1 /* 2 * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <string.h> 12 #include <sys/types.h> 13 #include "apps.h" 14 #include "progs.h" 15 #include <openssl/err.h> 16 #include <openssl/evp.h> 17 #include <openssl/x509.h> 18 #include <openssl/pkcs7.h> 19 #include <openssl/pem.h> 20 #include <openssl/objects.h> 21 22 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile); 23 24 typedef enum OPTION_choice { 25 OPT_COMMON, 26 OPT_INFORM, 27 OPT_OUTFORM, 28 OPT_IN, 29 OPT_OUT, 30 OPT_NOCRL, 31 OPT_CERTFILE, 32 OPT_PROV_ENUM 33 } OPTION_CHOICE; 34 35 const OPTIONS crl2pkcs7_options[] = { 36 OPT_SECTION("General"), 37 { "help", OPT_HELP, '-', "Display this summary" }, 38 39 OPT_SECTION("Input"), 40 { "in", OPT_IN, '<', "Input file" }, 41 { "inform", OPT_INFORM, 'F', "Input format - DER or PEM" }, 42 { "nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'" }, 43 { "certfile", OPT_CERTFILE, '<', 44 "File of chain of certs to a trusted CA; can be repeated" }, 45 46 OPT_SECTION("Output"), 47 { "out", OPT_OUT, '>', "Output file" }, 48 { "outform", OPT_OUTFORM, 'F', "Output format - DER or PEM" }, 49 50 OPT_PROV_OPTIONS, 51 { NULL } 52 }; 53 54 int crl2pkcs7_main(int argc, char **argv) 55 { 56 BIO *in = NULL, *out = NULL; 57 PKCS7 *p7 = NULL; 58 PKCS7_SIGNED *p7s = NULL; 59 STACK_OF(OPENSSL_STRING) *certflst = NULL; 60 STACK_OF(X509) *cert_stack = NULL; 61 STACK_OF(X509_CRL) *crl_stack = NULL; 62 X509_CRL *crl = NULL; 63 char *infile = NULL, *outfile = NULL, *prog, *certfile; 64 int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl = 0; 65 OPTION_CHOICE o; 66 67 prog = opt_init(argc, argv, crl2pkcs7_options); 68 while ((o = opt_next()) != OPT_EOF) { 69 switch (o) { 70 case OPT_EOF: 71 case OPT_ERR: 72 opthelp: 73 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 74 goto end; 75 case OPT_HELP: 76 opt_help(crl2pkcs7_options); 77 ret = 0; 78 goto end; 79 case OPT_INFORM: 80 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) 81 goto opthelp; 82 break; 83 case OPT_OUTFORM: 84 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) 85 goto opthelp; 86 break; 87 case OPT_IN: 88 infile = opt_arg(); 89 break; 90 case OPT_OUT: 91 outfile = opt_arg(); 92 break; 93 case OPT_NOCRL: 94 nocrl = 1; 95 break; 96 case OPT_CERTFILE: 97 if ((certflst == NULL) 98 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL) 99 goto end; 100 if (!sk_OPENSSL_STRING_push(certflst, opt_arg())) 101 goto end; 102 break; 103 case OPT_PROV_CASES: 104 if (!opt_provider(o)) 105 goto end; 106 break; 107 } 108 } 109 110 /* No remaining args. */ 111 if (!opt_check_rest_arg(NULL)) 112 goto opthelp; 113 114 if (!nocrl) { 115 in = bio_open_default(infile, 'r', informat); 116 if (in == NULL) 117 goto end; 118 119 if (informat == FORMAT_ASN1) 120 crl = d2i_X509_CRL_bio(in, NULL); 121 else if (informat == FORMAT_PEM) 122 crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL); 123 if (crl == NULL) { 124 BIO_printf(bio_err, "unable to load CRL\n"); 125 ERR_print_errors(bio_err); 126 goto end; 127 } 128 } 129 130 if ((p7 = PKCS7_new()) == NULL) 131 goto end; 132 if ((p7s = PKCS7_SIGNED_new()) == NULL) 133 goto end; 134 p7->type = OBJ_nid2obj(NID_pkcs7_signed); 135 p7->d.sign = p7s; 136 p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data); 137 138 if (!ASN1_INTEGER_set(p7s->version, 1)) 139 goto end; 140 141 if (crl != NULL) { 142 if ((crl_stack = sk_X509_CRL_new_null()) == NULL) 143 goto end; 144 p7s->crl = crl_stack; 145 146 if (!sk_X509_CRL_push(crl_stack, crl)) 147 goto end; 148 crl = NULL; /* now part of p7 for OPENSSL_freeing */ 149 } 150 151 if (certflst != NULL) { 152 if ((cert_stack = sk_X509_new_null()) == NULL) 153 goto end; 154 p7s->cert = cert_stack; 155 156 for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) { 157 certfile = sk_OPENSSL_STRING_value(certflst, i); 158 if (add_certs_from_file(cert_stack, certfile) < 0) { 159 BIO_printf(bio_err, "error loading certificates\n"); 160 ERR_print_errors(bio_err); 161 goto end; 162 } 163 } 164 } 165 166 out = bio_open_default(outfile, 'w', outformat); 167 if (out == NULL) 168 goto end; 169 170 if (outformat == FORMAT_ASN1) 171 i = i2d_PKCS7_bio(out, p7); 172 else if (outformat == FORMAT_PEM) 173 i = PEM_write_bio_PKCS7(out, p7); 174 if (!i) { 175 BIO_printf(bio_err, "unable to write pkcs7 object\n"); 176 ERR_print_errors(bio_err); 177 goto end; 178 } 179 ret = 0; 180 end: 181 sk_OPENSSL_STRING_free(certflst); 182 BIO_free(in); 183 BIO_free_all(out); 184 PKCS7_free(p7); 185 X509_CRL_free(crl); 186 187 return ret; 188 } 189 190 /*- 191 *---------------------------------------------------------------------- 192 * int add_certs_from_file 193 * 194 * Read a list of certificates to be checked from a file. 195 * 196 * Results: 197 * number of certs added if successful, -1 if not. 198 *---------------------------------------------------------------------- 199 */ 200 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile) 201 { 202 BIO *in = NULL; 203 int count = 0; 204 int ret = -1; 205 STACK_OF(X509_INFO) *sk = NULL; 206 X509_INFO *xi; 207 208 in = BIO_new_file(certfile, "r"); 209 if (in == NULL) { 210 BIO_printf(bio_err, "error opening the file, %s\n", certfile); 211 goto end; 212 } 213 214 /* This loads from a file, a stack of x509/crl/pkey sets */ 215 sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL); 216 if (sk == NULL) { 217 BIO_printf(bio_err, "error reading the file, %s\n", certfile); 218 goto end; 219 } 220 221 /* scan over it and pull out the CRL's */ 222 while (sk_X509_INFO_num(sk)) { 223 xi = sk_X509_INFO_shift(sk); 224 if (xi->x509 != NULL) { 225 if (!sk_X509_push(stack, xi->x509)) { 226 X509_INFO_free(xi); 227 goto end; 228 } 229 xi->x509 = NULL; 230 count++; 231 } 232 X509_INFO_free(xi); 233 } 234 235 ret = count; 236 end: 237 /* never need to OPENSSL_free x */ 238 BIO_free(in); 239 sk_X509_INFO_free(sk); 240 return ret; 241 } 242