Libcurl no support for https but curl does - c++

When I run curl -V my output is this
curl 7.82.0-DEV (x86_64-pc-win32) libcurl/7.82.0-DEV OpenSSL/1.1.1m WinIDN
Release-Date: [unreleased]
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS HSTS HTTPS-proxy IDN IPv6 Kerberos Largefile NTLM SPNEGO SSL SSPI UnixSockets alt-svc
Https is clearly there. When I use it through c++, by using curl_version_info_data
curl_version_info_data* ver = curl_version_info(CURLVERSION_NOW);
for (int i = 0; i < 14; ++i) {
cout << ver->protocols[i] << endl;
}
The supported protocols listed are
dict
file
ftp
gopher
http
imap
ldap
mqtt
pop3
rtsp
smb
smtp
telnet
tftp
If I try using https, I get the error Unsupported protocol. Anyone get any ideas?


I figured it out, when running I tried fixing by grabbing libcurl.lib and libcurl_imp.lib from a precompiled version of Curl (I had two versions installed). The precompiled version did not have support for https. I read the FAQ here https://curl.se/docs/faq.html and properly linked the static library. Afterwards, it worked fine.

Related

libcurl HTTPS enabled but not usable

For our project we build libcurl from scratch over cmake. The libcurl-configure-out.log tells me it enabled HTTPS (among others), heres the important part about that:
-- Enabled features: SSL IPv6 unixsockets AsynchDNS Largefile alt-svc HSTS NTLM HTTPS-proxy
-- Enabled protocols: DICT FILE FTP FTPS GOPHER GOPHERS HTTP HTTPS IMAP IMAPS LDAP MQTT POP3 POP3S RTSP SCP SFTP SMB SMBS SMTP SMTPS TELNET TFTP
-- Enabled SSL backends: OpenSSL
But when I try to set a TLS version in our code, it says "CURLE_NOT_BUILT_IN"
const CURLcode state = curl_easy_setopt(this->m_curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
// state == 4 aka "CURLE_NOT_BUILT_IN"
I also tried to verify over the curl executable, which kinda gives me the same impression
C:<snip>\build\ex_libcurl-prefix\src\ex_libcurl-build\src\Debug>curl.exe --version
curl 7.80.0 (Windows) libcurl/7.80.0 libssh2/1.10.0
Release-Date: 2021-12-10
Protocols: dict file ftp gopher http imap ldap mqtt pop3 rtsp scp sftp smb smtp telnet tftp
Features: AsynchDNS HSTS IPv6 Largefile NTLM UnixSockets alt-svc
Where did I go wrong?
Edit: Some more parts about SSL beeing enabled:
-- Found OpenSSL: optimized;C:/Program Files/OpenSSL-Win64/lib/VC/libcrypto64MD.lib;debug;C:/Program Files/OpenSSL-Win64/lib/VC/libcrypto64MDd.lib (found version "3.0.0")
-- Looking for openssl/crypto.h
-- Looking for openssl/crypto.h - found
-- Looking for cldap_open in wldap32;winmm;ws2_32;OpenSSL::SSL;OpenSSL::Crypto
-- Looking for cldap_open in wldap32;winmm;ws2_32;OpenSSL::SSL;OpenSSL::Crypto - found

Protocol https not supported or disabled in libcurl in Redhat Linux 8

I have an C++ application which is using curl 7.61.1 version.
while trying to connect to device using ssl I get this error:
"Protocol https not supported or disabled in libcurl"
although the default curl version installed in RHEL8 supports https
curl --version
curl 7.61.1 (x86_64-redhat-linux-gnu) libcurl/7.61.1 OpenSSL/1.1.1 zlib/1.2.11 brotli/1.0.6 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) libssh/0.8.3/openssl/zlib nghttp2/1.33.0
Release-Date: 2018-09-05
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz brotli TLS-SRP HTTP2 UnixSockets HTTPS-proxy PSL Metalink
please suggest how to configure/use curl with ssl in Redhat Linux 8

libCurl gives unsupported protocol on a script running as cron job

Here is my situation: I have an sh script that writes some data to text files then calls a pre-built c++ binary that processes these text files and uses libCurl to send an email. Under the user that created the script and the binary everything is working fine, the email is delivered perfectly. Something goes wrong when executing the script under the cron daemon. Permissions-wise, the script and binary have 777 and the text files have 666. I have created another user and tried executing the binary it gave me the following error:
* Protocol smtp not supported or disabled in libcurl
* Unsupported protocol
curl_easy_perform() failed: Unsupported protocol
After the cron period passed the shell gave a message something like You have a new mail in/var/spool/mail/$USER, that file contains the same message.
Executing curl -V on both users:
curl 7.48.0 (i686-pc-linux-gnu) libcurl/7.48.0 OpenSSL/1.0.0 zlib/1.2.3 libidn/1.18
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: IDN IPv6 Largefile NTLM NTLM_WB SSL libz UnixSockets
Any help is really appreciated.

Sending Email With libcurl fails Over Exchange Server

I am attempting to send a simple email message using libcurl in C++ over a MS Exchange server. The program seems to connect with the server, authenticate correctly, but fails with error 500 - unknown command when attempting to send the package.
I have verified the server address, that libcurl was compiled with SSL support, NTLM is supported authentication type, and all the email addresses are valid.
Checking the CURL version returns:
curl 7.37.1 (armv5tejl-unknown-linux-gnueabi) libcurl/7.37.1 OpenSSL/0.9.8o zlib/1.2.3.4
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp smtp smtps telnet tftp
Features: IPv6 Largefile NTLM NTLM_WB SSL libz
And the program reports the following:
* Rebuilt URL to: mail.domain.net:587/
* Hostname was NOT found in DNS cache
* Trying 192.168.0.114...
* Connected to mail.domain.net (192.168.0.114) port 587 (#0)
* Server auth using NTLM with user 'redmine'
> PUT / HTTP/1.1
Authorization: NTLM TlRMTVNTUAABAAAABoIIAAAAAAAAAAAAAAAAAAAAAAA=
Host: mail.iem.net:587
Accept: */*
Content-Length: 0
220 mail.domain.net Microsoft ESMTP MAIL Service ready at Fri, 22 Aug 2014 15:20:09 -0400
500 5.3.3 Unrecognized command
500 5.3.3 Unrecognized command
500 5.3.3 Unrecognized command
500 5.3.3 Unrecognized command
500 5.3.3 Unrecognized command
421 4.7.0 Too many errors on this connection, closing transmission channel
* Connection #0 to host mail.iem.net left intact
I'm using the following connection settings in the program:
curl_easy_setopt(this->curl,CURLOPT_URL, this->address.c_str());
curl_easy_setopt(this->curl,CURLOPT_USERNAME,this->username.c_str());
curl_easy_setopt(this->curl,CURLOPT_PASSWORD,this->username.c_str());
curl_easy_setopt(this->curl,CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_easy_setopt(this->curl,CURLOPT_HTTPAUTH, CURLAUTH_NTLM);
curl_easy_setopt(this->curl,CURLOPT_USE_SSL, CURLUSESSL_ALL);
curl_easy_setopt(this->curl,CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(this->curl,CURLOPT_SSL_VERIFYHOST, 0L);
curl_easy_setopt(this->curl,CURLOPT_UPLOAD, 1L);
curl_easy_setopt(this->curl, CURLOPT_VERBOSE, 1L);
Any suggestions would be greatly appreciated!

Is there any way to use POP3 for recving mail over localhost wamp?

I am trying to check receive mail script on local server but can't connect to localhost on wamp. Is there any POP3 extension for wamp ?