thodg/libgit2/src/hash/sha1/win32.c
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Hash : 7574564e
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Date : 2019-07-18T13:40:34
sha1: win32: fix compilation due to unknown type In commit bbf034ab9 (hash: move `git_hash_prov` into Win32 backend, 2019-02-22), the `git_hash_prov`'s structure name has been removed in favour of its typedef'ed name. But as we have no CI that compiles with the WinHTTPS hashing backend right now, it wasn't noticed that the implementation that uses this struct wasn't changed correctly. Fix the struct type to make it compile again.
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src/hash/sha1/win32.c
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/* * 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 "global.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(); git__on_shutdown(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; 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; 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; assert(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) { assert(ctx && 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) { assert(ctx && 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) { assert(ctx && 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) { assert(ctx); if (ctx->type == CNG) hash_ctx_cng_cleanup(ctx); else if(ctx->type == CRYPTOAPI) hash_ctx_cryptoapi_cleanup(ctx); }