forked from TrueCloudLab/lego
77 lines
2 KiB
Go
77 lines
2 KiB
Go
// Package s3 implements an HTTP provider for solving the HTTP-01 challenge using AWS S3.
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package s3
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import (
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"bytes"
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"context"
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"fmt"
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"strings"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/config"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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"github.com/go-acme/lego/v4/challenge/http01"
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)
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// HTTPProvider implements ChallengeProvider for `http-01` challenge.
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type HTTPProvider struct {
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bucket string
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client *s3.Client
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}
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// NewHTTPProvider returns a HTTPProvider instance with a configured s3 bucket and aws session.
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// Credentials must be passed in the environment variables.
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func NewHTTPProvider(bucket string) (*HTTPProvider, error) {
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if bucket == "" {
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return nil, fmt.Errorf("s3: bucket name missing")
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}
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ctx := context.Background()
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cfg, err := config.LoadDefaultConfig(ctx)
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if err != nil {
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return nil, fmt.Errorf("s3: unable to create AWS config: %w", err)
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}
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client := s3.NewFromConfig(cfg)
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return &HTTPProvider{
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bucket: bucket,
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client: client,
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}, nil
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}
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// Present makes the token available at `HTTP01ChallengePath(token)` by creating a file in the given s3 bucket.
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func (s *HTTPProvider) Present(domain, token, keyAuth string) error {
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ctx := context.Background()
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params := &s3.PutObjectInput{
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ACL: "public-read",
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Bucket: aws.String(s.bucket),
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Key: aws.String(strings.Trim(http01.ChallengePath(token), "/")),
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Body: bytes.NewReader([]byte(keyAuth)),
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}
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_, err := s.client.PutObject(ctx, params)
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if err != nil {
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return fmt.Errorf("s3: failed to upload token to s3: %w", err)
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}
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return nil
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}
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// CleanUp removes the file created for the challenge.
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func (s *HTTPProvider) CleanUp(domain, token, keyAuth string) error {
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ctx := context.Background()
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params := &s3.DeleteObjectInput{
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Bucket: aws.String(s.bucket),
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Key: aws.String(strings.Trim(http01.ChallengePath(token), "/")),
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}
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_, err := s.client.DeleteObject(ctx, params)
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if err != nil {
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return fmt.Errorf("s3: could not remove file in s3 bucket after HTTP challenge: %w", err)
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}
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return nil
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}
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