HTTPS request with HTTPoison

bender

Hello.

I spent a day trying manage this wall, but didn’t successed. When I send a request it ends up with an error:

** (HTTPoison.Error) {:tls_alert, {:handshake_failure, 'TLS client: In state hello received SERVER ALERT: Fatal - Handshake Failure\n'}}
    (httpoison 1.8.0) lib/httpoison.ex:156: HTTPoison.request!/5

The same problem is described here HTTPS handshake error: Fatal - Handshake Failure - #11 by rjk but solution didn’t help.

Here is my code:

    rsa_kx = :ssl.cipher_suites(:all, :"tlsv1.2") ++ [%{key_exchange: :rsa, cipher: :aes_256_cbc, mac: :sha256}]

    HTTPoison.get!("https://etpgpb.ru/procedures.json", [],
      ssl: [
        ciphers: rsa_kx,
        verify: :verify_peer,
        cacertfile: :certifi.cacertfile(),
        depth: 3,
        customize_hostname_check: [
          match_fun: :public_key.pkix_verify_hostname_match_fun(:https)
        ]
      ],
      log_level: :debug
    )

Also some details from nmap and curl.

nmap:

PORT    STATE SERVICE
443/tcp open  https
| ssl-enum-ciphers: 
|   TLSv1.0: 
|     ciphers: 
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: server
|     warnings: 
|       Forward Secrecy not supported by any cipher
|   TLSv1.1: 
|     ciphers: 
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: server
|     warnings: 
|       Forward Secrecy not supported by any cipher
|   TLSv1.2: 
|     ciphers: 
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: server
|     warnings: 
|       Forward Secrecy not supported by any cipher
|_  least strength: A

curl:

* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / AES128-SHA

5 comments

#httpoison #hackney

0 2676 5

2021-12-12 07:10:36 UTC

Marked As Solved

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voltone

The server only supports TLS_RSA_WITH_AES_128_CBC_SHA and TLS_RSA_WITH_AES_256_CBC_SHA, which in :ssl terms would be:

iex(1)> supported = Enum.map(['TLS_RSA_WITH_AES_128_CBC_SHA', 'TLS_RSA_WITH_AES_256_CBC_SHA'], &:ssl.str_to_suite/1)
[                                                           
  %{cipher: :aes_128_cbc, key_exchange: :rsa, mac: :sha, prf: :default_prf},
  %{cipher: :aes_256_cbc, key_exchange: :rsa, mac: :sha, prf: :default_prf}
]

Not only are those cipher suites not enabled by default, they are not supported by :ssl unless you explicitly downgrade the TLS version to 1.1. If a newer version of TLS is active, the initial handshake message to the server will optimistically try to negotiate the newest version, and it won’t offer those old (deprecated) cipher suites.

So after running the above, this will work (using :hackney_ssl.check_hostname_opts/1 to ensure all the other options are set correctly):

iex(2)> check_hostname_opts = :hackney_ssl.check_hostname_opts('etpgpb.ru')
# ...
iex(3)> ssl_opts = Keyword.merge(check_hostname_opts, ciphers: supported, versions: [:"tlsv1.1"])
# ...
iex(3)> HTTPoison.get!("https://etpgpb.ru/procedures.json", [], ssl: ssl_opts)
%HTTPoison.Response{
  #...
  status_code: 200
}

Post #5