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Commit 241c9ea1 authored by Niels Möller's avatar Niels Möller
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Rewrote to use io_read_file_raw and 

write_raw, without using any commands or io_run.

Rev: src/lsh-writekey.c:1.19
parent 2c5eea1c
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src/lsh-writekey.c
View file @ 241c9ea1
......@@ -30,8 +30,8 @@
#include "io_commands.h"
#include "interact.h"
#include "rsa.h"
#include "sexp_commands.h"
#include "spki_commands.h"
#include "sexp.h"
#include "spki.h"
#include "version.h"
#include "werror.h"
#include "xalloc.h"
......@@ -48,37 +48,8 @@
#include <unistd.h>
#endif
#define BLOCK_SIZE 2000
#define MAX_SEXP_SIZE 5000
static struct read_sexp_command read_sexp
= STATIC_READ_SEXP(SEXP_TRANSPORT, 0, MAX_SEXP_SIZE);
#define READ_SEXP (&read_sexp.super.super)
struct lsh_writekey_options;
extern struct command lsh_writekey_print_public;
#define PRINT_PUBLIC (&lsh_writekey_print_public.super)
extern struct command lsh_writekey_print_private;
#define PRINT_PRIVATE (&lsh_writekey_print_private.super)
extern struct command lsh_writekey_options2algorithms;
#define OPTIONS2ALGORITHMS (&lsh_writekey_options2algorithms.super)
extern struct command lsh_writekey_options2transform;
#define TRANSFORM (&lsh_writekey_options2transform.super)
extern struct command lsh_writekey_options2public_file;
#define OPTIONS2PUBLIC_FILE (&lsh_writekey_options2public_file.super)
extern struct command lsh_writekey_options2private_file;
#define OPTIONS2PRIVATE_FILE (&lsh_writekey_options2private_file.super)
#include "lsh-writekey.c.x"
/* Option parsing */
const char *argp_program_version
......@@ -310,182 +281,160 @@ main_argp =
NULL, NULL
};
DEFINE_COMMAND(lsh_writekey_print_public)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
static int
open_private_file(const struct lsh_string *file)
{
CAST(lsh_writekey_options, options, a);
COMMAND_RETURN(c,
make_sexp_print_command
((options->style > 0)
? options->style : SEXP_TRANSPORT));
int fd = open(lsh_get_cstring(file),
O_CREAT | O_EXCL | O_WRONLY,
0600);
if (fd < 0)
werror("Failed to open `%z'for writing: %z\n"
"lsh-writekey doesn't overwrite existing key files.\n"
"If you *really* want to do that, you should delete\n"
"the existing files first\n",
file, STRERROR(errno));
return fd;
}
DEFINE_COMMAND(lsh_writekey_print_private)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
static int
open_public_file(const struct lsh_string *file)
{
CAST(lsh_writekey_options, options, a);
COMMAND_RETURN(c,
make_sexp_print_command
((options->style > 0)
? options->style : SEXP_CANONICAL));
struct lsh_string *s = ssh_format("%lS.pub", file);
int fd = open(lsh_get_cstring(s),
O_CREAT | O_EXCL | O_WRONLY,
0644);
if (fd < 0)
werror("Failed to open `%z'for writing: %z\n"
"lsh-writekey doesn't overwrite existing key files.\n"
"If you *really* want to do that, you should delete\n"
"the existing files first\n",
file, STRERROR(errno));
lsh_string_free(s);
return fd;
}
DEFINE_COMMAND(lsh_writekey_options2algorithms)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
static struct lsh_string *
process_private(struct sexp *key,
struct lsh_writekey_options *options)
{
CAST(lsh_writekey_options, options, a);
COMMAND_RETURN(c, options->signature_algorithms);
}
struct sexp *expr = key;
DEFINE_COMMAND(lsh_writekey_options2transform)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
{
CAST(lsh_writekey_options, options, a);
if (!options->crypto)
COMMAND_RETURN(c, &command_I);
else
if (options->crypto)
{
CAST_SUBTYPE(mac_algorithm, hmac,
ALIST_GET(options->crypto_algorithms, ATOM_HMAC_SHA1));
ALIST_GET(options->crypto_algorithms, ATOM_HMAC_SHA1));
assert(hmac);
COMMAND_RETURN(c,
make_pkcs5_encrypt(options->r,
lsh_string_dup(options->label),
ATOM_HMAC_SHA1,
hmac,
options->crypto_name,
options->crypto,
10, /* Salt length */
lsh_string_dup(options->passphrase),
options->iterations));
expr = spki_pkcs5_encrypt(options->r,
options->label,
ATOM_HMAC_SHA1,
hmac,
options->crypto_name,
options->crypto,
10, /* Salt length */
options->passphrase,
options->iterations,
sexp_format(SEXP_CANONICAL, key, 0));
}
return sexp_format(expr,
(options->style > 0) ? options->style : SEXP_CANONICAL,
0);
}
DEFINE_COMMAND(lsh_writekey_options2public_file)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
static struct lsh_string *
process_public(struct sexp *key,
struct lsh_writekey_options *options)
{
CAST(lsh_writekey_options, options, a);
struct lsh_string *public = ssh_format("%lS.pub", options->file);
COMMAND_RETURN(c,
make_io_write_file_info(public,
O_CREAT | O_EXCL | O_WRONLY,
0644,
BLOCK_SIZE));
}
struct signer *s;
struct verifier *v;
s = spki_sexp_to_signer(options->signature_algorithms,
key);
if (!s)
return NULL;
DEFINE_COMMAND(lsh_writekey_options2private_file)
(struct command *s UNUSED,
struct lsh_object *a,
struct command_continuation *c,
struct exception_handler *e UNUSED)
{
CAST(lsh_writekey_options, options, a);
v = SIGNER_GET_VERIFIER(s);
assert(v);
COMMAND_RETURN(c,
make_io_write_file_info(lsh_string_dup(options->file),
O_CREAT | O_EXCL | O_WRONLY,
0600,
BLOCK_SIZE));
return sexp_format(spki_make_public_key(v),
(options->style > 0) ? options->style : SEXP_TRANSPORT,
0);
}
/* GABA:
(expr
(name make_writekey)
(params
(stdin object lsh_fd))
(expr
(lambda (options)
(let ((key (read_sexp
; Delay reading a little
(prog1 stdin options))))
(prog1 (print_public options
(io_write_file (options2public_file options))
(verifier2public
(signer2verifier
(sexp2signer (options2algorithms options)
key))))
(print_private options
(io_write_file (options2private_file options))
(transform options key)))))))
*/
static void
do_lsh_writekey_handler(struct exception_handler *s UNUSED,
const struct exception *e)
int
main(int argc, char **argv)
{
/* NOTE: This is quite a complicated way to just write a friendlier
* message if we fail because the output files already exists. This
* way, it is easier to handle other kinds of errors later, as the
* need arises. */
struct lsh_writekey_options *options = make_lsh_writekey_options();
int private_fd;
int public_fd;
struct lsh_string *input;
struct lsh_string *output;
struct sexp *key;
const struct exception *e;
switch (e->type)
argp_parse(&main_argp, argc, argv, 0, NULL, options);
private_fd = open_private_file(options->file);
if (private_fd < 0)
return EXIT_FAILURE;
public_fd = open_public_file(options->file);
if (public_fd < 0)
return EXIT_FAILURE;
input = io_read_file_raw(STDIN_FILENO, 2000);
if (!input)
{
case EXC_IO_OPEN_WRITE:
{
CAST_SUBTYPE(io_exception, x, e);
switch(x->error)
{
case EEXIST:
werror("\nlsh-writekey doesn't overwrite existing key files.\n"
"If you *really* want to do that, you should delete\n"
"the existing files \"FOO\" and \"FOO.pub\" first\n"
"(where \"FOO\" usually is \"~/.lsh/identity\").\n");
break;
default:
goto outer_default;
}
break;
}
outer_default:
default:
werror("lsh-writekey: %z\n", e->msg);
werror("Failed to read key from stdin: %z\n",
STRERROR(errno));
return EXIT_FAILURE;
}
exit(EXIT_FAILURE);
}
static struct exception_handler exc_handler =
STATIC_EXCEPTION_HANDLER(do_lsh_writekey_handler, NULL);
key = string_to_sexp(SEXP_TRANSPORT, input, 1);
if (!key)
{
werror("S-expression syntax error.\n");
return EXIT_FAILURE;
}
int main(int argc, char **argv)
{
struct lsh_writekey_options *options = make_lsh_writekey_options();
output = process_private(key, options);
if (!output)
return EXIT_FAILURE;
io_init();
argp_parse(&main_argp, argc, argv, 0, NULL, options);
e = write_raw(private_fd, output->length, output->data);
lsh_string_free(output);
{
CAST_SUBTYPE
(command, work,
make_writekey(make_lsh_fd(STDIN_FILENO, "stdin", &exc_handler)));
COMMAND_CALL(work, options,
&discard_continuation, &exc_handler);
}
io_run();
if (e)
{
werror("Writing private key failed: %z\n",
e->msg);
return EXIT_FAILURE;
}
output = process_public(key, options);
if (!output)
return EXIT_FAILURE;
io_final();
e = write_raw(public_fd, output->length, output->data);
lsh_string_free(output);
if (e)
{
werror("Writing public key failed: %z\n",
e->msg);
return EXIT_FAILURE;
}
gc_final();
return EXIT_SUCCESS;
}
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