forked from pool/netcat-openbsd
Peter Simons
221ef298d8
OBS-URL: https://build.opensuse.org/package/show/network:utilities/netcat-openbsd?expand=0&rev=29
106 lines
3.1 KiB
Diff
106 lines
3.1 KiB
Diff
From: Thomas Habets <habets@google.com>
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Date: Sat, 18 Feb 2017 21:07:22 +0000
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Subject: Fix TCP MD5SIG for client connections
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---
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netcat.c | 34 ++++++++++++++++++++++++++--------
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1 file changed, 26 insertions(+), 8 deletions(-)
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diff --git a/netcat.c b/netcat.c
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index 8291173..990c31b 100644
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--- a/netcat.c
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+++ b/netcat.c
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@@ -46,6 +46,9 @@
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#ifdef __linux__
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# include <linux/in6.h>
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#endif
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+#if defined(TCP_MD5SIG_EXT) && defined(TCP_MD5SIG_MAXKEYLEN)
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+# include <bsd/readpassphrase.h>
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+#endif
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#ifndef IPTOS_LOWDELAY
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# define IPTOS_LOWDELAY 0x10
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@@ -175,6 +178,9 @@ FILE *Zflag; /* file to save peer cert */
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int Cflag = 0; /* CRLF line-ending */
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#endif
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+#if defined(TCP_MD5SIG_EXT) && defined(TCP_MD5SIG_MAXKEYLEN)
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+char Sflag_password[TCP_MD5SIG_MAXKEYLEN];
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+#endif
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int recvcount, recvlimit;
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int timeout = -1;
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int family = AF_UNSPEC;
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@@ -206,7 +212,7 @@ void connection_info(const char *, const char *, const char *, const char *);
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int unix_bind(char *, int);
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int unix_connect(char *);
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int unix_listen(char *);
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-void set_common_sockopts(int, int);
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+void set_common_sockopts(int, const struct sockaddr *);
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int process_tos_opt(char *, int *);
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#ifdef HAVE_TLS
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int process_tls_opt(char *, int *);
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@@ -456,7 +462,10 @@ main(int argc, char *argv[])
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break;
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#endif
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case 'S':
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-#ifdef TCP_MD5SIG
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+#if defined(TCP_MD5SIG_EXT) && defined(TCP_MD5SIG_MAXKEYLEN)
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+ if (readpassphrase("TCP MD5SIG password: ",
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+ Sflag_password, TCP_MD5SIG_MAXKEYLEN, RPP_REQUIRE_TTY) == NULL)
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+ errx(1, "Unable to read TCP MD5SIG password");
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Sflag = 1;
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#else
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errx(1, "no TCP MD5 signature support available");
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@@ -1161,7 +1170,7 @@ remote_connect(const char *host, const char *port, struct addrinfo hints,
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freeaddrinfo(ares);
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}
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- set_common_sockopts(s, res->ai_family);
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+ set_common_sockopts(s, res->ai_addr);
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if (ipaddr != NULL) {
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herr = getnameinfo(res->ai_addr, res->ai_addrlen,
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@@ -1336,7 +1345,7 @@ local_listen(const char *host, const char *port, struct addrinfo hints)
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err(1, NULL);
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#endif
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- set_common_sockopts(s, res->ai_family);
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+ set_common_sockopts(s, res->ai_addr);
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if (bind(s, (struct sockaddr *)res->ai_addr,
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res->ai_addrlen) == 0)
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@@ -1910,9 +1919,10 @@ connection_info(const char *host, const char *port, const char *proto,
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}
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void
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-set_common_sockopts(int s, int af)
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+set_common_sockopts(int s, const struct sockaddr* sa)
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{
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int x = 1;
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+ int af = sa->sa_family;
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#ifdef SO_BROADCAST
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if (bflag) {
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@@ -1923,10 +1933,18 @@ set_common_sockopts(int s, int af)
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err(1, NULL);
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}
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#endif
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-#ifdef TCP_MD5SIG
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+#if defined(TCP_MD5SIG_EXT) && defined(TCP_MD5SIG_MAXKEYLEN)
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if (Sflag) {
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- if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
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- &x, sizeof(x)) == -1)
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+ struct tcp_md5sig sig;
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+ memset(&sig, 0, sizeof(sig));
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+ memcpy(&sig.tcpm_addr, sa, sizeof(struct sockaddr_storage));
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+ sig.tcpm_keylen = TCP_MD5SIG_MAXKEYLEN < strlen(Sflag_password)
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+ ? TCP_MD5SIG_MAXKEYLEN
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+ : strlen(Sflag_password);
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+ memcpy(sig.tcpm_key, Sflag_password, sig.tcpm_keylen);
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+ sig.tcpm_flags = TCP_MD5SIG_FLAG_PREFIX;
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+ if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG_EXT,
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+ &sig, sizeof(sig)) == -1)
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err(1, NULL);
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}
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#endif
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