void privkey_sign(struct peer *peer, const void *src, size_t len,
struct signature *sig)
{
struct sha256_double h;
sha256_double(&h, memcheck(src, len), len);
sign_hash(peer->dstate->secpctx,
&peer->dstate->secret->privkey, &h, sig);
}
/* Only does SIGHASH_ALL */
void sign_tx_input(secp256k1_context *secpctx,
struct bitcoin_tx *tx,
unsigned int in,
const u8 *subscript, size_t subscript_len,
const struct privkey *privkey, const struct pubkey *key,
struct signature *sig)
{
struct sha256_double hash;
sha256_tx_one_input(tx, in, subscript, subscript_len, &hash);
dump_tx("Signing", tx, in, subscript, subscript_len, key, &hash);
sign_hash(secpctx, privkey, &hash, sig);
}
bool ikev2_calculate_rsa_sha1(struct state *st
, enum phase1_role role
, unsigned char *idhash
, pb_stream *a_pbs)
{
unsigned char signed_octets[SHA1_DIGEST_SIZE+16];
size_t signed_len;
const struct connection *c = st->st_connection;
const struct RSA_private_key *k = get_RSA_private_key(c);
unsigned int sz;
if (k == NULL)
return 0; /* failure: no key to use */
sz = k->pub.k;
/*
* this is the prefix of the ASN/DER goop that lives inside RSA-SHA1
* signatures. If the signing hash changes, this needs to change
* too, but this function is specific to RSA-SHA1.
*/
memcpy(signed_octets, der_digestinfo, der_digestinfo_len);
ikev2_calculate_sighash(st, role, idhash
, st->st_firstpacket_me
, signed_octets+der_digestinfo_len);
signed_len = der_digestinfo_len + SHA1_DIGEST_SIZE;
passert(RSA_MIN_OCTETS <= sz && 4 + signed_len < sz && sz <= RSA_MAX_OCTETS);
DBG(DBG_CRYPT
, DBG_dump("v2rsa octets", signed_octets, signed_len));
{
u_char sig_val[RSA_MAX_OCTETS];
/* now generate signature blob */
sign_hash(k, signed_octets, signed_len
, sig_val, sz);
out_raw(sig_val, sz, a_pbs, "rsa signature");
}
return TRUE;
}
bool ikev2_calculate_rsa_sha1(struct state *st,
enum phase1_role role,
unsigned char *idhash,
pb_stream *a_pbs)
{
unsigned char signed_octets[SHA1_DIGEST_SIZE + 16];
size_t signed_len;
const struct connection *c = st->st_connection;
const struct RSA_private_key *k = get_RSA_private_key(c);
unsigned int sz;
if (k == NULL)
return FALSE; /* failure: no key to use */
sz = k->pub.k;
memcpy(signed_octets, der_digestinfo, der_digestinfo_len);
ikev2_calculate_sighash(st, role, idhash,
st->st_firstpacket_me,
signed_octets + der_digestinfo_len);
signed_len = der_digestinfo_len + SHA1_DIGEST_SIZE;
passert(RSA_MIN_OCTETS <= sz && 4 + signed_len < sz &&
sz <= RSA_MAX_OCTETS);
DBG(DBG_CRYPT,
DBG_dump("v2rsa octets", signed_octets, signed_len));
{
/* now generate signature blob */
u_char sig_val[RSA_MAX_OCTETS];
int shr;
shr = sign_hash(k, signed_octets, signed_len, sig_val, sz);
if (shr == 0)
return FALSE;
passert(shr == (int)sz);
if (!out_raw(sig_val, sz, a_pbs, "rsa signature"))
return FALSE;
}
return TRUE;
}
/**
* Sign the file at the specified path using the private
* key with the specified label on a token with the specified pin
* and optionally with the beginning hash state saved in the
* specified metadata_t from the previous signing.
*/
static void sign(const char* path, const char* pin, const char* label,
metadata_t* md)
{
int n, err, sig_size;
sha256_context ctx;
sha256_context ctx_cpy;
const unsigned char *pCms = 0;
unsigned char buf[0x10000], hash[32]; /* 32 => 256-bit sha256 */
char sig_path[MAX_PATH] = "";
FILE * fpi = 0, * fpo = 0;
/* Open the data file for reading */
fpi = fopen(path, "rb");
if (!fpi) {
int e = errno;
log_err("error opening file '%s' for reading: %s", path, strerror(e));
goto sign_error;
}
/* Get the saved hash context or start a new one */
if (!md) { /* No metadata */
/* Start a new hash context */
sha256_starts(&ctx);
} else { /* Metadata exists */
/* Restore the saved hash context */
int ok;
/* Get the saved hashed content length (hcl) */
offset_t hcl = sizeof(hcl) == 4 ? md->cll : (offset_t)md->clh << 32 | md->cll;
/* Adjust the hcl back to the last block boundary */
hcl = hcl - hcl % sizeof(ctx.buffer);
/* Restore the "total" (hcl) field to the hash context */
ctx.total[0] = (unsigned int)hcl;
ctx.total[1] = (unsigned int)(hcl >> 32);
/* Restore the state field to the hash context */
memcpy(&ctx.state, &md->state, sizeof(ctx.state));
/* Seek to the position of hcl minus one & verify last byte still exists */
ok = hcl <= 0 || fseeko(fpi, hcl - 1, SEEK_SET) == 0 && getc(fpi) >= 0;
if (!ok) {
if (sizeof(hcl) == 4) /* 32-bit hcl */
log_err("error seeking in '%s' to pos %d", path, (int)hcl);
else /* 64-bit hcl */
log_err("error seeking in '%s' to pos %lld", path, hcl);
goto sign_error;
}
}
/* Create/Continue a SHA-256 hash of the file */
for (;;) {
int n = fread(buf, 1, sizeof(buf), fpi);
if (n <= 0)
break;
sha256_update(&ctx, buf, n);
}
/* Check for error during read */
if (ferror(fpi)) {
log_err("error reading file '%s'", path);
goto sign_error;
}
/* Close the data file */
err = fclose(fpi);
if (err) {
int e = errno;
log_err("error closing file '%s': %s", path, strerror(e));
goto sign_error;
}
fpi = 0;
/* Clone the unfinalized hash context to save in the metadata */
memcpy(&ctx_cpy, &ctx, sizeof(ctx));
/* Finalize the hash for the current sig */
sha256_finish(&ctx, hash);
/* Sign the hash with the token; creates CMS document & puts ptr in pCMS
WARNING: sign_hash is not re-entrant (see sc-hsm-ultralite.c) */
sig_size = sign_hash(pin, label, hash, sizeof(hash), &pCms);
if (sig_size <= 0) {
goto sign_error;
}
/* Open the new sig file for writing */
n = snprintf(sig_path, sizeof(sig_path), "%s%s", path, sig_ext);
if (n < 0 || n >= sizeof(sig_path)) {
log_err("error building sig file path '%s%s'", path, sig_ext);
goto sign_error;
}
fpo = fopen(sig_path, "wb");
if (!fpo) {
int e = errno;
log_err("error opening sig file '%s' for writing: %s",
sig_path, strerror(e));
goto sign_error;
}
/* Write the CMS document to the sig file */
n = fwrite(pCms, 1, sig_size, fpo);
if (n != sig_size) {
log_err("error writing to sig file '%s'", sig_path);
goto sign_error;
}
/* Save "total" (hcl) & unfinalized hash state at end of sig file */
err = write_metadata(fpo, &ctx_cpy);
if (err) {
log_err("error writing metadata to sig file '%s'", sig_path);
goto sign_error;
}
/* Close the sig file */
err = fclose(fpo);
if (err) {
log_err("error closing sig file '%s'", sig_path);
goto sign_error;
}
fpo = 0;
/* Success */
log_inf("'%s' created", sig_path);
return;
sign_error:
/* Close input file stream, if open */
if (fpi) {
err = fclose(fpi);
if (err) {
int e = errno;
log_err("error closing file '%s': %s",
path, strerror(e));
}
}
/* Close output file stream, if open */
if (fpo) {
err = fclose(fpo);
if (err) {
int e = errno;
log_err("error closing sig file '%s': %s",
sig_path, strerror(e));
}
}
return;
}
int main(int argc, char **argv)
{
int i;
FILE* fp;
unsigned char buf[0x10000], hash[32]; /* 32 => 256-bit sha256 */
sha256_context ctx;
char name[256];
const unsigned char *pCms = 0;
int count = argc >= 4 ? atoi(argv[3]) : 1;
int wait = argc >= 5 ? atoi(argv[4]) : 10000;
#if defined(_WIN32) && defined(_DEBUG)
atexit((void(*)(void))_CrtDumpMemoryLeaks);
#endif
/* Check args */
if (argc < 3) {
printf("Usage: pin label [count [wait-in-milliseconds]]\nSign this executable (%s).\n", argv[0]);
return 1;
}
/* Create a SHA-256 hash of this executable */
sha256_starts(&ctx);
fp = fopen(argv[0], "rb");
if (!fp) {
int e = errno;
printf("error opening file '%s': %s\n", argv[0], strerror(e));
return e;
}
for (;;) {
int n = fread(buf, 1, sizeof(buf), fp);
if (n <= 0)
break;
sha256_update(&ctx, buf, n);
}
fclose(fp);
sha256_finish(&ctx, hash);
/* Sign the hash of this executable n times, where n = count */
for (i = 0; i < count; i++) {
int len;
long start, end;
if (i > 0 && count > 1) {
printf("wait %d milliseconds for next signature\n", wait);
usleep(wait * 1000);
}
start = GetTickCount();
len = sign_hash(argv[1], argv[2], hash, sizeof(hash), &pCms);
end = GetTickCount();
printf("sign_hash returned: %d, time used: %ld ms\n", len, end - start);
if (len <= 0) /* sign_hash error */
break;
sprintf(name, "%s.p7s", argv[0]);
fp = fopen(name, "wb");\
if (!fp) {
int e = errno;
printf("error opening file '%s': %s\n", name, strerror(e));
break;
}
fwrite(pCms, 1, len, fp);
fclose(fp);
}
release_template();
return 0;
}
