+
+
+static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
+ STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
+ STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
+ {
+ STACK_OF(X509) *certs = NULL;
+ X509 *x;
+ char *storename;
+ const char *p;
+ int i, client_cert_idx;
+ HCERTSTORE hstore;
+ PCCERT_CONTEXT cert = NULL, excert = NULL;
+ CAPI_CTX *ctx;
+ CAPI_KEY *key;
+ ctx = ENGINE_get_ex_data(e, capi_idx);
+
+ *pcert = NULL;
+ *pkey = NULL;
+
+ storename = ctx->ssl_client_store;
+ if (!storename)
+ storename = "MY";
+
+ hstore = capi_open_store(ctx, storename);
+ if (!hstore)
+ return 0;
+ /* Enumerate all certificates collect any matches */
+ for(i = 0;;i++)
+ {
+ cert = CertEnumCertificatesInStore(hstore, cert);
+ if (!cert)
+ break;
+ p = cert->pbCertEncoded;
+ x = d2i_X509(NULL, &p, cert->cbCertEncoded);
+ if (!x)
+ {
+ CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
+ continue;
+ }
+ 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.
+ */
+ excert = CertDuplicateCertificateContext(cert);
+ key->pcert = excert;
+ X509_set_ex_data(x, cert_capi_idx, key);
+
+ if (!certs)
+ certs = sk_X509_new_null();
+
+ sk_X509_push(certs, x);
+ }
+ else
+ X509_free(x);
+
+ }
+
+ if (cert)
+ CertFreeCertificateContext(cert);
+ if (hstore)
+ CertCloseStore(hstore, 0);
+
+ if (!certs)
+ return 0;
+
+
+ /* Select the appropriate certificate */
+
+ client_cert_idx = ctx->client_cert_select(e, ssl, certs);
+
+ /* Set the selected certificate and free the rest */
+
+ for(i = 0; i < sk_X509_num(certs); i++)
+ {
+ x = sk_X509_value(certs, i);
+ if (i == client_cert_idx)
+ *pcert = x;
+ else
+ {
+ key = X509_get_ex_data(x, cert_capi_idx);
+ capi_free_key(key);
+ X509_free(x);
+ }
+ }
+
+ sk_X509_free(certs);
+
+ if (!*pcert)
+ return 0;
+
+ /* Setup key for selected certificate */
+
+ key = X509_get_ex_data(*pcert, cert_capi_idx);
+ *pkey = capi_get_pkey(e, key);
+ X509_set_ex_data(*pcert, cert_capi_idx, NULL);
+
+ return 1;
+
+ }
+
+
+/* Simple client cert selection function: always select first */
+
+static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
+ {
+ return 0;
+ }
+
+#ifdef OPENSSL_CAPIENG_DIALOG
+
+/* More complex cert selection function, using standard function
+ * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
+ */
+
+/* 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"
+#define dlg_columns CRYPTUI_SELECT_LOCATION_COLUMN \
+ |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
+
+static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
+ {
+ X509 *x;
+ HCERTSTORE dstore;
+ PCCERT_CONTEXT cert;
+ CAPI_CTX *ctx;
+ CAPI_KEY *key;
+ HWND hwnd;
+ int i, idx = -1;
+ if (sk_X509_num(certs) == 1)
+ return 0;
+ ctx = ENGINE_get_ex_data(e, capi_idx);
+ /* Create an in memory store of certificates */
+ dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
+ CERT_STORE_CREATE_NEW_FLAG, NULL);
+ if (!dstore)
+ {
+ CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
+ capi_addlasterror();
+ goto err;
+ }
+ /* Add all certificates to store */
+ for(i = 0; i < sk_X509_num(certs); i++)
+ {
+ x = sk_X509_value(certs, i);
+ key = X509_get_ex_data(x, cert_capi_idx);
+
+ if (!CertAddCertificateContextToStore(dstore, key->pcert,
+ CERT_STORE_ADD_NEW, NULL))
+ {
+ CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
+ capi_addlasterror();
+ goto err;
+ }
+
+ }
+ hwnd = GetForegroundWindow();
+ if (!hwnd)
+ hwnd = GetActiveWindow();
+ if (!hwnd && ctx->getconswindow)
+ hwnd = ctx->getconswindow();
+ /* Call dialog to select one */
+ cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
+ dlg_columns, 0, NULL);
+
+ /* Find matching cert from list */
+ if (cert)
+ {
+ for(i = 0; i < sk_X509_num(certs); i++)
+ {
+ x = sk_X509_value(certs, i);
+ key = X509_get_ex_data(x, cert_capi_idx);
+ if (CertCompareCertificate(
+ X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
+ cert->pCertInfo,
+ key->pcert->pCertInfo))
+ {
+ idx = i;
+ break;
+ }
+ }
+ }
+
+ err:
+ if (dstore)
+ CertCloseStore(dstore, 0);
+ return idx;
+
+ }
+#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){}