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rsakey.h (3126B)

      1 /*
      2  * QEMU Crypto RSA key parser
      3  *
      4  * Copyright (c) 2022 Bytedance
      5  * Author: lei he <helei.sig11@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 #ifndef QCRYPTO_RSAKEY_H
     23 #define QCRYPTO_RSAKEY_H
     24 
     25 #include "qemu/host-utils.h"
     26 #include "crypto/akcipher.h"
     27 
     28 typedef struct QCryptoAkCipherRSAKey QCryptoAkCipherRSAKey;
     29 typedef struct QCryptoAkCipherMPI QCryptoAkCipherMPI;
     30 
     31 /**
     32  * Multiple precious integer, encoded as two' complement,
     33  * copied directly from DER encoded ASN.1 structures.
     34  */
     35 struct QCryptoAkCipherMPI {
     36     uint8_t *data;
     37     size_t len;
     38 };
     39 
     40 /* See rfc2437: https://datatracker.ietf.org/doc/html/rfc2437 */
     41 struct QCryptoAkCipherRSAKey {
     42     /* The modulus */
     43     QCryptoAkCipherMPI n;
     44     /* The public exponent */
     45     QCryptoAkCipherMPI e;
     46     /* The private exponent */
     47     QCryptoAkCipherMPI d;
     48     /* The first factor */
     49     QCryptoAkCipherMPI p;
     50     /* The second factor */
     51     QCryptoAkCipherMPI q;
     52     /* The first factor's exponent */
     53     QCryptoAkCipherMPI dp;
     54     /* The second factor's exponent */
     55     QCryptoAkCipherMPI dq;
     56     /* The CRT coefficient */
     57     QCryptoAkCipherMPI u;
     58 };
     59 
     60 /**
     61  * Parse DER encoded ASN.1 RSA keys, expected ASN.1 schemas:
     62  *        RsaPrivKey ::= SEQUENCE {
     63  *             version     INTEGER
     64  *             n           INTEGER
     65  *             e           INTEGER
     66  *             d           INTEGER
     67  *             p           INTEGER
     68  *             q           INTEGER
     69  *             dp          INTEGER
     70  *             dq          INTEGER
     71  *             u           INTEGER
     72  *       otherPrimeInfos   OtherPrimeInfos OPTIONAL
     73  *         }
     74  *
     75  *        RsaPubKey ::= SEQUENCE {
     76  *             n           INTEGER
     77  *             e           INTEGER
     78  *         }
     79  *
     80  * Returns: On success QCryptoAkCipherRSAKey is returned, otherwise returns NULL
     81  */
     82 QCryptoAkCipherRSAKey *qcrypto_akcipher_rsakey_parse(
     83     QCryptoAkCipherKeyType type,
     84     const uint8_t *key, size_t keylen, Error **errp);
     85 
     86 /**
     87  * qcrypto_akcipher_rsakey_export_as_p8info:
     88  *
     89  * Export RSA private key to PKCS#8 private key info.
     90  */
     91 void qcrypto_akcipher_rsakey_export_p8info(const uint8_t *key,
     92                                            size_t keylen,
     93                                            uint8_t **dst,
     94                                            size_t *dlen);
     95 
     96 void qcrypto_akcipher_rsakey_free(QCryptoAkCipherRSAKey *key);
     97 
     98 G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoAkCipherRSAKey,
     99                               qcrypto_akcipher_rsakey_free);
    100 
    101 #endif