Python Java com interceptor Java sem interceptor Node.js Golang - GRPC

SIGv4solicitações autenticadas para o Amazon VPC Lattice

VPCO Lattice usa Signature Version 4 (SIGv4) ou Signature Version 4A (SIGv4A) para autenticação do cliente. Para obter mais informações, consulte AWS Signature versão 4 para API solicitações no Guia IAM do usuário.

Considerações

VPCO Lattice tenta autenticar qualquer solicitação assinada com SIGv4 ou. SIGv4A Solicitações sem autenticação falharão.
VPCO Lattice não oferece suporte à assinatura de carga útil. Você deve enviar um cabeçalho x-amz-content-sha256 com o valor definido como "UNSIGNED-PAYLOAD".

Python

Este exemplo envia as solicitações assinadas por meio de uma conexão segura com um serviço registrado na rede. Se você preferir usar solicitações, o pacote botocore simplifica o processo de autenticação, mas não é estritamente obrigatório. Para obter mais informações, consulte Credenciais na documentação do Boto3.

Para instalar os awscrt pacotes botocore e, use o comando a seguir. Para obter mais informações, consulte AWS CRTPython.


pip install botocore awscrt

Se você executar o aplicativo cliente no Lambda, instale os módulos necessários usando camadas do Lambda ou inclua-os em seu pacote de implantação.

No exemplo a seguir, substitua os valores do espaço reservado pelos seus próprios valores.

Java com interceptor

Este exemplo usa o Amazon Request Signing Interceptor para processar a assinatura de solicitações.


import com.amazonaws.http.AwsRequestSigningApacheInterceptor;
import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
import software.amazon.awssdk.auth.signer.Aws4UnsignedPayloadSigner;
import software.amazon.awssdk.regions.Region;

import java.nio.charset.StandardCharsets;

import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class App {
    public static void main(String[] args) {
      var interceptor = new AwsRequestSigningApacheInterceptor(
          "vpc-lattice-svcs",
          Aws4UnsignedPayloadSigner.create(), // requires HTTPS
          DefaultCredentialsProvider.create(),
          Region.US_WEST_2.id()
          );
      CloseableHttpClient client = HttpClients.custom()
        .addInterceptorLast(interceptor)
        .build();

      var httpPost = new HttpPost("https://user-02222f67d3a427111.1234abc.vpc-lattice-svcs.us-west-2.on.aws/create");
      httpPost.addHeader("content-type", "application/json");

      var body = """
      {
        "name": "Jane Doe",
        "job": "Engineer"
      }
      """;
      httpPost.setEntity(new ByteArrayEntity(body.getBytes(StandardCharsets.UTF_8)));

      try (var response = client.execute(httpPost)) {
        System.out.println(new String(response.getEntity().getContent().readAllBytes()));
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
}

Java sem interceptor

Este exemplo mostra como você pode realizar a assinatura de solicitações usando interceptores personalizados. Ele usa a classe de provedor de credenciais padrão do AWS SDK for Java 2.x, que obtém as credenciais corretas para você. Se você preferir usar um provedor de credenciais específico, você pode selecionar um no AWS SDK for Java 2.x. O AWS SDK for Java permite que somente cargas não assinadas sejam transferidas. HTTPS No entanto, você pode estender o signatário para suportar cargas não assinadas. HTTP


import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
import software.amazon.awssdk.auth.signer.Aws4UnsignedPayloadSigner;
import software.amazon.awssdk.auth.signer.AwsSignerExecutionAttribute;
import software.amazon.awssdk.core.interceptor.ExecutionAttributes;
import software.amazon.awssdk.http.SdkHttpFullRequest;
import software.amazon.awssdk.http.SdkHttpMethod;
import software.amazon.awssdk.regions.Region;

import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class App {

    public static void main(String[] args) {
        var signer = Aws4UnsignedPayloadSigner.create(); // requires HTTPS

        Map<String, String> headers = new HashMap<>();
        headers.put("content-type", "application/json");
        var body = """
        {
            "name": "Jane Doe",
            "job": "Engineer"
        }
        """;

        String endpoint = "https://user-02222f67d3a427111.1234abc.vpc-lattice-svcs.us-west-2.on.aws/create";

        var sdkRequest = SdkHttpFullRequest.builder().method(SdkHttpMethod.POST);

        sdkRequest.host("user-02222f67d3a427111.1234abc.vpc-lattice-svcs.us-west-2.on.aws");
        sdkRequest.protocol("HTTPS");
        sdkRequest.encodedPath("/create");
        sdkRequest.contentStreamProvider(() -> new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8)));


        for (Map.Entry<String, String> header : headers.entrySet()) {
            sdkRequest.putHeader(header.getKey(), header.getValue());
        }

        ExecutionAttributes attributes = ExecutionAttributes.builder()
                .put(AwsSignerExecutionAttribute.AWS_CREDENTIALS, DefaultCredentialsProvider.create().resolveCredentials())
                .put(AwsSignerExecutionAttribute.SERVICE_SIGNING_NAME, "vpc-lattice-svcs")
                .put(AwsSignerExecutionAttribute.SIGNING_REGION, Region.US_WEST_2)
                .build();

        SdkHttpFullRequest prepRequest = signer.sign(sdkRequest.build(), attributes);

        HttpPost httpPost = new HttpPost(endpoint);
        for (Map.Entry<String, List<String>> header : prepRequest.headers().entrySet()) {
            if (header.getKey().equalsIgnoreCase("host")) { continue; }
            for(var value : header.getValue()) {
                httpPost.addHeader(header.getKey(), value);
            }
        }

        CloseableHttpClient client = HttpClients.custom().build();

        httpPost.setEntity(new ByteArrayEntity(body.getBytes(StandardCharsets.UTF_8)));

        try (var response = client.execute(httpPost)){
            System.out.println(new String(response.getEntity().getContent().readAllBytes()));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

Node.js

Este exemplo usa associações NodeJS aws-crt para enviar uma solicitação assinada usando. HTTPS

Para instalar o pacote aws-crt, execute o comando a seguir.


npm -i aws-crt

Se a variável de ambiente AWS_REGION existir, o exemplo usará a região especificada por AWS_REGION. A região padrão é us-east-1.

SIGv4


const https = require('https')
const crt = require('aws-crt')
const { HttpRequest } = require('aws-crt/dist/native/http')

function sigV4Sign(method, endpoint, service, algorithm) {
    const host = new URL(endpoint).host
    const request = new HttpRequest(method, endpoint)
    request.headers.add('host', host)
    // crt.io.enable_logging(crt.io.LogLevel.INFO)
    const config = {
        service: service,
        region: process.env.AWS_REGION ? process.env.AWS_REGION : 'us-east-1',
        algorithm: algorithm,
        signature_type: crt.auth.AwsSignatureType.HttpRequestViaHeaders,
        signed_body_header: crt.auth.AwsSignedBodyHeaderType.XAmzContentSha256,
        signed_body_value: crt.auth.AwsSignedBodyValue.UnsignedPayload,
        provider: crt.auth.AwsCredentialsProvider.newDefault()
    }

    return crt.auth.aws_sign_request(request, config)
}

if (process.argv.length === 2) {
  console.error(process.argv[1] + ' <url>')
  process.exit(1)
}

const algorithm = crt.auth.AwsSigningAlgorithm.SigV4;

sigV4Sign('GET', process.argv[2], 'vpc-lattice-svcs').then(
  httpResponse => {
    var headers = {}

    for (const sigv4header of httpResponse.headers) {
      headers[sigv4header[0]] = sigv4header[1]
    }

    const options = {
      hostname: new URL(process.argv[2]).host,
      path: new URL(process.argv[2]).pathname,
      method: 'GET',
      headers: headers
    }

    req = https.request(options, res => {
      console.log('statusCode:', res.statusCode)
      console.log('headers:', res.headers)
      res.on('data', d => {
        process.stdout.write(d)
      })
    })
    req.on('error', err => {
      console.log('Error: ' + err)
    })
    req.end()
  }
)

SIGv4A


const https = require('https')
const crt = require('aws-crt')
const { HttpRequest } = require('aws-crt/dist/native/http')

function sigV4Sign(method, endpoint, service, algorithm) {
    const host = new URL(endpoint).host
    const request = new HttpRequest(method, endpoint)
    request.headers.add('host', host)
    // crt.io.enable_logging(crt.io.LogLevel.INFO)
    const config = {
        service: service,
        region: process.env.AWS_REGION ? process.env.AWS_REGION : 'us-east-1',
        algorithm: algorithm,
        signature_type: crt.auth.AwsSignatureType.HttpRequestViaHeaders,
        signed_body_header: crt.auth.AwsSignedBodyHeaderType.XAmzContentSha256,
        signed_body_value: crt.auth.AwsSignedBodyValue.UnsignedPayload,
        provider: crt.auth.AwsCredentialsProvider.newDefault()
    }

    return crt.auth.aws_sign_request(request, config)
}

if (process.argv.length === 2) {
  console.error(process.argv[1] + ' <url>')
  process.exit(1)
}

const algorithm = crt.auth.AwsSigningAlgorithm.SigV4Asymmetric;

sigV4Sign('GET', process.argv[2], 'vpc-lattice-svcs').then(
  httpResponse => {
    var headers = {}

    for (const sigv4header of httpResponse.headers) {
      headers[sigv4header[0]] = sigv4header[1]
    }

    const options = {
      hostname: new URL(process.argv[2]).host,
      path: new URL(process.argv[2]).pathname,
      method: 'GET',
      headers: headers
    }

    req = https.request(options, res => {
      console.log('statusCode:', res.statusCode)
      console.log('headers:', res.headers)
      res.on('data', d => {
        process.stdout.write(d)
      })
    })
    req.on('error', err => {
      console.log('Error: ' + err)
    })
    req.end()
  }
)

Golang - GRPC

Este exemplo usa a linguagem de programação AWS SDK for the Go para lidar com a assinatura de GRPC solicitações. Isso pode ser usado com o servidor echo do repositório de código de GRPC amostra.


package main

import (
    "context"
    "crypto/tls"
    "crypto/x509"

    "flag"
    "fmt"
    "log"
    "net/http"
    "net/url"
    "strings"
    "time"

    "google.golang.org/grpc"
    "google.golang.org/grpc/credentials"

    "github.com/aws/aws-sdk-go-v2/aws"
    v4 "github.com/aws/aws-sdk-go-v2/aws/signer/v4"
    "github.com/aws/aws-sdk-go-v2/config"

    ecpb "google.golang.org/grpc/examples/features/proto/echo"
)

const (
    headerContentSha    = "x-amz-content-sha256"
    headerSecurityToken = "x-amz-security-token"
    headerDate          = "x-amz-date"
    headerAuthorization = "authorization"
    unsignedPayload     = "UNSIGNED-PAYLOAD"
)

type SigV4GrpcSigner struct {
    service      string
    region       string
    credProvider aws.CredentialsProvider
    signer       *v4.Signer
}

func NewSigV4GrpcSigner(service string, region string, credProvider aws.CredentialsProvider) *SigV4GrpcSigner {
    signer := v4.NewSigner()
    return &SigV4GrpcSigner{
        service:      service,
        region:       region,
        credProvider: credProvider,
        signer:       signer,
    }
}

func (s *SigV4GrpcSigner) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
    ri, _ := credentials.RequestInfoFromContext(ctx)
    creds, err := s.credProvider.Retrieve(ctx)
    if err != nil {
        return nil, fmt.Errorf("failed to load credentials: %w", err)
    }

    // The URI we get here is scheme://authority/service/ - for siging we want to include the RPC name
    // But RequestInfoFromContext only has the combined /service/rpc-name - so read the URI, and
    // replace the Path with what we get from RequestInfo.
    parsed, err := url.Parse(uri[0])
    if err != nil {
        return nil, err
    }
    parsed.Path = ri.Method

    // Build a request for the signer.
    bodyReader := strings.NewReader("")
    req, err := http.NewRequest("POST", uri[0], bodyReader)
    if err != nil {
        return nil, err
    }
    date := time.Now()
    req.Header.Set(headerContentSha, unsignedPayload)
    req.Header.Set(headerDate, date.String())
    if creds.SessionToken != "" {
        req.Header.Set(headerSecurityToken, creds.SessionToken)
    }
    // The signer wants this as //authority/path
    // So get this by triming off the scheme and the colon before the first slash.
    req.URL.Opaque = strings.TrimPrefix(parsed.String(), parsed.Scheme+":")

    err = s.signer.SignHTTP(context.Background(), creds, req, unsignedPayload, s.service, s.region, date)
    if err != nil {
        return nil, fmt.Errorf("failed to sign request: %w", err)
    }

    // Pull the relevant headers out of the signer, and return them to get
    // included in the request we make.
    reqHeaders := map[string]string{
        headerContentSha:    req.Header.Get(headerContentSha),
        headerDate:          req.Header.Get(headerDate),
        headerAuthorization: req.Header.Get(headerAuthorization),
    }
    if req.Header.Get(headerSecurityToken) != "" {
        reqHeaders[headerSecurityToken] = req.Header.Get(headerSecurityToken)
    }

    return reqHeaders, nil
}

func (c *SigV4GrpcSigner) RequireTransportSecurity() bool {
    return true
}

var addr = flag.String("addr", "some-lattice-service:443", "the address to connect to")
var region = flag.String("region", "us-west-2", "region")

func callUnaryEcho(client ecpb.EchoClient, message string) {
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
    defer cancel()
    resp, err := client.UnaryEcho(ctx, &ecpb.EchoRequest{Message: message})
    if err != nil {
        log.Fatalf("client.UnaryEcho(_) = _, %v: ", err)
    }
    fmt.Println("UnaryEcho: ", resp.Message)
}

func main() {
    flag.Parse()
    cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithClientLogMode(aws.LogSigning))
    if err != nil {
        log.Fatalf("failed to load SDK configuration, %v", err)
    }

    pool, _ := x509.SystemCertPool()
    tlsConfig := &tls.Config{
        RootCAs: pool,
    }

    authority, _, _ := strings.Cut(*addr, ":") // Remove the port from the addr
    opts := []grpc.DialOption{
        grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig)),

        // Lattice needs both the Authority to be set (without a port), and the SigV4 signer
        grpc.WithAuthority(authority),
        grpc.WithPerRPCCredentials(NewSigV4GrpcSigner("vpc-lattice-svcs", *region, cfg.Credentials)),
    }

    conn, err := grpc.Dial(*addr, opts...)

    if err != nil {
        log.Fatalf("did not connect: %v", err)
    }
    defer conn.Close()
    rgc := ecpb.NewEchoClient(conn)

    callUnaryEcho(rgc, "hello world")
}

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