yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013-2017 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (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 | /* |
| 11 | * A minimal program to serve an SSL connection. It uses blocking. It uses |
| 12 | * the SSL_CONF API with a configuration file. cc -I../../include saccept.c |
| 13 | * -L../.. -lssl -lcrypto -ldl |
| 14 | */ |
| 15 | |
| 16 | #include <stdio.h> |
| 17 | #include <string.h> |
| 18 | #include <signal.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <openssl/err.h> |
| 21 | #include <openssl/ssl.h> |
| 22 | #include <openssl/conf.h> |
| 23 | |
| 24 | int main(int argc, char *argv[]) |
| 25 | { |
| 26 | char *port = "*:4433"; |
| 27 | BIO *in = NULL; |
| 28 | BIO *ssl_bio, *tmp; |
| 29 | SSL_CTX *ctx; |
| 30 | SSL_CONF_CTX *cctx = NULL; |
| 31 | CONF *conf = NULL; |
| 32 | STACK_OF(CONF_VALUE) *sect = NULL; |
| 33 | CONF_VALUE *cnf; |
| 34 | long errline = -1; |
| 35 | char buf[512]; |
| 36 | int ret = EXIT_FAILURE, i; |
| 37 | |
| 38 | ctx = SSL_CTX_new(TLS_server_method()); |
| 39 | |
| 40 | conf = NCONF_new(NULL); |
| 41 | |
| 42 | if (NCONF_load(conf, "accept.cnf", &errline) <= 0) { |
| 43 | if (errline <= 0) |
| 44 | fprintf(stderr, "Error processing config file\n"); |
| 45 | else |
| 46 | fprintf(stderr, "Error on line %ld\n", errline); |
| 47 | goto err; |
| 48 | } |
| 49 | |
| 50 | sect = NCONF_get_section(conf, "default"); |
| 51 | |
| 52 | if (sect == NULL) { |
| 53 | fprintf(stderr, "Error retrieving default section\n"); |
| 54 | goto err; |
| 55 | } |
| 56 | |
| 57 | cctx = SSL_CONF_CTX_new(); |
| 58 | SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER); |
| 59 | SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE); |
| 60 | SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE); |
| 61 | SSL_CONF_CTX_set_ssl_ctx(cctx, ctx); |
| 62 | for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { |
| 63 | int rv; |
| 64 | cnf = sk_CONF_VALUE_value(sect, i); |
| 65 | rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value); |
| 66 | if (rv > 0) |
| 67 | continue; |
| 68 | if (rv != -2) { |
| 69 | fprintf(stderr, "Error processing %s = %s\n", |
| 70 | cnf->name, cnf->value); |
| 71 | ERR_print_errors_fp(stderr); |
| 72 | goto err; |
| 73 | } |
| 74 | if (strcmp(cnf->name, "Port") == 0) { |
| 75 | port = cnf->value; |
| 76 | } else { |
| 77 | fprintf(stderr, "Unknown configuration option %s\n", cnf->name); |
| 78 | goto err; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | if (!SSL_CONF_CTX_finish(cctx)) { |
| 83 | fprintf(stderr, "Finish error\n"); |
| 84 | ERR_print_errors_fp(stderr); |
| 85 | goto err; |
| 86 | } |
| 87 | |
| 88 | /* Setup server side SSL bio */ |
| 89 | ssl_bio = BIO_new_ssl(ctx, 0); |
| 90 | |
| 91 | if ((in = BIO_new_accept(port)) == NULL) |
| 92 | goto err; |
| 93 | |
| 94 | /* |
| 95 | * This means that when a new connection is accepted on 'in', The ssl_bio |
| 96 | * will be 'duplicated' and have the new socket BIO push into it. |
| 97 | * Basically it means the SSL BIO will be automatically setup |
| 98 | */ |
| 99 | BIO_set_accept_bios(in, ssl_bio); |
| 100 | |
| 101 | again: |
| 102 | /* |
| 103 | * The first call will setup the accept socket, and the second will get a |
| 104 | * socket. In this loop, the first actual accept will occur in the |
| 105 | * BIO_read() function. |
| 106 | */ |
| 107 | |
| 108 | if (BIO_do_accept(in) <= 0) |
| 109 | goto err; |
| 110 | |
| 111 | for (;;) { |
| 112 | i = BIO_read(in, buf, 512); |
| 113 | if (i == 0) { |
| 114 | /* |
| 115 | * If we have finished, remove the underlying BIO stack so the |
| 116 | * next time we call any function for this BIO, it will attempt |
| 117 | * to do an accept |
| 118 | */ |
| 119 | printf("Done\n"); |
| 120 | tmp = BIO_pop(in); |
| 121 | BIO_free_all(tmp); |
| 122 | goto again; |
| 123 | } |
| 124 | if (i < 0) { |
| 125 | if (BIO_should_retry(in)) |
| 126 | continue; |
| 127 | goto err; |
| 128 | } |
| 129 | fwrite(buf, 1, i, stdout); |
| 130 | fflush(stdout); |
| 131 | } |
| 132 | |
| 133 | ret = EXIT_SUCCESS; |
| 134 | err: |
| 135 | if (ret != EXIT_SUCCESS) |
| 136 | ERR_print_errors_fp(stderr); |
| 137 | BIO_free(in); |
| 138 | return ret; |
| 139 | } |