crypto/akcipher.c

   1 /*
   2  * QEMU Crypto akcipher algorithms
   3  *
   4  * Copyright (c) 2022 Bytedance
   5  * Author: zhenwei pi <pizhenwei@bytedance.com>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 #include "qemu/osdep.h"
  23 #include "crypto/akcipher.h"
  24 #include "akcipherpriv.h"
  25 #include "der.h"
  26 #include "rsakey.h"
  27
  28 #if defined(CONFIG_GCRYPT)
  29 #include "akcipher-gcrypt.c.inc"
  30 #elif defined(CONFIG_NETTLE) && defined(CONFIG_HOGWEED)
  31 #include "akcipher-nettle.c.inc"
  32 #else
  33 QCryptoAkCipher *qcrypto_akcipher_new(const QCryptoAkCipherOptions *opts,
  34                                       QCryptoAkCipherKeyType type,
  35                                       const uint8_t *key, size_t keylen,
  36                                       Error **errp)
  37 {
  38     QCryptoAkCipher *akcipher = NULL;
  39
  40     return akcipher;
  41 }
  42
  43 bool qcrypto_akcipher_supports(QCryptoAkCipherOptions *opts)
  44 {
  45     return false;
  46 }
  47 #endif
  48
  49 int qcrypto_akcipher_encrypt(QCryptoAkCipher *akcipher,
  50                              const void *in, size_t in_len,
  51                              void *out, size_t out_len, Error **errp)
  52 {
  53     const QCryptoAkCipherDriver *drv = akcipher->driver;
  54
  55     return drv->encrypt(akcipher, in, in_len, out, out_len, errp);
  56 }
  57
  58 int qcrypto_akcipher_decrypt(QCryptoAkCipher *akcipher,
  59                              const void *in, size_t in_len,
  60                              void *out, size_t out_len, Error **errp)
  61 {
  62     const QCryptoAkCipherDriver *drv = akcipher->driver;
  63
  64     return drv->decrypt(akcipher, in, in_len, out, out_len, errp);
  65 }
  66
  67 int qcrypto_akcipher_sign(QCryptoAkCipher *akcipher,
  68                           const void *in, size_t in_len,
  69                           void *out, size_t out_len, Error **errp)
  70 {
  71     const QCryptoAkCipherDriver *drv = akcipher->driver;
  72
  73     return drv->sign(akcipher, in, in_len, out, out_len, errp);
  74 }
  75
  76 int qcrypto_akcipher_verify(QCryptoAkCipher *akcipher,
  77                             const void *in, size_t in_len,
  78                             const void *in2, size_t in2_len, Error **errp)
  79 {
  80     const QCryptoAkCipherDriver *drv = akcipher->driver;
  81
  82     return drv->verify(akcipher, in, in_len, in2, in2_len, errp);
  83 }
  84
  85 int qcrypto_akcipher_max_plaintext_len(QCryptoAkCipher *akcipher)
  86 {
  87     return akcipher->max_plaintext_len;
  88 }
  89
  90 int qcrypto_akcipher_max_ciphertext_len(QCryptoAkCipher *akcipher)
  91 {
  92     return akcipher->max_ciphertext_len;
  93 }
  94
  95 int qcrypto_akcipher_max_signature_len(QCryptoAkCipher *akcipher)
  96 {
  97     return akcipher->max_signature_len;
  98 }
  99
 100 int qcrypto_akcipher_max_dgst_len(QCryptoAkCipher *akcipher)
 101 {
 102     return akcipher->max_dgst_len;
 103 }
 104
 105 void qcrypto_akcipher_free(QCryptoAkCipher *akcipher)
 106 {
 107     const QCryptoAkCipherDriver *drv = akcipher->driver;
 108
 109     drv->free(akcipher);
 110 }
 111
 112 int qcrypto_akcipher_export_p8info(const QCryptoAkCipherOptions *opts,
 113                                    uint8_t *key, size_t keylen,
 114                                    uint8_t **dst, size_t *dst_len,
 115                                    Error **errp)
 116 {
 117     switch (opts->alg) {
 118     case QCRYPTO_AK_CIPHER_ALGO_RSA:
 119         qcrypto_akcipher_rsakey_export_p8info(key, keylen, dst, dst_len);
 120         return 0;
 121
 122     default:
 123         error_setg(errp, "Unsupported algorithm: %u", opts->alg);
 124         return -1;
 125     }
 126 }