Xuyi Wang / wolfssh

ssh

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src/keygen.c@0:c4152c628df5, 2019-11-25 (annotated)

Committer:
sPymbed
Date:
Mon Nov 25 14:24:05 2019 +0000
Revision:
0:c4152c628df5
first commit

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sPymbed 0:c4152c628df5 1 /* keygen.c
sPymbed 0:c4152c628df5 2 *
sPymbed 0:c4152c628df5 3 * Copyright (C) 2014-2016 wolfSSL Inc.
sPymbed 0:c4152c628df5 4 *
sPymbed 0:c4152c628df5 5 * This file is part of wolfSSH.
sPymbed 0:c4152c628df5 6 *
sPymbed 0:c4152c628df5 7 * wolfSSH is free software; you can redistribute it and/or modify
sPymbed 0:c4152c628df5 8 * it under the terms of the GNU General Public License as published by
sPymbed 0:c4152c628df5 9 * the Free Software Foundation; either version 3 of the License, or
sPymbed 0:c4152c628df5 10 * (at your option) any later version.
sPymbed 0:c4152c628df5 11 *
sPymbed 0:c4152c628df5 12 * wolfSSH is distributed in the hope that it will be useful,
sPymbed 0:c4152c628df5 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
sPymbed 0:c4152c628df5 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
sPymbed 0:c4152c628df5 15 * GNU General Public License for more details.
sPymbed 0:c4152c628df5 16 *
sPymbed 0:c4152c628df5 17 * You should have received a copy of the GNU General Public License
sPymbed 0:c4152c628df5 18 * along with wolfSSH. If not, see <http://www.gnu.org/licenses/>.
sPymbed 0:c4152c628df5 19 */
sPymbed 0:c4152c628df5 20
sPymbed 0:c4152c628df5 21
sPymbed 0:c4152c628df5 22 /*
sPymbed 0:c4152c628df5 23 * The keygen module contains utility functions wrapping the wolfCrypt
sPymbed 0:c4152c628df5 24 * key generation functions to product SSH friendly keys.
sPymbed 0:c4152c628df5 25 */
sPymbed 0:c4152c628df5 26
sPymbed 0:c4152c628df5 27
sPymbed 0:c4152c628df5 28 #ifdef HAVE_CONFIG_H
sPymbed 0:c4152c628df5 29 #include <config.h>
sPymbed 0:c4152c628df5 30 #endif
sPymbed 0:c4152c628df5 31
sPymbed 0:c4152c628df5 32 #include <wolfssl/options.h>
sPymbed 0:c4152c628df5 33 #include <wolfcrypt/random.h>
sPymbed 0:c4152c628df5 34 #include <wolfcrypt/rsa.h>
sPymbed 0:c4152c628df5 35 #include <wolfssh/error.h>
sPymbed 0:c4152c628df5 36 #include <wolfssh/keygen.h>
sPymbed 0:c4152c628df5 37 #include <wolfssh/log.h>
sPymbed 0:c4152c628df5 38
sPymbed 0:c4152c628df5 39 #ifdef WOLFSSH_KEYGEN
sPymbed 0:c4152c628df5 40
sPymbed 0:c4152c628df5 41 #ifdef NO_INLINE
sPymbed 0:c4152c628df5 42 #include <wolfssh/misc.h>
sPymbed 0:c4152c628df5 43 #else
sPymbed 0:c4152c628df5 44 #define WOLFSSH_MISC_INCLUDED
sPymbed 0:c4152c628df5 45 #include "src/misc.c"
sPymbed 0:c4152c628df5 46 #endif
sPymbed 0:c4152c628df5 47
sPymbed 0:c4152c628df5 48
sPymbed 0:c4152c628df5 49 int wolfSSH_MakeRsaKey(byte* out, word32 outSz,
sPymbed 0:c4152c628df5 50 word32 size, word32 e)
sPymbed 0:c4152c628df5 51 {
sPymbed 0:c4152c628df5 52 int ret = WS_SUCCESS;
sPymbed 0:c4152c628df5 53 WC_RNG rng;
sPymbed 0:c4152c628df5 54
sPymbed 0:c4152c628df5 55 WLOG(WS_LOG_DEBUG, "Entering wolfSSH_MakeRsaKey()");
sPymbed 0:c4152c628df5 56
sPymbed 0:c4152c628df5 57 if (wc_InitRng(&rng) != 0) {
sPymbed 0:c4152c628df5 58 WLOG(WS_LOG_DEBUG, "Couldn't create RNG");
sPymbed 0:c4152c628df5 59 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 60 }
sPymbed 0:c4152c628df5 61
sPymbed 0:c4152c628df5 62 if (ret == WS_SUCCESS) {
sPymbed 0:c4152c628df5 63 RsaKey key;
sPymbed 0:c4152c628df5 64
sPymbed 0:c4152c628df5 65 if (wc_InitRsaKey(&key, NULL) != 0)
sPymbed 0:c4152c628df5 66 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 67
sPymbed 0:c4152c628df5 68 if (ret == WS_SUCCESS) {
sPymbed 0:c4152c628df5 69 if (wc_MakeRsaKey(&key, size, e, &rng) != 0) {
sPymbed 0:c4152c628df5 70 WLOG(WS_LOG_DEBUG, "RSA key generation failed");
sPymbed 0:c4152c628df5 71 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 72 }
sPymbed 0:c4152c628df5 73 }
sPymbed 0:c4152c628df5 74
sPymbed 0:c4152c628df5 75 if (ret == WS_SUCCESS) {
sPymbed 0:c4152c628df5 76 int keySz;
sPymbed 0:c4152c628df5 77
sPymbed 0:c4152c628df5 78 keySz = wc_RsaKeyToDer(&key, out, outSz);
sPymbed 0:c4152c628df5 79 if (keySz < 0) {
sPymbed 0:c4152c628df5 80 WLOG(WS_LOG_DEBUG, "RSA key to DER failed");
sPymbed 0:c4152c628df5 81 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 82 }
sPymbed 0:c4152c628df5 83 else
sPymbed 0:c4152c628df5 84 ret = keySz;
sPymbed 0:c4152c628df5 85 }
sPymbed 0:c4152c628df5 86
sPymbed 0:c4152c628df5 87 if (wc_FreeRsaKey(&key) != 0) {
sPymbed 0:c4152c628df5 88 WLOG(WS_LOG_DEBUG, "RSA key free failed");
sPymbed 0:c4152c628df5 89 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 90 }
sPymbed 0:c4152c628df5 91
sPymbed 0:c4152c628df5 92 if (wc_FreeRng(&rng) != 0) {
sPymbed 0:c4152c628df5 93 WLOG(WS_LOG_DEBUG, "Couldn't free RNG");
sPymbed 0:c4152c628df5 94 ret = WS_CRYPTO_FAILED;
sPymbed 0:c4152c628df5 95 }
sPymbed 0:c4152c628df5 96 }
sPymbed 0:c4152c628df5 97
sPymbed 0:c4152c628df5 98 WLOG(WS_LOG_DEBUG, "Leaving wolfSSH_MakeRsaKey(), ret = %d", ret);
sPymbed 0:c4152c628df5 99 return ret;
sPymbed 0:c4152c628df5 100 }
sPymbed 0:c4152c628df5 101
sPymbed 0:c4152c628df5 102 #endif