diff options
author | bobwirka <bobwirka@yahoo.com> | 2021-12-12 14:53:13 -0500 |
---|---|---|
committer | Matt Caswell <matt@openssl.org> | 2022-04-12 15:12:57 +0100 |
commit | 801c638c50406c93d683c1ab8bd1d430cff4b6d0 (patch) | |
tree | c380a5ff188debc8bb7b89d3ebb8a67246bc3e9d /demos | |
parent | cb629550cdab518c925e9b402e11b86497a03845 (diff) | |
download | openssl-801c638c50406c93d683c1ab8bd1d430cff4b6d0.tar.gz |
Added Simple SSL Echo Client/Server to demos.
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17260)
Diffstat (limited to 'demos')
-rw-r--r-- | demos/README.txt | 3 | ||||
-rw-r--r-- | demos/sslecho/A-SSL-Docs.txt | 20 | ||||
-rw-r--r-- | demos/sslecho/README.md | 26 | ||||
-rw-r--r-- | demos/sslecho/cert.pem | 32 | ||||
-rw-r--r-- | demos/sslecho/key.pem | 52 | ||||
-rw-r--r-- | demos/sslecho/main.c | 340 | ||||
-rw-r--r-- | demos/sslecho/makefile | 12 |
7 files changed, 485 insertions, 0 deletions
diff --git a/demos/README.txt b/demos/README.txt index 650529572c..a4b8be0fe3 100644 --- a/demos/README.txt +++ b/demos/README.txt @@ -50,3 +50,6 @@ signature: EVP_Signature_demo.c Compute and verify a signature from multiple buffers rsa_pss_direct.c Compute and verify an RSA-PSS signature from a hash rsa_pss_hash.c Compute and verify an RSA-PSS signature over a buffer + +sslecho: +main.c Simple SSL echo client/server. diff --git a/demos/sslecho/A-SSL-Docs.txt b/demos/sslecho/A-SSL-Docs.txt new file mode 100644 index 0000000000..865960e4bd --- /dev/null +++ b/demos/sslecho/A-SSL-Docs.txt @@ -0,0 +1,20 @@ +Useful Links: + +OpenSSL API Documentation: https://www.openssl.org/docs + +Github: https://github.com/openssl/openssl + +OpenSSL Wiki: https://wiki.openssl.org/index.php/Main_Page + +Original Simple Server: https://wiki.openssl.org/index.php/Simple_TLS_Server + +--------------------------------------------------------------- + +Generate self signed cert and key 'pem' files (good for 10 years): + +openssl req -newkey rsa:4096 -x509 -sha256 -days 3650 -nodes -out cert.pem -keyout key.pem + +You can just hit carriage returns to accept the default values, except for "Common Name"; you +should enter 'localhost', or an actual hostname. + +The same keys can be used for both communicating instances; same or different machines. diff --git a/demos/sslecho/README.md b/demos/sslecho/README.md new file mode 100644 index 0000000000..58f7ca0724 --- /dev/null +++ b/demos/sslecho/README.md @@ -0,0 +1,26 @@ +OpenSSL Simple Echo Client/Server +================================= + +This project implements a simple echo client/server. + +It is a console application, with command line parameters determining the mode +of operation (client or server). Start it with no parameters to see usage. + +The server code was adapted from the Simple TLS Server on the OpenSSL Wiki. +The server code was modified to perform the echo function, and client code +was added to open a connection with the server and to send keyboard input +to the server. + +The new client code illustrates that: + +- Connection to the SSL server starts as a standard TCP 'connect'. +- Once connected with TCP, the client 'upgrades' to SSL using + SSL_connect(). +- When the SSL connection completes, data is sent and received using + SSL_write() and SSL_read(). +- Pretty simple. + +The cert.pem and key.pem files included are self signed certificates with the +"Common Name" of 'localhost'. + +Best to create the 'pem' files using an actual hostname. diff --git a/demos/sslecho/cert.pem b/demos/sslecho/cert.pem new file mode 100644 index 0000000000..834d46285f --- /dev/null +++ b/demos/sslecho/cert.pem @@ -0,0 +1,32 @@ +-----BEGIN CERTIFICATE----- +MIIFkzCCA3ugAwIBAgIUQJ8FQFwuVg1UlnIBam0+liL0RSQwDQYJKoZIhvcNAQEL +BQAwWTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM +GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MB4X +DTIyMDIwMjE0MzgzNloXDTMyMDEzMTE0MzgzNlowWTELMAkGA1UEBhMCQVUxEzAR +BgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5 +IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MIICIjANBgkqhkiG9w0BAQEFAAOCAg8A +MIICCgKCAgEAyPZfTbR9lVvpHxIGRzpYb1gYFjPZ7yTXYZVKEqQLVxw/O2L32ufa +lODiYJr/pKu9++9T+JrmRnonYlyl0uFta3w4rMY9PzHsT7jIZJByoFdraNz1SnxF +1UaHjzF9fjIA0/n/ZGVJDZCCYulpcVkpW14oNG4tTW5IefYUH3GxmPZ5godhWEla +6OXl3+9xkGd5yXq1O4VZbsekcVcZlznuq7blmvs3UrjrEZ5xgmCd8kNzy/E9APKY +SSGx87/U9yyiz5GAphgSNTqAfEWqpzouMv+hUm/J5NuZCXbOPYbE7zfDDauspYiY +/wdGty9ZvDy5g+fFz8sZig1OWuHqvU8QGoIfVRCxjhX3+p0/KshGDBWjLHek+8Wh +IZHmuf1LgT+gOzN3dxxVEcphSiJX0eZ/OhBelowrdabEycm2WAk3qs/tUDMbWh6V +VSH22ODLX/cBrSAY2sk2EU8Mz5Mbm6gFTcJhqOBgVn5g8/3QCAhFG3xq/2LKZ+za +itAKbaeQqyAw5G/+oc7mKCjUqSKE92n6FKZRsJrB+vfy3AQYyqJevHcIf2nbBimX +vb4/rDed/gvSOVGIXIUiUlFHgg8DoVZqMrfJ+y/xwr+Ya+AX8n6J8EB2It3W4EEf +nmosupBcZPb6U2VrtpEe/199nPj2ZXQHGLLQfw8lYjvZDghCFiP0o8cCAwEAAaNT +MFEwHQYDVR0OBBYEFDClIPCiAkevl1qh188Ycjz5IZ/DMB8GA1UdIwQYMBaAFDCl +IPCiAkevl1qh188Ycjz5IZ/DMA8GA1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQEL +BQADggIBAGQm27D74xUm1X99GbDQpgJenUIu+Bszk8qXCsPfyyQZy4H6+70uXlkC +ASf/keQjrPzrco3rBelbtlCGqqWhsCznVplrjNIntBAkLD0fU3z92SjsMvHEcBDa +Nu6aXExN9gv85EBJHNnj16hqjo8Mk+ydNQ8BtcnZa4zi7GdVh29KbPuEzeoyRnXP +xh5yHUj5Bs6hEUbirhm1WLEK8bvfWykfEJiGOQO8MHAeYK1uPFXDmswgTwJFzZyA +6LSXYbmGOnCM8yAmVXHMnXXCKd+DQFyQ0KrXDiixyTinYFtrONBkNNt/7SnCjJt5 +H3LRTNuoZvvGmaS7GxbIMemBjLdrigKicVZunEPGFRTEL7K+spmSMnpAiITStxjR +70wHEe3M9IUbJximKaxvMhXhP0VSPJGOzgG304A2MqMS7UPBDzD/pz5c7gn7ILfM +LcxzStnQcbTqqmdpNVlMv31YpOk5nel5RY3UmwKbQkix6UAo/CJmC1Q3yLU8uG5O +6j7vS8t0wOYcVTAA845JU8C7V5yy6UeCB9F2oGDgVwCe6U8bzTIoCDnkzIKO7LlS +734KP+fNK9LatNzpPQWW+1SK4XEZBNLOMePwu560GLVzPgr9ji0z83E+0yAcWrAO +4gKT+/h3Ep1Ut73daskFAvNJFFt/5Rm+xZECHrxRkXqW1AN/2eXX +-----END CERTIFICATE----- diff --git a/demos/sslecho/key.pem b/demos/sslecho/key.pem new file mode 100644 index 0000000000..75b86c3a38 --- /dev/null +++ b/demos/sslecho/key.pem @@ -0,0 +1,52 @@ +-----BEGIN PRIVATE KEY----- +MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQDI9l9NtH2VW+kf +EgZHOlhvWBgWM9nvJNdhlUoSpAtXHD87Yvfa59qU4OJgmv+kq73771P4muZGeidi +XKXS4W1rfDisxj0/MexPuMhkkHKgV2to3PVKfEXVRoePMX1+MgDT+f9kZUkNkIJi +6WlxWSlbXig0bi1Nbkh59hQfcbGY9nmCh2FYSVro5eXf73GQZ3nJerU7hVlux6Rx +VxmXOe6rtuWa+zdSuOsRnnGCYJ3yQ3PL8T0A8phJIbHzv9T3LKLPkYCmGBI1OoB8 +RaqnOi4y/6FSb8nk25kJds49hsTvN8MNq6yliJj/B0a3L1m8PLmD58XPyxmKDU5a +4eq9TxAagh9VELGOFff6nT8qyEYMFaMsd6T7xaEhkea5/UuBP6A7M3d3HFURymFK +IlfR5n86EF6WjCt1psTJybZYCTeqz+1QMxtaHpVVIfbY4Mtf9wGtIBjayTYRTwzP +kxubqAVNwmGo4GBWfmDz/dAICEUbfGr/Yspn7NqK0Aptp5CrIDDkb/6hzuYoKNSp +IoT3afoUplGwmsH69/LcBBjKol68dwh/adsGKZe9vj+sN53+C9I5UYhchSJSUUeC +DwOhVmoyt8n7L/HCv5hr4BfyfonwQHYi3dbgQR+eaiy6kFxk9vpTZWu2kR7/X32c ++PZldAcYstB/DyViO9kOCEIWI/SjxwIDAQABAoICAH51SpODOGN8ar36gajgtjWa +oc2W41TxQfdOEkaYo+o1BDVCmeVOcOWufcV8w9HDoNGgUJ7oGm/O/mmPE2oYINq6 +WI+gT3os2B9yj+d4Xik32YcrQ8+TU/5ZW4RoCCgZHxxE/MkYU1gNz36ekpOZH8U3 +AuW7Txaih0j36MHAsZknwF67Ai6kOmjEAltgOX49Hw4CAXlq+FQVnQ0VWi0nb2Du +vp0/6BhN9N4pbhQ06C9C8uMq8tBd2CZs5aYU2NaRaAJl9SaPjyWfoqqQzEpe+iNt +aP6PCeTRqwOhlzZwUAyYck1v8jxYMK6KzZ0IVtd0/uhaOMgBbhjJNr1J3IUz81Ud +gwmU7UrifjtcGiMHNmHnIAJNcbm9sY27EvsyEHz3zf90VQL8wLpYflX9kX5v8soi +WPv6On+u7ARKofHfQKmP1BfJoGY651uyI1vqdpwUds9iQk3dZWUuBf1WRzywH4t/ +Vwz/h9cEW1Pd42cjukRCoPE1kLc9vHBUEADaaQG7Y5avuLIfDFzXEmwf9YokGRcy +ULUikhhFgiL4bOiQ4cj0/c3CLFAM98iq+z1pTlGFy5msjgUTg3ouUUbbPTaxaMS5 +yVeXelleQADdpj25MTGatBkGW4WC3DYopvvSy+DZ6XarJ6gYm+/cV+eoXddQYLUd +RAQqnQFqVPUIy2rlVuQBAoIBAQDlKILSqQNPZqou6lFgo4tbFLpzUFVAnmrEUhuJ +3v9ppseKncolZ3pcr10VwIzuQZliLLvUiZ8aB+TzMeuIRBm1PkXMpSRhPsVb2bGb +QrTzzPafB8uwVwvr3YzYeRXbpdabU9UpuQMk+lD+GEx5DfowdYJMtdIBOeQdjROi +7JZnHPfNwNheEakJpCgPbulQRfrXx4Fd+npWQprcvCYhg8vnqCHrGazy5g/2dnYF +NW7L2CNHdM74SJKl8gY/YcfEQSFcir6SFWUGPOiHsVdpKX9K0his6DoiV8QPH/S0 +RIKZuNIuOmiO8ATblYksrh8UuOQWi2kywE3bF3neMmNgwoRBAoIBAQDggGL0C9Ij +n+DHlkHujbziEwe1pLVSb4x2q5KmZwA4VWDGLARbK2ypx6/LJDsUCwK6ZFHh89DU +eW9Ze6fXMi8Fiv1N1DfawIu9+bU3BG5boiQMdAgYzSCUhwojo3KiIpvbzXCmSQd9 +1lJkbwxQFo2GuYZIX+QLyONhGBA1JdF0kBzIrrQWmza+wNj1emftFptZlwAW1+wm +KvZyzAZl3/5fj5/9oAMxlH489edbgRMF/cOmzpB4fIAkbzmvU97xXOzKWX+nPA6D +BTVkkruqESpq2pf06gGnlbCC5Tcf1QS+On+/LGr1frr/aeouRy8xHv5xgVCRcyh+ +nLwOP6W/KYYHAoIBAQCXgjtMkJYxrw0hy6ZWIIsIgyHrD9fty0+H0UmH1DpGXhBb +44s9Q7cxBHik4xPKivCgajcdhIf+q+2BpSW2iF/+5tc7QIxXBytxWPMGVgpRjtgX +uQ3A3yxwm6B9l0EOYg0L0VeEKGCd2CoodWRKPSWHWIn3sdbRHLdnmli7RXUDY7Gr +Ba+IMmDykOgzm/8CJeJ9O9iai/rKgWrmOjdzvTHZTd5vFCC2z8kKCLRrKTLB73sT +yXT1zvW2Zdgfm8R6Sx2Fk+3/o8mRYD/VRzklvFv+2f2ahEe7YQ+teFFPxmQawomk +KtXqe2Ka07lIIy9FgiC7jxzUgzR2gIUAlYwC81iBAoIBAC30Oc0oykf+hv1z1WUm +YD6KlK5q267XJJJ6BlfHh7UATQHjqrSay/Bo7qQPc4RjyJgsxtIQnXOQs+lGNZII +NLXWwIj44sIFXdVyUtTDNG/PXb+q1Kl2+69LgRjQcTudB/hTMjbnhgANKepjDMss +AqZMPZ98+WosIdcTHOY0Ko7InQu7LyPde7RKN17wQmu2j/Ajx6HlavJZIv9Wogyi +cChRdvdslJrGgZyq3UPOxP0Z972iVNJE8doDZnRsH5uaYOH+tfGein3pSAehPYbP +YrZirm40pEgQjQQONV1vtjvWL6YLSo2b9l0n6ga1DYTpij3jsYFEaEqafKgSATSD +JGsCggEAVnGMMovIgEADUAiwQzlYb5/gUjRJOetFpPW8R/3CZqFt3FTprNH0Q7Jb +be3PJCLONqYE8K84n66Ro5I/58oVcJ5QwCwZCmZ+Kk4u7j0RYR9kkpR6gWShSpfw +CkrSVNz0zn3l8GxIs11YO+ztBQG82StU+7PTZH9KGEQhytO3km+txC3EXih7Fn7R +Vb2rJ+2v6aSGjH+1n/GFP8YxKAxYk7jPwI5s4YMrn6TQPt4tgr4I0f7DDjjlVLEg +LMixBvYHG/8fXWtldf6Wwhl6UJ5G0LA4KxXRAJ68RX8cQNLG7mv66xogbLEMnrJr +DDFU5HazFnn1G0/rg2SnKHTRLV2E9g== +-----END PRIVATE KEY----- diff --git a/demos/sslecho/main.c b/demos/sslecho/main.c new file mode 100644 index 0000000000..c6f087c56f --- /dev/null +++ b/demos/sslecho/main.c @@ -0,0 +1,340 @@ +/* + * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <sys/socket.h> +#include <arpa/inet.h> +#include <openssl/ssl.h> +#include <openssl/err.h> + +static const int server_port = 4433; + +typedef unsigned char bool; +#define true 1 +#define false 0 + +/* + * This flag won't be useful until both accept/read (TCP & SSL) methods + * can be called with a timeout. TBD. + */ +static volatile bool server_running = true; + +int create_socket(bool isServer) +{ + int s; + int optval = 1; + struct sockaddr_in addr; + + s = socket(AF_INET, SOCK_STREAM, 0); + if (s < 0) { + perror("Unable to create socket"); + exit(EXIT_FAILURE); + } + + if (isServer) { + addr.sin_family = AF_INET; + addr.sin_port = htons(server_port); + addr.sin_addr.s_addr = INADDR_ANY; + + /* Reuse the address; good for quick restarts */ + if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)) + < 0) { + perror("setsockopt(SO_REUSEADDR) failed"); + exit(EXIT_FAILURE); + } + + if (bind(s, (struct sockaddr*) &addr, sizeof(addr)) < 0) { + perror("Unable to bind"); + exit(EXIT_FAILURE); + } + + if (listen(s, 1) < 0) { + perror("Unable to listen"); + exit(EXIT_FAILURE); + } + } + + return s; +} + +SSL_CTX* create_context(bool isServer) +{ + const SSL_METHOD *method; + SSL_CTX *ctx; + + if (isServer) + method = TLS_server_method(); + else + method = TLS_client_method(); + + ctx = SSL_CTX_new(method); + if (ctx == NULL) { + perror("Unable to create SSL context"); + ERR_print_errors_fp(stderr); + exit(EXIT_FAILURE); + } + + return ctx; +} + +void configure_server_context(SSL_CTX *ctx) +{ + /* Set the key and cert */ + if (SSL_CTX_use_certificate_chain_file(ctx, "cert.pem") <= 0) { + ERR_print_errors_fp(stderr); + exit(EXIT_FAILURE); + } + + if (SSL_CTX_use_PrivateKey_file(ctx, "key.pem", SSL_FILETYPE_PEM) <= 0) { + ERR_print_errors_fp(stderr); + exit(EXIT_FAILURE); + } +} + +void configure_client_context(SSL_CTX *ctx) +{ + /* + * Configure the client to abort the handshake if certificate verification + * fails + */ + SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); + /* + * In a real application you would probably just use the default system certificate trust store and call: + * SSL_CTX_set_default_verify_paths(ctx); + * In this demo though we are using a self-signed certificate, so the client must trust it directly. + */ + if (!SSL_CTX_load_verify_locations(ctx, "cert.pem", NULL)) { + ERR_print_errors_fp(stderr); + exit(EXIT_FAILURE); + } +} + +void usage() +{ + printf("Usage: sslecho s\n"); + printf(" --or--\n"); + printf(" sslecho c ip\n"); + printf(" c=client, s=server, ip=dotted ip of server\n"); + exit(1); +} + +int main(int argc, char **argv) +{ + bool isServer; + int result; + + SSL_CTX *ssl_ctx = NULL; + SSL *ssl = NULL; + + int server_skt = -1; + int client_skt = -1; + + char txbuf[128]; + size_t txcap = sizeof(txbuf); + int txlen; + + char rxbuf[128]; + size_t rxcap = sizeof(rxbuf); + int rxlen; + + char *rem_server_ip = NULL; + + struct sockaddr_in addr; + unsigned int addr_len = sizeof(addr); + + /* Splash */ + printf("\nsslecho : Simple Echo Client/Server (OpenSSL 3.0.1-dev) : %s : %s\n\n", __DATE__, + __TIME__); + + /* Need to know if client or server */ + if (argc < 2) { + usage(); + /* NOTREACHED */ + } + isServer = (argv[1][0] == 's') ? true : false; + /* If client get remote server address (could be 127.0.0.1) */ + if (!isServer) { + if (argc != 3) { + usage(); + /* NOTREACHED */ + } + rem_server_ip = argv[2]; + } + + /* Create context used by both client and server */ + ssl_ctx = create_context(isServer); + + /* If server */ + if (isServer) { + + printf("We are the server on port: %d\n\n", server_port); + + /* Configure server context with appropriate key files */ + configure_server_context(ssl_ctx); + + /* Create server socket; will bind with server port and listen */ + server_skt = create_socket(true); + + /* + * Loop to accept clients. + * Need to implement timeouts on TCP & SSL connect/read functions + * before we can catch a CTRL-C and kill the server. + */ + while (server_running) { + /* Wait for TCP connection from client */ + client_skt = accept(server_skt, (struct sockaddr*) &addr, + &addr_len); + if (client_skt < 0) { + perror("Unable to accept"); + exit(EXIT_FAILURE); + } + + printf("Client TCP connection accepted\n"); + + /* Create server SSL structure using newly accepted client socket */ + ssl = SSL_new(ssl_ctx); + SSL_set_fd(ssl, client_skt); + + /* Wait for SSL connection from the client */ + if (SSL_accept(ssl) <= 0) { + ERR_print_errors_fp(stderr); + server_running = false; + } else { + + printf("Client SSL connection accepted\n\n"); + + /* Echo loop */ + while (true) { + /* Get message from client; will fail if client closes connection */ + if ((rxlen = SSL_read(ssl, rxbuf, rxcap)) <= 0) { + if (rxlen == 0) { + printf("Client closed connection\n"); + } + ERR_print_errors_fp(stderr); + break; + } + /* Insure null terminated input */ + rxbuf[rxlen] = 0; + /* Look for kill switch */ + if (strcmp(rxbuf, "kill\n") == 0) { + /* Terminate...with extreme prejudice */ + printf("Server received 'kill' command\n"); + server_running = false; + break; + } + /* Show received message */ + printf("Received: %s", rxbuf); + /* Echo it back */ + if (SSL_write(ssl, rxbuf, rxlen) <= 0) { + ERR_print_errors_fp(stderr); + } + } + } + if (server_running) { + /* Cleanup for next client */ + SSL_shutdown(ssl); + SSL_free(ssl); + close(client_skt); + } + } + printf("Server exiting...\n"); + } + /* Else client */ + else { + + printf("We are the client\n\n"); + + /* Configure client context so we verify the server correctly */ + configure_client_context(ssl_ctx); + + /* Create "bare" socket */ + client_skt = create_socket(false); + /* Set up connect address */ + addr.sin_family = AF_INET; + inet_pton(AF_INET, rem_server_ip, &addr.sin_addr.s_addr); + addr.sin_port = htons(server_port); + /* Do TCP connect with server */ + if (connect(client_skt, (struct sockaddr*) &addr, sizeof(addr)) != 0) { + perror("Unable to TCP connect to server"); + goto exit; + } else { + printf("TCP connection to server successful\n"); + } + + /* Create client SSL structure using dedicated client socket */ + ssl = SSL_new(ssl_ctx); + SSL_set_fd(ssl, client_skt); + /* Set host name for SNI */ + SSL_set_tlsext_host_name(ssl, rem_server_ip); + /* Configure server hostname check */ + SSL_set1_host(ssl, rem_server_ip); + + /* Now do SSL connect with server */ + if (SSL_connect(ssl) == 1) { + + printf("SSL connection to server successful\n\n"); + + /* Loop to send input from keyboard */ + while (true) { + /* Get a line of input */ + txlen = getline(&txbuf, &txcap, stdin); + /* Exit loop if just a carriage return */ + if (txbuf[0] == '\n') { + break; + } + + /* Send it to the server */ + if ((result = SSL_write(ssl, txbuf, txlen)) <= 0) { + printf("Server closed connection\n"); + ERR_print_errors_fp(stderr); + break; + } + + /* Wait for the echo */ + rxlen = SSL_read(ssl, rxbuf, rxcap); + if (rxlen <= 0) { + printf("Server closed connection\n"); + ERR_print_errors_fp(stderr); + break; + } else { + /* Show it */ + rxbuf[rxlen] = 0; + printf("Received: %s", rxbuf); + } + } + printf("Client exiting...\n"); + } else { + + printf("SSL connection to server failed\n\n"); + + ERR_print_errors_fp(stderr); + } + } + exit: + /* Close up */ + if (ssl != NULL) { + SSL_shutdown(ssl); + SSL_free(ssl); + } + SSL_CTX_free(ssl_ctx); + + if (client_skt != -1) + close(client_skt); + if (server_skt != -1) + close(server_skt); + + OPENSSL_free(txbuf); + OPENSSL_free(rxbuf); + + printf("sslecho exiting\n"); + + return 0; +} diff --git a/demos/sslecho/makefile b/demos/sslecho/makefile new file mode 100644 index 0000000000..6e639917d4 --- /dev/null +++ b/demos/sslecho/makefile @@ -0,0 +1,12 @@ +PROG ?= sslecho + +all: $(PROG) + +# Debug version. +# +$(PROG): main.c + + $(CC) -O0 -g3 -W -Wall -I../../include -L../../ -o $(PROG) main.c -lssl -lcrypto + +clean: + rm -rf $(PROG) *.o *.obj |