Score:0

Stunnel Server On CentOS 7 - TLS options: 0x2100000 (+0x0, -0x0) Error

eh flag

I am using CentOS Linux release v7.9.2009 (Core) with latest update.
First of all i installed latest version of OpenSSL there.
Here is the commands for that installation :

cd ~
wget https://www.openssl.org/source/openssl-3.0.7.tar.gz
tar -zxvf openssl-3.0.7.tar.gz
yum install -y perl-IPC-Cmd
cd openssl-3.0.7
./Configure
make
make install
ln -s /usr/local/lib64/libssl.so.3 /usr/lib64/libssl.so.3
ln -s /usr/local/lib64/libcrypto.so.3 /usr/lib64/libcrypto.so.3
sudo ldconfig
reboot
openssl version -d
OPENSSLDIR: "/usr/local/ssl"

Now i installed latest version of stunnel with these commands :

wget ftp://ftp.stunnel.org/stunnel/archive/5.x/stunnel-5.67.tar.gz
sudo yum -y install tar
sudo yum -y update tar
tar -xvzf stunnel-5.67.tar.gz
cd stunnel-5.67
rm -rf stunnel-5.67 > This Is For Learn
groupadd -g 51 stunnel &&
useradd -c "stunnel Daemon" -d /var/lib/stunnel \
        -g stunnel -s /bin/false -u 51 stunnel

./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --disable-systemd --with-ssl=/usr/local

make

make docdir=/usr/share/doc/stunnel-5.67 install

With these commands i changed ssl version of stunnel to the current OpenSSL version, means v3.0.7.

I created a simple cert with make cert command.(stunnel.pem)

Here is stunnel configuration file :

[Server]
client = no
accept  = 11523
connect = 127.0.0.1:11869
cert = stunnel.pem

Here is fips situation :

sysctl crypto.fips_enabled

--Result--

crypto.fips_enabled = 0

Now after running stunnel i got this error :

[ ] Initializing inetd mode configuration
[ ] Clients allowed=500
[.] stunnel 5.67 on x86_64-pc-linux-gnu platform
[.] Compiled/running with OpenSSL 3.0.7 1 Nov 2022
[.] Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,OCSP,PSK,SNI
[ ] errno: (*__errno_location ())
[ ] Initializing inetd mode configuration
[.] Reading configuration from file /etc/stunnel/stunnel.conf
[.] UTF-8 byte order mark not detected
[.] FIPS mode disabled
[ ] Compression disabled
[ ] No PRNG seeding was required
[ ] Initializing service [Server]
[ ] stunnel default security level set: 2
[ ] Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK
[ ] TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256
[ ] TLS options: 0x2100000 (+0x0, -0x0)
[ ] Session resumption enabled
[ ] Loading certificate from file: stunnel.pem
[!] error queue: ssl/ssl_rsa.c:448: error:0A080002:SSL routines::system lib
[!] error queue: crypto/bio/bss_file.c:300: error:10080002:BIO routines::system lib
[!] SSL_CTX_use_certificate_chain_file: crypto/bio/bss_file.c:297: error:80000002:system library::No such file or directory
[!] Service [certificate-based Server]: Failed to initialize TLS context
[!] Configuration failed
[ ] Deallocating temporary section defaults
[ ] Deallocating section [Server]

How can i fix that error?

Score:1
se flag

Stunnel Server On CentOS 7 - TLS options: 0x2100000 (+0x0, -0x0) Error

This is not an error but just the debug information which TLS options are set

How can i fix that error?

The real error you have is this:

[ ] Loading certificate from file: stunnel.pem
[!] error queue: ssl/ssl_rsa.c:448: error:0A080002:SSL routines::system lib
[!] error queue: crypto/bio/bss_file.c:300: error:10080002:BIO routines::system lib
[!] SSL_CTX_use_certificate_chain_file: crypto/bio/bss_file.c:297: error:80000002:system library::No such file or directory

This means the path to the certificate points to a certificate which does not exist or is not accessible by stunnel.

 cert = stunnel.pem

You give only a relative path here. Use an absolute path (i.e. something like /etc/stunnel/stunnel.pem) so that it does not depend on the current working directory for stunnel. Also make sure that permissions allow access.

Score:0
in flag

Make sure config or variables should pointing to correct location and must have correct path with correct file name.

cert = <yourpem>.pem
key = <yourkey>.key

Any OPENSSL environment variables should also point to correct file and location.

I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.