crypto: Introduce akcipher crypto class
Introduce new akcipher crypto class 'QCryptoAkCIpher', which supports basic asymmetric operations: encrypt, decrypt, sign and verify. Suggested by Daniel P. Berrangé, also add autoptr cleanup for the new class. Thanks to Daniel! Co-developed-by: lei he <helei.sig11@bytedance.com> Signed-off-by: lei he <helei.sig11@bytedance.com> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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zhenwei pi
Daniel P. Berrangé
parent
daa55f3ecf
commit
db5ca5fbfa
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/*
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* QEMU Crypto akcipher algorithms
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*
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* Copyright (c) 2022 Bytedance
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* Author: zhenwei pi <pizhenwei@bytedance.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "crypto/akcipher.h"
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#include "akcipherpriv.h"
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QCryptoAkCipher *qcrypto_akcipher_new(const QCryptoAkCipherOptions *opts,
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QCryptoAkCipherKeyType type,
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const uint8_t *key, size_t keylen,
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Error **errp)
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{
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QCryptoAkCipher *akcipher = NULL;
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return akcipher;
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}
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bool qcrypto_akcipher_supports(QCryptoAkCipherOptions *opts)
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{
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return false;
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}
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int qcrypto_akcipher_encrypt(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp)
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{
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const QCryptoAkCipherDriver *drv = akcipher->driver;
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return drv->encrypt(akcipher, in, in_len, out, out_len, errp);
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}
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int qcrypto_akcipher_decrypt(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp)
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{
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const QCryptoAkCipherDriver *drv = akcipher->driver;
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return drv->decrypt(akcipher, in, in_len, out, out_len, errp);
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}
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int qcrypto_akcipher_sign(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp)
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{
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const QCryptoAkCipherDriver *drv = akcipher->driver;
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return drv->sign(akcipher, in, in_len, out, out_len, errp);
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}
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int qcrypto_akcipher_verify(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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const void *in2, size_t in2_len, Error **errp)
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{
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const QCryptoAkCipherDriver *drv = akcipher->driver;
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return drv->verify(akcipher, in, in_len, in2, in2_len, errp);
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}
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int qcrypto_akcipher_max_plaintext_len(QCryptoAkCipher *akcipher)
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{
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return akcipher->max_plaintext_len;
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}
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int qcrypto_akcipher_max_ciphertext_len(QCryptoAkCipher *akcipher)
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{
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return akcipher->max_ciphertext_len;
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}
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int qcrypto_akcipher_max_signature_len(QCryptoAkCipher *akcipher)
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{
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return akcipher->max_signature_len;
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}
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int qcrypto_akcipher_max_dgst_len(QCryptoAkCipher *akcipher)
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{
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return akcipher->max_dgst_len;
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}
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void qcrypto_akcipher_free(QCryptoAkCipher *akcipher)
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{
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const QCryptoAkCipherDriver *drv = akcipher->driver;
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drv->free(akcipher);
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}
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@ -0,0 +1,55 @@
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/*
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* QEMU Crypto asymmetric algorithms
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*
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* Copyright (c) 2022 Bytedance
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* Author: zhenwei pi <pizhenwei@bytedance.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QCRYPTO_AKCIPHERPRIV_H
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#define QCRYPTO_AKCIPHERPRIV_H
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#include "qapi/qapi-types-crypto.h"
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typedef struct QCryptoAkCipherDriver QCryptoAkCipherDriver;
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struct QCryptoAkCipher {
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QCryptoAkCipherAlgorithm alg;
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QCryptoAkCipherKeyType type;
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int max_plaintext_len;
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int max_ciphertext_len;
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int max_signature_len;
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int max_dgst_len;
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QCryptoAkCipherDriver *driver;
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};
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struct QCryptoAkCipherDriver {
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int (*encrypt)(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp);
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int (*decrypt)(QCryptoAkCipher *akcipher,
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const void *out, size_t out_len,
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void *in, size_t in_len, Error **errp);
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int (*sign)(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp);
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int (*verify)(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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const void *in2, size_t in2_len, Error **errp);
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void (*free)(QCryptoAkCipher *akcipher);
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};
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#endif /* QCRYPTO_AKCIPHER_H */
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@ -1,6 +1,7 @@
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crypto_ss.add(genh)
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crypto_ss.add(files(
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'afsplit.c',
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'akcipher.c',
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'block-luks.c',
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'block-qcow.c',
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'block.c',
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@ -0,0 +1,158 @@
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/*
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* QEMU Crypto asymmetric algorithms
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*
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* Copyright (c) 2022 Bytedance
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* Author: zhenwei pi <pizhenwei@bytedance.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QCRYPTO_AKCIPHER_H
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#define QCRYPTO_AKCIPHER_H
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#include "qapi/qapi-types-crypto.h"
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typedef struct QCryptoAkCipher QCryptoAkCipher;
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/**
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* qcrypto_akcipher_supports:
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* @opts: the asymmetric key algorithm and related options
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*
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* Determine if asymmetric key cipher decribed with @opts is
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* supported by the current configured build
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*
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* Returns: true if it is supported, false otherwise.
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*/
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bool qcrypto_akcipher_supports(QCryptoAkCipherOptions *opts);
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/**
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* qcrypto_akcipher_new:
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* @opts: specify the algorithm and the related arguments
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* @type: private or public key type
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* @key: buffer to store the key
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* @key_len: the length of key buffer
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* @errp: error pointer
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*
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* Create akcipher context
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*
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* Returns: On success, a new QCryptoAkCipher initialized with @opt
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* is created and returned, otherwise NULL is returned.
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*/
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QCryptoAkCipher *qcrypto_akcipher_new(const QCryptoAkCipherOptions *opts,
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QCryptoAkCipherKeyType type,
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const uint8_t *key, size_t key_len,
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Error **errp);
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/**
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* qcrypto_akcipher_encrypt:
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* @akcipher: akcipher context
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* @in: plaintext pending to be encrypted
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* @in_len: length of plaintext, less or equal to the size reported
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* by a call to qcrypto_akcipher_max_plaintext_len()
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* @out: buffer to store the ciphertext
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* @out_len: length of ciphertext, less or equal to the size reported
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* by a call to qcrypto_akcipher_max_ciphertext_len()
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* @errp: error pointer
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*
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* Encrypt @in and write ciphertext into @out
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*
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* Returns: length of ciphertext if encrypt succeed,
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* otherwise -1 is returned
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*/
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int qcrypto_akcipher_encrypt(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp);
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/**
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* qcrypto_akcipher_decrypt:
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* @akcipher: akcipher context
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* @in: ciphertext to be decrypted
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* @in_len: the length of ciphertext, less or equal to the size reported
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* by a call to qcrypto_akcipher_max_ciphertext_len()
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* @out: buffer to store the plaintext
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* @out_len: length of the plaintext buffer, less or equal to the size
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* reported by a call to qcrypto_akcipher_max_plaintext_len()
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* @errp: error pointer
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*
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* Decrypt @in and write plaintext into @out
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*
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* Returns: length of plaintext if decrypt succeed,
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* otherwise -1 is returned
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*/
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int qcrypto_akcipher_decrypt(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp);
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/**
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* qcrypto_akcipher_sign:
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* @akcipher: akcipher context
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* @in: data to be signed
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* @in_len: the length of data, less or equal to the size reported
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* by a call to qcrypto_akcipher_max_dgst_len()
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* @out: buffer to store the signature
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* @out_len: length of the signature buffer, less or equal to the size
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* by a call to qcrypto_akcipher_max_signature_len()
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* @errp: error pointer
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*
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* Generate signature for @in, write into @out
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*
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* Returns: length of signature if succeed,
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* otherwise -1 is returned
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*/
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int qcrypto_akcipher_sign(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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void *out, size_t out_len, Error **errp);
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/**
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* qcrypto_akcipher_verify:
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* @akcipher: akcipher context
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* @in: pointer to the signature
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* @in_len: length of signature, ess or equal to the size reported
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* by a call to qcrypto_akcipher_max_signature_len()
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* @in2: pointer to original data
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* @in2_len: the length of original data, less or equal to the size
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* by a call to qcrypto_akcipher_max_dgst_len()
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* @errp: error pointer
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*
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* Verify @in and @in2 match or not
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*
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* Returns: 0 for succeed,
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* otherwise -1 is returned
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*/
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int qcrypto_akcipher_verify(QCryptoAkCipher *akcipher,
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const void *in, size_t in_len,
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const void *in2, size_t in2_len, Error **errp);
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int qcrypto_akcipher_max_plaintext_len(QCryptoAkCipher *akcipher);
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int qcrypto_akcipher_max_ciphertext_len(QCryptoAkCipher *akcipher);
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int qcrypto_akcipher_max_signature_len(QCryptoAkCipher *akcipher);
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int qcrypto_akcipher_max_dgst_len(QCryptoAkCipher *akcipher);
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/**
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* qcrypto_akcipher_free:
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* @akcipher: akcipher context
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*
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* Free the akcipher context
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*
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*/
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void qcrypto_akcipher_free(QCryptoAkCipher *akcipher);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoAkCipher, qcrypto_akcipher_free)
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#endif /* QCRYPTO_AKCIPHER_H */
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