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@xxxxxxxxxxxxx> Signed-off-by: lei he <helei.sig11@xxxxxxxxxxxxx> Signed-off-by: zhenwei pi <pizhenwei@xxxxxxxxxxxxx> Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx> --- crypto/akcipher.c | 102 ++++++++++++++++++++++++ crypto/akcipherpriv.h | 55 +++++++++++++ crypto/meson.build | 1 + include/crypto/akcipher.h | 158 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 316 insertions(+) create mode 100644 crypto/akcipher.c create mode 100644 crypto/akcipherpriv.h create mode 100644 include/crypto/akcipher.h diff --git a/crypto/akcipher.c b/crypto/akcipher.c new file mode 100644 index 0000000000..ab28bf415b --- /dev/null +++ b/crypto/akcipher.c @@ -0,0 +1,102 @@ +/* + * QEMU Crypto akcipher algorithms + * + * Copyright (c) 2022 Bytedance + * Author: zhenwei pi <pizhenwei@xxxxxxxxxxxxx> + * + * 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 <http://www.gnu.org/licenses/>. + * + */ + +#include "qemu/osdep.h" +#include "crypto/akcipher.h" +#include "akcipherpriv.h" + +QCryptoAkCipher *qcrypto_akcipher_new(const QCryptoAkCipherOptions *opts, + QCryptoAkCipherKeyType type, + const uint8_t *key, size_t keylen, + Error **errp) +{ + QCryptoAkCipher *akcipher = NULL; + + return akcipher; +} + +bool qcrypto_akcipher_supports(QCryptoAkCipherOptions *opts) +{ + return false; +} + +int qcrypto_akcipher_encrypt(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp) +{ + const QCryptoAkCipherDriver *drv = akcipher->driver; + + return drv->encrypt(akcipher, in, in_len, out, out_len, errp); +} + +int qcrypto_akcipher_decrypt(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp) +{ + const QCryptoAkCipherDriver *drv = akcipher->driver; + + return drv->decrypt(akcipher, in, in_len, out, out_len, errp); +} + +int qcrypto_akcipher_sign(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp) +{ + const QCryptoAkCipherDriver *drv = akcipher->driver; + + return drv->sign(akcipher, in, in_len, out, out_len, errp); +} + +int qcrypto_akcipher_verify(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + const void *in2, size_t in2_len, Error **errp) +{ + const QCryptoAkCipherDriver *drv = akcipher->driver; + + return drv->verify(akcipher, in, in_len, in2, in2_len, errp); +} + +int qcrypto_akcipher_max_plaintext_len(QCryptoAkCipher *akcipher) +{ + return akcipher->max_plaintext_len; +} + +int qcrypto_akcipher_max_ciphertext_len(QCryptoAkCipher *akcipher) +{ + return akcipher->max_ciphertext_len; +} + +int qcrypto_akcipher_max_signature_len(QCryptoAkCipher *akcipher) +{ + return akcipher->max_signature_len; +} + +int qcrypto_akcipher_max_dgst_len(QCryptoAkCipher *akcipher) +{ + return akcipher->max_dgst_len; +} + +void qcrypto_akcipher_free(QCryptoAkCipher *akcipher) +{ + const QCryptoAkCipherDriver *drv = akcipher->driver; + + drv->free(akcipher); +} diff --git a/crypto/akcipherpriv.h b/crypto/akcipherpriv.h new file mode 100644 index 0000000000..739f639bcf --- /dev/null +++ b/crypto/akcipherpriv.h @@ -0,0 +1,55 @@ +/* + * QEMU Crypto asymmetric algorithms + * + * Copyright (c) 2022 Bytedance + * Author: zhenwei pi <pizhenwei@xxxxxxxxxxxxx> + * + * 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 <http://www.gnu.org/licenses/>. + * + */ + +#ifndef QCRYPTO_AKCIPHERPRIV_H +#define QCRYPTO_AKCIPHERPRIV_H + +#include "qapi/qapi-types-crypto.h" + +typedef struct QCryptoAkCipherDriver QCryptoAkCipherDriver; + +struct QCryptoAkCipher { + QCryptoAkCipherAlgorithm alg; + QCryptoAkCipherKeyType type; + int max_plaintext_len; + int max_ciphertext_len; + int max_signature_len; + int max_dgst_len; + QCryptoAkCipherDriver *driver; +}; + +struct QCryptoAkCipherDriver { + int (*encrypt)(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp); + int (*decrypt)(QCryptoAkCipher *akcipher, + const void *out, size_t out_len, + void *in, size_t in_len, Error **errp); + int (*sign)(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp); + int (*verify)(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + const void *in2, size_t in2_len, Error **errp); + void (*free)(QCryptoAkCipher *akcipher); +}; + +#endif /* QCRYPTO_AKCIPHER_H */ diff --git a/crypto/meson.build b/crypto/meson.build index 685fb37097..313f935f27 100644 --- a/crypto/meson.build +++ b/crypto/meson.build @@ -1,6 +1,7 @@ crypto_ss.add(genh) crypto_ss.add(files( 'afsplit.c', + 'akcipher.c', 'block-luks.c', 'block-qcow.c', 'block.c', diff --git a/include/crypto/akcipher.h b/include/crypto/akcipher.h new file mode 100644 index 0000000000..51f5fa2774 --- /dev/null +++ b/include/crypto/akcipher.h @@ -0,0 +1,158 @@ +/* + * QEMU Crypto asymmetric algorithms + * + * Copyright (c) 2022 Bytedance + * Author: zhenwei pi <pizhenwei@xxxxxxxxxxxxx> + * + * 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 <http://www.gnu.org/licenses/>. + * + */ + +#ifndef QCRYPTO_AKCIPHER_H +#define QCRYPTO_AKCIPHER_H + +#include "qapi/qapi-types-crypto.h" + +typedef struct QCryptoAkCipher QCryptoAkCipher; + +/** + * qcrypto_akcipher_supports: + * @opts: the asymmetric key algorithm and related options + * + * Determine if asymmetric key cipher decribed with @opts is + * supported by the current configured build + * + * Returns: true if it is supported, false otherwise. + */ +bool qcrypto_akcipher_supports(QCryptoAkCipherOptions *opts); + +/** + * qcrypto_akcipher_new: + * @opts: specify the algorithm and the related arguments + * @type: private or public key type + * @key: buffer to store the key + * @key_len: the length of key buffer + * @errp: error pointer + * + * Create akcipher context + * + * Returns: On success, a new QCryptoAkCipher initialized with @opt + * is created and returned, otherwise NULL is returned. + */ + +QCryptoAkCipher *qcrypto_akcipher_new(const QCryptoAkCipherOptions *opts, + QCryptoAkCipherKeyType type, + const uint8_t *key, size_t key_len, + Error **errp); + +/** + * qcrypto_akcipher_encrypt: + * @akcipher: akcipher context + * @in: plaintext pending to be encrypted + * @in_len: length of plaintext, less or equal to the size reported + * by a call to qcrypto_akcipher_max_plaintext_len() + * @out: buffer to store the ciphertext + * @out_len: length of ciphertext, less or equal to the size reported + * by a call to qcrypto_akcipher_max_ciphertext_len() + * @errp: error pointer + * + * Encrypt @in and write ciphertext into @out + * + * Returns: length of ciphertext if encrypt succeed, + * otherwise -1 is returned + */ +int qcrypto_akcipher_encrypt(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp); + +/** + * qcrypto_akcipher_decrypt: + * @akcipher: akcipher context + * @in: ciphertext to be decrypted + * @in_len: the length of ciphertext, less or equal to the size reported + * by a call to qcrypto_akcipher_max_ciphertext_len() + * @out: buffer to store the plaintext + * @out_len: length of the plaintext buffer, less or equal to the size + * reported by a call to qcrypto_akcipher_max_plaintext_len() + * @errp: error pointer + * + * Decrypt @in and write plaintext into @out + * + * Returns: length of plaintext if decrypt succeed, + * otherwise -1 is returned + */ +int qcrypto_akcipher_decrypt(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp); + +/** + * qcrypto_akcipher_sign: + * @akcipher: akcipher context + * @in: data to be signed + * @in_len: the length of data, less or equal to the size reported + * by a call to qcrypto_akcipher_max_dgst_len() + * @out: buffer to store the signature + * @out_len: length of the signature buffer, less or equal to the size + * by a call to qcrypto_akcipher_max_signature_len() + * @errp: error pointer + * + * Generate signature for @in, write into @out + * + * Returns: length of signature if succeed, + * otherwise -1 is returned + */ +int qcrypto_akcipher_sign(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + void *out, size_t out_len, Error **errp); + +/** + * qcrypto_akcipher_verify: + * @akcipher: akcipher context + * @in: pointer to the signature + * @in_len: length of signature, ess or equal to the size reported + * by a call to qcrypto_akcipher_max_signature_len() + * @in2: pointer to original data + * @in2_len: the length of original data, less or equal to the size + * by a call to qcrypto_akcipher_max_dgst_len() + * @errp: error pointer + * + * Verify @in and @in2 match or not + * + * Returns: 0 for succeed, + * otherwise -1 is returned + */ +int qcrypto_akcipher_verify(QCryptoAkCipher *akcipher, + const void *in, size_t in_len, + const void *in2, size_t in2_len, Error **errp); + +int qcrypto_akcipher_max_plaintext_len(QCryptoAkCipher *akcipher); + +int qcrypto_akcipher_max_ciphertext_len(QCryptoAkCipher *akcipher); + +int qcrypto_akcipher_max_signature_len(QCryptoAkCipher *akcipher); + +int qcrypto_akcipher_max_dgst_len(QCryptoAkCipher *akcipher); + +/** + * qcrypto_akcipher_free: + * @akcipher: akcipher context + * + * Free the akcipher context + * + */ +void qcrypto_akcipher_free(QCryptoAkCipher *akcipher); + +G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoAkCipher, qcrypto_akcipher_free) + +#endif /* QCRYPTO_AKCIPHER_H */ -- 2.20.1
