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Subject: Failed to exchange encryption keys when connect to Debian

Failed to exchange encryption keys when connect to Debian

From: Moti Avrahami <moti.dp_at_gmail.com>
Date: Tue, 28 Jun 2016 12:34:04 +0300

Hi,

I failed to connect to the SFTP server – SSH-2.0-OpenSSH_6.0p1
Debian-4+deb7u4.

I am using curl.exe (7.47.1) with libssh2 (1.7.0) and openSSL (0.9.8) and
get the error:

[libssh2] 0.506250 Failure Event: -5 - Unable to exchange encryption keys

* Failure establishing ssh session

Do you know what can be the cause?

Maybe this doesn’t support the libssh2 algorithms?

Thanks,

Moti

By the way, this is the full trace:

[libssh2] 0.459375 Conn: Setting blocking mode OFF

[libssh2] 0.459375 Transport: session_startup for socket 156

[libssh2] 0.459375 Transport: Sending Banner: SSH-2.0-libssh2_1.7.0

[libssh2] 0.459375 Socket: Sent 23/23 bytes at 004DA6C0+0

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Socket: Recved 1 bytes banner

[libssh2] 0.537500 Transport: Received Banner: SSH-2.0-OpenSSH_6.0p1
Debian-4+deb7u4

[libssh2] 0.615625 Key Ex: Sent KEX:
diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

[libssh2] 0.615625 Key Ex: Sent HOSTKEY: ssh-rsa,ssh-dss

[libssh2] 0.615625 Key Ex: Sent CRYPT_CS: aes256-cbc,
rijndael-cbc_at_lysator.liu.se
,aes192-cbc,aes128-cbc,blowfish-cbc,arcfour128,arcfour,cast128-cbc,3des-cbc

[libssh2] 0.615625 Key Ex: Sent CRYPT_SC: aes256-cbc,
rijndael-cbc_at_lysator.liu.se
,aes192-cbc,aes128-cbc,blowfish-cbc,arcfour128,arcfour,cast128-cbc,3des-cbc

[libssh2] 0.615625 Key Ex: Sent MAC_CS:
hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96,hmac-ripemd160,
hmac-ripemd160_at_openssh.com

[libssh2] 0.615625 Key Ex: Sent MAC_SC:
hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96,hmac-ripemd160,
hmac-ripemd160_at_openssh.com

[libssh2] 0.615625 Key Ex: Sent COMP_CS: none

[libssh2] 0.615625 Key Ex: Sent COMP_SC: none

[libssh2] 0.615625 Key Ex: Sent LANG_CS:

[libssh2] 0.615625 Key Ex: Sent LANG_SC:

=> libssh2_transport_write plain (663 bytes)

0000: 14 30 B0 BB FA 02 DA BC 09 75 DA 15 A5 20 E6 B2 : .0°»ת..¼
u..¥ ז²

0010: 80 00 00 00 7E 64 69 66 66 69 65 2D 68 65 6C 6C : ....~diffie-hell

0020: 6D 61 6E 2D 67 72 6F 75 70 2D 65 78 63 68 61 6E : man-group-exchan

0030: 67 65 2D 73 68 61 32 35 36 2C 64 69 66 66 69 65 : ge-sha256,diffie

0040: 2D 68 65 6C 6C 6D 61 6E 2D 67 72 6F 75 70 2D 65 : -hellman-group-e

0050: 78 63 68 61 6E 67 65 2D 73 68 61 31 2C 64 69 66 : xchange-sha1,dif

0060: 66 69 65 2D 68 65 6C 6C 6D 61 6E 2D 67 72 6F 75 : fie-hellman-grou

0070: 70 31 34 2D 73 68 61 31 2C 64 69 66 66 69 65 2D : p14-sha1,diffie-

0080: 68 65 6C 6C 6D 61 6E 2D 67 72 6F 75 70 31 2D 73 : hellman-group1-s

0090: 68 61 31 00 00 00 0F 73 73 68 2D 72 73 61 2C 73 : ha1....ssh-rsa,s

00a0: 73 68 2D 64 73 73 00 00 00 71 61 65 73 32 35 36 : sh-dss...qaes256

00b0: 2D 63 62 63 2C 72 69 6A 6E 64 61 65 6C 2D 63 62 : -cbc,rijndael-cb

00c0: 63 40 6C 79 73 61 74 6F 72 2E 6C 69 75 2E 73 65 : c_at_lysator.liu.se

00d0: 2C 61 65 73 31 39 32 2D 63 62 63 2C 61 65 73 31 : ,aes192-cbc,aes1

00e0: 32 38 2D 63 62 63 2C 62 6C 6F 77 66 69 73 68 2D : 28-cbc,blowfish-

00f0: 63 62 63 2C 61 72 63 66 6F 75 72 31 32 38 2C 61 : cbc,arcfour128,a

0100: 72 63 66 6F 75 72 2C 63 61 73 74 31 32 38 2D 63 : rcfour,cast128-c

0110: 62 63 2C 33 64 65 73 2D 63 62 63 00 00 00 71 61 : bc,3des-cbc...qa

0120: 65 73 32 35 36 2D 63 62 63 2C 72 69 6A 6E 64 61 : es256-cbc,rijnda

0130: 65 6C 2D 63 62 63 40 6C 79 73 61 74 6F 72 2E 6C : el-cbc_at_lysator.l

0140: 69 75 2E 73 65 2C 61 65 73 31 39 32 2D 63 62 63 : iu.se,aes192-cbc

0150: 2C 61 65 73 31 32 38 2D 63 62 63 2C 62 6C 6F 77 : ,aes128-cbc,blow

0160: 66 69 73 68 2D 63 62 63 2C 61 72 63 66 6F 75 72 : fish-cbc,arcfour

0170: 31 32 38 2C 61 72 63 66 6F 75 72 2C 63 61 73 74 : 128,arcfour,cast

0180: 31 32 38 2D 63 62 63 2C 33 64 65 73 2D 63 62 63 : 128-cbc,3des-cbc

0190: 00 00 00 71 68 6D 61 63 2D 73 68 61 32 2D 32 35 : ...qhmac-sha2-25

01a0: 36 2C 68 6D 61 63 2D 73 68 61 32 2D 35 31 32 2C : 6,hmac-sha2-512,

01b0: 68 6D 61 63 2D 73 68 61 31 2C 68 6D 61 63 2D 73 : hmac-sha1,hmac-s

01c0: 68 61 31 2D 39 36 2C 68 6D 61 63 2D 6D 64 35 2C : ha1-96,hmac-md5,

01d0: 68 6D 61 63 2D 6D 64 35 2D 39 36 2C 68 6D 61 63 : hmac-md5-96,hmac

01e0: 2D 72 69 70 65 6D 64 31 36 30 2C 68 6D 61 63 2D : -ripemd160,hmac-

01f0: 72 69 70 65 6D 64 31 36 30 40 6F 70 65 6E 73 73 : ripemd160_at_openss

0200: 68 2E 63 6F 6D 00 00 00 71 68 6D 61 63 2D 73 68 : h.com...qhmac-sh

0210: 61 32 2D 32 35 36 2C 68 6D 61 63 2D 73 68 61 32 : a2-256,hmac-sha2

0220: 2D 35 31 32 2C 68 6D 61 63 2D 73 68 61 31 2C 68 : -512,hmac-sha1,h

0230: 6D 61 63 2D 73 68 61 31 2D 39 36 2C 68 6D 61 63 : mac-sha1-96,hmac

0240: 2D 6D 64 35 2C 68 6D 61 63 2D 6D 64 35 2D 39 36 : -md5,hmac-md5-96

0250: 2C 68 6D 61 63 2D 72 69 70 65 6D 64 31 36 30 2C : ,hmac-ripemd160,

0260: 68 6D 61 63 2D 72 69 70 65 6D 64 31 36 30 40 6F : hmac-ripemd160_at_o

0270: 70 65 6E 73 73 68 2E 63 6F 6D 00 00 00 04 6E 6F : penssh.com....no

0280: 6E 65 00 00 00 04 6E 6F 6E 65 00 00 00 00 00 00 : ne....none......

0290: 00 00 00 00 00 00 00 : .......

[libssh2] 0.615625 Socket: Sent 832/832 bytes at 021D393C

=> libssh2_transport_write send() (832 bytes)

0000: 00 00 03 3C A4 14 30 B0 BB FA 02 DA BC 09 75 DA : ...<..0°»ת..¼
u.

0010: 15 A5 20 E6 B2 80 00 00 00 7E 64 69 66 66 69 65 : .¥ ז²....~diffie

0020: 2D 68 65 6C 6C 6D 61 6E 2D 67 72 6F 75 70 2D 65 : -hellman-group-e

0030: 78 63 68 61 6E 67 65 2D 73 68 61 32 35 36 2C 64 : xchange-sha256,d

0040: 69 66 66 69 65 2D 68 65 6C 6C 6D 61 6E 2D 67 72 : iffie-hellman-gr

0050: 6F 75 70 2D 65 78 63 68 61 6E 67 65 2D 73 68 61 : oup-exchange-sha

0060: 31 2C 64 69 66 66 69 65 2D 68 65 6C 6C 6D 61 6E : 1,diffie-hellman

0070: 2D 67 72 6F 75 70 31 34 2D 73 68 61 31 2C 64 69 : -group14-sha1,di

0080: 66 66 69 65 2D 68 65 6C 6C 6D 61 6E 2D 67 72 6F : ffie-hellman-gro

0090: 75 70 31 2D 73 68 61 31 00 00 00 0F 73 73 68 2D : up1-sha1....ssh-

00a0: 72 73 61 2C 73 73 68 2D 64 73 73 00 00 00 71 61 : rsa,ssh-dss...qa

00b0: 65 73 32 35 36 2D 63 62 63 2C 72 69 6A 6E 64 61 : es256-cbc,rijnda

00c0: 65 6C 2D 63 62 63 40 6C 79 73 61 74 6F 72 2E 6C : el-cbc_at_lysator.l

00d0: 69 75 2E 73 65 2C 61 65 73 31 39 32 2D 63 62 63 : iu.se,aes192-cbc

00e0: 2C 61 65 73 31 32 38 2D 63 62 63 2C 62 6C 6F 77 : ,aes128-cbc,blow

00f0: 66 69 73 68 2D 63 62 63 2C 61 72 63 66 6F 75 72 : fish-cbc,arcfour

0100: 31 32 38 2C 61 72 63 66 6F 75 72 2C 63 61 73 74 : 128,arcfour,cast

0110: 31 32 38 2D 63 62 63 2C 33 64 65 73 2D 63 62 63 : 128-cbc,3des-cbc

0120: 00 00 00 71 61 65 73 32 35 36 2D 63 62 63 2C 72 : ...qaes256-cbc,r

0130: 69 6A 6E 64 61 65 6C 2D 63 62 63 40 6C 79 73 61 : ijndael-cbc_at_lysa

0140: 74 6F 72 2E 6C 69 75 2E 73 65 2C 61 65 73 31 39 : tor.liu.se,aes19

0150: 32 2D 63 62 63 2C 61 65 73 31 32 38 2D 63 62 63 : 2-cbc,aes128-cbc

0160: 2C 62 6C 6F 77 66 69 73 68 2D 63 62 63 2C 61 72 : ,blowfish-cbc,ar

0170: 63 66 6F 75 72 31 32 38 2C 61 72 63 66 6F 75 72 : cfour128,arcfour

0180: 2C 63 61 73 74 31 32 38 2D 63 62 63 2C 33 64 65 : ,cast128-cbc,3de

0190: 73 2D 63 62 63 00 00 00 71 68 6D 61 63 2D 73 68 : s-cbc...qhmac-sh

01a0: 61 32 2D 32 35 36 2C 68 6D 61 63 2D 73 68 61 32 : a2-256,hmac-sha2

01b0: 2D 35 31 32 2C 68 6D 61 63 2D 73 68 61 31 2C 68 : -512,hmac-sha1,h

01c0: 6D 61 63 2D 73 68 61 31 2D 39 36 2C 68 6D 61 63 : mac-sha1-96,hmac

01d0: 2D 6D 64 35 2C 68 6D 61 63 2D 6D 64 35 2D 39 36 : -md5,hmac-md5-96

01e0: 2C 68 6D 61 63 2D 72 69 70 65 6D 64 31 36 30 2C : ,hmac-ripemd160,

01f0: 68 6D 61 63 2D 72 69 70 65 6D 64 31 36 30 40 6F : hmac-ripemd160_at_o

0200: 70 65 6E 73 73 68 2E 63 6F 6D 00 00 00 71 68 6D : penssh.com...qhm

0210: 61 63 2D 73 68 61 32 2D 32 35 36 2C 68 6D 61 63 : ac-sha2-256,hmac

0220: 2D 73 68 61 32 2D 35 31 32 2C 68 6D 61 63 2D 73 : -sha2-512,hmac-s

0230: 68 61 31 2C 68 6D 61 63 2D 73 68 61 31 2D 39 36 : ha1,hmac-sha1-96

0240: 2C 68 6D 61 63 2D 6D 64 35 2C 68 6D 61 63 2D 6D : ,hmac-md5,hmac-m

0250: 64 35 2D 39 36 2C 68 6D 61 63 2D 72 69 70 65 6D : d5-96,hmac-ripem

0260: 64 31 36 30 2C 68 6D 61 63 2D 72 69 70 65 6D 64 : d160,hmac-ripemd

0270: 31 36 30 40 6F 70 65 6E 73 73 68 2E 63 6F 6D 00 : 160_at_openssh.com.

0280: 00 00 04 6E 6F 6E 65 00 00 00 04 6E 6F 6E 65 00 : ...none....none.

0290: 00 00 00 00 00 00 00 00 00 00 00 00 44 EC 14 45 : ............Dל.E

02a0: D8 CB 8F 55 8E AA 05 C1 1B 5E F1 C6 CF 83 68 52 : ״..U.×...^ס..ƒhR

02b0: 3A 38 3A FE 39 4E C1 98 A2 BA 7F D0 B4 C4 A9 7C : :8:.9N..¢÷.׀´.©|

02c0: 24 8F 3F 73 40 4D DB 09 D0 C5 6E F4 9B 7E 51 7D : $.?s_at_M. ׀.nפ›~Q}

02d0: 26 67 F7 C3 F3 00 3B 4E AE 5D 50 28 4E D4 A6 6A : &gק.ף.;N®]P(Nװ¦j

02e0: 26 13 3C AF C1 22 17 53 57 05 7E 2E B2 37 79 97 : &.<¯.".SW.~.²7y—

02f0: 19 AA C8 F5 C1 92 70 63 64 F5 F2 F8 D5 88 18 F8 : .×.ץ.’pcdץערױ..ר

0300: 86 3C 7C 58 D4 8D 2C 1E 44 EF CC B7 58 68 B4 DE : †<|Xװ.,.Dן.·Xh´.

0310: 44 21 D9 9C D0 8D AE 9C EA DB 4D 1C 6A F2 FD 46 : D!..׀.®.ך.M.jע.F

0320: 7F A3 1B 45 23 FA 32 CA 7E D3 A6 B8 B4 CC CB 1B : .£.E#ת2.~׃¦¸´...

0330: CD 6E 01 D1 3B 6D 65 B8 BE 69 12 D4 38 E7 08 8E : .n..;me¸¾i.װ8ח..

[libssh2] 0.615625 Transport: Looking for packet of type: 20

  0 0 0 0 0 0 0 0 --:--:-- --:--:--
--:--:-- 0[libssh2] 0.693750 Socket: Recved 392/16384 bytes to
021CF914+0

=> libssh2_transport_read() raw (392 bytes)

0000: 00 00 01 84 07 14 AA 25 A8 63 3D 62 7D 7A 1F AC : ...„..×%¨c=b}z.¬

0010: 96 7D 83 EA 31 9C 00 00 00 5D 65 63 64 68 2D 73 : –}ƒך1....]ecdh-s

0020: 68 61 32 2D 6E 69 73 74 70 35 32 31 2C 65 63 64 : ha2-nistp521,ecd

0030: 68 2D 73 68 61 32 2D 6E 69 73 74 70 33 38 34 2C : h-sha2-nistp384,

0040: 65 63 64 68 2D 73 68 61 32 2D 6E 69 73 74 70 32 : ecdh-sha2-nistp2

0050: 35 36 2C 64 69 66 66 69 65 2D 68 65 6C 6C 6D 61 : 56,diffie-hellma

0060: 6E 2D 67 72 6F 75 70 2D 65 78 63 68 61 6E 67 65 : n-group-exchange

0070: 2D 73 68 61 32 35 36 00 00 00 23 73 73 68 2D 72 : -sha256...#ssh-r

0080: 73 61 2C 73 73 68 2D 64 73 73 2C 65 63 64 73 61 : sa,ssh-dss,ecdsa

0090: 2D 73 68 61 32 2D 6E 69 73 74 70 35 32 31 00 00 : -sha2-nistp521..

00a0: 00 20 61 65 73 32 35 36 2D 63 74 72 2C 61 65 73 : . aes256-ctr,aes

00b0: 31 39 32 2D 63 74 72 2C 61 65 73 31 32 38 2D 63 : 192-ctr,aes128-c

00c0: 74 72 00 00 00 20 61 65 73 32 35 36 2D 63 74 72 : tr... aes256-ctr

00d0: 2C 61 65 73 31 39 32 2D 63 74 72 2C 61 65 73 31 : ,aes192-ctr,aes1

00e0: 32 38 2D 63 74 72 00 00 00 2A 68 6D 61 63 2D 72 : 28-ctr...*hmac-r

00f0: 69 70 65 6D 64 31 36 30 2C 68 6D 61 63 2D 73 68 : ipemd160,hmac-sh

0100: 61 32 2D 32 35 36 2C 68 6D 61 63 2D 73 68 61 32 : a2-256,hmac-sha2

0110: 2D 35 31 32 00 00 00 2A 68 6D 61 63 2D 72 69 70 : -512...*hmac-rip

0120: 65 6D 64 31 36 30 2C 68 6D 61 63 2D 73 68 61 32 : emd160,hmac-sha2

0130: 2D 32 35 36 2C 68 6D 61 63 2D 73 68 61 32 2D 35 : -256,hmac-sha2-5

0140: 31 32 00 00 00 15 6E 6F 6E 65 2C 7A 6C 69 62 40 : 12....none,zlib@

0150: 6F 70 65 6E 73 73 68 2E 63 6F 6D 00 00 00 15 6E : openssh.com....n

0160: 6F 6E 65 2C 7A 6C 69 62 40 6F 70 65 6E 73 73 68 : one,zlib_at_openssh

0170: 2E 63 6F 6D 00 00 00 00 00 00 00 00 00 00 00 00 : .com............

0180: 00 00 00 00 00 00 00 00 : ........

=> libssh2_transport_read() plain (380 bytes)

0000: 14 AA 25 A8 63 3D 62 7D 7A 1F AC 96 7D 83 EA 31 : .×%¨c=b}z.¬–}ƒך1

0010: 9C 00 00 00 5D 65 63 64 68 2D 73 68 61 32 2D 6E : ....]ecdh-sha2-n

0020: 69 73 74 70 35 32 31 2C 65 63 64 68 2D 73 68 61 : istp521,ecdh-sha

0030: 32 2D 6E 69 73 74 70 33 38 34 2C 65 63 64 68 2D : 2-nistp384,ecdh-

0040: 73 68 61 32 2D 6E 69 73 74 70 32 35 36 2C 64 69 : sha2-nistp256,di

0050: 66 66 69 65 2D 68 65 6C 6C 6D 61 6E 2D 67 72 6F : ffie-hellman-gro

0060: 75 70 2D 65 78 63 68 61 6E 67 65 2D 73 68 61 32 : up-exchange-sha2

0070: 35 36 00 00 00 23 73 73 68 2D 72 73 61 2C 73 73 : 56...#ssh-rsa,ss

0080: 68 2D 64 73 73 2C 65 63 64 73 61 2D 73 68 61 32 : h-dss,ecdsa-sha2

0090: 2D 6E 69 73 74 70 35 32 31 00 00 00 20 61 65 73 : -nistp521... aes

00a0: 32 35 36 2D 63 74 72 2C 61 65 73 31 39 32 2D 63 : 256-ctr,aes192-c

00b0: 74 72 2C 61 65 73 31 32 38 2D 63 74 72 00 00 00 : tr,aes128-ctr...

00c0: 20 61 65 73 32 35 36 2D 63 74 72 2C 61 65 73 31 : aes256-ctr,aes1

00d0: 39 32 2D 63 74 72 2C 61 65 73 31 32 38 2D 63 74 : 92-ctr,aes128-ct

00e0: 72 00 00 00 2A 68 6D 61 63 2D 72 69 70 65 6D 64 : r...*hmac-ripemd

00f0: 31 36 30 2C 68 6D 61 63 2D 73 68 61 32 2D 32 35 : 160,hmac-sha2-25

0100: 36 2C 68 6D 61 63 2D 73 68 61 32 2D 35 31 32 00 : 6,hmac-sha2-512.

0110: 00 00 2A 68 6D 61 63 2D 72 69 70 65 6D 64 31 36 : ..*hmac-ripemd16

0120: 30 2C 68 6D 61 63 2D 73 68 61 32 2D 32 35 36 2C : 0,hmac-sha2-256,

0130: 68 6D 61 63 2D 73 68 61 32 2D 35 31 32 00 00 00 : hmac-sha2-512...

0140: 15 6E 6F 6E 65 2C 7A 6C 69 62 40 6F 70 65 6E 73 : .none,zlib_at_opens

0150: 73 68 2E 63 6F 6D 00 00 00 15 6E 6F 6E 65 2C 7A : sh.com....none,z

0160: 6C 69 62 40 6F 70 65 6E 73 73 68 2E 63 6F 6D 00 : lib_at_openssh.com.

0170: 00 00 00 00 00 00 00 00 00 00 00 00 : ............

[libssh2] 0.693750 Transport: Packet type 20 received, length=380

[libssh2] 0.693750 Transport: Looking for packet of type: 20

[libssh2] 0.693750 Failure Event: -5 - Unable to exchange encryption keys

* Failure establishing ssh session

[libssh2] 0.693750 Transport: Freeing session resource

[libssh2] 0.693750 Transport: Extra packets left 0

  0 0 0 0 0 0 0 0 --:--:-- --:--:--
--:--:-- 0

  0 0 0 0 0 0 0 0 --:--:-- --:--:--
--:--:-- 0

* Closing connection 0

curl: (2) Failure establishing ssh session

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libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel
Received on 2016-06-28

the libssh2 team