Don't require zlib in pkgconfig if it was found without it
[platform/upstream/openconnect.git] / openssl.c
index 544cf4c..851a711 100644 (file)
--- a/openssl.c
+++ b/openssl.c
@@ -257,6 +257,7 @@ static int ui_open(UI *ui)
        memset(ui_data, 0, sizeof(*ui_data));
        ui_data->last_opt = &ui_data->form.opts;
        ui_data->vpninfo = vpninfo;
+       ui_data->form.auth_id = (char *)"openssl_ui";
        UI_add_user_data(ui, ui_data);
 
        return 1;
@@ -389,8 +390,8 @@ static int pem_pw_cb(char *buf, int len, int w, void *v)
        if (vpninfo->cert_password) {
                pass = vpninfo->cert_password;
                vpninfo->cert_password = NULL;
-       } else if (request_passphrase(vpninfo, &pass,
-                                     _("Enter PEM pass phrase:")))
+       } else if (request_passphrase(vpninfo, "openconnect_pem",
+                                     &pass, _("Enter PEM pass phrase:")))
                return -1;
 
        plen = strlen(pass);
@@ -424,7 +425,7 @@ static int load_pkcs12_certificate(struct openconnect_info *vpninfo, PKCS12 *p12
           when PKCS12_parse() returns an error, but *ca is left pointing
           to the freed memory. */
        ca = NULL;
-       if (!pass && request_passphrase(vpninfo, &pass,
+       if (!pass && request_passphrase(vpninfo, "openconnect_pkcs12", &pass,
                                        _("Enter PKCS#12 pass phrase:")) < 0) {
                PKCS12_free(p12);
                return -EINVAL;
@@ -447,8 +448,10 @@ static int load_pkcs12_certificate(struct openconnect_info *vpninfo, PKCS12 *p12
                vpn_progress(vpninfo, PRG_ERR,
                             _("Parse PKCS#12 failed (see above errors)\n"));
                PKCS12_free(p12);
+               free(pass);
                return -EINVAL;
        }
+       free(pass);
        if (cert) {
                char buf[200];
                vpninfo->cert_x509 = cert;
@@ -508,6 +511,8 @@ static int load_tpm_certificate(struct openconnect_info *vpninfo)
        ENGINE *e;
        EVP_PKEY *key;
        UI_METHOD *meth = NULL;
+       int ret = 0;
+
        ENGINE_load_builtin_engines();
 
        e = ENGINE_by_id("tpm");
@@ -531,6 +536,8 @@ static int load_tpm_certificate(struct openconnect_info *vpninfo)
                                     _("Failed to set TPM SRK password\n"));
                        openconnect_report_ssl_errors(vpninfo);
                }
+               vpninfo->cert_password = NULL;
+               free(vpninfo->cert_password);
        } else {
                /* Provide our own UI method to handle the PIN callback. */
                meth = create_openssl_ui(vpninfo);
@@ -542,18 +549,19 @@ static int load_tpm_certificate(struct openconnect_info *vpninfo)
                vpn_progress(vpninfo, PRG_ERR,
                             _("Failed to load TPM private key\n"));
                openconnect_report_ssl_errors(vpninfo);
-               ENGINE_free(e);
-               ENGINE_finish(e);
-               return -EINVAL;
+               ret = -EINVAL;
+               goto out;
        }
        if (!SSL_CTX_use_PrivateKey(vpninfo->https_ctx, key)) {
                vpn_progress(vpninfo, PRG_ERR, _("Add key from TPM failed\n"));
                openconnect_report_ssl_errors(vpninfo);
-               ENGINE_free(e);
-               ENGINE_finish(e);
-               return -EINVAL;
+               ret = -EINVAL;
        }
-       return 0;
+       EVP_PKEY_free(key);
+ out:
+       ENGINE_finish(e);
+       ENGINE_free(e);
+       return ret;
 }
 #else
 static int load_tpm_certificate(struct openconnect_info *vpninfo)
@@ -581,6 +589,7 @@ static int reload_pem_cert(struct openconnect_info *vpninfo)
                return -EIO;
        }
        vpninfo->cert_x509 = PEM_read_bio_X509_AUX(b, NULL, NULL, NULL);
+       BIO_free(b);
        if (!vpninfo->cert_x509)
                goto err;
 
@@ -591,6 +600,65 @@ static int reload_pem_cert(struct openconnect_info *vpninfo)
        return 0;
 }
 
+#ifdef ANDROID_KEYSTORE
+static BIO *BIO_from_keystore(struct openconnect_info *vpninfo, const char *item)
+{
+       unsigned char *content;
+       BIO *b;
+       int len;
+       const char *p = item + 9;
+
+       /* Skip first two slashes if the user has given it as
+          keystore://foo ... */
+       if (*p == '/')
+               p++;
+       if (*p == '/')
+               p++;
+
+       len = keystore_fetch(p, &content);
+       if (len < 0) {
+               vpn_progress(vpninfo, PRG_ERR,
+                            _("Failed to load item '%s' from keystore: %s\n"),
+                            p, keystore_strerror(len));
+               return NULL;
+       }
+       if (!(b = BIO_new(BIO_s_mem())) || BIO_write(b, content, len) != len) {
+               vpn_progress(vpninfo, PRG_ERR,
+                            _("Failed to create BIO for keystore item '%s'\n"),
+                              p);
+               free(content);
+               BIO_free(b);
+               return NULL;
+       }
+       free(content);
+       return b;
+}
+#endif
+
+static int is_pem_password_error(struct openconnect_info *vpninfo)
+{
+       unsigned long err = ERR_peek_error();
+
+       openconnect_report_ssl_errors(vpninfo);
+
+#ifndef EVP_F_EVP_DECRYPTFINAL_EX
+#define EVP_F_EVP_DECRYPTFINAL_EX EVP_F_EVP_DECRYPTFINAL
+#endif
+       /* If the user fat-fingered the passphrase, try again */
+       if (ERR_GET_LIB(err) == ERR_LIB_EVP &&
+           ERR_GET_FUNC(err) == EVP_F_EVP_DECRYPTFINAL_EX &&
+           ERR_GET_REASON(err) == EVP_R_BAD_DECRYPT) {
+               vpn_progress(vpninfo, PRG_ERR,
+                            _("Loading private key failed (wrong passphrase?)\n"));
+               ERR_clear_error();
+               return 1;
+       }
+
+       vpn_progress(vpninfo, PRG_ERR,
+                    _("Loading private key failed (see above errors)\n"));
+       return 0;
+}
+
 static int load_certificate(struct openconnect_info *vpninfo)
 {
        if (!strncmp(vpninfo->sslkey, "pkcs11:", 7) ||
@@ -603,8 +671,9 @@ static int load_certificate(struct openconnect_info *vpninfo)
        vpn_progress(vpninfo, PRG_TRACE,
                     _("Using certificate file %s\n"), vpninfo->cert);
 
-       if (vpninfo->cert_type == CERT_TYPE_PKCS12 ||
-           vpninfo->cert_type == CERT_TYPE_UNKNOWN) {
+       if (strncmp(vpninfo->cert, "keystore:", 9) &&
+           (vpninfo->cert_type == CERT_TYPE_PKCS12 ||
+            vpninfo->cert_type == CERT_TYPE_UNKNOWN)) {
                FILE *f;
                PKCS12 *p12;
 
@@ -631,16 +700,69 @@ static int load_certificate(struct openconnect_info *vpninfo)
        }
 
        /* It's PEM or TPM now, and either way we need to load the plain cert: */
-       if (!SSL_CTX_use_certificate_chain_file(vpninfo->https_ctx,
-                                               vpninfo->cert)) {
-               vpn_progress(vpninfo, PRG_ERR,
-                            _("Loading certificate failed\n"));
-               openconnect_report_ssl_errors(vpninfo);
-               return -EINVAL;
+#ifdef ANDROID_KEYSTORE
+       if (!strncmp(vpninfo->cert, "keystore:", 9)) {
+               BIO *b = BIO_from_keystore(vpninfo, vpninfo->cert);
+               if (!b)
+                       return -EINVAL;
+               vpninfo->cert_x509 = PEM_read_bio_X509_AUX(b, NULL, pem_pw_cb, vpninfo);
+               BIO_free(b);
+               if (!vpninfo->cert_x509) {
+                       vpn_progress(vpninfo, PRG_ERR,
+                                    _("Failed to load X509 certificate from keystore\n"));
+                       openconnect_report_ssl_errors(vpninfo);
+                       return -EINVAL;
+               }
+               if (!SSL_CTX_use_certificate(vpninfo->https_ctx, vpninfo->cert_x509)) {
+                       vpn_progress(vpninfo, PRG_ERR,
+                                    _("Failed to use X509 certificate from keystore\n"));
+                       openconnect_report_ssl_errors(vpninfo);
+                       X509_free(vpninfo->cert_x509);
+                       vpninfo->cert_x509 = NULL;
+                       return -EINVAL;
+               }
+       } else
+#endif /* ANDROID_KEYSTORE */
+       {
+               if (!SSL_CTX_use_certificate_chain_file(vpninfo->https_ctx,
+                                                       vpninfo->cert)) {
+                       vpn_progress(vpninfo, PRG_ERR,
+                                    _("Loading certificate failed\n"));
+                       openconnect_report_ssl_errors(vpninfo);
+                       return -EINVAL;
+               }
+
+               /* Ew, we can't get it back from the OpenSSL CTX in any sane fashion */
+               reload_pem_cert(vpninfo);
        }
 
-       /* Ew, we can't get it back from the OpenSSL CTX in any sane fashion */
-       reload_pem_cert(vpninfo);
+#ifdef ANDROID_KEYSTORE
+       if (!strncmp(vpninfo->sslkey, "keystore:", 9)) {
+               EVP_PKEY *key;
+               BIO *b;
+
+       again_android:
+               b = BIO_from_keystore(vpninfo, vpninfo->sslkey);
+               if (!b)
+                       return -EINVAL;
+               key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb, vpninfo);
+               BIO_free(b);
+               if (!key) {
+                       if (is_pem_password_error(vpninfo))
+                               goto again_android;
+                       return -EINVAL;
+               }
+               if (!SSL_CTX_use_PrivateKey(vpninfo->https_ctx, key)) {
+                       vpn_progress(vpninfo, PRG_ERR,
+                                    _("Failed to use private key from keystore\n"));
+                       EVP_PKEY_free(key);
+                       X509_free(vpninfo->cert_x509);
+                       vpninfo->cert_x509 = NULL;
+                       return -EINVAL;
+               }
+               return 0;
+       }
+#endif /* ANDROID */
 
        if (vpninfo->cert_type == CERT_TYPE_UNKNOWN) {
                FILE *f = fopen(vpninfo->sslkey, "r");
@@ -683,24 +805,8 @@ static int load_certificate(struct openconnect_info *vpninfo)
  again:
        if (!SSL_CTX_use_RSAPrivateKey_file(vpninfo->https_ctx, vpninfo->sslkey,
                                            SSL_FILETYPE_PEM)) {
-               unsigned long err = ERR_peek_error();
-               
-               openconnect_report_ssl_errors(vpninfo);
-
-#ifndef EVP_F_EVP_DECRYPTFINAL_EX
-#define EVP_F_EVP_DECRYPTFINAL_EX EVP_F_EVP_DECRYPTFINAL
-#endif
-               /* If the user fat-fingered the passphrase, try again */
-               if (ERR_GET_LIB(err) == ERR_LIB_EVP &&
-                   ERR_GET_FUNC(err) == EVP_F_EVP_DECRYPTFINAL_EX &&
-                   ERR_GET_REASON(err) == EVP_R_BAD_DECRYPT) {
-                       vpn_progress(vpninfo, PRG_ERR,
-                                    _("Loading private key failed (wrong passphrase?)\n"));
+               if (is_pem_password_error(vpninfo))
                        goto again;
-               }
-               
-               vpn_progress(vpninfo, PRG_ERR,
-                            _("Loading private key failed (see above errors)\n"));
                return -EINVAL;
        }
        return 0;
@@ -1211,6 +1317,42 @@ int openconnect_open_https(struct openconnect_info *vpninfo)
 #endif
                SSL_CTX_set_default_verify_paths(vpninfo->https_ctx);
 
+#ifdef ANDROID_KEYSTORE
+               if (vpninfo->cafile && !strncmp(vpninfo->cafile, "keystore:", 9)) {
+                       STACK_OF(X509_INFO) *stack;
+                       X509_STORE *store;
+                       X509_INFO *info;
+                       BIO *b = BIO_from_keystore(vpninfo, vpninfo->cafile);
+
+                       if (!b) {
+                               close(ssl_sock);
+                               return -EINVAL;
+                       }
+
+                       stack = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
+                       BIO_free(b);
+
+                       if (!stack) {
+                               vpn_progress(vpninfo, PRG_ERR,
+                                            _("Failed to read certs from CA file '%s'\n"),
+                                            vpninfo->cafile);
+                               openconnect_report_ssl_errors(vpninfo);
+                               close(ssl_sock);
+                               return -ENOENT;
+                       }
+
+                       store = SSL_CTX_get_cert_store(vpninfo->https_ctx);
+
+                       while ((info = sk_X509_INFO_pop(stack))) {
+                               if (info->x509)
+                                       X509_STORE_add_cert(store, info->x509);
+                               if (info->crl)
+                                       X509_STORE_add_crl(store, info->crl);
+                               X509_INFO_free(info);
+                       }
+                       sk_X509_INFO_free(stack);
+               } else
+#endif
                if (vpninfo->cafile) {
                        if (!SSL_CTX_load_verify_locations(vpninfo->https_ctx, vpninfo->cafile, NULL)) {
                                vpn_progress(vpninfo, PRG_ERR,
@@ -1304,9 +1446,15 @@ void openconnect_close_https(struct openconnect_info *vpninfo, int final)
                FD_CLR(vpninfo->ssl_fd, &vpninfo->select_efds);
                vpninfo->ssl_fd = -1;
        }
-       if (final && vpninfo->https_ctx) {
-               SSL_CTX_free(vpninfo->https_ctx);
-               vpninfo->https_ctx = NULL;
+       if (final) {
+               if (vpninfo->https_ctx) {
+                       SSL_CTX_free(vpninfo->https_ctx);
+                       vpninfo->https_ctx = NULL;
+               }
+               if (vpninfo->cert_x509) {
+                       X509_free(vpninfo->cert_x509);
+                       vpninfo->cert_x509 = NULL;
+               }
        }
 }