+++ /dev/null
-tunala
-
-*.flc
-semantic.cache
+++ /dev/null
-Certificate:
- Data:
- Version: 3 (0x2)
- Serial Number: 2 (0x2)
- Signature Algorithm: md5WithRSAEncryption
- Issuer: C=NZ, L=Wellington, O=Really Irresponsible Authorisation Authority (RIAA), OU=Cert-stamping, CN=Jackov al-Trades/Email=none@fake.domain
- Validity
- Not Before: Jan 16 05:19:30 2002 GMT
- Not After : Jan 14 05:19:30 2012 GMT
- Subject: C=NZ, L=Auckland, O=Mordor, OU=SSL grunt things, CN=tunala-client/Email=client@fake.domain
- Subject Public Key Info:
- Public Key Algorithm: rsaEncryption
- RSA Public Key: (1024 bit)
- Modulus (1024 bit):
- 00:b0:d3:56:5c:c8:7f:fb:f4:95:9d:04:84:4f:82:
- b7:a2:75:5c:81:48:8c:56:5d:52:ee:38:e1:5c:c8:
- 9a:70:8e:72:f2:00:1c:17:ef:df:b7:06:59:82:04:
- f1:f6:49:11:12:a6:4d:cb:1e:ed:ac:59:1c:4a:d0:
- 3d:de:e6:f2:8d:cd:39:c2:0f:e0:46:2f:db:cb:9f:
- 47:f7:56:e7:f8:16:5f:68:71:fb:3a:e3:ab:d2:e5:
- 05:b7:da:65:61:fe:6d:30:e4:12:a8:b5:c1:71:24:
- 6b:aa:80:05:41:17:a0:8b:6e:8b:e6:04:cf:85:7b:
- 2a:ac:a1:79:7d:f4:96:6e:77
- Exponent: 65537 (0x10001)
- X509v3 extensions:
- X509v3 Basic Constraints:
- CA:FALSE
- Netscape Comment:
- OpenSSL Generated Certificate
- X509v3 Subject Key Identifier:
- F8:43:CB:4F:4D:4F:BC:6E:52:1A:FD:F9:7B:E1:12:3F:A7:A3:BA:93
- X509v3 Authority Key Identifier:
- keyid:49:FB:45:72:12:C4:CC:E1:45:A1:D3:08:9E:95:C4:2C:6D:55:3F:17
- DirName:/C=NZ/L=Wellington/O=Really Irresponsible Authorisation Authority (RIAA)/OU=Cert-stamping/CN=Jackov al-Trades/Email=none@fake.domain
- serial:00
-
- Signature Algorithm: md5WithRSAEncryption
- 8f:5f:0e:43:da:9d:61:43:7e:03:38:9a:e6:50:9d:42:e8:95:
- 34:49:75:ec:04:8d:5c:85:99:94:70:a0:e7:1f:1e:a0:8b:0f:
- d6:e2:cb:f7:35:d9:96:72:bd:a6:e9:8d:4e:b1:e2:ac:97:7f:
- 2f:70:01:9d:aa:04:bc:d4:01:2b:63:77:a5:de:63:3c:a8:f5:
- f2:72:af:ec:11:12:c0:d4:70:cf:71:a6:fb:e9:1d:b3:27:07:
- aa:f2:b1:f3:87:d6:ab:8b:ce:c2:08:1b:3c:f9:ba:ff:77:71:
- 86:09:ef:9e:4e:04:06:63:44:e9:93:20:90:c7:2d:50:c6:50:
- f8:66
------BEGIN CERTIFICATE-----
-MIID9TCCA16gAwIBAgIBAjANBgkqhkiG9w0BAQQFADCBtDELMAkGA1UEBhMCTlox
-EzARBgNVBAcTCldlbGxpbmd0b24xPDA6BgNVBAoTM1JlYWxseSBJcnJlc3BvbnNp
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-y09NT7xuUhr9+XvhEj+no7qTMIHhBgNVHSMEgdkwgdaAFEn7RXISxMzhRaHTCJ6V
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-ExBKYWNrb3YgYWwtVHJhZGVzMR8wHQYJKoZIhvcNAQkBFhBub25lQGZha2UuZG9t
-YWluggEAMA0GCSqGSIb3DQEBBAUAA4GBAI9fDkPanWFDfgM4muZQnULolTRJdewE
-jVyFmZRwoOcfHqCLD9biy/c12ZZyvabpjU6x4qyXfy9wAZ2qBLzUAStjd6XeYzyo
-9fJyr+wREsDUcM9xpvvpHbMnB6rysfOH1quLzsIIGzz5uv93cYYJ755OBAZjROmT
-IJDHLVDGUPhm
------END CERTIFICATE-----
------BEGIN RSA PRIVATE KEY-----
-MIICXgIBAAKBgQCw01ZcyH/79JWdBIRPgreidVyBSIxWXVLuOOFcyJpwjnLyABwX
-79+3BlmCBPH2SRESpk3LHu2sWRxK0D3e5vKNzTnCD+BGL9vLn0f3Vuf4Fl9ocfs6
-46vS5QW32mVh/m0w5BKotcFxJGuqgAVBF6CLbovmBM+FeyqsoXl99JZudwIDAQAB
-AoGAU4chbqbPvkclPYzaq2yGLlneHrwUft+KwzlfS6L/QVgo+CQRIUWQmjaHpaGM
-YtjVFcg1S1QK1bUqZjTEZT0XKhfbYmqW8yYTfbcDEbnY7esoYlvIlW8qRlPRlTBE
-utKrtZafmVhLgoNawYGD0aLZofPqpYjbGUlrC7nrem2vNJECQQDVLD3Qb+OlEMET
-73ApnJhYsK3e+G2LTrtjrS8y5zS4+Xv61XUqvdV7ogzRl0tpvSAmMOItVyoYadkB
-S3xSIWX9AkEA1Fm1FhkQSZwGG5rf4c6gMN71jJ6JE3/kocdVa0sUjRevIupo4XQ2
-Vkykxi84MRP8cfHqyjewq7Ozv3op2MGWgwJBAKemsb66IJjzAkaBav7u70nhOf0/
-+Dc1Zl7QF2y7NVW8sGrnccx5m+ot2lMD4AV6/kvK6jaqdKrapBZGnbGiHqkCQQDI
-T1r33mqz1R8Z2S2Jtzz6/McKf930a/dC+GLGVEutkILf39lRmytKmv/wB0jtWtoO
-rlJ5sLDSNzC+1cE1u997AkEAu3IrtGmLKiuS6kDj6W47m+iiTIsuSJtTJb1SbUaK
-fIoBNFxbvJYW6rUU9+PxpMRaEhzh5s24/jBOE+mlb17mRQ==
------END RSA PRIVATE KEY-----
+++ /dev/null
-Certificate:
- Data:
- Version: 3 (0x2)
- Serial Number: 1 (0x1)
- Signature Algorithm: md5WithRSAEncryption
- Issuer: C=NZ, L=Wellington, O=Really Irresponsible Authorisation Authority (RIAA), OU=Cert-stamping, CN=Jackov al-Trades/Email=none@fake.domain
- Validity
- Not Before: Jan 16 05:14:06 2002 GMT
- Not After : Jan 14 05:14:06 2012 GMT
- Subject: C=NZ, L=Wellington, O=Middle Earth, OU=SSL dev things, CN=tunala-server/Email=server@fake.domain
- Subject Public Key Info:
- Public Key Algorithm: rsaEncryption
- RSA Public Key: (1024 bit)
- Modulus (1024 bit):
- 00:a9:3e:62:87:97:13:6b:de:8f:bc:1d:0a:3f:65:
- 0c:f9:76:a3:53:ce:97:30:27:0d:c6:df:72:1f:8d:
- 5a:ce:58:23:6a:65:e5:e3:72:1a:8d:7f:fe:90:01:
- ea:42:f1:9f:6e:7b:0a:bd:eb:52:15:7b:f4:3d:9c:
- 4e:db:74:29:2b:d1:81:9d:b9:9e:18:2b:87:e1:da:
- 50:20:3c:59:6c:c9:83:3e:2c:11:0b:78:1e:03:f4:
- 56:3a:db:95:6a:75:33:85:a9:7b:cc:3c:4a:67:96:
- f2:24:b2:a0:cb:2e:cc:52:18:16:6f:44:d9:29:64:
- 07:2e:fb:56:cc:7c:dc:a2:d7
- Exponent: 65537 (0x10001)
- X509v3 extensions:
- X509v3 Basic Constraints:
- CA:FALSE
- Netscape Comment:
- OpenSSL Generated Certificate
- X509v3 Subject Key Identifier:
- 70:AC:7A:B5:6E:97:C2:82:AF:11:9E:32:CB:8D:48:49:93:B7:DC:22
- X509v3 Authority Key Identifier:
- keyid:49:FB:45:72:12:C4:CC:E1:45:A1:D3:08:9E:95:C4:2C:6D:55:3F:17
- DirName:/C=NZ/L=Wellington/O=Really Irresponsible Authorisation Authority (RIAA)/OU=Cert-stamping/CN=Jackov al-Trades/Email=none@fake.domain
- serial:00
-
- Signature Algorithm: md5WithRSAEncryption
- 2e:cb:a3:cd:6d:a8:9d:d1:dc:e5:f0:e0:27:7e:4b:5a:90:a8:
- 85:43:f0:05:f7:04:43:d7:5f:d1:a5:8f:5c:58:eb:fc:da:c6:
- 7c:e0:0b:2b:98:72:95:f6:79:48:96:7a:fa:0c:6b:09:ec:c6:
- 8c:91:74:45:9f:8f:0f:16:78:e3:66:14:fa:1e:f4:f0:23:ec:
- cd:a9:52:77:20:4d:c5:05:2c:52:b6:7b:f3:42:33:fd:90:1f:
- 3e:88:6f:9b:23:61:c8:80:3b:e6:57:84:2e:f7:26:c7:35:ed:
- 00:8b:08:30:9b:aa:21:83:b6:6d:b8:7c:8a:9b:2a:ef:79:3d:
- 96:31
------BEGIN CERTIFICATE-----
-MIID+zCCA2SgAwIBAgIBATANBgkqhkiG9w0BAQQFADCBtDELMAkGA1UEBhMCTlox
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-qiGDtm24fIqbKu95PZYx
------END CERTIFICATE-----
------BEGIN RSA PRIVATE KEY-----
-MIICXAIBAAKBgQCpPmKHlxNr3o+8HQo/ZQz5dqNTzpcwJw3G33IfjVrOWCNqZeXj
-chqNf/6QAepC8Z9uewq961IVe/Q9nE7bdCkr0YGduZ4YK4fh2lAgPFlsyYM+LBEL
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-4KXwIxQAt9yRaFLpiIR9do5bjjKNnMguf3aO/XRSDQM=
------END RSA PRIVATE KEY-----
+++ /dev/null
------BEGIN CERTIFICATE-----
-MIID9zCCA2CgAwIBAgIBADANBgkqhkiG9w0BAQQFADCBtDELMAkGA1UEBhMCTlox
-EzARBgNVBAcTCldlbGxpbmd0b24xPDA6BgNVBAoTM1JlYWxseSBJcnJlc3BvbnNp
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-ZOyJZ9Fit5XM2X0=
------END CERTIFICATE-----
+++ /dev/null
-There are two ways to build this code;
-
-(1) Manually
-
-(2) Using all-singing all-dancing (all-confusing) autotools, ie. autoconf,
-automake, and their little friends (autoheader, etc).
-
-=================
-Building Manually
-=================
-
-There is a basic "Makefile" in this directory that gets moved out of the way and
-ignored when building with autoconf et al. This Makefile is suitable for
-building tunala on Linux using gcc. Any other platform probably requires some
-tweaking. Here are the various bits you might need to do if you want to build
-this way and the default Makefile isn't sufficient;
-
-* Compiler: Edit the "CC" definition in Makefile
-
-* Headers, features: tunala.h controls what happens in the non-autoconf world.
- It, by default, assumes the system has *everything* (except autoconf's
- "config.h") so if a target system is missing something it must define the
- appropriate "NO_***" symbols in CFLAGS. These include;
-
- - NO_HAVE_UNISTD_H, NO_HAVE_FCNTL_H, NO_HAVE_LIMITS_H
- Indicates the compiling system doesn't have (or need) these header files.
- - NO_HAVE_STRSTR, NO_HAVE_STRTOUL
- Indicates the compiling system doesn't have these functions. Replacements
- are compiled and used in breakage.c
- - NO_HAVE_SELECT, NO_HAVE_SOCKET
- Pointless symbols - these indicate select() and/or socket() are missing in
- which case the program won't compile anyway.
-
- If you want to specify any of these, add them with "-D" prefixed to each in
- the CFLAGS definition in Makefile.
-
-* Compilation flags: edit DEBUG_FLAGS and/or CFLAGS directly to control the
- flags passed to the compiler. This can also be used to change the degree of
- optimisation.
-
-* Linker flags: some systems (eg. Solaris) require extra linker flags such as;
- -ldl, -lsocket, -lnsl, etc. If unsure, bring up the man page for whichever
- function is "undefined" when the linker fails - that usually indicates what
- you need to add. Make changes to the LINK_FLAGS symbol.
-
-* Linker command: if a different linker syntax or even a different program is
- required to link, edit the linker line directly in the "tunala:" target
- definition - it currently assumes the "CC" (compiler) program is used to link.
-
-======================
-Building Automagically
-======================
-
-Automagic building is handled courtesy of autoconf, automake, etc. There are in
-fact two steps required to build, and only the first has to be done on a system
-with these tools installed (and if I was prepared to bloat out the CVS
-repository, I could store these extra files, but I'm not).
-
-First step: "autogunk.sh"
--------------------------
-
-The "./autogunk.sh" script will call all the necessary autotool commands to
-create missing files and run automake and autoconf. The result is that a
-"./configure" script should be generated and a "Makefile.in" generated from the
-supplied "Makefile.am". NB: This script also moves the "manual" Makefile (see
-above) out of the way and calls it "Makefile.plain" - the "ungunk" script
-reverses this to leave the directory it was previously.
-
-Once "ungunk" has been run, the resulting directory should be able to build on
-other systems without autoconf, automake, or libtool. Which is what the second
-step describes;
-
-Second step: "./configure"
---------------------------
-
-The second step is to run the generated "./configure" script to create a
-config.h header for your system and to generate a "Makefile" (generated from
-"Makefile.in") tweaked to compile on your system. This is the standard sort of
-thing you see in GNU packages, for example, and the standard tricks also work.
-Eg. to override "configure"'s choice of compiler, set the CC environment
-variable prior to running configure, eg.
-
- CC=gcc ./configure
-
-would cause "gcc" to be used even if there is an otherwise preferable (to
-autoconf) native compiler on your system.
-
-After this run "make" and it should build the "tunala" executable.
-
-Notes
------
-
-- Some versions of autoconf (or automake?) generate a Makefile syntax that gives
- trouble to some "make" programs on some systems (eg. OpenBSD). If this
- happens, either build 'Manually' (see above) or use "gmake" instead of "make".
- I don't like this either but like even less the idea of sifting into all the
- script magic crud that's involved.
-
-- On a solaris system I tried, the "configure" script specified some broken
- compiler flags in the resulting Makefile that don't even get echoed to
- stdout/err when the error happens (evil!). If this happens, go into the
- generated Makefile, find the two affected targets ("%.o:" and "%.lo"), and
- remove the offending hidden option in the $(COMPILE) line all the sludge after
- the two first lines of script (ie. after the "echo" and the "COMPILE" lines).
- NB: This will probably only function if "--disable-shared" was used, otherwise
- who knows what would result ...
-
+++ /dev/null
-# Edit these to suit
-#
-# Oh yeah, and please read the README too.
-
-
-SSL_HOMEDIR=../..
-SSL_INCLUDEDIR=$(SSL_HOMEDIR)/include
-SSL_LIBDIR=$(SSL_HOMEDIR)
-
-RM=rm -f
-CC=gcc
-DEBUG_FLAGS=-g -ggdb3 -Wall -Wshadow
-INCLUDE_FLAGS=-I$(SSL_INCLUDEDIR)
-CFLAGS=$(DEBUG_FLAGS) $(INCLUDE_FLAGS) -DNO_CONFIG_H
-COMPILE=$(CC) $(CFLAGS) -c
-
-# Edit, particularly the "-ldl" if not building with "dlfcn" support
-LINK_FLAGS=-L$(SSL_LIBDIR) -lssl -lcrypto -ldl
-
-SRCS=buffer.c cb.c ip.c sm.c tunala.c breakage.c
-OBJS=buffer.o cb.o ip.o sm.o tunala.o breakage.o
-
-TARGETS=tunala
-
-default: $(TARGETS)
-
-clean:
- $(RM) $(OBJS) $(TARGETS) *.bak core
-
-.c.o:
- $(COMPILE) $<
-
-tunala: $(OBJS)
- $(CC) -o tunala $(OBJS) $(LINK_FLAGS)
-
-# Extra dependencies, should really use makedepend
-buffer.o: buffer.c tunala.h
-cb.o: cb.c tunala.h
-ip.o: ip.c tunala.h
-sm.o: sm.c tunala.h
-tunala.o: tunala.c tunala.h
+++ /dev/null
-# Our includes come from the OpenSSL build-tree we're in
-INCLUDES = -I$(top_builddir)/../../include
-
-bin_PROGRAMS = tunala
-
-tunala_SOURCES = tunala.c buffer.c cb.c ip.c sm.c breakage.c
-tunala_LDADD = -L$(top_builddir)/../.. -lssl -lcrypto
+++ /dev/null
-This is intended to be an example of a state-machine driven SSL application. It
-acts as an SSL tunneler (functioning as either the server or client half,
-depending on command-line arguments). *PLEASE* read the comments in tunala.h
-before you treat this stuff as anything more than a curiosity - YOU HAVE BEEN
-WARNED!! There, that's the draconian bit out of the way ...
-
-
-Why "tunala"??
---------------
-
-I thought I asked you to read tunala.h?? :-)
-
-
-Show me
--------
-
-If you want to simply see it running, skip to the end and see some example
-command-line arguments to demonstrate with.
-
-
-Where to look and what to do?
------------------------------
-
-The code is split up roughly coinciding with the detaching of an "abstract" SSL
-state machine (which is the purpose of all this) and its surrounding application
-specifics. This is primarily to make it possible for me to know when I could cut
-corners and when I needed to be rigorous (or at least maintain the pretense as
-such :-).
-
-Network stuff:
-
-Basically, the network part of all this is what is supposed to be abstracted out
-of the way. The intention is to illustrate one way to stick OpenSSL's mechanisms
-inside a little memory-driven sandbox and operate it like a pure state-machine.
-So, the network code is inside both ip.c (general utility functions and gory
-IPv4 details) and tunala.c itself, which takes care of application specifics
-like the main select() loop. The connectivity between the specifics of this
-application (TCP/IP tunneling and the associated network code) and the
-underlying abstract SSL state machine stuff is through the use of the "buffer_t"
-type, declared in tunala.h and implemented in buffer.c.
-
-State machine:
-
-Which leaves us, generally speaking, with the abstract "state machine" code left
-over and this is sitting inside sm.c, with declarations inside tunala.h. As can
-be seen by the definition of the state_machine_t structure and the associated
-functions to manipulate it, there are the 3 OpenSSL "handles" plus 4 buffer_t
-structures dealing with IO on both the encrypted and unencrypted sides ("dirty"
-and "clean" respectively). The "SSL" handle is what facilitates the reading and
-writing of the unencrypted (tunneled) data. The two "BIO" handles act as the
-read and write channels for encrypted tunnel traffic - in other applications
-these are often socket BIOs so that the OpenSSL framework operates with the
-network layer directly. In this example, those two BIOs are memory BIOs
-(BIO_s_mem()) so that the sending and receiving of the tunnel traffic stays
-within the state-machine, and we can handle where this gets send to (or read
-from) ourselves.
-
-
-Why?
-----
-
-If you take a look at the "state_machine_t" section of tunala.h and the code in
-sm.c, you will notice that nothing related to the concept of 'transport' is
-involved. The binding to TCP/IP networking occurs in tunala.c, specifically
-within the "tunala_item_t" structure that associates a state_machine_t object
-with 4 file-descriptors. The way to best see where the bridge between the
-outside world (TCP/IP reads, writes, select()s, file-descriptors, etc) and the
-state machine is, is to examine the "tunala_item_io()" function in tunala.c.
-This is currently around lines 641-732 but of course could be subject to change.
-
-
-And...?
--------
-
-Well, although that function is around 90 lines of code, it could easily have
-been a lot less only I was trying to address an easily missed "gotcha" (item (2)
-below). The main() code that drives the select/accept/IO loop initialises new
-tunala_item_t structures when connections arrive, and works out which
-file-descriptors go where depending on whether we're an SSL client or server
-(client --> accepted connection is clean and proxied is dirty, server -->
-accepted connection is dirty and proxied is clean). What that tunala_item_io()
-function is attempting to do is 2 things;
-
- (1) Perform all reads and writes on the network directly into the
- state_machine_t's buffers (based on a previous select() result), and only
- then allow the abstact state_machine_t to "churn()" using those buffers.
- This will cause the SSL machine to consume as much input data from the two
- "IN" buffers as possible, and generate as much output data into the two
- "OUT" buffers as possible. Back up in the main() function, the next main
- loop loop will examine these output buffers and select() for writability
- on the corresponding sockets if the buffers are non-empty.
-
- (2) Handle the complicated tunneling-specific issue of cascading "close"s.
- This is the reason for most of the complexity in the logic - if one side
- of the tunnel is closed, you can't simply close the other side and throw
- away the whole thing - (a) there may still be outgoing data on the other
- side of the tunnel that hasn't been sent yet, (b) the close (or things
- happening during the close) may cause more data to be generated that needs
- sending on the other side. Of course, this logic is complicated yet futher
- by the fact that it's different depending on which side closes first :-)
- state_machine_close_clean() will indicate to the state machine that the
- unencrypted side of the tunnel has closed, so any existing outgoing data
- needs to be flushed, and the SSL stream needs to be closed down using the
- appropriate shutdown sequence. state_machine_close_dirty() is simpler
- because it indicates that the SSL stream has been disconnected, so all
- that remains before closing the other side is to flush out anything that
- remains and wait for it to all be sent.
-
-Anyway, with those things in mind, the code should be a little easier to follow
-in terms of "what is *this* bit supposed to achieve??!!".
-
-
-How might this help?
---------------------
-
-Well, the reason I wrote this is that there seemed to be rather a flood of
-questions of late on the openssl-dev and openssl-users lists about getting this
-whole IO logic thing sorted out, particularly by those who were trying to either
-use non-blocking IO, or wanted SSL in an environment where "something else" was
-handling the network already and they needed to operate in memory only. This
-code is loosely based on some other stuff I've been working on, although that
-stuff is far more complete, far more dependant on a whole slew of other
-network/framework code I don't want to incorporate here, and far harder to look
-at for 5 minutes and follow where everything is going. I will be trying over
-time to suck in a few things from that into this demo in the hopes it might be
-more useful, and maybe to even make this demo usable as a utility of its own.
-Possible things include:
-
- * controlling multiple processes/threads - this can be used to combat
- latencies and get passed file-descriptor limits on some systems, and it uses
- a "controller" process/thread that maintains IPC links with the
- processes/threads doing the real work.
-
- * cert verification rules - having some say over which certs get in or out :-)
-
- * control over SSL protocols and cipher suites
-
- * A few other things you can already do in s_client and s_server :-)
-
- * Support (and control over) session resuming, particularly when functioning
- as an SSL client.
-
-If you have a particular environment where this model might work to let you "do
-SSL" without having OpenSSL be aware of the transport, then you should find you
-could use the state_machine_t structure (or your own variant thereof) and hook
-it up to your transport stuff in much the way tunala.c matches it up with those
-4 file-descriptors. The state_machine_churn(), state_machine_close_clean(), and
-state_machine_close_dirty() functions are the main things to understand - after
-that's done, you just have to ensure you're feeding and bleeding the 4
-state_machine buffers in a logical fashion. This state_machine loop handles not
-only handshakes and normal streaming, but also renegotiates - there's no special
-handling required beyond keeping an eye on those 4 buffers and keeping them in
-sync with your outer "loop" logic. Ie. if one of the OUT buffers is not empty,
-you need to find an opportunity to try and forward its data on. If one of the IN
-buffers is not full, you should keep an eye out for data arriving that should be
-placed there.
-
-This approach could hopefully also allow you to run the SSL protocol in very
-different environments. As an example, you could support encrypted event-driven
-IPC where threads/processes pass messages to each other inside an SSL layer;
-each IPC-message's payload would be in fact the "dirty" content, and the "clean"
-payload coming out of the tunnel at each end would be the real intended message.
-Likewise, this could *easily* be made to work across unix domain sockets, or
-even entirely different network/comms protocols.
-
-This is also a quick and easy way to do VPN if you (and the remote network's
-gateway) support virtual network devices that are encapsulted in a single
-network connection, perhaps PPP going through an SSL tunnel?
-
-
-Suggestions
------------
-
-Please let me know if you find this useful, or if there's anything wrong or
-simply too confusing about it. Patches are also welcome, but please attach a
-description of what it changes and why, and "diff -urN" format is preferred.
-Mail to geoff@openssl.org should do the trick.
-
-
-Example
--------
-
-Here is an example of how to use "tunala" ...
-
-First, it's assumed that OpenSSL has already built, and that you are building
-inside the ./demos/tunala/ directory. If not - please correct the paths and
-flags inside the Makefile. Likewise, if you want to tweak the building, it's
-best to try and do so in the makefile (eg. removing the debug flags and adding
-optimisation flags).
-
-Secondly, this code has mostly only been tested on Linux. However, some
-autoconf/etc support has been added and the code has been compiled on openbsd
-and solaris using that.
-
-Thirdly, if you are Win32, you probably need to do some *major* rewriting of
-ip.c to stand a hope in hell. Good luck, and please mail me the diff if you do
-this, otherwise I will take a look at another time. It can certainly be done,
-but it's very non-POSIXy.
-
-See the INSTALL document for details on building.
-
-Now, if you don't have an executable "tunala" compiled, go back to "First,...".
-Rinse and repeat.
-
-Inside one console, try typing;
-
-(i) ./tunala -listen localhost:8080 -proxy localhost:8081 -cacert CA.pem \
- -cert A-client.pem -out_totals -v_peer -v_strict
-
-In another console, type;
-
-(ii) ./tunala -listen localhost:8081 -proxy localhost:23 -cacert CA.pem \
- -cert A-server.pem -server 1 -out_totals -v_peer -v_strict
-
-Now if you open another console and "telnet localhost 8080", you should be
-tunneled through to the telnet service on your local machine (if it's running -
-you could change it to port "22" and tunnel ssh instead if you so desired). When
-you logout of the telnet session, the tunnel should cleanly shutdown and show
-you some traffic stats in both consoles. Feel free to experiment. :-)
-
-Notes:
-
- - the format for the "-listen" argument can skip the host part (eg. "-listen
- 8080" is fine). If you do, the listening socket will listen on all interfaces
- so you can connect from other machines for example. Using the "localhost"
- form listens only on 127.0.0.1 so you can only connect locally (unless, of
- course, you've set up weird stuff with your networking in which case probably
- none of the above applies).
-
- - ./tunala -? gives you a list of other command-line options, but tunala.c is
- also a good place to look :-)
-
-
+++ /dev/null
-#!/bin/sh
-
-# This script tries to follow the "GNU way" w.r.t. the autobits.
-# This does of course generate a number of irritating files.
-# Try to get over it (I am getting there myself).
-
-# This should generate any missing crud, and then run autoconf which should turn
-# configure.in into a "./configure" script and "Makefile.am" into a
-# "Makefile.in". Then running "./configure" should turn "Makefile.in" into
-# "Makefile" and should generate the config.h containing your systems various
-# settings. I know ... what a hassle ...
-
-# Also, sometimes these autobits things generate bizarre output (looking like
-# errors). So I direct everything "elsewhere" ...
-
-(aclocal
-autoheader
-libtoolize --copy --force
-automake --foreign --add-missing --copy
-autoconf) 1> /dev/null 2>&1
-
-# Move the "no-autotools" Makefile out of the way
-if test ! -f Makefile.plain; then
- mv Makefile Makefile.plain
-fi
+++ /dev/null
-#!/bin/sh
-
-# This script tries to clean up as much as is possible from whatever diabolical
-# mess has been left in the directory thanks to autoconf, automake, and their
-# friends.
-
-if test -f Makefile.plain; then
- if test -f Makefile; then
- make distclean
- fi
- mv Makefile.plain Makefile
-else
- make clean
-fi
-
-rm -f aclocal.m4 config.* configure install-sh \
- missing mkinstalldirs stamp-h.* Makefile.in \
- ltconfig ltmain.sh depcomp
-rm -rf autom4te.cache
+++ /dev/null
-#include "tunala.h"
-
-int int_strtoul(const char *str, unsigned long *val)
-{
-#ifdef HAVE_STRTOUL
- char *tmp;
- unsigned long ret = strtoul(str, &tmp, 10);
- if((str == tmp) || (*tmp != '\0'))
- /* The value didn't parse cleanly */
- return 0;
- if(ret == ULONG_MAX)
- /* We hit a limit */
- return 0;
- *val = ret;
- return 1;
-#else
- char buf[2];
- unsigned long ret = 0;
- buf[1] = '\0';
- if(str == '\0')
- /* An empty string ... */
- return 0;
- while(*str != '\0') {
- /* We have to multiply 'ret' by 10 before absorbing the next
- * digit. If this will overflow, catch it now. */
- if(ret && (((ULONG_MAX + 10) / ret) < 10))
- return 0;
- ret *= 10;
- if(!isdigit(*str))
- return 0;
- buf[0] = *str;
- ret += atoi(buf);
- str++;
- }
- *val = ret;
- return 1;
-#endif
-}
-
-#ifndef HAVE_STRSTR
-char *int_strstr(const char *haystack, const char *needle)
-{
- const char *sub_haystack = haystack, *sub_needle = needle;
- unsigned int offset = 0;
- if(!needle)
- return haystack;
- if(!haystack)
- return NULL;
- while((*sub_haystack != '\0') && (*sub_needle != '\0')) {
- if(sub_haystack[offset] == sub_needle) {
- /* sub_haystack is still a candidate */
- offset++;
- sub_needle++;
- } else {
- /* sub_haystack is no longer a possibility */
- sub_haystack++;
- offset = 0;
- sub_needle = needle;
- }
- }
- if(*sub_haystack == '\0')
- /* Found nothing */
- return NULL;
- return sub_haystack;
-}
-#endif
+++ /dev/null
-#include "tunala.h"
-
-#ifndef NO_BUFFER
-
-void buffer_init(buffer_t *buf)
-{
- buf->used = 0;
- buf->total_in = buf->total_out = 0;
-}
-
-void buffer_close(buffer_t *buf)
-{
- /* Our data is static - nothing needs "release", just reset it */
- buf->used = 0;
-}
-
-/* Code these simple ones in compact form */
-unsigned int buffer_used(buffer_t *buf) {
- return buf->used; }
-unsigned int buffer_unused(buffer_t *buf) {
- return (MAX_DATA_SIZE - buf->used); }
-int buffer_full(buffer_t *buf) {
- return (buf->used == MAX_DATA_SIZE ? 1 : 0); }
-int buffer_notfull(buffer_t *buf) {
- return (buf->used < MAX_DATA_SIZE ? 1 : 0); }
-int buffer_empty(buffer_t *buf) {
- return (buf->used == 0 ? 1 : 0); }
-int buffer_notempty(buffer_t *buf) {
- return (buf->used > 0 ? 1 : 0); }
-unsigned long buffer_total_in(buffer_t *buf) {
- return buf->total_in; }
-unsigned long buffer_total_out(buffer_t *buf) {
- return buf->total_out; }
-
-/* These 3 static (internal) functions don't adjust the "total" variables as
- * it's not sure when they're called how it should be interpreted. Only the
- * higher-level "buffer_[to|from]_[fd|SSL|BIO]" functions should alter these
- * values. */
-#if 0 /* To avoid "unused" warnings */
-static unsigned int buffer_adddata(buffer_t *buf, const unsigned char *ptr,
- unsigned int size)
-{
- unsigned int added = MAX_DATA_SIZE - buf->used;
- if(added > size)
- added = size;
- if(added == 0)
- return 0;
- memcpy(buf->data + buf->used, ptr, added);
- buf->used += added;
- buf->total_in += added;
- return added;
-}
-
-static unsigned int buffer_tobuffer(buffer_t *to, buffer_t *from, int cap)
-{
- unsigned int moved, tomove = from->used;
- if((int)tomove > cap)
- tomove = cap;
- if(tomove == 0)
- return 0;
- moved = buffer_adddata(to, from->data, tomove);
- if(moved == 0)
- return 0;
- buffer_takedata(from, NULL, moved);
- return moved;
-}
-#endif
-
-static unsigned int buffer_takedata(buffer_t *buf, unsigned char *ptr,
- unsigned int size)
-{
- unsigned int taken = buf->used;
- if(taken > size)
- taken = size;
- if(taken == 0)
- return 0;
- if(ptr)
- memcpy(ptr, buf->data, taken);
- buf->used -= taken;
- /* Do we have to scroll? */
- if(buf->used > 0)
- memmove(buf->data, buf->data + taken, buf->used);
- return taken;
-}
-
-#ifndef NO_IP
-
-int buffer_from_fd(buffer_t *buf, int fd)
-{
- int toread = buffer_unused(buf);
- if(toread == 0)
- /* Shouldn't be called in this case! */
- abort();
- toread = read(fd, buf->data + buf->used, toread);
- if(toread > 0) {
- buf->used += toread;
- buf->total_in += toread;
- }
- return toread;
-}
-
-int buffer_to_fd(buffer_t *buf, int fd)
-{
- int towrite = buffer_used(buf);
- if(towrite == 0)
- /* Shouldn't be called in this case! */
- abort();
- towrite = write(fd, buf->data, towrite);
- if(towrite > 0) {
- buffer_takedata(buf, NULL, towrite);
- buf->total_out += towrite;
- }
- return towrite;
-}
-
-#endif /* !defined(NO_IP) */
-
-#ifndef NO_OPENSSL
-
-static void int_ssl_check(SSL *s, int ret)
-{
- int e = SSL_get_error(s, ret);
- switch(e) {
- /* These seem to be harmless and already "dealt with" by our
- * non-blocking environment. NB: "ZERO_RETURN" is the clean
- * "error" indicating a successfully closed SSL tunnel. We let
- * this happen because our IO loop should not appear to have
- * broken on this condition - and outside the IO loop, the
- * "shutdown" state is checked. */
- case SSL_ERROR_NONE:
- case SSL_ERROR_WANT_READ:
- case SSL_ERROR_WANT_WRITE:
- case SSL_ERROR_WANT_X509_LOOKUP:
- case SSL_ERROR_ZERO_RETURN:
- return;
- /* These seem to be indications of a genuine error that should
- * result in the SSL tunnel being regarded as "dead". */
- case SSL_ERROR_SYSCALL:
- case SSL_ERROR_SSL:
- SSL_set_app_data(s, (char *)1);
- return;
- default:
- break;
- }
- /* For any other errors that (a) exist, and (b) crop up - we need to
- * interpret what to do with them - so "politely inform" the caller that
- * the code needs updating here. */
- abort();
-}
-
-void buffer_from_SSL(buffer_t *buf, SSL *ssl)
-{
- int ret;
- if(!ssl || buffer_full(buf))
- return;
- ret = SSL_read(ssl, buf->data + buf->used, buffer_unused(buf));
- if(ret > 0) {
- buf->used += ret;
- buf->total_in += ret;
- }
- if(ret < 0)
- int_ssl_check(ssl, ret);
-}
-
-void buffer_to_SSL(buffer_t *buf, SSL *ssl)
-{
- int ret;
- if(!ssl || buffer_empty(buf))
- return;
- ret = SSL_write(ssl, buf->data, buf->used);
- if(ret > 0) {
- buffer_takedata(buf, NULL, ret);
- buf->total_out += ret;
- }
- if(ret < 0)
- int_ssl_check(ssl, ret);
-}
-
-void buffer_from_BIO(buffer_t *buf, BIO *bio)
-{
- int ret;
- if(!bio || buffer_full(buf))
- return;
- ret = BIO_read(bio, buf->data + buf->used, buffer_unused(buf));
- if(ret > 0) {
- buf->used += ret;
- buf->total_in += ret;
- }
-}
-
-void buffer_to_BIO(buffer_t *buf, BIO *bio)
-{
- int ret;
- if(!bio || buffer_empty(buf))
- return;
- ret = BIO_write(bio, buf->data, buf->used);
- if(ret > 0) {
- buffer_takedata(buf, NULL, ret);
- buf->total_out += ret;
- }
-}
-
-#endif /* !defined(NO_OPENSSL) */
-
-#endif /* !defined(NO_BUFFER) */
+++ /dev/null
-#include "tunala.h"
-
-#ifndef NO_OPENSSL
-
-/* For callbacks generating output, here are their file-descriptors. */
-static FILE *fp_cb_ssl_info = NULL;
-static FILE *fp_cb_ssl_verify = NULL;
-/* Output level:
- * 0 = nothing,
- * 1 = minimal, just errors,
- * 2 = minimal, all steps,
- * 3 = detail, all steps */
-static unsigned int cb_ssl_verify_level = 1;
-
-/* Other static rubbish (to mirror s_cb.c where required) */
-static int int_verify_depth = 10;
-
-/* This function is largely borrowed from the one used in OpenSSL's "s_client"
- * and "s_server" utilities. */
-void cb_ssl_info(const SSL *s, int where, int ret)
-{
- const char *str1, *str2;
- int w;
-
- if(!fp_cb_ssl_info)
- return;
-
- w = where & ~SSL_ST_MASK;
- str1 = (w & SSL_ST_CONNECT ? "SSL_connect" : (w & SSL_ST_ACCEPT ?
- "SSL_accept" : "undefined")),
- str2 = SSL_state_string_long(s);
-
- if (where & SSL_CB_LOOP)
- fprintf(fp_cb_ssl_info, "(%s) %s\n", str1, str2);
- else if (where & SSL_CB_EXIT) {
- if (ret == 0)
- fprintf(fp_cb_ssl_info, "(%s) failed in %s\n", str1, str2);
-/* In a non-blocking model, we get a few of these "error"s simply because we're
- * calling "reads" and "writes" on the state-machine that are virtual NOPs
- * simply to avoid wasting the time seeing if we *should* call them. Removing
- * this case makes the "-out_state" output a lot easier on the eye. */
-#if 0
- else if (ret < 0)
- fprintf(fp_cb_ssl_info, "%s:error in %s\n", str1, str2);
-#endif
- }
-}
-
-void cb_ssl_info_set_output(FILE *fp)
-{
- fp_cb_ssl_info = fp;
-}
-
-static const char *int_reason_no_issuer = "X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT";
-static const char *int_reason_not_yet = "X509_V_ERR_CERT_NOT_YET_VALID";
-static const char *int_reason_before = "X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD";
-static const char *int_reason_expired = "X509_V_ERR_CERT_HAS_EXPIRED";
-static const char *int_reason_after = "X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD";
-
-/* Stolen wholesale from apps/s_cb.c :-) And since then, mutilated ... */
-int cb_ssl_verify(int ok, X509_STORE_CTX *ctx)
-{
- char buf1[256]; /* Used for the subject name */
- char buf2[256]; /* Used for the issuer name */
- const char *reason = NULL; /* Error reason (if any) */
- X509 *err_cert;
- int err, depth;
-
- if(!fp_cb_ssl_verify || (cb_ssl_verify_level == 0))
- return ok;
- err_cert = X509_STORE_CTX_get_current_cert(ctx);
- err = X509_STORE_CTX_get_error(ctx);
- depth = X509_STORE_CTX_get_error_depth(ctx);
-
- buf1[0] = buf2[0] = '\0';
- /* Fill buf1 */
- X509_NAME_oneline(X509_get_subject_name(err_cert), buf1, 256);
- /* Fill buf2 */
- X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf2, 256);
- switch (ctx->error) {
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
- reason = int_reason_no_issuer;
- break;
- case X509_V_ERR_CERT_NOT_YET_VALID:
- reason = int_reason_not_yet;
- break;
- case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
- reason = int_reason_before;
- break;
- case X509_V_ERR_CERT_HAS_EXPIRED:
- reason = int_reason_expired;
- break;
- case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
- reason = int_reason_after;
- break;
- }
-
- if((cb_ssl_verify_level == 1) && ok)
- return ok;
- fprintf(fp_cb_ssl_verify, "chain-depth=%d, ", depth);
- if(reason)
- fprintf(fp_cb_ssl_verify, "error=%s\n", reason);
- else
- fprintf(fp_cb_ssl_verify, "error=%d\n", err);
- if(cb_ssl_verify_level < 3)
- return ok;
- fprintf(fp_cb_ssl_verify, "--> subject = %s\n", buf1);
- fprintf(fp_cb_ssl_verify, "--> issuer = %s\n", buf2);
- if(!ok)
- fprintf(fp_cb_ssl_verify,"--> verify error:num=%d:%s\n",err,
- X509_verify_cert_error_string(err));
- fprintf(fp_cb_ssl_verify, "--> verify return:%d\n",ok);
- return ok;
-}
-
-void cb_ssl_verify_set_output(FILE *fp)
-{
- fp_cb_ssl_verify = fp;
-}
-
-void cb_ssl_verify_set_depth(unsigned int verify_depth)
-{
- int_verify_depth = verify_depth;
-}
-
-void cb_ssl_verify_set_level(unsigned int level)
-{
- if(level < 4)
- cb_ssl_verify_level = level;
-}
-
-RSA *cb_generate_tmp_rsa(SSL *s, int is_export, int keylength)
-{
- /* TODO: Perhaps make it so our global key can be generated on-the-fly
- * after certain intervals? */
- static RSA *rsa_tmp = NULL;
- BIGNUM *bn = NULL;
- int ok = 1;
- if(!rsa_tmp) {
- ok = 0;
- if(!(bn = BN_new()))
- goto end;
- if(!BN_set_word(bn, RSA_F4))
- goto end;
- if(!(rsa_tmp = RSA_new()))
- goto end;
- if(!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL))
- goto end;
- ok = 1;
- }
-end:
- if(bn)
- BN_free(bn);
- if(!ok) {
- RSA_free(rsa_tmp);
- rsa_tmp = NULL;
- }
- return rsa_tmp;
-}
-
-#endif /* !defined(NO_OPENSSL) */
-
+++ /dev/null
-dnl Process this file with autoconf to produce a configure script.
-AC_INIT(tunala.c)
-AM_CONFIG_HEADER(config.h)
-AM_INIT_AUTOMAKE(tunala, 0.0.1-dev)
-
-dnl Checks for programs. (Though skip libtool)
-AC_PROG_CC
-dnl AC_PROG_LIBTOOL
-dnl AM_PROG_LIBTOOL
-
-dnl Checks for libraries.
-AC_CHECK_LIB(dl, dlopen)
-AC_CHECK_LIB(z, inflate)
-AC_CHECK_LIB(socket, socket)
-AC_CHECK_LIB(nsl, gethostbyname)
-
-dnl Checks for header files.
-AC_HEADER_STDC
-AC_CHECK_HEADERS(fcntl.h limits.h unistd.h)
-
-dnl Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-
-dnl Checks for library functions.
-AC_CHECK_FUNCS(strstr strtoul)
-AC_CHECK_FUNCS(select socket)
-AC_CHECK_FUNCS(dlopen)
-
-AC_OUTPUT(Makefile)
+++ /dev/null
-#include "tunala.h"
-
-#ifndef NO_IP
-
-#define IP_LISTENER_BACKLOG 511 /* So if it gets masked by 256 or some other
- such value it'll still be respectable */
-
-/* Any IP-related initialisations. For now, this means blocking SIGPIPE */
-int ip_initialise(void)
-{
- struct sigaction sa;
-
- sa.sa_handler = SIG_IGN;
- sa.sa_flags = 0;
- sigemptyset(&sa.sa_mask);
- if(sigaction(SIGPIPE, &sa, NULL) != 0)
- return 0;
- return 1;
-}
-
-int ip_create_listener_split(const char *ip, unsigned short port)
-{
- struct sockaddr_in in_addr;
- int fd = -1;
- int reuseVal = 1;
-
- /* Create the socket */
- if((fd = socket(PF_INET, SOCK_STREAM, 0)) == -1)
- goto err;
- /* Set the SO_REUSEADDR flag - servers act weird without it */
- if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)(&reuseVal),
- sizeof(reuseVal)) != 0)
- goto err;
- /* Prepare the listen address stuff */
- in_addr.sin_family = AF_INET;
- memcpy(&in_addr.sin_addr.s_addr, ip, 4);
- in_addr.sin_port = htons(port);
- /* Bind to the required port/address/interface */
- if(bind(fd, (struct sockaddr *)&in_addr, sizeof(struct sockaddr_in)) != 0)
- goto err;
- /* Start "listening" */
- if(listen(fd, IP_LISTENER_BACKLOG) != 0)
- goto err;
- return fd;
-err:
- if(fd != -1)
- close(fd);
- return -1;
-}
-
-int ip_create_connection_split(const char *ip, unsigned short port)
-{
- struct sockaddr_in in_addr;
- int flags, fd = -1;
-
- /* Create the socket */
- if((fd = socket(PF_INET, SOCK_STREAM, 0)) == -1)
- goto err;
- /* Make it non-blocking */
- if(((flags = fcntl(fd, F_GETFL, 0)) < 0) ||
- (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0))
- goto err;
- /* Prepare the connection address stuff */
- in_addr.sin_family = AF_INET;
- memcpy(&in_addr.sin_addr.s_addr, ip, 4);
- in_addr.sin_port = htons(port);
- /* Start a connect (non-blocking, in all likelihood) */
- if((connect(fd, (struct sockaddr *)&in_addr,
- sizeof(struct sockaddr_in)) != 0) &&
- (errno != EINPROGRESS))
- goto err;
- return fd;
-err:
- if(fd != -1)
- close(fd);
- return -1;
-}
-
-static char all_local_ip[] = {0x00,0x00,0x00,0x00};
-
-int ip_parse_address(const char *address, const char **parsed_ip,
- unsigned short *parsed_port, int accept_all_ip)
-{
- char buf[256];
- struct hostent *lookup;
- unsigned long port;
- const char *ptr = strstr(address, ":");
- const char *ip = all_local_ip;
-
- if(!ptr) {
- /* We assume we're listening on all local interfaces and have
- * only specified a port. */
- if(!accept_all_ip)
- return 0;
- ptr = address;
- goto determine_port;
- }
- if((ptr - address) > 255)
- return 0;
- memset(buf, 0, 256);
- memcpy(buf, address, ptr - address);
- ptr++;
- if((lookup = gethostbyname(buf)) == NULL) {
- /* Spit a message to differentiate between lookup failures and
- * bad strings. */
- fprintf(stderr, "hostname lookup for '%s' failed\n", buf);
- return 0;
- }
- ip = lookup->h_addr_list[0];
-determine_port:
- if(strlen(ptr) < 1)
- return 0;
- if(!int_strtoul(ptr, &port) || (port > 65535))
- return 0;
- *parsed_ip = ip;
- *parsed_port = (unsigned short)port;
- return 1;
-}
-
-int ip_create_listener(const char *address)
-{
- const char *ip;
- unsigned short port;
-
- if(!ip_parse_address(address, &ip, &port, 1))
- return -1;
- return ip_create_listener_split(ip, port);
-}
-
-int ip_create_connection(const char *address)
-{
- const char *ip;
- unsigned short port;
-
- if(!ip_parse_address(address, &ip, &port, 0))
- return -1;
- return ip_create_connection_split(ip, port);
-}
-
-int ip_accept_connection(int listen_fd)
-{
- return accept(listen_fd, NULL, NULL);
-}
-
-#endif /* !defined(NO_IP) */
-
+++ /dev/null
-#include "tunala.h"
-
-#ifndef NO_TUNALA
-
-void state_machine_init(state_machine_t *machine)
-{
- machine->ssl = NULL;
- machine->bio_intossl = machine->bio_fromssl = NULL;
- buffer_init(&machine->clean_in);
- buffer_init(&machine->clean_out);
- buffer_init(&machine->dirty_in);
- buffer_init(&machine->dirty_out);
-}
-
-void state_machine_close(state_machine_t *machine)
-{
- if(machine->ssl)
- SSL_free(machine->ssl);
-/* SSL_free seems to decrement the reference counts already so doing this goes
- * kaboom. */
-#if 0
- if(machine->bio_intossl)
- BIO_free(machine->bio_intossl);
- if(machine->bio_fromssl)
- BIO_free(machine->bio_fromssl);
-#endif
- buffer_close(&machine->clean_in);
- buffer_close(&machine->clean_out);
- buffer_close(&machine->dirty_in);
- buffer_close(&machine->dirty_out);
- state_machine_init(machine);
-}
-
-buffer_t *state_machine_get_buffer(state_machine_t *machine, sm_buffer_t type)
-{
- switch(type) {
- case SM_CLEAN_IN:
- return &machine->clean_in;
- case SM_CLEAN_OUT:
- return &machine->clean_out;
- case SM_DIRTY_IN:
- return &machine->dirty_in;
- case SM_DIRTY_OUT:
- return &machine->dirty_out;
- default:
- break;
- }
- /* Should never get here */
- abort();
- return NULL;
-}
-
-SSL *state_machine_get_SSL(state_machine_t *machine)
-{
- return machine->ssl;
-}
-
-int state_machine_set_SSL(state_machine_t *machine, SSL *ssl, int is_server)
-{
- if(machine->ssl)
- /* Shouldn't ever be set twice */
- abort();
- machine->ssl = ssl;
- /* Create the BIOs to handle the dirty side of the SSL */
- if((machine->bio_intossl = BIO_new(BIO_s_mem())) == NULL)
- abort();
- if((machine->bio_fromssl = BIO_new(BIO_s_mem())) == NULL)
- abort();
- /* Hook up the BIOs on the dirty side of the SSL */
- SSL_set_bio(machine->ssl, machine->bio_intossl, machine->bio_fromssl);
- if(is_server)
- SSL_set_accept_state(machine->ssl);
- else
- SSL_set_connect_state(machine->ssl);
- /* If we're the first one to generate traffic - do it now otherwise we
- * go into the next select empty-handed and our peer will not send data
- * but will similarly wait for us. */
- return state_machine_churn(machine);
-}
-
-/* Performs the data-IO loop and returns zero if the machine should close */
-int state_machine_churn(state_machine_t *machine)
-{
- unsigned int loop;
- if(machine->ssl == NULL) {
- if(buffer_empty(&machine->clean_out))
- /* Time to close this state-machine altogether */
- return 0;
- else
- /* Still buffered data on the clean side to go out */
- return 1;
- }
- /* Do this loop twice to cover any dependencies about which precise
- * order of reads and writes is required. */
- for(loop = 0; loop < 2; loop++) {
- buffer_to_SSL(&machine->clean_in, machine->ssl);
- buffer_to_BIO(&machine->dirty_in, machine->bio_intossl);
- buffer_from_SSL(&machine->clean_out, machine->ssl);
- buffer_from_BIO(&machine->dirty_out, machine->bio_fromssl);
- }
- /* We close on the SSL side if the info callback noticed some problems
- * or an SSL shutdown was underway and shutdown traffic had all been
- * sent. */
- if(SSL_get_app_data(machine->ssl) || (SSL_get_shutdown(machine->ssl) &&
- buffer_empty(&machine->dirty_out))) {
- /* Great, we can seal off the dirty side completely */
- if(!state_machine_close_dirty(machine))
- return 0;
- }
- /* Either the SSL is alive and well, or the closing process still has
- * outgoing data waiting to be sent */
- return 1;
-}
-
-/* Called when the clean side of the SSL has lost its connection */
-int state_machine_close_clean(state_machine_t *machine)
-{
- /* Well, first thing to do is null out the clean-side buffers - they're
- * no use any more. */
- buffer_close(&machine->clean_in);
- buffer_close(&machine->clean_out);
- /* And start an SSL shutdown */
- if(machine->ssl)
- SSL_shutdown(machine->ssl);
- /* This is an "event", so flush the SSL of any generated traffic */
- state_machine_churn(machine);
- if(buffer_empty(&machine->dirty_in) &&
- buffer_empty(&machine->dirty_out))
- return 0;
- return 1;
-}
-
-/* Called when the dirty side of the SSL has lost its connection. This is pretty
- * terminal as all that can be left to do is send any buffered output on the
- * clean side - after that, we're done. */
-int state_machine_close_dirty(state_machine_t *machine)
-{
- buffer_close(&machine->dirty_in);
- buffer_close(&machine->dirty_out);
- buffer_close(&machine->clean_in);
- if(machine->ssl)
- SSL_free(machine->ssl);
- machine->ssl = NULL;
- machine->bio_intossl = machine->bio_fromssl = NULL;
- if(buffer_empty(&machine->clean_out))
- return 0;
- return 1;
-}
-
-#endif /* !defined(NO_TUNALA) */
-
+++ /dev/null
-#!/bin/sh
-
-HTTP="localhost:8080"
-CLIENT_PORT="9020"
-SERVER_PORT="9021"
-
-sub_test ()
-{
- echo "STARTING - $VER $CIPHER"
- ./tunala -listen localhost:$CLIENT_PORT -proxy localhost:$SERVER_PORT \
- -cacert CA.pem -cert A-client.pem -server 0 \
- -dh_special standard -v_peer -v_strict \
- $VER -cipher $CIPHER 1> tc1.txt 2> tc2.txt &
- ./tunala -listen localhost:$SERVER_PORT -proxy $HTTP \
- -cacert CA.pem -cert A-server.pem -server 1 \
- -dh_special standard -v_peer -v_strict \
- $VER -cipher $CIPHER 1> ts1.txt 2> ts2.txt &
- # Wait for the servers to be listening before starting the wget test
- DONE="no"
- while [ "$DONE" != "yes" ]; do
- L1=`netstat -a | egrep "LISTEN[\t ]*$" | grep ":$CLIENT_PORT"`
- L2=`netstat -a | egrep "LISTEN[\t ]*$" | grep ":$SERVER_PORT"`
- if [ "x$L1" != "x" ]; then
- DONE="yes"
- elif [ "x$L2" != "x" ]; then
- DONE="yes"
- else
- sleep 1
- fi
- done
- HTML=`wget -O - -T 1 http://localhost:$CLIENT_PORT 2> /dev/null | grep "<HTML>"`
- if [ "x$HTML" != "x" ]; then
- echo "OK - $CIPHER ($VER)"
- else
- echo "FAIL - $CIPHER ($VER)"
- killall tunala
- exit 1
- fi
- killall tunala
- # Wait for the servers to stop before returning - otherwise the next
- # test my fail to start ... (fscking race conditions)
- DONE="yes"
- while [ "$DONE" != "no" ]; do
- L1=`netstat -a | egrep "LISTEN[\t ]*$" | grep ":$CLIENT_PORT"`
- L2=`netstat -a | egrep "LISTEN[\t ]*$" | grep ":$SERVER_PORT"`
- if [ "x$L1" != "x" ]; then
- DONE="yes"
- elif [ "x$L2" != "x" ]; then
- DONE="yes"
- else
- DONE="no"
- fi
- done
- exit 0
-}
-
-run_test ()
-{
- (sub_test 1> /dev/null) || exit 1
-}
-
-run_ssl_test ()
-{
-killall tunala 1> /dev/null 2> /dev/null
-echo ""
-echo "Starting all $PRETTY tests"
-if [ "$PRETTY" != "SSLv2" ]; then
- if [ "$PRETTY" != "SSLv3" ]; then
- export VER="-no_ssl2 -no_ssl3"
- export OSSL="-tls1"
- else
- export VER="-no_ssl2 -no_tls1"
- export OSSL="-ssl3"
- fi
-else
- export VER="-no_ssl3 -no_tls1"
- export OSSL="-ssl2"
-fi
-LIST="`../../apps/openssl ciphers $OSSL | sed -e 's/:/ /g'`"
-#echo "$LIST"
-for i in $LIST; do \
- DSS=`echo "$i" | grep "DSS"`
- if [ "x$DSS" != "x" ]; then
- echo "---- skipping $i (no DSA cert/keys) ----"
- else
- export CIPHER=$i
- run_test
- echo "SUCCESS: $i"
- fi
-done;
-}
-
-# Welcome the user
-echo "Tests will assume an http server running at $HTTP"
-
-# TLSv1 test
-export PRETTY="TLSv1"
-run_ssl_test
-
-# SSLv3 test
-export PRETTY="SSLv3"
-run_ssl_test
-
-# SSLv2 test
-export PRETTY="SSLv2"
-run_ssl_test
-
+++ /dev/null
-#if defined(NO_BUFFER) || defined(NO_IP) || defined(NO_OPENSSL)
-#error "Badness, NO_BUFFER, NO_IP or NO_OPENSSL is defined, turn them *off*"
-#endif
-
-/* Include our bits'n'pieces */
-#include "tunala.h"
-
-
-/********************************************/
-/* Our local types that specify our "world" */
-/********************************************/
-
-/* These represent running "tunnels". Eg. if you wanted to do SSL in a
- * "message-passing" scanario, the "int" file-descriptors might be replaced by
- * thread or process IDs, and the "select" code might be replaced by message
- * handling code. Whatever. */
-typedef struct _tunala_item_t {
- /* The underlying SSL state machine. This is a data-only processing unit
- * and we communicate with it by talking to its four "buffers". */
- state_machine_t sm;
- /* The file-descriptors for the "dirty" (encrypted) side of the SSL
- * setup. In actuality, this is typically a socket and both values are
- * identical. */
- int dirty_read, dirty_send;
- /* The file-descriptors for the "clean" (unencrypted) side of the SSL
- * setup. These could be stdin/stdout, a socket (both values the same),
- * or whatever you like. */
- int clean_read, clean_send;
-} tunala_item_t;
-
-/* This structure is used as the data for running the main loop. Namely, in a
- * network format such as this, it is stuff for select() - but as pointed out,
- * when moving the real-world to somewhere else, this might be replaced by
- * something entirely different. It's basically the stuff that controls when
- * it's time to do some "work". */
-typedef struct _select_sets_t {
- int max; /* As required as the first argument to select() */
- fd_set reads, sends, excepts; /* As passed to select() */
-} select_sets_t;
-typedef struct _tunala_selector_t {
- select_sets_t last_selected; /* Results of the last select() */
- select_sets_t next_select; /* What we'll next select on */
-} tunala_selector_t;
-
-/* This structure is *everything*. We do it to avoid the use of globals so that,
- * for example, it would be easier to shift things around between async-IO,
- * thread-based, or multi-fork()ed (or combinations thereof). */
-typedef struct _tunala_world_t {
- /* The file-descriptor we "listen" on for new connections */
- int listen_fd;
- /* The array of tunnels */
- tunala_item_t *tunnels;
- /* the number of tunnels in use and allocated, respectively */
- unsigned int tunnels_used, tunnels_size;
- /* Our outside "loop" context stuff */
- tunala_selector_t selector;
- /* Our SSL_CTX, which is configured as the SSL client or server and has
- * the various cert-settings and callbacks configured. */
- SSL_CTX *ssl_ctx;
- /* Simple flag with complex logic :-) Indicates whether we're an SSL
- * server or an SSL client. */
- int server_mode;
-} tunala_world_t;
-
-/*****************************/
-/* Internal static functions */
-/*****************************/
-
-static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
- const char *CAfile, const char *cert, const char *key,
- const char *dcert, const char *dkey, const char *cipher_list,
- const char *dh_file, const char *dh_special, int tmp_rsa,
- int ctx_options, int out_state, int out_verify, int verify_mode,
- unsigned int verify_depth);
-static void selector_init(tunala_selector_t *selector);
-static void selector_add_listener(tunala_selector_t *selector, int fd);
-static void selector_add_tunala(tunala_selector_t *selector, tunala_item_t *t);
-static int selector_select(tunala_selector_t *selector);
-/* This returns -1 for error, 0 for no new connections, or 1 for success, in
- * which case *newfd is populated. */
-static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd);
-static int tunala_world_new_item(tunala_world_t *world, int fd,
- const char *ip, unsigned short port, int flipped);
-static void tunala_world_del_item(tunala_world_t *world, unsigned int idx);
-static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item);
-
-/*********************************************/
-/* MAIN FUNCTION (and its utility functions) */
-/*********************************************/
-
-static const char *def_proxyhost = "127.0.0.1:443";
-static const char *def_listenhost = "127.0.0.1:8080";
-static int def_max_tunnels = 50;
-static const char *def_cacert = NULL;
-static const char *def_cert = NULL;
-static const char *def_key = NULL;
-static const char *def_dcert = NULL;
-static const char *def_dkey = NULL;
-static const char *def_engine_id = NULL;
-static int def_server_mode = 0;
-static int def_flipped = 0;
-static const char *def_cipher_list = NULL;
-static const char *def_dh_file = NULL;
-static const char *def_dh_special = NULL;
-static int def_tmp_rsa = 1;
-static int def_ctx_options = 0;
-static int def_verify_mode = 0;
-static unsigned int def_verify_depth = 10;
-static int def_out_state = 0;
-static unsigned int def_out_verify = 0;
-static int def_out_totals = 0;
-static int def_out_conns = 0;
-
-static const char *helpstring =
-"\n'Tunala' (A tunneler with a New Zealand accent)\n"
-"Usage: tunala [options], where options are from;\n"
-" -listen [host:]<port> (default = 127.0.0.1:8080)\n"
-" -proxy <host>:<port> (default = 127.0.0.1:443)\n"
-" -maxtunnels <num> (default = 50)\n"
-" -cacert <path|NULL> (default = NULL)\n"
-" -cert <path|NULL> (default = NULL)\n"
-" -key <path|NULL> (default = whatever '-cert' is)\n"
-" -dcert <path|NULL> (usually for DSA, default = NULL)\n"
-" -dkey <path|NULL> (usually for DSA, default = whatever '-dcert' is)\n"
-" -engine <id|NULL> (default = NULL)\n"
-" -server <0|1> (default = 0, ie. an SSL client)\n"
-" -flipped <0|1> (makes SSL servers be network clients, and vice versa)\n"
-" -cipher <list> (specifies cipher list to use)\n"
-" -dh_file <path> (a PEM file containing DH parameters to use)\n"
-" -dh_special <NULL|generate|standard> (see below: def=NULL)\n"
-" -no_tmp_rsa (don't generate temporary RSA keys)\n"
-" -no_ssl2 (disable SSLv2)\n"
-" -no_ssl3 (disable SSLv3)\n"
-" -no_tls1 (disable TLSv1)\n"
-" -v_peer (verify the peer certificate)\n"
-" -v_strict (do not continue if peer doesn't authenticate)\n"
-" -v_once (no verification in renegotiates)\n"
-" -v_depth <num> (limit certificate chain depth, default = 10)\n"
-" -out_conns (prints client connections and disconnections)\n"
-" -out_state (prints SSL handshake states)\n"
-" -out_verify <0|1|2|3> (prints certificate verification states: def=1)\n"
-" -out_totals (prints out byte-totals when a tunnel closes)\n"
-" -<h|help|?> (displays this help screen)\n"
-"Notes:\n"
-"(1) It is recommended to specify a cert+key when operating as an SSL server.\n"
-" If you only specify '-cert', the same file must contain a matching\n"
-" private key.\n"
-"(2) Either dh_file or dh_special can be used to specify where DH parameters\n"
-" will be obtained from (or '-dh_special NULL' for the default choice) but\n"
-" you cannot specify both. For dh_special, 'generate' will create new DH\n"
-" parameters on startup, and 'standard' will use embedded parameters\n"
-" instead.\n"
-"(3) Normally an ssl client connects to an ssl server - so that an 'ssl client\n"
-" tunala' listens for 'clean' client connections and proxies ssl, and an\n"
-" 'ssl server tunala' listens for ssl connections and proxies 'clean'. With\n"
-" '-flipped 1', this behaviour is reversed so that an 'ssl server tunala'\n"
-" listens for clean client connections and proxies ssl (but participating\n"
-" as an ssl *server* in the SSL/TLS protocol), and an 'ssl client tunala'\n"
-" listens for ssl connections (participating as an ssl *client* in the\n"
-" SSL/TLS protocol) and proxies 'clean' to the end destination. This can\n"
-" be useful for allowing network access to 'servers' where only the server\n"
-" needs to authenticate the client (ie. the other way is not required).\n"
-" Even with client and server authentication, this 'technique' mitigates\n"
-" some DoS (denial-of-service) potential as it will be the network client\n"
-" having to perform the first private key operation rather than the other\n"
-" way round.\n"
-"(4) The 'technique' used by setting '-flipped 1' is probably compatible with\n"
-" absolutely nothing except another complimentary instance of 'tunala'\n"
-" running with '-flipped 1'. :-)\n";
-
-/* Default DH parameters for use with "-dh_special standard" ... stolen striaght
- * from s_server. */
-static unsigned char dh512_p[]={
- 0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
- 0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
- 0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
- 0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
- 0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
- 0x47,0x74,0xE8,0x33,
- };
-static unsigned char dh512_g[]={
- 0x02,
- };
-
-/* And the function that parses the above "standard" parameters, again, straight
- * out of s_server. */
-static DH *get_dh512(void)
- {
- DH *dh=NULL;
-
- if ((dh=DH_new()) == NULL) return(NULL);
- dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
- dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
- if ((dh->p == NULL) || (dh->g == NULL))
- return(NULL);
- return(dh);
- }
-
-/* Various help/error messages used by main() */
-static int usage(const char *errstr, int isunknownarg)
-{
- if(isunknownarg)
- fprintf(stderr, "Error: unknown argument '%s'\n", errstr);
- else
- fprintf(stderr, "Error: %s\n", errstr);
- fprintf(stderr, "%s\n", helpstring);
- return 1;
-}
-
-static int err_str0(const char *str0)
-{
- fprintf(stderr, "%s\n", str0);
- return 1;
-}
-
-static int err_str1(const char *fmt, const char *str1)
-{
- fprintf(stderr, fmt, str1);
- fprintf(stderr, "\n");
- return 1;
-}
-
-static int parse_max_tunnels(const char *s, unsigned int *maxtunnels)
-{
- unsigned long l;
- if(!int_strtoul(s, &l) || (l < 1) || (l > 1024)) {
- fprintf(stderr, "Error, '%s' is an invalid value for "
- "maxtunnels\n", s);
- return 0;
- }
- *maxtunnels = (unsigned int)l;
- return 1;
-}
-
-static int parse_server_mode(const char *s, int *servermode)
-{
- unsigned long l;
- if(!int_strtoul(s, &l) || (l > 1)) {
- fprintf(stderr, "Error, '%s' is an invalid value for the "
- "server mode\n", s);
- return 0;
- }
- *servermode = (int)l;
- return 1;
-}
-
-static int parse_dh_special(const char *s, const char **dh_special)
-{
- if((strcmp(s, "NULL") == 0) || (strcmp(s, "generate") == 0) ||
- (strcmp(s, "standard") == 0)) {
- *dh_special = s;
- return 1;
- }
- fprintf(stderr, "Error, '%s' is an invalid value for 'dh_special'\n", s);
- return 0;
-}
-
-static int parse_verify_level(const char *s, unsigned int *verify_level)
-{
- unsigned long l;
- if(!int_strtoul(s, &l) || (l > 3)) {
- fprintf(stderr, "Error, '%s' is an invalid value for "
- "out_verify\n", s);
- return 0;
- }
- *verify_level = (unsigned int)l;
- return 1;
-}
-
-static int parse_verify_depth(const char *s, unsigned int *verify_depth)
-{
- unsigned long l;
- if(!int_strtoul(s, &l) || (l < 1) || (l > 50)) {
- fprintf(stderr, "Error, '%s' is an invalid value for "
- "verify_depth\n", s);
- return 0;
- }
- *verify_depth = (unsigned int)l;
- return 1;
-}
-
-/* Some fprintf format strings used when tunnels close */
-static const char *io_stats_dirty =
-" SSL traffic; %8lu bytes in, %8lu bytes out\n";
-static const char *io_stats_clean =
-" clear traffic; %8lu bytes in, %8lu bytes out\n";
-
-int main(int argc, char *argv[])
-{
- unsigned int loop;
- int newfd;
- tunala_world_t world;
- tunala_item_t *t_item;
- const char *proxy_ip;
- unsigned short proxy_port;
- /* Overridables */
- const char *proxyhost = def_proxyhost;
- const char *listenhost = def_listenhost;
- unsigned int max_tunnels = def_max_tunnels;
- const char *cacert = def_cacert;
- const char *cert = def_cert;
- const char *key = def_key;
- const char *dcert = def_dcert;
- const char *dkey = def_dkey;
- const char *engine_id = def_engine_id;
- int server_mode = def_server_mode;
- int flipped = def_flipped;
- const char *cipher_list = def_cipher_list;
- const char *dh_file = def_dh_file;
- const char *dh_special = def_dh_special;
- int tmp_rsa = def_tmp_rsa;
- int ctx_options = def_ctx_options;
- int verify_mode = def_verify_mode;
- unsigned int verify_depth = def_verify_depth;
- int out_state = def_out_state;
- unsigned int out_verify = def_out_verify;
- int out_totals = def_out_totals;
- int out_conns = def_out_conns;
-
-/* Parse command-line arguments */
-next_arg:
- argc--; argv++;
- if(argc > 0) {
- if(strcmp(*argv, "-listen") == 0) {
- if(argc < 2)
- return usage("-listen requires an argument", 0);
- argc--; argv++;
- listenhost = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-proxy") == 0) {
- if(argc < 2)
- return usage("-proxy requires an argument", 0);
- argc--; argv++;
- proxyhost = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-maxtunnels") == 0) {
- if(argc < 2)
- return usage("-maxtunnels requires an argument", 0);
- argc--; argv++;
- if(!parse_max_tunnels(*argv, &max_tunnels))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-cacert") == 0) {
- if(argc < 2)
- return usage("-cacert requires an argument", 0);
- argc--; argv++;
- if(strcmp(*argv, "NULL") == 0)
- cacert = NULL;
- else
- cacert = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-cert") == 0) {
- if(argc < 2)
- return usage("-cert requires an argument", 0);
- argc--; argv++;
- if(strcmp(*argv, "NULL") == 0)
- cert = NULL;
- else
- cert = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-key") == 0) {
- if(argc < 2)
- return usage("-key requires an argument", 0);
- argc--; argv++;
- if(strcmp(*argv, "NULL") == 0)
- key = NULL;
- else
- key = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-dcert") == 0) {
- if(argc < 2)
- return usage("-dcert requires an argument", 0);
- argc--; argv++;
- if(strcmp(*argv, "NULL") == 0)
- dcert = NULL;
- else
- dcert = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-dkey") == 0) {
- if(argc < 2)
- return usage("-dkey requires an argument", 0);
- argc--; argv++;
- if(strcmp(*argv, "NULL") == 0)
- dkey = NULL;
- else
- dkey = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-engine") == 0) {
- if(argc < 2)
- return usage("-engine requires an argument", 0);
- argc--; argv++;
- engine_id = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-server") == 0) {
- if(argc < 2)
- return usage("-server requires an argument", 0);
- argc--; argv++;
- if(!parse_server_mode(*argv, &server_mode))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-flipped") == 0) {
- if(argc < 2)
- return usage("-flipped requires an argument", 0);
- argc--; argv++;
- if(!parse_server_mode(*argv, &flipped))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-cipher") == 0) {
- if(argc < 2)
- return usage("-cipher requires an argument", 0);
- argc--; argv++;
- cipher_list = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-dh_file") == 0) {
- if(argc < 2)
- return usage("-dh_file requires an argument", 0);
- if(dh_special)
- return usage("cannot mix -dh_file with "
- "-dh_special", 0);
- argc--; argv++;
- dh_file = *argv;
- goto next_arg;
- } else if(strcmp(*argv, "-dh_special") == 0) {
- if(argc < 2)
- return usage("-dh_special requires an argument", 0);
- if(dh_file)
- return usage("cannot mix -dh_file with "
- "-dh_special", 0);
- argc--; argv++;
- if(!parse_dh_special(*argv, &dh_special))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-no_tmp_rsa") == 0) {
- tmp_rsa = 0;
- goto next_arg;
- } else if(strcmp(*argv, "-no_ssl2") == 0) {
- ctx_options |= SSL_OP_NO_SSLv2;
- goto next_arg;
- } else if(strcmp(*argv, "-no_ssl3") == 0) {
- ctx_options |= SSL_OP_NO_SSLv3;
- goto next_arg;
- } else if(strcmp(*argv, "-no_tls1") == 0) {
- ctx_options |= SSL_OP_NO_TLSv1;
- goto next_arg;
- } else if(strcmp(*argv, "-v_peer") == 0) {
- verify_mode |= SSL_VERIFY_PEER;
- goto next_arg;
- } else if(strcmp(*argv, "-v_strict") == 0) {
- verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
- goto next_arg;
- } else if(strcmp(*argv, "-v_once") == 0) {
- verify_mode |= SSL_VERIFY_CLIENT_ONCE;
- goto next_arg;
- } else if(strcmp(*argv, "-v_depth") == 0) {
- if(argc < 2)
- return usage("-v_depth requires an argument", 0);
- argc--; argv++;
- if(!parse_verify_depth(*argv, &verify_depth))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-out_state") == 0) {
- out_state = 1;
- goto next_arg;
- } else if(strcmp(*argv, "-out_verify") == 0) {
- if(argc < 2)
- return usage("-out_verify requires an argument", 0);
- argc--; argv++;
- if(!parse_verify_level(*argv, &out_verify))
- return 1;
- goto next_arg;
- } else if(strcmp(*argv, "-out_totals") == 0) {
- out_totals = 1;
- goto next_arg;
- } else if(strcmp(*argv, "-out_conns") == 0) {
- out_conns = 1;
- goto next_arg;
- } else if((strcmp(*argv, "-h") == 0) ||
- (strcmp(*argv, "-help") == 0) ||
- (strcmp(*argv, "-?") == 0)) {
- fprintf(stderr, "%s\n", helpstring);
- return 0;
- } else
- return usage(*argv, 1);
- }
- /* Run any sanity checks we want here */
- if(!cert && !dcert && server_mode)
- fprintf(stderr, "WARNING: you are running an SSL server without "
- "a certificate - this may not work!\n");
-
- /* Initialise network stuff */
- if(!ip_initialise())
- return err_str0("ip_initialise failed");
- /* Create the SSL_CTX */
- if((world.ssl_ctx = initialise_ssl_ctx(server_mode, engine_id,
- cacert, cert, key, dcert, dkey, cipher_list, dh_file,
- dh_special, tmp_rsa, ctx_options, out_state, out_verify,
- verify_mode, verify_depth)) == NULL)
- return err_str1("initialise_ssl_ctx(engine_id=%s) failed",
- (engine_id == NULL) ? "NULL" : engine_id);
- if(engine_id)
- fprintf(stderr, "Info, engine '%s' initialised\n", engine_id);
- /* Create the listener */
- if((world.listen_fd = ip_create_listener(listenhost)) == -1)
- return err_str1("ip_create_listener(%s) failed", listenhost);
- fprintf(stderr, "Info, listening on '%s'\n", listenhost);
- if(!ip_parse_address(proxyhost, &proxy_ip, &proxy_port, 0))
- return err_str1("ip_parse_address(%s) failed", proxyhost);
- fprintf(stderr, "Info, proxying to '%s' (%d.%d.%d.%d:%d)\n", proxyhost,
- (int)proxy_ip[0], (int)proxy_ip[1],
- (int)proxy_ip[2], (int)proxy_ip[3], (int)proxy_port);
- fprintf(stderr, "Info, set maxtunnels to %d\n", (int)max_tunnels);
- fprintf(stderr, "Info, set to operate as an SSL %s\n",
- (server_mode ? "server" : "client"));
- /* Initialise the rest of the stuff */
- world.tunnels_used = world.tunnels_size = 0;
- world.tunnels = NULL;
- world.server_mode = server_mode;
- selector_init(&world.selector);
-
-/* We're ready to loop */
-main_loop:
- /* Should we listen for *new* tunnels? */
- if(world.tunnels_used < max_tunnels)
- selector_add_listener(&world.selector, world.listen_fd);
- /* We should add in our existing tunnels */
- for(loop = 0; loop < world.tunnels_used; loop++)
- selector_add_tunala(&world.selector, world.tunnels + loop);
- /* Now do the select */
- switch(selector_select(&world.selector)) {
- case -1:
- if(errno != EINTR) {
- fprintf(stderr, "selector_select returned a "
- "badness error.\n");
- goto shouldnt_happen;
- }
- fprintf(stderr, "Warn, selector interrupted by a signal\n");
- goto main_loop;
- case 0:
- fprintf(stderr, "Warn, selector_select returned 0 - signal?""?\n");
- goto main_loop;
- default:
- break;
- }
- /* Accept new connection if we should and can */
- if((world.tunnels_used < max_tunnels) && (selector_get_listener(
- &world.selector, world.listen_fd,
- &newfd) == 1)) {
- /* We have a new connection */
- if(!tunala_world_new_item(&world, newfd, proxy_ip,
- proxy_port, flipped))
- fprintf(stderr, "tunala_world_new_item failed\n");
- else if(out_conns)
- fprintf(stderr, "Info, new tunnel opened, now up to "
- "%d\n", world.tunnels_used);
- }
- /* Give each tunnel its moment, note the while loop is because it makes
- * the logic easier than with "for" to deal with an array that may shift
- * because of deletes. */
- loop = 0;
- t_item = world.tunnels;
- while(loop < world.tunnels_used) {
- if(!tunala_item_io(&world.selector, t_item)) {
- /* We're closing whether for reasons of an error or a
- * natural close. Don't increment loop or t_item because
- * the next item is moving to us! */
- if(!out_totals)
- goto skip_totals;
- fprintf(stderr, "Tunnel closing, traffic stats follow\n");
- /* Display the encrypted (over the network) stats */
- fprintf(stderr, io_stats_dirty,
- buffer_total_in(state_machine_get_buffer(
- &t_item->sm,SM_DIRTY_IN)),
- buffer_total_out(state_machine_get_buffer(
- &t_item->sm,SM_DIRTY_OUT)));
- /* Display the local (tunnelled) stats. NB: Data we
- * *receive* is data sent *out* of the state_machine on
- * its 'clean' side. Hence the apparent back-to-front
- * OUT/IN mixup here :-) */
- fprintf(stderr, io_stats_clean,
- buffer_total_out(state_machine_get_buffer(
- &t_item->sm,SM_CLEAN_OUT)),
- buffer_total_in(state_machine_get_buffer(
- &t_item->sm,SM_CLEAN_IN)));
-skip_totals:
- tunala_world_del_item(&world, loop);
- if(out_conns)
- fprintf(stderr, "Info, tunnel closed, down to %d\n",
- world.tunnels_used);
- }
- else {
- /* Move to the next item */
- loop++;
- t_item++;
- }
- }
- goto main_loop;
- /* Should never get here */
-shouldnt_happen:
- abort();
- return 1;
-}
-
-/****************/
-/* OpenSSL bits */
-/****************/
-
-static int ctx_set_cert(SSL_CTX *ctx, const char *cert, const char *key)
-{
- FILE *fp = NULL;
- X509 *x509 = NULL;
- EVP_PKEY *pkey = NULL;
- int toret = 0; /* Assume an error */
-
- /* cert */
- if(cert) {
- if((fp = fopen(cert, "r")) == NULL) {
- fprintf(stderr, "Error opening cert file '%s'\n", cert);
- goto err;
- }
- if(!PEM_read_X509(fp, &x509, NULL, NULL)) {
- fprintf(stderr, "Error reading PEM cert from '%s'\n",
- cert);
- goto err;
- }
- if(!SSL_CTX_use_certificate(ctx, x509)) {
- fprintf(stderr, "Error, cert in '%s' can not be used\n",
- cert);
- goto err;
- }
- /* Clear the FILE* for reuse in the "key" code */
- fclose(fp);
- fp = NULL;
- fprintf(stderr, "Info, operating with cert in '%s'\n", cert);
- /* If a cert was given without matching key, we assume the same
- * file contains the required key. */
- if(!key)
- key = cert;
- } else {
- if(key)
- fprintf(stderr, "Error, can't specify a key without a "
- "corresponding certificate\n");
- else
- fprintf(stderr, "Error, ctx_set_cert called with "
- "NULLs!\n");
- goto err;
- }
- /* key */
- if(key) {
- if((fp = fopen(key, "r")) == NULL) {
- fprintf(stderr, "Error opening key file '%s'\n", key);
- goto err;
- }
- if(!PEM_read_PrivateKey(fp, &pkey, NULL, NULL)) {
- fprintf(stderr, "Error reading PEM key from '%s'\n",
- key);
- goto err;
- }
- if(!SSL_CTX_use_PrivateKey(ctx, pkey)) {
- fprintf(stderr, "Error, key in '%s' can not be used\n",
- key);
- goto err;
- }
- fprintf(stderr, "Info, operating with key in '%s'\n", key);
- } else
- fprintf(stderr, "Info, operating without a cert or key\n");
- /* Success */
- toret = 1; err:
- if(x509)
- X509_free(x509);
- if(pkey)
- EVP_PKEY_free(pkey);
- if(fp)
- fclose(fp);
- return toret;
-}
-
-static int ctx_set_dh(SSL_CTX *ctx, const char *dh_file, const char *dh_special)
-{
- DH *dh = NULL;
- FILE *fp = NULL;
-
- if(dh_special) {
- if(strcmp(dh_special, "NULL") == 0)
- return 1;
- if(strcmp(dh_special, "standard") == 0) {
- if((dh = get_dh512()) == NULL) {
- fprintf(stderr, "Error, can't parse 'standard'"
- " DH parameters\n");
- return 0;
- }
- fprintf(stderr, "Info, using 'standard' DH parameters\n");
- goto do_it;
- }
- if(strcmp(dh_special, "generate") != 0)
- /* This shouldn't happen - screening values is handled
- * in main(). */
- abort();
- fprintf(stderr, "Info, generating DH parameters ... ");
- fflush(stderr);
- if(!(dh = DH_new()) || !DH_generate_parameters_ex(dh, 512,
- DH_GENERATOR_5, NULL)) {
- fprintf(stderr, "error!\n");
- if(dh)
- DH_free(dh);
- return 0;
- }
- fprintf(stderr, "complete\n");
- goto do_it;
- }
- /* So, we're loading dh_file */
- if((fp = fopen(dh_file, "r")) == NULL) {
- fprintf(stderr, "Error, couldn't open '%s' for DH parameters\n",
- dh_file);
- return 0;
- }
- dh = PEM_read_DHparams(fp, NULL, NULL, NULL);
- fclose(fp);
- if(dh == NULL) {
- fprintf(stderr, "Error, could not parse DH parameters from '%s'\n",
- dh_file);
- return 0;
- }
- fprintf(stderr, "Info, using DH parameters from file '%s'\n", dh_file);
-do_it:
- SSL_CTX_set_tmp_dh(ctx, dh);
- DH_free(dh);
- return 1;
-}
-
-static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
- const char *CAfile, const char *cert, const char *key,
- const char *dcert, const char *dkey, const char *cipher_list,
- const char *dh_file, const char *dh_special, int tmp_rsa,
- int ctx_options, int out_state, int out_verify, int verify_mode,
- unsigned int verify_depth)
-{
- SSL_CTX *ctx = NULL, *ret = NULL;
- const SSL_METHOD *meth;
- ENGINE *e = NULL;
-
- OpenSSL_add_ssl_algorithms();
- SSL_load_error_strings();
-
- meth = (server_mode ? SSLv23_server_method() : SSLv23_client_method());
- if(meth == NULL)
- goto err;
- if(engine_id) {
- ENGINE_load_builtin_engines();
- if((e = ENGINE_by_id(engine_id)) == NULL) {
- fprintf(stderr, "Error obtaining '%s' engine, openssl "
- "errors follow\n", engine_id);
- goto err;
- }
- if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
- fprintf(stderr, "Error assigning '%s' engine, openssl "
- "errors follow\n", engine_id);
- goto err;
- }
- ENGINE_free(e);
- }
- if((ctx = SSL_CTX_new(meth)) == NULL)
- goto err;
- /* cacert */
- if(CAfile) {
- if(!X509_STORE_load_locations(SSL_CTX_get_cert_store(ctx),
- CAfile, NULL)) {
- fprintf(stderr, "Error loading CA cert(s) in '%s'\n",
- CAfile);
- goto err;
- }
- fprintf(stderr, "Info, operating with CA cert(s) in '%s'\n",
- CAfile);
- } else
- fprintf(stderr, "Info, operating without a CA cert(-list)\n");
- if(!SSL_CTX_set_default_verify_paths(ctx)) {
- fprintf(stderr, "Error setting default verify paths\n");
- goto err;
- }
-
- /* cert and key */
- if((cert || key) && !ctx_set_cert(ctx, cert, key))
- goto err;
- /* dcert and dkey */
- if((dcert || dkey) && !ctx_set_cert(ctx, dcert, dkey))
- goto err;
- /* temporary RSA key generation */
- if(tmp_rsa)
- SSL_CTX_set_tmp_rsa_callback(ctx, cb_generate_tmp_rsa);
-
- /* cipher_list */
- if(cipher_list) {
- if(!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
- fprintf(stderr, "Error setting cipher list '%s'\n",
- cipher_list);
- goto err;
- }
- fprintf(stderr, "Info, set cipher list '%s'\n", cipher_list);
- } else
- fprintf(stderr, "Info, operating with default cipher list\n");
-
- /* dh_file & dh_special */
- if((dh_file || dh_special) && !ctx_set_dh(ctx, dh_file, dh_special))
- goto err;
-
- /* ctx_options */
- SSL_CTX_set_options(ctx, ctx_options);
-
- /* out_state (output of SSL handshake states to screen). */
- if(out_state)
- cb_ssl_info_set_output(stderr);
-
- /* out_verify */
- if(out_verify > 0) {
- cb_ssl_verify_set_output(stderr);
- cb_ssl_verify_set_level(out_verify);
- }
-
- /* verify_depth */
- cb_ssl_verify_set_depth(verify_depth);
-
- /* Success! (includes setting verify_mode) */
- SSL_CTX_set_info_callback(ctx, cb_ssl_info);
- SSL_CTX_set_verify(ctx, verify_mode, cb_ssl_verify);
- ret = ctx;
-err:
- if(!ret) {
- ERR_print_errors_fp(stderr);
- if(ctx)
- SSL_CTX_free(ctx);
- }
- return ret;
-}
-
-/*****************/
-/* Selector bits */
-/*****************/
-
-static void selector_sets_init(select_sets_t *s)
-{
- s->max = 0;
- FD_ZERO(&s->reads);
- FD_ZERO(&s->sends);
- FD_ZERO(&s->excepts);
-}
-static void selector_init(tunala_selector_t *selector)
-{
- selector_sets_init(&selector->last_selected);
- selector_sets_init(&selector->next_select);
-}
-
-#define SEL_EXCEPTS 0x00
-#define SEL_READS 0x01
-#define SEL_SENDS 0x02
-static void selector_add_raw_fd(tunala_selector_t *s, int fd, int flags)
-{
- FD_SET(fd, &s->next_select.excepts);
- if(flags & SEL_READS)
- FD_SET(fd, &s->next_select.reads);
- if(flags & SEL_SENDS)
- FD_SET(fd, &s->next_select.sends);
- /* Adjust "max" */
- if(s->next_select.max < (fd + 1))
- s->next_select.max = fd + 1;
-}
-
-static void selector_add_listener(tunala_selector_t *selector, int fd)
-{
- selector_add_raw_fd(selector, fd, SEL_READS);
-}
-
-static void selector_add_tunala(tunala_selector_t *s, tunala_item_t *t)
-{
- /* Set clean read if sm.clean_in is not full */
- if(t->clean_read != -1) {
- selector_add_raw_fd(s, t->clean_read,
- (buffer_full(state_machine_get_buffer(&t->sm,
- SM_CLEAN_IN)) ? SEL_EXCEPTS : SEL_READS));
- }
- /* Set clean send if sm.clean_out is not empty */
- if(t->clean_send != -1) {
- selector_add_raw_fd(s, t->clean_send,
- (buffer_empty(state_machine_get_buffer(&t->sm,
- SM_CLEAN_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
- }
- /* Set dirty read if sm.dirty_in is not full */
- if(t->dirty_read != -1) {
- selector_add_raw_fd(s, t->dirty_read,
- (buffer_full(state_machine_get_buffer(&t->sm,
- SM_DIRTY_IN)) ? SEL_EXCEPTS : SEL_READS));
- }
- /* Set dirty send if sm.dirty_out is not empty */
- if(t->dirty_send != -1) {
- selector_add_raw_fd(s, t->dirty_send,
- (buffer_empty(state_machine_get_buffer(&t->sm,
- SM_DIRTY_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
- }
-}
-
-static int selector_select(tunala_selector_t *selector)
-{
- memcpy(&selector->last_selected, &selector->next_select,
- sizeof(select_sets_t));
- selector_sets_init(&selector->next_select);
- return select(selector->last_selected.max,
- &selector->last_selected.reads,
- &selector->last_selected.sends,
- &selector->last_selected.excepts, NULL);
-}
-
-/* This returns -1 for error, 0 for no new connections, or 1 for success, in
- * which case *newfd is populated. */
-static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd)
-{
- if(FD_ISSET(fd, &selector->last_selected.excepts))
- return -1;
- if(!FD_ISSET(fd, &selector->last_selected.reads))
- return 0;
- if((*newfd = ip_accept_connection(fd)) == -1)
- return -1;
- return 1;
-}
-
-/************************/
-/* "Tunala" world stuff */
-/************************/
-
-static int tunala_world_make_room(tunala_world_t *world)
-{
- unsigned int newsize;
- tunala_item_t *newarray;
-
- if(world->tunnels_used < world->tunnels_size)
- return 1;
- newsize = (world->tunnels_size == 0 ? 16 :
- ((world->tunnels_size * 3) / 2));
- if((newarray = malloc(newsize * sizeof(tunala_item_t))) == NULL)
- return 0;
- memset(newarray, 0, newsize * sizeof(tunala_item_t));
- if(world->tunnels_used > 0)
- memcpy(newarray, world->tunnels,
- world->tunnels_used * sizeof(tunala_item_t));
- if(world->tunnels_size > 0)
- free(world->tunnels);
- /* migrate */
- world->tunnels = newarray;
- world->tunnels_size = newsize;
- return 1;
-}
-
-static int tunala_world_new_item(tunala_world_t *world, int fd,
- const char *ip, unsigned short port, int flipped)
-{
- tunala_item_t *item;
- int newfd;
- SSL *new_ssl = NULL;
-
- if(!tunala_world_make_room(world))
- return 0;
- if((new_ssl = SSL_new(world->ssl_ctx)) == NULL) {
- fprintf(stderr, "Error creating new SSL\n");
- ERR_print_errors_fp(stderr);
- return 0;
- }
- item = world->tunnels + (world->tunnels_used++);
- state_machine_init(&item->sm);
- item->clean_read = item->clean_send =
- item->dirty_read = item->dirty_send = -1;
- if((newfd = ip_create_connection_split(ip, port)) == -1)
- goto err;
- /* Which way round? If we're a server, "fd" is the dirty side and the
- * connection we open is the clean one. For a client, it's the other way
- * around. Unless, of course, we're "flipped" in which case everything
- * gets reversed. :-) */
- if((world->server_mode && !flipped) ||
- (!world->server_mode && flipped)) {
- item->dirty_read = item->dirty_send = fd;
- item->clean_read = item->clean_send = newfd;
- } else {
- item->clean_read = item->clean_send = fd;
- item->dirty_read = item->dirty_send = newfd;
- }
- /* We use the SSL's "app_data" to indicate a call-back induced "kill" */
- SSL_set_app_data(new_ssl, NULL);
- if(!state_machine_set_SSL(&item->sm, new_ssl, world->server_mode))
- goto err;
- return 1;
-err:
- tunala_world_del_item(world, world->tunnels_used - 1);
- return 0;
-
-}
-
-static void tunala_world_del_item(tunala_world_t *world, unsigned int idx)
-{
- tunala_item_t *item = world->tunnels + idx;
- if(item->clean_read != -1)
- close(item->clean_read);
- if(item->clean_send != item->clean_read)
- close(item->clean_send);
- item->clean_read = item->clean_send = -1;
- if(item->dirty_read != -1)
- close(item->dirty_read);
- if(item->dirty_send != item->dirty_read)
- close(item->dirty_send);
- item->dirty_read = item->dirty_send = -1;
- state_machine_close(&item->sm);
- /* OK, now we fix the item array */
- if(idx + 1 < world->tunnels_used)
- /* We need to scroll entries to the left */
- memmove(world->tunnels + idx,
- world->tunnels + (idx + 1),
- (world->tunnels_used - (idx + 1)) *
- sizeof(tunala_item_t));
- world->tunnels_used--;
-}
-
-static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item)
-{
- int c_r, c_s, d_r, d_s; /* Four boolean flags */
-
- /* Take ourselves out of the gene-pool if there was an except */
- if((item->clean_read != -1) && FD_ISSET(item->clean_read,
- &selector->last_selected.excepts))
- return 0;
- if((item->clean_send != -1) && FD_ISSET(item->clean_send,
- &selector->last_selected.excepts))
- return 0;
- if((item->dirty_read != -1) && FD_ISSET(item->dirty_read,
- &selector->last_selected.excepts))
- return 0;
- if((item->dirty_send != -1) && FD_ISSET(item->dirty_send,
- &selector->last_selected.excepts))
- return 0;
- /* Grab our 4 IO flags */
- c_r = c_s = d_r = d_s = 0;
- if(item->clean_read != -1)
- c_r = FD_ISSET(item->clean_read, &selector->last_selected.reads);
- if(item->clean_send != -1)
- c_s = FD_ISSET(item->clean_send, &selector->last_selected.sends);
- if(item->dirty_read != -1)
- d_r = FD_ISSET(item->dirty_read, &selector->last_selected.reads);
- if(item->dirty_send != -1)
- d_s = FD_ISSET(item->dirty_send, &selector->last_selected.sends);
- /* If no IO has happened for us, skip needless data looping */
- if(!c_r && !c_s && !d_r && !d_s)
- return 1;
- if(c_r)
- c_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
- SM_CLEAN_IN), item->clean_read) <= 0);
- if(c_s)
- c_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
- SM_CLEAN_OUT), item->clean_send) <= 0);
- if(d_r)
- d_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
- SM_DIRTY_IN), item->dirty_read) <= 0);
- if(d_s)
- d_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
- SM_DIRTY_OUT), item->dirty_send) <= 0);
- /* If any of the flags is non-zero, that means they need closing */
- if(c_r) {
- close(item->clean_read);
- if(item->clean_send == item->clean_read)
- item->clean_send = -1;
- item->clean_read = -1;
- }
- if(c_s && (item->clean_send != -1)) {
- close(item->clean_send);
- if(item->clean_send == item->clean_read)
- item->clean_read = -1;
- item->clean_send = -1;
- }
- if(d_r) {
- close(item->dirty_read);
- if(item->dirty_send == item->dirty_read)
- item->dirty_send = -1;
- item->dirty_read = -1;
- }
- if(d_s && (item->dirty_send != -1)) {
- close(item->dirty_send);
- if(item->dirty_send == item->dirty_read)
- item->dirty_read = -1;
- item->dirty_send = -1;
- }
- /* This function name is attributed to the term donated by David
- * Schwartz on openssl-dev, message-ID:
- * <NCBBLIEPOCNJOAEKBEAKEEDGLIAA.davids@webmaster.com>. :-) */
- if(!state_machine_churn(&item->sm))
- /* If the SSL closes, it will also zero-out the _in buffers
- * and will in future process just outgoing data. As and
- * when the outgoing data has gone, it will return zero
- * here to tell us to bail out. */
- return 0;
- /* Otherwise, we return zero if both sides are dead. */
- if(((item->clean_read == -1) || (item->clean_send == -1)) &&
- ((item->dirty_read == -1) || (item->dirty_send == -1)))
- return 0;
- /* If only one side closed, notify the SSL of this so it can take
- * appropriate action. */
- if((item->clean_read == -1) || (item->clean_send == -1)) {
- if(!state_machine_close_clean(&item->sm))
- return 0;
- }
- if((item->dirty_read == -1) || (item->dirty_send == -1)) {
- if(!state_machine_close_dirty(&item->sm))
- return 0;
- }
- return 1;
-}
-
+++ /dev/null
-/* Tunala ("Tunneler with a New Zealand accent")
- *
- * Written by Geoff Thorpe, but endorsed/supported by noone. Please use this is
- * if it's useful or informative to you, but it's only here as a scratchpad for
- * ideas about how you might (or might not) program with OpenSSL. If you deploy
- * this is in a mission-critical environment, and have not read, understood,
- * audited, and modified this code to your satisfaction, and the result is that
- * all hell breaks loose and you are looking for a new employer, then it proves
- * nothing except perhaps that Darwinism is alive and well. Let's just say, *I*
- * don't use this in a mission-critical environment, so it would be stupid for
- * anyone to assume that it is solid and/or tested enough when even its author
- * doesn't place that much trust in it. You have been warned.
- *
- * With thanks to Cryptographic Appliances, Inc.
- */
-
-#ifndef _TUNALA_H
-#define _TUNALA_H
-
-/* pull in autoconf fluff */
-#ifndef NO_CONFIG_H
-#include "config.h"
-#else
-/* We don't have autoconf, we have to set all of these unless a tweaked Makefile
- * tells us not to ... */
-/* headers */
-#ifndef NO_HAVE_SELECT
-#define HAVE_SELECT
-#endif
-#ifndef NO_HAVE_SOCKET
-#define HAVE_SOCKET
-#endif
-#ifndef NO_HAVE_UNISTD_H
-#define HAVE_UNISTD_H
-#endif
-#ifndef NO_HAVE_FCNTL_H
-#define HAVE_FCNTL_H
-#endif
-#ifndef NO_HAVE_LIMITS_H
-#define HAVE_LIMITS_H
-#endif
-/* features */
-#ifndef NO_HAVE_STRSTR
-#define HAVE_STRSTR
-#endif
-#ifndef NO_HAVE_STRTOUL
-#define HAVE_STRTOUL
-#endif
-#endif
-
-#if !defined(HAVE_SELECT) || !defined(HAVE_SOCKET)
-#error "can't build without some network basics like select() and socket()"
-#endif
-
-#include <stdlib.h>
-#ifndef NO_SYSTEM_H
-#include <string.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#endif
-#include <netdb.h>
-#include <signal.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#endif /* !defined(NO_SYSTEM_H) */
-
-#ifndef NO_OPENSSL
-#include <openssl/err.h>
-#include <openssl/engine.h>
-#include <openssl/ssl.h>
-#endif /* !defined(NO_OPENSSL) */
-
-#ifndef OPENSSL_NO_BUFFER
-/* This is the generic "buffer" type that is used when feeding the
- * state-machine. It's basically a FIFO with respect to the "adddata" &
- * "takedata" type functions that operate on it. */
-#define MAX_DATA_SIZE 16384
-typedef struct _buffer_t {
- unsigned char data[MAX_DATA_SIZE];
- unsigned int used;
- /* Statistical values - counts the total number of bytes read in and
- * read out (respectively) since "buffer_init()" */
- unsigned long total_in, total_out;
-} buffer_t;
-
-/* Initialise a buffer structure before use */
-void buffer_init(buffer_t *buf);
-/* Cleanup a buffer structure - presently not needed, but if buffer_t is
- * converted to using dynamic allocation, this would be required - so should be
- * called to protect against an explosion of memory leaks later if the change is
- * made. */
-void buffer_close(buffer_t *buf);
-
-/* Basic functions to manipulate buffers */
-
-unsigned int buffer_used(buffer_t *buf); /* How much data in the buffer */
-unsigned int buffer_unused(buffer_t *buf); /* How much space in the buffer */
-int buffer_full(buffer_t *buf); /* Boolean, is it full? */
-int buffer_notfull(buffer_t *buf); /* Boolean, is it not full? */
-int buffer_empty(buffer_t *buf); /* Boolean, is it empty? */
-int buffer_notempty(buffer_t *buf); /* Boolean, is it not empty? */
-unsigned long buffer_total_in(buffer_t *buf); /* Total bytes written to buffer */
-unsigned long buffer_total_out(buffer_t *buf); /* Total bytes read from buffer */
-
-#if 0 /* Currently used only within buffer.c - better to expose only
- * higher-level functions anyway */
-/* Add data to the tail of the buffer, returns the amount that was actually
- * added (so, you need to check if return value is less than size) */
-unsigned int buffer_adddata(buffer_t *buf, const unsigned char *ptr,
- unsigned int size);
-
-/* Take data from the front of the buffer (and scroll the rest forward). If
- * "ptr" is NULL, this just removes data off the front of the buffer. Return
- * value is the amount actually removed (can be less than size if the buffer has
- * too little data). */
-unsigned int buffer_takedata(buffer_t *buf, unsigned char *ptr,
- unsigned int size);
-
-/* Flushes as much data as possible out of the "from" buffer into the "to"
- * buffer. Return value is the amount moved. The amount moved can be restricted
- * to a maximum by specifying "cap" - setting it to -1 means no limit. */
-unsigned int buffer_tobuffer(buffer_t *to, buffer_t *from, int cap);
-#endif
-
-#ifndef NO_IP
-/* Read or write between a file-descriptor and a buffer */
-int buffer_from_fd(buffer_t *buf, int fd);
-int buffer_to_fd(buffer_t *buf, int fd);
-#endif /* !defined(NO_IP) */
-
-#ifndef NO_OPENSSL
-/* Read or write between an SSL or BIO and a buffer */
-void buffer_from_SSL(buffer_t *buf, SSL *ssl);
-void buffer_to_SSL(buffer_t *buf, SSL *ssl);
-void buffer_from_BIO(buffer_t *buf, BIO *bio);
-void buffer_to_BIO(buffer_t *buf, BIO *bio);
-
-/* Callbacks */
-void cb_ssl_info(const SSL *s, int where, int ret);
-void cb_ssl_info_set_output(FILE *fp); /* Called if output should be sent too */
-int cb_ssl_verify(int ok, X509_STORE_CTX *ctx);
-void cb_ssl_verify_set_output(FILE *fp);
-void cb_ssl_verify_set_depth(unsigned int verify_depth);
-void cb_ssl_verify_set_level(unsigned int level);
-RSA *cb_generate_tmp_rsa(SSL *s, int is_export, int keylength);
-#endif /* !defined(NO_OPENSSL) */
-#endif /* !defined(OPENSSL_NO_BUFFER) */
-
-#ifndef NO_TUNALA
-#ifdef OPENSSL_NO_BUFFER
-#error "TUNALA section of tunala.h requires BUFFER support"
-#endif
-typedef struct _state_machine_t {
- SSL *ssl;
- BIO *bio_intossl;
- BIO *bio_fromssl;
- buffer_t clean_in, clean_out;
- buffer_t dirty_in, dirty_out;
-} state_machine_t;
-typedef enum {
- SM_CLEAN_IN, SM_CLEAN_OUT,
- SM_DIRTY_IN, SM_DIRTY_OUT
-} sm_buffer_t;
-void state_machine_init(state_machine_t *machine);
-void state_machine_close(state_machine_t *machine);
-buffer_t *state_machine_get_buffer(state_machine_t *machine, sm_buffer_t type);
-SSL *state_machine_get_SSL(state_machine_t *machine);
-int state_machine_set_SSL(state_machine_t *machine, SSL *ssl, int is_server);
-/* Performs the data-IO loop and returns zero if the machine should close */
-int state_machine_churn(state_machine_t *machine);
-/* Is used to handle closing conditions - namely when one side of the tunnel has
- * closed but the other should finish flushing. */
-int state_machine_close_clean(state_machine_t *machine);
-int state_machine_close_dirty(state_machine_t *machine);
-#endif /* !defined(NO_TUNALA) */
-
-#ifndef NO_IP
-/* Initialise anything related to the networking. This includes blocking pesky
- * SIGPIPE signals. */
-int ip_initialise(void);
-/* ip is the 4-byte ip address (eg. 127.0.0.1 is {0x7F,0x00,0x00,0x01}), port is
- * the port to listen on (host byte order), and the return value is the
- * file-descriptor or -1 on error. */
-int ip_create_listener_split(const char *ip, unsigned short port);
-/* Same semantics as above. */
-int ip_create_connection_split(const char *ip, unsigned short port);
-/* Converts a string into the ip/port before calling the above */
-int ip_create_listener(const char *address);
-int ip_create_connection(const char *address);
-/* Just does a string conversion on its own. NB: If accept_all_ip is non-zero,
- * then the address string could be just a port. Ie. it's suitable for a
- * listening address but not a connecting address. */
-int ip_parse_address(const char *address, const char **parsed_ip,
- unsigned short *port, int accept_all_ip);
-/* Accepts an incoming connection through the listener. Assumes selects and
- * what-not have deemed it an appropriate thing to do. */
-int ip_accept_connection(int listen_fd);
-#endif /* !defined(NO_IP) */
-
-/* These functions wrap up things that can be portability hassles. */
-int int_strtoul(const char *str, unsigned long *val);
-#ifdef HAVE_STRSTR
-#define int_strstr strstr
-#else
-char *int_strstr(const char *haystack, const char *needle);
-#endif
-
-#endif /* !defined(_TUNALA_H) */
projects / openssl.git / commitdiff