R negotiate authentication (with RCurl or Httr)

Question

I am trying to access a web service from R using RCurl. The web service uses Kerberos authentication.

Testing using curl on the command line works fine e.g.

curl --negotiate -u: http://reuxeuls199:8084/reports-ws/api/r/1.0/vesselTracking?region-name=ECC&start-date-time=01/10/2014

However in R I am unable to make it work.

ReportsProdURL <- "http://reuxeuls199:8084/reports-ws/api/r/1.0/vesselTracking?region-    name=ECC&start-date-time=01/10/2014"
URL <- getURL(ReportsProdURL, verbose=TRUE, .opts=curlOptions(username=":"))

I also tried using the httpauth option set to gssnegotiate, but that fails also.

What does the output from using the `verbose` option (that you're using) produce? — hrbrmstr, Oct 08 '14 at 11:41
What happens on the console? How does it get your username and password? — hadley, Oct 08 '14 at 17:23

score 3 · Answer 1 · answered May 09 '18 at 02:54

3

Using httr,

httr::GET(ReportsProdURL, 
    authenticate(":", "", type="gssnegotiate"))

And if no proxy is required for an internal website, then

httr::GET(ReportsProdURL, 
    use_proxy(""), 
    authenticate(":", "", type="gssnegotiate"))

answered May 09 '18 at 02:54

chinsoon12

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score 1 · Answer 2 · edited May 23 '17 at 10:27

1

I have not found out how to do it with RCurl but with httr you can use

GET("https://host.domain/",authenticate("username","password","gssnegotiate"))

In case you are using a self signed certificate you can run the command

set_config( config( ssl.verifypeer = 0L ) )

To disable certificate validation for the underlying libcurl library

edited May 23 '17 at 10:27

Community

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answered Oct 15 '15 at 01:57

Luxspes

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score 1 · Answer 3 · answered Nov 04 '16 at 15:53

1

With RCurl, for NEGOTIATE, use this:

getURL("https://yourAddress", userpwd=":", httpauth = 4)

The number 4 ist based on a bitmask of constants defined in curl.h. Valid options are defined here.

answered Nov 04 '16 at 15:53

tine2k

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R negotiate authentication (with RCurl or Httr)

3 Answers3