int
cms_context_init(cms_context *ctx)
{
SECStatus status;
status = NSS_InitReadWrite("/etc/pki/pesign");
if (status != SECSuccess)
return -1;
status = register_oids();
if (status != SECSuccess)
return -1;
memset(ctx, '\0', sizeof (*ctx));
ctx->arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!ctx->arena) {
fprintf(stderr, "Could not create cryptographic arena: %s\n",
PORT_ErrorToString(PORT_GetError()));
return -1;
}
return 0;
}
int
main(int argc, char *argv[])
{
int rc;
pesign_context *ctxp;
int list = 0;
int remove = 0;
int daemon = 0;
int fork = 1;
int padding = 0;
int need_db = 0;
char *digest_name = "sha256";
char *tokenname = "NSS Certificate DB";
char *origtoken = tokenname;
char *certname = NULL;
char *certdir = "/etc/pki/pesign";
char *signum = NULL;
rc = pesign_context_new(&ctxp);
if (rc < 0) {
fprintf(stderr, "Could not initialize context: %m\n");
exit(1);
}
poptContext optCon;
struct poptOption options[] = {
{NULL, '\0', POPT_ARG_INTL_DOMAIN, "pesign" },
{"in", 'i', POPT_ARG_STRING, &ctxp->infile, 0,
"specify input file", "<infile>"},
{"out", 'o', POPT_ARG_STRING, &ctxp->outfile, 0,
"specify output file", "<outfile>" },
{"certficate", 'c', POPT_ARG_STRING, &certname, 0,
"specify certificate nickname",
"<certificate nickname>" },
{"certdir", 'n', POPT_ARG_STRING|POPT_ARGFLAG_SHOW_DEFAULT,
&certdir, 0,
"specify nss certificate database directory",
"<certificate directory path>" },
{"force", 'f', POPT_ARG_VAL, &ctxp->force, 1,
"force overwriting of output file", NULL },
{"sign", 's', POPT_ARG_VAL, &ctxp->sign, 1,
"create a new signature", NULL },
{"hash", 'h', POPT_ARG_VAL, &ctxp->hash, 1,
"hash binary", NULL },
{"digest_type", 'd', POPT_ARG_STRING|POPT_ARGFLAG_SHOW_DEFAULT,
&digest_name, 0, "digest type to use for pe hash" },
{"import-signed-certificate", 'm',
POPT_ARG_STRING|POPT_ARGFLAG_DOC_HIDDEN,
&ctxp->insig, 0,"import signature from file", "<insig>" },
{"export-signed-attributes", 'E',
POPT_ARG_STRING|POPT_ARGFLAG_DOC_HIDDEN,
&ctxp->outsattrs, 0, "export signed attributes to file",
"<signed_attributes_file>" },
{"import-signed-attributes", 'I',
POPT_ARG_STRING|POPT_ARGFLAG_DOC_HIDDEN,
&ctxp->insattrs, 0,
"import signed attributes from file",
"<signed_attributes_file>" },
{"import-raw-signature", 'R',
POPT_ARG_STRING|POPT_ARGFLAG_DOC_HIDDEN, &ctxp->rawsig,
0, "import raw signature from file", "<inraw>" },
{"signature-number", 'u', POPT_ARG_STRING, &signum, 0,
"specify which signature to operate on","<sig-number>"},
{"list-signatures", 'l',
POPT_ARG_VAL|POPT_ARGFLAG_DOC_HIDDEN,
&list, 1, "list signatures", NULL },
{"nss-token", 't', POPT_ARG_STRING|POPT_ARGFLAG_SHOW_DEFAULT,
&tokenname, 0, "NSS token holding signing key" },
{"show-signature", 'S', POPT_ARG_VAL, &list, 1,
"show signature", NULL },
{"remove-signature", 'r', POPT_ARG_VAL, &remove, 1,
"remove signature" },
{"export-signature", 'e',
POPT_ARG_STRING|POPT_ARGFLAG_DOC_HIDDEN,
&ctxp->outsig, 0,
"export signature to file", "<outsig>" },
{"export-pubkey", 'K', POPT_ARG_STRING,
&ctxp->outkey, 0, "export pubkey to file", "<outkey>" },
{"export-cert", 'C', POPT_ARG_STRING,
&ctxp->outcert, 0, "export signing cert to file",
"<outcert>" },
{"ascii-armor", 'a', POPT_ARG_VAL, &ctxp->ascii, 1,
"use ascii armoring", NULL },
{"daemonize", 'D', POPT_ARG_VAL, &daemon, 1,
"run as a daemon process", NULL },
{"nofork", 'N', POPT_ARG_VAL, &fork, 0,
"don't fork when daemonizing", NULL },
{"verbose", 'v', POPT_ARG_VAL, &ctxp->verbose, 1,
"be very verbose", NULL },
{"padding", 'P', POPT_ARG_VAL,
&padding, 1, "pad data section", NULL },
POPT_AUTOALIAS
POPT_AUTOHELP
POPT_TABLEEND
};
optCon = poptGetContext("pesign", argc, (const char **)argv, options,0);
rc = poptReadDefaultConfig(optCon, 0);
if (rc < 0 && !(rc == POPT_ERROR_ERRNO && errno == ENOENT)) {
fprintf(stderr, "pesign: poptReadDefaultConfig failed: %s\n",
poptStrerror(rc));
exit(1);
}
while ((rc = poptGetNextOpt(optCon)) > 0)
;
if (rc < -1) {
fprintf(stderr, "pesign: Invalid argument: %s: %s\n",
poptBadOption(optCon, 0), poptStrerror(rc));
exit(1);
}
if (poptPeekArg(optCon)) {
fprintf(stderr, "pesign: Invalid Argument: \"%s\"\n",
poptPeekArg(optCon));
exit(1);
}
poptFreeContext(optCon);
if (signum) {
errno = 0;
ctxp->signum = strtol(signum, NULL, 0);
if (errno != 0) {
fprintf(stderr, "invalid signature number: %m\n");
exit(1);
}
}
int action = 0;
if (daemon)
action |= DAEMONIZE;
if (ctxp->rawsig) {
action |= IMPORT_RAW_SIGNATURE;
need_db = 1;
}
if (ctxp->insattrs)
action |= IMPORT_SATTRS;
if (ctxp->outsattrs)
action |= EXPORT_SATTRS;
if (ctxp->insig)
action |= IMPORT_SIGNATURE;
if (ctxp->outkey) {
action |= EXPORT_PUBKEY;
need_db = 1;
}
if (ctxp->outcert) {
action |= EXPORT_CERT;
need_db = 1;
}
if (ctxp->outsig)
action |= EXPORT_SIGNATURE;
if (remove != 0)
action |= REMOVE_SIGNATURE;
if (list != 0)
action |= LIST_SIGNATURES;
if (ctxp->sign) {
action |= GENERATE_SIGNATURE;
if (!(action & EXPORT_SIGNATURE))
action |= IMPORT_SIGNATURE;
need_db = 1;
}
if (ctxp->hash)
action |= GENERATE_DIGEST|PRINT_DIGEST;
if (!daemon) {
SECStatus status;
if (need_db)
status = NSS_Init(certdir);
else
status = NSS_NoDB_Init(NULL);
if (status != SECSuccess) {
fprintf(stderr, "Could not initialize nss: %s\n",
PORT_ErrorToString(PORT_GetError()));
exit(1);
}
status = register_oids(ctxp->cms_ctx);
if (status != SECSuccess) {
fprintf(stderr, "Could not register OIDs\n");
exit(1);
}
}
rc = set_digest_parameters(ctxp->cms_ctx, digest_name);
int is_help = strcmp(digest_name, "help") ? 0 : 1;
if (rc < 0) {
if (!is_help) {
fprintf(stderr, "Digest \"%s\" not found.\n",
digest_name);
}
exit(!is_help);
}
ctxp->cms_ctx->tokenname = tokenname ?
PORT_ArenaStrdup(ctxp->cms_ctx->arena, tokenname) : NULL;
if (tokenname && !ctxp->cms_ctx->tokenname) {
fprintf(stderr, "could not allocate token name: %s\n",
PORT_ErrorToString(PORT_GetError()));
exit(1);
}
if (tokenname != origtoken)
free(tokenname);
ctxp->cms_ctx->certname = certname ?
PORT_ArenaStrdup(ctxp->cms_ctx->arena, certname) : NULL;
if (certname && !ctxp->cms_ctx->certname) {
fprintf(stderr, "could not allocate certificate name: %s\n",
PORT_ErrorToString(PORT_GetError()));
exit(1);
}
if (certname)
free(certname);
if (ctxp->sign) {
if (!ctxp->cms_ctx->certname) {
fprintf(stderr, "pesign: signing requested but no "
"certificate nickname provided\n");
exit(1);
}
}
ssize_t sigspace = 0;
switch (action) {
case NO_FLAGS:
fprintf(stderr, "pesign: Nothing to do.\n");
exit(0);
break;
/* in this case we have the actual binary signature and the
* signing cert, but not the pkcs7ish certificate that goes
* with it.
*/
case IMPORT_RAW_SIGNATURE|IMPORT_SATTRS:
check_inputs(ctxp);
rc = find_certificate(ctxp->cms_ctx, 0);
if (rc < 0) {
fprintf(stderr, "pesign: Could not find "
"certificate %s\n",
ctxp->cms_ctx->certname);
exit(1);
}
open_rawsig_input(ctxp);
open_sattr_input(ctxp);
import_raw_signature(ctxp);
close_sattr_input(ctxp);
close_rawsig_input(ctxp);
open_input(ctxp);
open_output(ctxp);
close_input(ctxp);
generate_digest(ctxp->cms_ctx, ctxp->outpe, 1);
sigspace = calculate_signature_space(ctxp->cms_ctx,
ctxp->outpe);
allocate_signature_space(ctxp->outpe, sigspace);
generate_signature(ctxp->cms_ctx);
insert_signature(ctxp->cms_ctx, ctxp->signum);
close_output(ctxp);
break;
case EXPORT_SATTRS:
open_input(ctxp);
open_sattr_output(ctxp);
generate_digest(ctxp->cms_ctx, ctxp->inpe, 1);
generate_sattr_blob(ctxp);
close_sattr_output(ctxp);
close_input(ctxp);
break;
/* add a signature from a file */
case IMPORT_SIGNATURE:
check_inputs(ctxp);
if (ctxp->signum > ctxp->cms_ctx->num_signatures + 1) {
fprintf(stderr, "Invalid signature number.\n");
exit(1);
}
open_input(ctxp);
open_output(ctxp);
close_input(ctxp);
open_sig_input(ctxp);
parse_signature(ctxp);
sigspace = get_sigspace_extend_amount(ctxp->cms_ctx,
ctxp->outpe, &ctxp->cms_ctx->newsig);
allocate_signature_space(ctxp->outpe, sigspace);
check_signature_space(ctxp);
insert_signature(ctxp->cms_ctx, ctxp->signum);
close_sig_input(ctxp);
close_output(ctxp);
break;
case EXPORT_PUBKEY:
rc = find_certificate(ctxp->cms_ctx, 1);
if (rc < 0) {
fprintf(stderr, "pesign: Could not find "
"certificate %s\n",
ctxp->cms_ctx->certname);
exit(1);
}
open_pubkey_output(ctxp);
export_pubkey(ctxp);
break;
case EXPORT_CERT:
rc = find_certificate(ctxp->cms_ctx, 0);
if (rc < 0) {
fprintf(stderr, "pesign: Could not find "
"certificate %s\n",
ctxp->cms_ctx->certname);
exit(1);
}
open_cert_output(ctxp);
export_cert(ctxp);
break;
/* find a signature in the binary and save it to a file */
case EXPORT_SIGNATURE:
open_input(ctxp);
open_sig_output(ctxp);
if (ctxp->signum > ctxp->cms_ctx->num_signatures) {
fprintf(stderr, "Invalid signature number.\n");
exit(1);
}
if (ctxp->signum < 0)
ctxp->signum = 0;
if (ctxp->signum >= ctxp->cms_ctx->num_signatures) {
fprintf(stderr, "No valid signature #%d.\n",
ctxp->signum);
exit(1);
}
memcpy(&ctxp->cms_ctx->newsig,
ctxp->cms_ctx->signatures[ctxp->signum],
sizeof (ctxp->cms_ctx->newsig));
export_signature(ctxp->cms_ctx, ctxp->outsigfd, ctxp->ascii);
close_input(ctxp);
close_sig_output(ctxp);
memset(&ctxp->cms_ctx->newsig, '\0',
sizeof (ctxp->cms_ctx->newsig));
break;
/* remove a signature from the binary */
case REMOVE_SIGNATURE:
check_inputs(ctxp);
open_input(ctxp);
open_output(ctxp);
close_input(ctxp);
if (ctxp->signum < 0 ||
ctxp->signum >=
ctxp->cms_ctx->num_signatures) {
fprintf(stderr, "Invalid signature number %d. "
"Must be between 0 and %d.\n",
ctxp->signum,
ctxp->cms_ctx->num_signatures - 1);
exit(1);
}
remove_signature(ctxp);
close_output(ctxp);
break;
/* list signatures in the binary */
case LIST_SIGNATURES:
open_input(ctxp);
list_signatures(ctxp);
break;
case GENERATE_DIGEST|PRINT_DIGEST:
open_input(ctxp);
generate_digest(ctxp->cms_ctx, ctxp->inpe, padding);
print_digest(ctxp);
break;
/* generate a signature and save it in a separate file */
case EXPORT_SIGNATURE|GENERATE_SIGNATURE:
rc = find_certificate(ctxp->cms_ctx, 1);
if (rc < 0) {
fprintf(stderr, "pesign: Could not find "
"certificate %s\n",
ctxp->cms_ctx->certname);
exit(1);
}
open_input(ctxp);
open_sig_output(ctxp);
generate_digest(ctxp->cms_ctx, ctxp->inpe, 1);
generate_signature(ctxp->cms_ctx);
export_signature(ctxp->cms_ctx, ctxp->outsigfd, ctxp->ascii);
break;
/* generate a signature and embed it in the binary */
case IMPORT_SIGNATURE|GENERATE_SIGNATURE:
check_inputs(ctxp);
rc = find_certificate(ctxp->cms_ctx, 1);
if (rc < 0) {
fprintf(stderr, "pesign: Could not find "
"certificate %s\n",
ctxp->cms_ctx->certname);
exit(1);
}
if (ctxp->signum > ctxp->cms_ctx->num_signatures + 1) {
fprintf(stderr, "Invalid signature number.\n");
exit(1);
}
open_input(ctxp);
open_output(ctxp);
close_input(ctxp);
generate_digest(ctxp->cms_ctx, ctxp->outpe, 1);
sigspace = calculate_signature_space(ctxp->cms_ctx,
ctxp->outpe);
allocate_signature_space(ctxp->outpe, sigspace);
generate_digest(ctxp->cms_ctx, ctxp->outpe, 1);
generate_signature(ctxp->cms_ctx);
insert_signature(ctxp->cms_ctx, ctxp->signum);
close_output(ctxp);
break;
case DAEMONIZE:
rc = daemonize(ctxp->cms_ctx, certdir, fork);
break;
default:
fprintf(stderr, "Incompatible flags (0x%08x): ", action);
for (int i = 1; i < FLAG_LIST_END; i <<= 1) {
if (action & i)
print_flag_name(stderr, i);
}
fprintf(stderr, "\n");
exit(1);
}
pesign_context_free(ctxp);
if (!daemon) {
SECStatus status = NSS_Shutdown();
if (status != SECSuccess) {
fprintf(stderr, "could not shut down NSS: %s",
PORT_ErrorToString(PORT_GetError()));
exit(1);
}
}
return (rc < 0);
}