| 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 |