client-arg.c 2.9 KB

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  1. /*
  2. * Copyright 2013-2021 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 <string.h>
  10. #include <openssl/err.h>
  11. #include <openssl/ssl.h>
  12. int main(int argc, char **argv)
  13. {
  14. BIO *sbio = NULL, *out = NULL;
  15. int len;
  16. char tmpbuf[1024];
  17. SSL_CTX *ctx;
  18. SSL_CONF_CTX *cctx;
  19. SSL *ssl;
  20. char **args = argv + 1;
  21. const char *connect_str = "localhost:4433";
  22. int nargs = argc - 1;
  23. ctx = SSL_CTX_new(TLS_client_method());
  24. cctx = SSL_CONF_CTX_new();
  25. SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
  26. SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
  27. while (*args && **args == '-') {
  28. int rv;
  29. /* Parse standard arguments */
  30. rv = SSL_CONF_cmd_argv(cctx, &nargs, &args);
  31. if (rv == -3) {
  32. fprintf(stderr, "Missing argument for %s\n", *args);
  33. goto end;
  34. }
  35. if (rv < 0) {
  36. fprintf(stderr, "Error in command %s\n", *args);
  37. ERR_print_errors_fp(stderr);
  38. goto end;
  39. }
  40. /* If rv > 0 we processed something so proceed to next arg */
  41. if (rv > 0)
  42. continue;
  43. /* Otherwise application specific argument processing */
  44. if (strcmp(*args, "-connect") == 0) {
  45. connect_str = args[1];
  46. if (connect_str == NULL) {
  47. fprintf(stderr, "Missing -connect argument\n");
  48. goto end;
  49. }
  50. args += 2;
  51. nargs -= 2;
  52. continue;
  53. } else {
  54. fprintf(stderr, "Unknown argument %s\n", *args);
  55. goto end;
  56. }
  57. }
  58. if (!SSL_CONF_CTX_finish(cctx)) {
  59. fprintf(stderr, "Finish error\n");
  60. ERR_print_errors_fp(stderr);
  61. goto end;
  62. }
  63. /*
  64. * We'd normally set some stuff like the verify paths and * mode here
  65. * because as things stand this will connect to * any server whose
  66. * certificate is signed by any CA.
  67. */
  68. sbio = BIO_new_ssl_connect(ctx);
  69. BIO_get_ssl(sbio, &ssl);
  70. if (!ssl) {
  71. fprintf(stderr, "Can't locate SSL pointer\n");
  72. goto end;
  73. }
  74. /* We might want to do other things with ssl here */
  75. BIO_set_conn_hostname(sbio, connect_str);
  76. out = BIO_new_fp(stdout, BIO_NOCLOSE);
  77. if (BIO_do_connect(sbio) <= 0) {
  78. fprintf(stderr, "Error connecting to server\n");
  79. ERR_print_errors_fp(stderr);
  80. goto end;
  81. }
  82. /* Could examine ssl here to get connection info */
  83. BIO_puts(sbio, "GET / HTTP/1.0\n\n");
  84. for (;;) {
  85. len = BIO_read(sbio, tmpbuf, 1024);
  86. if (len <= 0)
  87. break;
  88. BIO_write(out, tmpbuf, len);
  89. }
  90. end:
  91. SSL_CONF_CTX_free(cctx);
  92. BIO_free_all(sbio);
  93. BIO_free(out);
  94. return 0;
  95. }