150 lines
5.0 KiB
Go
150 lines
5.0 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kafka
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"errors"
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"fmt"
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"time"
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"github.com/IBM/sarama"
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"github.com/aws/aws-msk-iam-sasl-signer-go/signer"
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aws2 "github.com/aws/aws-sdk-go-v2/aws"
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)
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func updatePasswordAuthInfo(config *sarama.Config, metadata *KafkaMetadata, saslUsername, saslPassword string) {
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config.Net.SASL.Enable = true
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config.Net.SASL.User = saslUsername
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config.Net.SASL.Password = saslPassword
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if metadata.SaslMechanism == "SHA-256" {
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config.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: SHA256} }
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config.Net.SASL.Mechanism = sarama.SASLTypeSCRAMSHA256
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} else if metadata.SaslMechanism == "SHA-512" {
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config.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: SHA512} }
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config.Net.SASL.Mechanism = sarama.SASLTypeSCRAMSHA512
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} else {
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config.Net.SASL.Mechanism = sarama.SASLTypePlaintext
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}
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}
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func updateMTLSAuthInfo(config *sarama.Config, metadata *KafkaMetadata) error {
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if metadata.TLSDisable {
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return fmt.Errorf("kafka: cannot configure mTLS authentication when TLSDisable is 'true'")
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}
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cert, err := tls.X509KeyPair([]byte(metadata.TLSClientCert), []byte(metadata.TLSClientKey))
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if err != nil {
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return fmt.Errorf("unable to load client certificate and key pair. Err: %w", err)
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}
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config.Net.TLS.Config.Certificates = []tls.Certificate{cert}
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return nil
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}
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func updateTLSConfig(config *sarama.Config, metadata *KafkaMetadata) error {
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if metadata.TLSDisable || metadata.AuthType == noAuthType {
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config.Net.TLS.Enable = false
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return nil
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}
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config.Net.TLS.Enable = true
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if !metadata.TLSSkipVerify && metadata.TLSCaCert == "" {
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return nil
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}
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//nolint:gosec
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config.Net.TLS.Config = &tls.Config{InsecureSkipVerify: metadata.TLSSkipVerify, MinVersion: tls.VersionTLS12}
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if metadata.TLSCaCert != "" {
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caCertPool := x509.NewCertPool()
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if ok := caCertPool.AppendCertsFromPEM([]byte(metadata.TLSCaCert)); !ok {
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return errors.New("kafka error: unable to load ca certificate")
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}
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config.Net.TLS.Config.RootCAs = caCertPool
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}
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return nil
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}
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func updateOidcAuthInfo(config *sarama.Config, metadata *KafkaMetadata) error {
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tokenProvider := metadata.getOAuthTokenSource()
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if metadata.TLSCaCert != "" {
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err := tokenProvider.addCa(metadata.TLSCaCert)
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if err != nil {
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return fmt.Errorf("kafka: error setting oauth client trusted CA: %w", err)
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}
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}
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config.Net.SASL.Enable = true
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config.Net.SASL.Mechanism = sarama.SASLTypeOAuth
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config.Net.SASL.TokenProvider = tokenProvider
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return nil
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}
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func updateAWSIAMAuthInfo(ctx context.Context, config *sarama.Config, metadata *KafkaMetadata) error {
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config.Net.SASL.Enable = true
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config.Net.SASL.Mechanism = sarama.SASLTypeOAuth
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config.Net.SASL.TokenProvider = &mskAccessTokenProvider{
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ctx: ctx,
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generateTokenTimeout: 10 * time.Second,
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region: metadata.AWSRegion,
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accessKey: metadata.AWSAccessKey,
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secretKey: metadata.AWSSecretKey,
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sessionToken: metadata.AWSSessionToken,
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awsIamRoleArn: metadata.AWSIamRoleArn,
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awsStsSessionName: metadata.AWSStsSessionName,
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}
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_, err := config.Net.SASL.TokenProvider.Token()
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if err != nil {
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return fmt.Errorf("error validating iam credentials %v", err)
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}
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return nil
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}
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type mskAccessTokenProvider struct {
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ctx context.Context
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generateTokenTimeout time.Duration
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accessKey string
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secretKey string
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sessionToken string
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awsIamRoleArn string
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awsStsSessionName string
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region string
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}
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func (m *mskAccessTokenProvider) Token() (*sarama.AccessToken, error) {
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// this function can't use the context passed on Init because that context would be cancelled right after Init
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ctx, cancel := context.WithTimeout(m.ctx, m.generateTokenTimeout)
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defer cancel()
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if m.accessKey != "" && m.secretKey != "" {
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token, _, err := signer.GenerateAuthTokenFromCredentialsProvider(ctx, m.region, aws2.CredentialsProviderFunc(func(ctx context.Context) (aws2.Credentials, error) {
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return aws2.Credentials{
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AccessKeyID: m.accessKey,
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SecretAccessKey: m.secretKey,
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SessionToken: m.sessionToken,
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}, nil
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}))
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return &sarama.AccessToken{Token: token}, err
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} else if m.awsIamRoleArn != "" {
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token, _, err := signer.GenerateAuthTokenFromRole(ctx, m.region, m.awsIamRoleArn, m.awsStsSessionName)
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return &sarama.AccessToken{Token: token}, err
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}
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token, _, err := signer.GenerateAuthToken(ctx, m.region)
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return &sarama.AccessToken{Token: token}, err
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}
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