xiwen5566 / xw_openssl

TLS/SSL and crypto library

My openssl library for leanring.

The xcode index setup.

• Make project xw_openssl
• Set the xcode project "C Hearder Search Path" and "C Lib Search Path", absolute path to this project's include folder the for the crypto include folder.

Installatio on Mac and setup for personal project

brew install --force openssl
Warning: openssl: this formula has no --force option so it will be ignored!
==> Downloading https://homebrew.bintray.com/bottles/openssl-1.0.2k.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring openssl-1.0.2k.sierra.bottle.tar.gz
==> Using the sandbox
==> Caveats
A CA file has been bootstrapped using certificates from the SystemRoots
keychain. To add additional certificates (e.g. the certificates added in
the System keychain), place .pem files in
  /usr/local/etc/openssl/certs

and run
  /usr/local/opt/openssl/bin/c_rehash

This formula is keg-only, which means it was not symlinked into /usr/local.

Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries

If you need to have this software first in your PATH run:
  echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.zshrc

For compilers to find this software you may need to set:
    LDFLAGS:  -L/usr/local/opt/openssl/lib
    CPPFLAGS: -I/usr/local/opt/openssl/include
For pkg-config to find this software you may need to set:
    PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig

==> Summary
🍺  /usr/local/Cellar/openssl/1.0.2k: 1,696 files, 12M

Secure programming with the OpenSSL API

• Create basic secure and unsecure connections
• From https://www.ibm.com/developerworks/library/l-openssl/
• In Folder xw_test/intro-openssl/

.
└── intro-openssl
    ├── README
    ├── TrustStore.pem
    ├── nossl.c
    └── withssl.c

This is the right command to include the lib.

 ✘ guanghe@GUANGHE-M-H03T  ~/Documents/STUDY/Projects_personal/xw_openssl/xw_test/intro-openssl   master ●✚  gcc -g -O2 -Wall -Wextra -I/usr/local/opt/openssl/include -rdynamic -L/usr/local/opt/openssl/lib -lcrypto nossl.c -o nossl                              
Undefined symbols for architecture x86_64:
  "_SSL_load_error_strings", referenced from:
      _main in nossl-668935.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

gcc -Wall -Wextra -Werror -o nossl -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib -lssl -lcrypto nossl.c