95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package docker
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import (
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"encoding/base64"
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"fmt"
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"log"
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"regexp"
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"strings"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
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"github.com/aws/aws-sdk-go/aws/ec2metadata"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/ecr"
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)
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type AwsAccessConfig struct {
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AccessKey string `mapstructure:"aws_access_key"`
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SecretKey string `mapstructure:"aws_secret_key"`
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Token string `mapstructure:"aws_token"`
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}
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// Config returns a valid aws.Config object for access to AWS services, or
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// an error if the authentication and region couldn't be resolved
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func (c *AwsAccessConfig) config(region string) (*aws.Config, error) {
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var creds *credentials.Credentials
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config := aws.NewConfig().WithRegion(region).WithMaxRetries(11)
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session, err := session.NewSession(config)
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if err != nil {
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return nil, err
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}
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creds = credentials.NewChainCredentials([]credentials.Provider{
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&credentials.StaticProvider{Value: credentials.Value{
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AccessKeyID: c.AccessKey,
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SecretAccessKey: c.SecretKey,
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SessionToken: c.Token,
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}},
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&credentials.EnvProvider{},
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&credentials.SharedCredentialsProvider{Filename: "", Profile: ""},
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&ec2rolecreds.EC2RoleProvider{
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Client: ec2metadata.New(session),
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},
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})
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return config.WithCredentials(creds), nil
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}
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// Get a login token for Amazon AWS ECR. Returns username and password
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// or an error.
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func (c *AwsAccessConfig) EcrGetLogin(ecrUrl string) (string, string, error) {
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exp := regexp.MustCompile(`(?:http://|https://|)([0-9]*)\.dkr\.ecr\.(.*)\.amazonaws\.com.*`)
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splitUrl := exp.FindStringSubmatch(ecrUrl)
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if len(splitUrl) != 3 {
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return "", "", fmt.Errorf("Failed to parse the ECR URL: %s it should be on the form <account number>.dkr.ecr.<region>.amazonaws.com", ecrUrl)
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}
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accountId := splitUrl[1]
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region := splitUrl[2]
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log.Println(fmt.Sprintf("Getting ECR token for account: %s in %s..", accountId, region))
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awsConfig, err := c.config(region)
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if err != nil {
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return "", "", err
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}
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session, err := session.NewSession(awsConfig)
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if err != nil {
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return "", "", fmt.Errorf("failed to create session: %s", err)
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}
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service := ecr.New(session)
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params := &ecr.GetAuthorizationTokenInput{
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RegistryIds: []*string{
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aws.String(accountId),
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},
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}
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resp, err := service.GetAuthorizationToken(params)
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if err != nil {
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return "", "", fmt.Errorf(err.Error())
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}
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auth, err := base64.StdEncoding.DecodeString(*resp.AuthorizationData[0].AuthorizationToken)
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if err != nil {
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return "", "", fmt.Errorf("Error decoding ECR AuthorizationToken: %s", err)
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}
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authParts := strings.SplitN(string(auth), ":", 2)
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log.Printf("Successfully got login for ECR: %s", ecrUrl)
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return authParts[0], authParts[1], nil
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}
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