wip: account details from az and the token

internal/provider/azure/account.go

@@ -0,0 +1,160 @@
+package azure
+
+import (
+	"fmt"
+	"slices"
+	"strings"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/provider"
+)
+
+// accountDetails describes an az account from az's account list and the
+// claims of the latest token lazysecrets got for it: nothing is fetched
+// for it.
+type accountDetails struct {
+	account
+	claims func() map[string]any
+}
+
+var _ provider.Accounts = (*Provider)(nil)
+
+// Account describes the az account, once a token has been fetched for it
+// (the user's name and object ID come from the token).
+func (p *Provider) Account() (provider.Account, bool) {
+	if p.account == nil {
+		return provider.Account{}, false
+	}
+	a := p.account
+	claims := a.claims()
+	str := func(k string) string { s, _ := claims[k].(string); return s }
+
+	var out provider.Account
+	add := func(label, value string) {
+		if value != "" {
+			out.Fields = append(out.Fields, provider.Attr{Label: label, Value: value})
+		}
+	}
+	add("name", str("name"))
+	user := a.user
+	if a.userType == "servicePrincipal" {
+		user += " (service principal)"
+	}
+	add("user", user)
+	tenant := a.tenant
+	if a.tenantName != "" {
+		tenant = a.tenantName + " · " + a.tenant
+	}
+	add("tenant", tenant)
+	if oid := str("oid"); oid != "" {
+		add("object ID", oid)
+		out.Copy, out.CopyLabel = oid, "object ID"
+	}
+	if claims != nil {
+		add("sign-in", signInMethods(claims["amr"]))
+		add("roles", directoryRoles(claims["wids"]))
+	}
+	subs := fmt.Sprint(a.subscriptions)
+	if a.defaultSub != "" {
+		subs += " · default " + a.defaultSub
+	}
+	add("subs", subs)
+	if a.cloud != "" && a.cloud != "AzureCloud" {
+		add("cloud", a.cloud)
+	}
+	return out, len(out.Fields) > 0
+}
+
+// signInMethods says how the session was signed in to, from the amr
+// claim: with MFA or not, and by what.
+func signInMethods(amr any) string {
+	list, _ := amr.([]any)
+	var methods []string
+	mfa := false
+	for _, m := range list {
+		s, _ := m.(string)
+		switch s {
+		case "mfa", "ngcmfa":
+			mfa = true
+		case "pwd":
+			methods = append(methods, "password")
+		case "rsa":
+			methods = append(methods, "Windows Hello or certificate")
+		case "fido":
+			methods = append(methods, "security key")
+		case "wia":
+			methods = append(methods, "Windows sign-in")
+		case "otp", "sms":
+			methods = append(methods, "one-time code")
+		}
+	}
+	if len(list) == 0 {
+		return ""
+	}
+	how := strings.Join(methods, ", ")
+	switch {
+	case mfa && how != "":
+		return "MFA · " + how
+	case mfa:
+		return "MFA"
+	case how != "":
+		return "no MFA · " + how
+	}
+	return "no MFA"
+}
+
+// builtinRoles names Entra ID's built-in directory roles by template ID,
+// the IDs a token's wids claim lists.
+var builtinRoles = map[string]string{
+	"62e90394-69f5-4237-9190-012177145e10": "Global Administrator",
+	"f2ef992c-3afb-46b9-b7cf-a126ee74c451": "Global Reader",
+	"e8611ab8-c189-46e8-94e1-60213ab1f814": "Privileged Role Administrator",
+	"7be44c8a-adaf-4e2a-84d6-ab2649e08a13": "Privileged Authentication Administrator",
+	"194ae4cb-b126-40b2-bd5b-6091b380977d": "Security Administrator",
+	"5d6b6bb7-de71-4623-b4af-96380a352509": "Security Reader",
+	"5f2222b1-57c3-48ba-8ad5-d4759f1fde6f": "Security Operator",
+	"9b895d92-2cd3-44c7-9d02-a6ac2d5ea5c3": "Application Administrator",
+	"158c047a-c907-4556-b7ef-446551a6b5f7": "Cloud Application Administrator",
+	"cf1c38e5-3621-4004-a7cb-879624dced7c": "Application Developer",
+	"fe930be7-5e62-47db-91af-98c3a49a38b1": "User Administrator",
+	"fdd7a751-b60b-444a-984c-02652fe8fa1c": "Groups Administrator",
+	"729827e3-9c14-49f7-bb1b-9608f156bbb8": "Helpdesk Administrator",
+	"966707d0-3269-4727-9be2-8c3a10f19b9d": "Password Administrator",
+	"c4e39bd9-1100-46d3-8c65-fb160da0071f": "Authentication Administrator",
+	"0526716b-113d-4c15-b2c8-68e3c22b9f80": "Authentication Policy Administrator",
+	"8ac3fc64-6eca-42ea-9e69-59f4c7b60eb2": "Hybrid Identity Administrator",
+	"b0f54661-2d74-4c50-afa3-1ec803f12efe": "Billing Administrator",
+	"4d6ac14f-3453-41d0-bef9-a3e0c569773a": "License Administrator",
+	"17315797-102d-40b4-93e0-432062caca18": "Compliance Administrator",
+	"29232cdf-9323-42fd-ade2-1d097af3e4de": "Exchange Administrator",
+	"f28a1f50-f6e7-4571-818b-6a12f2af6b6c": "SharePoint Administrator",
+	"69091246-20e8-4a56-aa4d-066075b2a7a8": "Teams Administrator",
+	"3a2c62db-5318-420d-8d74-23affee5d9d5": "Intune Administrator",
+	"11648597-926c-4cf3-9c36-bcebb0ba8dcc": "Power Platform Administrator",
+	"e3973bdf-4987-49ae-837a-ba8e231c7286": "Azure DevOps Administrator",
+	"9360feb5-f418-4baa-8175-e2a00bac4301": "Directory Writers",
+	"88d8e3e3-8f55-4a1e-953a-9b9898b8876b": "Directory Readers",
+	"95e79109-95c0-4d8e-aee3-d01accf2d47b": "Guest Inviter",
+}
+
+// memberRole is in every member's token: not worth listing.
+const memberRole = "b79fbf4d-3ef9-4689-8143-76b194e85509"
+
+// directoryRoles names the roles in a wids claim: built-in ones by name,
+// others by their ID's first part.
+func directoryRoles(wids any) string {
+	list, _ := wids.([]any)
+	var names []string
+	for _, w := range list {
+		id, _ := w.(string)
+		switch name, ok := builtinRoles[strings.ToLower(id)]; {
+		case id == "" || id == memberRole:
+		case ok:
+			names = append(names, name)
+		default:
+			short, _, _ := strings.Cut(id, "-")
+			names = append(names, "role "+short)
+		}
+	}
+	slices.Sort(names)
+	return strings.Join(names, ", ")
+}

internal/provider/azure/accounts.go

@@ -19,7 +19,10 @@ import (
 // account is one az CLI identity in one tenant.
 type account struct {
 	user, tenant  string
+	userType      string // "user" or "servicePrincipal"
 	tenantName    string
+	cloud         string // az's environment: AzureCloud, AzureChinaCloud, …
+	defaultSub    string // az's default subscription's name, if this account's
 	anchor        string // a subscription az maps to this account, to pin it
 	anchorEnabled bool
 	isDefault     bool
@@ -52,12 +55,15 @@ func readAccounts(path string) ([]account, error) {
 	var profile struct {
 		Subscriptions []struct {
 			ID         string `json:"id"`
+			Name       string `json:"name"`
 			State      string `json:"state"`
 			IsDefault  bool   `json:"isDefault"`
 			TenantID   string `json:"tenantId"`
 			TenantName string `json:"tenantDisplayName"`
+			Cloud      string `json:"environmentName"`
 			User       struct {
 				Name string `json:"name"`
+				Type string `json:"type"`
 			} `json:"user"`
 		} `json:"subscriptions"`
 	}
@@ -72,7 +78,7 @@ func readAccounts(path string) ([]account, error) {
 		}
 		i := slices.IndexFunc(out, func(a account) bool { return a.user == s.User.Name && a.tenant == s.TenantID })
 		if i < 0 {
-			out = append(out, account{user: s.User.Name, tenant: s.TenantID, tenantName: s.TenantName})
+			out = append(out, account{user: s.User.Name, tenant: s.TenantID, tenantName: s.TenantName, userType: s.User.Type, cloud: s.Cloud})
 			i = len(out) - 1
 		}
 		a := &out[i]
@@ -82,7 +88,7 @@ func readAccounts(path string) ([]account, error) {
 		enabled := s.State == "Enabled"
 		switch {
 		case s.IsDefault:
-			a.anchor, a.anchorEnabled, a.isDefault = s.ID, enabled, true
+			a.anchor, a.anchorEnabled, a.isDefault, a.defaultSub = s.ID, enabled, true, s.Name
 		case a.isDefault:
 		case a.anchor == "" || enabled && !a.anchorEnabled:
 			a.anchor, a.anchorEnabled = s.ID, enabled
@@ -179,6 +185,7 @@ func NewAccounts(s Settings) ([]*Provider, error) {
 		if err != nil {
 			return nil, err
 		}
+		p.account = &accountDetails{account: a, claims: cred.cred.(*cliCredential).claims}
 		if label != "" {
 			p.id = string(provider.KindAzure) + ":" + a.user + "/" + a.tenant
 			p.label = label

internal/provider/azure/accounts_test.go

@@ -181,11 +181,11 @@ func TestTokenUser(t *testing.T) {
 		`{"upn":"alice@contoso.com"}`:                      false,
 		`{"appid":"00000000-0000-0000-0000-000000000000"}`: false,
 	} {
-		if _, got := tokenUser(jwt(claims), users); got != want {
+		if _, got := tokenUser(tokenClaims(jwt(claims)), users); got != want {
 			t.Errorf("%s: %v", claims, got)
 		}
 	}
-	if _, got := tokenUser("not-a-jwt", users); got {
+	if _, got := tokenUser(tokenClaims("not-a-jwt"), users); got {
 		t.Error("not a JWT")
 	}
 }

internal/provider/azure/azure.go

@@ -36,10 +36,11 @@ var objectTypes = []provider.ObjectType{provider.TypeSecret, provider.TypeKey, p
 type Provider struct {
 	id, label string // "" for the single-account defaults
 
-	cred  azcore.TokenCredential
+	cred    azcore.TokenCredential
-	opts  options
+	opts    options
-	subs  *armsubscriptions.Client
+	account *accountDetails // nil for a service principal from AZURE_*
-	graph *armresourcegraph.Client
+	subs    *armsubscriptions.Client
+	graph   *armresourcegraph.Client
 
 	mu      sync.Mutex
 	vaults  map[string]*vaultClients // by vault URL

internal/provider/azure/cli.go

@@ -42,6 +42,16 @@ type cliCredential struct {
 
 	mu    sync.Mutex
 	cache map[string]azcore.AccessToken // by resource and tenant argument
+	// last is the claims of the latest token in the account's own
+	// tenant, to describe the account (Provider.Account).
+	last map[string]any
+}
+
+// claims are the latest token's claims, nil before the first.
+func (c *cliCredential) claims() map[string]any {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return c.last
 }
 
 func newCLICredential(user, tenant string, accounts func() ([]account, error)) *cliCredential {
@@ -110,29 +120,38 @@ func (c *cliCredential) GetToken(ctx context.Context, opts policy.TokenRequestOp
 	if err != nil {
 		return azcore.AccessToken{}, err
 	}
-	if u, ok := tokenUser(tok.Token, others); ok {
+	claims := tokenClaims(tok.Token)
+	if u, ok := tokenUser(claims, others); ok {
 		return azcore.AccessToken{}, fmt.Errorf("az gave a token for %s, not %s: sign in as %s again", u, c.user, c.user)
 	}
+	if !otherTenant && claims != nil {
+		c.last = claims
+	}
 	c.cache[key] = tok
 	return tok, nil
 }
 
-// tokenUser reports which of users a token was issued to, if any, from
+// tokenClaims reads a JWT's claims, without verifying it: they only
-// its claims. The token isn't verified: this only catches az picking the
+// describe the account and catch az picking the wrong one. nil if it
-// wrong signed-in account.
+// isn't a JWT.
-func tokenUser(token string, users []string) (string, bool) {
+func tokenClaims(token string) map[string]any {
 	parts := strings.Split(token, ".")
-	if len(parts) != 3 || len(users) == 0 {
+	if len(parts) != 3 {
-		return "", false
+		return nil
 	}
 	b, err := base64.RawURLEncoding.DecodeString(strings.TrimRight(parts[1], "="))
 	if err != nil {
-		return "", false
+		return nil
 	}
 	var claims map[string]any
 	if json.Unmarshal(b, &claims) != nil {
-		return "", false
+		return nil
 	}
+	return claims
+}
+
+// tokenUser reports which of users a token's claims are for, if any.
+func tokenUser(claims map[string]any, users []string) (string, bool) {
 	for _, name := range []string{"upn", "unique_name", "preferred_username", "email"} {
 		v, _ := claims[name].(string)
 		if i := strings.LastIndexByte(v, '#'); i >= 0 {

internal/provider/provider.go

@@ -184,3 +184,17 @@ type File struct {
 	Line int    // 1-based; 0 for the top
 	Sops string // the sops command to edit it with; empty for a plain file
 }
+
+// Accounts is implemented by providers that can describe the identity
+// they use, from what they have locally: for the Details pane on the
+// provider's row. ok is false when there's nothing to say.
+type Accounts interface {
+	Account() (Account, bool)
+}
+
+// Account describes a signed-in identity.
+type Account struct {
+	Fields []Attr
+	// Copy is what y copies on the provider's row, named CopyLabel.
+	Copy, CopyLabel string
+}