1st code commit

.Rbuildignore

@@ -6,6 +6,7 @@
 ^\.Rproj\.user$
 .travis.yml
 CONTRIBUTING.md
+CODE_OF_CONDUCT.md
 drat.sh
 ^LICENSE\.md$
 azure-pipelines.yml

CONTRIBUTING.md

@@ -1,14 +1,13 @@
-
-# Contributing
-
-This project welcomes contributions and suggestions.  Most contributions require you to agree to a
-Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
-the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.
-
-When you submit a pull request, a CLA bot will automatically determine whether you need to provide
-a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions
-provided by the bot. You will only need to do this once across all repos using our CLA.
-
-This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
-For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
-contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
+# Contributing
+
+This project welcomes contributions and suggestions.  Most contributions require you to agree to a
+Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
+the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.
+
+When you submit a pull request, a CLA bot will automatically determine whether you need to provide
+a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions
+provided by the bot. You will only need to do this once across all repos using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
+For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
+contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.

DESCRIPTION

@@ -0,0 +1,23 @@
+Package: AzureVMmetadata
+Title: Interface to Azure virtual machine instance metadata
+Version: 0.0.1
+Authors@R: c(
+    person("Hong", "Ooi", , "hongooi@microsoft.com", role = c("aut", "cre")),
+    person("Microsoft", role="cph")
+    )
+Description: A simple interface to the instance metadata inside a virtual machine running in Microsoft's 'Azure' cloud. Part of the 'AzureR' family of packages.
+URL: https://github.com/Azure/AzureVMmetadata https://github.com/Azure/AzureR
+BugReports: https://github.com/Azure/AzureVMmetadata/issues
+License: MIT + file LICENSE
+VignetteBuilder: knitr
+Depends: 
+    R (>= 3.3)
+Imports: 
+    openssl,
+    httr (>= 1.3)
+Suggests:
+    knitr,
+    testthat,
+    AzureAuth
+Roxygen: list(markdown=TRUE)
+RoxygenNote: 6.1.1

NAMESPACE

@@ -0,0 +1,7 @@
+# Generated by roxygen2: do not edit by hand
+
+export(attested)
+export(in_azure_vm)
+export(instance)
+export(update_attested_metadata)
+export(update_instance_metadata)

R/AzureVMmetadata.R

@@ -0,0 +1,92 @@
+host <- httr::parse_url("http://169.254.169.254")
+inst_api_version <- "2019-02-01"
+att_api_version <- "2018-10-01"
+ev_api_version <- "2017-11-01"
+
+
+#' @export
+instance <- new.env()
+
+#' @export
+attested <- new.env()
+
+#' @export
+events <- new.env()
+
+
+#' @export
+update_instance_metadata <- function()
+{
+    host$path <- "metadata/instance"
+    host$query <- list(`api-version`=att_api_version)
+    res <- try(httr::GET(host, httr::add_headers(metadata=TRUE)), silent=TRUE)
+
+    if(!inherits(res, "response") || res$status_code > 299)
+        return(NULL)
+
+    inst <- httr::content(res)
+    for(x in names(inst))
+        instance[[x]] <- inst[[x]]
+    invisible(inst)
+}
+
+
+#' @export
+update_attested_metadata <- function(nonce=NULL)
+{
+    host$path <- "metadata/attested/document"
+    host$query <- list(`api-version`=att_api_version)
+    res <- try(httr::GET(host, httr::add_headers(metadata=TRUE, nonce=nonce)), silent=TRUE)
+
+    if(!inherits(res, "response") || res$status_code > 299)
+        return(NULL)
+
+    att <- httr::content(res)
+    for(x in names(att))
+        attested[[x]] <- att[[x]]
+    invisible(att)
+}
+
+
+#' @export
+update_scheduled_events <- function()
+{
+    host$path <- "metadata/scheduledevents"
+    host$query <- list(`api-version`=ev_api_version)
+    res <- try(httr::GET(host, httr::add_headers(metadata=TRUE)), silent=TRUE)
+
+    if(!inherits(res, "response") || res$status_code > 299)
+        return(NULL)
+
+    ev <- httr::content(res)
+    for(x in names(ev))
+        events[[x]] <- ev[[x]]
+    invisible(ev)
+}
+
+
+
+#' @export
+get_vm_cert <- function()
+{
+    if(is.null(attested$signature))
+        return(NULL)
+
+    openssl::read_p7b(openssl::base64_decode(attested$signature))[[1]]
+}
+
+
+#' @export
+in_azure_vm <- function()
+{
+    obj <- try(httr::GET(host), silent=TRUE)
+    inherits(obj, "response") && httr::status_code(obj) == 400
+}
+
+
+.onLoad <- function(libname, pkgname)
+{
+    update_instance_metadata()
+    update_attested_metadata()
+}
+