#include <stdio.h>
#include <errno.h>
#include <string.h>
+#include <ctype.h> /* isspace() */
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif /* HAVE_MEMORY_H */
#include <sys/types.h>
+#include <sys/stat.h>
+#ifndef HAVE_NET_SOCKET_H
#include <sys/socket.h>
+#else
+#include <net/socket.h>
+#endif
+#include <sys/un.h>
#include <netinet/in.h>
+#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
+#endif
#include <netdb.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#include "fetchmail.h"
#include "i18n.h"
+/* Defines to allow BeOS and Cygwin to play nice... */
+#ifdef __BEOS__
+static char peeked;
+#define fm_close(a) closesocket(a)
+#define fm_write(a,b,c) send(a,b,c,0)
+#define fm_peek(a,b,c) recv(a,b,c,0)
+#define fm_read(a,b,c) recv(a,b,c,0)
+#else
+#define fm_close(a) close(a)
+#define fm_write(a,b,c) write(a,b,c)
+#define fm_peek(a,b,c) recv(a,b,c, MSG_PEEK)
+#ifdef __CYGWIN__
+#define fm_read(a,b,c) cygwin_read(a,b,c)
+static ssize_t cygwin_read(int sock, void *buf, size_t count);
+#else /* ! __CYGWIN__ */
+#define fm_read(a,b,c) read(a,b,c)
+#endif /* __CYGWIN__ */
+#endif
+
+/* We need to define h_errno only if it is not already */
+#ifndef h_errno
+
#ifdef HAVE_RES_SEARCH
/* some versions of FreeBSD should declare this but don't */
extern int h_errno;
static int h_errno;
#endif
-#if NET_SECURITY
+#endif /* ndef h_errno */
+
+#ifdef NET_SECURITY
#include <net/security.h>
#endif /* NET_SECURITY */
#ifdef HAVE_SOCKETPAIR
+static char *const *parse_plugin(const char *plugin, const char *host, const char *service)
+{ const char **argvec;
+ const char *c, *p;
+ char *cp, *plugin_copy;
+ unsigned int plugin_copy_len;
+ unsigned int plugin_offset = 0, plugin_copy_offset = 0;
+ unsigned int i, s = 2 * sizeof(char*), host_count = 0, service_count = 0;
+ unsigned int plugin_len = strlen(plugin);
+ unsigned int host_len = strlen(host);
+ unsigned int service_len = strlen(service);
+
+ for (c = p = plugin; *c; c++)
+ { if (isspace(*c) && !isspace(*p))
+ s += sizeof(char*);
+ if (*p == '%' && *c == 'h')
+ host_count++;
+ if (*p == '%' && *c == 'p')
+ service_count++;
+ p = c;
+ }
+
+ plugin_copy_len = plugin_len + host_len * host_count + service_len * service_count;
+ plugin_copy = malloc(plugin_copy_len + 1);
+ if (!plugin_copy)
+ {
+ report(stderr, GT_("fetchmail: malloc failed\n"));
+ return NULL;
+ }
+
+ while (plugin_copy_offset < plugin_copy_len)
+ { if ((plugin[plugin_offset] == '%') && (plugin[plugin_offset + 1] == 'h'))
+ { strcpy(plugin_copy + plugin_copy_offset, host);
+ plugin_offset += 2;
+ plugin_copy_offset += host_len;
+ }
+ else if ((plugin[plugin_offset] == '%') && (plugin[plugin_offset + 1] == 'p'))
+ { strcpy(plugin_copy + plugin_copy_offset, service);
+ plugin_offset += 2;
+ plugin_copy_offset += service_len;
+ }
+ else
+ { plugin_copy[plugin_copy_offset] = plugin[plugin_offset];
+ plugin_offset++;
+ plugin_copy_offset++;
+ }
+ }
+ plugin_copy[plugin_copy_len] = 0;
+
+ argvec = malloc(s);
+ if (!argvec)
+ {
+ report(stderr, GT_("fetchmail: malloc failed\n"));
+ return NULL;
+ }
+ memset(argvec, 0, s);
+ for (c = p = plugin_copy, i = 0; *c; c++)
+ { if ((!isspace(*c)) && (c == p ? 1 : isspace(*p))) {
+ argvec[i] = c;
+ i++;
+ }
+ p = c;
+ }
+ for (cp = plugin_copy; *cp; cp++)
+ { if (isspace(*cp))
+ *cp = 0;
+ }
+ return (char *const*)argvec;
+}
+
static int handle_plugin(const char *host,
const char *service, const char *plugin)
/* get a socket mediated through a given external command */
{
int fds[2];
+ char *const *argvec;
+
+ /*
+ * The author of this code, Felix von Leitner <felix@convergence.de>, says:
+ * he chose socketpair() instead of pipe() because socketpair creates
+ * bidirectional sockets while allegedly some pipe() implementations don't.
+ */
if (socketpair(AF_UNIX,SOCK_STREAM,0,fds))
{
- error(0, 0, _("fetchmail: socketpair failed: %s(%d)"),strerror(errno),errno);
+ report(stderr, GT_("fetchmail: socketpair failed\n"));
return -1;
}
switch (fork()) {
case -1:
/* error */
- error(0, 0, _("fetchmail: fork failed: %s(%d)"),
- strerror(errno), errno);
+ report(stderr, GT_("fetchmail: fork failed\n"));
return -1;
- break;
case 0: /* child */
/* fds[1] is the parent's end; close it for proper EOF
** detection */
(void) close(fds[1]);
if ( (dup2(fds[0],0) == -1) || (dup2(fds[0],1) == -1) ) {
- error(0, 0, _("fetchmail: dup2 failed: %s(%d)"),
- strerror(errno), errno);
+ report(stderr, GT_("dup2 failed\n"));
exit(1);
}
/* fds[0] is now connected to 0 and 1; close it */
(void) close(fds[0]);
if (outlevel >= O_VERBOSE)
- error(0, 0, _("running %s %s %s"), plugin, host, service);
- execlp(plugin,plugin,host,service,0);
- error(0, 0, _("execl(%s) failed: %s (%d)"),
- plugin, strerror(errno), errno);
+ report(stderr, GT_("running %s (host %s service %s)\n"), plugin, host, service);
+ argvec = parse_plugin(plugin,host,service);
+ execvp(*argvec, argvec);
+ report(stderr, GT_("execvp(%s) failed\n"), *argvec);
exit(0);
break;
default: /* parent */
}
#endif /* HAVE_SOCKETPAIR */
-#if INET6
+#ifdef __UNUSED__
+
+int SockCheckOpen(int fd)
+/* poll given socket; is it selectable? */
+{
+ fd_set r, w, e;
+ int rt;
+ struct timeval tv;
+
+ for (;;)
+ {
+ FD_ZERO(&r); FD_ZERO(&w); FD_ZERO(&e);
+ FD_SET(fd, &e);
+
+ tv.tv_sec = 0; tv.tv_usec = 0;
+ rt = select(fd+1, &r, &w, &e, &tv);
+ if (rt == -1 && (errno != EAGAIN && errno != EINTR))
+ return 0;
+ if (rt != -1)
+ return 1;
+ }
+}
+#endif /* __UNUSED__ */
+
+int UnixOpen(const char *path)
+{
+ int sock = -1;
+ struct sockaddr_un ad;
+ memset(&ad, 0, sizeof(ad));
+ ad.sun_family = AF_UNIX;
+ strncpy(ad.sun_path, path, sizeof(ad.sun_path)-1);
+
+ sock = socket( AF_UNIX, SOCK_STREAM, 0 );
+ if (sock < 0)
+ {
+ h_errno = 0;
+ return -1;
+ }
+
+ /* Socket opened saved. Usefull if connect timeout
+ * because it can be closed.
+ */
+ mailserver_socket_temp = sock;
+
+ if (connect(sock, (struct sockaddr *) &ad, sizeof(ad)) < 0)
+ {
+ int olderr = errno;
+ fm_close(sock); /* don't use SockClose, no traffic yet */
+ h_errno = 0;
+ errno = olderr;
+ sock = -1;
+ }
+
+ /* No connect timeout, then no need to set mailserver_socket_temp */
+ mailserver_socket_temp = -1;
+
+ return sock;
+}
+
+#ifdef INET6_ENABLE
int SockOpen(const char *host, const char *service, const char *options,
const char *plugin)
{
+ struct addrinfo *ai, *ai0, req;
int i;
- struct addrinfo *ai, req;
-#if NET_SECURITY
+#ifdef NET_SECURITY
void *request = NULL;
int requestlen;
#endif /* NET_SECURITY */
memset(&req, 0, sizeof(struct addrinfo));
req.ai_socktype = SOCK_STREAM;
- if (i = getaddrinfo(host, service, &req, &ai)) {
- error(0, 0, _("fetchmail: getaddrinfo(%s.%s): %s(%d)"), host, service, gai_strerror(i), i);
+ if (getaddrinfo(host, service, &req, &ai0)) {
+ report(stderr, GT_("fetchmail: getaddrinfo(%s.%s)\n"), host,service);
return -1;
- };
+ }
#if NET_SECURITY
if (!options)
if (net_security_strtorequest((char *)options, &request, &requestlen))
goto ret;
- i = inner_connect(ai, request, requestlen, NULL, NULL, "fetchmail", NULL);
+ i = inner_connect(ai0, request, requestlen, NULL, NULL, "fetchmail", NULL);
if (request)
free(request);
ret:
#else /* NET_SECURITY */
- i = inner_connect(ai, NULL, 0, NULL, NULL, "fetchmail", NULL);
+#ifdef HAVE_INNER_CONNECT
+ i = inner_connect(ai0, NULL, 0, NULL, NULL, "fetchmail", NULL);
+ if (i >= 0)
+ break;
+#else
+
+ i = -1;
+ for (ai = ai0; ai; ai = ai->ai_next) {
+ i = socket(ai->ai_family, ai->ai_socktype, 0);
+ if (i < 0)
+ continue;
+
+ /* Socket opened saved. Usefull if connect timeout
+ * because it can be closed.
+ */
+ mailserver_socket_temp = i;
+
+ if (connect(i, (struct sockaddr *) ai->ai_addr, ai->ai_addrlen) < 0) {
+ fm_close(i);
+ i = -1;
+ continue;
+ }
+
+ /* No connect timeout, then no need to set mailserver_socket_temp */
+ mailserver_socket_temp = -1;
+
+ break;
+ }
+
+#endif
#endif /* NET_SECURITY */
- freeaddrinfo(ai);
+ freeaddrinfo(ai0);
return i;
-};
-#else /* INET6 */
+}
+#else /* INET6_ENABLE */
#ifndef HAVE_INET_ATON
#ifndef INADDR_NONE
#ifdef INADDR_BROADCAST
int SockOpen(const char *host, int clientPort, const char *options,
const char *plugin)
{
- int sock;
+ int sock = -1; /* pacify -Wall */
#ifndef HAVE_INET_ATON
unsigned long inaddr;
#endif /* HAVE_INET_ATON */
- struct sockaddr_in ad;
+ struct sockaddr_in ad, **pptr;
struct hostent *hp;
#ifdef HAVE_SOCKETPAIR
if (plugin) {
char buf[10];
- sprintf(buf,"%d",clientPort);
+#ifdef HAVE_SNPRINTF
+ snprintf(buf, sizeof(buf), /* Yeah, paranoic. So what? :P */
+#else
+ sprintf(buf,
+#endif /* HAVE_SNPRINTF */
+ "%d",clientPort);
return handle_plugin(host,buf,plugin);
}
#endif /* HAVE_SOCKETPAIR */
/* we'll accept a quad address */
#ifndef HAVE_INET_ATON
- inaddr = inet_addr(host);
+ inaddr = inet_addr((char*)host);
if (inaddr != INADDR_NONE)
+ {
memcpy(&ad.sin_addr, &inaddr, sizeof(inaddr));
- else
#else
- if (!inet_aton(host, &ad.sin_addr))
-#endif /* HAVE_INET_ATON */
+ if (inet_aton(host, &ad.sin_addr))
{
- hp = gethostbyname(host);
+#endif /* HAVE_INET_ATON */
+ ad.sin_port = htons(clientPort);
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0)
+ {
+ h_errno = 0;
+ return -1;
+ }
+
+ /* Socket opened saved. Usefull if connect timeout because
+ * it can be closed
+ */
+ mailserver_socket_temp = sock;
+
+ if (connect(sock, (struct sockaddr *) &ad, sizeof(ad)) < 0)
+ {
+ int olderr = errno;
+ fm_close(sock); /* don't use SockClose, no traffic yet */
+ h_errno = 0;
+ errno = olderr;
+ return -1;
+ }
+
+ /* No connect timeout, then no need to set mailserver_socket_temp */
+ mailserver_socket_temp = -1;
+
+#ifndef HAVE_INET_ATON
+ }
+#else
+ }
+#endif /* HAVE_INET_ATON */
+ else {
+ hp = gethostbyname((char*)host);
if (hp == NULL)
{
if(hp->h_length != 4 && hp->h_length != 8)
{
h_errno = errno = 0;
- error(0, 0, _("fetchmail: illegal address length received for host %s"));
+ report(stderr,
+ GT_("fetchmail: illegal address length received for host %s\n"),host);
return -1;
}
/*
- * FIXME: make this work for multihomed hosts.
- * We're toast if we get back multiple addresses and h_addrs[0]
- * (aka h_addr) is not one we can actually connect to; this happens
- * with multi-homed boxen.
+ * Try all addresses of a possibly multihomed host until we get
+ * a successful connect or until we run out of addresses.
*/
- memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
- }
- ad.sin_port = htons(clientPort);
-
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0)
- {
- h_errno = 0;
- return -1;
- }
- if (connect(sock, (struct sockaddr *) &ad, sizeof(ad)) < 0)
- {
- int olderr = errno;
- close(sock);
- h_errno = 0;
- errno = olderr;
- return -1;
+ pptr = (struct sockaddr_in **)hp->h_addr_list;
+ for(; *pptr != NULL; pptr++)
+ {
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0)
+ {
+ h_errno = 0;
+ return -1;
+ }
+
+ /* Socket opened saved. Usefull if connect timeout because
+ * it can be closed
+ */
+ mailserver_socket_temp = sock;
+
+ ad.sin_port = htons(clientPort);
+ memcpy(&ad.sin_addr, *pptr, sizeof(struct in_addr));
+ if (connect(sock, (struct sockaddr *) &ad, sizeof(ad)) == 0) {
+ /* No connect timeout, then no need to set mailserver_socket_temp */
+ mailserver_socket_temp = -1;
+ break; /* success */
+ }
+ fm_close(sock); /* don't use SockClose, no traffic yet */
+ memset(&ad, 0, sizeof(ad));
+ ad.sin_family = AF_INET;
+ }
+ if(*pptr == NULL)
+ {
+ int olderr = errno;
+ fm_close(sock); /* don't use SockClose, no traffic yet */
+ h_errno = 0;
+ errno = olderr;
+ return -1;
+ }
}
return(sock);
}
-#endif /* INET6 */
+#endif /* INET6_ENABLE */
#if defined(HAVE_STDARG_H)
}
+#ifdef SSL_ENABLE
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/pem.h>
+#include <openssl/x509.h>
+#include <openssl/rand.h>
+
+static SSL_CTX *_ctx = NULL;
+static SSL *_ssl_context[FD_SETSIZE];
+
+SSL *SSLGetContext( int );
+#endif /* SSL_ENABLE */
+
int SockWrite(int sock, char *buf, int len)
{
int n, wrlen = 0;
+#ifdef SSL_ENABLE
+ SSL *ssl;
+#endif
while (len)
{
- n = write(sock, buf, len);
+#ifdef SSL_ENABLE
+ if( NULL != ( ssl = SSLGetContext( sock ) ) )
+ n = SSL_write(ssl, buf, len);
+ else
+#endif /* SSL_ENABLE */
+ n = fm_write(sock, buf, len);
if (n <= 0)
return -1;
len -= n;
{
char *newline, *bp = buf;
int n;
+ int maxavailable = 0;
+#ifdef SSL_ENABLE
+ SSL *ssl;
+#endif
if (--len < 1)
return(-1);
+#ifdef __BEOS__
+ if (peeked != 0){
+ (*bp) = peeked;
+ bp++;
+ len--;
+ peeked = 0;
+ }
+#endif
do {
/*
* The reason for these gymnastics is that we want two things:
* (2) to return the true length of data read, even if the
* data coming in has embedded NULS.
*/
- if ((n = recv(sock, bp, len, MSG_PEEK)) <= 0)
- return(-1);
- if ((newline = memchr(bp, '\n', n)) != NULL)
- n = newline - bp + 1;
- if ((n = read(sock, bp, n)) == -1)
- return(-1);
+#ifdef SSL_ENABLE
+ if( NULL != ( ssl = SSLGetContext( sock ) ) ) {
+ /* Hack alert! */
+ /* OK... SSL_peek works a little different from MSG_PEEK
+ Problem is that SSL_peek can return 0 if there
+ is no data currently available. If, on the other
+ hand, we loose the socket, we also get a zero, but
+ the SSL_read then SEGFAULTS! To deal with this,
+ we'll check the error code any time we get a return
+ of zero from SSL_peek. If we have an error, we bail.
+ If we don't, we read one character in SSL_read and
+ loop. This should continue to work even if they
+ later change the behavior of SSL_peek
+ to "fix" this problem... :-( */
+ if ((n = SSL_peek(ssl, bp, len)) < 0) {
+ (void)SSL_get_error(ssl, n);
+ return(-1);
+ }
+ maxavailable = n;
+ if( 0 == n ) {
+ /* SSL_peek says no data... Does he mean no data
+ or did the connection blow up? If we got an error
+ then bail! */
+ if( 0 != ( n = SSL_get_error(ssl, n) ) ) {
+ return -1;
+ }
+ /* We didn't get an error so read at least one
+ character at this point and loop */
+ n = 1;
+ /* Make sure newline start out NULL!
+ * We don't have a string to pass through
+ * the strchr at this point yet */
+ newline = NULL;
+ } else if ((newline = memchr(bp, '\n', n)) != NULL)
+ n = newline - bp + 1;
+ /* Matthias Andree: SSL_read can return 0, in that case
+ * we must cal SSL_get_error to figure if there was
+ * an error or just a "no data" condition */
+ if ((n = SSL_read(ssl, bp, n)) <= 0) {
+ if ((n = SSL_get_error(ssl, n))) {
+ return(-1);
+ }
+ }
+ /* Check for case where our single character turned out to
+ * be a newline... (It wasn't going to get caught by
+ * the strchr above if it came from the hack... ). */
+ if( NULL == newline && 1 == n && '\n' == *bp ) {
+ /* Got our newline - this will break
+ out of the loop now */
+ newline = bp;
+ }
+ }
+ else
+#endif /* SSL_ENABLE */
+ {
+
+#ifdef __BEOS__
+ if ((n = fm_read(sock, bp, 1)) <= 0)
+#else
+ if ((n = fm_peek(sock, bp, len)) <= 0)
+#endif
+ return (-1);
+ maxavailable = n;
+ if ((newline = memchr(bp, '\n', n)) != NULL)
+ n = newline - bp + 1;
+#ifndef __BEOS__
+ if ((n = fm_read(sock, bp, n)) == -1)
+ return(-1);
+#endif /* __BEOS__ */
+ }
bp += n;
len -= n;
} while
(!newline && len);
*bp = '\0';
+
+#ifdef FORCE_STUFFING /* too ugly to live -- besides, there's IMAP */
+ /* OK, very weird hack coming up here:
+ * When POP3 servers send us a message, they're supposed to
+ * terminate the message with a line containing only a dot. To protect
+ * against lines in the real message that might contain only a dot,
+ * they're supposed to preface any line that starts with a dot with
+ * an additional dot, which will be removed on the client side. That
+ * process, called byte-stuffing (and unstuffing) is really not the
+ * concern of this low-level routine, ordinarily, but there are some
+ * POP servers (and maybe IMAP servers too, who knows) that fail to
+ * do the byte-stuffing, and this routine is the best place to try to
+ * identify and fix that fault.
+ *
+ * Since the DOT line is supposed to come only at the end of a
+ * message, the implication is that right after we see it, the server
+ * is supposed to go back to waiting for the next command. There
+ * isn't supposed to be any more data to read after we see the dot.
+ * THEREFORE, if we see more data to be read after something that
+ * looks like the dot line, then probably the server is failing to
+ * do byte-stuffing. In that case, we'll byte-pack it for them so
+ * that the higher-level routines see things as hunky-dorey.
+ * This is not a perfect test or fix by any means (it has an
+ * obvious race condition, for one thing), but it should at least
+ * reduce the nastiness that ensues when people don't know how
+ * to write POP servers.
+ */
+ if ((maxavailable > (bp-buf)) &&
+ ((((bp-buf) == 3) &&
+ (buf[0] == '.') &&
+ (buf[1] == '\r') &&
+ (buf[2] == '\n')) ||
+ (((bp-buf) == 2) &&
+ (buf[0] == '.') &&
+ (buf[1] == '\n')))) {
+
+ memmove(buf+1, buf, (bp-buf)+1);
+ buf[0] = '.';
+ bp++;
+ }
+#endif /* FORCE_STUFFING */
return bp - buf;
}
{
int n;
char ch;
+#ifdef SSL_ENABLE
+ SSL *ssl;
+#endif
- if ((n = recv(sock, &ch, 1, MSG_PEEK)) == -1)
- return -1;
- else
- return(ch);
+#ifdef SSL_ENABLE
+ if( NULL != ( ssl = SSLGetContext( sock ) ) ) {
+ n = SSL_peek(ssl, &ch, 1);
+ if (n < 0) {
+ (void)SSL_get_error(ssl, n);
+ return -1;
+ }
+ if( 0 == n ) {
+ /* This code really needs to implement a "hold back"
+ * to simulate a functioning SSL_peek()... sigh...
+ * Has to be coordinated with the read code above.
+ * Next on the list todo... */
+
+ /* SSL_peek says 0... Does that mean no data
+ or did the connection blow up? If we got an error
+ then bail! */
+ if( 0 != ( n = SSL_get_error(ssl, n) ) ) {
+ return -1;
+ }
+
+ /* Haven't seen this case actually occur, but...
+ if the problem in SockRead can occur, this should
+ be possible... Just not sure what to do here.
+ This should be a safe "punt" the "peek" but don't
+ "punt" the "session"... */
+
+ return 0; /* Give him a '\0' character */
+ }
+ }
+ else
+#endif /* SSL_ENABLE */
+ n = fm_peek(sock, &ch, 1);
+ if (n == -1)
+ return -1;
+
+#ifdef __BEOS__
+ peeked = ch;
+#endif
+ return(ch);
+}
+
+#ifdef SSL_ENABLE
+
+static char *_ssl_server_cname = NULL;
+static int _check_fp;
+static char *_check_digest;
+static char *_server_label;
+static int _depth0ck;
+
+SSL *SSLGetContext( int sock )
+{
+ /* If SSLOpen has never initialized - just return NULL */
+ if( NULL == _ctx )
+ return NULL;
+
+ if( sock < 0 || sock > FD_SETSIZE )
+ return NULL;
+ return _ssl_context[sock];
+}
+
+
+static int SSL_verify_callback( int ok_return, X509_STORE_CTX *ctx, int strict )
+{
+ char buf[257];
+ X509 *x509_cert;
+ int err, depth;
+ unsigned char digest[EVP_MAX_MD_SIZE];
+ char text[EVP_MAX_MD_SIZE * 3 + 1], *tp, *te;
+ const EVP_MD *digest_tp;
+ unsigned int dsz, i, esz;
+ X509_NAME *subj, *issuer;
+
+ x509_cert = X509_STORE_CTX_get_current_cert(ctx);
+ err = X509_STORE_CTX_get_error(ctx);
+ depth = X509_STORE_CTX_get_error_depth(ctx);
+
+ subj = X509_get_subject_name(x509_cert);
+ issuer = X509_get_issuer_name(x509_cert);
+
+ if (depth == 0) {
+ _depth0ck = 1;
+
+ if (outlevel == O_VERBOSE) {
+ if ((i = X509_NAME_get_text_by_NID(issuer, NID_organizationName, buf, sizeof(buf))) != -1) {
+ report(stdout, GT_("Issuer Organization: %s\n"), buf);
+ if (i >= sizeof(buf) - 1)
+ report(stdout, GT_("Warning: Issuer Organization Name too long (possibly truncated).\n"));
+ } else
+ report(stdout, GT_("Unknown Organization\n"));
+ if ((i = X509_NAME_get_text_by_NID(issuer, NID_commonName, buf, sizeof(buf))) != -1) {
+ report(stdout, GT_("Issuer CommonName: %s\n"), buf);
+ if (i >= sizeof(buf) - 1)
+ report(stdout, GT_("Warning: Issuer CommonName too long (possibly truncated).\n"));
+ } else
+ report(stdout, GT_("Unknown Issuer CommonName\n"));
+ }
+ if ((i = X509_NAME_get_text_by_NID(subj, NID_commonName, buf, sizeof(buf))) != -1) {
+ if (outlevel == O_VERBOSE)
+ report(stdout, GT_("Server CommonName: %s\n"), buf);
+ if (i >= sizeof(buf) - 1) {
+ /* Possible truncation. In this case, this is a DNS name, so this
+ * is really bad. We do not tolerate this even in the non-strict case. */
+ report(stderr, GT_("Bad certificate: Subject CommonName too long!\n"));
+ return (0);
+ }
+ if (_ssl_server_cname != NULL) {
+ char *p1 = buf;
+ char *p2 = _ssl_server_cname;
+ int n;
+
+ if (*p1 == '*') {
+ ++p1;
+ n = strlen(p2) - strlen(p1);
+ if (n >= 0)
+ p2 += n;
+ }
+ if (0 != strcasecmp(p1, p2)) {
+ report(stderr,
+ GT_("Server CommonName mismatch: %s != %s\n"),
+ buf, _ssl_server_cname );
+ if (ok_return && strict)
+ return (0);
+ }
+ } else if (ok_return && strict) {
+ report(stderr, GT_("Server name not set, could not verify certificate!\n"));
+ return (0);
+ }
+ } else {
+ if (outlevel == O_VERBOSE)
+ report(stdout, GT_("Unknown Server CommonName\n"));
+ if (ok_return && strict) {
+ report(stderr, GT_("Server name not specified in certificate!\n"));
+ return (0);
+ }
+ }
+ /* Print the finger print. Note that on errors, we might print it more than once
+ * normally; we kluge around that by using a global variable. */
+ if (_check_fp) {
+ _check_fp = 0;
+ digest_tp = EVP_md5();
+ if (digest_tp == NULL) {
+ report(stderr, GT_("EVP_md5() failed!\n"));
+ return (0);
+ }
+ if (!X509_digest(x509_cert, digest_tp, digest, &dsz)) {
+ report(stderr, GT_("Out of memory!\n"));
+ return (0);
+ }
+ tp = text;
+ te = text + sizeof(text);
+ for (i = 0; i < dsz; i++) {
+#ifdef HAVE_SNPRINTF
+ esz = snprintf(tp, te - tp, i > 0 ? ":%02X" : "%02X", digest[i]);
+#else
+ esz = sprintf(tp, i > 0 ? ":%02X" : "%02X", digest[i]);
+#endif
+ if (esz >= te - tp) {
+ report(stderr, GT_("Digest text buffer too small!\n"));
+ return (0);
+ }
+ tp += esz;
+ }
+ if (outlevel > O_NORMAL)
+ report(stdout, GT_("%s key fingerprint: %s\n"), _server_label, text);
+ if (_check_digest != NULL) {
+ if (strcmp(text, _check_digest) == 0) {
+ if (outlevel > O_NORMAL)
+ report(stdout, GT_("%s fingerprints match.\n"), _server_label);
+ } else {
+ if (outlevel > O_SILENT)
+ report(stderr, GT_("%s fingerprints do not match!\n"), _server_label);
+ return (0);
+ }
+ }
+ }
+ }
+
+ if (err != X509_V_OK && (strict || outlevel == O_VERBOSE)) {
+ report(strict ? stderr : stdout, GT_("Warning: server certificate verification: %s\n"), X509_verify_cert_error_string(err));
+ /* We gave the error code, but maybe we can add some more details for debugging */
+ switch (err) {
+ case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
+ X509_NAME_oneline(issuer, buf, sizeof(buf));
+ buf[sizeof(buf) - 1] = '\0';
+ report(stdout, GT_("unknown issuer (first %d characters): %s\n"), sizeof(buf), buf);
+ break;
+ }
+ }
+ if (!strict)
+ ok_return = 1;
+ return (ok_return);
+}
+
+static int SSL_nock_verify_callback( int ok_return, X509_STORE_CTX *ctx )
+{
+ return SSL_verify_callback(ok_return, ctx, 0);
}
+static int SSL_ck_verify_callback( int ok_return, X509_STORE_CTX *ctx )
+{
+ return SSL_verify_callback(ok_return, ctx, 1);
+}
+
+/* performs initial SSL handshake over the connected socket
+ * uses SSL *ssl global variable, which is currently defined
+ * in this file
+ */
+int SSLOpen(int sock, char *mycert, char *mykey, char *myproto, int certck, char *certpath,
+ char *fingerprint, char *servercname, char *label)
+{
+ SSL *ssl;
+ struct stat randstat;
+ int i;
+
+ SSL_load_error_strings();
+ SSLeay_add_ssl_algorithms();
+
+#ifdef SSL_ENABLE
+ if (stat("/dev/random", &randstat) &&
+ stat("/dev/urandom", &randstat)) {
+ /* Neither /dev/random nor /dev/urandom are present, so add
+ entropy to the SSL PRNG a hard way. */
+ for (i = 0; i < 10000 && ! RAND_status (); ++i) {
+ char buf[4];
+ struct timeval tv;
+ gettimeofday (&tv, 0);
+ buf[0] = tv.tv_usec & 0xF;
+ buf[2] = (tv.tv_usec & 0xF0) >> 4;
+ buf[3] = (tv.tv_usec & 0xF00) >> 8;
+ buf[1] = (tv.tv_usec & 0xF000) >> 12;
+ RAND_add (buf, sizeof buf, 0.1);
+ }
+ }
+#endif /* SSL_ENABLE */
+
+
+ if( sock < 0 || sock > FD_SETSIZE ) {
+ report(stderr, GT_("File descriptor out of range for SSL") );
+ return( -1 );
+ }
+
+ if( ! _ctx ) {
+ /* Be picky and make sure the memory is cleared */
+ memset( _ssl_context, 0, sizeof( _ssl_context ) );
+ if(myproto) {
+ if(!strcmp("ssl2",myproto)) {
+ _ctx = SSL_CTX_new(SSLv2_client_method());
+ } else if(!strcmp("ssl3",myproto)) {
+ _ctx = SSL_CTX_new(SSLv3_client_method());
+ } else if(!strcmp("tls1",myproto)) {
+ _ctx = SSL_CTX_new(TLSv1_client_method());
+ } else if (!strcmp("ssl23",myproto)) {
+ myproto = NULL;
+ } else {
+ fprintf(stderr,GT_("Invalid SSL protocol '%s' specified, using default (SSLv23).\n"), myproto);
+ myproto = NULL;
+ }
+ }
+ if(!myproto) {
+ _ctx = SSL_CTX_new(SSLv23_client_method());
+ }
+ if(_ctx == NULL) {
+ ERR_print_errors_fp(stderr);
+ return(-1);
+ }
+ }
+
+ if (certck) {
+ SSL_CTX_set_verify(_ctx, SSL_VERIFY_PEER, SSL_ck_verify_callback);
+ if (certpath)
+ SSL_CTX_load_verify_locations(_ctx, NULL, certpath);
+ } else {
+ /* In this case, we do not fail if verification fails. However,
+ * we provide the callback for output and possible fingerprint checks. */
+ SSL_CTX_set_verify(_ctx, SSL_VERIFY_PEER, SSL_nock_verify_callback);
+ }
+
+ _ssl_context[sock] = SSL_new(_ctx);
+
+ if(_ssl_context[sock] == NULL) {
+ ERR_print_errors_fp(stderr);
+ return(-1);
+ }
+
+ /* This static is for the verify callback */
+ _ssl_server_cname = servercname;
+ _server_label = label;
+ _check_fp = 1;
+ _check_digest = fingerprint;
+ _depth0ck = 0;
+
+ if( mycert || mykey ) {
+
+ /* Ok... He has a certificate file defined, so lets declare it. If
+ * he does NOT have a separate certificate and private key file then
+ * assume that it's a combined key and certificate file.
+ */
+ if( !mykey )
+ mykey = mycert;
+ if( !mycert )
+ mycert = mykey;
+ SSL_use_certificate_file(_ssl_context[sock], mycert, SSL_FILETYPE_PEM);
+ SSL_use_RSAPrivateKey_file(_ssl_context[sock], mykey, SSL_FILETYPE_PEM);
+ }
+
+ SSL_set_fd(_ssl_context[sock], sock);
+
+ if(SSL_connect(_ssl_context[sock]) < 1) {
+ ERR_print_errors_fp(stderr);
+ return(-1);
+ }
+
+ /* Paranoia: was the callback not called as we expected? */
+ if ((fingerprint != NULL || certck) && !_depth0ck) {
+ report(stderr, GT_("Certificate/fingerprint verification was somehow skipped!\n"));
+
+ if( NULL != ( ssl = SSLGetContext( sock ) ) ) {
+ /* Clean up the SSL stack */
+ SSL_free( _ssl_context[sock] );
+ _ssl_context[sock] = NULL;
+ }
+ return(-1);
+ }
+
+ return(0);
+}
+#endif
+
int SockClose(int sock)
-/* close a socket (someday we may do other cleanup here) */
+/* close a socket gracefully */
{
- return(close(sock));
+#ifdef SSL_ENABLE
+ SSL *ssl;
+
+ if( NULL != ( ssl = SSLGetContext( sock ) ) ) {
+ /* Clean up the SSL stack */
+ SSL_free( _ssl_context[sock] );
+ _ssl_context[sock] = NULL;
+ }
+#endif
+
+#ifdef __UNUSED__
+ /*
+ * This hangs in RedHat 6.2 after fetchmail runs for a while a
+ * FIN_WAIT2 comes up in netstat and fetchmail never returns from
+ * the recv system call. (Reported from jtnews
+ * <jtnews@bellatlantic.net>, Wed, 24 May 2000 21:26:02.)
+ *
+ * Half-close the connection first so the other end gets notified.
+ *
+ * This stops sends but allows receives (effectively, it sends a
+ * TCP <FIN>). */
+ if (shutdown(sock, 1) == 0) {
+ char ch;
+ /* If there is any data still waiting in the queue, discard it.
+ * Call recv() until either it returns 0 (meaning we received a FIN)
+ * or any error occurs. This makes sure all data sent by the other
+ * side is acknowledged at the TCP level.
+ */
+ if (fm_peek(sock, &ch, 1) > 0)
+ while (fm_read(sock, &ch, 1) > 0)
+ continue;
+ }
+#endif /* __UNUSED__ */
+
+ /* if there's an error closing at this point, not much we can do */
+ return(fm_close(sock)); /* this is guarded */
}
+#ifdef __CYGWIN__
+/*
+ * Workaround Microsoft Winsock recv/WSARecv(..., MSG_PEEK) bug.
+ * See http://sources.redhat.com/ml/cygwin/2001-08/msg00628.html
+ * for more details.
+ */
+static ssize_t cygwin_read(int sock, void *buf, size_t count)
+{
+ char *bp = buf;
+ int n = 0;
+
+ if ((n = read(sock, bp, count)) == -1)
+ return(-1);
+
+ if (n != count) {
+ int n2 = 0;
+ if (outlevel >= O_VERBOSE)
+ report(stdout, GT_("Cygwin socket read retry\n"));
+ n2 = read(sock, bp + n, count - n);
+ if (n2 == -1 || n + n2 != count) {
+ report(stderr, GT_("Cygwin socket read retry failed!\n"));
+ return(-1);
+ }
+ }
+
+ return count;
+}
+#endif /* __CYGWIN__ */
+
#ifdef MAIN
/*
* Use the chargen service to test input buffering directly.
* You may have to uncomment the `chargen' service description in your
- * inetd.conf (and then SIGHUP inetd) for this to work.
- */
+ * inetd.conf (and then SIGHUP inetd) for this to work. */
main()
{
int sock = SockOpen("localhost", 19, NULL);
projects / ~andy / fetchmail / blobdiff