private StringContent GetAccessTokenRequestBody(TargetUri targetUri, TokenScope tokenScope, TimeSpan?duration = null)
{
const string ContentBasicJsonFormat = "{{ \"scope\" : \"{0}\", \"displayName\" : \"Git: {1} on {2}\" }}";
const string ContentTimedJsonFormat = "{{ \"scope\" : \"{0}\", \"displayName\" : \"Git: {1} on {2}\", \"validTo\": \"{3:u}\" }}";
const string HttpJsonContentType = "application/json";
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (tokenScope is null)
{
throw new ArgumentNullException(nameof(tokenScope));
}
string tokenUrl = GetTargetUrl(targetUri, false);
Trace.WriteLine($"creating access token scoped to '{tokenScope}' for '{tokenUrl}'");
string jsonContent = (duration.HasValue && duration.Value > TimeSpan.FromHours(1))
? string.Format(Culture.InvariantCulture, ContentTimedJsonFormat, tokenScope, tokenUrl, Settings.MachineName, DateTime.UtcNow + duration.Value)
: string.Format(Culture.InvariantCulture, ContentBasicJsonFormat, tokenScope, tokenUrl, Settings.MachineName);
var content = new StringContent(jsonContent, Encoding.UTF8, HttpJsonContentType);
return(content);
}
public MsaAuthentication(
RuntimeContext context,
TokenScope tokenScope,
ICredentialStore personalAccessTokenStore)
: base(context, tokenScope, personalAccessTokenStore)
{
Authority = new Authority(context, AzureDevOps.Authentication.Authority.DefaultAuthorityHostUrl);
}
/// <summary>
/// Generates a "personal access token" or service specific, usage restricted access token.
/// <para/>
/// Returns a "personal access token" for the user if successful; otherwise `<see langword="null"/>`.
/// </summary>
/// <param name="targetUri">The target resource for which to acquire the personal access token for.</param>
/// <param name="accessToken">Azure Directory access token with privileges to grant access to the target resource.</param>
/// <param name="options">Set of options related to generation of personal access tokens.</param>
protected async Task <Credential> GeneratePersonalAccessToken(
TargetUri targetUri,
Token accessToken,
PersonalAccessTokenOptions options)
{
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (accessToken is null)
{
throw new ArgumentNullException(nameof(accessToken));
}
TokenScope requestedScope = TokenScope;
if (options.TokenScope != null)
{
// Take the intersection of the authority scope and the requested scope
requestedScope &= options.TokenScope;
// If the result of the intersection is none, then fail
if (string.IsNullOrWhiteSpace(requestedScope.Value))
{
throw new InvalidOperationException("Invalid scope requested. Requested scope would result in no access privileges.");
}
}
Credential credential = null;
Token personalAccessToken;
if ((personalAccessToken = await Authority.GeneratePersonalAccessToken(targetUri, accessToken, requestedScope, options.RequireCompactToken, options.TokenDuration)) != null)
{
credential = (Credential)personalAccessToken;
Trace.WriteLine($"personal access token created for '{targetUri}'.");
try
{
await PersonalAccessTokenStore.WriteCredentials(targetUri, credential);
}
catch (Exception exception)
{
System.Diagnostics.Debug.WriteLine(exception);
Trace.WriteLine($"failed to write credentials to the secure store: {exception.GetType().Name}.");
}
}
return(credential);
}
/// <summary>
/// Creates a new authentication broker based for the specified resource.
/// <para/>
/// Returns `<see langword="true"/>` if an authority could be determined; otherwise `<see langword="false"/>`.
/// </summary>
/// <param name="targetUri">The resource for which authentication is being requested.</param>
/// <param name="scope">The scope of the access being requested.</param>
/// <param name="personalAccessTokenStore">Storage container for personal access token secrets.</param>
public static async Task <BaseAuthentication> GetAuthentication(
RuntimeContext context,
TargetUri targetUri,
TokenScope scope,
ICredentialStore personalAccessTokenStore)
{
if (context is null)
{
throw new ArgumentNullException(nameof(context));
}
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (scope is null)
{
throw new ArgumentNullException(nameof(scope));
}
if (personalAccessTokenStore is null)
{
throw new ArgumentNullException(nameof(personalAccessTokenStore));
}
Guid?result = await DetectAuthority(context, targetUri);
if (!result.HasValue)
{
return(null);
}
// Query for the tenant's identity
Guid tenantId = result.Value;
BaseAuthentication authentication = null;
// empty identity is MSA, anything else is AAD
if (tenantId == Guid.Empty)
{
context.Trace.WriteLine("MSA authority detected.");
authentication = new MsaAuthentication(context, scope, personalAccessTokenStore);
}
else
{
context.Trace.WriteLine($"AAD authority for tenant '{tenantId.ToString("N")}' detected.");
authentication = new AadAuthentication(context, tenantId, scope, personalAccessTokenStore);
(authentication as AadAuthentication).TenantId = tenantId;
}
return(authentication);
}
/// <summary>
/// Creates a new instance of `<see cref="AadAuthentication"/>`.
/// </summary>
/// <param name="tenantId">
/// URI of the responsible Azure tenant.
/// <para/>
/// Use `<see cref="Authentication.GetAuthentication"/>` to detect the tenant identity and create the authentication object.
/// </param>
/// <param name="tokenScope">The scope of all access tokens acquired by the authority.</param>
/// <param name="personalAccessTokenStore">The secure secret store for storing any personal access tokens acquired.</param>
/// <param name="adaRefreshTokenStore">The secure secret store for storing any Azure tokens acquired.</param>
public AadAuthentication(
RuntimeContext context,
Guid tenantId,
TokenScope tokenScope,
ICredentialStore personalAccessTokenStore)
: base(context, tokenScope, personalAccessTokenStore)
{
if (tenantId == Guid.Empty)
{
Authority = new Authority(context, AzureDevOps.Authentication.Authority.DefaultAuthorityHostUrl);
}
else
{
// Create an authority host URL in the format of https://login.microsoft.com/12345678-9ABC-DEF0-1234-56789ABCDEF0.
string authorityHost = AzureDevOps.Authentication.Authority.GetAuthorityUrl(tenantId);
Authority = new Authority(context, authorityHost);
}
}
protected Authentication(
RuntimeContext context,
TokenScope tokenScope,
ICredentialStore personalAccessTokenStore)
: base(context)
{
if (tokenScope is null)
{
throw new ArgumentNullException(nameof(tokenScope));
}
if (personalAccessTokenStore is null)
{
throw new ArgumentNullException(nameof(personalAccessTokenStore));
}
ClientId = DefaultClientId;
Resource = DefaultResource;
TokenScope = tokenScope;
PersonalAccessTokenStore = personalAccessTokenStore;
Authority = new Authority(context);
}
public static bool Find(string value, out TokenScope devopsScope)
{
devopsScope = EnumerateValues().FirstOrDefault(v => StringComparer.OrdinalIgnoreCase.Equals(v.Value, value));
return(devopsScope != null);
}
public bool Equals(TokenScope other) => Microsoft.Alm.Authentication.TokenScope.Equals(this as Microsoft.Alm.Authentication.TokenScope, other as Microsoft.Alm.Authentication.TokenScope);
public async Task <Token> GeneratePersonalAccessToken(TargetUri targetUri, Token authorization, TokenScope tokenScope, bool requireCompactToken, TimeSpan?tokenDuration)
{
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (authorization is null)
{
throw new ArgumentNullException(nameof(authorization));
}
if (tokenScope is null)
{
throw new ArgumentNullException(nameof(tokenScope));
}
try
{
var requestUri = await CreatePersonalAccessTokenRequestUri(targetUri, authorization, requireCompactToken);
var options = new NetworkRequestOptions(true)
{
Authorization = authorization,
};
using (StringContent content = GetAccessTokenRequestBody(targetUri, tokenScope, tokenDuration))
using (var response = await Network.HttpPostAsync(requestUri, content, options))
{
if (response.IsSuccessStatusCode)
{
string responseText = response.Content.AsString;
if (!string.IsNullOrWhiteSpace(responseText))
{
// Find the 'token : <value>' portion of the result content, if any.
Match tokenMatch = null;
if ((tokenMatch = Regex.Match(responseText, @"\s*""token""\s*:\s*""([^\""]+)""\s*", RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase)).Success)
{
string tokenValue = tokenMatch.Groups[1].Value;
Token token = new Token(tokenValue, TokenType.Personal);
Trace.WriteLine($"personal access token acquisition for '{targetUri}' succeeded.");
return(token);
}
}
}
Trace.WriteLine($"failed to acquire personal access token for '{targetUri}' [{(int)response.StatusCode}].");
}
}
catch (Exception exception)
{
Trace.WriteException(exception);
}
Trace.WriteLine($"personal access token acquisition for '{targetUri}' failed.");
return(null);
}
public Task <Token> GeneratePersonalAccessToken(TargetUri targetUri, Token authorization, TokenScope tokenScope, bool requireCompactToken) => GeneratePersonalAccessToken(targetUri, authorization, tokenScope, requireCompactToken, null);
