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#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <stdarg.h>
#include <openssl/ssl.h>
#include <auth-client.h>
#include <libesmtp.h>
#if !defined (__GNUC__) || __GNUC__ < 2
# define __attribute__(x)
#endif
int
handle_invalid_peer_certificate(long vfy_result)
{
const char *k ="rare error";
switch(vfy_result) {
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
k="X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT"; break;
case X509_V_ERR_UNABLE_TO_GET_CRL:
k="X509_V_ERR_UNABLE_TO_GET_CRL"; break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
k="X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE"; break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
k="X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE"; break;
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
k="X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY"; break;
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
k="X509_V_ERR_CERT_SIGNATURE_FAILURE"; break;
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
k="X509_V_ERR_CRL_SIGNATURE_FAILURE"; break;
case X509_V_ERR_CERT_NOT_YET_VALID:
k="X509_V_ERR_CERT_NOT_YET_VALID"; break;
case X509_V_ERR_CERT_HAS_EXPIRED:
k="X509_V_ERR_CERT_HAS_EXPIRED"; break;
case X509_V_ERR_CRL_NOT_YET_VALID:
k="X509_V_ERR_CRL_NOT_YET_VALID"; break;
case X509_V_ERR_CRL_HAS_EXPIRED:
k="X509_V_ERR_CRL_HAS_EXPIRED"; break;
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
k="X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD"; break;
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
k="X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD"; break;
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
k="X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD"; break;
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
k="X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD"; break;
case X509_V_ERR_OUT_OF_MEM:
k="X509_V_ERR_OUT_OF_MEM"; break;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
k="X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT"; break;
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
k="X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN"; break;
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
k="X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY"; break;
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
k="X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE"; break;
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
k="X509_V_ERR_CERT_CHAIN_TOO_LONG"; break;
case X509_V_ERR_CERT_REVOKED:
k="X509_V_ERR_CERT_REVOKED"; break;
case X509_V_ERR_INVALID_CA:
k="X509_V_ERR_INVALID_CA"; break;
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
k="X509_V_ERR_PATH_LENGTH_EXCEEDED"; break;
case X509_V_ERR_INVALID_PURPOSE:
k="X509_V_ERR_INVALID_PURPOSE"; break;
case X509_V_ERR_CERT_UNTRUSTED:
k="X509_V_ERR_CERT_UNTRUSTED"; break;
case X509_V_ERR_CERT_REJECTED:
k="X509_V_ERR_CERT_REJECTED"; break;
}
printf("SMTP_EV_INVALID_PEER_CERTIFICATE: %ld: %s\n", vfy_result, k);
return 1; /* Accept the problem */
}
void event_cb (smtp_session_t session, int event_no, void *arg,...)
{
va_list alist;
int *ok;
va_start(alist, arg);
switch(event_no) {
case SMTP_EV_CONNECT:
case SMTP_EV_MAILSTATUS:
case SMTP_EV_RCPTSTATUS:
case SMTP_EV_MESSAGEDATA:
case SMTP_EV_MESSAGESENT:
case SMTP_EV_DISCONNECT: break;
case SMTP_EV_WEAK_CIPHER: {
int bits;
bits = va_arg(alist, long); ok = va_arg(alist, int*);
printf("SMTP_EV_WEAK_CIPHER, bits=%d - accepted.\n", bits);
*ok = 1; break;
}
case SMTP_EV_STARTTLS_OK:
puts("SMTP_EV_STARTTLS_OK - TLS started here."); break;
case SMTP_EV_INVALID_PEER_CERTIFICATE: {
long vfy_result;
vfy_result = va_arg(alist, long); ok = va_arg(alist, int*);
*ok = handle_invalid_peer_certificate(vfy_result);
break;
}
case SMTP_EV_NO_PEER_CERTIFICATE: {
ok = va_arg(alist, int*);
puts("SMTP_EV_NO_PEER_CERTIFICATE - accepted.");
*ok = 1; break;
}
case SMTP_EV_WRONG_PEER_CERTIFICATE: {
ok = va_arg(alist, int*);
puts("SMTP_EV_WRONG_PEER_CERTIFICATE - accepted.");
*ok = 1; break;
}
case SMTP_EV_NO_CLIENT_CERTIFICATE: {
ok = va_arg(alist, int*);
puts("SMTP_EV_NO_CLIENT_CERTIFICATE - accepted.");
*ok = 1; break;
}
default:
printf("Got event: %d - ignored.\n", event_no);
}
va_end(alist);
}
/* Callback to prnt the recipient status */
void
print_recipient_status (smtp_recipient_t recipient,
const char *mailbox, void *arg)
{
const smtp_status_t *status;
status = smtp_recipient_status (recipient);
printf ("%s: %d %s", mailbox, status->code, status->text);
}
void sendMail(const char *messageContents, const char *emailAddress)
{
smtp_session_t session;
smtp_message_t message;
smtp_recipient_t recipient;
const smtp_status_t *status;
struct sigaction sa;
char *host = "localhost:25";
char *from = "gnunet-monkey";
char *subject = "e-mail from Libesmtp!";
const char *recipient_address = emailAddress;
char tempFileName[1000];
int tempFd;
FILE *fp;
enum notify_flags notify = Notify_SUCCESS | Notify_FAILURE;
auth_client_init();
session = smtp_create_session();
message = smtp_add_message(session);
/* Ignore sigpipe */
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGPIPE, &sa, NULL);
smtp_set_server(session, host);
smtp_set_eventcb(session, event_cb, NULL);
/* Set the reverse path for the mail envelope. (NULL is ok)
*/
smtp_set_reverse_path(message, from);
/* Set the Subject: header. For no reason, we want the supplied subject
to override any subject line in the message headers. */
if (subject != NULL) {
smtp_set_header(message, "Subject", subject);
smtp_set_header_option(message, "Subject", Hdr_OVERRIDE, 1);
}
/* Prepare message */
memset(tempFileName, 0, sizeof(tempFileName));
sprintf(tempFileName, "/tmp/messageXXXXXX");
tempFd = mkstemp(tempFileName);
fp = fdopen(tempFd, "w");
fprintf(fp, "%s", messageContents);
fclose(fp);
fp = fopen(tempFileName, "r");
smtp_set_message_fp(message, fp);
recipient = smtp_add_recipient(message, recipient_address);
smtp_dsn_set_notify (recipient, notify);
/* Initiate a connection to the SMTP server and transfer the
message. */
if (!smtp_start_session(session)) {
char buf[128];
fprintf(stderr, "SMTP server problem %s\n", smtp_strerror(smtp_errno(),
buf, sizeof buf));
} else {
/* Report on the success or otherwise of the mail transfer.
*/
status = smtp_message_transfer_status(message);
printf("%d %s", status->code, (status->text != NULL) ? status->text
: "\n");
smtp_enumerate_recipients(message, print_recipient_status, NULL);
}
/* Free resources consumed by the program.
*/
smtp_destroy_session(session);
fclose(fp);
auth_client_exit();
}
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