azuread_named_location: validation for ip_ranges property

docs/resources/named_location.md

@@ -61,7 +61,7 @@ The following arguments are supported:
 
 `ip` block supports the following:
 
-* `ip_ranges` - (Required) List of IP address ranges in IPv4 CIDR format (e.g. `1.2.3.4/32`) or any allowable IPv6 format from IETF RFC596.
+* `ip_ranges` - (Required) List of IP address ranges in IPv4 CIDR format (e.g. `1.2.3.4/32`) or any allowable IPv6 format from IETF RFC596. Each CIDR prefix must be `/8` or larger.
 * `trusted` - (Optional) Whether the named location is trusted. Defaults to `false`.
 
 ---

internal/services/conditionalaccess/named_location_resource.go

@@ -64,7 +64,8 @@ func namedLocationResource() *pluginsdk.Resource {
 							Type:     pluginsdk.TypeList,
 							Required: true,
 							Elem: &pluginsdk.Schema{
-								Type: pluginsdk.TypeString,
+								Type:         pluginsdk.TypeString,
+								ValidateFunc: validation.PrefixLengthAtLeast(8),
 							},
 						},
 
@@ -88,7 +89,8 @@ func namedLocationResource() *pluginsdk.Resource {
 							Type:     pluginsdk.TypeList,
 							Required: true,
 							Elem: &pluginsdk.Schema{
-								Type: pluginsdk.TypeString,
+								Type:         pluginsdk.TypeString,
+								ValidateFunc: validation.StringIsNotEmpty,
 							},
 						},
 

internal/tf/validation/net.go

@@ -0,0 +1,79 @@
+package validation
+
+import (
+	"fmt"
+	"net/netip"
+)
+
+func StringIsIpPrefix(i interface{}, k string) (warnings []string, errors []error) {
+	if warnings, errors = StringIsNotEmpty(i, k); len(errors) > 0 {
+		return warnings, errors
+	}
+
+	if _, err := netip.ParsePrefix(i.(string)); err != nil {
+		return nil, []error{fmt.Errorf("expected %q to be a valid IPv4 or IPv6 prefix", k)}
+	}
+
+	return
+}
+
+func PrefixLengthAtLeast(minLength int) func(interface{}, string) ([]string, []error) {
+	return func(i interface{}, k string) (warnings []string, errors []error) {
+		if warnings, errors = StringIsNotEmpty(i, k); len(errors) > 0 {
+			return warnings, errors
+		}
+
+		prefix, err := netip.ParsePrefix(i.(string))
+		if err != nil {
+			return nil, []error{fmt.Errorf("expected %q to be a valid IPv4 or IPv6 prefix", k)}
+		}
+
+		if prefixLength := prefix.Bits(); prefixLength < minLength {
+			return nil, []error{fmt.Errorf("expected %q to have a prefix length at least %d, got %d", k, minLength, prefixLength)}
+		}
+
+		return
+	}
+}
+
+func PrefixLengthAtMost(maxLength int) func(interface{}, string) ([]string, []error) {
+	return func(i interface{}, k string) (warnings []string, errors []error) {
+		if warnings, errors = StringIsNotEmpty(i, k); len(errors) > 0 {
+			return warnings, errors
+		}
+
+		prefix, err := netip.ParsePrefix(i.(string))
+		if err != nil {
+			return nil, []error{fmt.Errorf("expected %q to be a valid IPv4 or IPv6 prefix", k)}
+		}
+
+		if prefixLength := prefix.Bits(); prefixLength > maxLength {
+			return nil, []error{fmt.Errorf("expected %q to have a prefix length at most %d, got %d", k, maxLength, prefixLength)}
+		}
+
+		return
+	}
+}
+
+func PrefixLengthBetween(minLength, maxLength int) func(interface{}, string) ([]string, []error) {
+	return func(i interface{}, k string) (warnings []string, errors []error) {
+		if warnings, errors = StringIsNotEmpty(i, k); len(errors) > 0 {
+			return warnings, errors
+		}
+
+		prefix, err := netip.ParsePrefix(i.(string))
+		if err != nil {
+			return nil, []error{fmt.Errorf("expected %q to be a valid IPv4 or IPv6 prefix", k)}
+		}
+
+		if prefixLength := prefix.Bits(); prefixLength < minLength {
+			return nil, []error{fmt.Errorf("expected %q to have a prefix length at least %d, got %d", k, minLength, prefixLength)}
+		}
+
+		if prefixLength := prefix.Bits(); prefixLength > maxLength {
+			return nil, []error{fmt.Errorf("expected %q to have a prefix length at most %d, got %d", k, maxLength, prefixLength)}
+		}
+
+		return
+	}
+}

internal/tf/validation/net_test.go

@@ -0,0 +1,193 @@
+package validation
+
+import (
+	"testing"
+)
+
+func TestStringIsIpPrefix(t *testing.T) {
+	cases := []struct {
+		Value    string
+		TestName string
+		ErrCount int
+	}{
+		{
+			Value:    "10.0.0.0/8",
+			TestName: "Valid_NonRoutable1",
+			ErrCount: 0,
+		},
+		{
+			Value:    "192.168.0.0/16",
+			TestName: "Valid_NonRoutable2",
+			ErrCount: 0,
+		},
+		{
+			Value:    "172.16.20.5",
+			TestName: "Invalid_SingleAddress",
+			ErrCount: 1,
+		},
+		{
+			Value:    "224.0.50.8",
+			TestName: "Invalid_MulticastAddress",
+			ErrCount: 1,
+		},
+		{
+			Value:    "100.64.10.0",
+			TestName: "Invalid_Network",
+			ErrCount: 1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.TestName, func(t *testing.T) {
+			warnings, errors := StringIsIpPrefix(tc.Value, "test")
+
+			if len(warnings) > 0 {
+				t.Fatalf("Expected StringIsIpPrefix to have %d not %d warnings for %q", 0, len(warnings), tc.TestName)
+			}
+			if len(errors) != tc.ErrCount {
+				t.Fatalf("Expected StringIsIpPrefix to have %d not %d errors for %q", tc.ErrCount, len(errors), tc.TestName)
+			}
+		})
+	}
+}
+
+func TestPrefixLengthAtLeast(t *testing.T) {
+	cases := []struct {
+		MinLength int
+		Value     string
+		TestName  string
+		ErrCount  int
+	}{
+		{
+			MinLength: 8,
+			Value:     "10.0.0.0/8",
+			TestName:  "Valid_Exact",
+			ErrCount:  0,
+		},
+		{
+			MinLength: 16,
+			Value:     "192.168.0.0/24",
+			TestName:  "Valid_Larger",
+			ErrCount:  0,
+		},
+		{
+			MinLength: 8,
+			Value:     "10.0.0.0/4",
+			TestName:  "Invalid_Smaller",
+			ErrCount:  1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.TestName, func(t *testing.T) {
+			warnings, errors := PrefixLengthAtLeast(tc.MinLength)(tc.Value, "test")
+
+			if len(warnings) > 0 {
+				t.Fatalf("Expected PrefixLengthAtLeast to have %d not %d warnings for %q", 0, len(warnings), tc.TestName)
+			}
+			if len(errors) != tc.ErrCount {
+				t.Fatalf("Expected PrefixLengthAtLeast to have %d not %d errors for %q", tc.ErrCount, len(errors), tc.TestName)
+			}
+		})
+	}
+}
+
+func TestPrefixLengthAtMost(t *testing.T) {
+	cases := []struct {
+		MaxLength int
+		Value     string
+		TestName  string
+		ErrCount  int
+	}{
+		{
+			MaxLength: 24,
+			Value:     "192.168.0.0/24",
+			TestName:  "Valid_Exact",
+			ErrCount:  0,
+		},
+		{
+			MaxLength: 16,
+			Value:     "10.0.0.0/8",
+			TestName:  "Valid_Smaller",
+			ErrCount:  0,
+		},
+		{
+			MaxLength: 8,
+			Value:     "10.0.0.0/12",
+			TestName:  "Invalid_Larger",
+			ErrCount:  1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.TestName, func(t *testing.T) {
+			warnings, errors := PrefixLengthAtMost(tc.MaxLength)(tc.Value, "test")
+
+			if len(warnings) > 0 {
+				t.Fatalf("Expected PrefixLengthAtMost to have %d not %d warnings for %q", 0, len(warnings), tc.TestName)
+			}
+			if len(errors) != tc.ErrCount {
+				t.Fatalf("Expected PrefixLengthAtMost to have %d not %d errors for %q", tc.ErrCount, len(errors), tc.TestName)
+			}
+		})
+	}
+}
+
+func TestPrefixLengthBetween(t *testing.T) {
+	cases := []struct {
+		MinLength int
+		MaxLength int
+		Value     string
+		TestName  string
+		ErrCount  int
+	}{
+		{
+			MinLength: 16,
+			MaxLength: 24,
+			Value:     "192.168.0.0/24",
+			TestName:  "Valid_ExactUpper",
+			ErrCount:  0,
+		},
+		{
+			MinLength: 16,
+			MaxLength: 24,
+			Value:     "172.16.0.0/16",
+			TestName:  "Valid_ExactLower",
+			ErrCount:  0,
+		},
+		{
+			MinLength: 8,
+			MaxLength: 16,
+			Value:     "10.50.0.0/12",
+			TestName:  "Valid_InRange",
+			ErrCount:  0,
+		},
+		{
+			MinLength: 24,
+			MaxLength: 28,
+			Value:     "10.0.0.0/12",
+			TestName:  "Invalid_Smaller",
+			ErrCount:  1,
+		},
+		{
+			MinLength: 24,
+			MaxLength: 28,
+			Value:     "192.168.100.0/30",
+			TestName:  "Invalid_Larger",
+			ErrCount:  1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.TestName, func(t *testing.T) {
+			warnings, errors := PrefixLengthBetween(tc.MinLength, tc.MaxLength)(tc.Value, "test")
+
+			if len(warnings) > 0 {
+				t.Fatalf("Expected PrefixLengthBetween to have %d not %d warnings for %q", 0, len(warnings), tc.TestName)
+			}
+			if len(errors) != tc.ErrCount {
+				t.Fatalf("Expected PrefixLengthBetween to have %d not %d errors for %q", tc.ErrCount, len(errors), tc.TestName)
+			}
+		})
+	}
+}