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wine-staging/patches/bcrypt-ECDHSecretAgreement/0001-bcrypt-Implement-BCryptSecretAgreement-with-libgcryp.patch

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From 7fcdf1faa257c90d6452f26ad3a68daca1dd96d1 Mon Sep 17 00:00:00 2001
From: Derek Lesho <dlesho@codeweavers.com>
Date: Tue, 7 Jan 2020 14:22:49 -0600
Subject: [PATCH] bcrypt: Implement BCryptSecretAgreement with libgcrypt.
Signed-off-by: Derek Lesho <dlesho@codeweavers.com>
---
configure.ac | 14 ++
dlls/bcrypt/Makefile.in | 1 +
dlls/bcrypt/bcrypt_internal.h | 6 +
dlls/bcrypt/bcrypt_main.c | 54 ++++++-
dlls/bcrypt/gcrypt.c | 263 ++++++++++++++++++++++++++++++++++
dlls/bcrypt/gnutls.c | 9 ++
dlls/bcrypt/macos.c | 6 +
dlls/bcrypt/tests/bcrypt.c | 2 +-
8 files changed, 349 insertions(+), 6 deletions(-)
create mode 100644 dlls/bcrypt/gcrypt.c
diff --git a/configure.ac b/configure.ac
index 006087e05ec..b50737a766e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,7 @@ AC_ARG_WITH(faudio, AS_HELP_STRING([--without-faudio],[do not use FAudio (XAu
AC_ARG_WITH(float-abi, AS_HELP_STRING([--with-float-abi=abi],[specify the ABI (soft|softfp|hard) for ARM platforms]))
AC_ARG_WITH(fontconfig,AS_HELP_STRING([--without-fontconfig],[do not use fontconfig]))
AC_ARG_WITH(freetype, AS_HELP_STRING([--without-freetype],[do not use the FreeType library]))
+AC_ARG_WITH(gcrypt, AS_HELP_STRING([--without-gcrypt],[do not use libgcrypt]))
AC_ARG_WITH(gettext, AS_HELP_STRING([--without-gettext],[do not use gettext]))
AC_ARG_WITH(gettextpo, AS_HELP_STRING([--with-gettextpo],[use the GetTextPO library to rebuild po files]),
[if test "x$withval" = "xno"; then ac_cv_header_gettext_po_h=no; fi])
@@ -2044,6 +2045,19 @@ WINE_NOTICE_WITH(vkd3d,[test "x$ac_cv_lib_soname_vkd3d" = "x"],
[vkd3d ${notice_platform}development files not found (or too old), Direct3D 12 won't be supported.])
test "x$ac_cv_lib_soname_vkd3d" != "x" || enable_d3d12=${enable_d3d12:-no}
+dnl **** Check for gcrypt ****
+if test "x$with_gcrypt" != "xno"
+then
+ WINE_PACKAGE_FLAGS(GCRYPT,[libgcrypt],,,,
+ [AC_CHECK_HEADERS([gcrypt.h])
+ if test "$ac_cv_header_gcrypt_h" = "yes"
+ then
+ WINE_CHECK_SONAME(gcrypt,gcry_sexp_build,,,[$GCRYPT_LIBS])
+ fi])
+fi
+WINE_NOTICE_WITH(gcrypt,[test "x$ac_cv_lib_soname_gcrypt" = "x"],
+ [libgcrypt ${notice_platform}development files not found, GCRYPT won't be supported.])
+
dnl **** Check for gcc specific options ****
AC_SUBST(EXTRACFLAGS,"")
diff --git a/dlls/bcrypt/Makefile.in b/dlls/bcrypt/Makefile.in
index dd6d4a76640..ea3486a4002 100644
--- a/dlls/bcrypt/Makefile.in
+++ b/dlls/bcrypt/Makefile.in
@@ -5,6 +5,7 @@ EXTRAINCL = $(GNUTLS_CFLAGS)
C_SRCS = \
bcrypt_main.c \
+ gcrypt.c \
gnutls.c \
macos.c \
md2.c \
diff --git a/dlls/bcrypt/bcrypt_internal.h b/dlls/bcrypt/bcrypt_internal.h
index 43be170d77f..6c93ed78389 100644
--- a/dlls/bcrypt/bcrypt_internal.h
+++ b/dlls/bcrypt/bcrypt_internal.h
@@ -25,6 +25,9 @@
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <gnutls/abstract.h>
+#ifdef SONAME_LIBGCRYPT
+#include <gcrypt.h>
+#endif
#elif HAVE_COMMONCRYPTO_COMMONCRYPTOR_H
#include <AvailabilityMacros.h>
#include <CommonCrypto/CommonCryptor.h>
@@ -243,6 +246,8 @@ struct key
struct secret
{
struct object hdr;
+ UCHAR *data;
+ ULONG len;
};
NTSTATUS get_alg_property( const struct algorithm *, const WCHAR *, UCHAR *, ULONG, ULONG * ) DECLSPEC_HIDDEN;
@@ -264,6 +269,7 @@ NTSTATUS key_export_dsa_capi( struct key *, UCHAR *, ULONG, ULONG * ) DECLSPEC_H
NTSTATUS key_export_ecc( struct key *, UCHAR *, ULONG, ULONG * ) DECLSPEC_HIDDEN;
NTSTATUS key_import_dsa_capi( struct key *, UCHAR *, ULONG ) DECLSPEC_HIDDEN;
NTSTATUS key_import_ecc( struct key *, UCHAR *, ULONG ) DECLSPEC_HIDDEN;
+NTSTATUS compute_secret_ecc (struct key *pubkey_in, struct key *privkey_in, struct secret *secret) DECLSPEC_HIDDEN;
BOOL is_zero_vector( const UCHAR *, ULONG ) DECLSPEC_HIDDEN;
BOOL is_equal_vector( const UCHAR *, ULONG, const UCHAR *, ULONG ) DECLSPEC_HIDDEN;
diff --git a/dlls/bcrypt/bcrypt_main.c b/dlls/bcrypt/bcrypt_main.c
index cd3b746e295..7b2a3393902 100644
--- a/dlls/bcrypt/bcrypt_main.c
+++ b/dlls/bcrypt/bcrypt_main.c
@@ -1425,6 +1425,12 @@ NTSTATUS key_import_ecc( struct key *key, UCHAR *input, ULONG len )
ERR( "support for keys not available at build time\n" );
return STATUS_NOT_IMPLEMENTED;
}
+
+NTSTATUS compute_secret_ecc (struct key *pubkey_in, struct key *privkey_in, struct secret *secret)
+{
+ ERR( "support for secrets not available at build time\n" );
+ return STATUS_NOT_IMPLEMENTED;
+}
#endif
NTSTATUS WINAPI BCryptGenerateSymmetricKey( BCRYPT_ALG_HANDLE algorithm, BCRYPT_KEY_HANDLE *handle,
@@ -1842,8 +1848,9 @@ NTSTATUS WINAPI BCryptSecretAgreement(BCRYPT_KEY_HANDLE privatekey, BCRYPT_KEY_H
struct key *privkey = privatekey;
struct key *pubkey = publickey;
struct secret *secret;
+ NTSTATUS status;
- FIXME( "%p, %p, %p, %08x\n", privatekey, publickey, handle, flags );
+ TRACE( "%p, %p, %p, %08x\n", privatekey, publickey, handle, flags );
if (!privkey || privkey->hdr.magic != MAGIC_KEY) return STATUS_INVALID_HANDLE;
if (!pubkey || pubkey->hdr.magic != MAGIC_KEY) return STATUS_INVALID_HANDLE;
@@ -1852,7 +1859,16 @@ NTSTATUS WINAPI BCryptSecretAgreement(BCRYPT_KEY_HANDLE privatekey, BCRYPT_KEY_H
if (!(secret = heap_alloc_zero( sizeof(*secret) ))) return STATUS_NO_MEMORY;
secret->hdr.magic = MAGIC_SECRET;
- *handle = secret;
+ if ((status = compute_secret_ecc( privkey, pubkey, secret )))
+ {
+ heap_free( secret );
+ *handle = NULL;
+ }
+ else
+ {
+ *handle = secret;
+ }
+
return STATUS_SUCCESS;
}
@@ -1860,10 +1876,11 @@ NTSTATUS WINAPI BCryptDestroySecret(BCRYPT_SECRET_HANDLE handle)
{
struct secret *secret = handle;
- FIXME( "%p\n", handle );
+ TRACE( "%p\n", handle );
if (!secret || secret->hdr.magic != MAGIC_SECRET) return STATUS_INVALID_HANDLE;
secret->hdr.magic = 0;
+ heap_free( secret->data );
heap_free( secret );
return STATUS_SUCCESS;
}
@@ -1873,12 +1890,33 @@ NTSTATUS WINAPI BCryptDeriveKey(BCRYPT_SECRET_HANDLE handle, LPCWSTR kdf, BCrypt
{
struct secret *secret = handle;
- FIXME( "%p, %s, %p, %p, %d, %p, %08x\n", secret, debugstr_w(kdf), parameter, derived, derived_size, result, flags );
+ TRACE( "%p, %s, %p, %p, %d, %p, %08x\n", secret, debugstr_w(kdf), parameter, derived, derived_size, result, flags );
if (!secret || secret->hdr.magic != MAGIC_SECRET) return STATUS_INVALID_HANDLE;
if (!kdf) return STATUS_INVALID_PARAMETER;
- return STATUS_INTERNAL_ERROR;
+ if (!(strcmpW( kdf, BCRYPT_KDF_RAW_SECRET )))
+ {
+ ULONG n;
+ ULONG secret_length = secret->len;
+
+ if (!derived)
+ {
+ *result = secret_length;
+ return STATUS_SUCCESS;
+ }
+
+ /* outputs in little endian for some reason */
+ for (n = 0; n < secret_length && n < derived_size; n++)
+ {
+ derived[n] = secret->data[secret_length - n - 1];
+ }
+
+ *result = n;
+ return STATUS_SUCCESS;
+ }
+ FIXME( "Derivation function %s not supported.\n", debugstr_w(kdf) );
+ return STATUS_NOT_IMPLEMENTED;
}
BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
@@ -1890,6 +1928,9 @@ BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
DisableThreadLibraryCalls( hinst );
#ifdef HAVE_GNUTLS_CIPHER_INIT
gnutls_initialize();
+#ifdef SONAME_LIBGCRYPT
+ gcrypt_initialize();
+#endif
#endif
break;
@@ -1897,6 +1938,9 @@ BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
if (reserved) break;
#ifdef HAVE_GNUTLS_CIPHER_INIT
gnutls_uninitialize();
+#ifdef SONAME_LIBGCRYPT
+ gcrypt_uninitialize();
+#endif
#endif
break;
}
diff --git a/dlls/bcrypt/gcrypt.c b/dlls/bcrypt/gcrypt.c
new file mode 100644
index 00000000000..4e0386a3dda
--- /dev/null
+++ b/dlls/bcrypt/gcrypt.c
@@ -0,0 +1,263 @@
+#include "config.h"
+#include "wine/port.h"
+
+#include <stdarg.h>
+#ifdef HAVE_GNUTLS_CIPHER_INIT
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+#include <gnutls/abstract.h>
+#ifdef HAVE_LIBGCRYPT
+#include <libgcrypt/libgcrypt.h>
+#endif
+#endif
+
+#include "ntstatus.h"
+#define WIN32_NO_STATUS
+#include "windef.h"
+#include "winbase.h"
+#include "bcrypt.h"
+
+#include "bcrypt_internal.h"
+
+#include "wine/debug.h"
+#include "wine/heap.h"
+#include "wine/unicode.h"
+
+#if defined(HAVE_GNUTLS_CIPHER_INIT) && defined(SONAME_LIBGCRYPT)
+WINE_DEFAULT_DEBUG_CHANNEL(bcrypt);
+WINE_DECLARE_DEBUG_CHANNEL(winediag);
+
+static void *libgcrypt_handle;
+#define MAKE_FUNCPTR(f) static typeof(f) * p##f
+MAKE_FUNCPTR(gcry_check_version);
+MAKE_FUNCPTR(gcry_sexp_build);
+MAKE_FUNCPTR(gcry_pk_encrypt);
+MAKE_FUNCPTR(gcry_mpi_new);
+MAKE_FUNCPTR(gcry_mpi_print);
+MAKE_FUNCPTR(gcry_sexp_release);
+MAKE_FUNCPTR(gcry_mpi_release);
+MAKE_FUNCPTR(gcry_strsource);
+MAKE_FUNCPTR(gcry_strerror);
+MAKE_FUNCPTR(gcry_sexp_find_token);
+MAKE_FUNCPTR(gcry_sexp_nth_mpi);
+#undef MAKE_FUNCPTR
+
+BOOL gcrypt_initialize(void)
+{
+ if (!(libgcrypt_handle = dlopen( SONAME_LIBGCRYPT, RTLD_NOW)))
+ {
+ ERR_(winediag)( "failed to load libgcrypt, no support for diffie hellman key exchange\n" );
+ return FALSE;
+ }
+
+#define LOAD_FUNCPTR(f) \
+ if (!(p##f = dlsym( libgcrypt_handle, #f))) \
+ { \
+ ERR( "failed to load %s\n", #f ); \
+ goto fail; \
+ }
+
+ LOAD_FUNCPTR(gcry_check_version);
+ LOAD_FUNCPTR(gcry_sexp_build);
+ LOAD_FUNCPTR(gcry_pk_encrypt);
+ LOAD_FUNCPTR(gcry_mpi_new);
+ LOAD_FUNCPTR(gcry_mpi_print);
+ LOAD_FUNCPTR(gcry_sexp_release);
+ LOAD_FUNCPTR(gcry_mpi_release);
+ LOAD_FUNCPTR(gcry_strsource);
+ LOAD_FUNCPTR(gcry_strerror);
+ LOAD_FUNCPTR(gcry_sexp_find_token);
+ LOAD_FUNCPTR(gcry_sexp_nth_mpi);
+#undef LOAD_FUNCPTR
+
+ return TRUE;
+
+fail:
+ dlclose( libgcrypt_handle);
+ libgcrypt_handle = NULL;
+ return FALSE;
+}
+
+
+void gcrypt_uninitialize(void)
+{
+ dlclose( libgcrypt_handle);
+ libgcrypt_handle = NULL;
+}
+
+NTSTATUS extract_result_into_secret(gcry_sexp_t result, struct secret *secret)
+{
+ NTSTATUS status = STATUS_SUCCESS;
+ gcry_mpi_t fullcoords = NULL;
+ gcry_sexp_t fragment = NULL;
+ UCHAR *tmp_buffer = NULL;
+ gcry_error_t err;
+ size_t size;
+
+ fragment = pgcry_sexp_find_token(result, "s", 0);
+ if (!fragment)
+ {
+ status = STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ fullcoords = pgcry_sexp_nth_mpi(fragment, 1, GCRYMPI_FMT_USG);
+ if (!fullcoords)
+ {
+ status = STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ if ((err = pgcry_mpi_print(GCRYMPI_FMT_USG, NULL, 0, &size, fullcoords)))
+ {
+ ERR("Error = %s/%s.\n", pgcry_strsource(err), pgcry_strerror(err));
+ status = STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ tmp_buffer = heap_alloc(size);
+ if ((err = pgcry_mpi_print(GCRYMPI_FMT_STD, tmp_buffer, size, NULL, fullcoords)))
+ {
+ ERR("Error = %s/%s.\n", pgcry_strsource(err), pgcry_strerror(err));
+ status = STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ secret->data = heap_alloc(size / 2);
+ memcpy(secret->data, tmp_buffer + size % 2, size / 2);
+ secret->len = size / 2;
+
+done:
+ heap_free(tmp_buffer);
+
+ pgcry_mpi_release(fullcoords);
+ pgcry_sexp_release(fragment);
+
+ return status;
+}
+
+/* this is necessary since GNUTLS doesn't support ECDH public key encryption, maybe we can replace this when it does:
+ https://github.com/gnutls/gnutls/blob/cdc4fc288d87f91f974aa23b6e8595a53970ce00/lib/nettle/pk.c#L495 */
+NTSTATUS compute_secret_ecc (struct key *privkey_in, struct key *pubkey_in, struct secret *secret)
+{
+ const char *pubkey_format;
+ DWORD key_size;
+ gcry_sexp_t pubkey = NULL;
+ gcry_sexp_t privkey = NULL;
+ gcry_sexp_t xchg_result = NULL;
+ gcry_error_t err;
+ NTSTATUS status = STATUS_SUCCESS;
+
+ if (!libgcrypt_handle)
+ {
+ ERR("Secrets not supported without gcrypt\n");
+ return STATUS_INTERNAL_ERROR;
+ }
+
+ switch (pubkey_in->alg_id)
+ {
+ case ALG_ID_ECDH_P256:
+ pubkey_format = "NIST P-256";
+ key_size = 32;
+ break;
+ default:
+ FIXME("Unsupported algorithm id: %u\n", pubkey_in->alg_id);
+ return STATUS_INTERNAL_ERROR;
+ }
+
+ /* import public key -
+ copy public key into temporary buffer so we can prepend 0x04 (to indicate it is uncompressed) */
+ {
+ UCHAR *public_key_raw = heap_alloc((key_size * 2) + 1);
+ public_key_raw[0] = 0x04;
+ memcpy(public_key_raw + 1, pubkey_in->u.a.pubkey + sizeof(BCRYPT_ECCKEY_BLOB), key_size * 2);
+
+ err = pgcry_sexp_build(&pubkey, NULL,
+ "(key-data(public-key(ecdh(curve %s)(q %b))))",
+ pubkey_format,
+ (key_size * 2) + 1,
+ public_key_raw);
+
+ heap_free(public_key_raw);
+ }
+
+ if (err)
+ {
+ ERR("Failed to build gcrypt public key\n");
+ goto done;
+ }
+
+ /* import private key */
+ /* extract private key from blob structure */
+ {
+ UCHAR *private_key_raw = heap_alloc(key_size);
+ UCHAR *key_blob;
+ ULONG blob_size;
+
+ status = key_export_ecc( privkey_in, NULL, 0, &blob_size );
+ if (status)
+ goto done;
+
+ key_blob = heap_alloc(blob_size);
+ status = key_export_ecc( privkey_in, key_blob, blob_size, &blob_size);
+ if (status)
+ {
+ heap_free(private_key_raw);
+ heap_free(key_blob);
+ goto done;
+ }
+
+ memcpy(private_key_raw, key_blob + sizeof(BCRYPT_ECCKEY_BLOB) + key_size * 2, key_size);
+ heap_free(key_blob);
+
+ err = pgcry_sexp_build(&privkey, NULL,
+ "(data(flags raw)(value %b))",
+ key_size,
+ private_key_raw);
+
+ heap_free(private_key_raw);
+ }
+
+ if (err)
+ {
+ ERR("Failed to build gcrypt private key data\n");
+ goto done;
+ }
+
+ if ((err = pgcry_pk_encrypt(&xchg_result, privkey, pubkey)))
+ {
+ ERR("Failed to perform key exchange\n");
+ goto done;
+ }
+
+ status = extract_result_into_secret(xchg_result, secret);
+ if (status)
+ {
+ ERR("Failed to extract secret key\n");
+ goto done;
+ }
+
+ if (secret->len != key_size)
+ {
+ ERR("got secret size %u, expected %u\n", secret->len, key_size);
+ status = STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ done:
+ pgcry_sexp_release(pubkey);
+ pgcry_sexp_release(privkey);
+ pgcry_sexp_release(xchg_result);
+
+ if (status)
+ {
+ return status;
+ }
+ if (err)
+ {
+ ERR("Error = %s/%s\n", pgcry_strsource (err), pgcry_strerror (err));
+ return STATUS_INTERNAL_ERROR;
+ }
+ return STATUS_SUCCESS;
+}
+#endif
diff --git a/dlls/bcrypt/gnutls.c b/dlls/bcrypt/gnutls.c
index 7acf8198626..8e5481aecc3 100644
--- a/dlls/bcrypt/gnutls.c
+++ b/dlls/bcrypt/gnutls.c
@@ -1606,4 +1606,13 @@ NTSTATUS key_destroy( struct key *key )
heap_free( key );
return STATUS_SUCCESS;
}
+
+#ifndef SONAME_LIBGCRYPT
+NTSTATUS compute_secret_ecc (struct key *pubkey_in, struct key *privkey_in, struct secret *secret)
+{
+ ERR("support for secrets not available without gcrypt\n");
+ return STATUS_NOT_IMPLEMENTED;
+}
+#endif
+
#endif
diff --git a/dlls/bcrypt/macos.c b/dlls/bcrypt/macos.c
index 7f902535b8f..6c2a41a0725 100644
--- a/dlls/bcrypt/macos.c
+++ b/dlls/bcrypt/macos.c
@@ -279,4 +279,10 @@ NTSTATUS key_destroy( struct key *key )
heap_free( key );
return STATUS_SUCCESS;
}
+
+NTSTATUS compute_secret_ecc (struct key *pubkey_in, struct key *privkey_in, struct secret *secret)
+{
+ ERR( "support for secrets not available at build time\n" );
+ return STATUS_NOT_IMPLEMENTED;
+}
#endif
diff --git a/dlls/bcrypt/tests/bcrypt.c b/dlls/bcrypt/tests/bcrypt.c
index 7fdc0ac7fb2..5701a0a30ce 100644
--- a/dlls/bcrypt/tests/bcrypt.c
+++ b/dlls/bcrypt/tests/bcrypt.c
@@ -2115,7 +2115,7 @@ static void test_ECDH(void)
goto raw_secret_end;
}
- todo_wine ok(status == STATUS_SUCCESS, "got %08x\n", status);
+ ok(status == STATUS_SUCCESS, "got %08x\n", status);
if (status != STATUS_SUCCESS)
{
--
2.28.0
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