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* [PATCH] credential/wincred: include wincred.h
@ 2023-03-25  1:23 M Hickford via GitGitGadget
  2023-03-28 12:15 ` Johannes Schindelin
  0 siblings, 1 reply; 3+ messages in thread
From: M Hickford via GitGitGadget @ 2023-03-25  1:23 UTC (permalink / raw)
  To: git
  Cc: Johannes Schindelin, Johannes Sixt, Harshil Jani, M Hickford,
	M Hickford

From: M Hickford <mirth.hickford@gmail.com>

Delete redundant definitions. Mingw-w64 has wincred.h since 2007 [1].

[1] https://github.com/mingw-w64/mingw-w64/blob/9d937a7f4f766f903c9433044f77bfa97a0bc1d8/mingw-w64-headers/include/wincred.h

Signed-off-by: M Hickford <mirth.hickford@gmail.com>
---
    credential/wincred: include wincred.h

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1496%2Fhickford%2Fwincred-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1496/hickford/wincred-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/1496

 .../wincred/git-credential-wincred.c          | 61 +------------------
 1 file changed, 1 insertion(+), 60 deletions(-)

diff --git a/contrib/credential/wincred/git-credential-wincred.c b/contrib/credential/wincred/git-credential-wincred.c
index ead6e267c78..6e5a91a7168 100644
--- a/contrib/credential/wincred/git-credential-wincred.c
+++ b/contrib/credential/wincred/git-credential-wincred.c
@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <io.h>
 #include <fcntl.h>
+#include <wincred.h>
 
 /* common helpers */
 
@@ -33,64 +34,6 @@ static void *xmalloc(size_t size)
 	return ret;
 }
 
-/* MinGW doesn't have wincred.h, so we need to define stuff */
-
-typedef struct _CREDENTIAL_ATTRIBUTEW {
-	LPWSTR Keyword;
-	DWORD  Flags;
-	DWORD  ValueSize;
-	LPBYTE Value;
-} CREDENTIAL_ATTRIBUTEW, *PCREDENTIAL_ATTRIBUTEW;
-
-typedef struct _CREDENTIALW {
-	DWORD                  Flags;
-	DWORD                  Type;
-	LPWSTR                 TargetName;
-	LPWSTR                 Comment;
-	FILETIME               LastWritten;
-	DWORD                  CredentialBlobSize;
-	LPBYTE                 CredentialBlob;
-	DWORD                  Persist;
-	DWORD                  AttributeCount;
-	PCREDENTIAL_ATTRIBUTEW Attributes;
-	LPWSTR                 TargetAlias;
-	LPWSTR                 UserName;
-} CREDENTIALW, *PCREDENTIALW;
-
-#define CRED_TYPE_GENERIC 1
-#define CRED_PERSIST_LOCAL_MACHINE 2
-#define CRED_MAX_ATTRIBUTES 64
-
-typedef BOOL (WINAPI *CredWriteWT)(PCREDENTIALW, DWORD);
-typedef BOOL (WINAPI *CredEnumerateWT)(LPCWSTR, DWORD, DWORD *,
-    PCREDENTIALW **);
-typedef VOID (WINAPI *CredFreeT)(PVOID);
-typedef BOOL (WINAPI *CredDeleteWT)(LPCWSTR, DWORD, DWORD);
-
-static HMODULE advapi;
-static CredWriteWT CredWriteW;
-static CredEnumerateWT CredEnumerateW;
-static CredFreeT CredFree;
-static CredDeleteWT CredDeleteW;
-
-static void load_cred_funcs(void)
-{
-	/* load DLLs */
-	advapi = LoadLibraryExA("advapi32.dll", NULL,
-				LOAD_LIBRARY_SEARCH_SYSTEM32);
-	if (!advapi)
-		die("failed to load advapi32.dll");
-
-	/* get function pointers */
-	CredWriteW = (CredWriteWT)GetProcAddress(advapi, "CredWriteW");
-	CredEnumerateW = (CredEnumerateWT)GetProcAddress(advapi,
-	    "CredEnumerateW");
-	CredFree = (CredFreeT)GetProcAddress(advapi, "CredFree");
-	CredDeleteW = (CredDeleteWT)GetProcAddress(advapi, "CredDeleteW");
-	if (!CredWriteW || !CredEnumerateW || !CredFree || !CredDeleteW)
-		die("failed to load functions");
-}
-
 static WCHAR *wusername, *password, *protocol, *host, *path, target[1024];
 
 static void write_item(const char *what, LPCWSTR wbuf, int wlen)
@@ -300,8 +243,6 @@ int main(int argc, char *argv[])
 
 	read_credential();
 
-	load_cred_funcs();
-
 	if (!protocol || !(host || path))
 		return 0;
 

base-commit: 27d43aaaf50ef0ae014b88bba294f93658016a2e
-- 
gitgitgadget

^ permalink raw reply related	[flat|nested] 3+ messages in thread

* Re: [PATCH] credential/wincred: include wincred.h
  2023-03-25  1:23 [PATCH] credential/wincred: include wincred.h M Hickford via GitGitGadget
@ 2023-03-28 12:15 ` Johannes Schindelin
  2023-03-30  6:04   ` M Hickford
  0 siblings, 1 reply; 3+ messages in thread
From: Johannes Schindelin @ 2023-03-28 12:15 UTC (permalink / raw)
  To: M Hickford via GitGitGadget
  Cc: git, Johannes Sixt, Harshil Jani, M Hickford, M Hickford

Hi M,

On Sat, 25 Mar 2023, M Hickford via GitGitGadget wrote:

> From: M Hickford <mirth.hickford@gmail.com>
>
> Delete redundant definitions. Mingw-w64 has wincred.h since 2007 [1].
>
> [1] https://github.com/mingw-w64/mingw-w64/blob/9d937a7f4f766f903c9433044f77bfa97a0bc1d8/mingw-w64-headers/include/wincred.h

Sounds good, and the diffstat is nice. But not as nice as it would look if
we retired the `wincred` helper. As I pointed out in
https://lore.kernel.org/git/35e1ebe6-e15b-1712-f030-70ab708740db@gmx.de/,
I'd much rather spend my time on other things than reviewing patches to a
credential helper I consider unsafe.

Ciao,
Johannes

>
> Signed-off-by: M Hickford <mirth.hickford@gmail.com>
> ---
>     credential/wincred: include wincred.h
>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1496%2Fhickford%2Fwincred-v1
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1496/hickford/wincred-v1
> Pull-Request: https://github.com/gitgitgadget/git/pull/1496
>
>  .../wincred/git-credential-wincred.c          | 61 +------------------
>  1 file changed, 1 insertion(+), 60 deletions(-)
>
> diff --git a/contrib/credential/wincred/git-credential-wincred.c b/contrib/credential/wincred/git-credential-wincred.c
> index ead6e267c78..6e5a91a7168 100644
> --- a/contrib/credential/wincred/git-credential-wincred.c
> +++ b/contrib/credential/wincred/git-credential-wincred.c
> @@ -6,6 +6,7 @@
>  #include <stdio.h>
>  #include <io.h>
>  #include <fcntl.h>
> +#include <wincred.h>
>
>  /* common helpers */
>
> @@ -33,64 +34,6 @@ static void *xmalloc(size_t size)
>  	return ret;
>  }
>
> -/* MinGW doesn't have wincred.h, so we need to define stuff */
> -
> -typedef struct _CREDENTIAL_ATTRIBUTEW {
> -	LPWSTR Keyword;
> -	DWORD  Flags;
> -	DWORD  ValueSize;
> -	LPBYTE Value;
> -} CREDENTIAL_ATTRIBUTEW, *PCREDENTIAL_ATTRIBUTEW;
> -
> -typedef struct _CREDENTIALW {
> -	DWORD                  Flags;
> -	DWORD                  Type;
> -	LPWSTR                 TargetName;
> -	LPWSTR                 Comment;
> -	FILETIME               LastWritten;
> -	DWORD                  CredentialBlobSize;
> -	LPBYTE                 CredentialBlob;
> -	DWORD                  Persist;
> -	DWORD                  AttributeCount;
> -	PCREDENTIAL_ATTRIBUTEW Attributes;
> -	LPWSTR                 TargetAlias;
> -	LPWSTR                 UserName;
> -} CREDENTIALW, *PCREDENTIALW;
> -
> -#define CRED_TYPE_GENERIC 1
> -#define CRED_PERSIST_LOCAL_MACHINE 2
> -#define CRED_MAX_ATTRIBUTES 64
> -
> -typedef BOOL (WINAPI *CredWriteWT)(PCREDENTIALW, DWORD);
> -typedef BOOL (WINAPI *CredEnumerateWT)(LPCWSTR, DWORD, DWORD *,
> -    PCREDENTIALW **);
> -typedef VOID (WINAPI *CredFreeT)(PVOID);
> -typedef BOOL (WINAPI *CredDeleteWT)(LPCWSTR, DWORD, DWORD);
> -
> -static HMODULE advapi;
> -static CredWriteWT CredWriteW;
> -static CredEnumerateWT CredEnumerateW;
> -static CredFreeT CredFree;
> -static CredDeleteWT CredDeleteW;
> -
> -static void load_cred_funcs(void)
> -{
> -	/* load DLLs */
> -	advapi = LoadLibraryExA("advapi32.dll", NULL,
> -				LOAD_LIBRARY_SEARCH_SYSTEM32);
> -	if (!advapi)
> -		die("failed to load advapi32.dll");
> -
> -	/* get function pointers */
> -	CredWriteW = (CredWriteWT)GetProcAddress(advapi, "CredWriteW");
> -	CredEnumerateW = (CredEnumerateWT)GetProcAddress(advapi,
> -	    "CredEnumerateW");
> -	CredFree = (CredFreeT)GetProcAddress(advapi, "CredFree");
> -	CredDeleteW = (CredDeleteWT)GetProcAddress(advapi, "CredDeleteW");
> -	if (!CredWriteW || !CredEnumerateW || !CredFree || !CredDeleteW)
> -		die("failed to load functions");
> -}
> -
>  static WCHAR *wusername, *password, *protocol, *host, *path, target[1024];
>
>  static void write_item(const char *what, LPCWSTR wbuf, int wlen)
> @@ -300,8 +243,6 @@ int main(int argc, char *argv[])
>
>  	read_credential();
>
> -	load_cred_funcs();
> -
>  	if (!protocol || !(host || path))
>  		return 0;
>
>
> base-commit: 27d43aaaf50ef0ae014b88bba294f93658016a2e
> --
> gitgitgadget
>

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] credential/wincred: include wincred.h
  2023-03-28 12:15 ` Johannes Schindelin
@ 2023-03-30  6:04   ` M Hickford
  0 siblings, 0 replies; 3+ messages in thread
From: M Hickford @ 2023-03-30  6:04 UTC (permalink / raw)
  To: Johannes Schindelin
  Cc: M Hickford via GitGitGadget, git, Johannes Sixt, Harshil Jani,
	M Hickford

On Tue, 28 Mar 2023 at 13:15, Johannes Schindelin
<Johannes.Schindelin@gmx.de> wrote:
>
> Hi M,
>
> On Sat, 25 Mar 2023, M Hickford via GitGitGadget wrote:
>
> > From: M Hickford <mirth.hickford@gmail.com>
> >
> > Delete redundant definitions. Mingw-w64 has wincred.h since 2007 [1].
> >
> > [1] https://github.com/mingw-w64/mingw-w64/blob/9d937a7f4f766f903c9433044f77bfa97a0bc1d8/mingw-w64-headers/include/wincred.h
>
> Sounds good, and the diffstat is nice. But not as nice as it would look if
> we retired the `wincred` helper. As I pointed out in
> https://lore.kernel.org/git/35e1ebe6-e15b-1712-f030-70ab708740db@gmx.de/,
> I'd much rather spend my time on other things than reviewing patches to a
> credential helper I consider unsafe.

Thanks Johannes for your reply. What do you mean by "unsafe"? Not
useful in the modern world of 2FA? Doch! You can use
git-credential-wincred to store OAuth credentials [1].

For storage, both git-credential-wincred and Git Credential Manager
use the same wincred.h CredWrite API [2]. This is surely preferable
to plaintext git-credential-store [3].

[1] https://lore.kernel.org/git/CAGJzqs=D8hmcxJKGCcz-NqEQ+QDYgi_aO02fj59kQoHZgiW3OQ@mail.gmail.com/T/#md6a0bbf7a36801652c16afe6f5c9dbd19914b2a7
[2] https://github.com/git-ecosystem/git-credential-manager/blob/main/src/shared/Core/Interop/Windows/WindowsCredentialManager.cs
[3] https://lore.kernel.org/git/CAGJzqskRYN49SeS8kSEN5-vbB_Jt1QvAV9QhS6zNuKh0u8wxPQ@mail.gmail.com/


>
> Ciao,
> Johannes
>
> >
> > Signed-off-by: M Hickford <mirth.hickford@gmail.com>
> > ---
> >     credential/wincred: include wincred.h
> >
> > Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1496%2Fhickford%2Fwincred-v1
> > Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1496/hickford/wincred-v1
> > Pull-Request: https://github.com/gitgitgadget/git/pull/1496
> >
> >  .../wincred/git-credential-wincred.c          | 61 +------------------
> >  1 file changed, 1 insertion(+), 60 deletions(-)
> >
> > diff --git a/contrib/credential/wincred/git-credential-wincred.c b/contrib/credential/wincred/git-credential-wincred.c
> > index ead6e267c78..6e5a91a7168 100644
> > --- a/contrib/credential/wincred/git-credential-wincred.c
> > +++ b/contrib/credential/wincred/git-credential-wincred.c
> > @@ -6,6 +6,7 @@
> >  #include <stdio.h>
> >  #include <io.h>
> >  #include <fcntl.h>
> > +#include <wincred.h>
> >
> >  /* common helpers */
> >
> > @@ -33,64 +34,6 @@ static void *xmalloc(size_t size)
> >       return ret;
> >  }
> >
> > -/* MinGW doesn't have wincred.h, so we need to define stuff */
> > -
> > -typedef struct _CREDENTIAL_ATTRIBUTEW {
> > -     LPWSTR Keyword;
> > -     DWORD  Flags;
> > -     DWORD  ValueSize;
> > -     LPBYTE Value;
> > -} CREDENTIAL_ATTRIBUTEW, *PCREDENTIAL_ATTRIBUTEW;
> > -
> > -typedef struct _CREDENTIALW {
> > -     DWORD                  Flags;
> > -     DWORD                  Type;
> > -     LPWSTR                 TargetName;
> > -     LPWSTR                 Comment;
> > -     FILETIME               LastWritten;
> > -     DWORD                  CredentialBlobSize;
> > -     LPBYTE                 CredentialBlob;
> > -     DWORD                  Persist;
> > -     DWORD                  AttributeCount;
> > -     PCREDENTIAL_ATTRIBUTEW Attributes;
> > -     LPWSTR                 TargetAlias;
> > -     LPWSTR                 UserName;
> > -} CREDENTIALW, *PCREDENTIALW;
> > -
> > -#define CRED_TYPE_GENERIC 1
> > -#define CRED_PERSIST_LOCAL_MACHINE 2
> > -#define CRED_MAX_ATTRIBUTES 64
> > -
> > -typedef BOOL (WINAPI *CredWriteWT)(PCREDENTIALW, DWORD);
> > -typedef BOOL (WINAPI *CredEnumerateWT)(LPCWSTR, DWORD, DWORD *,
> > -    PCREDENTIALW **);
> > -typedef VOID (WINAPI *CredFreeT)(PVOID);
> > -typedef BOOL (WINAPI *CredDeleteWT)(LPCWSTR, DWORD, DWORD);
> > -
> > -static HMODULE advapi;
> > -static CredWriteWT CredWriteW;
> > -static CredEnumerateWT CredEnumerateW;
> > -static CredFreeT CredFree;
> > -static CredDeleteWT CredDeleteW;
> > -
> > -static void load_cred_funcs(void)
> > -{
> > -     /* load DLLs */
> > -     advapi = LoadLibraryExA("advapi32.dll", NULL,
> > -                             LOAD_LIBRARY_SEARCH_SYSTEM32);
> > -     if (!advapi)
> > -             die("failed to load advapi32.dll");
> > -
> > -     /* get function pointers */
> > -     CredWriteW = (CredWriteWT)GetProcAddress(advapi, "CredWriteW");
> > -     CredEnumerateW = (CredEnumerateWT)GetProcAddress(advapi,
> > -         "CredEnumerateW");
> > -     CredFree = (CredFreeT)GetProcAddress(advapi, "CredFree");
> > -     CredDeleteW = (CredDeleteWT)GetProcAddress(advapi, "CredDeleteW");
> > -     if (!CredWriteW || !CredEnumerateW || !CredFree || !CredDeleteW)
> > -             die("failed to load functions");
> > -}
> > -
> >  static WCHAR *wusername, *password, *protocol, *host, *path, target[1024];
> >
> >  static void write_item(const char *what, LPCWSTR wbuf, int wlen)
> > @@ -300,8 +243,6 @@ int main(int argc, char *argv[])
> >
> >       read_credential();
> >
> > -     load_cred_funcs();
> > -
> >       if (!protocol || !(host || path))
> >               return 0;
> >
> >
> > base-commit: 27d43aaaf50ef0ae014b88bba294f93658016a2e
> > --
> > gitgitgadget
> >

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2023-03-30  6:04 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-03-25  1:23 [PATCH] credential/wincred: include wincred.h M Hickford via GitGitGadget
2023-03-28 12:15 ` Johannes Schindelin
2023-03-30  6:04   ` M Hickford

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