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crl2pkcs7.c 6.4 KB

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