feat(sso): add support for login with SAML/SSO

apps/sim/app/(auth)/components/social-login-buttons.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useEffect, useState } from 'react'
+import { type ReactNode, useEffect, useState } from 'react'
 import { GithubIcon, GoogleIcon } from '@/components/icons'
 import { Button } from '@/components/ui/button'
 import { client } from '@/lib/auth-client'
@@ -11,13 +11,15 @@ interface SocialLoginButtonsProps {
   googleAvailable: boolean
   callbackURL?: string
   isProduction: boolean
+  children?: ReactNode
 }
 
 export function SocialLoginButtons({
   githubAvailable,
   googleAvailable,
   callbackURL = '/workspace',
   isProduction,
+  children,
 }: SocialLoginButtonsProps) {
   const [isGithubLoading, setIsGithubLoading] = useState(false)
   const [isGoogleLoading, setIsGoogleLoading] = useState(false)
@@ -103,14 +105,15 @@ export function SocialLoginButtons({
 
   const hasAnyOAuthProvider = githubAvailable || googleAvailable
 
-  if (!hasAnyOAuthProvider) {
+  if (!hasAnyOAuthProvider && !children) {
     return null
   }
 
   return (
     <div className={`${inter.className} grid gap-3 font-light`}>
       {googleAvailable && googleButton}
       {githubAvailable && githubButton}
+      {children}
     </div>
   )
 }

apps/sim/app/(auth)/components/sso-login-button.tsx

@@ -0,0 +1,53 @@
+'use client'
+
+import { useRouter } from 'next/navigation'
+import { Button } from '@/components/ui/button'
+import { env, isTruthy } from '@/lib/env'
+import { cn } from '@/lib/utils'
+
+interface SSOLoginButtonProps {
+  callbackURL?: string
+  className?: string
+  // Visual variant for button styling and placement contexts
+  // - 'primary' matches the main auth action button style
+  // - 'outline' matches social provider buttons
+  variant?: 'primary' | 'outline'
+  // Optional class used when variant is primary to match brand/gradient
+  primaryClassName?: string
+}
+
+export function SSOLoginButton({
+  callbackURL,
+  className,
+  variant = 'outline',
+  primaryClassName,
+}: SSOLoginButtonProps) {
+  const router = useRouter()
+
+  if (!isTruthy(env.NEXT_PUBLIC_SSO_ENABLED)) {
+    return null
+  }
+
+  const handleSSOClick = () => {
+    const ssoUrl = `/sso${callbackURL ? `?callbackUrl=${encodeURIComponent(callbackURL)}` : ''}`
+    router.push(ssoUrl)
+  }
+
+  const primaryBtnClasses = cn(
+    primaryClassName || 'auth-button-gradient',
+    'flex w-full items-center justify-center gap-2 rounded-[10px] border font-medium text-[15px] text-white transition-all duration-200'
+  )
+
+  const outlineBtnClasses = cn('w-full rounded-[10px] shadow-sm hover:bg-gray-50')
+
+  return (
+    <Button
+      type='button'
+      onClick={handleSSOClick}
+      variant={variant === 'outline' ? 'outline' : undefined}
+      className={cn(variant === 'outline' ? outlineBtnClasses : primaryBtnClasses, className)}
+    >
+      Sign in with SSO
+    </Button>
+  )
+}

apps/sim/app/(auth)/login/login-form.tsx

@@ -16,9 +16,11 @@ import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import { client } from '@/lib/auth-client'
 import { quickValidateEmail } from '@/lib/email/validation'
+import { env, isFalsy, isTruthy } from '@/lib/env'
 import { createLogger } from '@/lib/logs/console/logger'
 import { cn } from '@/lib/utils'
 import { SocialLoginButtons } from '@/app/(auth)/components/social-login-buttons'
+import { SSOLoginButton } from '@/app/(auth)/components/sso-login-button'
 import { inter } from '@/app/fonts/inter'
 import { soehne } from '@/app/fonts/soehne/soehne'
 
@@ -365,6 +367,14 @@ export default function LoginPage({
     }
   }
 
+  const ssoEnabled = isTruthy(env.NEXT_PUBLIC_SSO_ENABLED)
+  const emailEnabled = !isFalsy(env.NEXT_PUBLIC_EMAIL_PASSWORD_SIGNUP_ENABLED)
+  const hasSocial = githubAvailable || googleAvailable
+  const hasOnlySSO = ssoEnabled && !emailEnabled && !hasSocial
+  const showTopSSO = hasOnlySSO
+  const showBottomSection = hasSocial || (ssoEnabled && !hasOnlySSO)
+  const showDivider = (emailEnabled || showTopSSO) && showBottomSection
+
   return (
     <>
       <div className='space-y-1 text-center'>
@@ -376,96 +386,111 @@ export default function LoginPage({
         </p>
       </div>
 
-      <form onSubmit={onSubmit} className={`${inter.className} mt-8 space-y-8`}>
-        <div className='space-y-6'>
-          <div className='space-y-2'>
-            <div className='flex items-center justify-between'>
-              <Label htmlFor='email'>Email</Label>
-            </div>
-            <Input
-              id='email'
-              name='email'
-              placeholder='Enter your email'
-              required
-              autoCapitalize='none'
-              autoComplete='email'
-              autoCorrect='off'
-              value={email}
-              onChange={handleEmailChange}
-              className={cn(
-                'rounded-[10px] shadow-sm transition-colors focus:border-gray-400 focus:ring-2 focus:ring-gray-100',
-                showEmailValidationError &&
-                  emailErrors.length > 0 &&
-                  'border-red-500 focus:border-red-500 focus:ring-red-100 focus-visible:ring-red-500'
-              )}
-            />
-            {showEmailValidationError && emailErrors.length > 0 && (
-              <div className='mt-1 space-y-1 text-red-400 text-xs'>
-                {emailErrors.map((error, index) => (
-                  <p key={index}>{error}</p>
-                ))}
+      {/* SSO Login Button (primary top-only when it is the only method) */}
+      {showTopSSO && (
+        <div className={`${inter.className} mt-8`}>
+          <SSOLoginButton
+            callbackURL={callbackUrl}
+            variant='primary'
+            primaryClassName={buttonClass}
+          />
+        </div>
+      )}
+
+      {/* Email/Password Form - show unless explicitly disabled */}
+      {!isFalsy(env.NEXT_PUBLIC_EMAIL_PASSWORD_SIGNUP_ENABLED) && (
+        <form onSubmit={onSubmit} className={`${inter.className} mt-8 space-y-8`}>
+          <div className='space-y-6'>
+            <div className='space-y-2'>
+              <div className='flex items-center justify-between'>
+                <Label htmlFor='email'>Email</Label>
               </div>
-            )}
-          </div>
-          <div className='space-y-2'>
-            <div className='flex items-center justify-between'>
-              <Label htmlFor='password'>Password</Label>
-              <button
-                type='button'
-                onClick={() => setForgotPasswordOpen(true)}
-                className='font-medium text-muted-foreground text-xs transition hover:text-foreground'
-              >
-                Forgot password?
-              </button>
-            </div>
-            <div className='relative'>
               <Input
-                id='password'
-                name='password'
+                id='email'
+                name='email'
+                placeholder='Enter your email'
                 required
-                type={showPassword ? 'text' : 'password'}
                 autoCapitalize='none'
-                autoComplete='current-password'
+                autoComplete='email'
                 autoCorrect='off'
-                placeholder='Enter your password'
-                value={password}
-                onChange={handlePasswordChange}
+                value={email}
+                onChange={handleEmailChange}
                 className={cn(
-                  'rounded-[10px] pr-10 shadow-sm transition-colors focus:border-gray-400 focus:ring-2 focus:ring-gray-100',
-                  showValidationError &&
-                    passwordErrors.length > 0 &&
+                  'rounded-[10px] shadow-sm transition-colors focus:border-gray-400 focus:ring-2 focus:ring-gray-100',
+                  showEmailValidationError &&
+                    emailErrors.length > 0 &&
                     'border-red-500 focus:border-red-500 focus:ring-red-100 focus-visible:ring-red-500'
                 )}
               />
-              <button
-                type='button'
-                onClick={() => setShowPassword(!showPassword)}
-                className='-translate-y-1/2 absolute top-1/2 right-3 text-gray-500 transition hover:text-gray-700'
-                aria-label={showPassword ? 'Hide password' : 'Show password'}
-              >
-                {showPassword ? <EyeOff size={18} /> : <Eye size={18} />}
-              </button>
+              {showEmailValidationError && emailErrors.length > 0 && (
+                <div className='mt-1 space-y-1 text-red-400 text-xs'>
+                  {emailErrors.map((error, index) => (
+                    <p key={index}>{error}</p>
+                  ))}
+                </div>
+              )}
             </div>
-            {showValidationError && passwordErrors.length > 0 && (
-              <div className='mt-1 space-y-1 text-red-400 text-xs'>
-                {passwordErrors.map((error, index) => (
-                  <p key={index}>{error}</p>
-                ))}
+            <div className='space-y-2'>
+              <div className='flex items-center justify-between'>
+                <Label htmlFor='password'>Password</Label>
+                <button
+                  type='button'
+                  onClick={() => setForgotPasswordOpen(true)}
+                  className='font-medium text-muted-foreground text-xs transition hover:text-foreground'
+                >
+                  Forgot password?
+                </button>
               </div>
-            )}
+              <div className='relative'>
+                <Input
+                  id='password'
+                  name='password'
+                  required
+                  type={showPassword ? 'text' : 'password'}
+                  autoCapitalize='none'
+                  autoComplete='current-password'
+                  autoCorrect='off'
+                  placeholder='Enter your password'
+                  value={password}
+                  onChange={handlePasswordChange}
+                  className={cn(
+                    'rounded-[10px] pr-10 shadow-sm transition-colors focus:border-gray-400 focus:ring-2 focus:ring-gray-100',
+                    showValidationError &&
+                      passwordErrors.length > 0 &&
+                      'border-red-500 focus:border-red-500 focus:ring-red-100 focus-visible:ring-red-500'
+                  )}
+                />
+                <button
+                  type='button'
+                  onClick={() => setShowPassword(!showPassword)}
+                  className='-translate-y-1/2 absolute top-1/2 right-3 text-gray-500 transition hover:text-gray-700'
+                  aria-label={showPassword ? 'Hide password' : 'Show password'}
+                >
+                  {showPassword ? <EyeOff size={18} /> : <Eye size={18} />}
+                </button>
+              </div>
+              {showValidationError && passwordErrors.length > 0 && (
+                <div className='mt-1 space-y-1 text-red-400 text-xs'>
+                  {passwordErrors.map((error, index) => (
+                    <p key={index}>{error}</p>
+                  ))}
+                </div>
+              )}
+            </div>
           </div>
-        </div>
 
-        <Button
-          type='submit'
-          className={`${buttonClass} flex w-full items-center justify-center gap-2 rounded-[10px] border font-medium text-[15px] text-white transition-all duration-200`}
-          disabled={isLoading}
-        >
-          {isLoading ? 'Signing in...' : 'Sign in'}
-        </Button>
-      </form>
+          <Button
+            type='submit'
+            className={`${buttonClass} flex w-full items-center justify-center gap-2 rounded-[10px] border font-medium text-[15px] text-white transition-all duration-200`}
+            disabled={isLoading}
+          >
+            {isLoading ? 'Signing in...' : 'Sign in'}
+          </Button>
+        </form>
+      )}
 
-      {(githubAvailable || googleAvailable) && (
+      {/* Divider - show when we have multiple auth methods */}
+      {showDivider && (
         <div className={`${inter.className} relative my-6 font-light`}>
           <div className='absolute inset-0 flex items-center'>
             <div className='auth-divider w-full border-t' />
@@ -476,22 +501,37 @@ export default function LoginPage({
         </div>
       )}
 
-      <SocialLoginButtons
-        googleAvailable={googleAvailable}
-        githubAvailable={githubAvailable}
-        isProduction={isProduction}
-        callbackURL={callbackUrl}
-      />
+      {showBottomSection && (
+        <div className={cn(inter.className, !emailEnabled ? 'mt-8' : undefined)}>
+          <SocialLoginButtons
+            googleAvailable={googleAvailable}
+            githubAvailable={githubAvailable}
+            isProduction={isProduction}
+            callbackURL={callbackUrl}
+          >
+            {ssoEnabled && !hasOnlySSO && (
+              <SSOLoginButton
+                callbackURL={callbackUrl}
+                variant='outline'
+                primaryClassName={buttonClass}
+              />
+            )}
+          </SocialLoginButtons>
+        </div>
+      )}
 
-      <div className={`${inter.className} pt-6 text-center font-light text-[14px]`}>
-        <span className='font-normal'>Don't have an account? </span>
-        <Link
-          href={isInviteFlow ? `/signup?invite_flow=true&callbackUrl=${callbackUrl}` : '/signup'}
-          className='font-medium text-[var(--brand-accent-hex)] underline-offset-4 transition hover:text-[var(--brand-accent-hover-hex)] hover:underline'
-        >
-          Sign up
-        </Link>
-      </div>
+      {/* Only show signup link if email/password signup is enabled */}
+      {!isFalsy(env.NEXT_PUBLIC_EMAIL_PASSWORD_SIGNUP_ENABLED) && (
+        <div className={`${inter.className} pt-6 text-center font-light text-[14px]`}>
+          <span className='font-normal'>Don't have an account? </span>
+          <Link
+            href={isInviteFlow ? `/signup?invite_flow=true&callbackUrl=${callbackUrl}` : '/signup'}
+            className='font-medium text-[var(--brand-accent-hex)] underline-offset-4 transition hover:text-[var(--brand-accent-hover-hex)] hover:underline'
+          >
+            Sign up
+          </Link>
+        </div>
+      )}
 
       <div
         className={`${inter.className} auth-text-muted absolute right-0 bottom-0 left-0 px-8 pb-8 text-center font-[340] text-[13px] leading-relaxed sm:px-8 md:px-[44px]`}