+#
+# CA handling
+#
+set(CURL_CA_BUNDLE "auto" CACHE STRING
+ "Path to the CA bundle. Set 'none' to disable or 'auto' for auto-detection. Defaults to 'auto'.")
+set(CURL_CA_FALLBACK OFF CACHE BOOL
+ "Set ON to use built-in CA store of TLS backend. Defaults to OFF")
+set(CURL_CA_PATH "auto" CACHE STRING
+ "Location of default CA path. Set 'none' to disable or 'auto' for auto-detection. Defaults to 'auto'.")
+
+if("${CURL_CA_BUNDLE}" STREQUAL "")
+ message(FATAL_ERROR "Invalid value of CURL_CA_BUNDLE. Use 'none', 'auto' or file path.")
+elseif("${CURL_CA_BUNDLE}" STREQUAL "none")
+ unset(CURL_CA_BUNDLE CACHE)
+elseif("${CURL_CA_BUNDLE}" STREQUAL "auto")
+ unset(CURL_CA_BUNDLE CACHE)
+ set(CURL_CA_BUNDLE_AUTODETECT TRUE)
+else()
+ set(CURL_CA_BUNDLE_SET TRUE)
+endif()
+
+if("${CURL_CA_PATH}" STREQUAL "")
+ message(FATAL_ERROR "Invalid value of CURL_CA_PATH. Use 'none', 'auto' or directory path.")
+elseif("${CURL_CA_PATH}" STREQUAL "none")
+ unset(CURL_CA_PATH CACHE)
+elseif("${CURL_CA_PATH}" STREQUAL "auto")
+ unset(CURL_CA_PATH CACHE)
+ set(CURL_CA_PATH_AUTODETECT TRUE)
+else()
+ set(CURL_CA_PATH_SET TRUE)
+endif()
+
+if(CURL_CA_BUNDLE_SET AND CURL_CA_PATH_AUTODETECT)
+ # Skip autodetection of unset CA path because CA bundle is set explicitly
+elseif(CURL_CA_PATH_SET AND CURL_CA_BUNDLE_AUTODETECT)
+ # Skip autodetection of unset CA bundle because CA path is set explicitly
+elseif(CURL_CA_PATH_AUTODETECT OR CURL_CA_BUNDLE_AUTODETECT)
+ # first try autodetecting a CA bundle, then a CA path
+
+ if(CURL_CA_BUNDLE_AUTODETECT)
+ set(SEARCH_CA_BUNDLE_PATHS
+ /etc/ssl/certs/ca-certificates.crt
+ /etc/pki/tls/certs/ca-bundle.crt
+ /usr/share/ssl/certs/ca-bundle.crt
+ /usr/local/share/certs/ca-root-nss.crt
+ /etc/ssl/cert.pem)
+
+ foreach(SEARCH_CA_BUNDLE_PATH ${SEARCH_CA_BUNDLE_PATHS})
+ if(EXISTS "${SEARCH_CA_BUNDLE_PATH}")
+ message(STATUS "Found CA bundle: ${SEARCH_CA_BUNDLE_PATH}")
+ set(CURL_CA_BUNDLE "${SEARCH_CA_BUNDLE_PATH}")
+ set(CURL_CA_BUNDLE_SET TRUE CACHE BOOL "Path to the CA bundle has been set")
+ break()
+ endif()
+ endforeach()
+ endif()
+
+ if(CURL_CA_PATH_AUTODETECT AND (NOT CURL_CA_PATH_SET))
+ if(EXISTS "/etc/ssl/certs")
+ set(CURL_CA_PATH "/etc/ssl/certs")
+ set(CURL_CA_PATH_SET TRUE CACHE BOOL "Path to the CA bundle has been set")
+ endif()
+ endif()
+endif()
+
+if(CURL_CA_PATH_SET AND NOT USE_OPENSSL AND NOT USE_MBEDTLS)
+ message(FATAL_ERROR
+ "CA path only supported by OpenSSL, GnuTLS or mbed TLS. "
+ "Set CURL_CA_PATH=none or enable one of those TLS backends.")
+endif()
+
+