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| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "reflect" |
| 6 | + "strings" |
| 7 | + |
| 8 | + "github.com/aws/aws-sdk-go/aws" |
| 9 | + "github.com/aws/aws-sdk-go/aws/credentials" |
| 10 | + "github.com/aws/aws-sdk-go/aws/session" |
| 11 | + "github.com/aws/aws-sdk-go/service/ssm" |
| 12 | +) |
| 13 | + |
| 14 | +type plugin struct{} |
| 15 | + |
| 16 | +var KVSource plugin |
| 17 | + |
| 18 | +type options struct { |
| 19 | + AwsRegion string `alias:"AWS_REGION"` |
| 20 | + AwsAccessKeyID string `alias:"AWS_ACCESS_KEY_ID"` |
| 21 | + AwsSecretAccessKey string `alias:"AWS_SECRET_ACCESS_KEY"` |
| 22 | + AwsSessionToken string `alias:"AWS_SESSION_TOKEN"` |
| 23 | + AwsParameterStorePath string `alias:"AWS_SSM_PATH"` |
| 24 | + |
| 25 | + UppercaseKeys string `alias:"UPPERCASE_KEY"` |
| 26 | +} |
| 27 | + |
| 28 | +func (p plugin) Get(root string, args []string) (map[string]string, error) { |
| 29 | + r := make(map[string]string) |
| 30 | + opts := &options{} |
| 31 | + cfg := &aws.Config{} |
| 32 | + opts.parseArgs(&args) |
| 33 | + |
| 34 | + if opts.AwsParameterStorePath == "" { |
| 35 | + return r, fmt.Errorf("AWS_SSM_PATH is required") |
| 36 | + } |
| 37 | + |
| 38 | + if opts.AwsRegion != "" { |
| 39 | + cfg.Region = aws.String(opts.AwsRegion) |
| 40 | + } |
| 41 | + |
| 42 | + if opts.AwsAccessKeyID != "" && opts.AwsSecretAccessKey != "" { |
| 43 | + staticCreds := credentials.NewStaticCredentials(opts.AwsAccessKeyID, opts.AwsSecretAccessKey, opts.AwsSessionToken) |
| 44 | + cfg.WithCredentials(staticCreds) |
| 45 | + } |
| 46 | + |
| 47 | + sess, err := session.NewSession(cfg) |
| 48 | + if err != nil { |
| 49 | + return nil, err |
| 50 | + } |
| 51 | + |
| 52 | + svc := ssm.New(sess) |
| 53 | + |
| 54 | + getParamsInput := &ssm.GetParametersByPathInput{ |
| 55 | + Path: aws.String(opts.AwsParameterStorePath), |
| 56 | + WithDecryption: aws.Bool(true), |
| 57 | + } |
| 58 | + |
| 59 | + for { |
| 60 | + resp, err := svc.GetParametersByPath(getParamsInput) |
| 61 | + |
| 62 | + if err != nil { |
| 63 | + return nil, err |
| 64 | + } |
| 65 | + |
| 66 | + params := resp.Parameters |
| 67 | + for _, p := range params { |
| 68 | + name := sanitizeKey(p.Name, opts.UppercaseKeys == "true") |
| 69 | + r[name] = sanitizeValue(p.Value) |
| 70 | + } |
| 71 | + |
| 72 | + nextToken := resp.NextToken |
| 73 | + if nextToken == nil { |
| 74 | + break |
| 75 | + } |
| 76 | + } |
| 77 | + |
| 78 | + return r, nil |
| 79 | +} |
| 80 | + |
| 81 | +func sanitizeKey(path *string, ensureUppercase bool) string { |
| 82 | + pathBrokenDown := strings.Split(aws.StringValue(path), "/") |
| 83 | + name := pathBrokenDown[len(pathBrokenDown)-1] |
| 84 | + |
| 85 | + if ensureUppercase { |
| 86 | + name = strings.ToUpper(name) |
| 87 | + } |
| 88 | + |
| 89 | + return name |
| 90 | +} |
| 91 | + |
| 92 | +func sanitizeValue(path *string) string { |
| 93 | + return aws.StringValue(path) |
| 94 | +} |
| 95 | + |
| 96 | +func (opts *options) parseArgs(args *[]string) error { |
| 97 | + ov := reflect.ValueOf(opts).Elem() |
| 98 | + typeOfOpts := ov.Type() |
| 99 | + |
| 100 | + for _, arg := range *args { |
| 101 | + argKeyValuePair := strings.Split(arg, "=") |
| 102 | + if len(argKeyValuePair) == 2 { |
| 103 | + for i := 0; i < ov.NumField(); i++ { |
| 104 | + field := ov.Field(i) |
| 105 | + fieldTag := typeOfOpts.Field(i).Tag |
| 106 | + |
| 107 | + if argKeyValuePair[0] == fieldTag.Get("alias") { |
| 108 | + field.SetString(argKeyValuePair[1]) |
| 109 | + } |
| 110 | + } |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | + return nil |
| 115 | +} |
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