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I'm trying to compile a program that, according to the documentation, requires the "OpenSSL library". I have OpenSSL installed, and it's still giving me the error openssl/sha.h: No such file or directory. Is there some other library that has to be installed?

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probably you are missing the openssl header files. depending on your distribution this package might have a different name, mostly it's something like openssl-dev or openssl-devel. after you installed the openssl header files, the compiler should be able to find openssl/sha.h.

In Ubuntu/Debian the package is called libssl-dev.

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  • Turns out it was "libcurl4-openssl-dev". Not sure what libcurl has do do with SSL or SHA256, but it worked.
    – tkbx
    Aug 20, 2013 at 16:23
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    @tkbx /usr/include/openssl/sha.h is in libssl-dev in oldstable, stable and unstable.
    – Gilles 'SO- stop being evil'
    Aug 20, 2013 at 22:43
  • FYI: I already had libcurl4-openssl-dev installed. libssl-dev sorted this for me.
    – voices
    Jan 10, 2019 at 13:41

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