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package credentials |
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import ( |
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"encoding/json" |
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"fmt" |
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"strconv" |
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"time" |
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"github.com/alibabacloud-go/tea/tea" |
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"github.com/aliyun/credentials-go/credentials/internal/utils" |
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"github.com/aliyun/credentials-go/credentials/request" |
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) |
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var securityCredURL = "http://100.100.100.200/latest/meta-data/ram/security-credentials/" |
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var securityCredTokenURL = "http://100.100.100.200/latest/api/token" |
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const defaultMetadataTokenDuration = int(21600) |
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// ECSRAMRoleCredentialsProvider is a kind of credentials provider |
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type ECSRAMRoleCredentialsProvider struct { |
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*credentialUpdater |
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RoleName string |
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EnableIMDSv2 bool |
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MetadataTokenDuration int |
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sessionCredential *sessionCredential |
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runtime *utils.Runtime |
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metadataToken string |
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staleTime int64 |
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} |
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type ecsRAMRoleResponse struct { |
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Code string `json:"Code" xml:"Code"` |
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AccessKeyId string `json:"AccessKeyId" xml:"AccessKeyId"` |
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AccessKeySecret string `json:"AccessKeySecret" xml:"AccessKeySecret"` |
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SecurityToken string `json:"SecurityToken" xml:"SecurityToken"` |
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Expiration string `json:"Expiration" xml:"Expiration"` |
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} |
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func newEcsRAMRoleCredentialWithEnableIMDSv2(roleName string, enableIMDSv2 bool, metadataTokenDuration int, inAdvanceScale float64, runtime *utils.Runtime) *ECSRAMRoleCredentialsProvider { |
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credentialUpdater := new(credentialUpdater) |
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if inAdvanceScale < 1 && inAdvanceScale > 0 { |
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credentialUpdater.inAdvanceScale = inAdvanceScale |
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} |
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return &ECSRAMRoleCredentialsProvider{ |
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RoleName: roleName, |
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EnableIMDSv2: enableIMDSv2, |
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MetadataTokenDuration: metadataTokenDuration, |
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credentialUpdater: credentialUpdater, |
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runtime: runtime, |
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} |
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} |
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func (e *ECSRAMRoleCredentialsProvider) GetCredential() (credentials *CredentialModel, err error) { |
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if e.sessionCredential == nil || e.needUpdateCredential() { |
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err = e.updateCredential() |
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if err != nil { |
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if e.credentialExpiration > (int(time.Now().Unix()) - int(e.lastUpdateTimestamp)) { |
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// 虽然有错误，但是已有的 credentials 还有效 |
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} else { |
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return |
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} |
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} |
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} |
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credentials = &CredentialModel{ |
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AccessKeyId: tea.String(e.sessionCredential.AccessKeyId), |
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AccessKeySecret: tea.String(e.sessionCredential.AccessKeySecret), |
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SecurityToken: tea.String(e.sessionCredential.SecurityToken), |
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Type: tea.String("ecs_ram_role"), |
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} |
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return |
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} |
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// GetAccessKeyId reutrns EcsRAMRoleCredential's AccessKeyId |
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// if AccessKeyId is not exist or out of date, the function will update it. |
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func (e *ECSRAMRoleCredentialsProvider) GetAccessKeyId() (accessKeyId *string, err error) { |
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c, err := e.GetCredential() |
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if err != nil { |
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return |
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} |
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accessKeyId = c.AccessKeyId |
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return |
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} |
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// GetAccessSecret reutrns EcsRAMRoleCredential's AccessKeySecret |
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// if AccessKeySecret is not exist or out of date, the function will update it. |
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func (e *ECSRAMRoleCredentialsProvider) GetAccessKeySecret() (accessKeySecret *string, err error) { |
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c, err := e.GetCredential() |
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if err != nil { |
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return |
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} |
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accessKeySecret = c.AccessKeySecret |
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return |
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} |
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// GetSecurityToken reutrns EcsRAMRoleCredential's SecurityToken |
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// if SecurityToken is not exist or out of date, the function will update it. |
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func (e *ECSRAMRoleCredentialsProvider) GetSecurityToken() (securityToken *string, err error) { |
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c, err := e.GetCredential() |
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if err != nil { |
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return |
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} |
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securityToken = c.SecurityToken |
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return |
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} |
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// GetBearerToken is useless for EcsRAMRoleCredential |
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func (e *ECSRAMRoleCredentialsProvider) GetBearerToken() *string { |
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return tea.String("") |
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} |
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// GetType reutrns EcsRAMRoleCredential's type |
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func (e *ECSRAMRoleCredentialsProvider) GetType() *string { |
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return tea.String("ecs_ram_role") |
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} |
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func getRoleName() (string, error) { |
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runtime := utils.NewRuntime(1, 1, "", "") |
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request := request.NewCommonRequest() |
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request.URL = securityCredURL |
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request.Method = "GET" |
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content, err := doAction(request, runtime) |
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if err != nil { |
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return "", err |
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} |
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return string(content), nil |
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} |
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func (e *ECSRAMRoleCredentialsProvider) getMetadataToken() (err error) { |
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if e.needToRefresh() { |
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if e.MetadataTokenDuration <= 0 { |
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e.MetadataTokenDuration = defaultMetadataTokenDuration |
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} |
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tmpTime := time.Now().Unix() + int64(e.MetadataTokenDuration*1000) |
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request := request.NewCommonRequest() |
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request.URL = securityCredTokenURL |
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request.Method = "PUT" |
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request.Headers["X-aliyun-ecs-metadata-token-ttl-seconds"] = strconv.Itoa(e.MetadataTokenDuration) |
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content, err := doAction(request, e.runtime) |
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if err != nil { |
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return err |
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} |
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e.staleTime = tmpTime |
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e.metadataToken = string(content) |
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} |
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return |
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} |
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func (e *ECSRAMRoleCredentialsProvider) updateCredential() (err error) { |
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if e.runtime == nil { |
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e.runtime = new(utils.Runtime) |
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} |
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request := request.NewCommonRequest() |
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if e.RoleName == "" { |
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e.RoleName, err = getRoleName() |
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if err != nil { |
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return fmt.Errorf("refresh Ecs sts token err: %s", err.Error()) |
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} |
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} |
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if e.EnableIMDSv2 { |
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err = e.getMetadataToken() |
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if err != nil { |
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return fmt.Errorf("failed to get token from ECS Metadata Service: %s", err.Error()) |
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} |
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request.Headers["X-aliyun-ecs-metadata-token"] = e.metadataToken |
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} |
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request.URL = securityCredURL + e.RoleName |
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request.Method = "GET" |
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content, err := doAction(request, e.runtime) |
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if err != nil { |
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return fmt.Errorf("refresh Ecs sts token err: %s", err.Error()) |
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} |
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var resp *ecsRAMRoleResponse |
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err = json.Unmarshal(content, &resp) |
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if err != nil { |
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return fmt.Errorf("refresh Ecs sts token err: Json Unmarshal fail: %s", err.Error()) |
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} |
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if resp.Code != "Success" { |
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return fmt.Errorf("refresh Ecs sts token err: Code is not Success") |
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} |
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if resp.AccessKeyId == "" || resp.AccessKeySecret == "" || resp.SecurityToken == "" || resp.Expiration == "" { |
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return fmt.Errorf("refresh Ecs sts token err: AccessKeyId: %s, AccessKeySecret: %s, SecurityToken: %s, Expiration: %s", resp.AccessKeyId, resp.AccessKeySecret, resp.SecurityToken, resp.Expiration) |
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} |
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expirationTime, err := time.Parse("2006-01-02T15:04:05Z", resp.Expiration) |
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e.lastUpdateTimestamp = time.Now().Unix() |
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e.credentialExpiration = int(expirationTime.Unix() - time.Now().Unix()) |
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e.sessionCredential = &sessionCredential{ |
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AccessKeyId: resp.AccessKeyId, |
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AccessKeySecret: resp.AccessKeySecret, |
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SecurityToken: resp.SecurityToken, |
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} |
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return |
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} |
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func (e *ECSRAMRoleCredentialsProvider) needToRefresh() (needToRefresh bool) { |
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needToRefresh = time.Now().Unix() >= e.staleTime |
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return |
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} |
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aliyun /
credentials-go
