0f3d578efc
Remove the GPL notification text from the files that were initially contributed by myself. Signed-hostap: Jouni Malinen <j@w1.fi>
783 lines
16 KiB
C
783 lines
16 KiB
C
/*
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* Crypto wrapper for Microsoft CryptoAPI
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* Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include <windows.h>
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#include <wincrypt.h>
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#include "common.h"
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#include "crypto.h"
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#ifndef MS_ENH_RSA_AES_PROV
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#ifdef UNICODE
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#define MS_ENH_RSA_AES_PROV \
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L"Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
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#else
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#define MS_ENH_RSA_AES_PROV \
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"Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
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#endif
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#endif /* MS_ENH_RSA_AES_PROV */
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#ifndef CALG_HMAC
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#define CALG_HMAC (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_HMAC)
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#endif
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#ifdef __MINGW32_VERSION
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/*
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* MinGW does not yet include all the needed definitions for CryptoAPI, so
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* define here whatever extra is needed.
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*/
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static BOOL WINAPI
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(*CryptImportPublicKeyInfo)(HCRYPTPROV hCryptProv, DWORD dwCertEncodingType,
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PCERT_PUBLIC_KEY_INFO pInfo, HCRYPTKEY *phKey)
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= NULL; /* to be loaded from crypt32.dll */
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static int mingw_load_crypto_func(void)
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{
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HINSTANCE dll;
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/* MinGW does not yet have full CryptoAPI support, so load the needed
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* function here. */
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if (CryptImportPublicKeyInfo)
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return 0;
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dll = LoadLibrary("crypt32");
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if (dll == NULL) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
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"library");
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return -1;
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}
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CryptImportPublicKeyInfo = GetProcAddress(
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dll, "CryptImportPublicKeyInfo");
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if (CryptImportPublicKeyInfo == NULL) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
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"CryptImportPublicKeyInfo() address from "
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"crypt32 library");
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return -1;
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}
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return 0;
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}
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#else /* __MINGW32_VERSION */
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static int mingw_load_crypto_func(void)
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{
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return 0;
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}
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#endif /* __MINGW32_VERSION */
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static void cryptoapi_report_error(const char *msg)
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{
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char *s, *pos;
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DWORD err = GetLastError();
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if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM,
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NULL, err, 0, (LPTSTR) &s, 0, NULL) == 0) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: %s: %d", msg, (int) err);
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}
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pos = s;
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while (*pos) {
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if (*pos == '\n' || *pos == '\r') {
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*pos = '\0';
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break;
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}
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pos++;
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}
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wpa_printf(MSG_DEBUG, "CryptoAPI: %s: %d: (%s)", msg, (int) err, s);
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LocalFree(s);
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}
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int cryptoapi_hash_vector(ALG_ID alg, size_t hash_len, size_t num_elem,
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const u8 *addr[], const size_t *len, u8 *mac)
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{
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HCRYPTPROV prov;
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HCRYPTHASH hash;
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size_t i;
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DWORD hlen;
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int ret = 0;
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if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, 0)) {
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cryptoapi_report_error("CryptAcquireContext");
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return -1;
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}
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if (!CryptCreateHash(prov, alg, 0, 0, &hash)) {
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cryptoapi_report_error("CryptCreateHash");
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CryptReleaseContext(prov, 0);
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return -1;
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}
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for (i = 0; i < num_elem; i++) {
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if (!CryptHashData(hash, (BYTE *) addr[i], len[i], 0)) {
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cryptoapi_report_error("CryptHashData");
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CryptDestroyHash(hash);
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CryptReleaseContext(prov, 0);
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}
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}
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hlen = hash_len;
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if (!CryptGetHashParam(hash, HP_HASHVAL, mac, &hlen, 0)) {
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cryptoapi_report_error("CryptGetHashParam");
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ret = -1;
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}
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CryptDestroyHash(hash);
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CryptReleaseContext(prov, 0);
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return ret;
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}
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int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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return cryptoapi_hash_vector(CALG_MD4, 16, num_elem, addr, len, mac);
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}
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void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
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{
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u8 next, tmp;
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int i;
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HCRYPTPROV prov;
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HCRYPTKEY ckey;
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DWORD dlen;
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struct {
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BLOBHEADER hdr;
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DWORD len;
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BYTE key[8];
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} key_blob;
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DWORD mode = CRYPT_MODE_ECB;
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key_blob.hdr.bType = PLAINTEXTKEYBLOB;
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key_blob.hdr.bVersion = CUR_BLOB_VERSION;
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key_blob.hdr.reserved = 0;
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key_blob.hdr.aiKeyAlg = CALG_DES;
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key_blob.len = 8;
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/* Add parity bits to the key */
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next = 0;
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for (i = 0; i < 7; i++) {
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tmp = key[i];
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key_blob.key[i] = (tmp >> i) | next | 1;
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next = tmp << (7 - i);
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}
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key_blob.key[i] = next | 1;
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if (!CryptAcquireContext(&prov, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL,
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CRYPT_VERIFYCONTEXT)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptAcquireContext failed: "
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"%d", (int) GetLastError());
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return;
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}
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if (!CryptImportKey(prov, (BYTE *) &key_blob, sizeof(key_blob), 0, 0,
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&ckey)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptImportKey failed: %d",
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(int) GetLastError());
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CryptReleaseContext(prov, 0);
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return;
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}
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if (!CryptSetKeyParam(ckey, KP_MODE, (BYTE *) &mode, 0)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptSetKeyParam(KP_MODE) "
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"failed: %d", (int) GetLastError());
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CryptDestroyKey(ckey);
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CryptReleaseContext(prov, 0);
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return;
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}
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os_memcpy(cypher, clear, 8);
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dlen = 8;
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if (!CryptEncrypt(ckey, 0, FALSE, 0, cypher, &dlen, 8)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptEncrypt failed: %d",
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(int) GetLastError());
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os_memset(cypher, 0, 8);
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}
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CryptDestroyKey(ckey);
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CryptReleaseContext(prov, 0);
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}
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int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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return cryptoapi_hash_vector(CALG_MD5, 16, num_elem, addr, len, mac);
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}
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int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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return cryptoapi_hash_vector(CALG_SHA, 20, num_elem, addr, len, mac);
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}
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struct aes_context {
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HCRYPTPROV prov;
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HCRYPTKEY ckey;
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};
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void * aes_encrypt_init(const u8 *key, size_t len)
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{
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struct aes_context *akey;
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struct {
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BLOBHEADER hdr;
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DWORD len;
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BYTE key[16];
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} key_blob;
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DWORD mode = CRYPT_MODE_ECB;
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if (len != 16)
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return NULL;
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key_blob.hdr.bType = PLAINTEXTKEYBLOB;
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key_blob.hdr.bVersion = CUR_BLOB_VERSION;
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key_blob.hdr.reserved = 0;
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key_blob.hdr.aiKeyAlg = CALG_AES_128;
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key_blob.len = len;
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os_memcpy(key_blob.key, key, len);
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akey = os_zalloc(sizeof(*akey));
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if (akey == NULL)
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return NULL;
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if (!CryptAcquireContext(&akey->prov, NULL,
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MS_ENH_RSA_AES_PROV, PROV_RSA_AES,
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CRYPT_VERIFYCONTEXT)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptAcquireContext failed: "
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"%d", (int) GetLastError());
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os_free(akey);
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return NULL;
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}
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if (!CryptImportKey(akey->prov, (BYTE *) &key_blob, sizeof(key_blob),
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0, 0, &akey->ckey)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptImportKey failed: %d",
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(int) GetLastError());
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CryptReleaseContext(akey->prov, 0);
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os_free(akey);
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return NULL;
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}
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if (!CryptSetKeyParam(akey->ckey, KP_MODE, (BYTE *) &mode, 0)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptSetKeyParam(KP_MODE) "
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"failed: %d", (int) GetLastError());
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CryptDestroyKey(akey->ckey);
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CryptReleaseContext(akey->prov, 0);
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os_free(akey);
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return NULL;
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}
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return akey;
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}
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void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
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{
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struct aes_context *akey = ctx;
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DWORD dlen;
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os_memcpy(crypt, plain, 16);
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dlen = 16;
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if (!CryptEncrypt(akey->ckey, 0, FALSE, 0, crypt, &dlen, 16)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptEncrypt failed: %d",
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(int) GetLastError());
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os_memset(crypt, 0, 16);
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}
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}
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void aes_encrypt_deinit(void *ctx)
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{
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struct aes_context *akey = ctx;
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if (akey) {
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CryptDestroyKey(akey->ckey);
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CryptReleaseContext(akey->prov, 0);
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os_free(akey);
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}
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}
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void * aes_decrypt_init(const u8 *key, size_t len)
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{
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return aes_encrypt_init(key, len);
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}
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void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
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{
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struct aes_context *akey = ctx;
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DWORD dlen;
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os_memcpy(plain, crypt, 16);
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dlen = 16;
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if (!CryptDecrypt(akey->ckey, 0, FALSE, 0, plain, &dlen)) {
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wpa_printf(MSG_DEBUG, "CryptoAPI: CryptDecrypt failed: %d",
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(int) GetLastError());
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}
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}
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void aes_decrypt_deinit(void *ctx)
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{
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aes_encrypt_deinit(ctx);
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}
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struct crypto_hash {
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enum crypto_hash_alg alg;
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int error;
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HCRYPTPROV prov;
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HCRYPTHASH hash;
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HCRYPTKEY key;
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};
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struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
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size_t key_len)
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{
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struct crypto_hash *ctx;
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ALG_ID calg;
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struct {
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BLOBHEADER hdr;
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DWORD len;
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BYTE key[32];
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} key_blob;
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os_memset(&key_blob, 0, sizeof(key_blob));
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switch (alg) {
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case CRYPTO_HASH_ALG_MD5:
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calg = CALG_MD5;
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break;
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case CRYPTO_HASH_ALG_SHA1:
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calg = CALG_SHA;
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break;
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case CRYPTO_HASH_ALG_HMAC_MD5:
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case CRYPTO_HASH_ALG_HMAC_SHA1:
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calg = CALG_HMAC;
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key_blob.hdr.bType = PLAINTEXTKEYBLOB;
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key_blob.hdr.bVersion = CUR_BLOB_VERSION;
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key_blob.hdr.reserved = 0;
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/*
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* Note: RC2 is not really used, but that can be used to
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* import HMAC keys of up to 16 byte long.
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* CRYPT_IPSEC_HMAC_KEY flag for CryptImportKey() is needed to
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* be able to import longer keys (HMAC-SHA1 uses 20-byte key).
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*/
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key_blob.hdr.aiKeyAlg = CALG_RC2;
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key_blob.len = key_len;
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if (key_len > sizeof(key_blob.key))
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return NULL;
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os_memcpy(key_blob.key, key, key_len);
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break;
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default:
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return NULL;
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}
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ctx = os_zalloc(sizeof(*ctx));
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if (ctx == NULL)
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return NULL;
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ctx->alg = alg;
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if (!CryptAcquireContext(&ctx->prov, NULL, NULL, PROV_RSA_FULL, 0)) {
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cryptoapi_report_error("CryptAcquireContext");
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os_free(ctx);
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return NULL;
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}
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if (calg == CALG_HMAC) {
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#ifndef CRYPT_IPSEC_HMAC_KEY
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#define CRYPT_IPSEC_HMAC_KEY 0x00000100
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#endif
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if (!CryptImportKey(ctx->prov, (BYTE *) &key_blob,
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sizeof(key_blob), 0, CRYPT_IPSEC_HMAC_KEY,
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&ctx->key)) {
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cryptoapi_report_error("CryptImportKey");
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CryptReleaseContext(ctx->prov, 0);
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os_free(ctx);
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return NULL;
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}
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}
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if (!CryptCreateHash(ctx->prov, calg, ctx->key, 0, &ctx->hash)) {
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cryptoapi_report_error("CryptCreateHash");
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CryptReleaseContext(ctx->prov, 0);
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os_free(ctx);
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return NULL;
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}
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if (calg == CALG_HMAC) {
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HMAC_INFO info;
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os_memset(&info, 0, sizeof(info));
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switch (alg) {
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case CRYPTO_HASH_ALG_HMAC_MD5:
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info.HashAlgid = CALG_MD5;
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break;
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case CRYPTO_HASH_ALG_HMAC_SHA1:
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info.HashAlgid = CALG_SHA;
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break;
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default:
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/* unreachable */
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break;
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}
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if (!CryptSetHashParam(ctx->hash, HP_HMAC_INFO, (BYTE *) &info,
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0)) {
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cryptoapi_report_error("CryptSetHashParam");
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CryptDestroyHash(ctx->hash);
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CryptReleaseContext(ctx->prov, 0);
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os_free(ctx);
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return NULL;
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}
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}
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return ctx;
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}
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void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len)
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{
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if (ctx == NULL || ctx->error)
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return;
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if (!CryptHashData(ctx->hash, (BYTE *) data, len, 0)) {
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cryptoapi_report_error("CryptHashData");
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ctx->error = 1;
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}
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}
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int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
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{
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int ret = 0;
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DWORD hlen;
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if (ctx == NULL)
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return -2;
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if (mac == NULL || len == NULL)
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goto done;
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if (ctx->error) {
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ret = -2;
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goto done;
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}
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hlen = *len;
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if (!CryptGetHashParam(ctx->hash, HP_HASHVAL, mac, &hlen, 0)) {
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cryptoapi_report_error("CryptGetHashParam");
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ret = -2;
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}
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*len = hlen;
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done:
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if (ctx->alg == CRYPTO_HASH_ALG_HMAC_SHA1 ||
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ctx->alg == CRYPTO_HASH_ALG_HMAC_MD5)
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CryptDestroyKey(ctx->key);
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os_free(ctx);
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return ret;
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}
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struct crypto_cipher {
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HCRYPTPROV prov;
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HCRYPTKEY key;
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};
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struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
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const u8 *iv, const u8 *key,
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size_t key_len)
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{
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struct crypto_cipher *ctx;
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struct {
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BLOBHEADER hdr;
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DWORD len;
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BYTE key[32];
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} key_blob;
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DWORD mode = CRYPT_MODE_CBC;
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key_blob.hdr.bType = PLAINTEXTKEYBLOB;
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key_blob.hdr.bVersion = CUR_BLOB_VERSION;
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key_blob.hdr.reserved = 0;
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key_blob.len = key_len;
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if (key_len > sizeof(key_blob.key))
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return NULL;
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os_memcpy(key_blob.key, key, key_len);
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switch (alg) {
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case CRYPTO_CIPHER_ALG_AES:
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if (key_len == 32)
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key_blob.hdr.aiKeyAlg = CALG_AES_256;
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else if (key_len == 24)
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key_blob.hdr.aiKeyAlg = CALG_AES_192;
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else
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key_blob.hdr.aiKeyAlg = CALG_AES_128;
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break;
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case CRYPTO_CIPHER_ALG_3DES:
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key_blob.hdr.aiKeyAlg = CALG_3DES;
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break;
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case CRYPTO_CIPHER_ALG_DES:
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key_blob.hdr.aiKeyAlg = CALG_DES;
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break;
|
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case CRYPTO_CIPHER_ALG_RC2:
|
|
key_blob.hdr.aiKeyAlg = CALG_RC2;
|
|
break;
|
|
case CRYPTO_CIPHER_ALG_RC4:
|
|
key_blob.hdr.aiKeyAlg = CALG_RC4;
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
ctx = os_zalloc(sizeof(*ctx));
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
if (!CryptAcquireContext(&ctx->prov, NULL, MS_ENH_RSA_AES_PROV,
|
|
PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) {
|
|
cryptoapi_report_error("CryptAcquireContext");
|
|
goto fail1;
|
|
}
|
|
|
|
if (!CryptImportKey(ctx->prov, (BYTE *) &key_blob,
|
|
sizeof(key_blob), 0, 0, &ctx->key)) {
|
|
cryptoapi_report_error("CryptImportKey");
|
|
goto fail2;
|
|
}
|
|
|
|
if (!CryptSetKeyParam(ctx->key, KP_MODE, (BYTE *) &mode, 0)) {
|
|
cryptoapi_report_error("CryptSetKeyParam(KP_MODE)");
|
|
goto fail3;
|
|
}
|
|
|
|
if (iv && !CryptSetKeyParam(ctx->key, KP_IV, (BYTE *) iv, 0)) {
|
|
cryptoapi_report_error("CryptSetKeyParam(KP_IV)");
|
|
goto fail3;
|
|
}
|
|
|
|
return ctx;
|
|
|
|
fail3:
|
|
CryptDestroyKey(ctx->key);
|
|
fail2:
|
|
CryptReleaseContext(ctx->prov, 0);
|
|
fail1:
|
|
os_free(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
|
|
u8 *crypt, size_t len)
|
|
{
|
|
DWORD dlen;
|
|
|
|
os_memcpy(crypt, plain, len);
|
|
dlen = len;
|
|
if (!CryptEncrypt(ctx->key, 0, FALSE, 0, crypt, &dlen, len)) {
|
|
cryptoapi_report_error("CryptEncrypt");
|
|
os_memset(crypt, 0, len);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
|
|
u8 *plain, size_t len)
|
|
{
|
|
DWORD dlen;
|
|
|
|
os_memcpy(plain, crypt, len);
|
|
dlen = len;
|
|
if (!CryptDecrypt(ctx->key, 0, FALSE, 0, plain, &dlen)) {
|
|
cryptoapi_report_error("CryptDecrypt");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void crypto_cipher_deinit(struct crypto_cipher *ctx)
|
|
{
|
|
CryptDestroyKey(ctx->key);
|
|
CryptReleaseContext(ctx->prov, 0);
|
|
os_free(ctx);
|
|
}
|
|
|
|
|
|
struct crypto_public_key {
|
|
HCRYPTPROV prov;
|
|
HCRYPTKEY rsa;
|
|
};
|
|
|
|
struct crypto_private_key {
|
|
HCRYPTPROV prov;
|
|
HCRYPTKEY rsa;
|
|
};
|
|
|
|
|
|
struct crypto_public_key * crypto_public_key_import(const u8 *key, size_t len)
|
|
{
|
|
/* Use crypto_public_key_from_cert() instead. */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
struct crypto_private_key * crypto_private_key_import(const u8 *key,
|
|
size_t len,
|
|
const char *passwd)
|
|
{
|
|
/* TODO */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
struct crypto_public_key * crypto_public_key_from_cert(const u8 *buf,
|
|
size_t len)
|
|
{
|
|
struct crypto_public_key *pk;
|
|
PCCERT_CONTEXT cc;
|
|
|
|
pk = os_zalloc(sizeof(*pk));
|
|
if (pk == NULL)
|
|
return NULL;
|
|
|
|
cc = CertCreateCertificateContext(X509_ASN_ENCODING |
|
|
PKCS_7_ASN_ENCODING, buf, len);
|
|
if (!cc) {
|
|
cryptoapi_report_error("CryptCreateCertificateContext");
|
|
os_free(pk);
|
|
return NULL;
|
|
}
|
|
|
|
if (!CryptAcquireContext(&pk->prov, NULL, MS_DEF_PROV, PROV_RSA_FULL,
|
|
0)) {
|
|
cryptoapi_report_error("CryptAcquireContext");
|
|
os_free(pk);
|
|
CertFreeCertificateContext(cc);
|
|
return NULL;
|
|
}
|
|
|
|
if (!CryptImportPublicKeyInfo(pk->prov, X509_ASN_ENCODING |
|
|
PKCS_7_ASN_ENCODING,
|
|
&cc->pCertInfo->SubjectPublicKeyInfo,
|
|
&pk->rsa)) {
|
|
cryptoapi_report_error("CryptImportPublicKeyInfo");
|
|
CryptReleaseContext(pk->prov, 0);
|
|
os_free(pk);
|
|
CertFreeCertificateContext(cc);
|
|
return NULL;
|
|
}
|
|
|
|
CertFreeCertificateContext(cc);
|
|
|
|
return pk;
|
|
}
|
|
|
|
|
|
int crypto_public_key_encrypt_pkcs1_v15(struct crypto_public_key *key,
|
|
const u8 *in, size_t inlen,
|
|
u8 *out, size_t *outlen)
|
|
{
|
|
DWORD clen;
|
|
u8 *tmp;
|
|
size_t i;
|
|
|
|
if (*outlen < inlen)
|
|
return -1;
|
|
tmp = malloc(*outlen);
|
|
if (tmp == NULL)
|
|
return -1;
|
|
|
|
os_memcpy(tmp, in, inlen);
|
|
clen = inlen;
|
|
if (!CryptEncrypt(key->rsa, 0, TRUE, 0, tmp, &clen, *outlen)) {
|
|
wpa_printf(MSG_DEBUG, "CryptoAPI: Failed to encrypt using "
|
|
"public key: %d", (int) GetLastError());
|
|
os_free(tmp);
|
|
return -1;
|
|
}
|
|
|
|
*outlen = clen;
|
|
|
|
/* Reverse the output */
|
|
for (i = 0; i < *outlen; i++)
|
|
out[i] = tmp[*outlen - 1 - i];
|
|
|
|
os_free(tmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int crypto_private_key_sign_pkcs1(struct crypto_private_key *key,
|
|
const u8 *in, size_t inlen,
|
|
u8 *out, size_t *outlen)
|
|
{
|
|
/* TODO */
|
|
return -1;
|
|
}
|
|
|
|
|
|
void crypto_public_key_free(struct crypto_public_key *key)
|
|
{
|
|
if (key) {
|
|
CryptDestroyKey(key->rsa);
|
|
CryptReleaseContext(key->prov, 0);
|
|
os_free(key);
|
|
}
|
|
}
|
|
|
|
|
|
void crypto_private_key_free(struct crypto_private_key *key)
|
|
{
|
|
if (key) {
|
|
CryptDestroyKey(key->rsa);
|
|
CryptReleaseContext(key->prov, 0);
|
|
os_free(key);
|
|
}
|
|
}
|
|
|
|
|
|
int crypto_global_init(void)
|
|
{
|
|
return mingw_load_crypto_func();
|
|
}
|
|
|
|
|
|
void crypto_global_deinit(void)
|
|
{
|
|
}
|
|
|
|
|
|
int crypto_mod_exp(const u8 *base, size_t base_len,
|
|
const u8 *power, size_t power_len,
|
|
const u8 *modulus, size_t modulus_len,
|
|
u8 *result, size_t *result_len)
|
|
{
|
|
/* TODO */
|
|
return -1;
|
|
}
|