qmail-dksign.c File Reference

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "sig.h"
#include "stralloc.h"
#include "buffer.h"
#include "error.h"
#include "auto_qmail.h"
#include "control.h"
#include "str.h"
#include "exit.h"
#include "case.h"
#include "constmap.h"
#include "uint_t.h"
#include "fd.h"
#include "logmsg.h"
#include "open.h"
#include "fmt.h"
#include "fmtqfn.h"
#include "readwrite.h"
#include "qmail.h"
#include "wait.h"
#include "pathexec.h"
#include "rcpthosts.h"

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Macros
#define	WHO   "qmail-dksign"
#define	DOMAINKEYS   "ssl/domainkeys/"

Functions
void	die (int e)
void	die_write (char *fn)
void	die_read ()
void	out (char *s)
void	zero ()
void	zerodie ()
void	temp_nomem ()
void	temp_chdir ()
void	temp_create ()
void	temp_unlink ()
void	temp_control ()
void	perm_usage ()
void	temp_read ()
void	temp_nosignkey ()
int	get_controls ()
void	fnmake_dkim (unsigned long id)
void	dkim_unlink ()
void	dkim_stage ()
int	dkim_sign (const char *rsakeyfile, const char *ecckeyfile, const char *fnin, const char *fnout)
int	qmail_remote (char **qargs, int fd)
void	dkim_setup ()
int	main (int argc, char **args)

Variables
char	bufin [1000]
buffer	bi = BUFFER_INIT(read,0,bufin,sizeof(bufin))
char	bufout [1000]
buffer	bo = BUFFER_INIT(write,1,bufout,sizeof(bufout))
stralloc	fndkin = {0}
stralloc	fndkout = {0}
stralloc	sender = {0}
stralloc	senddomain = {0}
stralloc	originator = {0}
stralloc	dkimdomains = {0}
struct constmap	mapdkimdomains
stralloc	ecckey = {0}
stralloc	rsakey = {0}
char *	dkimparams = 0
stralloc	selector = {0}
stralloc	selectore = {0}
stralloc	sdid = {0}
stralloc	auid = {0}
stralloc	expire = {0}
stralloc	canon = {0}
stralloc	hash = {0}
stralloc	length = {0}

Detailed Description

-- generate signature and attach in DKIM header to outgoing message

Steps:

a) DKIM controls: get private key for sending domain b) Prepare two staging files at queue/dkim (before and after signing) c) Read input at fd0 and insert CR for every line and store at dkim/x/pre d) DKIM sign the message with provided private key and store at dkim/y/post e) Copy signed file from fd to 0 f) Invoke qmail-remote (respecting the \r
) g) Remove staging files (pre/post)

Hack for hybrid signatures:

a) selector is a link to RSA private key b) selector2 is a link to Ed25519 private key c) Both are provided in the 'selector' field of dkimdomains separated by colon d) The coupled selector information is provided to qmail-dkim as: -yselector ,-Yselector2 e) The RSA privat key is given unaltered f) The Ed25519 private is supplied as additional argument

Definition in file qmail-dksign.c.

Macro Definition Documentation

DOMAINKEYS

#define DOMAINKEYS   "ssl/domainkeys/"

Definition at line 31 of file qmail-dksign.c.

WHO

#define WHO   "qmail-dksign"

Definition at line 29 of file qmail-dksign.c.

Function Documentation

die()

void die

(

int

e

)

Definition at line 61 of file qmail-dksign.c.

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die_read()

void die_read

(

void

)

Definition at line 63 of file qmail-dksign.c.

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die_write()

void die_write

(

char *

fn

)

Definition at line 62 of file qmail-dksign.c.

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dkim_setup()

void dkim_setup

(

)

Definition at line 334 of file qmail-dksign.c.

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dkim_sign()

int dkim_sign	(	const char *	rsakeyfile,
		const char *	ecckeyfile,
		const char *	fnin,
		const char *	fnout
	)

qmail-dkim [-h|-v|-s] [tags] [ ]

tags:

-c<canonicalization> - r=relaxed [DEFAULT], s=simple, t=relaxed/simple, u=simple/relaxed -d<sdid> - Signing Domain Identifier,if not provided it will be determined from the envelope originator/from header -i<auid> - Agent User Identifier, usually the sender's email address (optional) -l - include body length tag (optional) -q - include query method tag -t - include a timestamp tag (optional) -x<expire_time> - the expire time in seconds since epoch (optional, DEFAULT = current time + 604800) -y<selector> - set RSA selector (DEFAULT: default) -Y<selector> - set Ed25519 selector (DEFAULT: default) -z<hash> - set signature type (1=sha1, 2=sha256, 3=both, 4=ed25519, 5=hybrid)

Definition at line 264 of file qmail-dksign.c.

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dkim_stage()

void dkim_stage

(

)

Definition at line 197 of file qmail-dksign.c.

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dkim_unlink()

void dkim_unlink

(

)

Definition at line 189 of file qmail-dksign.c.

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fnmake_dkim()

void fnmake_dkim

(

unsigned long

id

)

Definition at line 182 of file qmail-dksign.c.

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get_controls()

int get_controls

(

)

Definition at line 128 of file qmail-dksign.c.

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main()

int main	(	int	argc,
		char **	args
	)

Definition at line 435 of file qmail-dksign.c.

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out()

void out

(

char *

s

)

Definition at line 64 of file qmail-dksign.c.

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perm_usage()

void perm_usage

(

)

Definition at line 108 of file qmail-dksign.c.

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qmail_remote()

int qmail_remote	(	char **	qargs,
		int	fd
	)

Definition at line 303 of file qmail-dksign.c.

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temp_chdir()

void temp_chdir

(

)

Definition at line 86 of file qmail-dksign.c.

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temp_control()

void temp_control

(

)

Definition at line 103 of file qmail-dksign.c.

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temp_create()

void temp_create

(

)

Definition at line 91 of file qmail-dksign.c.

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temp_nomem()

void temp_nomem

(

void

)

Definition at line 81 of file qmail-dksign.c.

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temp_nosignkey()

void temp_nosignkey

(

)

Definition at line 118 of file qmail-dksign.c.

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temp_read()

void temp_read

(

)

Definition at line 113 of file qmail-dksign.c.

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temp_unlink()

void temp_unlink

(

)

Definition at line 98 of file qmail-dksign.c.

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zero()

void zero

(

)

Definition at line 65 of file qmail-dksign.c.

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zerodie()

void zerodie

(

void

)

Definition at line 66 of file qmail-dksign.c.

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Variable Documentation

auid

stralloc auid = {0}

Definition at line 240 of file qmail-dksign.c.

bi

buffer bi = BUFFER_INIT(read,0,bufin,sizeof(bufin))

Definition at line 57 of file qmail-dksign.c.

bo

buffer bo = BUFFER_INIT(write,1,bufout,sizeof(bufout))

Definition at line 59 of file qmail-dksign.c.

bufin

char bufin[1000]

Definition at line 56 of file qmail-dksign.c.

bufout

char bufout[1000]

Definition at line 58 of file qmail-dksign.c.

canon

stralloc canon = {0}

Definition at line 242 of file qmail-dksign.c.

dkimdomains

stralloc dkimdomains = {0}

Definition at line 74 of file qmail-dksign.c.

dkimparams

char* dkimparams = 0

Definition at line 79 of file qmail-dksign.c.

ecckey

stralloc ecckey = {0}

Definition at line 77 of file qmail-dksign.c.

expire

stralloc expire = {0}

Definition at line 241 of file qmail-dksign.c.

fndkin

stralloc fndkin = {0}

Definition at line 68 of file qmail-dksign.c.

fndkout

stralloc fndkout = {0}

Definition at line 69 of file qmail-dksign.c.

hash

stralloc hash = {0}

Definition at line 243 of file qmail-dksign.c.

length

stralloc length = {0}

Definition at line 244 of file qmail-dksign.c.

mapdkimdomains

struct constmap mapdkimdomains

Definition at line 75 of file qmail-dksign.c.

originator

stralloc originator = {0}

Definition at line 73 of file qmail-dksign.c.

rsakey

stralloc rsakey = {0}

Definition at line 78 of file qmail-dksign.c.

sdid

stralloc sdid = {0}

Definition at line 239 of file qmail-dksign.c.

selector

stralloc selector = {0}

Definition at line 237 of file qmail-dksign.c.

selectore

stralloc selectore = {0}

Definition at line 238 of file qmail-dksign.c.

senddomain

stralloc senddomain = {0}

Definition at line 72 of file qmail-dksign.c.

sender

stralloc sender = {0}

Definition at line 71 of file qmail-dksign.c.