diff options
Diffstat (limited to 'libnm-core/nm-crypto.c')
| -rw-r--r-- | libnm-core/nm-crypto.c | 1035 |
1 files changed, 0 insertions, 1035 deletions
diff --git a/libnm-core/nm-crypto.c b/libnm-core/nm-crypto.c deleted file mode 100644 index 7a6e8d18..00000000 --- a/libnm-core/nm-crypto.c +++ /dev/null @@ -1,1035 +0,0 @@ -/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ - -/* - * Dan Williams <dcbw@redhat.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301 USA. - * - * Copyright 2007 - 2018 Red Hat, Inc. - */ - -#include "nm-default.h" - -#include "nm-crypto.h" - -#include <string.h> -#include <strings.h> -#include <unistd.h> -#include <stdlib.h> - -#include "nm-utils/nm-secret-utils.h" -#include "nm-utils/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-----" - -/*****************************************************************************/ - -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) -{ - gsize i, taglen; - gsize len = data_len - start_at; - - g_return_val_if_fail (out_pos != NULL, FALSE); - - taglen = strlen (tag); - if (len >= taglen) { - for (i = 0; i < len - taglen + 1; i++) { - if (memcmp (data + start_at + i, tag, taglen) == 0) { - *out_pos = start_at + i; - return TRUE; - } - } - } - return FALSE; -} - -#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_clear_secret_ptr NMSecretPtr data_content = { 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; - gs_free guchar *der = NULL; - 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 -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, - error) >= 0; -} - -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 }; - gs_free char *output = NULL; - - 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 { - 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; -#define MD5_DIGEST_LEN 16 - nm_auto_clear_static_secret_ptr const NMSecretPtr digest = NM_SECRET_PTR_STATIC (MD5_DIGEST_LEN); - gsize bufidx = 0; - int i; - - nm_assert (g_checksum_type_get_length (G_CHECKSUM_MD5) == MD5_DIGEST_LEN); - - 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 (;;) { - gsize digest_len; - - 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); - - digest_len = MD5_DIGEST_LEN; - g_checksum_get_digest (ctx, digest.bin, &digest_len); - nm_assert (digest_len == MD5_DIGEST_LEN); - - for (i = 0; i < MD5_DIGEST_LEN; i++) { - if (bufidx >= buflen) - return; - buffer[bufidx++] = digest.bin[i]; - } - - g_checksum_reset (ctx); - g_checksum_update (ctx, digest.ptr, MD5_DIGEST_LEN); - } -} - -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); -} |