NULL is a valid cspname
[openssl.git] / engines / e_capi.c
index 95c6aecbb12a7a755a2d4bfdf04b5bda3a395eb9..ce1bec906a68218095993c1ff58d27843514672b 100644 (file)
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
+
 #include <openssl/crypto.h>
-#include <openssl/buffer.h>
-#include <openssl/rsa.h>
-#include <openssl/bn.h>
 
 #ifdef OPENSSL_SYS_WIN32
 #ifndef OPENSSL_NO_CAPIENG
 
+#include <openssl/buffer.h>
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0400
+#endif
+
 #include <windows.h>
 #include <wincrypt.h>
+#include <malloc.h>
+#ifndef alloca
+# define alloca _alloca
+#endif
+
+/*
+ * This module uses several "new" interfaces, among which is
+ * CertGetCertificateContextProperty. CERT_KEY_PROV_INFO_PROP_ID is
+ * one of possible values you can pass to function in question. By
+ * checking if it's defined we can see if wincrypt.h and accompanying
+ * crypt32.lib are in shape. The native MingW32 headers up to and
+ * including __W32API_VERSION 3.14 lack of struct DSSPUBKEY and the
+ * defines CERT_STORE_PROV_SYSTEM_A and CERT_STORE_READONLY_FLAG,
+ * so we check for these too and avoid compiling.
+ * Yes, it's rather "weak" test and if compilation fails,
+ * then re-configure with -DOPENSSL_NO_CAPIENG.
+ */
+#if defined(CERT_KEY_PROV_INFO_PROP_ID) && \
+    defined(CERT_STORE_PROV_SYSTEM_A) && \
+    defined(CERT_STORE_READONLY_FLAG)
+# define __COMPILE_CAPIENG
+#endif /* CERT_KEY_PROV_INFO_PROP_ID */
+#endif /* OPENSSL_NO_CAPIENG */
+#endif /* OPENSSL_SYS_WIN32 */
+
+#ifdef __COMPILE_CAPIENG
 
 #undef X509_EXTENSIONS
 #undef X509_CERT_PAIR
 
+/* Definitions which may be missing from earlier version of headers */
+#ifndef CERT_STORE_OPEN_EXISTING_FLAG
+#define CERT_STORE_OPEN_EXISTING_FLAG                   0x00004000
+#endif
+
+#ifndef CERT_STORE_CREATE_NEW_FLAG
+#define CERT_STORE_CREATE_NEW_FLAG                      0x00002000
+#endif
+
+#ifndef CERT_SYSTEM_STORE_CURRENT_USER
+#define CERT_SYSTEM_STORE_CURRENT_USER                 0x00010000
+#endif 
+
 #include <openssl/engine.h>
 #include <openssl/pem.h>
+#include <openssl/x509v3.h>
 
 #include "e_capi_err.h"
 #include "e_capi_err.c"
@@ -136,19 +183,21 @@ struct CAPI_CTX_st {
        char *debug_file;
        /* Parameters to use for container lookup */
        DWORD keytype;
-       LPTSTR cspname;
+       LPSTR cspname;
        DWORD csptype;
        /* Certificate store name to use */
-       LPTSTR storename;
-       LPTSTR ssl_client_store;
+       LPSTR storename;
+       LPSTR ssl_client_store;
+       /* System store flags */
+       DWORD store_flags;
 
 /* Lookup string meanings in load_private_key */
 /* Substring of subject: uses "storename" */
-#define CAPI_LU_SUBSTR         0
+#define CAPI_LU_SUBSTR         1
 /* Friendly name: uses storename */
-#define CAPI_LU_FNAME          1
+#define CAPI_LU_FNAME          2
 /* Container name: uses cspname, keytype */
-#define CAPI_LU_CONTNAME       2
+#define CAPI_LU_CONTNAME       3
        int lookup_method;
 /* Info to dump with dumpcerts option */
 /* Issuer and serial name strings */
@@ -190,6 +239,7 @@ static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
 #define CAPI_CMD_LIST_OPTIONS          (ENGINE_CMD_BASE + 10)
 #define CAPI_CMD_LOOKUP_METHOD         (ENGINE_CMD_BASE + 11)
 #define CAPI_CMD_STORE_NAME            (ENGINE_CMD_BASE + 12)
+#define CAPI_CMD_STORE_FLAGS           (ENGINE_CMD_BASE + 13)
 
 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
        {CAPI_CMD_LIST_CERTS,
@@ -245,6 +295,10 @@ static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
                "store_name",
                "certificate store name, default \"MY\"",
                ENGINE_CMD_FLAG_STRING},
+       {CAPI_CMD_STORE_FLAGS,
+               "store_flags",
+               "Certificate store flags: 1 = system store",
+               ENGINE_CMD_FLAG_NUMERIC},
 
        {0, NULL, NULL, 0}
        };
@@ -291,6 +345,20 @@ static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
                CAPI_trace(ctx, "Setting store name to %s\n", p);
                break;
 
+               case CAPI_CMD_STORE_FLAGS:
+               if (i & 1)
+                       {
+                       ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
+                       ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
+                       }
+               else
+                       {
+                       ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
+                       ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
+                       }
+               CAPI_trace(ctx, "Setting flags to %d\n", i);
+               break;
+
                case CAPI_CMD_DEBUG_LEVEL:
                ctx->debug_level = (int)i;
                CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
@@ -405,13 +473,12 @@ static int capi_init(ENGINE *e)
 #ifdef OPENSSL_CAPIENG_DIALOG
        {
        HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
-       HMODULE kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
+       HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
        if (cryptui)
                ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
        if (kernel)
                ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
-       if (cryptui)
-//     if (cryptui && !OPENSSL_isservice())
+       if (cryptui && !OPENSSL_isservice())
                ctx->client_cert_select = cert_select_dialog;
        }
 #endif
@@ -680,7 +747,7 @@ static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
        return ret;
 
 memerr:
-       CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
+       CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
        goto err;
 
        }
@@ -997,25 +1064,39 @@ static void capi_adderror(DWORD err)
        ERR_add_error_data(2, "Error code= 0x", errstr);
        }
 
-static char *wide_to_asc(LPWSTR wstr)
+static char *wide_to_asc(LPCWSTR wstr)
        {
        char *str;
+       int len_0,sz;
+
        if (!wstr)
                return NULL;
-       str = OPENSSL_malloc(wcslen(wstr) + 1);
+       len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
+        sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
+       if (!sz)
+               {
+               CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
+               return NULL;
+               }
+       str = OPENSSL_malloc(sz);
        if (!str)
                {
                CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
                return NULL;
                }
-       sprintf(str, "%S", wstr);
+       if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
+               {
+               OPENSSL_free(str);
+               CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
+               return NULL;
+               }
        return str;
        }
 
 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
        {
-       LPSTR name;
        DWORD len, err;
+       LPTSTR name;
        CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
        if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len))
                {
@@ -1026,8 +1107,11 @@ static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD id
                capi_adderror(err);
                return 0;
                }
-       name = OPENSSL_malloc(len);
-               if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
+       if (sizeof(TCHAR) != sizeof(char))
+               name = alloca(len);
+       else
+               name = OPENSSL_malloc(len);
+       if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
                {
                err = GetLastError();
                if (err == ERROR_NO_MORE_ITEMS)
@@ -1036,8 +1120,11 @@ static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD id
                capi_adderror(err);
                return 0;
                }
-       *pname = name;
-       CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
+       if (sizeof(TCHAR) != sizeof(char))
+               *pname = wide_to_asc((WCHAR *)name);
+       else
+               *pname = (char *)name;
+       CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", *pname, *ptype);
 
        return 1;
        }
@@ -1046,7 +1133,7 @@ static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
        {
        DWORD idx, ptype;
        int ret;
-       LPTSTR provname = NULL;
+       LPSTR provname = NULL;
        CAPI_trace(ctx, "capi_list_providers\n");
        BIO_printf(out, "Available CSPs:\n");
        for(idx = 0; ; idx++)
@@ -1068,8 +1155,26 @@ static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
        HCRYPTPROV hprov;
        DWORD err, idx, flags, buflen = 0, clen;
        LPSTR cname;
+       LPTSTR cspname = NULL;
+
        CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
-       if (!CryptAcquireContext(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
+       if (ctx->cspname && sizeof(TCHAR)!=sizeof(char))
+               {
+               if ((clen=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)))
+                       {
+                       cspname = alloca(clen*sizeof(WCHAR));
+                       MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,(WCHAR *)cspname,clen);
+                       }
+               if (!cspname)
+                       {
+                       CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
+                       capi_addlasterror();
+                       return 0;
+                       }
+               }
+       else
+               cspname = (TCHAR *)ctx->cspname;
+       if (!CryptAcquireContext(&hprov, NULL, cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
                {
                CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
                capi_addlasterror();
@@ -1100,7 +1205,7 @@ static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
                        flags = CRYPT_FIRST;
                else
                        flags = 0;
-               if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
+               if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, (BYTE *)cname, &clen, flags))
                        {
                        err = GetLastError();
                        if (err == ERROR_NO_MORE_ITEMS)
@@ -1255,7 +1360,8 @@ HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
                storename = "MY";
        CAPI_trace(ctx, "Opening certificate store %s\n", storename);
 
-       hstore = CertOpenSystemStore(0, storename);
+       hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0, 
+                               ctx->store_flags, storename);
        if (!hstore)
                {
                CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
@@ -1295,7 +1401,6 @@ int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
                {
                for(idx = 0;;idx++)
                        {
-                       LPWSTR fname = NULL;
                        cert = CertEnumCertificatesInStore(hstore, cert);
                        if (!cert)
                                break;
@@ -1342,12 +1447,24 @@ static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE h
                }
        }
 
-static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
+static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const TCHAR *contname, TCHAR *provname, DWORD ptype, DWORD keyspec)
        {
        CAPI_KEY *key;
        key = OPENSSL_malloc(sizeof(CAPI_KEY));
-       CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n", 
+       if (sizeof(TCHAR)==sizeof(char))
+               CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
                                                contname, provname, ptype);
+       else if (ctx && ctx->debug_level>=CAPI_DBG_TRACE && ctx->debug_file)
+               {
+               /* above 'if' is optimization to minimize malloc-ations */
+               char *_contname = wide_to_asc((WCHAR *)contname);
+               char *_provname = wide_to_asc((WCHAR *)provname);
+
+               CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n", 
+                                               _contname, _provname, ptype);
+               if (_provname) OPENSSL_free(_provname);
+               if (_contname) OPENSSL_free(_contname);
+               }
        if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, 0))
                {
                CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
@@ -1372,19 +1489,25 @@ static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provnam
 
 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
        {
-       CAPI_KEY *key;
+       CAPI_KEY *key = NULL;
        CRYPT_KEY_PROV_INFO *pinfo = NULL;
        char *provname = NULL, *contname = NULL;
        pinfo = capi_get_prov_info(ctx, cert);
        if (!pinfo)
                goto err;
-       provname = wide_to_asc(pinfo->pwszProvName);
-       contname = wide_to_asc(pinfo->pwszContainerName);
-       if (!provname || !contname)
-               return 0;
-
-       key = capi_get_key(ctx, contname, provname,
+       if (sizeof(TCHAR) != sizeof(char))
+               key = capi_get_key(ctx, (TCHAR *)pinfo->pwszContainerName,
+                               (TCHAR *)pinfo->pwszProvName,
+                               pinfo->dwProvType, pinfo->dwKeySpec);
+       else
+               {
+               provname = wide_to_asc(pinfo->pwszProvName);
+               contname = wide_to_asc(pinfo->pwszContainerName);
+               if (!provname || !contname)
+                       goto err;
+               key = capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
                                pinfo->dwProvType, pinfo->dwKeySpec);
+               }
 
        err:
        if (pinfo)
@@ -1418,8 +1541,25 @@ CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
                break;
 
                case CAPI_LU_CONTNAME:
-               key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
-                                                       ctx->keytype);
+               if (sizeof(TCHAR)!=sizeof(char))
+                       {
+                       WCHAR *contname, *provname;
+                       DWORD len;
+
+                       if ((len=MultiByteToWideChar(CP_ACP,0,id,-1,NULL,0)) &&
+                           (contname=alloca(len*sizeof(WCHAR)),
+                            MultiByteToWideChar(CP_ACP,0,id,-1,contname,len)) &&
+                           (len=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)) &&
+                           (provname=alloca(len*sizeof(WCHAR)),
+                            MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,provname,len)))
+                               key = capi_get_key(ctx,(TCHAR *)contname,
+                                               (TCHAR *)provname,
+                                               ctx->csptype,ctx->keytype);
+                       }
+               else
+                       key = capi_get_key(ctx, (TCHAR *)id,
+                                               (TCHAR *)ctx->cspname,
+                                               ctx->csptype,ctx->keytype);
                break;
                }
 
@@ -1455,6 +1595,9 @@ static CAPI_CTX *capi_ctx_new()
        ctx->keytype = AT_KEYEXCHANGE;
        ctx->storename = NULL;
        ctx->ssl_client_store = NULL;
+       ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
+                               CERT_STORE_READONLY_FLAG |
+                               CERT_SYSTEM_STORE_CURRENT_USER;
        ctx->lookup_method = CAPI_LU_SUBSTR;
        ctx->debug_level = 0;
        ctx->debug_file = NULL;
@@ -1484,7 +1627,21 @@ static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int che
        if (check)
                {
                HCRYPTPROV hprov;
-               if (!CryptAcquireContext(&hprov, NULL, pname, type,
+               LPTSTR name=NULL;
+
+               if (sizeof(TCHAR)!=sizeof(char))
+                       {
+                       DWORD len;
+                       if ((len=MultiByteToWideChar(CP_ACP,0,pname,-1,NULL,0)))
+                               {
+                               name = alloca(len*sizeof(WCHAR));
+                               MultiByteToWideChar(CP_ACP,0,pname,-1,(WCHAR *)name,len);
+                               }
+                       }
+               else
+                       name = (TCHAR *)pname;
+
+               if (!name || !CryptAcquireContext(&hprov, NULL, name, type,
                                                CRYPT_VERIFYCONTEXT))
                        {
                        CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
@@ -1563,11 +1720,15 @@ static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
                        CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
                        continue;
                        }
-               if (cert_issuer_match(ca_dn, x))
+               if (cert_issuer_match(ca_dn, x)
+                       && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
                        {
                        key = capi_get_cert_key(ctx, cert);
                        if (!key)
+                               {
+                               X509_free(x);
                                continue;
+                               }
                        /* Match found: attach extra data to it so
                         * we can retrieve the key later.
                         */
@@ -1642,8 +1803,14 @@ static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
  */
 
-#include <PrSht.h>
-#include <cryptuiapi.h>
+/* Definitions which are in cryptuiapi.h but this is not present in older
+ * versions of headers.
+ */
+
+#ifndef CRYPTUI_SELECT_LOCATION_COLUMN
+#define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
+#define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
+#endif
 
 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
 #define dlg_prompt L"Select a certificate to use for authentication"
@@ -1667,7 +1834,7 @@ static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
                                        CERT_STORE_CREATE_NEW_FLAG, NULL);
        if (!dstore)
                {
-               CAPIerr(CAPI_F_CLIENT_CERT_SELECT, CAPI_R_ERROR_CREATING_STORE);
+               CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
                capi_addlasterror();
                goto err;
                }
@@ -1680,13 +1847,15 @@ static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
                if (!CertAddCertificateContextToStore(dstore, key->pcert,
                                                CERT_STORE_ADD_NEW, NULL))
                        {
-                       CAPIerr(CAPI_F_CLIENT_CERT_SELECT, CAPI_R_ERROR_ADDING_CERT);
+                       CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
                        capi_addlasterror();
                        goto err;
                        }
 
                }
-       hwnd = GetActiveWindow();
+       hwnd = GetForegroundWindow();
+       if (!hwnd)
+               hwnd = GetActiveWindow();
        if (!hwnd && ctx->getconswindow)
                hwnd = ctx->getconswindow();
        /* Call dialog to select one */
@@ -1719,5 +1888,15 @@ static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
        }
 #endif
 
+#else /* !__COMPILE_CAPIENG */
+#include <openssl/engine.h>
+#ifndef OPENSSL_NO_DYNAMIC_ENGINE
+OPENSSL_EXPORT
+int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
+OPENSSL_EXPORT
+int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
+IMPLEMENT_DYNAMIC_CHECK_FN()
+#else
+void ENGINE_load_capi(void){}
 #endif
 #endif