| 1 | /* |
| 2 | * px5g - Embedded x509 key and certificate generator based on PolarSSL |
| 3 | * |
| 4 | * Copyright (C) 2009 Steven Barth <steven@midlink.org> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License, version 2.1 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 18 | * MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <time.h> |
| 25 | #include "polarssl/havege.h" |
| 26 | #include "polarssl/bignum.h" |
| 27 | #include "polarssl/x509.h" |
| 28 | #include "polarssl/rsa.h" |
| 29 | |
| 30 | #define PX5G_VERSION "0.1" |
| 31 | #define PX5G_COPY "Copyright (c) 2009 Steven Barth <steven@midlink.org>" |
| 32 | #define PX5G_LICENSE "Licensed under the GNU Lesser General Public License v2.1" |
| 33 | |
| 34 | int rsakey(char **arg) { |
| 35 | havege_state hs; |
| 36 | rsa_context rsa; |
| 37 | |
| 38 | unsigned int ksize = 512; |
| 39 | int exp = 65537; |
| 40 | char *path = NULL; |
| 41 | int flag = X509_OUTPUT_PEM; |
| 42 | |
| 43 | while (*arg && **arg == '-') { |
| 44 | if (!strcmp(*arg, "-out") && arg[1]) { |
| 45 | path = arg[1]; |
| 46 | arg++; |
| 47 | } else if (!strcmp(*arg, "-3")) { |
| 48 | exp = 3; |
| 49 | } else if (!strcmp(*arg, "-der")) { |
| 50 | flag = X509_OUTPUT_DER; |
| 51 | } |
| 52 | arg++; |
| 53 | } |
| 54 | |
| 55 | if (*arg) { |
| 56 | ksize = (unsigned int)atoi(*arg); |
| 57 | } |
| 58 | |
| 59 | havege_init(&hs); |
| 60 | rsa_init(&rsa, RSA_PKCS_V15, 0, havege_rand, &hs); |
| 61 | |
| 62 | fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize); |
| 63 | if (rsa_gen_key(&rsa, ksize, exp)) { |
| 64 | fprintf(stderr, "error: key generation failed\n"); |
| 65 | return 1; |
| 66 | } |
| 67 | |
| 68 | if (x509write_keyfile(&rsa, path, flag)) { |
| 69 | fprintf(stderr, "error: I/O error\n"); |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | rsa_free(&rsa); |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | int selfsigned(char **arg) { |
| 78 | havege_state hs; |
| 79 | rsa_context rsa; |
| 80 | x509_node node; |
| 81 | |
| 82 | char *subject = ""; |
| 83 | unsigned int ksize = 512; |
| 84 | int exp = 65537; |
| 85 | unsigned int days = 30; |
| 86 | char *keypath = NULL, *certpath = NULL; |
| 87 | int flag = X509_OUTPUT_PEM; |
| 88 | time_t from = time(NULL), to; |
| 89 | char fstr[20], tstr[20]; |
| 90 | |
| 91 | while (*arg && **arg == '-') { |
| 92 | if (!strcmp(*arg, "-der")) { |
| 93 | flag = X509_OUTPUT_DER; |
| 94 | } else if (!strcmp(*arg, "-newkey") && arg[1]) { |
| 95 | if (strncmp(arg[1], "rsa:", 4)) { |
| 96 | fprintf(stderr, "error: invalid algorithm"); |
| 97 | return 1; |
| 98 | } |
| 99 | ksize = (unsigned int)atoi(arg[1] + 4); |
| 100 | arg++; |
| 101 | } else if (!strcmp(*arg, "-days") && arg[1]) { |
| 102 | days = (unsigned int)atoi(arg[1]); |
| 103 | arg++; |
| 104 | } else if (!strcmp(*arg, "-keyout") && arg[1]) { |
| 105 | keypath = arg[1]; |
| 106 | arg++; |
| 107 | } else if (!strcmp(*arg, "-out") && arg[1]) { |
| 108 | certpath = arg[1]; |
| 109 | arg++; |
| 110 | } else if (!strcmp(*arg, "-subj") && arg[1]) { |
| 111 | if (arg[1][0] != '/' || strchr(arg[1], ';')) { |
| 112 | fprintf(stderr, "error: invalid subject"); |
| 113 | return 1; |
| 114 | } |
| 115 | subject = calloc(strlen(arg[1]) + 1, 1); |
| 116 | char *oldc = arg[1] + 1, *newc = subject, *delim; |
| 117 | do { |
| 118 | delim = strchr(oldc, '='); |
| 119 | if (!delim) { |
| 120 | fprintf(stderr, "error: invalid subject"); |
| 121 | return 1; |
| 122 | } |
| 123 | memcpy(newc, oldc, delim - oldc + 1); |
| 124 | newc += delim - oldc + 1; |
| 125 | oldc = delim + 1; |
| 126 | |
| 127 | delim = strchr(oldc, '/'); |
| 128 | if (!delim) { |
| 129 | delim = arg[1] + strlen(arg[1]); |
| 130 | } |
| 131 | memcpy(newc, oldc, delim - oldc); |
| 132 | newc += delim - oldc; |
| 133 | *newc++ = ';'; |
| 134 | oldc = delim + 1; |
| 135 | } while(*delim); |
| 136 | arg++; |
| 137 | } |
| 138 | arg++; |
| 139 | } |
| 140 | |
| 141 | havege_init(&hs); |
| 142 | rsa_init(&rsa, RSA_PKCS_V15, 0, havege_rand, &hs); |
| 143 | x509write_init_node(&node); |
| 144 | fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize); |
| 145 | if (rsa_gen_key(&rsa, ksize, exp)) { |
| 146 | fprintf(stderr, "error: key generation failed\n"); |
| 147 | return 1; |
| 148 | } |
| 149 | |
| 150 | if (keypath) { |
| 151 | if (x509write_keyfile(&rsa, keypath, flag)) { |
| 152 | fprintf(stderr, "error: I/O error\n"); |
| 153 | return 1; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | from = (from < 1000000000) ? 1000000000 : from; |
| 158 | strftime(fstr, sizeof(fstr), "%F %H:%M:%S", gmtime(&from)); |
| 159 | to = from + 60 * 60 * 24 * days; |
| 160 | strftime(tstr, sizeof(tstr), "%F %H:%M:%S", gmtime(&to)); |
| 161 | |
| 162 | x509_raw cert; |
| 163 | x509write_init_raw(&cert); |
| 164 | x509write_add_pubkey(&cert, &rsa); |
| 165 | x509write_add_subject(&cert, (unsigned char*)subject); |
| 166 | x509write_add_validity(&cert, (unsigned char*)fstr, (unsigned char*)tstr); |
| 167 | fprintf(stderr, "Generating selfsigned certificate with subject '%s'" |
| 168 | " and validity %s-%s\n", subject, fstr, tstr); |
| 169 | if (x509write_create_selfsign(&cert, &rsa)) { |
| 170 | fprintf(stderr, "error: certificate generation failed\n"); |
| 171 | } |
| 172 | |
| 173 | if (x509write_crtfile(&cert, (unsigned char*)certpath, flag)) { |
| 174 | fprintf(stderr, "error: I/O error\n"); |
| 175 | return 1; |
| 176 | } |
| 177 | |
| 178 | x509write_free_raw(&cert); |
| 179 | rsa_free(&rsa); |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | int main(int argc, char *argv[]) { |
| 184 | if (!argv[1]) { |
| 185 | //Usage |
| 186 | } else if (!strcmp(argv[1], "rsakey")) { |
| 187 | return rsakey(argv+2); |
| 188 | } else if (!strcmp(argv[1], "selfsigned")) { |
| 189 | return selfsigned(argv+2); |
| 190 | } |
| 191 | |
| 192 | fprintf(stderr, |
| 193 | "PX5G X.509 Certificate Generator Utility v" PX5G_VERSION "\n" PX5G_COPY |
| 194 | "\nbased on PolarSSL by Christophe Devine and Paul Bakker\n\n"); |
| 195 | fprintf(stderr, "Usage: %s [rsakey|selfsigned]\n", *argv); |
| 196 | return 1; |
| 197 | } |
| 198 | |
