Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <getopt.h> |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include <openssl/conf.h> |
| 37 | #include <openssl/evp.h> |
| 38 | #include <openssl/pem.h> |
| 39 | |
| 40 | #include "cert.h" |
| 41 | #include "debug.h" |
| 42 | #include "key.h" |
| 43 | #include "platform_oid.h" |
| 44 | #include "sha.h" |
| 45 | |
| 46 | #define MAX_FILENAME_LEN 1024 |
| 47 | |
| 48 | /* |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 49 | * Create a new key container |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 50 | */ |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 51 | static int key_new(key_t *key) |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 52 | { |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 53 | /* Create key pair container */ |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 54 | key->key = EVP_PKEY_new(); |
| 55 | if (key->key == NULL) { |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 56 | return 0; |
| 57 | } |
| 58 | |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 59 | return 1; |
| 60 | } |
| 61 | |
| 62 | int key_create(key_t *key, int type) |
| 63 | { |
| 64 | RSA *rsa = NULL; |
| 65 | EC_KEY *ec = NULL; |
| 66 | |
| 67 | /* Create OpenSSL key container */ |
| 68 | if (!key_new(key)) { |
| 69 | goto err; |
| 70 | } |
| 71 | |
| 72 | switch (type) { |
| 73 | case KEY_ALG_RSA: |
| 74 | /* Generate a new RSA key */ |
| 75 | rsa = RSA_generate_key(RSA_KEY_BITS, RSA_F4, NULL, NULL); |
| 76 | if (rsa == NULL) { |
| 77 | printf("Cannot create RSA key\n"); |
| 78 | goto err; |
| 79 | } |
| 80 | if (!EVP_PKEY_assign_RSA(key->key, rsa)) { |
| 81 | printf("Cannot assign RSA key\n"); |
| 82 | goto err; |
| 83 | } |
| 84 | break; |
| 85 | case KEY_ALG_ECDSA: |
| 86 | /* Generate a new ECDSA key */ |
| 87 | ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); |
| 88 | if (ec == NULL) { |
| 89 | printf("Cannot create EC key\n"); |
| 90 | goto err; |
| 91 | } |
| 92 | if (!EC_KEY_generate_key(ec)) { |
| 93 | printf("Cannot generate EC key\n"); |
| 94 | goto err; |
| 95 | } |
| 96 | EC_KEY_set_flags(ec, EC_PKEY_NO_PARAMETERS); |
| 97 | EC_KEY_set_asn1_flag(ec, OPENSSL_EC_NAMED_CURVE); |
| 98 | if (!EVP_PKEY_assign_EC_KEY(key->key, ec)) { |
| 99 | printf("Cannot assign EC key\n"); |
| 100 | goto err; |
| 101 | } |
| 102 | break; |
| 103 | default: |
| 104 | goto err; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 105 | } |
| 106 | |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 107 | return 1; |
| 108 | |
| 109 | err: |
| 110 | RSA_free(rsa); |
| 111 | EC_KEY_free(ec); |
| 112 | |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 113 | return 0; |
| 114 | } |
| 115 | |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 116 | int key_load(key_t *key, unsigned int *err_code) |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 117 | { |
| 118 | FILE *fp = NULL; |
| 119 | EVP_PKEY *k = NULL; |
| 120 | |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 121 | /* Create OpenSSL key container */ |
| 122 | if (!key_new(key)) { |
| 123 | *err_code = KEY_ERR_MALLOC; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | if (key->fn) { |
| 128 | /* Load key from file */ |
| 129 | fp = fopen(key->fn, "r"); |
| 130 | if (fp) { |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 131 | k = PEM_read_PrivateKey(fp, &key->key, NULL, NULL); |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 132 | fclose(fp); |
| 133 | if (k) { |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 134 | *err_code = KEY_ERR_NONE; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 135 | return 1; |
| 136 | } else { |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 137 | ERROR("Cannot load key from %s\n", key->fn); |
| 138 | *err_code = KEY_ERR_LOAD; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 139 | } |
| 140 | } else { |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 141 | WARN("Cannot open file %s\n", key->fn); |
| 142 | *err_code = KEY_ERR_OPEN; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 143 | } |
| 144 | } else { |
Juan Castillo | f9f39c3 | 2015-06-01 16:34:23 +0100 | [diff] [blame^] | 145 | WARN("Key filename not specified\n"); |
| 146 | *err_code = KEY_ERR_FILENAME; |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 147 | } |
| 148 | |
Juan Castillo | 11abdcd | 2014-10-21 11:30:42 +0100 | [diff] [blame] | 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | int key_store(key_t *key) |
| 153 | { |
| 154 | FILE *fp = NULL; |
| 155 | |
| 156 | if (key->fn) { |
| 157 | fp = fopen(key->fn, "w"); |
| 158 | if (fp) { |
| 159 | PEM_write_PrivateKey(fp, key->key, |
| 160 | NULL, NULL, 0, NULL, NULL); |
| 161 | fclose(fp); |
| 162 | return 1; |
| 163 | } else { |
| 164 | ERROR("Cannot create file %s\n", key->fn); |
| 165 | } |
| 166 | } else { |
| 167 | ERROR("Key filename not specified\n"); |
| 168 | } |
| 169 | |
| 170 | return 0; |
| 171 | } |