[openssl-users] How to respond to TLS heartbeat in openssl
Keshava Krishna Bhat K
keshavkrishna88 at gmail.com
Fri Dec 22 06:32:48 UTC 2017
Ok, I got to know that
openssl version -a gives out the flags used while building openssl.
so the output of this was
OpenSSL 1.0.2g 1 Mar 2016
built on: reproducible build, date unspecified
options: bn(64,64) rc4(16x,int) des(idx,cisc,16,int) blowfish(idx)
compiler: cc -I. -I.. -I../include -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS
-D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -g -O2
-fstack-protector-strong -Wformat -Werror=format-security -Wdate-time
-D_FORTIFY_SOURCE=2 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wa,--noexecstack
-Wall -DMD32_REG_T=int -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT
-DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM
-DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM
Since the putput above does not have OPENSSL_NO_HEARTBEATS, I assume
heartbeats are not disabled in the build.
So I am back to square one :( -> how do I make the server respond to a TLS
heartbeat request ? Do I have to read the packet and write it back ?
But code in the following file and method suggests this would done
automatically (but again I have a layman's knowledge on C, I could be wrong)
On Thu, Dec 21, 2017 at 11:49 AM, Keshava Krishna Bhat K <
keshavkrishna88 at gmail.com> wrote:
> Is this controlled by the Makefile?
> On Wed, Dec 20, 2017 at 6:20 PM, Keshava Krishna Bhat K <
> keshavkrishna88 at gmail.com> wrote:
>> Hi All,
>> I am writing a TLS server that responds to a incoming TLS heartbeat
>> request. I am using OpenSSL 1.0.2g .
>> But I am not able to get the server respond to a hearbeat request.
>> Any clue on what I am missing?
>> The code snippets are here https://stackoverflow.com
>> /questions/47902283/how-to-respond-to-tls-heartbeat-in-openssl .
>> I also got a clue that the version of openssl I am using might have
>> hearbeats disabled. But how do I check if heartbeats are enabled in OpenSSL
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the openssl-users