 6.hours)
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expire = Time.now + expire
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nonce = Random::Secure.hex(4)
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nonce = Random::Secure.hex(16)
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db.exec("INSERT INTO nonces VALUES ($1) ON CONFLICT DO NOTHING", nonce)
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challenge = "#{expire.to_unix}-#{nonce}-#{user_id}-#{operation}"
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token = OpenSSL::HMAC.digest(:sha256, key, challenge)
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@ -213,7 +214,7 @@ def create_response(user_id, operation, key, expire = 6.hours)
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return challenge, token
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end
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def validate_response(challenge, token, user_id, operation, key)
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def validate_response(challenge, token, user_id, operation, key, db)
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if !challenge
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raise "Hidden field \"challenge\" is a required field"
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end
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@ -235,6 +236,12 @@ def validate_response(challenge, token, user_id, operation, key)
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challenge = OpenSSL::HMAC.digest(:sha256, HMAC_KEY, challenge)
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challenge = Base64.urlsafe_encode(challenge)
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if db.query_one?("SELECT EXISTS (SELECT true FROM nonces WHERE nonce = $1)", nonce, as: Bool)
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db.exec("DELETE FROM nonces * WHERE nonce = $1", nonce)
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else
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raise "Invalid token"
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end
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if challenge != token
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raise "Invalid token"
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end
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@ -251,3 +258,53 @@ def validate_response(challenge, token, user_id, operation, key)
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raise "Token is expired, please try again"
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end
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end
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def generate_captcha(key, db)
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minute = Random::Secure.rand(12)
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minute_angle = minute * 30
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minute = minute * 5
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hour = Random::Secure.rand(12)
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hour_angle = hour * 30 + minute_angle.to_f / 12
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if hour == 0
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hour = 12
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end
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clock_svg = <<-END_SVG
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<svg viewBox="0 0 100 100" width="200px">
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<circle cx="50" cy="50" r="45" fill="#eee" stroke="black" stroke-width="2"></circle>
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<text x="69" y="20.091" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 1</text>
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<text x="82.909" y="34" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 2</text>
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<text x="88" y="53" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 3</text>
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<text x="82.909" y="72" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 4</text>
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<text x="69" y="85.909" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 5</text>
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<text x="50" y="91" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 6</text>
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<text x="31" y="85.909" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 7</text>
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<text x="17.091" y="72" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 8</text>
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<text x="12" y="53" text-anchor="middle" fill="black" font-family="Arial" font-size="10px"> 9</text>
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<text x="17.091" y="34" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">10</text>
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<text x="31" y="20.091" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">11</text>
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<text x="50" y="15" text-anchor="middle" fill="black" font-family="Arial" font-size="10px">12</text>
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<circle cx="50" cy="50" r="3" fill="black"></circle>
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<line id="minute" transform="rotate(#{minute_angle}, 50, 50)" x1="50" y1="50" x2="50" y2="16" fill="black" stroke="black" stroke-width="2"></line>
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<line id="hour" transform="rotate(#{hour_angle}, 50, 50)" x1="50" y1="50" x2="50" y2="24" fill="black" stroke="black" stroke-width="2"></line>
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</svg>
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END_SVG
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image = ""
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convert = Process.run(%(convert -density 1200 -resize 400x400 -background none svg:- png:-), shell: true,
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input: IO::Memory.new(clock_svg), output: Process::Redirect::Pipe) do |proc|
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image = proc.output.gets_to_end
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image = Base64.strict_encode(image)
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image = "data:image/png;base64,#{image}"
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end
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answer = "#{hour}:#{minute.to_s.rjust(2, '0')}"
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answer = OpenSSL::HMAC.hexdigest(:sha256, key, answer)
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challenge, token = create_response(answer, "sign_in", key, db)
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return {image: image, challenge: challenge, token: token}
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end
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@ -24,10 +24,11 @@
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<label for="password">Password:</label>
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<input required class="pure-input-1" name="password" type="password" placeholder="Password">
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<img style="width:100%" src='<%= captcha.not_nil![:challenge] %>'/>
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<img style="width:100%" src='<%= captcha.not_nil![:image] %>'/>
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<input type="hidden" name="token" value="<%= captcha.not_nil![:token] %>">
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<label for="challenge_response">Time (h:mm):</label>
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<input required type="text" name="challenge_response" type="text>" placeholder="hh:mm">
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<input type="hidden" name="challenge" value="<%= captcha.not_nil![:challenge] %>">
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<label for="answer">Time (h:mm):</label>
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<input required type="text" name="answer" type="text>" placeholder="hh:mm">
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<button type="submit" name="action" value="signin" class="pure-button pure-button-primary">Sign In</button>
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<button type="submit" name="action" value="register" class="pure-button pure-button-primary">Register</button>
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