[openssl-users] Help with ssl error
Jason Schultz
jetson23 at hotmail.com
Tue Apr 18 17:28:24 UTC 2017
>From the original question, it appears the server here only supports two cipher suites:
RSA_With_AES_128_CBC_SHA and RSA_With_3DES_EDE_CBC_SHA
This would explain the alert 71, which is the sent because there are no cipher suites in common.
________________________________
From: openssl-users <openssl-users-bounces at openssl.org> on behalf of Viktor Dukhovni <openssl-users at dukhovni.org>
Sent: Tuesday, April 18, 2017 5:06 PM
To: openssl-users at openssl.org
Subject: Re: [openssl-users] Help with ssl error
On Tue, Apr 18, 2017 at 11:17:48AM -0400, Joseph Southwell wrote:
> It doesn’t look like it requested a client certificate to me.
Correct, the server alert was returned immediately in response
to the TLS ClientHello.
> $ openssl s_client -state -msg -connect ftp.echannel.banksys.be:16370 -starttls ftp
> CONNECTED(00000104)
> SSL_connect:before SSL initialization
> >>> ??? [length 0005]
> 16 03 01 00 ab
> >>> TLS 1.2Handshake [length 00ab], ClientHello
> 01 00 00 a7 03 03 b1 9d 3b a7 9d c4 3f de 8a 20
> 59 07 1f d7 50 3e 20 cf 92 cb a6 7d 94 1d 2f b2
> 81 c0 d9 12 1c f9 00 00 38 c0 2c c0 30 00 9f cc
> a9 cc a8 cc aa c0 2b c0 2f 00 9e c0 24 c0 28 00
> 6b c0 23 c0 27 00 67 c0 0a c0 14 00 39 c0 09 c0
> 13 00 33 00 9d 00 9c 00 3d 00 3c 00 35 00 2f 00
> ff 01 00 00 46 00 0b 00 04 03 00 01 02 00 0a 00
> 0a 00 08 00 1d 00 17 00 19 00 18 00 23 00 00 00
> 0d 00 20 00 1e 06 01 06 02 06 03 05 01 05 02 05
> 03 04 01 04 02 04 03 03 01 03 02 03 03 02 01 02
> 02 02 03 00 16 00 00 00 17 00 00
> SSL_connect:SSLv3/TLS write client hello
> <<< ??? [length 0005]
> 15 03 02 00 02
> <<< TLS 1.2Alert [length 0002], fatal insufficient_security
> 02 47
> SSL3 alert read:fatal:insufficient security
> SSL_connect:error in SSLv3/TLS write client hello
> 3252:error:1409442F:SSL routines:ssl3_read_bytes:tlsv1 alert insufficient security:ssl\record\rec_layer_s3.c:1385:SSL alert number 71
The ClientHello decodes via tshark as:
Secure Sockets Layer
SSL Record Layer: Handshake Protocol: Client Hello
Content Type: Handshake (22)
Version: TLS 1.0 (0x0301)
Length: 171
Handshake Protocol: Client Hello
Handshake Type: Client Hello (1)
Length: 167
Version: TLS 1.2 (0x0303)
Random
GMT Unix Time: Jun 5, 2064 16:07:35.000000000 AEST
Random Bytes: 9dc43fde8a2059071fd7503e20cf92cba67d941d2fb281c0...
Session ID Length: 0
Cipher Suites Length: 56
Cipher Suites (28 suites)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)
Cipher Suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x009f)
Cipher Suite: Unknown (0xcca9)
Cipher Suite: Unknown (0xcca8)
Cipher Suite: Unknown (0xccaa)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
Cipher Suite: TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 (0x009e)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (0xc024)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)
Cipher Suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (0x006b)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)
Cipher Suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (0x0067)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)
Cipher Suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x0039)
Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009)
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)
Cipher Suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x0033)
Cipher Suite: TLS_RSA_WITH_AES_256_GCM_SHA384 (0x009d)
Cipher Suite: TLS_RSA_WITH_AES_128_GCM_SHA256 (0x009c)
Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA256 (0x003d)
Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA256 (0x003c)
Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA (0x0035)
Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f)
Cipher Suite: TLS_EMPTY_RENEGOTIATION_INFO_SCSV (0x00ff)
Compression Methods Length: 1
Compression Methods (1 method)
Compression Method: null (0)
Extensions Length: 70
Extension: ec_point_formats
Type: ec_point_formats (0x000b)
Length: 4
EC point formats Length: 3
Elliptic curves point formats (3)
EC point format: uncompressed (0)
EC point format: ansiX962_compressed_prime (1)
EC point format: ansiX962_compressed_char2 (2)
Extension: elliptic_curves
Type: elliptic_curves (0x000a)
Length: 10
Elliptic Curves Length: 8
Elliptic curves (4 curves)
Elliptic curve: Unknown (0x001d)
Elliptic curve: secp256r1 (0x0017)
Elliptic curve: secp521r1 (0x0019)
Elliptic curve: secp384r1 (0x0018)
Extension: SessionTicket TLS
Type: SessionTicket TLS (0x0023)
Length: 0
Data (0 bytes)
Extension: signature_algorithms
Type: signature_algorithms (0x000d)
Length: 32
Signature Hash Algorithms Length: 30
Signature Hash Algorithms (15 algorithms)
Signature Hash Algorithm: 0x0601
Signature Hash Algorithm Hash: SHA512 (6)
Signature Hash Algorithm Signature: RSA (1)
Signature Hash Algorithm: 0x0602
Signature Hash Algorithm Hash: SHA512 (6)
Signature Hash Algorithm Signature: DSA (2)
Signature Hash Algorithm: 0x0603
Signature Hash Algorithm Hash: SHA512 (6)
Signature Hash Algorithm Signature: ECDSA (3)
Signature Hash Algorithm: 0x0501
Signature Hash Algorithm Hash: SHA384 (5)
Signature Hash Algorithm Signature: RSA (1)
Signature Hash Algorithm: 0x0502
Signature Hash Algorithm Hash: SHA384 (5)
Signature Hash Algorithm Signature: DSA (2)
Signature Hash Algorithm: 0x0503
Signature Hash Algorithm Hash: SHA384 (5)
Signature Hash Algorithm Signature: ECDSA (3)
Signature Hash Algorithm: 0x0401
Signature Hash Algorithm Hash: SHA256 (4)
Signature Hash Algorithm Signature: RSA (1)
Signature Hash Algorithm: 0x0402
Signature Hash Algorithm Hash: SHA256 (4)
Signature Hash Algorithm Signature: DSA (2)
Signature Hash Algorithm: 0x0403
Signature Hash Algorithm Hash: SHA256 (4)
Signature Hash Algorithm Signature: ECDSA (3)
Signature Hash Algorithm: 0x0301
Signature Hash Algorithm Hash: SHA224 (3)
Signature Hash Algorithm Signature: RSA (1)
Signature Hash Algorithm: 0x0302
Signature Hash Algorithm Hash: SHA224 (3)
Signature Hash Algorithm Signature: DSA (2)
Signature Hash Algorithm: 0x0303
Signature Hash Algorithm Hash: SHA224 (3)
Signature Hash Algorithm Signature: ECDSA (3)
Signature Hash Algorithm: 0x0201
Signature Hash Algorithm Hash: SHA1 (2)
Signature Hash Algorithm Signature: RSA (1)
Signature Hash Algorithm: 0x0202
Signature Hash Algorithm Hash: SHA1 (2)
Signature Hash Algorithm Signature: DSA (2)
Signature Hash Algorithm: 0x0203
Signature Hash Algorithm Hash: SHA1 (2)
Signature Hash Algorithm Signature: ECDSA (3)
Extension: Unknown 22
Type: Unknown (0x0016)
Length: 0
Data (0 bytes)
Extension: Unknown 23
Type: Unknown (0x0017)
Length: 0
Data (0 bytes)
The code-points unknown to the version of tshark used are:
- Cipher 0xcca9: ECDHE-ECDSA-Chacha20-Poly1305-SHA256
- Cipher 0xcca8: ECDHE-RSA-Chacha20-Poly1305-SHA256
- Cipher 0xccaa: DHE-RSA-Chacha20-Poly1305-SHA256
- Elliptic curve 0x1d: ECDH_x25519
- Extension 22: encrypt-then-mac
- Extension 23: extended-master-secret
This is a modern ClientHello (OpenSSL 1.1.0 it seems) and should
be broadly interoperable. The DEFAULT cipherlist includes only
AES, is there a chance that the server only supports RC4 and/or
3DES?
Try:
$ openssl s_client -state -msg -cipher ALL \
-connect ftp.echannel.banksys.be:16370 -starttls ftp
Capture a PCAP file of the traffic with
# tcpdump -s0 -w /some/file tcp port 16370
and post the the decode from:
$ tshark -r /tmp/p2 -d tcp.port==16370,ssl -V |
sed -ne '/^Secure Sockets Layer/,/^$/p'
Or just attach the PCAP file to your follow-up message.
--
Viktor.
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