aliyun / credentials-go

import (

	"bufio"

	"errors"

	"fmt"

	"net/http"

	"net/url"

	"os"

	"strings"

	"time"

	"github.com/alibabacloud-go/debug/debug"

	"github.com/alibabacloud-go/tea/tea"

	"github.com/aliyun/credentials-go/credentials/request"

	"github.com/aliyun/credentials-go/credentials/response"

	"github.com/aliyun/credentials-go/credentials/utils"

)

var debuglog = debug.Init("credential")

var hookParse = func(err error) error {

	return err

}

// Credential is an interface for getting actual credential

type Credential interface {

	GetAccessKeyId() (*string, error)

	GetAccessKeySecret() (*string, error)

	GetSecurityToken() (*string, error)

	GetBearerToken() *string

	GetType() *string

}

// Config is important when call NewCredential

type Config struct {

	Type                  *string  `json:"type"`

	AccessKeyId           *string  `json:"access_key_id"`

	AccessKeySecret       *string  `json:"access_key_secret"`

	OIDCProviderArn       *string  `json:"oidc_provider_arn"`

	OIDCTokenFilePath     *string  `json:"oidc_token"`

	RoleArn               *string  `json:"role_arn"`

	RoleSessionName       *string  `json:"role_session_name"`

	PublicKeyId           *string  `json:"public_key_id"`

	RoleName              *string  `json:"role_name"`

	SessionExpiration     *int     `json:"session_expiration"`

	PrivateKeyFile        *string  `json:"private_key_file"`

	BearerToken           *string  `json:"bearer_token"`

	SecurityToken         *string  `json:"security_token"`

	RoleSessionExpiration *int     `json:"role_session_expiratioon"`

	Policy                *string  `json:"policy"`

	Host                  *string  `json:"host"`

	Timeout               *int     `json:"timeout"`

	ConnectTimeout        *int     `json:"connect_timeout"`

	Proxy                 *string  `json:"proxy"`

	InAdvanceScale        *float64 `json:"inAdvanceScale"`

	Url                   *string  `json:"url"`

}

func (s Config) String() string {

	return tea.Prettify(s)

}

func (s Config) GoString() string {

	return s.String()

}

func (s *Config) SetAccessKeyId(v string) *Config {

	s.AccessKeyId = &v

	return s

}

func (s *Config) SetAccessKeySecret(v string) *Config {

	s.AccessKeySecret = &v

	return s

}

func (s *Config) SetSecurityToken(v string) *Config {

	s.SecurityToken = &v

	return s

}

func (s *Config) SetRoleArn(v string) *Config {

	s.RoleArn = &v

	return s

}

func (s *Config) SetRoleSessionName(v string) *Config {

	s.RoleSessionName = &v

	return s

}

func (s *Config) SetPublicKeyId(v string) *Config {

	s.PublicKeyId = &v

	return s

}

func (s *Config) SetRoleName(v string) *Config {

	s.RoleName = &v

	return s

}

func (s *Config) SetSessionExpiration(v int) *Config {

	s.SessionExpiration = &v

	return s

}

func (s *Config) SetPrivateKeyFile(v string) *Config {

	s.PrivateKeyFile = &v

	return s

}

func (s *Config) SetBearerToken(v string) *Config {

	s.BearerToken = &v

	return s

}

func (s *Config) SetRoleSessionExpiration(v int) *Config {

	s.RoleSessionExpiration = &v

	return s

}

func (s *Config) SetPolicy(v string) *Config {

	s.Policy = &v

	return s

}

func (s *Config) SetHost(v string) *Config {

	s.Host = &v

	return s

}

func (s *Config) SetTimeout(v int) *Config {

	s.Timeout = &v

	return s

}

func (s *Config) SetConnectTimeout(v int) *Config {

	s.ConnectTimeout = &v

	return s

}

func (s *Config) SetProxy(v string) *Config {

	s.Proxy = &v

	return s

}

func (s *Config) SetType(v string) *Config {

	s.Type = &v

	return s

}

func (s *Config) SetOIDCTokenFilePath(v string) *Config {

	s.OIDCTokenFilePath = &v

	return s

}

func (s *Config) SetOIDCProviderArn(v string) *Config {

	s.OIDCProviderArn = &v

	return s

}

func (s *Config) SetURLCredential(v string) *Config {

	if v == "" {

		v = os.Getenv("ALIBABA_CLOUD_CREDENTIALS_URI")

	}

	s.Url = &v

	return s

}

// NewCredential return a credential according to the type in config.

// if config is nil, the function will use default provider chain to get credential.

// please see README.md for detail.

func NewCredential(config *Config) (credential Credential, err error) {

	if config == nil {

		config, err = defaultChain.resolve()

		if err != nil {

			return

		}

		return NewCredential(config)

	}

	switch tea.StringValue(config.Type) {

	case "credentials_uri":

		credential = newURLCredential(tea.StringValue(config.Url))

	case "oidc_role_arn":

		err = checkoutAssumeRamoidc(config)

		if err != nil {

			return

		}

		runtime := &utils.Runtime{

			Host:           tea.StringValue(config.Host),

			Proxy:          tea.StringValue(config.Proxy),

			ReadTimeout:    tea.IntValue(config.Timeout),

			ConnectTimeout: tea.IntValue(config.ConnectTimeout),

		}

		credential = newOIDCRoleArnCredential(tea.StringValue(config.AccessKeyId), tea.StringValue(config.AccessKeySecret), tea.StringValue(config.RoleArn), tea.StringValue(config.OIDCProviderArn), tea.StringValue(config.OIDCTokenFilePath), tea.StringValue(config.RoleSessionName), tea.StringValue(config.Policy), tea.IntValue(config.RoleSessionExpiration), runtime)

	case "access_key":

		err = checkAccessKey(config)

		if err != nil {

			return

		}

		credential = newAccessKeyCredential(tea.StringValue(config.AccessKeyId), tea.StringValue(config.AccessKeySecret))

	case "sts":

		err = checkSTS(config)

		if err != nil {

			return

		}

		credential = newStsTokenCredential(tea.StringValue(config.AccessKeyId), tea.StringValue(config.AccessKeySecret), tea.StringValue(config.SecurityToken))

	case "ecs_ram_role":

		checkEcsRAMRole(config)

		runtime := &utils.Runtime{

			Host:           tea.StringValue(config.Host),

			Proxy:          tea.StringValue(config.Proxy),

			ReadTimeout:    tea.IntValue(config.Timeout),

			ConnectTimeout: tea.IntValue(config.ConnectTimeout),

		}

		credential = newEcsRAMRoleCredential(tea.StringValue(config.RoleName), tea.Float64Value(config.InAdvanceScale), runtime)

	case "ram_role_arn":

		err = checkRAMRoleArn(config)

		if err != nil {

			return

		}

		runtime := &utils.Runtime{

			Host:           tea.StringValue(config.Host),

			Proxy:          tea.StringValue(config.Proxy),

			ReadTimeout:    tea.IntValue(config.Timeout),

			ConnectTimeout: tea.IntValue(config.ConnectTimeout),

		}

		credential = newRAMRoleArnCredential(tea.StringValue(config.AccessKeyId), tea.StringValue(config.AccessKeySecret), tea.StringValue(config.RoleArn), tea.StringValue(config.RoleSessionName), tea.StringValue(config.Policy), tea.IntValue(config.RoleSessionExpiration), runtime)

	case "rsa_key_pair":

		err = checkRSAKeyPair(config)

		if err != nil {

			return

		}

		file, err1 := os.Open(tea.StringValue(config.PrivateKeyFile))

		if err1 != nil {

			err = fmt.Errorf("InvalidPath: Can not open PrivateKeyFile, err is %s", err1.Error())

			return

		}

		defer file.Close()

		var privateKey string

		scan := bufio.NewScanner(file)

		for scan.Scan() {

			if strings.HasPrefix(scan.Text(), "----") {

				continue

			}

			privateKey += scan.Text() + "\n"

		}

		runtime := &utils.Runtime{

			Host:           tea.StringValue(config.Host),

			Proxy:          tea.StringValue(config.Proxy),

			ReadTimeout:    tea.IntValue(config.Timeout),

			ConnectTimeout: tea.IntValue(config.ConnectTimeout),

		}

		credential = newRsaKeyPairCredential(privateKey, tea.StringValue(config.PublicKeyId), tea.IntValue(config.SessionExpiration), runtime)

	case "bearer":

		if tea.StringValue(config.BearerToken) == "" {

			err = errors.New("BearerToken cannot be empty")

			return

		}

		credential = newBearerTokenCredential(tea.StringValue(config.BearerToken))

	default:

		err = errors.New("Invalid type option, support: access_key, sts, ecs_ram_role, ram_role_arn, rsa_key_pair")

		return

	}

	return credential, nil

}

func checkRSAKeyPair(config *Config) (err error) {

	if tea.StringValue(config.PrivateKeyFile) == "" {

		err = errors.New("PrivateKeyFile cannot be empty")

		return

	}

	if tea.StringValue(config.PublicKeyId) == "" {

		err = errors.New("PublicKeyId cannot be empty")

		return

	}

	return

}

func checkRAMRoleArn(config *Config) (err error) {

	if tea.StringValue(config.AccessKeySecret) == "" {

		err = errors.New("AccessKeySecret cannot be empty")

		return

	}

	if tea.StringValue(config.RoleArn) == "" {

		err = errors.New("RoleArn cannot be empty")

		return

	}

	if tea.StringValue(config.RoleSessionName) == "" {

		err = errors.New("RoleSessionName cannot be empty")

		return

	}

	if tea.StringValue(config.AccessKeyId) == "" {

		err = errors.New("AccessKeyId cannot be empty")

		return

	}

	return

}

func checkEcsRAMRole(config *Config) (err error) {

	return

}

func checkSTS(config *Config) (err error) {

	if tea.StringValue(config.AccessKeyId) == "" {

		err = errors.New("AccessKeyId cannot be empty")

		return

	}

	if tea.StringValue(config.AccessKeySecret) == "" {

		err = errors.New("AccessKeySecret cannot be empty")

		return

	}

	if tea.StringValue(config.SecurityToken) == "" {

		err = errors.New("SecurityToken cannot be empty")

		return

	}

	return

}

func checkAccessKey(config *Config) (err error) {

	if tea.StringValue(config.AccessKeyId) == "" {

		err = errors.New("AccessKeyId cannot be empty")

		return

	}

	if tea.StringValue(config.AccessKeySecret) == "" {

		err = errors.New("AccessKeySecret cannot be empty")

		return

	}

	return

}

func doAction(request *request.CommonRequest, runtime *utils.Runtime) (content []byte, err error) {

	var urlEncoded string

	if request.BodyParams != nil {

		urlEncoded = utils.GetURLFormedMap(request.BodyParams)

	}

	httpRequest, err := http.NewRequest(request.Method, request.URL, strings.NewReader(urlEncoded))

	if err != nil {

		return

	}

	httpRequest.Proto = "HTTP/1.1"

	httpRequest.Host = request.Domain

	debuglog("> %s %s %s", httpRequest.Method, httpRequest.URL.RequestURI(), httpRequest.Proto)

	debuglog("> Host: %s", httpRequest.Host)

	for key, value := range request.Headers {

		if value != "" {

			debuglog("> %s: %s", key, value)

			httpRequest.Header[key] = []string{value}

		}

	}

	debuglog(">")

	httpClient := &http.Client{}

	httpClient.Timeout = time.Duration(runtime.ReadTimeout) * time.Second

	proxy := &url.URL{}

	if runtime.Proxy != "" {

		proxy, err = url.Parse(runtime.Proxy)

		if err != nil {

			return

		}

	}

	trans := &http.Transport{}

	if proxy != nil && runtime.Proxy != "" {

		trans.Proxy = http.ProxyURL(proxy)

	}

	trans.DialContext = utils.Timeout(time.Duration(runtime.ConnectTimeout) * time.Second)

	httpClient.Transport = trans

	httpResponse, err := hookDo(httpClient.Do)(httpRequest)

	if err != nil {

		return

	}

	debuglog("< %s %s", httpResponse.Proto, httpResponse.Status)

	for key, value := range httpResponse.Header {

		debuglog("< %s: %v", key, strings.Join(value, ""))

	}

	debuglog("<")

	resp := &response.CommonResponse{}

	err = hookParse(resp.ParseFromHTTPResponse(httpResponse))

	if err != nil {

		return

	}

	debuglog("%s", resp.GetHTTPContentString())

	if resp.GetHTTPStatus() != http.StatusOK {

		err = fmt.Errorf("httpStatus: %d, message = %s", resp.GetHTTPStatus(), resp.GetHTTPContentString())

		return

	}

	return resp.GetHTTPContentBytes(), nil

}