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Copyright (c) Microsoft Corporation.\n// Licensed under the MIT License.\n\nimport type { AccessToken, GetTokenOptions, TokenCredential } from \"@azure/core-auth\";\nimport {\n checkTenantId,\n processMultiTenantRequest,\n resolveAdditionallyAllowedTenantIds,\n} from \"../util/tenantIdUtils.js\";\nimport { credentialLogger, formatError, formatSuccess } from \"../util/logging.js\";\nimport { ensureValidScopeForDevTimeCreds, getScopeResource } from \"../util/scopeUtils.js\";\n\nimport type { AzurePowerShellCredentialOptions } from \"./azurePowerShellCredentialOptions.js\";\nimport { CredentialUnavailableError } from \"../errors.js\";\nimport { processUtils } from \"../util/processUtils.js\";\nimport { tracingClient } from \"../util/tracing.js\";\n\nconst logger = credentialLogger(\"AzurePowerShellCredential\");\n\nconst isWindows = process.platform === \"win32\";\n\n/**\n * Returns a platform-appropriate command name by appending \".exe\" on Windows.\n *\n * @internal\n */\nexport function formatCommand(commandName: string): string {\n if (isWindows) {\n return `${commandName}.exe`;\n } else {\n return commandName;\n }\n}\n\n/**\n * Receives a list of commands to run, executes them, then returns the outputs.\n * If anything fails, an error is thrown.\n * @internal\n */\nasync function runCommands(commands: string[][], timeout?: number): Promise<string[]> {\n const results: string[] = [];\n\n for (const command of commands) {\n const [file, ...parameters] = command;\n const result = (await processUtils.execFile(file, parameters, {\n encoding: \"utf8\",\n timeout,\n })) as string;\n\n results.push(result);\n }\n\n return results;\n}\n\n/**\n * Known PowerShell errors\n * @internal\n */\nexport const powerShellErrors = {\n login: \"Run Connect-AzAccount to login\",\n installed:\n \"The specified module 'Az.Accounts' with version '2.2.0' was not loaded because no valid module file was found in any module directory\",\n};\n\n/**\n * Messages to use when throwing in this credential.\n * @internal\n */\nexport const powerShellPublicErrorMessages = {\n login:\n \"Please run 'Connect-AzAccount' from PowerShell to authenticate before using this credential.\",\n installed: `The 'Az.Account' module >= 2.2.0 is not installed. Install the Azure Az PowerShell module with: \"Install-Module -Name Az -Scope CurrentUser -Repository PSGallery -Force\".`,\n claim:\n \"This credential doesn't support claims challenges. To authenticate with the required claims, please run the following command:\",\n troubleshoot: `To troubleshoot, visit https://aka.ms/azsdk/js/identity/powershellcredential/troubleshoot.`,\n};\n\n// PowerShell Azure User not logged in error check.\nconst isLoginError: (err: Error) => RegExpMatchArray | null = (err: Error) =>\n err.message.match(`(.*)${powerShellErrors.login}(.*)`);\n\n// Az Module not Installed in Azure PowerShell check.\nconst isNotInstalledError: (err: Error) => RegExpMatchArray | null = (err: Error) =>\n err.message.match(powerShellErrors.installed);\n\n/**\n * The PowerShell commands to be tried, in order.\n *\n * @internal\n */\nexport const commandStack = [formatCommand(\"pwsh\")];\n\nif (isWindows) {\n commandStack.push(formatCommand(\"powershell\"));\n}\n\n/**\n * This credential will use the currently logged-in user information from the\n * Azure PowerShell module. To do so, it will read the user access token and\n * expire time with Azure PowerShell command `Get-AzAccessToken -ResourceUrl {ResourceScope}`\n */\nexport class AzurePowerShellCredential implements TokenCredential {\n private tenantId?: string;\n private additionallyAllowedTenantIds: string[];\n private timeout?: number;\n\n /**\n * Creates an instance of the {@link AzurePowerShellCredential}.\n *\n * To use this credential:\n * - Install the Azure Az PowerShell module with:\n * `Install-Module -Name Az -Scope CurrentUser -Repository PSGallery -Force`.\n * - You have already logged in to Azure PowerShell using the command\n * `Connect-AzAccount` from the command line.\n *\n * @param options - Options, to optionally allow multi-tenant requests.\n */\n constructor(options?: AzurePowerShellCredentialOptions) {\n if (options?.tenantId) {\n checkTenantId(logger, options?.tenantId);\n this.tenantId = options?.tenantId;\n }\n this.additionallyAllowedTenantIds = resolveAdditionallyAllowedTenantIds(\n options?.additionallyAllowedTenants,\n );\n this.timeout = options?.processTimeoutInMs;\n }\n\n /**\n * Gets the access token from Azure PowerShell\n * @param resource - The resource to use when getting the token\n */\n private async getAzurePowerShellAccessToken(\n resource: string,\n tenantId?: string,\n timeout?: number,\n ): Promise<{ Token: string; ExpiresOn: string }> {\n // Clone the stack to avoid mutating it while iterating\n for (const powerShellCommand of [...commandStack]) {\n try {\n await runCommands([[powerShellCommand, \"/?\"]], timeout);\n } catch (e: any) {\n // Remove this credential from the original stack so that we don't try it again.\n commandStack.shift();\n continue;\n }\n\n const results = await runCommands([\n [\n powerShellCommand,\n \"-NoProfile\",\n \"-NonInteractive\",\n \"-Command\",\n `\n $tenantId = \"${tenantId ?? \"\"}\"\n $m = Import-Module Az.Accounts -MinimumVersion 2.2.0 -PassThru\n $useSecureString = $m.Version -ge [version]'2.17.0' -and $m.Version -lt [version]'5.0.0'\n\n $params = @{\n ResourceUrl = \"${resource}\"\n }\n\n if ($tenantId.Length -gt 0) {\n $params[\"TenantId\"] = $tenantId\n }\n\n if ($useSecureString) {\n $params[\"AsSecureString\"] = $true\n }\n\n $token = Get-AzAccessToken @params\n\n $result = New-Object -TypeName PSObject\n $result | Add-Member -MemberType NoteProperty -Name ExpiresOn -Value $token.ExpiresOn\n\n if ($token.Token -is [System.Security.SecureString]) {\n if ($PSVersionTable.PSVersion.Major -lt 7) {\n $ssPtr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($token.Token)\n try {\n $result | Add-Member -MemberType NoteProperty -Name Token -Value ([System.Runtime.InteropServices.Marshal]::PtrToStringBSTR($ssPtr))\n }\n finally {\n [System.Runtime.InteropServices.Marshal]::ZeroFreeBSTR($ssPtr)\n }\n }\n else {\n $result | Add-Member -MemberType NoteProperty -Name Token -Value ($token.Token | ConvertFrom-SecureString -AsPlainText)\n }\n }\n else {\n $result | Add-Member -MemberType NoteProperty -Name Token -Value $token.Token\n }\n\n Write-Output (ConvertTo-Json $result)\n `,\n ],\n ]);\n\n const result = results[0];\n return parseJsonToken(result);\n }\n throw new Error(`Unable to execute PowerShell. Ensure that it is installed in your system`);\n }\n\n /**\n * Authenticates with Microsoft Entra ID and returns an access token if successful.\n * If the authentication cannot be performed through PowerShell, a {@link CredentialUnavailableError} will be thrown.\n *\n * @param scopes - The list of scopes for which the token will have access.\n * @param options - The options used to configure any requests this TokenCredential implementation might make.\n */\n public async getToken(\n scopes: string | string[],\n options: GetTokenOptions = {},\n ): Promise<AccessToken> {\n return tracingClient.withSpan(`${this.constructor.name}.getToken`, options, async () => {\n const scope = typeof scopes === \"string\" ? scopes : scopes[0];\n\n const claimsValue = options.claims;\n if (claimsValue && claimsValue.trim()) {\n const encodedClaims = btoa(claimsValue);\n let loginCmd = `Connect-AzAccount -ClaimsChallenge ${encodedClaims}`;\n\n const tenantIdFromOptions = options.tenantId;\n if (tenantIdFromOptions) {\n loginCmd += ` -Tenant ${tenantIdFromOptions}`;\n }\n const error = new CredentialUnavailableError(\n `${powerShellPublicErrorMessages.claim} ${loginCmd}`,\n );\n\n logger.getToken.info(formatError(scope, error));\n throw error;\n }\n\n const tenantId = processMultiTenantRequest(\n this.tenantId,\n options,\n this.additionallyAllowedTenantIds,\n );\n if (tenantId) {\n checkTenantId(logger, tenantId);\n }\n try {\n ensureValidScopeForDevTimeCreds(scope, logger);\n logger.getToken.info(`Using the scope ${scope}`);\n const resource = getScopeResource(scope);\n const response = await this.getAzurePowerShellAccessToken(resource, tenantId, this.timeout);\n logger.getToken.info(formatSuccess(scopes));\n return {\n token: response.Token,\n expiresOnTimestamp: new Date(response.ExpiresOn).getTime(),\n tokenType: \"Bearer\",\n } as AccessToken;\n } catch (err: any) {\n if (isNotInstalledError(err)) {\n const error = new CredentialUnavailableError(powerShellPublicErrorMessages.installed);\n logger.getToken.info(formatError(scope, error));\n throw error;\n } else if (isLoginError(err)) {\n const error = new CredentialUnavailableError(powerShellPublicErrorMessages.login);\n logger.getToken.info(formatError(scope, error));\n throw error;\n }\n const error = new CredentialUnavailableError(\n `${err}. ${powerShellPublicErrorMessages.troubleshoot}`,\n );\n logger.getToken.info(formatError(scope, error));\n throw error;\n }\n });\n }\n}\n\n/**\n *\n * @internal\n */\nexport async function parseJsonToken(\n result: string,\n): Promise<{ Token: string; ExpiresOn: string }> {\n const jsonRegex = /{[^{}]*}/g;\n const matches = result.match(jsonRegex);\n let resultWithoutToken = result;\n if (matches) {\n try {\n for (const item of matches) {\n try {\n const jsonContent = JSON.parse(item);\n if (jsonContent?.Token) {\n resultWithoutToken = resultWithoutToken.replace(item, \"\");\n if (resultWithoutToken) {\n logger.getToken.warning(resultWithoutToken);\n }\n return jsonContent;\n }\n } catch (e) {\n continue;\n }\n }\n } catch (e: any) {\n throw new Error(`Unable to parse the output of PowerShell. Received output: ${result}`);\n }\n }\n throw new Error(`No access token found in the output. Received output: ${result}`);\n}\n"]}
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