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CMake/Modules/FindOpenSSL.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices 
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindOpenSSL
# -----------
#
# Find the OpenSSL encryption library.
#
# Imported Targets
# ^^^^^^^^^^^^^^^^
#
# This module defines the following :prop_tgt:`IMPORTED` targets:
#
# ``OpenSSL::SSL``
# The OpenSSL ``ssl`` library, if found.
# ``OpenSSL::Crypto``
# The OpenSSL ``crypto`` library, if found.
#
# Result Variables
# ^^^^^^^^^^^^^^^^
#
# This module will set the following variables in your project:
#
# ``OPENSSL_FOUND``
# System has the OpenSSL library.
# ``OPENSSL_INCLUDE_DIR``
# The OpenSSL include directory.
# ``OPENSSL_CRYPTO_LIBRARY``
# The OpenSSL crypto library.
# ``OPENSSL_SSL_LIBRARY``
# The OpenSSL SSL library.
# ``OPENSSL_LIBRARIES``
# All OpenSSL libraries.
# ``OPENSSL_VERSION``
# This is set to ``$major.$minor.$revision$patch`` (e.g. ``0.9.8s``).
#
# Hints
# ^^^^^
#
# Set ``OPENSSL_ROOT_DIR`` to the root directory of an OpenSSL installation.
# Set ``OPENSSL_USE_STATIC_LIBS`` to ``TRUE`` to look for static libraries.
# Set ``OPENSSL_MSVC_STATIC_RT`` set ``TRUE`` to choose the MT version of the lib.
if (UNIX)
find_package(PkgConfig QUIET)
pkg_check_modules(_OPENSSL QUIET openssl)
endif ()
# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
if(OPENSSL_USE_STATIC_LIBS)
set(_openssl_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
if(WIN32)
set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
else()
set(CMAKE_FIND_LIBRARY_SUFFIXES .a )
endif()
endif()
if (WIN32)
# http://www.slproweb.com/products/Win32OpenSSL.html
set(_OPENSSL_ROOT_HINTS
${OPENSSL_ROOT_DIR}
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (64-bit)_is1;Inno Setup: App Path]"
ENV OPENSSL_ROOT_DIR
)
file(TO_CMAKE_PATH "$ENV{PROGRAMFILES}" _programfiles)
set(_OPENSSL_ROOT_PATHS
"${_programfiles}/OpenSSL"
"${_programfiles}/OpenSSL-Win32"
"${_programfiles}/OpenSSL-Win64"
"C:/OpenSSL/"
"C:/OpenSSL-Win32/"
"C:/OpenSSL-Win64/"
)
unset(_programfiles)
else ()
set(_OPENSSL_ROOT_HINTS
${OPENSSL_ROOT_DIR}
ENV OPENSSL_ROOT_DIR
)
endif ()
set(_OPENSSL_ROOT_HINTS_AND_PATHS
HINTS ${_OPENSSL_ROOT_HINTS}
PATHS ${_OPENSSL_ROOT_PATHS}
)
find_path(OPENSSL_INCLUDE_DIR
NAMES
openssl/ssl.h
${_OPENSSL_ROOT_HINTS_AND_PATHS}
HINTS
${_OPENSSL_INCLUDEDIR}
PATH_SUFFIXES
include
)
if(WIN32 AND NOT CYGWIN)
if(MSVC)
# /MD and /MDd are the standard values - if someone wants to use
# others, the libnames have to change here too
# use also ssl and ssleay32 in debug as fallback for openssl < 0.9.8b
# enable OPENSSL_MSVC_STATIC_RT to get the libs build /MT (Multithreaded no-DLL)
# In Visual C++ naming convention each of these four kinds of Windows libraries has it's standard suffix:
# * MD for dynamic-release
# * MDd for dynamic-debug
# * MT for static-release
# * MTd for static-debug
# Implementation details:
# We are using the libraries located in the VC subdir instead of the parent directory eventhough :
# libeay32MD.lib is identical to ../libeay32.lib, and
# ssleay32MD.lib is identical to ../ssleay32.lib
# enable OPENSSL_USE_STATIC_LIBS to use the static libs located in lib/VC/static
if (OPENSSL_MSVC_STATIC_RT)
set(_OPENSSL_MSVC_RT_MODE "MT")
else ()
set(_OPENSSL_MSVC_RT_MODE "MD")
endif ()
# Since OpenSSL 1.1, lib names are like libcrypto32MTd.lib and libssl32MTd.lib
if( "${CMAKE_SIZEOF_VOID_P}" STREQUAL "8" )
set(_OPENSSL_MSVC_ARCH_SUFFIX "64")
else()
set(_OPENSSL_MSVC_ARCH_SUFFIX "32")
endif()
if(OPENSSL_USE_STATIC_LIBS)
set(_OPENSSL_PATH_SUFFIXES
"lib/VC/static"
"VC/static"
"lib"
)
else()
set(_OPENSSL_PATH_SUFFIXES
"lib/VC"
"VC"
"lib"
)
endif ()
find_library(LIB_EAY_DEBUG
NAMES
libcrypto${_OPENSSL_MSVC_ARCH_SUFFIX}${_OPENSSL_MSVC_RT_MODE}d
libcryptod
libeay32${_OPENSSL_MSVC_RT_MODE}d
libeay32d
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
${_OPENSSL_PATH_SUFFIXES}
)
find_library(LIB_EAY_RELEASE
NAMES
libcrypto${_OPENSSL_MSVC_ARCH_SUFFIX}${_OPENSSL_MSVC_RT_MODE}
libcrypto
libeay32${_OPENSSL_MSVC_RT_MODE}
libeay32
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
${_OPENSSL_PATH_SUFFIXES}
)
find_library(SSL_EAY_DEBUG
NAMES
libssl${_OPENSSL_MSVC_ARCH_SUFFIX}${_OPENSSL_MSVC_RT_MODE}d
libssld
ssleay32${_OPENSSL_MSVC_RT_MODE}d
ssleay32d
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
${_OPENSSL_PATH_SUFFIXES}
)
find_library(SSL_EAY_RELEASE
NAMES
libssl${_OPENSSL_MSVC_ARCH_SUFFIX}${_OPENSSL_MSVC_RT_MODE}
libssl
ssleay32${_OPENSSL_MSVC_RT_MODE}
ssleay32
ssl
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
${_OPENSSL_PATH_SUFFIXES}
)
set(LIB_EAY_LIBRARY_DEBUG "${LIB_EAY_DEBUG}")
set(LIB_EAY_LIBRARY_RELEASE "${LIB_EAY_RELEASE}")
set(SSL_EAY_LIBRARY_DEBUG "${SSL_EAY_DEBUG}")
set(SSL_EAY_LIBRARY_RELEASE "${SSL_EAY_RELEASE}")
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
select_library_configurations(LIB_EAY)
select_library_configurations(SSL_EAY)
mark_as_advanced(LIB_EAY_LIBRARY_DEBUG LIB_EAY_LIBRARY_RELEASE
SSL_EAY_LIBRARY_DEBUG SSL_EAY_LIBRARY_RELEASE)
set(OPENSSL_SSL_LIBRARY ${SSL_EAY_LIBRARY} )
set(OPENSSL_CRYPTO_LIBRARY ${LIB_EAY_LIBRARY} )
set(OPENSSL_LIBRARIES ${SSL_EAY_LIBRARY} ${LIB_EAY_LIBRARY} )
elseif(MINGW)
# same player, for MinGW
set(LIB_EAY_NAMES crypto libeay32)
set(SSL_EAY_NAMES ssl ssleay32)
find_library(LIB_EAY
NAMES
${LIB_EAY_NAMES}
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
"lib/MinGW"
"lib"
)
find_library(SSL_EAY
NAMES
${SSL_EAY_NAMES}
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
PATH_SUFFIXES
"lib/MinGW"
"lib"
)
mark_as_advanced(SSL_EAY LIB_EAY)
set(OPENSSL_SSL_LIBRARY ${SSL_EAY} )
set(OPENSSL_CRYPTO_LIBRARY ${LIB_EAY} )
set(OPENSSL_LIBRARIES ${SSL_EAY} ${LIB_EAY} )
unset(LIB_EAY_NAMES)
unset(SSL_EAY_NAMES)
else()
# Not sure what to pick for -say- intel, let's use the toplevel ones and hope someone report issues:
find_library(LIB_EAY
NAMES
libcrypto
libeay32
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
HINTS
${_OPENSSL_LIBDIR}
PATH_SUFFIXES
lib
)
find_library(SSL_EAY
NAMES
libssl
ssleay32
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
HINTS
${_OPENSSL_LIBDIR}
PATH_SUFFIXES
lib
)
mark_as_advanced(SSL_EAY LIB_EAY)
set(OPENSSL_SSL_LIBRARY ${SSL_EAY} )
set(OPENSSL_CRYPTO_LIBRARY ${LIB_EAY} )
set(OPENSSL_LIBRARIES ${SSL_EAY} ${LIB_EAY} )
endif()
else()
find_library(OPENSSL_SSL_LIBRARY
NAMES
ssl
ssleay32
ssleay32MD
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
HINTS
${_OPENSSL_LIBDIR}
PATH_SUFFIXES
lib
)
find_library(OPENSSL_CRYPTO_LIBRARY
NAMES
crypto
NAMES_PER_DIR
${_OPENSSL_ROOT_HINTS_AND_PATHS}
HINTS
${_OPENSSL_LIBDIR}
PATH_SUFFIXES
lib
)
mark_as_advanced(OPENSSL_CRYPTO_LIBRARY OPENSSL_SSL_LIBRARY)
# compat defines
set(OPENSSL_SSL_LIBRARIES ${OPENSSL_SSL_LIBRARY})
set(OPENSSL_CRYPTO_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
set(OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
endif()
function(from_hex HEX DEC)
string(TOUPPER "${HEX}" HEX)
set(_res 0)
string(LENGTH "${HEX}" _strlen)
while (_strlen GREATER 0)
math(EXPR _res "${_res} * 16")
string(SUBSTRING "${HEX}" 0 1 NIBBLE)
string(SUBSTRING "${HEX}" 1 -1 HEX)
if (NIBBLE STREQUAL "A")
math(EXPR _res "${_res} + 10")
elseif (NIBBLE STREQUAL "B")
math(EXPR _res "${_res} + 11")
elseif (NIBBLE STREQUAL "C")
math(EXPR _res "${_res} + 12")
elseif (NIBBLE STREQUAL "D")
math(EXPR _res "${_res} + 13")
elseif (NIBBLE STREQUAL "E")
math(EXPR _res "${_res} + 14")
elseif (NIBBLE STREQUAL "F")
math(EXPR _res "${_res} + 15")
else()
math(EXPR _res "${_res} + ${NIBBLE}")
endif()
string(LENGTH "${HEX}" _strlen)
endwhile()
set(${DEC} ${_res} PARENT_SCOPE)
endfunction()
if(OPENSSL_INCLUDE_DIR AND EXISTS "${OPENSSL_INCLUDE_DIR}/openssl/opensslv.h")
file(STRINGS "${OPENSSL_INCLUDE_DIR}/openssl/opensslv.h" openssl_version_str
REGEX "^#[\t ]*define[\t ]+OPENSSL_VERSION_NUMBER[\t ]+0x([0-9a-fA-F])+.*")
if(openssl_version_str)
# The version number is encoded as 0xMNNFFPPS: major minor fix patch status
# The status gives if this is a developer or prerelease and is ignored here.
# Major, minor, and fix directly translate into the version numbers shown in
# the string. The patch field translates to the single character suffix that
# indicates the bug fix state, which 00 -> nothing, 01 -> a, 02 -> b and so
# on.
string(REGEX REPLACE "^.*OPENSSL_VERSION_NUMBER[\t ]+0x([0-9a-fA-F])([0-9a-fA-F][0-9a-fA-F])([0-9a-fA-F][0-9a-fA-F])([0-9a-fA-F][0-9a-fA-F])([0-9a-fA-F]).*$"
"\\1;\\2;\\3;\\4;\\5" OPENSSL_VERSION_LIST "${openssl_version_str}")
list(GET OPENSSL_VERSION_LIST 0 OPENSSL_VERSION_MAJOR)
list(GET OPENSSL_VERSION_LIST 1 OPENSSL_VERSION_MINOR)
from_hex("${OPENSSL_VERSION_MINOR}" OPENSSL_VERSION_MINOR)
list(GET OPENSSL_VERSION_LIST 2 OPENSSL_VERSION_FIX)
from_hex("${OPENSSL_VERSION_FIX}" OPENSSL_VERSION_FIX)
list(GET OPENSSL_VERSION_LIST 3 OPENSSL_VERSION_PATCH)
if (NOT OPENSSL_VERSION_PATCH STREQUAL "00")
from_hex("${OPENSSL_VERSION_PATCH}" _tmp)
# 96 is the ASCII code of 'a' minus 1
math(EXPR OPENSSL_VERSION_PATCH_ASCII "${_tmp} + 96")
unset(_tmp)
# Once anyone knows how OpenSSL would call the patch versions beyond 'z'
# this should be updated to handle that, too. This has not happened yet
# so it is simply ignored here for now.
string(ASCII "${OPENSSL_VERSION_PATCH_ASCII}" OPENSSL_VERSION_PATCH_STRING)
endif ()
set(OPENSSL_VERSION "${OPENSSL_VERSION_MAJOR}.${OPENSSL_VERSION_MINOR}.${OPENSSL_VERSION_FIX}${OPENSSL_VERSION_PATCH_STRING}")
endif ()
endif ()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
if (OPENSSL_VERSION)
find_package_handle_standard_args(OpenSSL
REQUIRED_VARS
OPENSSL_LIBRARIES
OPENSSL_INCLUDE_DIR
VERSION_VAR
OPENSSL_VERSION
FAIL_MESSAGE
"Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR"
)
else ()
find_package_handle_standard_args(OpenSSL "Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR"
OPENSSL_LIBRARIES
OPENSSL_INCLUDE_DIR
)
endif ()
mark_as_advanced(OPENSSL_INCLUDE_DIR OPENSSL_LIBRARIES)
if(OPENSSL_FOUND)
if(NOT TARGET OpenSSL::Crypto AND
(EXISTS "${OPENSSL_CRYPTO_LIBRARY}" OR
EXISTS "${LIB_EAY_LIBRARY_DEBUG}" OR
EXISTS "${LIB_EAY_LIBRARY_RELEASE}")
)
add_library(OpenSSL::Crypto UNKNOWN IMPORTED)
set_target_properties(OpenSSL::Crypto PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}")
if(EXISTS "${OPENSSL_CRYPTO_LIBRARY}")
set_target_properties(OpenSSL::Crypto PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION "${OPENSSL_CRYPTO_LIBRARY}")
endif()
if(EXISTS "${LIB_EAY_LIBRARY_RELEASE}")
set_property(TARGET OpenSSL::Crypto APPEND PROPERTY
IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(OpenSSL::Crypto PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
IMPORTED_LOCATION_RELEASE "${LIB_EAY_LIBRARY_RELEASE}")
endif()
if(EXISTS "${LIB_EAY_LIBRARY_DEBUG}")
set_property(TARGET OpenSSL::Crypto APPEND PROPERTY
IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(OpenSSL::Crypto PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
IMPORTED_LOCATION_DEBUG "${LIB_EAY_LIBRARY_DEBUG}")
endif()
endif()
if(NOT TARGET OpenSSL::SSL AND
(EXISTS "${OPENSSL_SSL_LIBRARY}" OR
EXISTS "${SSL_EAY_LIBRARY_DEBUG}" OR
EXISTS "${SSL_EAY_LIBRARY_RELEASE}")
)
add_library(OpenSSL::SSL UNKNOWN IMPORTED)
set_target_properties(OpenSSL::SSL PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}")
if(EXISTS "${OPENSSL_SSL_LIBRARY}")
set_target_properties(OpenSSL::SSL PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION "${OPENSSL_SSL_LIBRARY}")
endif()
if(EXISTS "${SSL_EAY_LIBRARY_RELEASE}")
set_property(TARGET OpenSSL::SSL APPEND PROPERTY
IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(OpenSSL::SSL PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
IMPORTED_LOCATION_RELEASE "${SSL_EAY_LIBRARY_RELEASE}")
endif()
if(EXISTS "${SSL_EAY_LIBRARY_DEBUG}")
set_property(TARGET OpenSSL::SSL APPEND PROPERTY
IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(OpenSSL::SSL PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
IMPORTED_LOCATION_DEBUG "${SSL_EAY_LIBRARY_DEBUG}")
endif()
if(TARGET OpenSSL::Crypto)
set_target_properties(OpenSSL::SSL PROPERTIES
INTERFACE_LINK_LIBRARIES OpenSSL::Crypto)
endif()
endif()
endif()
# Restore the original find library ordering
if(OPENSSL_USE_STATIC_LIBS)
set(CMAKE_FIND_LIBRARY_SUFFIXES ${_openssl_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
endif()
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