Respect the config in BSL when IRSA is configured

This commit makes sure when kopia connects to the repository the
crendentials file specified in BSL.spec.config has the higher priority over
Pod Environment credentials when IRSA is configured.

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

changelogs/unreleased/7374-reasonerjt

@@ -0,0 +1 @@
+Respect and use `credentialsFile` specified in BSL.spec.config when IRSA is configured over Velero Pod Environment credentials

go.mod

@@ -18,9 +18,11 @@ require (
 	github.com/Azure/go-autorest/autorest/to v0.3.0
 	github.com/aws/aws-sdk-go-v2 v1.24.1
 	github.com/aws/aws-sdk-go-v2/config v1.26.3
+	github.com/aws/aws-sdk-go-v2/credentials v1.16.14
 	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.15.11
 	github.com/aws/aws-sdk-go-v2/service/ec2 v1.143.0
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.48.0
+	github.com/aws/aws-sdk-go-v2/service/sts v1.26.7
 	github.com/bombsimon/logrusr/v3 v3.0.0
 	github.com/evanphx/json-patch v5.6.0+incompatible
 	github.com/fatih/color v1.15.0
@@ -83,7 +85,6 @@ require (
 	github.com/Azure/go-autorest/tracing v0.6.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.1.1 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.5.4 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.16.14 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.14.11 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.2.10 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.5.10 // indirect
@@ -95,7 +96,6 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.16.10 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.18.6 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.21.6 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.26.7 // indirect
 	github.com/aws/smithy-go v1.19.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect

pkg/repository/config/aws.go

@@ -19,7 +19,13 @@ package config
 
 import (
 	"context"
+	"fmt"
 	"os"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/credentials"
+	"github.com/aws/aws-sdk-go-v2/credentials/stscreds"
+	"github.com/aws/aws-sdk-go-v2/service/sts"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
 	awsconfig "github.com/aws/aws-sdk-go-v2/config"
@@ -31,13 +37,13 @@ import (
 const (
 	// AWS specific environment variable
 	awsProfileEnvVar         = "AWS_PROFILE"
-	awsRoleEnvVar            = "AWS_ROLE_ARN"
 	awsKeyIDEnvVar           = "AWS_ACCESS_KEY_ID"
 	awsSecretKeyEnvVar       = "AWS_SECRET_ACCESS_KEY"
 	awsSessTokenEnvVar       = "AWS_SESSION_TOKEN"
 	awsProfileKey            = "profile"
 	awsCredentialsFileEnvVar = "AWS_SHARED_CREDENTIALS_FILE"
 	awsConfigFileEnvVar      = "AWS_CONFIG_FILE"
+	awsDefaultProfile        = "default"
 )
 
 // GetS3ResticEnvVars gets the environment variables that restic
@@ -72,10 +78,6 @@ func GetS3ResticEnvVars(config map[string]string) (map[string]string, error) {
 // GetS3Credentials gets the S3 credential values according to the information
 // of the provided config or the system's environment variables
 func GetS3Credentials(config map[string]string) (*aws.Credentials, error) {
-	if os.Getenv(awsRoleEnvVar) != "" {
-		return nil, nil
-	}
-
 	var opts []func(*awsconfig.LoadOptions) error
 	credentialsFile := config[CredentialsFileKey]
 	if credentialsFile == "" {
@@ -93,6 +95,25 @@ func GetS3Credentials(config map[string]string) (*aws.Credentials, error) {
 	if err != nil {
 		return nil, err
 	}
+
+	if credentialsFile != "" && os.Getenv("AWS_WEB_IDENTITY_TOKEN_FILE") != "" && os.Getenv("AWS_ROLE_ARN") != "" {
+		// Reset the config to use the credentials from the credentials/config file
+		profile := config[awsProfileKey]
+		if profile == "" {
+			profile = awsDefaultProfile
+		}
+		sfp, err := awsconfig.LoadSharedConfigProfile(context.Background(), profile, func(o *awsconfig.LoadSharedConfigOptions) {
+			o.ConfigFiles = []string{credentialsFile}
+			o.CredentialsFiles = []string{credentialsFile}
+		})
+		if err != nil {
+			return nil, fmt.Errorf("error loading config profile '%s': %v", profile, err)
+		}
+		if err := resolveCredsFromProfile(&cfg, &sfp); err != nil {
+			return nil, fmt.Errorf("error resolving creds from profile '%s': %v", profile, err)
+		}
+	}
+
 	creds, err := cfg.Credentials.Retrieve(context.Background())
 
 	return &creds, err
@@ -115,3 +136,44 @@ func GetAWSBucketRegion(bucket string) (string, error) {
 	}
 	return region, nil
 }
+
+func resolveCredsFromProfile(cfg *aws.Config, sharedConfig *awsconfig.SharedConfig) error {
+	var err error
+	switch {
+	case sharedConfig.Source != nil:
+		// Assume IAM role with credentials source from a different profile.
+		err = resolveCredsFromProfile(cfg, sharedConfig.Source)
+	case sharedConfig.Credentials.HasKeys():
+		// Static Credentials from Shared Config/Credentials file.
+		cfg.Credentials = credentials.StaticCredentialsProvider{
+			Value: sharedConfig.Credentials,
+		}
+	}
+	if err != nil {
+		return err
+	}
+	if len(sharedConfig.RoleARN) > 0 {
+		credsFromAssumeRole(cfg, sharedConfig)
+	}
+	return nil
+}
+
+func credsFromAssumeRole(cfg *aws.Config, sharedCfg *awsconfig.SharedConfig) {
+	optFns := []func(*stscreds.AssumeRoleOptions){
+		func(options *stscreds.AssumeRoleOptions) {
+			options.RoleSessionName = sharedCfg.RoleSessionName
+			if sharedCfg.RoleDurationSeconds != nil {
+				if *sharedCfg.RoleDurationSeconds/time.Minute > 15 {
+					options.Duration = *sharedCfg.RoleDurationSeconds
+				}
+			}
+			if len(sharedCfg.ExternalID) > 0 {
+				options.ExternalID = aws.String(sharedCfg.ExternalID)
+			}
+			if len(sharedCfg.MFASerial) != 0 {
+				options.SerialNumber = aws.String(sharedCfg.MFASerial)
+			}
+		},
+	}
+	cfg.Credentials = stscreds.NewAssumeRoleProvider(sts.NewFromConfig(*cfg), sharedCfg.RoleARN, optFns...)
+}

pkg/repository/provider/unified_repo.go

@@ -505,7 +505,7 @@ func getStorageVariables(backupLocation *velerov1api.BackupStorageLocation, repo
 			}
 
 			s3URL = url.Host
-			disableTLS = (url.Scheme == "http")
+			disableTLS = url.Scheme == "http"
 		}
 
 		result[udmrepo.StoreOptionS3Endpoint] = strings.Trim(s3URL, "/")