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110 lines
3.1 KiB
110 lines
3.1 KiB
/* cli.cpp - Minimal ssleay client for Unix |
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30.9.1996, Sampo Kellomaki <sampo@iki.fi> */ |
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/* mangled to work with SSLeay-0.9.0b and OpenSSL 0.9.2b |
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Simplified to be even more minimal |
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12/98 - 4/99 Wade Scholine <wades@mail.cybg.com> */ |
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#include <stdio.h> |
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#include <memory.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <netdb.h> |
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#include <openssl/crypto.h> |
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#include <openssl/x509.h> |
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#include <openssl/pem.h> |
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#include <openssl/ssl.h> |
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#include <openssl/err.h> |
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#define CHK_NULL(x) if ((x)==NULL) exit (1) |
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#define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); } |
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#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr); exit(2); } |
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void main () |
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{ |
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int err; |
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int sd; |
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struct sockaddr_in sa; |
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SSL_CTX* ctx; |
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SSL* ssl; |
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X509* server_cert; |
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char* str; |
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char buf [4096]; |
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SSL_METHOD *meth; |
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SSLeay_add_ssl_algorithms(); |
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meth = SSLv2_client_method(); |
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SSL_load_error_strings(); |
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ctx = SSL_CTX_new (meth); CHK_NULL(ctx); |
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CHK_SSL(err); |
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/* ----------------------------------------------- */ |
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/* Create a socket and connect to server using normal socket calls. */ |
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sd = socket (AF_INET, SOCK_STREAM, 0); CHK_ERR(sd, "socket"); |
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memset (&sa, '\0', sizeof(sa)); |
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sa.sin_family = AF_INET; |
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sa.sin_addr.s_addr = inet_addr ("127.0.0.1"); /* Server IP */ |
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sa.sin_port = htons (1111); /* Server Port number */ |
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err = connect(sd, (struct sockaddr*) &sa, |
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sizeof(sa)); CHK_ERR(err, "connect"); |
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/* ----------------------------------------------- */ |
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/* Now we have TCP conncetion. Start SSL negotiation. */ |
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ssl = SSL_new (ctx); CHK_NULL(ssl); |
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SSL_set_fd (ssl, sd); |
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err = SSL_connect (ssl); CHK_SSL(err); |
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/* Following two steps are optional and not required for |
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data exchange to be successful. */ |
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/* Get the cipher - opt */ |
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printf ("SSL connection using %s\n", SSL_get_cipher (ssl)); |
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/* Get server's certificate (note: beware of dynamic allocation) - opt */ |
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server_cert = SSL_get_peer_certificate (ssl); CHK_NULL(server_cert); |
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printf ("Server certificate:\n"); |
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str = X509_NAME_oneline (X509_get_subject_name (server_cert),0,0); |
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CHK_NULL(str); |
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printf ("\t subject: %s\n", str); |
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OPENSSL_free (str); |
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str = X509_NAME_oneline (X509_get_issuer_name (server_cert),0,0); |
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CHK_NULL(str); |
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printf ("\t issuer: %s\n", str); |
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OPENSSL_free (str); |
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/* We could do all sorts of certificate verification stuff here before |
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deallocating the certificate. */ |
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X509_free (server_cert); |
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/* --------------------------------------------------- */ |
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/* DATA EXCHANGE - Send a message and receive a reply. */ |
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err = SSL_write (ssl, "Hello World!", strlen("Hello World!")); CHK_SSL(err); |
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err = SSL_read (ssl, buf, sizeof(buf) - 1); CHK_SSL(err); |
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buf[err] = '\0'; |
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printf ("Got %d chars:'%s'\n", err, buf); |
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SSL_shutdown (ssl); /* send SSL/TLS close_notify */ |
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/* Clean up. */ |
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close (sd); |
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SSL_free (ssl); |
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SSL_CTX_free (ctx); |
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} |
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/* EOF - cli.cpp */
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