Tools to work with the Google DNS over HTTPS API in R https://cinc.rud.is/web/packages/gdns/
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README.md

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gdns : Tools to work with the Google DNS over HTTPS API

Traditional DNS queries and responses are sent over UDP or TCP without encryption. This is vulnerable to eavesdropping and spoofing (including DNS-based Internet filtering). Responses from recursive resolvers to clients are the most vulnerable to undesired or malicious changes, while communications between recursive resolvers and authoritative nameservers often incorporate additional protection.

To address this problem, Google Public DNS offers DNS resolution over an encrypted HTTPS connection. DNS-over-HTTPS greatly enhances privacy and security between a client and a recursive resolver, and complements DNSSEC to provide end-to-end authenticated DNS lookups.

More info at https://developers.google.com/speed/public-dns/docs/dns-over-https.

The following functions are implemented:

  • bulk_query: Vectorized query, returning only answers in a data frame
  • has_spf: Test for whether a DNS TXT record is an SPF record
  • is_hard_fail: SPF “all” type test
  • is_soft_fail: SPF “all” type test
  • passes_all: SPF “all” type test
  • query: Perform DNS over HTTPS queries using Google
  • spf_exists: SPF field extraction functions
  • spf_includes: SPF field extraction functions
  • spf_ipv4s: SPF field extraction functions
  • spf_ipv6s: SPF field extraction functions
  • spf_ptrs: SPF field extraction functions
  • split_spf: Split out all SPF records in a domain’s TXT record

Installation

devtools::install_github("hrbrmstr/gdns")

Usage

library(gdns)

# current verison
packageVersion("gdns")
#> [1] '0.3.1'

str(query("rud.is"))
#> List of 10
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi FALSE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "rud.is."
#>   ..$ type: int 1
#>  $ Answer            :'data.frame':  1 obs. of  4 variables:
#>   ..$ name: chr "rud.is."
#>   ..$ type: int 1
#>   ..$ TTL : int 1152
#>   ..$ data: chr "104.236.112.222"
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"

str(query("example.com", "255")) # "ANY" query
#> List of 10
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi TRUE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "example.com."
#>   ..$ type: int 255
#>  $ Answer            :'data.frame':  20 obs. of  4 variables:
#>   ..$ name: chr [1:20] "example.com." "example.com." "example.com." "example.com." ...
#>   ..$ type: int [1:20] 6 46 47 46 2 2 46 28 46 1 ...
#>   ..$ TTL : int [1:20] 3562 3562 3562 21562 21562 21562 21562 21562 21562 21562 ...
#>   ..$ data: chr [1:20] "sns.dns.icann.org. noc.dns.icann.org. 2018080125 7200 3600 1209600 3600" "nsec 8 2 3600 1538855995 1537006806 63855 example.com. pFyGCdsJ2uw2FcRlszW1VuM6FRV1rHbBfeBmp/Jaecdth8njienGYt2k"| __truncated__ "www.example.com. A NS SOA TXT AAAA RRSIG NSEC DNSKEY" "ns 8 2 86400 1538826642 1537014006 63855 example.com. U7KJg6I3XylL5aT10B3tHw9MIV8QoHBlmzO3CwghRh4I00ZzF2IgjakMp"| __truncated__ ...
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"

str(query("microsoft.com", "MX"))
#> List of 11
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi FALSE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "microsoft.com."
#>   ..$ type: int 15
#>  $ Answer            :'data.frame':  1 obs. of  4 variables:
#>   ..$ name: chr "microsoft.com."
#>   ..$ type: int 15
#>   ..$ TTL : int 3599
#>   ..$ data: chr "10 microsoft-com.mail.protection.outlook.com."
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"
#>  $ Comment           : chr "Response from 208.76.45.53."

str(query("google-public-dns-a.google.com", "TXT"))
#> List of 10
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi FALSE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "google-public-dns-a.google.com."
#>   ..$ type: int 16
#>  $ Answer            :'data.frame':  1 obs. of  4 variables:
#>   ..$ name: chr "google-public-dns-a.google.com."
#>   ..$ type: int 16
#>   ..$ TTL : int 21432
#>   ..$ data: chr "\"http://xkcd.com/1361/\""
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"

str(query("apple.com"))
#> List of 10
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi FALSE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "apple.com."
#>   ..$ type: int 1
#>  $ Answer            :'data.frame':  3 obs. of  4 variables:
#>   ..$ name: chr [1:3] "apple.com." "apple.com." "apple.com."
#>   ..$ type: int [1:3] 1 1 1
#>   ..$ TTL : int [1:3] 2635 2635 2635
#>   ..$ data: chr [1:3] "17.172.224.47" "17.178.96.59" "17.142.160.59"
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"

str(query("17.142.160.59", "PTR"))
#> List of 10
#>  $ Status            : int 0
#>  $ TC                : logi FALSE
#>  $ RD                : logi TRUE
#>  $ RA                : logi TRUE
#>  $ AD                : logi FALSE
#>  $ CD                : logi FALSE
#>  $ Question          :'data.frame':  1 obs. of  2 variables:
#>   ..$ name: chr "59.160.142.17.in-addr.arpa."
#>   ..$ type: int 12
#>  $ Answer            :'data.frame':  5 obs. of  4 variables:
#>   ..$ name: chr [1:5] "59.160.142.17.in-addr.arpa." "59.160.142.17.in-addr.arpa." "59.160.142.17.in-addr.arpa." "59.160.142.17.in-addr.arpa." ...
#>   ..$ type: int [1:5] 12 12 12 12 12
#>   ..$ TTL : int [1:5] 3588 3588 3588 3588 3588
#>   ..$ data: chr [1:5] "apple.by." "apple.com." "pv-apple-com.apple.com." "ipad.host." ...
#>  $ Additional        : list()
#>  $ edns_client_subnet: chr "0.0.0.0/0"

hosts <- c("rud.is", "dds.ec", "r-project.org", "rstudio.com", "apple.com")

gdns::bulk_query(hosts)
#>             name type  TTL            data        entity
#> 1        rud.is.    1 1151 104.236.112.222        rud.is
#> 2        dds.ec.    1  599    185.53.178.9        dds.ec
#> 3 r-project.org.    1 7031   137.208.57.37 r-project.org
#> 4   rstudio.com.    1 3431   104.196.200.5   rstudio.com
#> 5     apple.com.    1 2718    17.178.96.59     apple.com
#> 6     apple.com.    1 2718   17.142.160.59     apple.com
#> 7     apple.com.    1 2718   17.172.224.47     apple.com

Test Results

library(gdns)
library(testthat)

date()
#> [1] "Sun Sep 16 13:23:55 2018"

test_dir("tests/")
#> ✔ | OK F W S | Context
#> ══ testthat results  ═════════════════════════════════════════════════════════════════════════════════════════
#> OK: 2 SKIPPED: 0 FAILED: 0
#> 
#> ══ Results ═══════════════════════════════════════════════════════════════════════════════════════════════════
#> Duration: 0.4 s
#> 
#> OK:       0
#> Failed:   0
#> Warnings: 0
#> Skipped:  0

Code of Conduct

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.