// SPDX-License-Identifier: LGPL-2.1+
/*
* Dan Williams <dcbw@redhat.com>
* Copyright (C) 2007 - 2018 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-crypto.h"
#include <strings.h>
#include <unistd.h>
#include <stdlib.h>
#include "nm-glib-aux/nm-secret-utils.h"
#include "nm-glib-aux/nm-io-utils.h"
#include "nm-crypto-impl.h"
#include "nm-utils.h"
#include "nm-errors.h"
#define PEM_RSA_KEY_BEGIN "-----BEGIN RSA PRIVATE KEY-----"
#define PEM_RSA_KEY_END "-----END RSA PRIVATE KEY-----"
#define PEM_DSA_KEY_BEGIN "-----BEGIN DSA PRIVATE KEY-----"
#define PEM_DSA_KEY_END "-----END DSA PRIVATE KEY-----"
#define PEM_CERT_BEGIN "-----BEGIN CERTIFICATE-----"
#define PEM_CERT_END "-----END CERTIFICATE-----"
#define PEM_PKCS8_ENC_KEY_BEGIN "-----BEGIN ENCRYPTED PRIVATE KEY-----"
#define PEM_PKCS8_ENC_KEY_END "-----END ENCRYPTED PRIVATE KEY-----"
#define PEM_PKCS8_DEC_KEY_BEGIN "-----BEGIN PRIVATE KEY-----"
#define PEM_PKCS8_DEC_KEY_END "-----END PRIVATE KEY-----"
#define PEM_TPM2_WRAPPED_KEY_BEGIN "-----BEGIN TSS2 PRIVATE KEY-----"
#define PEM_TPM2_WRAPPED_KEY_END "-----END TSS2 PRIVATE KEY-----"
#define PEM_TPM2_OLD_WRAPPED_KEY_BEGIN "-----BEGIN TSS2 KEY BLOB-----"
#define PEM_TPM2_OLD_WRAPPED_KEY_END "-----END TSS2 KEY BLOB-----"
/*****************************************************************************/
static const NMCryptoCipherInfo cipher_infos[] = {
#define _CI(_cipher, _name, _digest_len, _real_iv_len) \
[(_cipher) - 1] = { .cipher = _cipher, .name = ""_name"", .digest_len = _digest_len, .real_iv_len = _real_iv_len }
_CI (NM_CRYPTO_CIPHER_DES_EDE3_CBC, "DES-EDE3-CBC", 24, 8),
_CI (NM_CRYPTO_CIPHER_DES_CBC, "DES-CBC", 8, 8),
_CI (NM_CRYPTO_CIPHER_AES_128_CBC, "AES-128-CBC", 16, 16),
_CI (NM_CRYPTO_CIPHER_AES_192_CBC, "AES-192-CBC", 24, 16),
_CI (NM_CRYPTO_CIPHER_AES_256_CBC, "AES-256-CBC", 32, 16),
};
const NMCryptoCipherInfo *
nm_crypto_cipher_get_info (NMCryptoCipherType cipher)
{
g_return_val_if_fail (cipher > NM_CRYPTO_CIPHER_UNKNOWN && (gsize) cipher < G_N_ELEMENTS (cipher_infos) + 1, NULL);
#if NM_MORE_ASSERTS > 10
{
int i, j;
for (i = 0; i < (int) G_N_ELEMENTS (cipher_infos); i++) {
const NMCryptoCipherInfo *info = &cipher_infos[i];
nm_assert (info->cipher == (NMCryptoCipherType) (i + 1));
nm_assert (info->name && info->name[0]);
for (j = 0; j < i; j++)
nm_assert (g_ascii_strcasecmp (info->name, cipher_infos[j].name) != 0);
}
}
#endif
return &cipher_infos[cipher - 1];
}
const NMCryptoCipherInfo *
nm_crypto_cipher_get_info_by_name (const char *cipher_name, gssize p_len)
{
int i;
nm_assert (nm_crypto_cipher_get_info (NM_CRYPTO_CIPHER_DES_CBC)->cipher == NM_CRYPTO_CIPHER_DES_CBC);
if (p_len < 0) {
if (!cipher_name)
return FALSE;
p_len = strlen (cipher_name);
}
for (i = 0; i < (int) G_N_ELEMENTS (cipher_infos); i++) {
const NMCryptoCipherInfo *info = &cipher_infos[i];
if ( (gsize) p_len == strlen (info->name)
&& g_ascii_strncasecmp (info->name, cipher_name, p_len) == 0)
return info;
}
return NULL;
}
/*****************************************************************************/
static gboolean
find_tag (const char *tag,
const guint8 *data,
gsize data_len,
gsize start_at,
gsize *out_pos)
{
const guint8 *p;
gsize taglen;
nm_assert (out_pos);
nm_assert (start_at <= data_len);
taglen = strlen (tag);
p = memmem (&data[start_at], data_len - start_at, tag, taglen);
if (!p)
return FALSE;
*out_pos = p - data;
nm_assert (memcmp (&data[*out_pos], tag, taglen) == 0);
return TRUE;
}
#define DEK_INFO_TAG "DEK-Info: "
#define PROC_TYPE_TAG "Proc-Type: "
static char *
_extract_line (const guint8 **p, const guint8 *p_end)
{
const guint8 *x, *x0;
nm_assert (p);
nm_assert (p_end);
nm_assert (*p);
nm_assert (*p < p_end);
x = x0 = *p;
while (TRUE) {
if (x == p_end) {
*p = p_end;
break;
}
if (*x == '\0') {
/* the data contains embedded NUL. This is the end. */
*p = p_end;
break;
}
if (*x == '\n') {
*p = x + 1;
break;
}
x++;
}
if (x == x0)
return NULL;
return g_strndup ((char *) x0, x - x0);
}
static gboolean
parse_old_openssl_key_file (const guint8 *data,
gsize data_len,
NMSecretPtr *out_parsed,
NMCryptoKeyType *out_key_type,
NMCryptoCipherType *out_cipher,
char **out_iv,
GError **error)
{
gsize start = 0, end = 0;
nm_auto_free_secret char *str = NULL;
char *str_p;
gsize str_len;
int enc_tags = 0;
NMCryptoKeyType key_type;
nm_auto_clear_secret_ptr NMSecretPtr parsed = { 0 };
nm_auto_free_secret char *iv = NULL;
NMCryptoCipherType cipher = NM_CRYPTO_CIPHER_UNKNOWN;
const char *start_tag;
const char *end_tag;
const guint8 *data_start, *data_end;
nm_assert (!out_parsed || (out_parsed->len == 0 && !out_parsed->bin));
nm_assert (!out_iv || !*out_iv);
NM_SET_OUT (out_key_type, NM_CRYPTO_KEY_TYPE_UNKNOWN);
NM_SET_OUT (out_cipher, NM_CRYPTO_CIPHER_UNKNOWN);
if (find_tag (PEM_RSA_KEY_BEGIN, data, data_len, 0, &start)) {
key_type = NM_CRYPTO_KEY_TYPE_RSA;
start_tag = PEM_RSA_KEY_BEGIN;
end_tag = PEM_RSA_KEY_END;
} else if (find_tag (PEM_DSA_KEY_BEGIN, data, data_len, 0, &start)) {
key_type = NM_CRYPTO_KEY_TYPE_DSA;
start_tag = PEM_DSA_KEY_BEGIN;
end_tag = PEM_DSA_KEY_END;
} else {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("PEM key file had no start tag"));
return FALSE;
}
start += strlen (start_tag);
if (!find_tag (end_tag, data, data_len, start, &end)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("PEM key file had no end tag '%s'."),
end_tag);
return FALSE;
}
str_len = end - start + 1;
str = g_new (char, str_len);
str[0] = '\0';
str_p = str;
data_start = &data[start];
data_end = &data[end];
while (data_start < data_end) {
nm_auto_free_secret char *line = NULL;
char *p;
line = _extract_line (&data_start, data_end);
if (!line)
continue;
p = nm_secret_strchomp (nm_str_skip_leading_spaces (line));
if (!strncmp (p, PROC_TYPE_TAG, strlen (PROC_TYPE_TAG))) {
if (enc_tags++ != 0 || str_p != str) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: Proc-Type was not first tag."));
return FALSE;
}
p += strlen (PROC_TYPE_TAG);
if (strcmp (p, "4,ENCRYPTED")) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: unknown Proc-Type tag '%s'."),
p);
return FALSE;
}
} else if (!strncmp (p, DEK_INFO_TAG, strlen (DEK_INFO_TAG))) {
const NMCryptoCipherInfo *cipher_info;
char *comma;
gsize p_len;
if (enc_tags++ != 1 || str_p != str) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: DEK-Info was not the second tag."));
return FALSE;
}
p += strlen (DEK_INFO_TAG);
/* Grab the IV first */
comma = strchr (p, ',');
if (!comma || (*(comma + 1) == '\0')) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: no IV found in DEK-Info tag."));
return FALSE;
}
p_len = comma - p;
comma++;
if (!g_ascii_isxdigit (*comma)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: invalid format of IV in DEK-Info tag."));
return FALSE;
}
nm_free_secret (iv);
iv = g_strdup (comma);
/* Get the private key cipher */
cipher_info = nm_crypto_cipher_get_info_by_name (p, p_len);
if (!cipher_info) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Malformed PEM file: unknown private key cipher '%s'."),
p);
return FALSE;
}
cipher = cipher_info->cipher;
} else {
if (enc_tags == 1) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
"Malformed PEM file: both Proc-Type and DEK-Info tags are required.");
return FALSE;
}
nm_utils_strbuf_append_str (&str_p, &str_len, p);
nm_assert (str_len > 0);
}
}
parsed.bin = (guint8 *) g_base64_decode (str, &parsed.len);
if (!parsed.bin || parsed.len == 0) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Could not decode private key."));
nm_secret_ptr_clear (&parsed);
return FALSE;
}
NM_SET_OUT (out_key_type, key_type);
NM_SET_OUT (out_iv, g_steal_pointer (&iv));
NM_SET_OUT (out_cipher, cipher);
nm_secret_ptr_move (out_parsed, &parsed);
return TRUE;
}
static gboolean
parse_pkcs8_key_file (const guint8 *data,
gsize data_len,
NMSecretPtr *parsed,
gboolean *out_encrypted,
GError **error)
{
gsize start = 0, end = 0;
const char *start_tag = NULL, *end_tag = NULL;
gboolean encrypted = FALSE;
nm_auto_free_secret char *der_base64 = NULL;
nm_assert (parsed);
nm_assert (!parsed->bin);
nm_assert (parsed->len == 0);
nm_assert (out_encrypted);
/* Try encrypted first, decrypted next */
if (find_tag (PEM_PKCS8_ENC_KEY_BEGIN, data, data_len, 0, &start)) {
start_tag = PEM_PKCS8_ENC_KEY_BEGIN;
end_tag = PEM_PKCS8_ENC_KEY_END;
encrypted = TRUE;
} else if (find_tag (PEM_PKCS8_DEC_KEY_BEGIN, data, data_len, 0, &start)) {
start_tag = PEM_PKCS8_DEC_KEY_BEGIN;
end_tag = PEM_PKCS8_DEC_KEY_END;
encrypted = FALSE;
} else {
g_set_error_literal (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to find expected PKCS#8 start tag."));
return FALSE;
}
start += strlen (start_tag);
if (!find_tag (end_tag, data, data_len, start, &end)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to find expected PKCS#8 end tag '%s'."),
end_tag);
return FALSE;
}
/* g_base64_decode() wants a NULL-terminated string */
der_base64 = g_strndup ((char *) &data[start], end - start);
parsed->bin = (guint8 *) g_base64_decode (der_base64, &parsed->len);
if (!parsed->bin || parsed->len == 0) {
g_set_error_literal (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to decode PKCS#8 private key."));
nm_secret_ptr_clear (parsed);
return FALSE;
}
*out_encrypted = encrypted;
return TRUE;
}
static gboolean
parse_tpm2_wrapped_key_file (const guint8 *data,
gsize data_len,
gboolean *out_encrypted,
GError **error)
{
gsize start = 0, end = 0;
const char *start_tag = NULL, *end_tag = NULL;
nm_assert (out_encrypted);
if (find_tag (PEM_TPM2_WRAPPED_KEY_BEGIN, data, data_len, 0, &start)) {
start_tag = PEM_TPM2_WRAPPED_KEY_BEGIN;
end_tag = PEM_TPM2_WRAPPED_KEY_END;
} else if (find_tag (PEM_TPM2_OLD_WRAPPED_KEY_BEGIN, data, data_len, 0, &start)) {
start_tag = PEM_TPM2_OLD_WRAPPED_KEY_BEGIN;
end_tag = PEM_TPM2_OLD_WRAPPED_KEY_END;
} else {
g_set_error_literal (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to find expected TSS start tag."));
return FALSE;
}
start += strlen (start_tag);
if (!find_tag (end_tag, data, data_len, start, &end)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to find expected TSS end tag '%s'."),
end_tag);
return FALSE;
}
*out_encrypted = FALSE;
return TRUE;
}
static gboolean
file_read_contents (const char *filename,
NMSecretPtr *out_contents,
GError **error)
{
nm_assert (out_contents);
nm_assert (out_contents->len == 0);
nm_assert (!out_contents->str);
return nm_utils_file_get_contents (-1,
filename,
100*1024*1024,
NM_UTILS_FILE_GET_CONTENTS_FLAG_SECRET,
&out_contents->str,
&out_contents->len,
NULL,
error);
}
GBytes *
nm_crypto_read_file (const char *filename,
GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr contents = { 0 };
g_return_val_if_fail (filename, NULL);
if (!file_read_contents (filename, &contents, error))
return NULL;
return nm_secret_copy_to_gbytes (contents.bin, contents.len);
}
/*
* Convert a hex string into bytes.
*/
static guint8 *
_nmtst_convert_iv (const char *src,
gsize *out_len,
GError **error)
{
gsize i, num;
gs_free guint8 *c = NULL;
int c0, c1;
nm_assert (src);
num = strlen (src);
if ( num == 0
|| (num % 2) != 0) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("IV must be an even number of bytes in length."));
return NULL;
}
num /= 2;
c = g_malloc (num + 1);
/* defensively add trailing NUL. This function returns binary data,
* do not assume it's NUL terminated. */
c[num] = '\0';
for (i = 0; i < num; i++) {
if ( ((c0 = nm_utils_hexchar_to_int (*(src++))) < 0)
|| ((c1 = nm_utils_hexchar_to_int (*(src++))) < 0)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("IV contains non-hexadecimal digits."));
nm_explicit_bzero (c, i);
return FALSE;
}
c[i] = (c0 << 4) + c1;
}
*out_len = num;
return g_steal_pointer (&c);
}
guint8 *
nmtst_crypto_make_des_aes_key (NMCryptoCipherType cipher,
const guint8 *salt,
gsize salt_len,
const char *password,
gsize *out_len,
GError **error)
{
guint8 *key;
const NMCryptoCipherInfo *cipher_info;
g_return_val_if_fail (salt != NULL, NULL);
g_return_val_if_fail (salt_len >= 8, NULL);
g_return_val_if_fail (password != NULL, NULL);
g_return_val_if_fail (out_len != NULL, NULL);
*out_len = 0;
cipher_info = nm_crypto_cipher_get_info (cipher);
g_return_val_if_fail (cipher_info, NULL);
if (password[0] == '\0')
return NULL;
key = g_malloc (cipher_info->digest_len);
nm_crypto_md5_hash (salt,
8,
(guint8 *) password,
strlen (password),
key,
cipher_info->digest_len);
*out_len = cipher_info->digest_len;
return key;
}
static gboolean
_nmtst_decrypt_key (NMCryptoCipherType cipher,
const guint8 *data,
gsize data_len,
const char *iv,
const char *password,
NMSecretPtr *parsed,
GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr bin_iv = { 0 };
nm_auto_clear_secret_ptr NMSecretPtr key = { 0 };
nm_assert (password);
nm_assert (cipher != NM_CRYPTO_CIPHER_UNKNOWN);
nm_assert (iv);
nm_assert (parsed);
nm_assert (!parsed->bin);
nm_assert (parsed->len == 0);
bin_iv.bin = _nmtst_convert_iv (iv, &bin_iv.len, error);
if (!bin_iv.bin)
return FALSE;
if (bin_iv.len < 8) {
g_set_error (error,
NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("IV must contain at least 8 characters"));
return FALSE;
}
/* Convert the password and IV into a DES or AES key */
key.bin = nmtst_crypto_make_des_aes_key (cipher, bin_iv.bin, bin_iv.len, password, &key.len, error);
if (!key.bin || !key.len)
return FALSE;
parsed->bin = _nmtst_crypto_decrypt (cipher,
data,
data_len,
bin_iv.bin,
bin_iv.len,
key.bin,
key.len,
&parsed->len,
error);
if (!parsed->bin || parsed->len == 0) {
nm_secret_ptr_clear (parsed);
return FALSE;
}
return TRUE;
}
GBytes *
nmtst_crypto_decrypt_openssl_private_key_data (const guint8 *data,
gsize data_len,
const char *password,
NMCryptoKeyType *out_key_type,
GError **error)
{
NMCryptoKeyType key_type = NM_CRYPTO_KEY_TYPE_UNKNOWN;
nm_auto_clear_secret_ptr NMSecretPtr parsed = { 0 };
nm_auto_free_secret char *iv = NULL;
NMCryptoCipherType cipher = NM_CRYPTO_CIPHER_UNKNOWN;
g_return_val_if_fail (data != NULL, NULL);
NM_SET_OUT (out_key_type, NM_CRYPTO_KEY_TYPE_UNKNOWN);
if (!_nm_crypto_init (error))
return NULL;
if (!parse_old_openssl_key_file (data, data_len, &parsed, &key_type, &cipher, &iv, NULL)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Unable to determine private key type."));
return NULL;
}
NM_SET_OUT (out_key_type, key_type);
if (password) {
nm_auto_clear_secret_ptr NMSecretPtr parsed2 = { 0 };
if (cipher == NM_CRYPTO_CIPHER_UNKNOWN || !iv) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_PASSWORD,
_("Password provided, but key was not encrypted."));
return NULL;
}
if (!_nmtst_decrypt_key (cipher,
parsed.bin,
parsed.len,
iv,
password,
&parsed2,
error))
return NULL;
return nm_secret_copy_to_gbytes (parsed2.bin, parsed2.len);
}
if (cipher != NM_CRYPTO_CIPHER_UNKNOWN || iv)
return NULL;
return nm_secret_copy_to_gbytes (parsed.bin, parsed.len);
}
GBytes *
nmtst_crypto_decrypt_openssl_private_key (const char *file,
const char *password,
NMCryptoKeyType *out_key_type,
GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr contents = { 0 };
if (!_nm_crypto_init (error))
return NULL;
if (!file_read_contents (file, &contents, error))
return NULL;
return nmtst_crypto_decrypt_openssl_private_key_data (contents.bin,
contents.len,
password,
out_key_type,
error);
}
static gboolean
extract_pem_cert_data (const guint8 *contents,
gsize contents_len,
NMSecretPtr *out_cert,
GError **error)
{
gsize start = 0;
gsize end = 0;
nm_auto_free_secret char *der_base64 = NULL;
nm_assert (contents);
nm_assert (out_cert);
nm_assert (out_cert->len == 0);
nm_assert (!out_cert->ptr);
if (!find_tag (PEM_CERT_BEGIN, contents, contents_len, 0, &start)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("PEM certificate had no start tag '%s'."),
PEM_CERT_BEGIN);
return FALSE;
}
start += strlen (PEM_CERT_BEGIN);
if (!find_tag (PEM_CERT_END, contents, contents_len, start, &end)) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("PEM certificate had no end tag '%s'."),
PEM_CERT_END);
return FALSE;
}
/* g_base64_decode() wants a NULL-terminated string */
der_base64 = g_strndup ((const char *) &contents[start], end - start);
out_cert->bin = (guint8 *) g_base64_decode (der_base64, &out_cert->len);
if (!out_cert->bin || !out_cert->len) {
g_set_error (error, NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to decode certificate."));
nm_secret_ptr_clear (out_cert);
return FALSE;
}
return TRUE;
}
gboolean
nm_crypto_load_and_verify_certificate (const char *file,
NMCryptoFileFormat *out_file_format,
GBytes **out_certificate,
GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr contents = { 0 };
g_return_val_if_fail (file, FALSE);
nm_assert (!error || !*error);
if (!_nm_crypto_init (error))
goto out;
if (!file_read_contents (file, &contents, error))
goto out;
if (contents.len == 0) {
g_set_error (error,
NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Certificate file is empty"));
goto out;
}
/* Check for PKCS#12 */
if (nm_crypto_is_pkcs12_data (contents.bin, contents.len, NULL)) {
NM_SET_OUT (out_file_format, NM_CRYPTO_FILE_FORMAT_PKCS12);
NM_SET_OUT (out_certificate, nm_secret_copy_to_gbytes (contents.bin, contents.len));
return TRUE;
}
/* Check for plain DER format */
if (contents.len > 2 && contents.bin[0] == 0x30 && contents.bin[1] == 0x82) {
if (_nm_crypto_verify_x509 (contents.bin, contents.len, NULL)) {
NM_SET_OUT (out_file_format, NM_CRYPTO_FILE_FORMAT_X509);
NM_SET_OUT (out_certificate, nm_secret_copy_to_gbytes (contents.bin, contents.len));
return TRUE;
}
} else {
nm_auto_clear_secret_ptr NMSecretPtr pem_cert = { 0 };
if (extract_pem_cert_data (contents.bin, contents.len, &pem_cert, NULL)) {
if (_nm_crypto_verify_x509 (pem_cert.bin, pem_cert.len, NULL)) {
NM_SET_OUT (out_file_format, NM_CRYPTO_FILE_FORMAT_X509);
NM_SET_OUT (out_certificate, nm_secret_copy_to_gbytes (contents.bin, contents.len));
return TRUE;
}
}
}
g_set_error (error,
NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Failed to recognize certificate"));
out:
NM_SET_OUT (out_file_format, NM_CRYPTO_FILE_FORMAT_UNKNOWN);
NM_SET_OUT (out_certificate, NULL);
return FALSE;
}
gboolean
nm_crypto_is_pkcs12_data (const guint8 *data,
gsize data_len,
GError **error)
{
GError *local = NULL;
gboolean success;
if (!data_len) {
g_set_error (error,
NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("Certificate file is empty"));
return FALSE;
}
g_return_val_if_fail (data != NULL, FALSE);
if (!_nm_crypto_init (error))
return FALSE;
success = _nm_crypto_verify_pkcs12 (data, data_len, NULL, &local);
if (success == FALSE) {
/* If the error was just a decryption error, then it's pkcs#12 */
if (local) {
if (g_error_matches (local, NM_CRYPTO_ERROR, NM_CRYPTO_ERROR_DECRYPTION_FAILED)) {
success = TRUE;
g_error_free (local);
} else
g_propagate_error (error, local);
}
}
return success;
}
gboolean
nm_crypto_is_pkcs12_file (const char *file, GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr contents = { 0 };
g_return_val_if_fail (file != NULL, FALSE);
if (!_nm_crypto_init (error))
return FALSE;
if (!file_read_contents (file, &contents, error))
return FALSE;
return nm_crypto_is_pkcs12_data (contents.bin, contents.len, error);
}
/* Verifies that a private key can be read, and if a password is given, that
* the private key can be decrypted with that password.
*/
NMCryptoFileFormat
nm_crypto_verify_private_key_data (const guint8 *data,
gsize data_len,
const char *password,
gboolean *out_is_encrypted,
GError **error)
{
NMCryptoFileFormat format = NM_CRYPTO_FILE_FORMAT_UNKNOWN;
gboolean is_encrypted = FALSE;
g_return_val_if_fail (data != NULL, NM_CRYPTO_FILE_FORMAT_UNKNOWN);
g_return_val_if_fail (out_is_encrypted == NULL || *out_is_encrypted == FALSE, NM_CRYPTO_FILE_FORMAT_UNKNOWN);
if (!_nm_crypto_init (error))
return NM_CRYPTO_FILE_FORMAT_UNKNOWN;
/* Check for PKCS#12 first */
if (nm_crypto_is_pkcs12_data (data, data_len, NULL)) {
is_encrypted = TRUE;
if ( !password
|| _nm_crypto_verify_pkcs12 (data, data_len, password, error))
format = NM_CRYPTO_FILE_FORMAT_PKCS12;
} else {
nm_auto_clear_secret_ptr NMSecretPtr parsed = { 0 };
/* Maybe it's PKCS#8 */
if (parse_pkcs8_key_file (data, data_len, &parsed, &is_encrypted, NULL)) {
if ( !password
|| _nm_crypto_verify_pkcs8 (parsed.bin, parsed.len, is_encrypted, password, error))
format = NM_CRYPTO_FILE_FORMAT_RAW_KEY;
} else if (parse_tpm2_wrapped_key_file (data, data_len, &is_encrypted, NULL)) {
format = NM_CRYPTO_FILE_FORMAT_RAW_KEY;
} else {
NMCryptoCipherType cipher;
nm_auto_free_secret char *iv = NULL;
/* Or it's old-style OpenSSL */
if (parse_old_openssl_key_file (data, data_len, NULL, NULL, &cipher, &iv, NULL)) {
format = NM_CRYPTO_FILE_FORMAT_RAW_KEY;
is_encrypted = (cipher != NM_CRYPTO_CIPHER_UNKNOWN && iv);
}
}
}
if ( format == NM_CRYPTO_FILE_FORMAT_UNKNOWN
&& error
&& !*error) {
g_set_error (error,
NM_CRYPTO_ERROR,
NM_CRYPTO_ERROR_INVALID_DATA,
_("not a valid private key"));
}
if (out_is_encrypted)
*out_is_encrypted = is_encrypted;
return format;
}
NMCryptoFileFormat
nm_crypto_verify_private_key (const char *filename,
const char *password,
gboolean *out_is_encrypted,
GError **error)
{
nm_auto_clear_secret_ptr NMSecretPtr contents = { 0 };
g_return_val_if_fail (filename != NULL, NM_CRYPTO_FILE_FORMAT_UNKNOWN);
if (!_nm_crypto_init (error))
return NM_CRYPTO_FILE_FORMAT_UNKNOWN;
if (!file_read_contents (filename, &contents, error))
return NM_CRYPTO_FILE_FORMAT_UNKNOWN;
return nm_crypto_verify_private_key_data (contents.bin, contents.len, password, out_is_encrypted, error);
}
void
nm_crypto_md5_hash (const guint8 *salt,
gsize salt_len,
const guint8 *password,
gsize password_len,
guint8 *buffer,
gsize buflen)
{
nm_auto_free_checksum GChecksum *ctx = NULL;
nm_auto_clear_static_secret_ptr const NMSecretPtr digest = NM_SECRET_PTR_STATIC (NM_UTILS_CHECKSUM_LENGTH_MD5);
gsize bufidx = 0;
int i;
g_return_if_fail (password_len == 0 || password);
g_return_if_fail (buffer);
g_return_if_fail (buflen > 0);
g_return_if_fail (salt_len == 0 || salt);
ctx = g_checksum_new (G_CHECKSUM_MD5);
for (;;) {
if (password_len > 0)
g_checksum_update (ctx, (const guchar *) password, password_len);
if (salt_len > 0)
g_checksum_update (ctx, (const guchar *) salt, salt_len);
nm_utils_checksum_get_digest_len (ctx, digest.bin, NM_UTILS_CHECKSUM_LENGTH_MD5);
for (i = 0; i < NM_UTILS_CHECKSUM_LENGTH_MD5; i++) {
if (bufidx >= buflen)
return;
buffer[bufidx++] = digest.bin[i];
}
g_checksum_reset (ctx);
g_checksum_update (ctx, digest.ptr, NM_UTILS_CHECKSUM_LENGTH_MD5);
}
}
gboolean
nm_crypto_randomize (void *buffer, gsize buffer_len, GError **error)
{
return _nm_crypto_randomize (buffer, buffer_len, error);
}
/**
* nmtst_crypto_rsa_key_encrypt:
* @data: (array length=len): RSA private key data to be encrypted
* @len: length of @data
* @in_password: (allow-none): existing password to use, if any
* @out_password: (out) (allow-none): if @in_password was %NULL, a random
* password will be generated and returned in this argument
* @error: detailed error information on return, if an error occurred
*
* Encrypts the given RSA private key data with the given password (or generates
* a password if no password was given) and converts the data to PEM format
* suitable for writing to a file. It uses Triple DES cipher for the encryption.
*
* Returns: (transfer full): on success, PEM-formatted data suitable for writing
* to a PEM-formatted certificate/private key file.
**/
GBytes *
nmtst_crypto_rsa_key_encrypt (const guint8 *data,
gsize len,
const char *in_password,
char **out_password,
GError **error)
{
guint8 salt[8];
nm_auto_clear_secret_ptr NMSecretPtr key = { 0 };
nm_auto_clear_secret_ptr NMSecretPtr enc = { 0 };
gs_unref_ptrarray GPtrArray *pem = NULL;
nm_auto_free_secret char *tmp_password = NULL;
nm_auto_free_secret char *enc_base64 = NULL;
gsize enc_base64_len;
const char *p;
gsize ret_len, ret_idx;
guint i;
NMSecretBuf *ret;
g_return_val_if_fail (data, NULL);
g_return_val_if_fail (len > 0, NULL);
g_return_val_if_fail (!out_password || !*out_password, NULL);
/* Make the password if needed */
if (!in_password) {
nm_auto_clear_static_secret_ptr NMSecretPtr pw_buf = NM_SECRET_PTR_STATIC (32);
if (!nm_crypto_randomize (pw_buf.bin, pw_buf.len, error))
return NULL;
tmp_password = nm_utils_bin2hexstr (pw_buf.bin, pw_buf.len, -1);
in_password = tmp_password;
}
if (!nm_crypto_randomize (salt, sizeof (salt), error))
return NULL;
key.bin = nmtst_crypto_make_des_aes_key (NM_CRYPTO_CIPHER_DES_EDE3_CBC, salt, sizeof (salt), in_password, &key.len, NULL);
if (!key.bin)
g_return_val_if_reached (NULL);
enc.bin = _nmtst_crypto_encrypt (NM_CRYPTO_CIPHER_DES_EDE3_CBC, data, len, salt, sizeof (salt), key.bin, key.len, &enc.len, error);
if (!enc.bin)
return NULL;
/* What follows is not the most efficient way to construct the pem
* file line-by-line. At least, it makes sure, that the data will be cleared
* again and not left around in memory.
*
* If this would not be test code, we should improve the implementation
* to avoid some of the copying. */
pem = g_ptr_array_new_with_free_func ((GDestroyNotify) nm_free_secret);
g_ptr_array_add (pem, g_strdup ("-----BEGIN RSA PRIVATE KEY-----\n"));
g_ptr_array_add (pem, g_strdup ("Proc-Type: 4,ENCRYPTED\n"));
/* Convert the salt to a hex string */
g_ptr_array_add (pem, g_strdup_printf ("DEK-Info: %s,",
nm_crypto_cipher_get_info (NM_CRYPTO_CIPHER_DES_EDE3_CBC)->name));
g_ptr_array_add (pem, nm_utils_bin2hexstr (salt, sizeof (salt), sizeof (salt) * 2));
g_ptr_array_add (pem, g_strdup ("\n\n"));
/* Convert the encrypted key to a base64 string */
enc_base64 = g_base64_encode ((const guchar *) enc.bin, enc.len);
enc_base64_len = strlen (enc_base64);
for (p = enc_base64; (p - enc_base64) < (ptrdiff_t) enc_base64_len; p += 64) {
g_ptr_array_add (pem, g_strndup (p, 64));
g_ptr_array_add (pem, g_strdup ("\n"));
}
g_ptr_array_add (pem, g_strdup ("-----END RSA PRIVATE KEY-----\n"));
ret_len = 0;
for (i = 0; i < pem->len; i++)
ret_len += strlen (pem->pdata[i]);
ret = nm_secret_buf_new (ret_len + 1);
ret_idx = 0;
for (i = 0; i < pem->len; i++) {
const char *line = pem->pdata[i];
gsize line_l = strlen (line);
memcpy (&ret->bin[ret_idx], line, line_l);
ret_idx += line_l;
nm_assert (ret_idx <= ret_len);
}
nm_assert (ret_idx == ret_len);
ret->bin[ret_len] = '\0';
NM_SET_OUT (out_password, g_strdup (tmp_password));
return nm_secret_buf_to_gbytes_take (ret, ret_len);
}