openssl: Make it build with MSVC

MSVC needs a way of knowing which symbols are supposed to be exported,
otherwise it does not create a DLL. This means the wrap was previously
unusable as a shared library.

The OpenSSL build process does that by passing a `.def` file to the
linker. This reimplements OpenSSL's `util/mkdef.pl` script to make the
meson build do the same as the normal build process.

Fixes mesonbuild#181.

releases.json

@@ -2338,6 +2338,7 @@
       "openssl"
     ],
     "versions": [
+      "3.0.8-2",
       "3.0.8-1",
       "3.0.7-2",
       "3.0.7-1",

subprojects/packagefiles/openssl/generate_def.py

@@ -0,0 +1,53 @@
+import sys
+
+EXTRA_CRYPTO = """\
+WPACKET_allocate_bytes
+WPACKET_cleanup
+WPACKET_close
+WPACKET_fill_lengths
+WPACKET_finish
+WPACKET_get_curr
+WPACKET_get_length
+WPACKET_get_total_written
+WPACKET_init
+WPACKET_init_static_len
+WPACKET_memcpy
+WPACKET_memset
+WPACKET_put_bytes__
+WPACKET_reserve_bytes
+WPACKET_set_flags
+WPACKET_start_sub_packet
+WPACKET_start_sub_packet_len__
+WPACKET_sub_allocate_bytes__
+WPACKET_sub_memcpy__
+WPACKET_sub_reserve_bytes__
+ssl3_cbc_digest_record
+ssl3_cbc_remove_padding_and_mac
+tls1_cbc_remove_padding_and_mac
+""".splitlines()
+
+def main():
+    import argparse
+    p = argparse.ArgumentParser(description="Convert OpenSSL .num files into .def files")
+    p.add_argument("--fixup-crypto", action="store_true", help="crypto.dll-specific fixups")
+    args = p.parse_args()
+
+    input = sys.stdin.read()
+    lines = [line.split() for line in input.splitlines()]
+    data = [tuple([name, ordinal] + tags.split(":")) for name, ordinal, _, tags in lines]
+
+    print("EXPORTS")
+    for name, ordinal, exists, system, _, tags, *_ in data:
+        if exists != "EXIST":
+            continue
+        if system and not system.startswith("!"):
+            continue
+        if any(tag in "COMP CRYPTO_MDEBUG DGRAM EC_NISTP_64_GCC_128 EGD MD2 RC5 SSL3_METHOD UNIT_TEST".split() for tag in tags.split(",")):
+            continue
+        print("    {} @{}".format(name, ordinal))
+    if args.fixup_crypto:
+        for name in EXTRA_CRYPTO:
+            print("    {}".format(name))
+
+if __name__ == "__main__":
+    sys.exit(main())

subprojects/packagefiles/openssl/generator.sh

@@ -3,6 +3,9 @@ set -e
 
 cd "$(dirname "${BASH_SOURCE[0]}")"
 
+python3 generate_def.py --fixup-crypto < util/libcrypto.num > crypto.def
+python3 generate_def.py < util/libssl.num > ssl.def
+
 # Node.js version should bundle OpenSSL of matching version to one specified in wrap file
 node_version=v19.7.0
 openssl_version="$OPENSSL_VERSION"

subprojects/packagefiles/openssl/meson.build

@@ -341,6 +341,7 @@ libcrypto_lib = library(
   sources: libcrypto_sources,
   include_directories: include_directories,
   c_args: c_args,
+  vs_module_defs: 'crypto.def',
   install: true,
 )
 
@@ -356,6 +357,7 @@ libssl_lib = library(
   sources: libssl_sources,
   include_directories: include_directories,
   c_args: c_args,
+  vs_module_defs: 'ssl.def',
   install: true,
 )
 

tools/sanity_checks.py

@@ -70,6 +70,7 @@
         'bn_conf.h',
         'dso_conf.h',
         'buildinf.h',
+        'generate_def.py',
         'generate_gypi.pl.patch',
         'meson.build.tmpl',
         'README.md',