/* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package ibm import ( "context" "encoding/json" "fmt" "os" "strings" "time" "github.com/IBM/go-sdk-core/v5/core" sm "github.com/IBM/secrets-manager-go-sdk/v2/secretsmanagerv2" "github.com/google/uuid" "github.com/tidwall/gjson" corev1 "k8s.io/api/core/v1" kclient "sigs.k8s.io/controller-runtime/pkg/client" "sigs.k8s.io/controller-runtime/pkg/webhook/admission" esv1beta1 "github.com/external-secrets/external-secrets/apis/externalsecrets/v1beta1" "github.com/external-secrets/external-secrets/pkg/constants" "github.com/external-secrets/external-secrets/pkg/metrics" "github.com/external-secrets/external-secrets/pkg/utils" "github.com/external-secrets/external-secrets/pkg/utils/resolvers" ) const ( SecretsManagerEndpointEnv = "IBM_SECRETSMANAGER_ENDPOINT" STSEndpointEnv = "IBM_STS_ENDPOINT" SSMEndpointEnv = "IBM_SSM_ENDPOINT" certificateConst = "certificate" intermediateConst = "intermediate" privateKeyConst = "private_key" usernameConst = "username" passwordConst = "password" apikeyConst = "apikey" credentialsConst = "credentials" arbitraryConst = "arbitrary" payloadConst = "payload" smAPIKeyConst = "api_key" errIBMClient = "cannot setup new ibm client: %w" errIBMCredSecretName = "invalid IBM SecretStore resource: missing IBM APIKey" errUninitalizedIBMProvider = "provider IBM is not initialized" errFetchSAKSecret = "could not fetch SecretAccessKey secret: %w" errJSONSecretUnmarshal = "unable to unmarshal secret: %w" errJSONSecretMarshal = "unable to marshal secret: %w" errExtractingSecret = "unable to extract the fetched secret %s of type %s while performing %s" ) var contextTimeout = time.Minute * 2 // https://github.com/external-secrets/external-secrets/issues/644 var ( _ esv1beta1.SecretsClient = &providerIBM{} _ esv1beta1.Provider = &providerIBM{} ) type SecretManagerClient interface { GetSecretWithContext(ctx context.Context, getSecretOptions *sm.GetSecretOptions) (result sm.SecretIntf, response *core.DetailedResponse, err error) GetSecretByNameTypeWithContext(ctx context.Context, getSecretByNameTypeOptions *sm.GetSecretByNameTypeOptions) (result sm.SecretIntf, response *core.DetailedResponse, err error) } type providerIBM struct { IBMClient SecretManagerClient } type client struct { kube kclient.Client store *esv1beta1.IBMProvider namespace string storeKind string credentials []byte } func (c *client) setAuth(ctx context.Context) error { apiKey, err := resolvers.SecretKeyRef(ctx, c.kube, c.storeKind, c.namespace, &c.store.Auth.SecretRef.SecretAPIKey) if err != nil { return err } c.credentials = []byte(apiKey) return nil } func (ibm *providerIBM) DeleteSecret(_ context.Context, _ esv1beta1.PushSecretRemoteRef) error { return fmt.Errorf("not implemented") } // Not Implemented PushSecret. func (ibm *providerIBM) PushSecret(_ context.Context, _ *corev1.Secret, _ esv1beta1.PushSecretData) error { return fmt.Errorf("not implemented") } // Empty GetAllSecrets. func (ibm *providerIBM) GetAllSecrets(_ context.Context, _ esv1beta1.ExternalSecretFind) (map[string][]byte, error) { // TO be implemented return nil, fmt.Errorf("GetAllSecrets not implemented") } func (ibm *providerIBM) GetSecret(_ context.Context, ref esv1beta1.ExternalSecretDataRemoteRef) ([]byte, error) { if utils.IsNil(ibm.IBMClient) { return nil, fmt.Errorf(errUninitalizedIBMProvider) } var secretGroupName string secretType := sm.Secret_SecretType_Arbitrary secretName := ref.Key nameSplitted := strings.Split(secretName, "/") switch len(nameSplitted) { case 2: secretType = nameSplitted[0] secretName = nameSplitted[1] case 3: secretGroupName = nameSplitted[0] secretType = nameSplitted[1] secretName = nameSplitted[2] } switch secretType { case sm.Secret_SecretType_Arbitrary: return getArbitrarySecret(ibm, &secretName, secretGroupName) case sm.Secret_SecretType_UsernamePassword: if ref.Property == "" { return nil, fmt.Errorf("remoteRef.property required for secret type username_password") } return getUsernamePasswordSecret(ibm, &secretName, ref, secretGroupName) case sm.Secret_SecretType_IamCredentials: return getIamCredentialsSecret(ibm, &secretName, secretGroupName) case sm.Secret_SecretType_ServiceCredentials: return getServiceCredentialsSecret(ibm, &secretName, secretGroupName) case sm.Secret_SecretType_ImportedCert: if ref.Property == "" { return nil, fmt.Errorf("remoteRef.property required for secret type imported_cert") } return getImportCertSecret(ibm, &secretName, ref, secretGroupName) case sm.Secret_SecretType_PublicCert: if ref.Property == "" { return nil, fmt.Errorf("remoteRef.property required for secret type public_cert") } return getPublicCertSecret(ibm, &secretName, ref, secretGroupName) case sm.Secret_SecretType_PrivateCert: if ref.Property == "" { return nil, fmt.Errorf("remoteRef.property required for secret type private_cert") } return getPrivateCertSecret(ibm, &secretName, ref, secretGroupName) case sm.Secret_SecretType_Kv: response, err := getSecretData(ibm, &secretName, sm.Secret_SecretType_Kv, secretGroupName) if err != nil { return nil, err } secret, ok := response.(*sm.KVSecret) if !ok { return nil, fmt.Errorf(errExtractingSecret, secretName, sm.Secret_SecretType_Kv, "GetSecret") } return getKVSecret(ref, secret) default: return nil, fmt.Errorf("unknown secret type %s", secretType) } } func getArbitrarySecret(ibm *providerIBM, secretName *string, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_Arbitrary, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[payloadConst]; ok { return []byte(val.(string)), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", payloadConst, *secretName) } func getImportCertSecret(ibm *providerIBM, secretName *string, ref esv1beta1.ExternalSecretDataRemoteRef, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_ImportedCert, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } val, ok := secMap[ref.Property] if ok { return []byte(val.(string)), nil } else if ref.Property == privateKeyConst { // we want to return an empty string in case the secret doesn't contain a private key // this is to ensure that secret of type 'kubernetes.io/tls' gets created as expected, even with an empty private key fmt.Printf("warn: %s is empty for secret %s\n", privateKeyConst, *secretName) return []byte(""), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", ref.Property, ref.Key) } func getPublicCertSecret(ibm *providerIBM, secretName *string, ref esv1beta1.ExternalSecretDataRemoteRef, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_PublicCert, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[ref.Property]; ok { return []byte(val.(string)), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", ref.Property, ref.Key) } func getPrivateCertSecret(ibm *providerIBM, secretName *string, ref esv1beta1.ExternalSecretDataRemoteRef, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_PrivateCert, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[ref.Property]; ok { return []byte(val.(string)), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", ref.Property, ref.Key) } func getIamCredentialsSecret(ibm *providerIBM, secretName *string, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_IamCredentials, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[smAPIKeyConst]; ok { return []byte(val.(string)), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", smAPIKeyConst, *secretName) } func getServiceCredentialsSecret(ibm *providerIBM, secretName *string, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_ServiceCredentials, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[credentialsConst]; ok { mval, err := json.Marshal(val) if err != nil { return nil, fmt.Errorf("failed to marshal secret map for service credentials secret: %w", err) } return mval, nil } return nil, fmt.Errorf("key %s does not exist in secret %s", credentialsConst, *secretName) } func getUsernamePasswordSecret(ibm *providerIBM, secretName *string, ref esv1beta1.ExternalSecretDataRemoteRef, secretGroupName string) ([]byte, error) { response, err := getSecretData(ibm, secretName, sm.Secret_SecretType_UsernamePassword, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if val, ok := secMap[ref.Property]; ok { return []byte(val.(string)), nil } return nil, fmt.Errorf("key %s does not exist in secret %s", ref.Property, ref.Key) } // Returns a secret of type kv and supports json path. func getKVSecret(ref esv1beta1.ExternalSecretDataRemoteRef, secret *sm.KVSecret) ([]byte, error) { payloadJSONByte, err := json.Marshal(secret.Data) if err != nil { return nil, fmt.Errorf("marshaling payload from secret failed. %w", err) } payloadJSON := string(payloadJSONByte) // no property requested, return the entire payload if ref.Property == "" { return []byte(payloadJSON), nil } // returns the requested key // consider that the key contains a ".". this could be one of 2 options // a) "." is part of the key name // b) "." is symbole for JSON path if ref.Property != "" { refProperty := ref.Property // a) "." is part the key name // escape "." idx := strings.Index(refProperty, ".") if idx > 0 { refProperty = strings.ReplaceAll(refProperty, ".", "\\.") val := gjson.Get(payloadJSON, refProperty) if val.Exists() { return []byte(val.String()), nil } } // b) "." is symbole for JSON path // try to get value for this path val := gjson.Get(payloadJSON, ref.Property) if !val.Exists() { return nil, fmt.Errorf("key %s does not exist in secret %s", ref.Property, ref.Key) } return []byte(val.String()), nil } return nil, fmt.Errorf("no property provided for secret %s", ref.Key) } func getSecretData(ibm *providerIBM, secretName *string, secretType, secretGroupName string) (sm.SecretIntf, error) { _, err := uuid.Parse(*secretName) if err != nil { // secret name has been provided instead of id if secretGroupName == "" { // secret group name is not provided return nil, fmt.Errorf("failed to fetch the secret, secret group name is missing") } // secret group name is provided along with secret name, // follow the new mechanism by calling GetSecretByNameTypeWithContext ctx, cancel := context.WithTimeout(context.Background(), contextTimeout) defer cancel() response, _, err := ibm.IBMClient.GetSecretByNameTypeWithContext( ctx, &sm.GetSecretByNameTypeOptions{ Name: secretName, SecretGroupName: &secretGroupName, SecretType: &secretType, }) metrics.ObserveAPICall(constants.ProviderIBMSM, constants.CallIBMSMGetSecretByNameType, err) if err != nil { return nil, err } return response, nil } ctx, cancel := context.WithTimeout(context.Background(), contextTimeout) defer cancel() response, _, err := ibm.IBMClient.GetSecretWithContext( ctx, &sm.GetSecretOptions{ ID: secretName, }) metrics.ObserveAPICall(constants.ProviderIBMSM, constants.CallIBMSMGetSecret, err) if err != nil { return nil, err } return response, nil } func (ibm *providerIBM) GetSecretMap(_ context.Context, ref esv1beta1.ExternalSecretDataRemoteRef) (map[string][]byte, error) { if utils.IsNil(ibm.IBMClient) { return nil, fmt.Errorf(errUninitalizedIBMProvider) } var secretGroupName string secretType := sm.Secret_SecretType_Arbitrary secretName := ref.Key nameSplitted := strings.Split(secretName, "/") switch len(nameSplitted) { case 2: secretType = nameSplitted[0] secretName = nameSplitted[1] case 3: secretGroupName = nameSplitted[0] secretType = nameSplitted[1] secretName = nameSplitted[2] } secretMap := make(map[string][]byte) secMapBytes := make(map[string][]byte) response, err := getSecretData(ibm, &secretName, secretType, secretGroupName) if err != nil { return nil, err } secMap, err := formSecretMap(response) if err != nil { return nil, err } if ref.MetadataPolicy == esv1beta1.ExternalSecretMetadataPolicyFetch { secretMap = populateSecretMap(secretMap, secMap) } secMapBytes = populateSecretMap(secMapBytes, secMap) checkNilFn := func(propertyList []string) error { for _, prop := range propertyList { if _, ok := secMap[prop]; !ok { return fmt.Errorf("key %s does not exist in secret %s", prop, secretName) } } return nil } switch secretType { case sm.Secret_SecretType_Arbitrary: if err := checkNilFn([]string{payloadConst}); err != nil { return nil, err } secretMap[arbitraryConst] = secMapBytes[payloadConst] return secretMap, nil case sm.Secret_SecretType_UsernamePassword: if err := checkNilFn([]string{usernameConst, passwordConst}); err != nil { return nil, err } secretMap[usernameConst] = secMapBytes[usernameConst] secretMap[passwordConst] = secMapBytes[passwordConst] return secretMap, nil case sm.Secret_SecretType_IamCredentials: if err := checkNilFn([]string{smAPIKeyConst}); err != nil { return nil, err } secretMap[apikeyConst] = secMapBytes[smAPIKeyConst] return secretMap, nil case sm.Secret_SecretType_ServiceCredentials: if err := checkNilFn([]string{credentialsConst}); err != nil { return nil, err } secretMap[credentialsConst] = secMapBytes[credentialsConst] return secretMap, nil case sm.Secret_SecretType_ImportedCert: if err := checkNilFn([]string{certificateConst, intermediateConst}); err != nil { return nil, err } secretMap[certificateConst] = secMapBytes[certificateConst] secretMap[intermediateConst] = secMapBytes[intermediateConst] if v, ok := secMapBytes[privateKeyConst]; ok { secretMap[privateKeyConst] = v } else { fmt.Printf("warn: %s is empty for secret %s\n", privateKeyConst, secretName) secretMap[privateKeyConst] = []byte("") } return secretMap, nil case sm.Secret_SecretType_PublicCert: if err := checkNilFn([]string{certificateConst, intermediateConst, privateKeyConst}); err != nil { return nil, err } secretMap[certificateConst] = secMapBytes[certificateConst] secretMap[intermediateConst] = secMapBytes[intermediateConst] secretMap[privateKeyConst] = secMapBytes[privateKeyConst] return secretMap, nil case sm.Secret_SecretType_PrivateCert: if err := checkNilFn([]string{certificateConst, privateKeyConst}); err != nil { return nil, err } secretMap[certificateConst] = secMapBytes[certificateConst] secretMap[privateKeyConst] = secMapBytes[privateKeyConst] return secretMap, nil case sm.Secret_SecretType_Kv: secretData, ok := response.(*sm.KVSecret) if !ok { return nil, fmt.Errorf(errExtractingSecret, secretName, sm.Secret_SecretType_Kv, "GetSecretMap") } secret, err := getKVSecret(ref, secretData) if err != nil { return nil, err } m := make(map[string]interface{}) err = json.Unmarshal(secret, &m) if err != nil { return nil, fmt.Errorf(errJSONSecretUnmarshal, err) } secretMap = byteArrayMap(m, secretMap) return secretMap, nil default: return nil, fmt.Errorf("unknown secret type %s", secretType) } } func byteArrayMap(secretData map[string]interface{}, secretMap map[string][]byte) map[string][]byte { var err error for k, v := range secretData { secretMap[k], err = utils.GetByteValue(v) if err != nil { return nil } } return secretMap } func (ibm *providerIBM) Close(_ context.Context) error { return nil } func (ibm *providerIBM) Validate() (esv1beta1.ValidationResult, error) { return esv1beta1.ValidationResultReady, nil } func (ibm *providerIBM) ValidateStore(store esv1beta1.GenericStore) (admission.Warnings, error) { storeSpec := store.GetSpec() ibmSpec := storeSpec.Provider.IBM if ibmSpec.ServiceURL == nil { return nil, fmt.Errorf("serviceURL is required") } containerRef := ibmSpec.Auth.ContainerAuth secretRef := ibmSpec.Auth.SecretRef missingContainerRef := utils.IsNil(containerRef) missingSecretRef := utils.IsNil(secretRef) if missingContainerRef == missingSecretRef { // since both are equal, if one is missing assume both are missing if missingContainerRef { return nil, fmt.Errorf("missing auth method") } return nil, fmt.Errorf("too many auth methods defined") } if !missingContainerRef { // catch undefined container auth profile if containerRef.Profile == "" { return nil, fmt.Errorf("container auth profile cannot be empty") } // proceed with container auth if containerRef.TokenLocation == "" { containerRef.TokenLocation = "/var/run/secrets/tokens/vault-token" } if _, err := os.Open(containerRef.TokenLocation); err != nil { return nil, fmt.Errorf("cannot read container auth token %s. %w", containerRef.TokenLocation, err) } return nil, nil } // proceed with API Key Auth validation secretKeyRef := secretRef.SecretAPIKey err := utils.ValidateSecretSelector(store, secretKeyRef) if err != nil { return nil, err } if secretKeyRef.Name == "" { return nil, fmt.Errorf("secretAPIKey.name cannot be empty") } if secretKeyRef.Key == "" { return nil, fmt.Errorf("secretAPIKey.key cannot be empty") } return nil, nil } // Capabilities return the provider supported capabilities (ReadOnly, WriteOnly, ReadWrite). func (ibm *providerIBM) Capabilities() esv1beta1.SecretStoreCapabilities { return esv1beta1.SecretStoreReadOnly } func (ibm *providerIBM) NewClient(ctx context.Context, store esv1beta1.GenericStore, kube kclient.Client, namespace string) (esv1beta1.SecretsClient, error) { storeSpec := store.GetSpec() ibmSpec := storeSpec.Provider.IBM iStore := &client{ kube: kube, store: ibmSpec, namespace: namespace, storeKind: store.GetObjectKind().GroupVersionKind().Kind, } var err error var secretsManager *sm.SecretsManagerV2 containerAuth := iStore.store.Auth.ContainerAuth if !utils.IsNil(containerAuth) && containerAuth.Profile != "" { // container-based auth containerAuthProfile := iStore.store.Auth.ContainerAuth.Profile containerAuthToken := iStore.store.Auth.ContainerAuth.TokenLocation containerAuthEndpoint := iStore.store.Auth.ContainerAuth.IAMEndpoint if containerAuthToken == "" { // API default path containerAuthToken = "/var/run/secrets/tokens/vault-token" } if containerAuthEndpoint == "" { // API default path containerAuthEndpoint = "https://iam.cloud.ibm.com" } authenticator, err := core.NewContainerAuthenticatorBuilder(). SetIAMProfileName(containerAuthProfile). SetCRTokenFilename(containerAuthToken). SetURL(containerAuthEndpoint). Build() if err != nil { return nil, fmt.Errorf(errIBMClient, err) } secretsManager, err = sm.NewSecretsManagerV2(&sm.SecretsManagerV2Options{ URL: *storeSpec.Provider.IBM.ServiceURL, Authenticator: authenticator, }) if err != nil { return nil, fmt.Errorf(errIBMClient, err) } } else { // API Key-based auth if err := iStore.setAuth(ctx); err != nil { return nil, err } secretsManager, err = sm.NewSecretsManagerV2(&sm.SecretsManagerV2Options{ URL: *storeSpec.Provider.IBM.ServiceURL, Authenticator: &core.IamAuthenticator{ ApiKey: string(iStore.credentials), }, }) } // Setup retry options, but only if present if storeSpec.RetrySettings != nil { var retryAmount int var retryDuration time.Duration if storeSpec.RetrySettings.MaxRetries != nil { retryAmount = int(*storeSpec.RetrySettings.MaxRetries) } else { retryAmount = 3 } if storeSpec.RetrySettings.RetryInterval != nil { retryDuration, err = time.ParseDuration(*storeSpec.RetrySettings.RetryInterval) } else { retryDuration = 5 * time.Second } if err == nil { secretsManager.Service.EnableRetries(retryAmount, retryDuration) } } if err != nil { return nil, fmt.Errorf(errIBMClient, err) } ibm.IBMClient = secretsManager return ibm, nil } func init() { esv1beta1.Register(&providerIBM{}, &esv1beta1.SecretStoreProvider{ IBM: &esv1beta1.IBMProvider{}, }) } // populateSecretMap populates the secretMap with metadata information that is pulled from IBM provider. func populateSecretMap(secretMap map[string][]byte, secretDataMap map[string]interface{}) map[string][]byte { for key, value := range secretDataMap { secretMap[key] = []byte(fmt.Sprintf("%v", value)) } return secretMap } func formSecretMap(secretData interface{}) (map[string]interface{}, error) { secretDataMap := make(map[string]interface{}) data, err := json.Marshal(secretData) if err != nil { return nil, fmt.Errorf(errJSONSecretMarshal, err) } if err := json.Unmarshal(data, &secretDataMap); err != nil { return nil, fmt.Errorf(errJSONSecretUnmarshal, err) } return secretDataMap, nil }