// loadProfiles loads from the file pointed to by shared credentials filename for profile.
// The credentials retrieved from the profile will be returned or error. Error will be
// returned if it fails to read from the file, or the data is invalid.
func loadProfile(filename, profile string) (Value, error) {
config, err := ini.LoadFile(filename)
if err != nil {
return Value{}, awserr.New("SharedCredsLoad", "failed to load shared credentials file", err)
}
iniProfile := config.Section(profile)
id, ok := iniProfile["aws_access_key_id"]
if !ok {
return Value{}, awserr.New("SharedCredsAccessKey",
fmt.Sprintf("shared credentials %s in %s did not contain aws_access_key_id", profile, filename),
nil)
}
secret, ok := iniProfile["aws_secret_access_key"]
if !ok {
return Value{}, awserr.New("SharedCredsSecret",
fmt.Sprintf("shared credentials %s in %s did not contain aws_secret_access_key", profile, filename),
nil)
}
token := iniProfile["aws_session_token"]
return Value{
AccessKeyID: id,
SecretAccessKey: secret,
SessionToken: token,
}, nil
}
func TestAfterRetryRefreshCreds(t *testing.T) {
os.Clearenv()
credProvider := &mockCredsProvider{}
svc := NewService(&aws.Config{Credentials: credentials.NewCredentials(credProvider), MaxRetries: aws.Int(1)})
svc.Handlers.Clear()
svc.Handlers.ValidateResponse.PushBack(func(r *Request) {
r.Error = awserr.New("UnknownError", "", nil)
r.HTTPResponse = &http.Response{StatusCode: 400}
})
svc.Handlers.UnmarshalError.PushBack(func(r *Request) {
r.Error = awserr.New("ExpiredTokenException", "", nil)
})
svc.Handlers.AfterRetry.PushBack(func(r *Request) {
AfterRetryHandler(r)
})
assert.True(t, svc.Config.Credentials.IsExpired(), "Expect to start out expired")
assert.False(t, credProvider.retrieveCalled)
req := NewRequest(svc, &Operation{Name: "Operation"}, nil, nil)
req.Send()
assert.True(t, svc.Config.Credentials.IsExpired())
assert.False(t, credProvider.retrieveCalled)
_, err := svc.Config.Credentials.Get()
assert.NoError(t, err)
assert.True(t, credProvider.retrieveCalled)
}
func TestChainProviderWithNoValidProvider(t *testing.T) {
p := &ChainProvider{
Providers: []Provider{
&stubProvider{err: awserr.New("FirstError", "first provider error", nil)},
&stubProvider{err: awserr.New("SecondError", "second provider error", nil)},
},
}
assert.True(t, p.IsExpired(), "Expect expired with no providers")
_, err := p.Retrieve()
assert.Equal(t, ErrNoValidProvidersFoundInChain, err, "Expect no providers error returned")
}
// SendHandler is a request handler to send service request using HTTP client.
func SendHandler(r *Request) {
var err error
r.HTTPResponse, err = r.Service.Config.HTTPClient.Do(r.HTTPRequest)
if err != nil {
// Capture the case where url.Error is returned for error processing
// response. e.g. 301 without location header comes back as string
// error and r.HTTPResponse is nil. Other url redirect errors will
// comeback in a similar method.
if e, ok := err.(*url.Error); ok {
if s := reStatusCode.FindStringSubmatch(e.Error()); s != nil {
code, _ := strconv.ParseInt(s[1], 10, 64)
r.HTTPResponse = &http.Response{
StatusCode: int(code),
Status: http.StatusText(int(code)),
Body: ioutil.NopCloser(bytes.NewReader([]byte{})),
}
return
}
}
if r.HTTPResponse == nil {
// Add a dummy request response object to ensure the HTTPResponse
// value is consistent.
r.HTTPResponse = &http.Response{
StatusCode: int(0),
Status: http.StatusText(int(0)),
Body: ioutil.NopCloser(bytes.NewReader([]byte{})),
}
}
// Catch all other request errors.
r.Error = awserr.New("RequestError", "send request failed", err)
r.Retryable = aws.Bool(true) // network errors are retryable
}
}
// Retrieve retrieves credentials from the EC2 service.
// Error will be returned if the request fails, or unable to extract
// the desired credentials.
func (m *EC2RoleProvider) Retrieve() (credentials.Value, error) {
if m.Client == nil {
m.Client = ec2metadata.New(nil)
}
credsList, err := requestCredList(m.Client)
if err != nil {
return credentials.Value{}, err
}
if len(credsList) == 0 {
return credentials.Value{}, awserr.New("EmptyEC2RoleList", "empty EC2 Role list", nil)
}
credsName := credsList[0]
roleCreds, err := requestCred(m.Client, credsName)
if err != nil {
return credentials.Value{}, err
}
m.SetExpiration(roleCreds.Expiration, m.ExpiryWindow)
return credentials.Value{
AccessKeyID: roleCreds.AccessKeyID,
SecretAccessKey: roleCreds.SecretAccessKey,
SessionToken: roleCreds.Token,
}, nil
}
func buildQueryString(r *service.Request, v reflect.Value, name string, query url.Values) {
str, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
query.Set(name, *str)
}
}
func buildHeader(r *service.Request, v reflect.Value, name string) {
str, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
r.HTTPRequest.Header.Add(name, *str)
}
}
func unmarshalError(r *service.Request) {
defer r.HTTPResponse.Body.Close()
_, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "unable to unmarshal EC2 metadata error respose", err)
}
// TODO extract the error...
}
// requestCredList requests a list of credentials from the EC2 service.
// If there are no credentials, or there is an error making or receiving the request
func requestCredList(client *ec2metadata.Client) ([]string, error) {
resp, err := client.GetMetadata(iamSecurityCredsPath)
if err != nil {
return nil, awserr.New("EC2RoleRequestError", "failed to list EC2 Roles", err)
}
credsList := []string{}
s := bufio.NewScanner(strings.NewReader(resp))
for s.Scan() {
credsList = append(credsList, s.Text())
}
if err := s.Err(); err != nil {
return nil, awserr.New("SerializationError", "failed to read list of EC2 Roles", err)
}
return credsList, nil
}
func buildHeaderMap(r *service.Request, v reflect.Value, prefix string) {
for _, key := range v.MapKeys() {
str, err := convertType(v.MapIndex(key))
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if str != nil {
r.HTTPRequest.Header.Add(prefix+key.String(), *str)
}
}
}
func unmarshalHandler(r *service.Request) {
defer r.HTTPResponse.Body.Close()
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "unable to unmarshal EC2 metadata respose", err)
}
data := r.Data.(*metadataOutput)
data.Content = string(b)
}
func buildURI(r *service.Request, v reflect.Value, name string) {
value, err := convertType(v)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to encode REST request", err)
} else if value != nil {
uri := r.HTTPRequest.URL.Path
uri = strings.Replace(uri, "{"+name+"}", EscapePath(*value, true), -1)
uri = strings.Replace(uri, "{"+name+"+}", EscapePath(*value, false), -1)
r.HTTPRequest.URL.Path = uri
}
}
// ValidateParameters is a request handler to validate the input parameters.
// Validating parameters only has meaning if done prior to the request being sent.
func ValidateParameters(r *Request) {
if r.ParamsFilled() {
v := validator{errors: []string{}}
v.validateAny(reflect.ValueOf(r.Params), "")
if count := len(v.errors); count > 0 {
format := "%d validation errors:\n- %s"
msg := fmt.Sprintf(format, count, strings.Join(v.errors, "\n- "))
r.Error = awserr.New("InvalidParameter", msg, nil)
}
}
}
func TestChainProviderGet(t *testing.T) {
p := &ChainProvider{
Providers: []Provider{
&stubProvider{err: awserr.New("FirstError", "first provider error", nil)},
&stubProvider{err: awserr.New("SecondError", "second provider error", nil)},
&stubProvider{
creds: Value{
AccessKeyID: "AKID",
SecretAccessKey: "SECRET",
SessionToken: "",
},
},
},
}
creds, err := p.Retrieve()
assert.Nil(t, err, "Expect no error")
assert.Equal(t, "AKID", creds.AccessKeyID, "Expect access key ID to match")
assert.Equal(t, "SECRET", creds.SecretAccessKey, "Expect secret access key to match")
assert.Empty(t, creds.SessionToken, "Expect session token to be empty")
}
func unmarshalBody(r *service.Request, v reflect.Value) {
if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
if payloadName := field.Tag.Get("payload"); payloadName != "" {
pfield, _ := v.Type().FieldByName(payloadName)
if ptag := pfield.Tag.Get("type"); ptag != "" && ptag != "structure" {
payload := v.FieldByName(payloadName)
if payload.IsValid() {
switch payload.Interface().(type) {
case []byte:
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
} else {
payload.Set(reflect.ValueOf(b))
}
case *string:
b, err := ioutil.ReadAll(r.HTTPResponse.Body)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
} else {
str := string(b)
payload.Set(reflect.ValueOf(&str))
}
default:
switch payload.Type().String() {
case "io.ReadSeeker":
payload.Set(reflect.ValueOf(aws.ReadSeekCloser(r.HTTPResponse.Body)))
case "aws.ReadSeekCloser", "io.ReadCloser":
payload.Set(reflect.ValueOf(r.HTTPResponse.Body))
default:
r.Error = awserr.New("SerializationError",
"failed to decode REST response",
fmt.Errorf("unknown payload type %s", payload.Type()))
}
}
}
}
}
}
}
// requestCred requests the credentials for a specific credentials from the EC2 service.
//
// If the credentials cannot be found, or there is an error reading the response
// and error will be returned.
func requestCred(client *ec2metadata.Client, credsName string) (ec2RoleCredRespBody, error) {
resp, err := client.GetMetadata(path.Join(iamSecurityCredsPath, credsName))
if err != nil {
return ec2RoleCredRespBody{},
awserr.New("EC2RoleRequestError",
fmt.Sprintf("failed to get %s EC2 Role credentials", credsName),
err)
}
respCreds := ec2RoleCredRespBody{}
if err := json.NewDecoder(strings.NewReader(resp)).Decode(&respCreds); err != nil {
return ec2RoleCredRespBody{},
awserr.New("SerializationError",
fmt.Sprintf("failed to decode %s EC2 Role credentials", credsName),
err)
}
if respCreds.Code != "Success" {
// If an error code was returned something failed requesting the role.
return ec2RoleCredRespBody{}, awserr.New(respCreds.Code, respCreds.Message, nil)
}
return respCreds, nil
}
func unmarshalLocationElements(r *service.Request, v reflect.Value) {
for i := 0; i < v.NumField(); i++ {
m, field := v.Field(i), v.Type().Field(i)
if n := field.Name; n[0:1] == strings.ToLower(n[0:1]) {
continue
}
if m.IsValid() {
name := field.Tag.Get("locationName")
if name == "" {
name = field.Name
}
switch field.Tag.Get("location") {
case "statusCode":
unmarshalStatusCode(m, r.HTTPResponse.StatusCode)
case "header":
err := unmarshalHeader(m, r.HTTPResponse.Header.Get(name))
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
break
}
case "headers":
prefix := field.Tag.Get("locationName")
err := unmarshalHeaderMap(m, r.HTTPResponse.Header, prefix)
if err != nil {
r.Error = awserr.New("SerializationError", "failed to decode REST response", err)
break
}
}
}
if r.Error != nil {
return
}
}
}
func TestMetadataNotAvailable(t *testing.T) {
c := ec2metadata.New(nil)
c.Handlers.Send.Clear()
c.Handlers.Send.PushBack(func(r *service.Request) {
r.HTTPResponse = &http.Response{
StatusCode: int(0),
Status: http.StatusText(int(0)),
Body: ioutil.NopCloser(bytes.NewReader([]byte{})),
}
r.Error = awserr.New("RequestError", "send request failed", nil)
r.Retryable = aws.Bool(true) // network errors are retryable
})
available := c.Available()
assert.False(t, available)
}
func buildBody(r *service.Request, v reflect.Value) {
if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
if payloadName := field.Tag.Get("payload"); payloadName != "" {
pfield, _ := v.Type().FieldByName(payloadName)
if ptag := pfield.Tag.Get("type"); ptag != "" && ptag != "structure" {
payload := reflect.Indirect(v.FieldByName(payloadName))
if payload.IsValid() && payload.Interface() != nil {
switch reader := payload.Interface().(type) {
case io.ReadSeeker:
r.SetReaderBody(reader)
case []byte:
r.SetBufferBody(reader)
case string:
r.SetStringBody(reader)
default:
r.Error = awserr.New("SerializationError",
"failed to encode REST request",
fmt.Errorf("unknown payload type %s", payload.Type()))
}
}
}
}
}
}
package credentials
import (
"fmt"
"os"
"path/filepath"
"github.com/convox/env/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws/awserr"
"github.com/convox/env/Godeps/_workspace/src/github.com/vaughan0/go-ini"
)
var (
// ErrSharedCredentialsHomeNotFound is emitted when the user directory cannot be found.
//
// @readonly
ErrSharedCredentialsHomeNotFound = awserr.New("UserHomeNotFound", "user home directory not found.", nil)
)
// A SharedCredentialsProvider retrieves credentials from the current user's home
// directory, and keeps track if those credentials are expired.
//
// Profile ini file example: $HOME/.aws/credentials
type SharedCredentialsProvider struct {
// Path to the shared credentials file.
//
// If empty will look for "AWS_SHARED_CREDENTIALS_FILE" env variable. If the
// env value is empty will default to current user's home directory.
// Linux/OSX: "$HOME/.aws/credentials"
// Windows: "%USERPROFILE%\.aws\credentials"
Filename string
package credentials
import (
"github.com/convox/env/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws/awserr"
)
var (
// ErrNoValidProvidersFoundInChain Is returned when there are no valid
// providers in the ChainProvider.
//
// @readonly
ErrNoValidProvidersFoundInChain = awserr.New("NoCredentialProviders", "no valid providers in chain", nil)
)
// A ChainProvider will search for a provider which returns credentials
// and cache that provider until Retrieve is called again.
//
// The ChainProvider provides a way of chaining multiple providers together
// which will pick the first available using priority order of the Providers
// in the list.
//
// If none of the Providers retrieve valid credentials Value, ChainProvider's
// Retrieve() will return the error ErrNoValidProvidersFoundInChain.
//
// If a Provider is found which returns valid credentials Value ChainProvider
// will cache that Provider for all calls to IsExpired(), until Retrieve is
// called again.
//
// Example of ChainProvider to be used with an EnvProvider and EC2RoleProvider.
// In this example EnvProvider will first check if any credentials are available
// vai the environment variables. If there are none ChainProvider will check
package credentials
import (
"os"
"github.com/convox/env/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws/awserr"
)
var (
// ErrAccessKeyIDNotFound is returned when the AWS Access Key ID can't be
// found in the process's environment.
//
// @readonly
ErrAccessKeyIDNotFound = awserr.New("EnvAccessKeyNotFound", "AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY not found in environment", nil)
// ErrSecretAccessKeyNotFound is returned when the AWS Secret Access Key
// can't be found in the process's environment.
//
// @readonly
ErrSecretAccessKeyNotFound = awserr.New("EnvSecretNotFound", "AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY not found in environment", nil)
)
// A EnvProvider retrieves credentials from the environment variables of the
// running process. Environment credentials never expire.
//
// Environment variables used:
//
// * Access Key ID: AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY
// * Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY
type EnvProvider struct {
retrieved bool
package credentials
import (
"github.com/convox/env/Godeps/_workspace/src/github.com/aws/aws-sdk-go/aws/awserr"
)
var (
// ErrStaticCredentialsEmpty is emitted when static credentials are empty.
//
// @readonly
ErrStaticCredentialsEmpty = awserr.New("EmptyStaticCreds", "static credentials are empty", nil)
)
// A StaticProvider is a set of credentials which are set pragmatically,
// and will never expire.
type StaticProvider struct {
Value
}
// NewStaticCredentials returns a pointer to a new Credentials object
// wrapping a static credentials value provider.
func NewStaticCredentials(id, secret, token string) *Credentials {
return NewCredentials(&StaticProvider{Value: Value{
AccessKeyID: id,
SecretAccessKey: secret,
SessionToken: token,
}})
}
// Retrieve returns the credentials or error if the credentials are invalid.
func (s *StaticProvider) Retrieve() (Value, error) {
r.Config.Credentials.Expire()
}
}
}
r.RetryCount++
r.Error = nil
}
}
var (
// ErrMissingRegion is an error that is returned if region configuration is
// not found.
//
// @readonly
ErrMissingRegion error = awserr.New("MissingRegion", "could not find region configuration", nil)
// ErrMissingEndpoint is an error that is returned if an endpoint cannot be
// resolved for a service.
//
// @readonly
ErrMissingEndpoint error = awserr.New("MissingEndpoint", "'Endpoint' configuration is required for this service", nil)
)
// ValidateEndpointHandler is a request handler to validate a request had the
// appropriate Region and Endpoint set. Will set r.Error if the endpoint or
// region is not valid.
func ValidateEndpointHandler(r *Request) {
if r.Service.SigningRegion == "" && aws.StringValue(r.Service.Config.Region) == "" {
r.Error = ErrMissingRegion
} else if r.Service.Endpoint == "" {
// ValidateResponseHandler is a request handler to validate service response.
func ValidateResponseHandler(r *Request) {
if r.HTTPResponse.StatusCode == 0 || r.HTTPResponse.StatusCode >= 300 {
// this may be replaced by an UnmarshalError handler
r.Error = awserr.New("UnknownError", "unknown error", nil)
}
}
func TestCredentialsGetWithError(t *testing.T) {
c := NewCredentials(&stubProvider{err: awserr.New("provider error", "", nil), expired: true})
_, err := c.Get()
assert.Equal(t, "provider error", err.(awserr.Error).Code(), "Expected provider error")
}