[openssl-dev] [openssl.org #4600] Core dump when using -keymatexport and receiving a handshake alert

[Hubert Kario via RT]

when s_client receives alert during handshake and is configured to
export keying material, it will crash with a segmentation fault

current 1.0.2 and master are affected

reproducer:
openssl s_client -keymatexport EXPORT-label -connect google.com:443 -cipher IDEA

Result:
CONNECTED(00000003)
140315545597592:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure:s23_clnt.c:769:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 99 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID: 
    Session-ID-ctx: 
    Master-Key: 
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1467213777
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
Keying material exporter:
    Label: 'EXPORT-label'
    Length: 20 bytes
Segmentation fault (core dumped)
-- 
Regards,
Hubert Kario
Senior Quality Engineer, QE BaseOS Security team
Web: www.cz.redhat.com
Red Hat Czech s.r.o., Purkyňova 99/71, 612 45, Brno, Czech Republic
-- 
Ticket here: http://rt.openssl.org/Ticket/Display.html?id=4600
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