: Older Windows applications might use it as a generic name for "legacy" support components.
: Modern tools like vcpkg often install legacy.dll inside a specific ossl-modules subdirectory. If this path isn't explicitly set in the system environment (via OPENSSL_MODULES ), the main application may fail to find it. legacy.dll
: Use the command openssl version -a to find the default MODULESDIR where OpenSSL looks for its providers. : Older Windows applications might use it as