feat: add Apple Sign-In support to ory_social_provider resource

Add apple_team_id, apple_private_key_id, and apple_private_key attributes
to the social provider resource. Apple uses a non-standard OAuth2 flow
where Ory generates the JWT client_secret from these fields instead of
requiring a static secret.

- Make client_secret optional (Apple providers don't need it)
- Add ValidateConfig with rules for Apple vs non-Apple providers
- Validate empty strings and handle unknown values correctly
- Update buildProviderConfig/Read to handle Apple fields
- Add acceptance tests for Apple create/import/update
- Generate test PEM keys at runtime to avoid secret scanner flags
- Update docs and examples

Closes #80

Author: KT-Doan

docs/resources/social_provider.md

@@ -33,6 +33,18 @@ The `provider_type` attribute determines which OAuth2/OIDC integration to use:
 
 ~> **Note:** When using `provider_type = "generic"`, you **must** set `issuer_url` to the OIDC issuer URL. The provider uses OIDC discovery to find authorization and token endpoints automatically.
 
+## Apple Sign-In
+
+Apple uses a non-standard authentication flow. Instead of a static `client_secret`, Apple requires:
+
+- **`apple_team_id`** — Your Apple Developer Team ID (e.g., `KP76DQS54M`)
+- **`apple_private_key_id`** — The key ID from the Apple Developer portal (e.g., `UX56C66723`)
+- **`apple_private_key`** — The private key in PEM format (the contents of your `.p8` file)
+
+Ory uses these to automatically generate the JWT `client_secret` required by Apple's OAuth2 flow. You do **not** need to set `client_secret` when using Apple-specific fields.
+
+Alternatively, you may provide a pre-generated `client_secret` directly if you prefer to manage the JWT yourself.
+
 ## Example Usage
 
 ```terraform
@@ -64,13 +76,15 @@ resource "ory_social_provider" "microsoft" {
   scope         = ["openid", "profile", "email"]
 }
 
-# Apple Sign-In
+# Apple Sign-In (using Apple-specific credentials)
 resource "ory_social_provider" "apple" {
-  provider_id   = "apple"
-  provider_type = "apple"
-  client_id     = var.apple_client_id
-  client_secret = var.apple_client_secret
-  scope         = ["email", "name"]
+  provider_id          = "apple"
+  provider_type        = "apple"
+  client_id            = var.apple_service_id
+  apple_team_id        = var.apple_team_id
+  apple_private_key_id = var.apple_private_key_id
+  apple_private_key    = var.apple_private_key
+  scope                = ["email", "name"]
 }
 
 # Generic OIDC Provider with custom claims mapping
@@ -129,13 +143,25 @@ variable "azure_tenant_id" {
   type = string
 }
 
-variable "apple_client_id" {
-  type = string
+variable "apple_service_id" {
+  description = "Apple Service ID (e.g., com.example.auth)"
+  type        = string
 }
 
-variable "apple_client_secret" {
-  type      = string
-  sensitive = true
+variable "apple_team_id" {
+  description = "Apple Developer Team ID"
+  type        = string
+}
+
+variable "apple_private_key_id" {
+  description = "Apple private key ID from the Developer portal"
+  type        = string
+}
+
+variable "apple_private_key" {
+  description = "Apple private key in PEM format (.p8 file contents)"
+  type        = string
+  sensitive   = true
 }
 
 variable "sso_client_id" {
@@ -173,6 +199,7 @@ If not set, the provider uses a default mapper that extracts the email claim.
 - **`provider_id` and `provider_type` cannot be changed** after creation. Changing either forces a new resource.
 - **`client_secret` is write-only.** The API does not return secrets on read, so Terraform cannot detect external changes to the secret.
 - **`tenant` maps to `microsoft_tenant`** in the Ory API. This is only used with `provider_type = "microsoft"`.
+- **Apple-specific fields** (`apple_team_id`, `apple_private_key_id`, `apple_private_key`) are only valid with `provider_type = "apple"`. The `apple_private_key` is write-only (not returned by API).
 - **Deleting the last provider** resets the entire OIDC configuration to a disabled state with an empty providers array.
 
 ## Import
@@ -183,21 +210,27 @@ Import using the provider ID:
 terraform import ory_social_provider.google google
 ```
 
-The `provider_id` is the unique identifier you chose when creating the provider. After import, you must provide `client_secret` in your configuration since it cannot be read from the API.
+The `provider_id` is the unique identifier you chose when creating the provider. After import, you must provide write-only credentials in your configuration since they cannot be read from the API:
+
+- **Non-Apple providers:** Set `client_secret`.
+- **Apple providers:** Set either `client_secret` (pre-generated JWT) or all three Apple-specific fields (`apple_team_id`, `apple_private_key_id`, and `apple_private_key`).
 
 <!-- schema generated by tfplugindocs -->
 ## Schema
 
 ### Required
 
 - `client_id` (String) OAuth2 client ID from the provider.
-- `client_secret` (String, Sensitive) OAuth2 client secret from the provider.
 - `provider_id` (String) Unique identifier for the provider (used in callback URLs).
 - `provider_type` (String) Provider type (google, github, microsoft, apple, generic, etc.).
 
 ### Optional
 
+- `apple_private_key` (String, Sensitive) Apple private key in PEM format (contents of the .p8 file). Required when provider_type is "apple" and client_secret is not set. Ory uses this to generate the JWT client secret automatically.
+- `apple_private_key_id` (String) Apple private key ID from the Apple Developer portal (e.g., "UX56C66723"). Required when provider_type is "apple" and client_secret is not set.
+- `apple_team_id` (String) Apple Developer Team ID (e.g., "KP76DQS54M"). Required when provider_type is "apple" and client_secret is not set.
 - `auth_url` (String) Custom authorization URL (for non-standard providers).
+- `client_secret` (String, Sensitive) OAuth2 client secret from the provider. Required for all providers except Apple (where Ory generates the secret from apple_team_id, apple_private_key_id, and apple_private_key).
 - `issuer_url` (String) OIDC issuer URL (required for generic providers).
 - `mapper_url` (String) Jsonnet mapper URL for claims mapping. Can be a URL or base64-encoded Jsonnet (base64://...). If not set, a default mapper that extracts email from claims will be used.
 - `project_id` (String) Project ID. If not set, uses provider's project_id.

examples/resources/ory_social_provider/resource.tf

@@ -26,13 +26,15 @@ resource "ory_social_provider" "microsoft" {
   scope         = ["openid", "profile", "email"]
 }
 
-# Apple Sign-In
+# Apple Sign-In (using Apple-specific credentials)
 resource "ory_social_provider" "apple" {
-  provider_id   = "apple"
-  provider_type = "apple"
-  client_id     = var.apple_client_id
-  client_secret = var.apple_client_secret
-  scope         = ["email", "name"]
+  provider_id          = "apple"
+  provider_type        = "apple"
+  client_id            = var.apple_service_id
+  apple_team_id        = var.apple_team_id
+  apple_private_key_id = var.apple_private_key_id
+  apple_private_key    = var.apple_private_key
+  scope                = ["email", "name"]
 }
 
 # Generic OIDC Provider with custom claims mapping
@@ -91,13 +93,25 @@ variable "azure_tenant_id" {
   type = string
 }
 
-variable "apple_client_id" {
-  type = string
+variable "apple_service_id" {
+  description = "Apple Service ID (e.g., com.example.auth)"
+  type        = string
 }
 
-variable "apple_client_secret" {
-  type      = string
-  sensitive = true
+variable "apple_team_id" {
+  description = "Apple Developer Team ID"
+  type        = string
+}
+
+variable "apple_private_key_id" {
+  description = "Apple private key ID from the Developer portal"
+  type        = string
+}
+
+variable "apple_private_key" {
+  description = "Apple private key in PEM format (.p8 file contents)"
+  type        = string
+  sensitive   = true
 }
 
 variable "sso_client_id" {

internal/resources/socialprovider/resource.go

@@ -18,9 +18,10 @@ import (
 )
 
 var (
-	_ resource.Resource                = &SocialProviderResource{}
-	_ resource.ResourceWithConfigure   = &SocialProviderResource{}
-	_ resource.ResourceWithImportState = &SocialProviderResource{}
+	_ resource.Resource                   = &SocialProviderResource{}
+	_ resource.ResourceWithConfigure      = &SocialProviderResource{}
+	_ resource.ResourceWithImportState    = &SocialProviderResource{}
+	_ resource.ResourceWithValidateConfig = &SocialProviderResource{}
 )
 
 func NewResource() resource.Resource {
@@ -32,18 +33,21 @@ type SocialProviderResource struct {
 }
 
 type SocialProviderResourceModel struct {
-	ID           types.String `tfsdk:"id"`
-	ProjectID    types.String `tfsdk:"project_id"`
-	ProviderID   types.String `tfsdk:"provider_id"`
-	ProviderType types.String `tfsdk:"provider_type"`
-	ClientID     types.String `tfsdk:"client_id"`
-	ClientSecret types.String `tfsdk:"client_secret"`
-	IssuerURL    types.String `tfsdk:"issuer_url"`
-	Scope        types.List   `tfsdk:"scope"`
-	MapperURL    types.String `tfsdk:"mapper_url"`
-	AuthURL      types.String `tfsdk:"auth_url"`
-	TokenURL     types.String `tfsdk:"token_url"`
-	Tenant       types.String `tfsdk:"tenant"`
+	ID                types.String `tfsdk:"id"`
+	ProjectID         types.String `tfsdk:"project_id"`
+	ProviderID        types.String `tfsdk:"provider_id"`
+	ProviderType      types.String `tfsdk:"provider_type"`
+	ClientID          types.String `tfsdk:"client_id"`
+	ClientSecret      types.String `tfsdk:"client_secret"`
+	IssuerURL         types.String `tfsdk:"issuer_url"`
+	Scope             types.List   `tfsdk:"scope"`
+	MapperURL         types.String `tfsdk:"mapper_url"`
+	AuthURL           types.String `tfsdk:"auth_url"`
+	TokenURL          types.String `tfsdk:"token_url"`
+	Tenant            types.String `tfsdk:"tenant"`
+	AppleTeamID       types.String `tfsdk:"apple_team_id"`
+	ApplePrivateKeyID types.String `tfsdk:"apple_private_key_id"`
+	ApplePrivateKey   types.String `tfsdk:"apple_private_key"`
 }
 
 func (r *SocialProviderResource) Metadata(ctx context.Context, req resource.MetadataRequest, resp *resource.MetadataResponse) {
@@ -89,8 +93,8 @@ func (r *SocialProviderResource) Schema(ctx context.Context, req resource.Schema
 				Required:    true,
 			},
 			"client_secret": schema.StringAttribute{
-				Description: "OAuth2 client secret from the provider.",
-				Required:    true,
+				Description: "OAuth2 client secret from the provider. Required for all providers except Apple (where Ory generates the secret from apple_team_id, apple_private_key_id, and apple_private_key).",
+				Optional:    true,
 				Sensitive:   true,
 			},
 			"issuer_url": schema.StringAttribute{
@@ -118,6 +122,19 @@ func (r *SocialProviderResource) Schema(ctx context.Context, req resource.Schema
 				Description: "Tenant ID (for Microsoft/Azure providers).",
 				Optional:    true,
 			},
+			"apple_team_id": schema.StringAttribute{
+				Description: "Apple Developer Team ID (e.g., \"KP76DQS54M\"). Required when provider_type is \"apple\" and client_secret is not set.",
+				Optional:    true,
+			},
+			"apple_private_key_id": schema.StringAttribute{
+				Description: "Apple private key ID from the Apple Developer portal (e.g., \"UX56C66723\"). Required when provider_type is \"apple\" and client_secret is not set.",
+				Optional:    true,
+			},
+			"apple_private_key": schema.StringAttribute{
+				Description: "Apple private key in PEM format (contents of the .p8 file). Required when provider_type is \"apple\" and client_secret is not set. Ory uses this to generate the JWT client secret automatically.",
+				Optional:    true,
+				Sensitive:   true,
+			},
 		},
 	}
 }
@@ -135,19 +152,94 @@ func (r *SocialProviderResource) Configure(ctx context.Context, req resource.Con
 	r.client = oryClient
 }
 
+func (r *SocialProviderResource) ValidateConfig(ctx context.Context, req resource.ValidateConfigRequest, resp *resource.ValidateConfigResponse) {
+	var config SocialProviderResourceModel
+	resp.Diagnostics.Append(req.Config.Get(ctx, &config)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	// Skip validation if provider_type is not yet known
+	if config.ProviderType.IsNull() || config.ProviderType.IsUnknown() {
+		return
+	}
+
+	providerType := config.ProviderType.ValueString()
+
+	// Treat attributes as "configured" when they are non-null, even if their values are unknown.
+	// This ensures validation works correctly when attributes reference other resources.
+	hasClientSecret := !config.ClientSecret.IsNull()
+	hasAppleTeamID := !config.AppleTeamID.IsNull()
+	hasApplePrivateKeyID := !config.ApplePrivateKeyID.IsNull()
+	hasApplePrivateKey := !config.ApplePrivateKey.IsNull()
+	hasAnyAppleField := hasAppleTeamID || hasApplePrivateKeyID || hasApplePrivateKey
+	hasAllAppleFields := hasAppleTeamID && hasApplePrivateKeyID && hasApplePrivateKey
+
+	// Validate that known (non-unknown) values are not empty strings
+	if hasClientSecret && !config.ClientSecret.IsUnknown() && config.ClientSecret.ValueString() == "" {
+		resp.Diagnostics.AddAttributeError(path.Root("client_secret"), "Invalid Attribute Value", "client_secret must not be an empty string.")
+	}
+	if hasAppleTeamID && !config.AppleTeamID.IsUnknown() && config.AppleTeamID.ValueString() == "" {
+		resp.Diagnostics.AddAttributeError(path.Root("apple_team_id"), "Invalid Attribute Value", "apple_team_id must not be an empty string.")
+	}
+	if hasApplePrivateKeyID && !config.ApplePrivateKeyID.IsUnknown() && config.ApplePrivateKeyID.ValueString() == "" {
+		resp.Diagnostics.AddAttributeError(path.Root("apple_private_key_id"), "Invalid Attribute Value", "apple_private_key_id must not be an empty string.")
+	}
+	if hasApplePrivateKey && !config.ApplePrivateKey.IsUnknown() && config.ApplePrivateKey.ValueString() == "" {
+		resp.Diagnostics.AddAttributeError(path.Root("apple_private_key"), "Invalid Attribute Value", "apple_private_key must not be an empty string.")
+	}
+
+	if providerType == "apple" {
+		// Apple: needs either client_secret OR all three Apple-specific fields
+		if !hasClientSecret && !hasAllAppleFields {
+			resp.Diagnostics.AddAttributeError(
+				path.Root("client_secret"),
+				"Missing Apple Provider Configuration",
+				"Apple providers require either client_secret or all three Apple-specific attributes: apple_team_id, apple_private_key_id, and apple_private_key.",
+			)
+		}
+		if hasAnyAppleField && !hasAllAppleFields {
+			resp.Diagnostics.AddAttributeError(
+				path.Root("apple_team_id"),
+				"Incomplete Apple Provider Configuration",
+				"When using Apple-specific attributes, all three must be set: apple_team_id, apple_private_key_id, and apple_private_key.",
+			)
+		}
+	} else {
+		// Non-Apple: client_secret is required
+		if !hasClientSecret {
+			resp.Diagnostics.AddAttributeError(
+				path.Root("client_secret"),
+				"Missing Required Attribute",
+				fmt.Sprintf("client_secret is required for provider_type %q.", providerType),
+			)
+		}
+		// Non-Apple: Apple-specific fields should not be set
+		if hasAnyAppleField {
+			resp.Diagnostics.AddAttributeError(
+				path.Root("provider_type"),
+				"Invalid Attribute Combination",
+				"apple_team_id, apple_private_key_id, and apple_private_key are only valid when provider_type is \"apple\".",
+			)
+		}
+	}
+}
+
 // defaultMapperURL returns the default Jsonnet mapper for common providers.
 // This is a simple mapper that extracts email and subject from the claims.
 // The base64-encoded Jsonnet maps claims to identity traits.
 const defaultMapperURL = "base64://bG9jYWwgY2xhaW1zID0gc3RkLmV4dFZhcignY2xhaW1zJyk7CnsKICBpZGVudGl0eTogewogICAgdHJhaXRzOiB7CiAgICAgIGVtYWlsOiBjbGFpbXMuZW1haWwsCiAgICB9LAogIH0sCn0="
 
 func (r *SocialProviderResource) buildProviderConfig(ctx context.Context, plan *SocialProviderResourceModel) map[string]interface{} {
 	config := map[string]interface{}{
-		"id":            plan.ProviderID.ValueString(),
-		"provider":      plan.ProviderType.ValueString(),
-		"client_id":     plan.ClientID.ValueString(),
-		"client_secret": plan.ClientSecret.ValueString(),
+		"id":        plan.ProviderID.ValueString(),
+		"provider":  plan.ProviderType.ValueString(),
+		"client_id": plan.ClientID.ValueString(),
 	}
 
+	if !plan.ClientSecret.IsNull() && !plan.ClientSecret.IsUnknown() && plan.ClientSecret.ValueString() != "" {
+		config["client_secret"] = plan.ClientSecret.ValueString()
+	}
 	if !plan.IssuerURL.IsNull() && !plan.IssuerURL.IsUnknown() {
 		config["issuer_url"] = plan.IssuerURL.ValueString()
 	}
@@ -172,6 +264,17 @@ func (r *SocialProviderResource) buildProviderConfig(ctx context.Context, plan *
 		config["microsoft_tenant"] = plan.Tenant.ValueString()
 	}
 
+	// Apple-specific fields — skip empty strings to avoid sending blank credentials
+	if !plan.AppleTeamID.IsNull() && !plan.AppleTeamID.IsUnknown() && plan.AppleTeamID.ValueString() != "" {
+		config["apple_team_id"] = plan.AppleTeamID.ValueString()
+	}
+	if !plan.ApplePrivateKeyID.IsNull() && !plan.ApplePrivateKeyID.IsUnknown() && plan.ApplePrivateKeyID.ValueString() != "" {
+		config["apple_private_key_id"] = plan.ApplePrivateKeyID.ValueString()
+	}
+	if !plan.ApplePrivateKey.IsNull() && !plan.ApplePrivateKey.IsUnknown() && plan.ApplePrivateKey.ValueString() != "" {
+		config["apple_private_key"] = plan.ApplePrivateKey.ValueString()
+	}
+
 	return config
 }
 
@@ -429,6 +532,19 @@ func (r *SocialProviderResource) Read(ctx context.Context, req resource.ReadRequ
 		state.Tenant = types.StringValue(tenant)
 	}
 
+	// Read Apple-specific fields, clearing stale state when not returned by the API
+	if teamID, ok := provider["apple_team_id"].(string); ok && teamID != "" {
+		state.AppleTeamID = types.StringValue(teamID)
+	} else {
+		state.AppleTeamID = types.StringNull()
+	}
+	if keyID, ok := provider["apple_private_key_id"].(string); ok && keyID != "" {
+		state.ApplePrivateKeyID = types.StringValue(keyID)
+	} else {
+		state.ApplePrivateKeyID = types.StringNull()
+	}
+	// Don't read back apple_private_key for security - it's sensitive
+
 	// Always ensure ID and ProjectID are set in state
 	state.ID = types.StringValue(providerID)
 	state.ProjectID = types.StringValue(projectID)