AzureAuth 1.2.4

AzureAuth 1.2.3

is_guid, normalize_guid and normalize_tenant now accept vector arguments. normalize_guid throws an error if any of its argument values is not a valid GUID.
get_azure_token will now display the authentication method it chooses if the auth_type argument is not explicitly specified. To avoid surprises, it’s still recommended that you specify auth_type when obtaining a token.
New load_azure_token function to retrieve a token from the cache, given its hash value.
Fixes to allow authenticating personal accounts without a tenant.

Pass the resource and scope as explicit parameters to the AAD endpoint when refreshing a token. Among other things, this allows using a refresh token from one resource to obtain an access token for another resource.
Use utils::askYesNo for prompts, eg when creating the AzureR caching directory and deleting tokens; this fixes a bug in reading the input. As a side-effect, Windows users who are using RGUI.exe will see a popup dialog box instead of a message in the terminal.

Changes to token acquisition code to better integrate with Shiny. Use the build_authorization_uri and get_device_creds functions to initiate the authorization step from within a Shiny web app. get_azure_token has new auth_code and device_creds arguments for passing in authorization details obtained separately. See the “Authenticating from Shiny” vignette for a skeleton example app.
Add use_cache argument to get_azure_token and get_managed_token, which controls whether to cache tokens. Set this to FALSE to skip reading cached credentials from disk, and to skip saving credentials to the cache.
Make decode_jwt a generic, with methods for character strings, AzureToken objects and httr::Token objects.
Add extract_jwt generic to get the actual token from within an R object, with methods for character strings, AzureToken objects and httr::Token objects.
Fix bug in checking the expiry time for AAD v2.0 tokens.
Extend get_managed_token to work from within Azure Functions.
Refactor the underlying classes to represent authentication flows, which have a much greater impact on the program logic than AAD version. In place of AzureTokenV1 and AzureTokenV2 classes, there are now AzureTokenAuthCode, AzureTokenDeviceCode, AzureTokenClientCreds, AzureTokenOnBehalfOf, AzureTokenResOwner, and AzureTokenManaged. There should be no user-visible changes in behaviour arising from this.

New get_managed_token function to obtain a token for a managed identity. Note this only works within a VM, service or container to which an identity has been assigned.

Much improved support for authenticating with a certificate. In the certificate argument, specify either the name of a PEM/PFX file, or an AzureKeyVault object representing a cert.
Support providing a path in the aad_host argument, for Azure B2C logins.
Fix bug that prevented token_args argument from being passed to the token endpoint.
If authentication fails using the authorization_code flow, print the AAD error message, if possible.
Add support for the on_behalf_of authorization flow.

Corrections to vignette and readme.
Make prompt to create caching directory more generic, since other AzureR packages will also use it.

Export decode_jwt, a utility function to view the token data.
Force tokens to be cached using version 2 of the RDS format. This is mostly to ensure backward compatibility if the default format used by saveRDS ever changes.