Merge e5969d9 into 5869d13

Author: irby

internal/command/client.go

@@ -18,11 +18,14 @@ package command
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
 	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
 	commandsdk "github.com/Keyfactor/keyfactor-go-client/v3/api"
+	"github.com/go-logr/logr"
+	"github.com/golang-jwt/jwt/v5"
 	"golang.org/x/net/context"
 	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/google"
@@ -95,6 +98,11 @@ type azure struct {
 
 // GetAccessToken implements TokenCredential.
 func (a *azure) GetAccessToken(ctx context.Context) (string, error) {
+	log := log.FromContext(ctx)
+
+	// To prevent clogging logs every time JWT is generated
+	initializing := a.cred == nil
+
 	// Lazily create the credential if needed
 	if a.cred == nil {
 		c, err := azidentity.NewDefaultAzureCredential(nil)
@@ -104,6 +112,8 @@ func (a *azure) GetAccessToken(ctx context.Context) (string, error) {
 		a.cred = c
 	}
 
+	log.Info(fmt.Sprintf("generating Default Azure Credentials with scopes %s", strings.Join(a.scopes, " ")))
+
 	// Request a token with the provided scopes
 	token, err := a.cred.GetToken(ctx, policy.TokenRequestOptions{
 		Scopes: a.scopes,
@@ -112,8 +122,20 @@ func (a *azure) GetAccessToken(ctx context.Context) (string, error) {
 		return "", fmt.Errorf("%w: failed to fetch token: %w", errTokenFetchFailure, err)
 	}
 
-	log.FromContext(ctx).Info("fetched token using Azure DefaultAzureCredential")
-	return token.Token, nil
+	tokenString := token.Token
+
+	if initializing {
+		// Only want to output this once, don't want to output this every time the JWT is generated
+
+		log.Info("==== BEGIN DEBUG: DefaultAzureCredential JWT ======")
+
+		printClaims(log, tokenString, []string{"aud", "azp", "iss", "sub", "oid"})
+
+		log.Info("==== END DEBUG: DefaultAzureCredential JWT ======")
+	}
+
+	log.Info("fetched token using Azure DefaultAzureCredential")
+	return tokenString, nil
 }
 
 func newAzureDefaultCredentialSource(ctx context.Context, scopes []string) (*azure, error) {
@@ -142,17 +164,28 @@ type gcp struct {
 
 // GetAccessToken implements TokenCredential.
 func (g *gcp) GetAccessToken(ctx context.Context) (string, error) {
-	// Lazily create the TokenSource if it's nil.
 	log := log.FromContext(ctx)
+
+	// To prevent clogging logs every time JWT is generated
+	initializing := g.tokenSource == nil
+
+	// Lazily create the TokenSource if it's nil.
 	if g.tokenSource == nil {
+		log.Info(fmt.Sprintf("generating default Google credentials with scopes %s", strings.Join(g.scopes, " ")))
+
 		credentials, err := google.FindDefaultCredentials(ctx, g.scopes...)
 		if err != nil {
 			return "", fmt.Errorf("%w: failed to find GCP ADC: %w", errTokenFetchFailure, err)
 		}
 		log.Info(fmt.Sprintf("generating a Google OIDC ID token..."))
 
+		// Default audience to "command" if not provided
+		aud := getValueOrDefault(g.audience, "command")
+
+		log.Info(fmt.Sprintf("generating Google id token with audience %s", aud))
+
 		// Use credentials to generate a JWT (requires a service account)
-		tokenSource, err := idtoken.NewTokenSource(ctx, getValueOrDefault(g.audience, "command"), idtoken.WithCredentialsJSON(credentials.JSON))
+		tokenSource, err := idtoken.NewTokenSource(ctx, aud, idtoken.WithCredentialsJSON(credentials.JSON))
 		if err != nil {
 			return "", fmt.Errorf("%w: failed to get GCP ID Token Source: %w", errTokenFetchFailure, err)
 		}
@@ -171,6 +204,14 @@ func (g *gcp) GetAccessToken(ctx context.Context) (string, error) {
 		return "", fmt.Errorf("%w: failed to fetch token from GCP ADC token source: %w", errTokenFetchFailure, err)
 	}
 
+	if initializing {
+		// Only want to output this once, don't want to output this every time the JWT is generated
+
+		log.Info("==== BEGIN DEBUG: Default Google ID Token JWT ======")
+		printClaims(log, token.AccessToken, []string{"aud", "iss", "sub", "email"})
+		log.Info("==== END DEBUG:  Default Google ID Token JWT ======")
+	}
+
 	log.Info("fetched token using GCP ApplicationDefaultCredential")
 
 	return token.AccessToken, nil
@@ -188,3 +229,21 @@ func newGCPDefaultCredentialSource(ctx context.Context, audience string, scopes
 	tokenCredentialSource = source
 	return source, nil
 }
+
+func printClaims(log logr.Logger, token string, claimsToPrint []string) {
+	tokenRaw, _, err := new(jwt.Parser).ParseUnverified(token, jwt.MapClaims{})
+	if err != nil {
+		log.Error(err, "failed to parse JWT")
+	}
+
+	claims, ok := tokenRaw.Claims.(jwt.MapClaims)
+	if !ok {
+		log.Info("Unable to get claims from token")
+	}
+
+	for _, key := range claimsToPrint {
+		if value, ok := claims[key]; ok {
+			log.Info(fmt.Sprintf("	%s:	%s", key, value))
+		}
+	}
+}