/**
* gnutls_pkcs12_simple_parse:
* @p12: A pkcs12 type
* @password: optional password used to decrypt the structure, bags and keys.
* @key: a structure to store the parsed private key.
* @chain: the corresponding to key certificate chain (may be %NULL)
* @chain_len: will be updated with the number of additional (may be %NULL)
* @extra_certs: optional pointer to receive an array of additional
* certificates found in the PKCS12 structure (may be %NULL).
* @extra_certs_len: will be updated with the number of additional
* certs (may be %NULL).
* @crl: an optional structure to store the parsed CRL (may be %NULL).
* @flags: should be zero or one of GNUTLS_PKCS12_SP_*
*
* This function parses a PKCS12 structure in @pkcs12 and extracts the
* private key, the corresponding certificate chain, any additional
* certificates and a CRL. The structures in @key, @chain @crl, and @extra_certs
* must not be initialized.
*
* The @extra_certs and @extra_certs_len parameters are optional
* and both may be set to %NULL. If either is non-%NULL, then both must
* be set. The value for @extra_certs is allocated
* using gnutls_malloc().
*
* Encrypted PKCS12 bags and PKCS8 private keys are supported, but
* only with password based security and the same password for all
* operations.
*
* Note that a PKCS12 structure may contain many keys and/or certificates,
* and there is no way to identify which key/certificate pair you want.
* For this reason this function is useful for PKCS12 files that contain
* only one key/certificate pair and/or one CRL.
*
* If the provided structure has encrypted fields but no password
* is provided then this function returns %GNUTLS_E_DECRYPTION_FAILED.
*
* Note that normally the chain constructed does not include self signed
* certificates, to comply with TLS' requirements. If, however, the flag
* %GNUTLS_PKCS12_SP_INCLUDE_SELF_SIGNED is specified then
* self signed certificates will be included in the chain.
*
* Prior to using this function the PKCS #12 structure integrity must
* be verified using gnutls_pkcs12_verify_mac().
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 3.1.0
**/
int
gnutls_pkcs12_simple_parse(gnutls_pkcs12_t p12,
const char *password,
gnutls_x509_privkey_t * key,
gnutls_x509_crt_t ** chain,
unsigned int *chain_len,
gnutls_x509_crt_t ** extra_certs,
unsigned int *extra_certs_len,
gnutls_x509_crl_t * crl, unsigned int flags)
{
gnutls_pkcs12_bag_t bag = NULL;
gnutls_x509_crt_t *_extra_certs = NULL;
unsigned int _extra_certs_len = 0;
gnutls_x509_crt_t *_chain = NULL;
unsigned int _chain_len = 0;
int idx = 0;
int ret;
size_t cert_id_size = 0;
size_t key_id_size = 0;
uint8_t cert_id[20];
uint8_t key_id[20];
int privkey_ok = 0;
unsigned int i;
int elements_in_bag;
*key = NULL;
if (crl)
*crl = NULL;
/* find the first private key */
for (;;) {
ret = gnutls_pkcs12_bag_init(&bag);
if (ret < 0) {
bag = NULL;
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_get_bag(p12, idx, bag);
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
gnutls_pkcs12_bag_deinit(bag);
bag = NULL;
break;
}
if (ret < 0) {
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_bag_get_type(bag, 0);
if (ret < 0) {
gnutls_assert();
goto done;
}
if (ret == GNUTLS_BAG_ENCRYPTED) {
if (password == NULL) {
ret =
gnutls_assert_val
(GNUTLS_E_DECRYPTION_FAILED);
goto done;
}
ret = gnutls_pkcs12_bag_decrypt(bag, password);
if (ret < 0) {
gnutls_assert();
goto done;
}
}
elements_in_bag = gnutls_pkcs12_bag_get_count(bag);
if (elements_in_bag < 0) {
gnutls_assert();
goto done;
}
for (i = 0; i < (unsigned)elements_in_bag; i++) {
int type;
gnutls_datum_t data;
type = gnutls_pkcs12_bag_get_type(bag, i);
if (type < 0) {
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_bag_get_data(bag, i, &data);
if (ret < 0) {
gnutls_assert();
goto done;
}
switch (type) {
case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
if (password == NULL) {
ret =
gnutls_assert_val
(GNUTLS_E_DECRYPTION_FAILED);
goto done;
}
FALLTHROUGH;
case GNUTLS_BAG_PKCS8_KEY:
if (*key != NULL) { /* too simple to continue */
gnutls_assert();
break;
}
ret = gnutls_x509_privkey_init(key);
if (ret < 0) {
gnutls_assert();
goto done;
}
ret = gnutls_x509_privkey_import_pkcs8
(*key, &data, GNUTLS_X509_FMT_DER,
password,
type ==
GNUTLS_BAG_PKCS8_KEY ?
GNUTLS_PKCS_PLAIN : 0);
if (ret < 0) {
gnutls_assert();
goto done;
}
key_id_size = sizeof(key_id);
ret =
gnutls_x509_privkey_get_key_id(*key, 0,
key_id,
&key_id_size);
if (ret < 0) {
gnutls_assert();
goto done;
}
privkey_ok = 1; /* break */
break;
default:
break;
}
}
idx++;
gnutls_pkcs12_bag_deinit(bag);
bag = NULL;
if (privkey_ok != 0) /* private key was found */
break;
}
if (privkey_ok == 0) { /* no private key */
gnutls_assert();
return GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
}
/* now find the corresponding certificate
*/
idx = 0;
bag = NULL;
for (;;) {
ret = gnutls_pkcs12_bag_init(&bag);
if (ret < 0) {
bag = NULL;
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_get_bag(p12, idx, bag);
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
gnutls_pkcs12_bag_deinit(bag);
bag = NULL;
break;
}
if (ret < 0) {
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_bag_get_type(bag, 0);
if (ret < 0) {
gnutls_assert();
goto done;
}
if (ret == GNUTLS_BAG_ENCRYPTED) {
ret = gnutls_pkcs12_bag_decrypt(bag, password);
if (ret < 0) {
gnutls_assert();
goto done;
}
}
elements_in_bag = gnutls_pkcs12_bag_get_count(bag);
if (elements_in_bag < 0) {
gnutls_assert();
goto done;
}
for (i = 0; i < (unsigned)elements_in_bag; i++) {
int type;
gnutls_datum_t data;
gnutls_x509_crt_t this_cert;
type = gnutls_pkcs12_bag_get_type(bag, i);
if (type < 0) {
gnutls_assert();
goto done;
}
ret = gnutls_pkcs12_bag_get_data(bag, i, &data);
if (ret < 0) {
gnutls_assert();
goto done;
}
switch (type) {
case GNUTLS_BAG_CERTIFICATE:
ret = gnutls_x509_crt_init(&this_cert);
if (ret < 0) {
gnutls_assert();
goto done;
}
ret =
gnutls_x509_crt_import(this_cert,
&data,
GNUTLS_X509_FMT_DER);
if (ret < 0) {
gnutls_assert();
gnutls_x509_crt_deinit(this_cert);
this_cert = NULL;
goto done;
}
/* check if the key id match */
cert_id_size = sizeof(cert_id);
ret =
gnutls_x509_crt_get_key_id(this_cert,
0, cert_id,
&cert_id_size);
if (ret < 0) {
gnutls_assert();
gnutls_x509_crt_deinit(this_cert);
this_cert = NULL;
goto done;
}
if (memcmp(cert_id, key_id, cert_id_size) != 0) { /* they don't match - skip the certificate */
_extra_certs =
gnutls_realloc_fast
(_extra_certs,
sizeof(_extra_certs
[0]) *
++_extra_certs_len);
if (!_extra_certs) {
gnutls_assert();
ret =
GNUTLS_E_MEMORY_ERROR;
goto done;
}
_extra_certs
[_extra_certs_len -
1] = this_cert;
this_cert = NULL;
} else {
if (chain && _chain_len == 0) {
_chain =
gnutls_malloc(sizeof
(_chain
[0]) *
(++_chain_len));
if (!_chain) {
gnutls_assert();
ret =
GNUTLS_E_MEMORY_ERROR;
goto done;
}
_chain[_chain_len - 1] =
this_cert;
this_cert = NULL;
} else {
gnutls_x509_crt_deinit
(this_cert);
this_cert = NULL;
}
}
break;
case GNUTLS_BAG_CRL:
if (crl == NULL || *crl != NULL) {
gnutls_assert();
break;
}
ret = gnutls_x509_crl_init(crl);
if (ret < 0) {
gnutls_assert();
goto done;
}
ret =
gnutls_x509_crl_import(*crl, &data,
GNUTLS_X509_FMT_DER);
if (ret < 0) {
gnutls_assert();
gnutls_x509_crl_deinit(*crl);
*crl = NULL;
goto done;
}
break;
case GNUTLS_BAG_ENCRYPTED:
/* XXX Bother to recurse one level down? Unlikely to
use the same password anyway. */
case GNUTLS_BAG_EMPTY:
default:
break;
}
}
idx++;
gnutls_pkcs12_bag_deinit(bag);
bag = NULL;
}
if (chain != NULL) {
if (_chain_len != 1) {
ret = GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
goto done;
}
ret =
make_chain(&_chain, &_chain_len, &_extra_certs,
&_extra_certs_len, flags);
if (ret < 0) {
gnutls_assert();
goto done;
}
}
ret = 0;
done:
if (bag)
gnutls_pkcs12_bag_deinit(bag);
if (ret < 0) {
if (*key) {
gnutls_x509_privkey_deinit(*key);
*key = NULL;
}
if (crl != NULL && *crl != NULL) {
gnutls_x509_crl_deinit(*crl);
*crl = NULL;
}
if (_extra_certs_len && _extra_certs != NULL) {
for (i = 0; i < _extra_certs_len; i++)
gnutls_x509_crt_deinit(_extra_certs[i]);
gnutls_free(_extra_certs);
}
if (_chain_len && _chain != NULL) {
for (i = 0; i < _chain_len; i++)
gnutls_x509_crt_deinit(_chain[i]);
gnutls_free(_chain);
}
return ret;
}
if (extra_certs && _extra_certs_len > 0) {
*extra_certs = _extra_certs;
*extra_certs_len = _extra_certs_len;
} else {
if (extra_certs) {
*extra_certs = NULL;
*extra_certs_len = 0;
}
for (i = 0; i < _extra_certs_len; i++)
gnutls_x509_crt_deinit(_extra_certs[i]);
gnutls_free(_extra_certs);
}
if (chain != NULL) {
*chain = _chain;
*chain_len = _chain_len;
}
return ret;
}
void doit(void)
{
gnutls_pkcs12_t pkcs12;
gnutls_x509_crt_t client;
gnutls_x509_crt_t ca;
gnutls_pkcs12_bag_t bag;
unsigned char key_id_buf[20];
gnutls_datum_t key_id;
int ret, indx;
char outbuf[10240];
size_t size;
unsigned tests, i;
ret = global_init();
if (ret < 0) {
fprintf(stderr, "global_init %d", ret);
exit(1);
}
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
/* Read certs. */
ret = gnutls_x509_crt_init(&client);
if (ret < 0) {
fprintf(stderr, "crt_init: %d", ret);
exit(1);
}
ret =
gnutls_x509_crt_import(client, &client_dat,
GNUTLS_X509_FMT_PEM);
if (ret < 0) {
fprintf(stderr, "crt_import: %d", ret);
exit(1);
}
ret = gnutls_x509_crt_init(&ca);
if (ret < 0) {
fprintf(stderr, "ca_init: %d", ret);
exit(1);
}
ret = gnutls_x509_crt_import(ca, &ca_dat, GNUTLS_X509_FMT_PEM);
if (ret < 0) {
fprintf(stderr, "ca_import: %d", ret);
exit(1);
}
/* Create PKCS#12 structure. */
ret = gnutls_pkcs12_init(&pkcs12);
if (ret < 0) {
fprintf(stderr, "pkcs12_init: %d", ret);
exit(1);
}
/* Generate and add PKCS#12 cert bags. */
#ifndef ENABLE_FIPS140
tests = 2; /* include RC2 */
#else
tests = 1;
#endif
for (i = 0; i < tests; i++) {
ret = gnutls_pkcs12_bag_init(&bag);
if (ret < 0) {
fprintf(stderr, "bag_init: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
ret = gnutls_pkcs12_bag_set_crt(bag, i == 0 ? client : ca);
if (ret < 0) {
fprintf(stderr, "set_crt: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
indx = ret;
ret = gnutls_pkcs12_bag_set_friendly_name(bag, indx,
i ==
0 ? "client" :
"ca");
if (ret < 0) {
fprintf(stderr, "set_friendly_name: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
size = sizeof(key_id_buf);
ret = gnutls_x509_crt_get_key_id(i == 0 ? client : ca, 0,
key_id_buf, &size);
if (ret < 0) {
fprintf(stderr, "get_key_id: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
key_id.data = key_id_buf;
key_id.size = size;
ret = gnutls_pkcs12_bag_set_key_id(bag, indx, &key_id);
if (ret < 0) {
fprintf(stderr, "bag_set_key_id: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
ret = gnutls_pkcs12_bag_encrypt(bag, "pass",
i ==
0 ?
GNUTLS_PKCS8_USE_PKCS12_3DES
:
GNUTLS_PKCS_USE_PKCS12_RC2_40);
if (ret < 0) {
fprintf(stderr, "bag_encrypt: %d: %s", ret,
i == 0 ? "3DES" : "RC2-40");
exit(1);
}
ret = gnutls_pkcs12_set_bag(pkcs12, bag);
if (ret < 0) {
fprintf(stderr, "set_bag: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
gnutls_pkcs12_bag_deinit(bag);
}
/* MAC the structure, export and print. */
ret = gnutls_pkcs12_generate_mac2(pkcs12, GNUTLS_MAC_SHA1, "pass");
if (ret < 0) {
fprintf(stderr, "generate_mac: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
ret = gnutls_pkcs12_verify_mac(pkcs12, "pass");
if (ret < 0) {
fprintf(stderr, "verify_mac: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
ret = gnutls_pkcs12_generate_mac2(pkcs12, GNUTLS_MAC_SHA256, "passwd");
if (ret < 0) {
fprintf(stderr, "generate_mac2: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
ret = gnutls_pkcs12_verify_mac(pkcs12, "passwd");
if (ret < 0) {
fprintf(stderr, "verify_mac2: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
size = sizeof(outbuf);
ret =
gnutls_pkcs12_export(pkcs12, GNUTLS_X509_FMT_PEM, outbuf,
&size);
if (ret < 0) {
fprintf(stderr, "pkcs12_export: %s (%d)\n", gnutls_strerror(ret), ret);
exit(1);
}
if (debug)
fwrite(outbuf, size, 1, stdout);
/* Cleanup. */
gnutls_pkcs12_deinit(pkcs12);
gnutls_x509_crt_deinit(client);
gnutls_x509_crt_deinit(ca);
gnutls_global_deinit();
}
/**
* ntfs_pkcs12_extract_rsa_key
*/
static ntfs_rsa_private_key ntfs_pkcs12_extract_rsa_key(u8 *pfx, int pfx_size,
char *password, char *thumbprint, int thumbprint_size,
NTFS_DF_TYPES *df_type)
{
int err, bag_index, flags;
gnutls_datum_t dpfx, dkey;
gnutls_pkcs12_t pkcs12 = NULL;
gnutls_pkcs12_bag_t bag = NULL;
gnutls_x509_privkey_t pkey = NULL;
gnutls_x509_crt_t crt = NULL;
ntfs_rsa_private_key rsa_key = NULL;
char purpose_oid[100];
size_t purpose_oid_size = sizeof(purpose_oid);
size_t tp_size = thumbprint_size;
BOOL have_thumbprint = FALSE;
*df_type = DF_TYPE_UNKNOWN;
/* Create a pkcs12 structure. */
err = gnutls_pkcs12_init(&pkcs12);
if (err) {
ntfs_log_error("Failed to initialize PKCS#12 structure: %s\n",
gnutls_strerror(err));
return NULL;
}
/* Convert the PFX file (DER format) to native pkcs12 format. */
dpfx.data = pfx;
dpfx.size = pfx_size;
err = gnutls_pkcs12_import(pkcs12, &dpfx, GNUTLS_X509_FMT_DER, 0);
if (err) {
ntfs_log_error("Failed to convert the PFX file from DER to "
"native PKCS#12 format: %s\n",
gnutls_strerror(err));
goto err;
}
/*
* Verify that the password is correct and that the key file has not
* been tampered with. Note if the password has zero length and the
* verification fails, retry with password set to NULL. This is needed
* to get passwordless .pfx files generated with Windows XP SP1 (and
* probably earlier versions of Windows) to work.
*/
retry_verify:
err = gnutls_pkcs12_verify_mac(pkcs12, password);
if (err) {
if (err == GNUTLS_E_MAC_VERIFY_FAILED &&
password && !strlen(password)) {
password = NULL;
goto retry_verify;
}
ntfs_log_error("Failed to verify the MAC: %s Is the "
"password correct?\n", gnutls_strerror(err));
goto err;
}
for (bag_index = 0; ; bag_index++) {
err = gnutls_pkcs12_bag_init(&bag);
if (err) {
ntfs_log_error("Failed to initialize PKCS#12 Bag "
"structure: %s\n",
gnutls_strerror(err));
goto err;
}
err = gnutls_pkcs12_get_bag(pkcs12, bag_index, bag);
if (err) {
if (err == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
err = 0;
break;
}
ntfs_log_error("Failed to obtain Bag from PKCS#12 "
"structure: %s\n",
gnutls_strerror(err));
goto err;
}
check_again:
err = gnutls_pkcs12_bag_get_count(bag);
if (err < 0) {
ntfs_log_error("Failed to obtain Bag count: %s\n",
gnutls_strerror(err));
goto err;
}
err = gnutls_pkcs12_bag_get_type(bag, 0);
if (err < 0) {
ntfs_log_error("Failed to determine Bag type: %s\n",
gnutls_strerror(err));
goto err;
}
flags = 0;
switch (err) {
case GNUTLS_BAG_PKCS8_KEY:
flags = GNUTLS_PKCS_PLAIN;
case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
err = gnutls_pkcs12_bag_get_data(bag, 0, &dkey);
if (err < 0) {
ntfs_log_error("Failed to obtain Bag data: "
"%s\n", gnutls_strerror(err));
goto err;
}
err = gnutls_x509_privkey_init(&pkey);
if (err) {
ntfs_log_error("Failed to initialized "
"private key structure: %s\n",
gnutls_strerror(err));
goto err;
}
/* Decrypt the private key into GNU TLS format. */
err = gnutls_x509_privkey_import_pkcs8(pkey, &dkey,
GNUTLS_X509_FMT_DER, password, flags);
if (err) {
ntfs_log_error("Failed to convert private "
"key from DER to GNU TLS "
"format: %s\n",
gnutls_strerror(err));
goto err;
}
#if 0
/*
* Export the key again, but unencrypted, and output it
* to stderr. Note the output has an RSA header so to
* compare to openssl pkcs12 -nodes -in myfile.pfx
* output need to ignore the part of the key between
* the first "MII..." up to the second "MII...". The
* actual RSA private key begins at the second "MII..."
* and in my testing at least was identical to openssl
* output and was also identical both on big and little
* endian so gnutls should be endianness safe.
*/
char *buf = malloc(8192);
size_t bufsize = 8192;
err = gnutls_x509_privkey_export_pkcs8(pkey,
GNUTLS_X509_FMT_PEM, "", GNUTLS_PKCS_PLAIN, buf,
&bufsize);
if (err) {
ntfs_log_error("eek1\n");
exit(1);
}
ntfs_log_error("%s\n", buf);
free(buf);
#endif
/* Convert the private key to our internal format. */
rsa_key = ntfs_rsa_private_key_import_from_gnutls(pkey);
if (!rsa_key)
goto err;
break;
case GNUTLS_BAG_ENCRYPTED:
err = gnutls_pkcs12_bag_decrypt(bag, password);
if (err) {
ntfs_log_error("Failed to decrypt Bag: %s\n",
gnutls_strerror(err));
goto err;
}
goto check_again;
case GNUTLS_BAG_CERTIFICATE:
err = gnutls_pkcs12_bag_get_data(bag, 0, &dkey);
if (err < 0) {
ntfs_log_error("Failed to obtain Bag data: "
"%s\n", gnutls_strerror(err));
goto err;
}
err = gnutls_x509_crt_init(&crt);
if (err) {
ntfs_log_error("Failed to initialize "
"certificate structure: %s\n",
gnutls_strerror(err));
goto err;
}
err = gnutls_x509_crt_import(crt, &dkey,
GNUTLS_X509_FMT_DER);
if (err) {
ntfs_log_error("Failed to convert certificate "
"from DER to GNU TLS format: "
"%s\n", gnutls_strerror(err));
goto err;
}
err = gnutls_x509_crt_get_key_purpose_oid(crt, 0,
purpose_oid, &purpose_oid_size, NULL);
if (err) {
ntfs_log_error("Failed to get key purpose "
"OID: %s\n",
gnutls_strerror(err));
goto err;
}
purpose_oid[purpose_oid_size - 1] = '\0';
if (!strcmp(purpose_oid,
NTFS_EFS_CERT_PURPOSE_OID_DRF))
*df_type = DF_TYPE_DRF;
else if (!strcmp(purpose_oid,
NTFS_EFS_CERT_PURPOSE_OID_DDF))
*df_type = DF_TYPE_DDF;
else {
ntfs_log_error("Certificate has unknown "
"purpose OID %s.\n",
purpose_oid);
err = EINVAL;
goto err;
}
/* Return the thumbprint to the caller. */
err = gnutls_x509_crt_get_fingerprint(crt,
GNUTLS_DIG_SHA1, thumbprint, &tp_size);
if (err) {
ntfs_log_error("Failed to get thumbprint: "
"%s\n", gnutls_strerror(err));
goto err;
}
if (tp_size != NTFS_SHA1_THUMBPRINT_SIZE) {
ntfs_log_error("Invalid thumbprint size %zd. "
"Should be %d.\n", tp_size,
thumbprint_size);
err = EINVAL;
goto err;
}
have_thumbprint = TRUE;
gnutls_x509_crt_deinit(crt);
crt = NULL;
break;
default:
/* We do not care about other types. */
break;
}
gnutls_pkcs12_bag_deinit(bag);
}
err:
if (rsa_key && (err || *df_type == DF_TYPE_UNKNOWN ||
!have_thumbprint)) {
if (!err)
ntfs_log_error("Key type or thumbprint not found, "
"aborting.\n");
ntfs_rsa_private_key_release(rsa_key);
rsa_key = NULL;
}
if (crt)
gnutls_x509_crt_deinit(crt);
if (pkey)
gnutls_x509_privkey_deinit(pkey);
if (bag)
gnutls_pkcs12_bag_deinit(bag);
if (pkcs12)
gnutls_pkcs12_deinit(pkcs12);
return rsa_key;
}
/* This function will write a pkcs12 structure into a file.
* cert: is a DER encoded certificate
* pkcs8_key: is a PKCS #8 encrypted key (note that this must be
* encrypted using a PKCS #12 cipher, or some browsers will crash)
* password: is the password used to encrypt the PKCS #12 packet.
*/
int
write_pkcs12 (const gnutls_datum_t * cert,
const gnutls_datum_t * pkcs8_key, const char *password)
{
gnutls_pkcs12_t pkcs12;
int ret, bag_index;
gnutls_pkcs12_bag_t bag, key_bag;
char pkcs12_struct[10 * 1024];
size_t pkcs12_struct_size;
FILE *fd;
/* A good idea might be to use gnutls_x509_privkey_get_key_id()
* to obtain a unique ID.
*/
gnutls_datum_t key_id = { "\x00\x00\x07", 3 };
gnutls_global_init ();
/* Firstly we create two helper bags, which hold the certificate,
* and the (encrypted) key.
*/
gnutls_pkcs12_bag_init (&bag);
gnutls_pkcs12_bag_init (&key_bag);
ret = gnutls_pkcs12_bag_set_data (bag, GNUTLS_BAG_CERTIFICATE, cert);
if (ret < 0)
{
fprintf (stderr, "ret: %s\n", gnutls_strerror (ret));
return 1;
}
/* ret now holds the bag's index.
*/
bag_index = ret;
/* Associate a friendly name with the given certificate. Used
* by browsers.
*/
gnutls_pkcs12_bag_set_friendly_name (bag, bag_index, "My name");
/* Associate the certificate with the key using a unique key
* ID.
*/
gnutls_pkcs12_bag_set_key_id (bag, bag_index, &key_id);
/* use weak encryption for the certificate.
*/
gnutls_pkcs12_bag_encrypt (bag, password, GNUTLS_PKCS_USE_PKCS12_RC2_40);
/* Now the key.
*/
ret = gnutls_pkcs12_bag_set_data (key_bag,
GNUTLS_BAG_PKCS8_ENCRYPTED_KEY,
pkcs8_key);
if (ret < 0)
{
fprintf (stderr, "ret: %s\n", gnutls_strerror (ret));
return 1;
}
/* Note that since the PKCS #8 key is already encrypted we don't
* bother encrypting that bag.
*/
bag_index = ret;
gnutls_pkcs12_bag_set_friendly_name (key_bag, bag_index, "My name");
gnutls_pkcs12_bag_set_key_id (key_bag, bag_index, &key_id);
/* The bags were filled. Now create the PKCS #12 structure.
*/
gnutls_pkcs12_init (&pkcs12);
/* Insert the two bags in the PKCS #12 structure.
*/
gnutls_pkcs12_set_bag (pkcs12, bag);
gnutls_pkcs12_set_bag (pkcs12, key_bag);
/* Generate a message authentication code for the PKCS #12
* structure.
*/
gnutls_pkcs12_generate_mac (pkcs12, password);
pkcs12_struct_size = sizeof (pkcs12_struct);
ret =
gnutls_pkcs12_export (pkcs12, GNUTLS_X509_FMT_DER, pkcs12_struct,
&pkcs12_struct_size);
if (ret < 0)
{
fprintf (stderr, "ret: %s\n", gnutls_strerror (ret));
return 1;
}
fd = fopen (OUTFILE, "w");
if (fd == NULL)
{
fprintf (stderr, "cannot open file\n");
return 1;
}
fwrite (pkcs12_struct, 1, pkcs12_struct_size, fd);
fclose (fd);
gnutls_pkcs12_bag_deinit (bag);
gnutls_pkcs12_bag_deinit (key_bag);
gnutls_pkcs12_deinit (pkcs12);
return 0;
}
static int tls_get_bag_at_index(gnutls_pkcs12_t *const p12,
const int bag_index,
const char *const password,
gnutls_x509_privkey_t *const key,
gnutls_x509_crt_t *const certs,
int *const certs_nr)
{
gnutls_pkcs12_bag_t bag = NULL;
int bag_count;
int status = 0;
int ret;
int i;
assert(p12 != NULL);
assert(key != NULL);
assert(certs != NULL);
assert(certs_nr != NULL);
assert((*certs_nr) >= 0);
assert((*certs_nr) <= MAX_CERTS);
ret = gnutls_pkcs12_bag_init(&bag);
if(ret < 0)
{
trace(LOG_ERR, "failed to init bag #%d", bag_index + 1);
goto error;
}
ret = gnutls_pkcs12_get_bag(*p12, bag_index, bag);
if(ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
{
/* ignore */
status = 2;
goto free_bag;
}
if(ret < 0)
{
trace(LOG_ERR, "failed to retrieve bag #%d", bag_index + 1);
goto free_bag;
}
ret = gnutls_pkcs12_bag_get_type(bag, 0);
if(ret == GNUTLS_BAG_ENCRYPTED)
{
ret = gnutls_pkcs12_bag_decrypt(bag, password);
if(ret < 0)
{
trace(LOG_ERR, "failed to decrypt bag #%d", bag_index + 1);
goto free_bag;
}
}
bag_count = gnutls_pkcs12_bag_get_count(bag);
trace(LOG_DEBUG, "bag count = %d\n", bag_count);
/* first, find the key */
for(i = 0; i < bag_count; i++)
{
gnutls_x509_privkey_t new_key;
gnutls_x509_crt_t new_cert;
if(!tls_get_item_from_bag_at(&bag, i, password, &new_key, &new_cert))
{
trace(LOG_ERR, "failed to load item #%d of bag #%d",
i + 1, bag_index + 1);
goto free_bag;
}
/* if we found a new key, store it */
if(new_key != NULL)
{
if((*key) != NULL)
{
trace(LOG_ERR, "more than one key found in PKCS#12");
goto free_bag;
}
*key = new_key;
}
/* if we found a new certificate, store it in the array */
if(new_cert != NULL)
{
if((*certs_nr) >= MAX_CERTS)
{
trace(LOG_ERR, "too many certificates, abort");
gnutls_x509_crt_deinit(new_cert);
goto free_bag;
}
certs[*certs_nr] = new_cert;
(*certs_nr)++;
}
}
status = 1;
free_bag:
gnutls_pkcs12_bag_deinit(bag);
error:
return status;
}
/* Parses a PKCS#12 structure and loads the certificate, private key
* and friendly name if possible. Returns zero on success, non-zero
* on error. */
static int pkcs12_parse(gnutls_pkcs12 p12, gnutls_x509_privkey *pkey,
gnutls_x509_crt *x5, char **friendly_name,
const char *password)
{
gnutls_pkcs12_bag bag = NULL;
int i, j, ret = 0;
for (i = 0; ret == 0; ++i) {
if (bag) gnutls_pkcs12_bag_deinit(bag);
ret = gnutls_pkcs12_bag_init(&bag);
if (ret < 0) continue;
ret = gnutls_pkcs12_get_bag(p12, i, bag);
if (ret < 0) continue;
gnutls_pkcs12_bag_decrypt(bag, password);
for (j = 0; ret == 0 && j < gnutls_pkcs12_bag_get_count(bag); ++j) {
gnutls_pkcs12_bag_type type;
gnutls_datum data;
if (friendly_name && *friendly_name == NULL) {
char *name = NULL;
gnutls_pkcs12_bag_get_friendly_name(bag, j, &name);
if (name) {
if (name[0] == '.') name++; /* weird GnuTLS bug? */
*friendly_name = ne_strdup(name);
}
}
type = gnutls_pkcs12_bag_get_type(bag, j);
switch (type) {
case GNUTLS_BAG_PKCS8_KEY:
case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
/* Ignore any but the first key encountered; really
* need to match up keyids. */
if (*pkey) break;
gnutls_x509_privkey_init(pkey);
ret = gnutls_pkcs12_bag_get_data(bag, j, &data);
if (ret < 0) continue;
ret = gnutls_x509_privkey_import_pkcs8(*pkey, &data,
GNUTLS_X509_FMT_DER,
password,
0);
if (ret < 0) continue;
break;
case GNUTLS_BAG_CERTIFICATE:
/* Ignore any but the first cert encountered; again,
* really need to match up keyids. */
if (*x5) break;
ret = gnutls_x509_crt_init(x5);
if (ret < 0) continue;
ret = gnutls_pkcs12_bag_get_data(bag, j, &data);
if (ret < 0) continue;
ret = gnutls_x509_crt_import(*x5, &data, GNUTLS_X509_FMT_DER);
if (ret < 0) continue;
break;
default:
break;
}
}
}
/* Make sure last bag is freed */
if (bag) gnutls_pkcs12_bag_deinit(bag);
/* Free in case of error */
if (ret < 0 && ret != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
if (*x5) gnutls_x509_crt_deinit(*x5);
if (*pkey) gnutls_x509_privkey_deinit(*pkey);
if (friendly_name && *friendly_name) ne_free(*friendly_name);
}
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) ret = 0;
return ret;
}
/**
* gnutls_system_key_add_x509:
* @crt: the certificate to be added
* @privkey: the key to be added
* @label: the friendly name to describe the key
* @cert_url: if non-NULL it will contain an allocated value with the certificate URL
* @key_url: if non-NULL it will contain an allocated value with the key URL
*
* This function will added the given key and certificate pair,
* to the system list.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 3.4.0
**/
int gnutls_system_key_add_x509(gnutls_x509_crt_t crt,
gnutls_x509_privkey_t privkey, const char *label,
char **cert_url, char **key_url)
{
HCERTSTORE store = NULL;
CRYPT_DATA_BLOB pfx;
gnutls_datum_t _pfx = { NULL, 0 };
gnutls_pkcs12_t p12 = NULL;
gnutls_pkcs12_bag_t bag1 = NULL, bag2 = NULL;
uint8_t id[MAX_WID_SIZE];
size_t id_size;
gnutls_datum_t kid;
int ret;
if (ncrypt_init == 0)
return gnutls_assert_val(GNUTLS_E_UNIMPLEMENTED_FEATURE);
if (label == NULL)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
id_size = sizeof(id);
ret = gnutls_x509_crt_get_key_id(crt, 0, id, &id_size);
if (ret < 0)
return gnutls_assert_val(ret);
kid.data = id;
kid.size = id_size;
/* the idea: import the cert and private key into PKCS #12
* format, export it into pfx, and import it into store */
ret = gnutls_pkcs12_init(&p12);
if (ret < 0)
return gnutls_assert_val(ret);
ret = gnutls_pkcs12_bag_init(&bag1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_bag_set_crt(bag1, crt);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_bag_set_key_id(bag1, 0, &kid);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
if (label)
gnutls_pkcs12_bag_set_friendly_name(bag1, 0, label);
ret = gnutls_pkcs12_bag_init(&bag2);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_bag_set_privkey(bag2, privkey, NULL, 0);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_bag_set_key_id(bag2, 0, &kid);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
if (label)
gnutls_pkcs12_bag_set_friendly_name(bag2, 0, label);
ret = gnutls_pkcs12_set_bag(p12, bag1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_set_bag(p12, bag2);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_generate_mac(p12, "123456");
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = gnutls_pkcs12_export2(p12, GNUTLS_X509_FMT_DER, &_pfx);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
pfx.cbData = _pfx.size;
pfx.pbData = _pfx.data;
store = PFXImportCertStore(&pfx, L"123456", 0);
if (store == NULL) {
gnutls_assert();
ret = GNUTLS_E_INVALID_REQUEST;
goto cleanup;
}
if (cert_url || key_url) {
unsigned char sha[20];
CRYPT_HASH_BLOB blob;
const CERT_CONTEXT *cert = NULL;
gnutls_datum_t data;
ret = gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_DER, &data);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
gnutls_hash_fast(GNUTLS_DIG_SHA1, data.data, data.size,
sha);
gnutls_free(data.data);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
blob.cbData = sizeof(sha);
blob.pbData = sha;
cert = CertFindCertificateInStore(store,
X509_ASN_ENCODING,
0,
CERT_FIND_SHA1_HASH,
&blob, NULL);
if (cert == NULL) {
gnutls_assert();
ret = GNUTLS_E_KEY_IMPORT_FAILED;
goto cleanup;
}
ret = get_win_urls(cert, cert_url, key_url, NULL, NULL);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
}
ret = 0;
cleanup:
if (p12 != NULL)
gnutls_pkcs12_deinit(p12);
if (bag1 != NULL)
gnutls_pkcs12_bag_deinit(bag1);
if (bag2 != NULL)
gnutls_pkcs12_bag_deinit(bag2);
if (store != NULL)
CertCloseStore(store, 0);
gnutls_free(_pfx.data);
return ret;
}