1 /* 2 * Copyright 1995-2021 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, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOCRL, OPT_CERTFILE, 27 OPT_PROV_ENUM 28 } OPTION_CHOICE; 29 30 const OPTIONS crl2pkcs7_options[] = { 31 OPT_SECTION("General"), 32 {"help", OPT_HELP, '-', "Display this summary"}, 33 34 OPT_SECTION("Input"), 35 {"in", OPT_IN, '<', "Input file"}, 36 {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"}, 37 {"nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'"}, 38 {"certfile", OPT_CERTFILE, '<', 39 "File of chain of certs to a trusted CA; can be repeated"}, 40 41 OPT_SECTION("Output"), 42 {"out", OPT_OUT, '>', "Output file"}, 43 {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"}, 44 45 OPT_PROV_OPTIONS, 46 {NULL} 47 }; 48 49 int crl2pkcs7_main(int argc, char **argv) 50 { 51 BIO *in = NULL, *out = NULL; 52 PKCS7 *p7 = NULL; 53 PKCS7_SIGNED *p7s = NULL; 54 STACK_OF(OPENSSL_STRING) *certflst = NULL; 55 STACK_OF(X509) *cert_stack = NULL; 56 STACK_OF(X509_CRL) *crl_stack = NULL; 57 X509_CRL *crl = NULL; 58 char *infile = NULL, *outfile = NULL, *prog, *certfile; 59 int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl = 60 0; 61 OPTION_CHOICE o; 62 63 prog = opt_init(argc, argv, crl2pkcs7_options); 64 while ((o = opt_next()) != OPT_EOF) { 65 switch (o) { 66 case OPT_EOF: 67 case OPT_ERR: 68 opthelp: 69 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 70 goto end; 71 case OPT_HELP: 72 opt_help(crl2pkcs7_options); 73 ret = 0; 74 goto end; 75 case OPT_INFORM: 76 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) 77 goto opthelp; 78 break; 79 case OPT_OUTFORM: 80 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) 81 goto opthelp; 82 break; 83 case OPT_IN: 84 infile = opt_arg(); 85 break; 86 case OPT_OUT: 87 outfile = opt_arg(); 88 break; 89 case OPT_NOCRL: 90 nocrl = 1; 91 break; 92 case OPT_CERTFILE: 93 if ((certflst == NULL) 94 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL) 95 goto end; 96 if (!sk_OPENSSL_STRING_push(certflst, opt_arg())) 97 goto end; 98 break; 99 case OPT_PROV_CASES: 100 if (!opt_provider(o)) 101 goto end; 102 break; 103 } 104 } 105 106 /* No remaining args. */ 107 argc = opt_num_rest(); 108 if (argc != 0) 109 goto opthelp; 110 111 if (!nocrl) { 112 in = bio_open_default(infile, 'r', informat); 113 if (in == NULL) 114 goto end; 115 116 if (informat == FORMAT_ASN1) 117 crl = d2i_X509_CRL_bio(in, NULL); 118 else if (informat == FORMAT_PEM) 119 crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL); 120 if (crl == NULL) { 121 BIO_printf(bio_err, "unable to load CRL\n"); 122 ERR_print_errors(bio_err); 123 goto end; 124 } 125 } 126 127 if ((p7 = PKCS7_new()) == NULL) 128 goto end; 129 if ((p7s = PKCS7_SIGNED_new()) == NULL) 130 goto end; 131 p7->type = OBJ_nid2obj(NID_pkcs7_signed); 132 p7->d.sign = p7s; 133 p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data); 134 135 if (!ASN1_INTEGER_set(p7s->version, 1)) 136 goto end; 137 138 if (crl != NULL) { 139 if ((crl_stack = sk_X509_CRL_new_null()) == NULL) 140 goto end; 141 p7s->crl = crl_stack; 142 sk_X509_CRL_push(crl_stack, crl); 143 crl = NULL; /* now part of p7 for OPENSSL_freeing */ 144 } 145 146 if (certflst != NULL) { 147 if ((cert_stack = sk_X509_new_null()) == NULL) 148 goto end; 149 p7s->cert = cert_stack; 150 151 for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) { 152 certfile = sk_OPENSSL_STRING_value(certflst, i); 153 if (add_certs_from_file(cert_stack, certfile) < 0) { 154 BIO_printf(bio_err, "error loading certificates\n"); 155 ERR_print_errors(bio_err); 156 goto end; 157 } 158 } 159 } 160 161 out = bio_open_default(outfile, 'w', outformat); 162 if (out == NULL) 163 goto end; 164 165 if (outformat == FORMAT_ASN1) 166 i = i2d_PKCS7_bio(out, p7); 167 else if (outformat == FORMAT_PEM) 168 i = PEM_write_bio_PKCS7(out, p7); 169 if (!i) { 170 BIO_printf(bio_err, "unable to write pkcs7 object\n"); 171 ERR_print_errors(bio_err); 172 goto end; 173 } 174 ret = 0; 175 end: 176 sk_OPENSSL_STRING_free(certflst); 177 BIO_free(in); 178 BIO_free_all(out); 179 PKCS7_free(p7); 180 X509_CRL_free(crl); 181 182 return ret; 183 } 184 185 /*- 186 *---------------------------------------------------------------------- 187 * int add_certs_from_file 188 * 189 * Read a list of certificates to be checked from a file. 190 * 191 * Results: 192 * number of certs added if successful, -1 if not. 193 *---------------------------------------------------------------------- 194 */ 195 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile) 196 { 197 BIO *in = NULL; 198 int count = 0; 199 int ret = -1; 200 STACK_OF(X509_INFO) *sk = NULL; 201 X509_INFO *xi; 202 203 in = BIO_new_file(certfile, "r"); 204 if (in == NULL) { 205 BIO_printf(bio_err, "error opening the file, %s\n", certfile); 206 goto end; 207 } 208 209 /* This loads from a file, a stack of x509/crl/pkey sets */ 210 sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL); 211 if (sk == NULL) { 212 BIO_printf(bio_err, "error reading the file, %s\n", certfile); 213 goto end; 214 } 215 216 /* scan over it and pull out the CRL's */ 217 while (sk_X509_INFO_num(sk)) { 218 xi = sk_X509_INFO_shift(sk); 219 if (xi->x509 != NULL) { 220 sk_X509_push(stack, xi->x509); 221 xi->x509 = NULL; 222 count++; 223 } 224 X509_INFO_free(xi); 225 } 226 227 ret = count; 228 end: 229 /* never need to OPENSSL_free x */ 230 BIO_free(in); 231 sk_X509_INFO_free(sk); 232 return ret; 233 } 234