Add support for EPA

[paraddise]

#679
Implement for NTLM:

• OpenSSL
• GnuTLS
• tests

Implement for Kerberos:

• OpenSSL
• GnuTLS

Implement for SSPI

• OpenSSL
• GnuTLS

Analyze the changes needed for TDS 8.0

[paraddise]

@mmcnabb-vms Can you look at this? Will this be merged at all or am I trying in vain?
If Yes, write please the plan what I need to add else to this PR. tests? implementation for other ssl library?

[freddy77]

Yes, surely a good feature to have. There's no rush I think, I saw the PR but the initial state was a bit messy so I waited.
It would be nice to have support for GnuTLS and SSPI too and a test but note I think is strictly necessary. But surely I would be nice to have at least a manual test.

[mmcnabb-vms]

@mmcnabb-vms Can you look at this?

freddy is the maintainer, I'm just a random contributor :) working on other issues at the moment

[paraddise]

@freddy77 Can you help me build freetds for windows? I've never done it before and I could not build it with Visual Studio Code 2022. Maybe there is a documentation how to configure viausl studio code 2022?
I'm getting error like in ci in AppVeyor

[ 10%] Built target tdsutils
[ 10%] Building C object src/utils/unittests/CMakeFiles/tds_test_base.dir/test_base.c.obj
test_base.c
[ 10%] Linking C static library tds_test_base.lib
[ 10%] Built target tds_test_base

NMAKE : fatal error U1073: don't know how to make 'C:\Users\Administrator\source\repos\freetds\src\replacements\iconv_charsets.h'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\bin\HostX86\x86\nmake.exe" -s -f src\replacements\CMakeFiles\iconv_charsets_h.dir\build.make /nologo -SL                 src\replacements\CMakeFiles\iconv_charsets_h.dir\build' : return code '0x2'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\bin\HostX86\x86\nmake.exe" -s -f CMakeFiles\Makefile2 /nologo -LS                 all' : return code '0x2'

Stop.

solved by install perl
But have another error

C:\Users\Administrator\source\repos\freetds\src\tds\tls.c(84): error C2037: left of 'init' specifies undefined struct/union 'bio_st'
C:\Users\Administrator\source\repos\freetds\src\tds\tls.c(90): error C2037: left of 'ptr' specifies undefined struct/union 'bio_st'
C:\Users\Administrator\source\repos\freetds\src\tds\tls.c(94): warning C4028: formal parameter 1 different from declaration
C:\Users\Administrator\source\repos\freetds\src\tds\tls.c(96): error C2037: left of 'ptr' specifies undefined struct/union 'bio_st'
SL                 src\tds\CMakeFiles\tds.dir\build' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\bin\HostX86\x86\nmake.exe" -s -f CMakeFiles\Makefile2 /nologo -S                  all' : return code '0x2'
Stop.

[freddy77]

Good you fixed the Perl issue.
Building from git requires some more settings, from package some files are already generated to reduce dependencies.
One other option would have been to copy these files from a recent package.

About the error from tls.c it looks like BIO_get_data was not detected, it should be available. See include/config.h, try to define HAVE_BIO_GET_DATA.
From Appveyor, for instance, you have something like

-- Found OpenSSL: optimized;C:/OpenSSL-v35-Win64/lib/VC/x64/MD/libcrypto.lib;debug;C:/OpenSSL-v35-Win64/lib/VC/x64/MDd/libcrypto.lib (found version "3.5.4")
-- Looking for BIO_get_data
-- Looking for BIO_get_data - found
-- Looking for RSA_get0_key
-- Looking for RSA_get0_key - found
-- Looking for ASN1_STRING_get0_data
-- Looking for ASN1_STRING_get0_data - found
-- Looking for SSL_set_alpn_protos
-- Looking for SSL_set_alpn_protos - found

[paraddise]

If I build with in Visual Studio Code with the folowing CMakeSettings.json

{
  "configurations": [
    {
      "name": "x64-Debug",
      "generator": "NMake Makefiles",
      "configurationType": "Debug",
      "inheritEnvironments": [ "msvc_x64_x64" ],
      "buildRoot": "${projectDir}\\build\\",
      "installRoot": "${projectDir}\\out\\install\\${name}",
      "cmakeCommandArgs": "",
      "ctestCommandArgs": "",
      "variables": [
        {
          "name": "ENABLE_EXTRA_CHECKS",
          "value": "false",
          "type": "BOOL"
        },
        {
          "name": "GPERF",
          "value": "C:/ProgramData/chocolatey/bin/gperf.exe",
          "type": "FILEPATH"
        },
        {
          "name": "LIB_EAY_DEBUG",
          "value": "C:/Program Files/OpenSSL-Win64/lib/VC/x64/MDd/libcrypto.lib",
          "type": "FILEPATH"
        },
        {
          "name": "LIB_EAY_RELEASE",
          "value": "C:/Program Files/OpenSSL-Win64/lib/VC/x64/MD/libcrypto.lib",
          "type": "FILEPATH"
        },
        {
          "name": "OPENSSL_APPLINK_SOURCE",
          "value": "C:/Program Files/OpenSSL-Win64/include/openssl/applink.c",
          "type": "FILEPATH"
        },
        {
          "name": "SSL_EAY_DEBUG",
          "value": "C:/Program Files/OpenSSL-Win64/lib/VC/x64/MDd/libssl.lib",
          "type": "FILEPATH"
        },
        {
          "name": "SSL_EAY_RELEASE",
          "value": "C:/Program Files/OpenSSL-Win64/lib/VC/x64/MD/libssl.lib",
          "type": "FILEPATH"
        },
        {
          "name": "WITH_OPENSSL",
          "value": "True",
          "type": "BOOL"
        },
        {
          "name": "ENABLE_MSDBLIB",
          "value": "True",
          "type": "BOOL"
        },
        {
          "name": "ENABLE_KRB5",
          "value": "True",
          "type": "BOOL"
        },
        {
          "name": "CMAKE_C_COMPILER",
          "value": "C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.44.35207/bin/Hostx64/x64/cl.exe",
          "type": "FILEPATH"
        },
        {
          "name": "CMAKE_CXX_COMPILER",
          "value": "C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.44.35207/bin/Hostx64/x64/cl.exe",
          "type": "FILEPATH"
        }
      ]
    },
    {
      "name": "x64-Debug-2",
      "generator": "Ninja",
      "configurationType": "Debug",
      "buildRoot": "${projectDir}\\out\\build\\${name}",
      "installRoot": "${projectDir}\\out\\install\\${name}",
      "cmakeCommandArgs": "",
      "buildCommandArgs": "",
      "ctestCommandArgs": "",
      "inheritEnvironments": [ "msvc_x64_x64" ],
      "variables": []
    }
  ]
}

Then it finds BIO_get_data
But after that it could not compile

[ 21%] Linking C executable strings.exe
LINK Pass 1: command "C:\PROGRA~1\MICROS~3\2022\COMMUN~1\VC\Tools\MSVC\1444~1.352\bin\Hostx64\x64\link.exe /nologo @CMakeFiles\r_strings.dir\objects1.rsp /out:strings.exe /implib:strings.lib /pdb:C:\Users\Administrator\source\repos\freetds\build\src\replacements\unittests\strings.pdb /version:0.0 /machine:x64 /debug /INCREMENTAL /subsystem:console ..\..\utils\unittests\tds_test_base.lib ..\replacements.lib ..\..\utils\tdsutils.lib C:\Users\Administrator\source\repos\freetds\iconv\lib\iconv.lib kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\r_strings.dir/intermediate.manifest CMakeFiles\r_strings.dir/manifest.res" failed (exit code 1120) with the following output:
strings.c.obj : error LNK2019: unresolved external symbol __imp_free referenced in function test_main
strings.c.obj : error LNK2019: unresolved external symbol __imp_malloc referenced in function test_main
strings.c.obj : error LNK2019: unresolved external symbol __imp__wassert referenced in function test_main
strings.c.obj : error LNK2019: unresolved external symbol memset referenced in function test_main
strings.c.obj : error LNK2019: unresolved external symbol strcmp referenced in function test_main
strings.c.obj : error LNK2019: unresolved external symbol strcpy referenced in function test_main
strings.c.obj : error LNK2001: unresolved external symbol _RTC_InitBase
replacements.lib(strlcpy.c.obj) : error LNK2001: unresolved external symbol _RTC_InitBase
replacements.lib(strlcat.c.obj) : error LNK2001: unresolved external symbol _RTC_InitBase
strings.c.obj : error LNK2001: unresolved external symbol _RTC_Shutdown
replacements.lib(strlcpy.c.obj) : error LNK2001: unresolved external symbol _RTC_Shutdown
replacements.lib(strlcat.c.obj) : error LNK2001: unresolved external symbol _RTC_Shutdown
LINK : error LNK2001: unresolved external symbol mainCRTStartup
replacements.lib(strlcpy.c.obj) : error LNK2019: unresolved external symbol memcpy referenced in function tds_strlcpy
replacements.lib(strlcat.c.obj) : error LNK2001: unresolved external symbol memcpy
replacements.lib(strlcpy.c.obj) : error LNK2019: unresolved external symbol strlen referenced in function tds_strlcpy
replacements.lib(strlcat.c.obj) : error LNK2001: unresolved external symbol strlen
C:\Users\Administrator\source\repos\freetds\iconv\lib\iconv.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\kernel32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\user32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\gdi32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\winspool.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\shell32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\ole32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\oleaut32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\uuid.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\comdlg32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files (x86)\Windows Kits\10\\lib\10.0.26100.0\\um\x86\advapi32.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\lib\x86\MSVCRTD.lib : warning LNK4272: library machine type 'x86' conflicts with target machine type 'x64'

I don't understand why it uses x86 compiler, I don't know how to specity else if I specified via CMAKE_C_COMPILER

[freddy77]

It looks like your environment is compiling for x64 but trying to link to x86. I would try to use msvc_x64 instead of msvc_x64_x64.

Maybe you launched the wrong environment by mistake (if using command line) ?

Also Windows should use SSPI so ENABLE_KRB5 should be False.

[paraddise]

Thank you. I managed to compile on Windows. I didn't notice the misc/run_with_compiler.cmd for a long time, but after I used it the project was built.
I added support for SSPI.
Tested with python script and pyodbc

import pyodbc
import os

conn = (
    "DRIVER=FreeTDSCustom;"
    "SERVER=127.0.0.1;"
    "Database=msdb;"
    "Port=1433;"
    "Trusted_Connection=yes;"
)

print("localhost version: ", pyodbc.connect(conn).execute("SELECT @@VERSION").fetchone())

[paraddise]

If you have any questions about how to test, how to troubleshoot the connection, or how to configure the SQL Server or enable the EPA, I will be happy to help.
Tested on 2019 and 2022 SQL Servers with the latest updates installed.