From patchwork Mon May 25 11:16:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Alexey Krasikov X-Patchwork-Id: 1297277 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=yandex-team.ru Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yandex-team.ru header.i=@yandex-team.ru header.a=rsa-sha256 header.s=default header.b=OaLpdDNF; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49VvhN1J8pz9sRW for ; Mon, 25 May 2020 21:17:40 +1000 (AEST) Received: from localhost ([::1]:54914 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdB6v-00073j-SH for incoming@patchwork.ozlabs.org; Mon, 25 May 2020 07:17:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57238) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdB6X-00073b-5q for qemu-devel@nongnu.org; Mon, 25 May 2020 07:17:13 -0400 Received: from forwardcorp1p.mail.yandex.net ([2a02:6b8:0:1472:2741:0:8b6:217]:38618) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdB6V-00088s-1L for qemu-devel@nongnu.org; Mon, 25 May 2020 07:17:12 -0400 Received: from mxbackcorp1g.mail.yandex.net (mxbackcorp1g.mail.yandex.net [IPv6:2a02:6b8:0:1402::301]) by forwardcorp1p.mail.yandex.net (Yandex) with ESMTP id C89C62E151A; Mon, 25 May 2020 14:17:04 +0300 (MSK) Received: from vla5-58875c36c028.qloud-c.yandex.net (vla5-58875c36c028.qloud-c.yandex.net [2a02:6b8:c18:340b:0:640:5887:5c36]) by mxbackcorp1g.mail.yandex.net (mxbackcorp/Yandex) with ESMTP id HlWQaXGBQN-H420IYZR; Mon, 25 May 2020 14:17:04 +0300 Precedence: bulk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1590405424; bh=UMmwuoBRF6c1AIEX1ylQiKs5PllCqvaPIfMiDW/o6Lo=; h=In-Reply-To:Message-Id:References:Date:Subject:To:From:Cc; b=OaLpdDNFwpsS1LQZWGQNbD2Y5XJtG1DW+JINeNo1RP6DUQZGBIYFXmsZ6fOcSttzr GuAGYcoxU44f2bza6Ivcbf35IBpRRFG832kXHahsi0ptaD4fJN9tBzFB0nW9BPc8J9 JJ9+p21Oqv7J4og/XixiPtyE59GfrvECAEPg/5cM= Authentication-Results: mxbackcorp1g.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from dynamic-vpn.dhcp.yndx.net (dynamic-vpn.dhcp.yndx.net [2a02:6b8:b081:518::1:6]) by vla5-58875c36c028.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id Wf8DxNgJwQ-H4XeXdpd; Mon, 25 May 2020 14:17:04 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) From: Alexey Krasikov To: berrange@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v4 1/3] crypto/secret: move main logic from 'secret' to 'secret_common'. Date: Mon, 25 May 2020 14:16:53 +0300 Message-Id: <20200525111655.4127-2-alex-krasikov@yandex-team.ru> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200525111655.4127-1-alex-krasikov@yandex-team.ru> References: <20200525111655.4127-1-alex-krasikov@yandex-team.ru> Received-SPF: pass client-ip=2a02:6b8:0:1472:2741:0:8b6:217; envelope-from=alex-krasikov@yandex-team.ru; helo=forwardcorp1p.mail.yandex.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/25 07:17:05 X-ACL-Warn: Detected OS = ??? X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yc-core@yandex-team.ru Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Create base class 'common secret'. Move common data and logic from 'secret' to 'common_secret' class. This allowed adding abstraction layer for easier adding new 'secret' objects in future. Convert 'secret' class to child from basic 'secret_common' with 'data' and 'file' properties. Signed-off-by: Alexey Krasikov Reviewed-by: Daniel P. Berrangé --- crypto/Makefile.objs | 1 + crypto/secret.c | 347 +--------------------------- crypto/secret_common.c | 403 +++++++++++++++++++++++++++++++++ include/crypto/secret.h | 20 +- include/crypto/secret_common.h | 68 ++++++ 5 files changed, 482 insertions(+), 357 deletions(-) create mode 100644 crypto/secret_common.c create mode 100644 include/crypto/secret_common.h diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs index c2a371b0b4..695da72dd1 100644 --- a/crypto/Makefile.objs +++ b/crypto/Makefile.objs @@ -18,6 +18,7 @@ crypto-obj-y += tlscredsanon.o crypto-obj-y += tlscredspsk.o crypto-obj-y += tlscredsx509.o crypto-obj-y += tlssession.o +crypto-obj-y += secret_common.o crypto-obj-y += secret.o crypto-obj-y += pbkdf.o crypto-obj-$(CONFIG_NETTLE) += pbkdf-nettle.o diff --git a/crypto/secret.c b/crypto/secret.c index 3107aecb47..3447e2f64b 100644 --- a/crypto/secret.c +++ b/crypto/secret.c @@ -20,16 +20,14 @@ #include "qemu/osdep.h" #include "crypto/secret.h" -#include "crypto/cipher.h" #include "qapi/error.h" #include "qom/object_interfaces.h" -#include "qemu/base64.h" #include "qemu/module.h" #include "trace.h" static void -qcrypto_secret_load_data(QCryptoSecret *secret, +qcrypto_secret_load_data(QCryptoSecretCommon *sec_common, uint8_t **output, size_t *outputlen, Error **errp) @@ -38,6 +36,8 @@ qcrypto_secret_load_data(QCryptoSecret *secret, size_t length = 0; GError *gerr = NULL; + QCryptoSecret *secret = QCRYPTO_SECRET(sec_common); + *output = NULL; *outputlen = 0; @@ -65,198 +65,6 @@ qcrypto_secret_load_data(QCryptoSecret *secret, } -static void qcrypto_secret_decrypt(QCryptoSecret *secret, - const uint8_t *input, - size_t inputlen, - uint8_t **output, - size_t *outputlen, - Error **errp) -{ - g_autofree uint8_t *key = NULL; - g_autofree uint8_t *ciphertext = NULL; - g_autofree uint8_t *iv = NULL; - size_t keylen, ciphertextlen, ivlen; - g_autoptr(QCryptoCipher) aes = NULL; - g_autofree uint8_t *plaintext = NULL; - - *output = NULL; - *outputlen = 0; - - if (qcrypto_secret_lookup(secret->keyid, - &key, &keylen, - errp) < 0) { - return; - } - - if (keylen != 32) { - error_setg(errp, "Key should be 32 bytes in length"); - return; - } - - if (!secret->iv) { - error_setg(errp, "IV is required to decrypt secret"); - return; - } - - iv = qbase64_decode(secret->iv, -1, &ivlen, errp); - if (!iv) { - return; - } - if (ivlen != 16) { - error_setg(errp, "IV should be 16 bytes in length not %zu", - ivlen); - return; - } - - aes = qcrypto_cipher_new(QCRYPTO_CIPHER_ALG_AES_256, - QCRYPTO_CIPHER_MODE_CBC, - key, keylen, - errp); - if (!aes) { - return; - } - - if (qcrypto_cipher_setiv(aes, iv, ivlen, errp) < 0) { - return; - } - - if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) { - ciphertext = qbase64_decode((const gchar*)input, - inputlen, - &ciphertextlen, - errp); - if (!ciphertext) { - return; - } - plaintext = g_new0(uint8_t, ciphertextlen + 1); - } else { - ciphertextlen = inputlen; - plaintext = g_new0(uint8_t, inputlen + 1); - } - if (qcrypto_cipher_decrypt(aes, - ciphertext ? ciphertext : input, - plaintext, - ciphertextlen, - errp) < 0) { - return; - } - - if (plaintext[ciphertextlen - 1] > 16 || - plaintext[ciphertextlen - 1] > ciphertextlen) { - error_setg(errp, "Incorrect number of padding bytes (%d) " - "found on decrypted data", - (int)plaintext[ciphertextlen - 1]); - return; - } - - /* Even though plaintext may contain arbitrary NUL - * ensure it is explicitly NUL terminated. - */ - ciphertextlen -= plaintext[ciphertextlen - 1]; - plaintext[ciphertextlen] = '\0'; - - *output = g_steal_pointer(&plaintext); - *outputlen = ciphertextlen; -} - - -static void qcrypto_secret_decode(const uint8_t *input, - size_t inputlen, - uint8_t **output, - size_t *outputlen, - Error **errp) -{ - *output = qbase64_decode((const gchar*)input, - inputlen, - outputlen, - errp); -} - - -static void -qcrypto_secret_prop_set_loaded(Object *obj, - bool value, - Error **errp) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - - if (value) { - Error *local_err = NULL; - uint8_t *input = NULL; - size_t inputlen = 0; - uint8_t *output = NULL; - size_t outputlen = 0; - - qcrypto_secret_load_data(secret, &input, &inputlen, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - if (secret->keyid) { - qcrypto_secret_decrypt(secret, input, inputlen, - &output, &outputlen, &local_err); - g_free(input); - if (local_err) { - error_propagate(errp, local_err); - return; - } - input = output; - inputlen = outputlen; - } else { - if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) { - qcrypto_secret_decode(input, inputlen, - &output, &outputlen, &local_err); - g_free(input); - if (local_err) { - error_propagate(errp, local_err); - return; - } - input = output; - inputlen = outputlen; - } - } - - secret->rawdata = input; - secret->rawlen = inputlen; - } else { - g_free(secret->rawdata); - secret->rawdata = NULL; - secret->rawlen = 0; - } -} - - -static bool -qcrypto_secret_prop_get_loaded(Object *obj, - Error **errp G_GNUC_UNUSED) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - return secret->rawdata != NULL; -} - - -static void -qcrypto_secret_prop_set_format(Object *obj, - int value, - Error **errp G_GNUC_UNUSED) -{ - QCryptoSecret *creds = QCRYPTO_SECRET(obj); - - creds->format = value; -} - - -static int -qcrypto_secret_prop_get_format(Object *obj, - Error **errp G_GNUC_UNUSED) -{ - QCryptoSecret *creds = QCRYPTO_SECRET(obj); - - return creds->format; -} - - static void qcrypto_secret_prop_set_data(Object *obj, const char *value, @@ -299,48 +107,6 @@ qcrypto_secret_prop_get_file(Object *obj, } -static void -qcrypto_secret_prop_set_iv(Object *obj, - const char *value, - Error **errp) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - - g_free(secret->iv); - secret->iv = g_strdup(value); -} - - -static char * -qcrypto_secret_prop_get_iv(Object *obj, - Error **errp) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - return g_strdup(secret->iv); -} - - -static void -qcrypto_secret_prop_set_keyid(Object *obj, - const char *value, - Error **errp) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - - g_free(secret->keyid); - secret->keyid = g_strdup(value); -} - - -static char * -qcrypto_secret_prop_get_keyid(Object *obj, - Error **errp) -{ - QCryptoSecret *secret = QCRYPTO_SECRET(obj); - return g_strdup(secret->keyid); -} - - static void qcrypto_secret_complete(UserCreatable *uc, Error **errp) { @@ -353,129 +119,30 @@ qcrypto_secret_finalize(Object *obj) { QCryptoSecret *secret = QCRYPTO_SECRET(obj); - g_free(secret->iv); g_free(secret->file); - g_free(secret->keyid); - g_free(secret->rawdata); g_free(secret->data); } static void qcrypto_secret_class_init(ObjectClass *oc, void *data) { - UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); + QCryptoSecretCommonClass *sic = QCRYPTO_SECRET_COMMON_CLASS(oc); + sic->load_data = qcrypto_secret_load_data; + UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); ucc->complete = qcrypto_secret_complete; - object_class_property_add_bool(oc, "loaded", - qcrypto_secret_prop_get_loaded, - qcrypto_secret_prop_set_loaded); - object_class_property_add_enum(oc, "format", - "QCryptoSecretFormat", - &QCryptoSecretFormat_lookup, - qcrypto_secret_prop_get_format, - qcrypto_secret_prop_set_format); object_class_property_add_str(oc, "data", qcrypto_secret_prop_get_data, qcrypto_secret_prop_set_data); object_class_property_add_str(oc, "file", qcrypto_secret_prop_get_file, qcrypto_secret_prop_set_file); - object_class_property_add_str(oc, "keyid", - qcrypto_secret_prop_get_keyid, - qcrypto_secret_prop_set_keyid); - object_class_property_add_str(oc, "iv", - qcrypto_secret_prop_get_iv, - qcrypto_secret_prop_set_iv); -} - - -int qcrypto_secret_lookup(const char *secretid, - uint8_t **data, - size_t *datalen, - Error **errp) -{ - Object *obj; - QCryptoSecret *secret; - - obj = object_resolve_path_component( - object_get_objects_root(), secretid); - if (!obj) { - error_setg(errp, "No secret with id '%s'", secretid); - return -1; - } - - secret = (QCryptoSecret *) - object_dynamic_cast(obj, - TYPE_QCRYPTO_SECRET); - if (!secret) { - error_setg(errp, "Object with id '%s' is not a secret", - secretid); - return -1; - } - - if (!secret->rawdata) { - error_setg(errp, "Secret with id '%s' has no data", - secretid); - return -1; - } - - *data = g_new0(uint8_t, secret->rawlen + 1); - memcpy(*data, secret->rawdata, secret->rawlen); - (*data)[secret->rawlen] = '\0'; - *datalen = secret->rawlen; - - return 0; -} - - -char *qcrypto_secret_lookup_as_utf8(const char *secretid, - Error **errp) -{ - uint8_t *data; - size_t datalen; - - if (qcrypto_secret_lookup(secretid, - &data, - &datalen, - errp) < 0) { - return NULL; - } - - if (!g_utf8_validate((const gchar*)data, datalen, NULL)) { - error_setg(errp, - "Data from secret %s is not valid UTF-8", - secretid); - g_free(data); - return NULL; - } - - return (char *)data; -} - - -char *qcrypto_secret_lookup_as_base64(const char *secretid, - Error **errp) -{ - uint8_t *data; - size_t datalen; - char *ret; - - if (qcrypto_secret_lookup(secretid, - &data, - &datalen, - errp) < 0) { - return NULL; - } - - ret = g_base64_encode(data, datalen); - g_free(data); - return ret; } static const TypeInfo qcrypto_secret_info = { - .parent = TYPE_OBJECT, + .parent = TYPE_QCRYPTO_SECRET_COMMON, .name = TYPE_QCRYPTO_SECRET, .instance_size = sizeof(QCryptoSecret), .instance_finalize = qcrypto_secret_finalize, diff --git a/crypto/secret_common.c b/crypto/secret_common.c new file mode 100644 index 0000000000..b03d530867 --- /dev/null +++ b/crypto/secret_common.c @@ -0,0 +1,403 @@ +/* + * QEMU crypto secret support + * + * Copyright (c) 2015 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + * + */ + +#include "qemu/osdep.h" +#include "crypto/secret_common.h" +#include "crypto/cipher.h" +#include "qapi/error.h" +#include "qom/object_interfaces.h" +#include "qemu/base64.h" +#include "qemu/module.h" +#include "trace.h" + + +static void qcrypto_secret_decrypt(QCryptoSecretCommon *secret, + const uint8_t *input, + size_t inputlen, + uint8_t **output, + size_t *outputlen, + Error **errp) +{ + g_autofree uint8_t *iv = NULL; + g_autofree uint8_t *key = NULL; + g_autofree uint8_t *ciphertext = NULL; + size_t keylen, ciphertextlen, ivlen; + g_autoptr(QCryptoCipher) aes = NULL; + g_autofree uint8_t *plaintext = NULL; + + *output = NULL; + *outputlen = 0; + + if (qcrypto_secret_lookup(secret->keyid, + &key, &keylen, + errp) < 0) { + return; + } + + if (keylen != 32) { + error_setg(errp, "Key should be 32 bytes in length"); + return; + } + + if (!secret->iv) { + error_setg(errp, "IV is required to decrypt secret"); + return; + } + + iv = qbase64_decode(secret->iv, -1, &ivlen, errp); + if (!iv) { + return; + } + if (ivlen != 16) { + error_setg(errp, "IV should be 16 bytes in length not %zu", + ivlen); + return; + } + + aes = qcrypto_cipher_new(QCRYPTO_CIPHER_ALG_AES_256, + QCRYPTO_CIPHER_MODE_CBC, + key, keylen, + errp); + if (!aes) { + return; + } + + if (qcrypto_cipher_setiv(aes, iv, ivlen, errp) < 0) { + return; + } + + if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) { + ciphertext = qbase64_decode((const gchar *)input, + inputlen, + &ciphertextlen, + errp); + if (!ciphertext) { + return; + } + plaintext = g_new0(uint8_t, ciphertextlen + 1); + } else { + ciphertextlen = inputlen; + plaintext = g_new0(uint8_t, inputlen + 1); + } + if (qcrypto_cipher_decrypt(aes, + ciphertext ? ciphertext : input, + plaintext, + ciphertextlen, + errp) < 0) { + return; + } + + if (plaintext[ciphertextlen - 1] > 16 || + plaintext[ciphertextlen - 1] > ciphertextlen) { + error_setg(errp, "Incorrect number of padding bytes (%d) " + "found on decrypted data", + (int)plaintext[ciphertextlen - 1]); + return; + } + + /* + * Even though plaintext may contain arbitrary NUL + * ensure it is explicitly NUL terminated. + */ + ciphertextlen -= plaintext[ciphertextlen - 1]; + plaintext[ciphertextlen] = '\0'; + + *output = g_steal_pointer(&plaintext); + *outputlen = ciphertextlen; +} + + +static void qcrypto_secret_decode(const uint8_t *input, + size_t inputlen, + uint8_t **output, + size_t *outputlen, + Error **errp) +{ + *output = qbase64_decode((const gchar *)input, + inputlen, + outputlen, + errp); +} + + +static void +qcrypto_secret_prop_set_loaded(Object *obj, + bool value, + Error **errp) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + QCryptoSecretCommonClass *sec_class + = QCRYPTO_SECRET_COMMON_GET_CLASS(obj); + + if (value) { + Error *local_err = NULL; + uint8_t *input = NULL; + size_t inputlen = 0; + uint8_t *output = NULL; + size_t outputlen = 0; + + if (sec_class->load_data) { + sec_class->load_data(secret, &input, &inputlen, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + } else { + error_setg(errp, "%s provides no 'load_data' method'", + object_get_typename(obj)); + return; + } + + if (secret->keyid) { + qcrypto_secret_decrypt(secret, input, inputlen, + &output, &outputlen, &local_err); + g_free(input); + if (local_err) { + error_propagate(errp, local_err); + return; + } + input = output; + inputlen = outputlen; + } else { + if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) { + qcrypto_secret_decode(input, inputlen, + &output, &outputlen, &local_err); + g_free(input); + if (local_err) { + error_propagate(errp, local_err); + return; + } + input = output; + inputlen = outputlen; + } + } + + secret->rawdata = input; + secret->rawlen = inputlen; + } else { + g_free(secret->rawdata); + secret->rawlen = 0; + } +} + + +static bool +qcrypto_secret_prop_get_loaded(Object *obj, + Error **errp G_GNUC_UNUSED) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + return secret->rawdata != NULL; +} + + +static void +qcrypto_secret_prop_set_format(Object *obj, + int value, + Error **errp G_GNUC_UNUSED) +{ + QCryptoSecretCommon *creds = QCRYPTO_SECRET_COMMON(obj); + creds->format = value; +} + + +static int +qcrypto_secret_prop_get_format(Object *obj, + Error **errp G_GNUC_UNUSED) +{ + QCryptoSecretCommon *creds = QCRYPTO_SECRET_COMMON(obj); + return creds->format; +} + + +static void +qcrypto_secret_prop_set_iv(Object *obj, + const char *value, + Error **errp) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + + g_free(secret->iv); + secret->iv = g_strdup(value); +} + + +static char * +qcrypto_secret_prop_get_iv(Object *obj, + Error **errp) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + return g_strdup(secret->iv); +} + + +static void +qcrypto_secret_prop_set_keyid(Object *obj, + const char *value, + Error **errp) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + + g_free(secret->keyid); + secret->keyid = g_strdup(value); +} + + +static char * +qcrypto_secret_prop_get_keyid(Object *obj, + Error **errp) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + return g_strdup(secret->keyid); +} + + +static void +qcrypto_secret_finalize(Object *obj) +{ + QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj); + + g_free(secret->iv); + g_free(secret->keyid); + g_free(secret->rawdata); +} + +static void +qcrypto_secret_class_init(ObjectClass *oc, void *data) +{ + object_class_property_add_bool(oc, "loaded", + qcrypto_secret_prop_get_loaded, + qcrypto_secret_prop_set_loaded); + object_class_property_add_enum(oc, "format", + "QCryptoSecretFormat", + &QCryptoSecretFormat_lookup, + qcrypto_secret_prop_get_format, + qcrypto_secret_prop_set_format); + object_class_property_add_str(oc, "keyid", + qcrypto_secret_prop_get_keyid, + qcrypto_secret_prop_set_keyid); + object_class_property_add_str(oc, "iv", + qcrypto_secret_prop_get_iv, + qcrypto_secret_prop_set_iv); +} + + +int qcrypto_secret_lookup(const char *secretid, + uint8_t **data, + size_t *datalen, + Error **errp) +{ + Object *obj; + QCryptoSecretCommon *secret; + + obj = object_resolve_path_component( + object_get_objects_root(), secretid); + if (!obj) { + error_setg(errp, "No secret with id '%s'", secretid); + return -1; + } + + secret = (QCryptoSecretCommon *) + object_dynamic_cast(obj, + TYPE_QCRYPTO_SECRET_COMMON); + if (!secret) { + error_setg(errp, "Object with id '%s' is not a secret", + secretid); + return -1; + } + + if (!secret->rawdata) { + error_setg(errp, "Secret with id '%s' has no data", + secretid); + return -1; + } + + *data = g_new0(uint8_t, secret->rawlen + 1); + memcpy(*data, secret->rawdata, secret->rawlen); + (*data)[secret->rawlen] = '\0'; + *datalen = secret->rawlen; + + return 0; +} + + +char *qcrypto_secret_lookup_as_utf8(const char *secretid, + Error **errp) +{ + uint8_t *data; + size_t datalen; + + if (qcrypto_secret_lookup(secretid, + &data, + &datalen, + errp) < 0) { + return NULL; + } + + if (!g_utf8_validate((const gchar *)data, datalen, NULL)) { + error_setg(errp, + "Data from secret %s is not valid UTF-8", + secretid); + g_free(data); + return NULL; + } + + return (char *)data; +} + + +char *qcrypto_secret_lookup_as_base64(const char *secretid, + Error **errp) +{ + uint8_t *data; + size_t datalen; + char *ret; + + if (qcrypto_secret_lookup(secretid, + &data, + &datalen, + errp) < 0) { + return NULL; + } + + ret = g_base64_encode(data, datalen); + g_free(data); + return ret; +} + + +static const TypeInfo qcrypto_secret_info = { + .parent = TYPE_OBJECT, + .name = TYPE_QCRYPTO_SECRET_COMMON, + .instance_size = sizeof(QCryptoSecretCommon), + .instance_finalize = qcrypto_secret_finalize, + .class_size = sizeof(QCryptoSecretCommonClass), + .class_init = qcrypto_secret_class_init, + .abstract = true, +}; + + +static void +qcrypto_secret_register_types(void) +{ + type_register_static(&qcrypto_secret_info); +} + + +type_init(qcrypto_secret_register_types); diff --git a/include/crypto/secret.h b/include/crypto/secret.h index 5e07e29bae..2deb461d2f 100644 --- a/include/crypto/secret.h +++ b/include/crypto/secret.h @@ -23,6 +23,7 @@ #include "qapi/qapi-types-crypto.h" #include "qom/object.h" +#include "crypto/secret_common.h" #define TYPE_QCRYPTO_SECRET "secret" #define QCRYPTO_SECRET(obj) \ @@ -119,29 +120,14 @@ typedef struct QCryptoSecretClass QCryptoSecretClass; */ struct QCryptoSecret { - Object parent_obj; - uint8_t *rawdata; - size_t rawlen; - QCryptoSecretFormat format; + QCryptoSecretCommon parent_obj; char *data; char *file; - char *keyid; - char *iv; }; struct QCryptoSecretClass { - ObjectClass parent_class; + QCryptoSecretCommonClass parent_class; }; - -extern int qcrypto_secret_lookup(const char *secretid, - uint8_t **data, - size_t *datalen, - Error **errp); -extern char *qcrypto_secret_lookup_as_utf8(const char *secretid, - Error **errp); -extern char *qcrypto_secret_lookup_as_base64(const char *secretid, - Error **errp); - #endif /* QCRYPTO_SECRET_H */ diff --git a/include/crypto/secret_common.h b/include/crypto/secret_common.h new file mode 100644 index 0000000000..980c02ab71 --- /dev/null +++ b/include/crypto/secret_common.h @@ -0,0 +1,68 @@ +/* + * QEMU crypto secret support + * + * Copyright (c) 2015 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + * + */ + +#ifndef QCRYPTO_SECRET_COMMON_H +#define QCRYPTO_SECRET_COMMON_H + +#include "qapi/qapi-types-crypto.h" +#include "qom/object.h" + +#define TYPE_QCRYPTO_SECRET_COMMON "secret_common" +#define QCRYPTO_SECRET_COMMON(obj) \ + OBJECT_CHECK(QCryptoSecretCommon, (obj), TYPE_QCRYPTO_SECRET_COMMON) +#define QCRYPTO_SECRET_COMMON_CLASS(class) \ + OBJECT_CLASS_CHECK(QCryptoSecretCommonClass, \ + (class), TYPE_QCRYPTO_SECRET_COMMON) +#define QCRYPTO_SECRET_COMMON_GET_CLASS(obj) \ + OBJECT_GET_CLASS(QCryptoSecretCommonClass, \ + (obj), TYPE_QCRYPTO_SECRET_COMMON) + +typedef struct QCryptoSecretCommon QCryptoSecretCommon; +typedef struct QCryptoSecretCommonClass QCryptoSecretCommonClass; + +struct QCryptoSecretCommon { + Object parent_obj; + uint8_t *rawdata; + size_t rawlen; + QCryptoSecretFormat format; + char *keyid; + char *iv; +}; + + +struct QCryptoSecretCommonClass { + ObjectClass parent_class; + void (*load_data)(QCryptoSecretCommon *secret, + uint8_t **output, + size_t *outputlen, + Error **errp); +}; + + +extern int qcrypto_secret_lookup(const char *secretid, + uint8_t **data, + size_t *datalen, + Error **errp); +extern char *qcrypto_secret_lookup_as_utf8(const char *secretid, + Error **errp); +extern char *qcrypto_secret_lookup_as_base64(const char *secretid, + Error **errp); + +#endif /* QCRYPTO_SECRET_COMMON_H */