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Diffstat (limited to 'src/hash/sha1/win32.c')
-rw-r--r--src/hash/sha1/win32.c333
1 files changed, 0 insertions, 333 deletions
diff --git a/src/hash/sha1/win32.c b/src/hash/sha1/win32.c
deleted file mode 100644
index a6e7061c6..000000000
--- a/src/hash/sha1/win32.c
+++ /dev/null
@@ -1,333 +0,0 @@
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-
-#include "win32.h"
-
-#include "runtime.h"
-
-#include <wincrypt.h>
-#include <strsafe.h>
-
-#define GIT_HASH_CNG_DLL_NAME "bcrypt.dll"
-
-/* BCRYPT_SHA1_ALGORITHM */
-#define GIT_HASH_CNG_HASH_TYPE L"SHA1"
-
-/* BCRYPT_OBJECT_LENGTH */
-#define GIT_HASH_CNG_HASH_OBJECT_LEN L"ObjectLength"
-
-/* BCRYPT_HASH_REUSEABLE_FLAGS */
-#define GIT_HASH_CNG_HASH_REUSABLE 0x00000020
-
-static git_hash_prov hash_prov = {0};
-
-/* Hash initialization */
-
-/* Initialize CNG, if available */
-GIT_INLINE(int) hash_cng_prov_init(void)
-{
- char dll_path[MAX_PATH];
- DWORD dll_path_len, size_len;
-
- /* Only use CNG on Windows 2008 / Vista SP1 or better (Windows 6.0 SP1) */
- if (!git_has_win32_version(6, 0, 1)) {
- git_error_set(GIT_ERROR_SHA1, "CryptoNG is not supported on this platform");
- return -1;
- }
-
- /* Load bcrypt.dll explicitly from the system directory */
- if ((dll_path_len = GetSystemDirectory(dll_path, MAX_PATH)) == 0 ||
- dll_path_len > MAX_PATH ||
- StringCchCat(dll_path, MAX_PATH, "\\") < 0 ||
- StringCchCat(dll_path, MAX_PATH, GIT_HASH_CNG_DLL_NAME) < 0 ||
- (hash_prov.prov.cng.dll = LoadLibrary(dll_path)) == NULL) {
- git_error_set(GIT_ERROR_SHA1, "CryptoNG library could not be loaded");
- return -1;
- }
-
- /* Load the function addresses */
- if ((hash_prov.prov.cng.open_algorithm_provider = (hash_win32_cng_open_algorithm_provider_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptOpenAlgorithmProvider")) == NULL ||
- (hash_prov.prov.cng.get_property = (hash_win32_cng_get_property_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptGetProperty")) == NULL ||
- (hash_prov.prov.cng.create_hash = (hash_win32_cng_create_hash_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptCreateHash")) == NULL ||
- (hash_prov.prov.cng.finish_hash = (hash_win32_cng_finish_hash_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptFinishHash")) == NULL ||
- (hash_prov.prov.cng.hash_data = (hash_win32_cng_hash_data_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptHashData")) == NULL ||
- (hash_prov.prov.cng.destroy_hash = (hash_win32_cng_destroy_hash_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptDestroyHash")) == NULL ||
- (hash_prov.prov.cng.close_algorithm_provider = (hash_win32_cng_close_algorithm_provider_fn)GetProcAddress(hash_prov.prov.cng.dll, "BCryptCloseAlgorithmProvider")) == NULL) {
- FreeLibrary(hash_prov.prov.cng.dll);
-
- git_error_set(GIT_ERROR_OS, "CryptoNG functions could not be loaded");
- return -1;
- }
-
- /* Load the SHA1 algorithm */
- if (hash_prov.prov.cng.open_algorithm_provider(&hash_prov.prov.cng.handle, GIT_HASH_CNG_HASH_TYPE, NULL, GIT_HASH_CNG_HASH_REUSABLE) < 0) {
- FreeLibrary(hash_prov.prov.cng.dll);
-
- git_error_set(GIT_ERROR_OS, "algorithm provider could not be initialized");
- return -1;
- }
-
- /* Get storage space for the hash object */
- if (hash_prov.prov.cng.get_property(hash_prov.prov.cng.handle, GIT_HASH_CNG_HASH_OBJECT_LEN, (PBYTE)&hash_prov.prov.cng.hash_object_size, sizeof(DWORD), &size_len, 0) < 0) {
- hash_prov.prov.cng.close_algorithm_provider(hash_prov.prov.cng.handle, 0);
- FreeLibrary(hash_prov.prov.cng.dll);
-
- git_error_set(GIT_ERROR_OS, "algorithm handle could not be found");
- return -1;
- }
-
- hash_prov.type = CNG;
- return 0;
-}
-
-GIT_INLINE(void) hash_cng_prov_shutdown(void)
-{
- hash_prov.prov.cng.close_algorithm_provider(hash_prov.prov.cng.handle, 0);
- FreeLibrary(hash_prov.prov.cng.dll);
-
- hash_prov.type = INVALID;
-}
-
-/* Initialize CryptoAPI */
-GIT_INLINE(int) hash_cryptoapi_prov_init()
-{
- if (!CryptAcquireContext(&hash_prov.prov.cryptoapi.handle, NULL, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
- git_error_set(GIT_ERROR_OS, "legacy hash context could not be started");
- return -1;
- }
-
- hash_prov.type = CRYPTOAPI;
- return 0;
-}
-
-GIT_INLINE(void) hash_cryptoapi_prov_shutdown(void)
-{
- CryptReleaseContext(hash_prov.prov.cryptoapi.handle, 0);
-
- hash_prov.type = INVALID;
-}
-
-static void sha1_shutdown(void)
-{
- if (hash_prov.type == CNG)
- hash_cng_prov_shutdown();
- else if(hash_prov.type == CRYPTOAPI)
- hash_cryptoapi_prov_shutdown();
-}
-
-int git_hash_sha1_global_init(void)
-{
- int error = 0;
-
- if (hash_prov.type != INVALID)
- return 0;
-
- if ((error = hash_cng_prov_init()) < 0)
- error = hash_cryptoapi_prov_init();
-
- if (!error)
- error = git_runtime_shutdown_register(sha1_shutdown);
-
- return error;
-}
-
-/* CryptoAPI: available in Windows XP and newer */
-
-GIT_INLINE(int) hash_ctx_cryptoapi_init(git_hash_sha1_ctx *ctx)
-{
- ctx->type = CRYPTOAPI;
- ctx->prov = &hash_prov;
-
- return git_hash_sha1_init(ctx);
-}
-
-GIT_INLINE(int) hash_cryptoapi_init(git_hash_sha1_ctx *ctx)
-{
- if (ctx->ctx.cryptoapi.valid)
- CryptDestroyHash(ctx->ctx.cryptoapi.hash_handle);
-
- if (!CryptCreateHash(ctx->prov->prov.cryptoapi.handle, CALG_SHA1, 0, 0, &ctx->ctx.cryptoapi.hash_handle)) {
- ctx->ctx.cryptoapi.valid = 0;
- git_error_set(GIT_ERROR_OS, "legacy hash implementation could not be created");
- return -1;
- }
-
- ctx->ctx.cryptoapi.valid = 1;
- return 0;
-}
-
-GIT_INLINE(int) hash_cryptoapi_update(git_hash_sha1_ctx *ctx, const void *_data, size_t len)
-{
- const BYTE *data = (BYTE *)_data;
-
- GIT_ASSERT(ctx->ctx.cryptoapi.valid);
-
- while (len > 0) {
- DWORD chunk = (len > MAXDWORD) ? MAXDWORD : (DWORD)len;
-
- if (!CryptHashData(ctx->ctx.cryptoapi.hash_handle, data, chunk, 0)) {
- git_error_set(GIT_ERROR_OS, "legacy hash data could not be updated");
- return -1;
- }
-
- data += chunk;
- len -= chunk;
- }
-
- return 0;
-}
-
-GIT_INLINE(int) hash_cryptoapi_final(git_oid *out, git_hash_sha1_ctx *ctx)
-{
- DWORD len = 20;
- int error = 0;
-
- GIT_ASSERT(ctx->ctx.cryptoapi.valid);
-
- if (!CryptGetHashParam(ctx->ctx.cryptoapi.hash_handle, HP_HASHVAL, out->id, &len, 0)) {
- git_error_set(GIT_ERROR_OS, "legacy hash data could not be finished");
- error = -1;
- }
-
- CryptDestroyHash(ctx->ctx.cryptoapi.hash_handle);
- ctx->ctx.cryptoapi.valid = 0;
-
- return error;
-}
-
-GIT_INLINE(void) hash_ctx_cryptoapi_cleanup(git_hash_sha1_ctx *ctx)
-{
- if (ctx->ctx.cryptoapi.valid)
- CryptDestroyHash(ctx->ctx.cryptoapi.hash_handle);
-}
-
-/* CNG: Available in Windows Server 2008 and newer */
-
-GIT_INLINE(int) hash_ctx_cng_init(git_hash_sha1_ctx *ctx)
-{
- if ((ctx->ctx.cng.hash_object = git__malloc(hash_prov.prov.cng.hash_object_size)) == NULL)
- return -1;
-
- if (hash_prov.prov.cng.create_hash(hash_prov.prov.cng.handle, &ctx->ctx.cng.hash_handle, ctx->ctx.cng.hash_object, hash_prov.prov.cng.hash_object_size, NULL, 0, 0) < 0) {
- git__free(ctx->ctx.cng.hash_object);
-
- git_error_set(GIT_ERROR_OS, "hash implementation could not be created");
- return -1;
- }
-
- ctx->type = CNG;
- ctx->prov = &hash_prov;
-
- return 0;
-}
-
-GIT_INLINE(int) hash_cng_init(git_hash_sha1_ctx *ctx)
-{
- BYTE hash[GIT_OID_RAWSZ];
-
- if (!ctx->ctx.cng.updated)
- return 0;
-
- /* CNG needs to be finished to restart */
- if (ctx->prov->prov.cng.finish_hash(ctx->ctx.cng.hash_handle, hash, GIT_OID_RAWSZ, 0) < 0) {
- git_error_set(GIT_ERROR_OS, "hash implementation could not be finished");
- return -1;
- }
-
- ctx->ctx.cng.updated = 0;
-
- return 0;
-}
-
-GIT_INLINE(int) hash_cng_update(git_hash_sha1_ctx *ctx, const void *_data, size_t len)
-{
- PBYTE data = (PBYTE)_data;
-
- while (len > 0) {
- ULONG chunk = (len > ULONG_MAX) ? ULONG_MAX : (ULONG)len;
-
- if (ctx->prov->prov.cng.hash_data(ctx->ctx.cng.hash_handle, data, chunk, 0) < 0) {
- git_error_set(GIT_ERROR_OS, "hash could not be updated");
- return -1;
- }
-
- data += chunk;
- len -= chunk;
- }
-
- return 0;
-}
-
-GIT_INLINE(int) hash_cng_final(git_oid *out, git_hash_sha1_ctx *ctx)
-{
- if (ctx->prov->prov.cng.finish_hash(ctx->ctx.cng.hash_handle, out->id, GIT_OID_RAWSZ, 0) < 0) {
- git_error_set(GIT_ERROR_OS, "hash could not be finished");
- return -1;
- }
-
- ctx->ctx.cng.updated = 0;
-
- return 0;
-}
-
-GIT_INLINE(void) hash_ctx_cng_cleanup(git_hash_sha1_ctx *ctx)
-{
- ctx->prov->prov.cng.destroy_hash(ctx->ctx.cng.hash_handle);
- git__free(ctx->ctx.cng.hash_object);
-}
-
-/* Indirection between CryptoAPI and CNG */
-
-int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
-{
- int error = 0;
-
- GIT_ASSERT_ARG(ctx);
-
- /*
- * When compiled with GIT_THREADS, the global hash_prov data is
- * initialized with git_libgit2_init. Otherwise, it must be initialized
- * at first use.
- */
- if (hash_prov.type == INVALID && (error = git_hash_sha1_global_init()) < 0)
- return error;
-
- memset(ctx, 0x0, sizeof(git_hash_sha1_ctx));
-
- return (hash_prov.type == CNG) ? hash_ctx_cng_init(ctx) : hash_ctx_cryptoapi_init(ctx);
-}
-
-int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
-{
- GIT_ASSERT_ARG(ctx);
- GIT_ASSERT_ARG(ctx->type);
- return (ctx->type == CNG) ? hash_cng_init(ctx) : hash_cryptoapi_init(ctx);
-}
-
-int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)
-{
- GIT_ASSERT_ARG(ctx);
- GIT_ASSERT_ARG(ctx->type);
- return (ctx->type == CNG) ? hash_cng_update(ctx, data, len) : hash_cryptoapi_update(ctx, data, len);
-}
-
-int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
-{
- GIT_ASSERT_ARG(ctx);
- GIT_ASSERT_ARG(ctx->type);
- return (ctx->type == CNG) ? hash_cng_final(out, ctx) : hash_cryptoapi_final(out, ctx);
-}
-
-void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
-{
- if (!ctx)
- return;
- else if (ctx->type == CNG)
- hash_ctx_cng_cleanup(ctx);
- else if(ctx->type == CRYPTOAPI)
- hash_ctx_cryptoapi_cleanup(ctx);
-}
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