New upstream version 1.13.90 upstream/1.13.90

1 files changed, 542 insertions, 0 deletions

diff --git a/libnm-core/nm-crypto-nss.c b/libnm-core/nm-crypto-nss.c
new file mode 100644
index 00000000..711dde4b
--- /dev/null
+++ b/libnm-core/nm-crypto-nss.c
@@ -0,0 +1,542 @@
+/* -*- 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 - 2009 Red Hat, Inc.
+ */
+
+#include "nm-default.h"
+
+#include "nm-crypto-impl.h"
+
+#include <prinit.h>
+#include <nss.h>
+#include <pk11pub.h>
+#include <pkcs11t.h>
+#include <cert.h>
+#include <prerror.h>
+#include <p12.h>
+#include <ciferfam.h>
+#include <p12plcy.h>
+
+#include "nm-utils/nm-secret-utils.h"
+#include "nm-errors.h"
+
+/*****************************************************************************/
+
+static gboolean
+_get_cipher_info (NMCryptoCipherType cipher,
+                  CK_MECHANISM_TYPE *out_cipher_mech,
+                  guint8 *out_real_iv_len)
+{
+	static const CK_MECHANISM_TYPE cipher_mechs[] = {
+		[NM_CRYPTO_CIPHER_DES_EDE3_CBC] = CKM_DES3_CBC_PAD,
+		[NM_CRYPTO_CIPHER_DES_CBC]      = CKM_DES_CBC_PAD,
+		[NM_CRYPTO_CIPHER_AES_128_CBC]  = CKM_AES_CBC_PAD,
+		[NM_CRYPTO_CIPHER_AES_192_CBC]  = CKM_AES_CBC_PAD,
+		[NM_CRYPTO_CIPHER_AES_256_CBC]  = CKM_AES_CBC_PAD,
+	};
+
+	g_return_val_if_fail (_NM_INT_NOT_NEGATIVE (cipher) && (gsize) cipher < G_N_ELEMENTS (cipher_mechs), FALSE);
+
+	if (!cipher_mechs[cipher])
+		return FALSE;
+
+	NM_SET_OUT (out_cipher_mech, cipher_mechs[cipher]);
+	NM_SET_OUT (out_real_iv_len, nm_crypto_cipher_get_info (cipher)->real_iv_len);
+	return TRUE;
+}
+
+/*****************************************************************************/
+
+gboolean
+_nm_crypto_init (GError **error)
+{
+	static gboolean initialized = FALSE;
+	SECStatus ret;
+
+	if (initialized)
+		return TRUE;
+
+	PR_Init (PR_USER_THREAD, PR_PRIORITY_NORMAL, 1);
+	ret = NSS_NoDB_Init (NULL);
+	if (ret != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_FAILED,
+		             _("Failed to initialize the crypto engine: %d."),
+		             PR_GetError ());
+		PR_Cleanup ();
+		return FALSE;
+	}
+
+	SEC_PKCS12EnableCipher (PKCS12_RC4_40, 1);
+	SEC_PKCS12EnableCipher (PKCS12_RC4_128, 1);
+	SEC_PKCS12EnableCipher (PKCS12_RC2_CBC_40, 1);
+	SEC_PKCS12EnableCipher (PKCS12_RC2_CBC_128, 1);
+	SEC_PKCS12EnableCipher (PKCS12_DES_56, 1);
+	SEC_PKCS12EnableCipher (PKCS12_DES_EDE3_168, 1);
+	SEC_PKCS12SetPreferredCipher (PKCS12_DES_EDE3_168, 1);
+
+	initialized = TRUE;
+	return TRUE;
+}
+
+guint8 *
+_nmtst_crypto_decrypt (NMCryptoCipherType cipher,
+                       const guint8 *data,
+                       gsize data_len,
+                       const guint8 *iv,
+                       gsize iv_len,
+                       const guint8 *key,
+                       gsize key_len,
+                       gsize *out_len,
+                       GError **error)
+{
+	CK_MECHANISM_TYPE cipher_mech;
+	PK11SlotInfo *slot = NULL;
+	SECItem key_item;
+	PK11SymKey *sym_key = NULL;
+	SECItem *sec_param = NULL;
+	PK11Context *ctx = NULL;
+	nm_auto_clear_secret_ptr NMSecretPtr output = { 0 };
+	SECStatus s;
+	gboolean success = FALSE;
+	int decrypted_len = 0;
+	unsigned extra = 0;
+	unsigned pad_len = 0;
+	guint32 i;
+	guint8 real_iv_len;
+
+	if (!_get_cipher_info (cipher, &cipher_mech, &real_iv_len)) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_UNKNOWN_CIPHER,
+		             _("Unsupported key cipher for decryption"));
+		return NULL;
+	}
+
+	if (iv_len < real_iv_len) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_INVALID_DATA,
+		             _("Invalid IV length (must be at least %u)."),
+		             (guint) real_iv_len);
+		return NULL;
+	}
+
+	if (!_nm_crypto_init (error))
+		return NULL;
+
+	slot = PK11_GetBestSlot (cipher_mech, NULL);
+	if (!slot) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_FAILED,
+		             _("Failed to initialize the decryption cipher slot."));
+		goto out;
+	}
+
+	key_item.data = (unsigned char *) key;
+	key_item.len = key_len;
+	sym_key = PK11_ImportSymKey (slot, cipher_mech, PK11_OriginUnwrap, CKA_DECRYPT, &key_item, NULL);
+	if (!sym_key) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to set symmetric key for decryption."));
+		goto out;
+	}
+
+	key_item.data = (unsigned char *) iv;
+	key_item.len = real_iv_len;
+	sec_param = PK11_ParamFromIV (cipher_mech, &key_item);
+	if (!sec_param) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to set IV for decryption."));
+		goto out;
+	}
+
+	ctx = PK11_CreateContextBySymKey (cipher_mech, CKA_DECRYPT, sym_key, sec_param);
+	if (!ctx) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to initialize the decryption context."));
+		goto out;
+	}
+
+	output.len = data_len;
+	output.bin = g_malloc (data_len);
+
+	s = PK11_CipherOp (ctx,
+	                   (unsigned char *) output.bin,
+	                   &decrypted_len,
+	                   output.len,
+	                   data,
+	                   data_len);
+	if (s != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to decrypt the private key: %d."),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	if (decrypted_len > data_len) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to decrypt the private key: decrypted data too large."));
+		goto out;
+	}
+
+	s = PK11_DigestFinal (ctx,
+	                      (unsigned char *) &output.bin[decrypted_len],
+	                      &extra,
+	                      data_len - decrypted_len);
+	if (s != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to finalize decryption of the private key: %d."),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	decrypted_len += extra;
+	pad_len = data_len - decrypted_len;
+
+	/* Check if the padding at the end of the decrypted data is valid */
+	if (pad_len == 0 || pad_len > real_iv_len) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Failed to decrypt the private key: unexpected padding length."));
+		goto out;
+	}
+
+	/* Validate tail padding; last byte is the padding size, and all pad bytes
+	 * should contain the padding size.
+	 */
+	for (i = pad_len; i > 0; i--) {
+		if (output.bin[data_len - i] != pad_len) {
+			g_set_error (error, NM_CRYPTO_ERROR,
+			             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+			             _("Failed to decrypt the private key."));
+			goto out;
+		}
+	}
+
+	success = TRUE;
+
+out:
+	if (ctx)
+		PK11_DestroyContext (ctx, PR_TRUE);
+	if (sym_key)
+		PK11_FreeSymKey (sym_key);
+	if (sec_param)
+		SECITEM_FreeItem (sec_param, PR_TRUE);
+	if (slot)
+		PK11_FreeSlot (slot);
+
+	if (!success)
+		return NULL;
+
+	if (decrypted_len < output.len)
+		nm_explicit_bzero (&output.bin[decrypted_len], output.len - decrypted_len);
+	*out_len = decrypted_len;
+	return g_steal_pointer (&output.bin);
+}
+
+guint8 *
+_nmtst_crypto_encrypt (NMCryptoCipherType cipher,
+                       const guint8 *data,
+                       gsize data_len,
+                       const guint8 *iv,
+                       gsize iv_len,
+                       const guint8 *key,
+                       gsize key_len,
+                       gsize *out_len,
+                       GError **error)
+{
+	SECStatus ret;
+	CK_MECHANISM_TYPE cipher_mech = CKM_DES3_CBC_PAD;
+	PK11SlotInfo *slot = NULL;
+	SECItem key_item = { .data = (unsigned char *) key, .len = key_len };
+	SECItem iv_item = { .data = (unsigned char *) iv, .len = iv_len };
+	PK11SymKey *sym_key = NULL;
+	SECItem *sec_param = NULL;
+	PK11Context *ctx = NULL;
+	nm_auto_clear_secret_ptr NMSecretPtr padded_buf = { 0 };
+	nm_auto_clear_secret_ptr NMSecretPtr output = { 0 };
+	int encrypted_len = 0, i;
+	gboolean success = FALSE;
+	gsize pad_len;
+
+	if (   cipher == NM_CRYPTO_CIPHER_DES_CBC
+	    || !_get_cipher_info (cipher, &cipher_mech, NULL)) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_UNKNOWN_CIPHER,
+		             _("Unsupported key cipher for encryption"));
+		return NULL;
+	}
+
+	if (!_nm_crypto_init (error))
+		return NULL;
+
+	slot = PK11_GetBestSlot (cipher_mech, NULL);
+	if (!slot) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_FAILED,
+		             _("Failed to initialize the encryption cipher slot."));
+		return NULL;
+	}
+
+	sym_key = PK11_ImportSymKey (slot, cipher_mech, PK11_OriginUnwrap, CKA_ENCRYPT, &key_item, NULL);
+	if (!sym_key) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
+		             _("Failed to set symmetric key for encryption."));
+		goto out;
+	}
+
+	sec_param = PK11_ParamFromIV (cipher_mech, &iv_item);
+	if (!sec_param) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
+		             _("Failed to set IV for encryption."));
+		goto out;
+	}
+
+	ctx = PK11_CreateContextBySymKey (cipher_mech, CKA_ENCRYPT, sym_key, sec_param);
+	if (!ctx) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
+		             _("Failed to initialize the encryption context."));
+		goto out;
+	}
+
+	/* If data->len % ivlen == 0, then we add another complete block
+	 * onto the end so that the decrypter knows there's padding.
+	 */
+	pad_len = iv_len - (data_len % iv_len);
+
+	padded_buf.len = data_len + pad_len;
+	padded_buf.bin = g_malloc (padded_buf.len);
+
+	memcpy (padded_buf.bin, data, data_len);
+	for (i = 0; i < pad_len; i++)
+		padded_buf.bin[data_len + i] = (guint8) (pad_len & 0xFF);
+
+	output.len = padded_buf.len;
+	output.bin = g_malloc (output.len);
+
+	ret = PK11_CipherOp (ctx, output.bin, &encrypted_len, output.len, padded_buf.bin, padded_buf.len);
+	if (ret != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
+		             _("Failed to encrypt: %d."),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	if (encrypted_len != output.len) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
+		             _("Unexpected amount of data after encrypting."));
+		goto out;
+	}
+
+	success = TRUE;
+
+out:
+	if (ctx)
+		PK11_DestroyContext (ctx, PR_TRUE);
+	if (sec_param)
+		SECITEM_FreeItem (sec_param, PR_TRUE);
+	if (sym_key)
+		PK11_FreeSymKey (sym_key);
+	if (slot)
+		PK11_FreeSlot (slot);
+
+	if (!success)
+		return NULL;
+
+	*out_len = output.len;
+	return g_steal_pointer (&output.bin);
+}
+
+gboolean
+_nm_crypto_verify_x509 (const guint8 *data,
+                        gsize len,
+                        GError **error)
+{
+	CERTCertificate *cert;
+
+	if (!_nm_crypto_init (error))
+		return FALSE;
+
+	/* Try DER/PEM first */
+	cert = CERT_DecodeCertFromPackage ((char *) data, len);
+	if (!cert) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_INVALID_DATA,
+		             _("Couldn't decode certificate: %d"),
+		             PORT_GetError ());
+		return FALSE;
+	}
+
+	CERT_DestroyCertificate (cert);
+	return TRUE;
+}
+
+gboolean
+_nm_crypto_verify_pkcs12 (const guint8 *data,
+                          gsize data_len,
+                          const char *password,
+                          GError **error)
+{
+	SEC_PKCS12DecoderContext *p12ctx = NULL;
+	SECItem pw = { 0 };
+	PK11SlotInfo *slot = NULL;
+	SECStatus s;
+	gboolean success = FALSE;
+
+	g_return_val_if_fail (!error || !*error, FALSE);
+
+	if (!_nm_crypto_init (error))
+		return FALSE;
+
+	/* PKCS#12 passwords are apparently UCS2 BIG ENDIAN, and NSS doesn't do
+	 * any conversions for us.
+	 */
+	if (password && *password) {
+		nm_auto_clear_secret_ptr NMSecretPtr ucs2_password = { 0 };
+
+		if (g_utf8_validate (password, -1, NULL)) {
+			long ucs2_chars;
+
+			ucs2_password.bin = (guint8 *) g_utf8_to_utf16 (password, strlen (password), NULL, &ucs2_chars, NULL);
+
+			/* cannot fail, because password is valid UTF-8*/
+			nm_assert (ucs2_password.bin && ucs2_chars > 0);
+
+			ucs2_password.len = ucs2_chars * 2;
+		}
+
+		if (!ucs2_password.bin || ucs2_password.len == 0) {
+			g_set_error (error, NM_CRYPTO_ERROR,
+			             NM_CRYPTO_ERROR_INVALID_PASSWORD,
+			             _("Password must be UTF-8"));
+			return FALSE;
+		}
+
+		pw.data = PORT_ZAlloc (ucs2_password.len + 2);
+		memcpy (pw.data, ucs2_password.bin, ucs2_password.len);
+		pw.len = ucs2_password.len + 2;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+		{
+			guint16 *p, *p_end;
+
+			p_end = (guint16 *) &(((guint8 *) pw.data)[ucs2_password.len]);
+			for (p = (guint16 *) pw.data; p < p_end; p++)
+				*p = GUINT16_SWAP_LE_BE (*p);
+		}
+#endif
+	}
+
+	slot = PK11_GetInternalKeySlot ();
+	if (!slot) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_FAILED,
+		             _("Couldn't initialize slot"));
+		goto out;
+	}
+
+	p12ctx = SEC_PKCS12DecoderStart (&pw, slot, NULL, NULL, NULL, NULL, NULL, NULL);
+	if (!p12ctx) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_FAILED,
+		             _("Couldn't initialize PKCS#12 decoder: %d"),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	s = SEC_PKCS12DecoderUpdate (p12ctx, (guint8 *)data, data_len);
+	if (s != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_INVALID_DATA,
+		             _("Couldn't decode PKCS#12 file: %d"),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	s = SEC_PKCS12DecoderVerify (p12ctx);
+	if (s != SECSuccess) {
+		g_set_error (error, NM_CRYPTO_ERROR,
+		             NM_CRYPTO_ERROR_DECRYPTION_FAILED,
+		             _("Couldn't verify PKCS#12 file: %d"),
+		             PORT_GetError ());
+		goto out;
+	}
+
+	success = TRUE;
+
+out:
+	if (p12ctx)
+		SEC_PKCS12DecoderFinish (p12ctx);
+	if (slot)
+		PK11_FreeSlot (slot);
+
+	if (pw.data)
+		SECITEM_ZfreeItem (&pw, PR_FALSE);
+
+	return success;
+}
+
+gboolean
+_nm_crypto_verify_pkcs8 (const guint8 *data,
+                         gsize data_len,
+                         gboolean is_encrypted,
+                         const char *password,
+                         GError **error)
+{
+	g_return_val_if_fail (data != NULL, FALSE);
+
+	if (!_nm_crypto_init (error))
+		return FALSE;
+
+	/* NSS apparently doesn't do PKCS#8 natively, but you have to put the
+	 * PKCS#8 key into a PKCS#12 file and import that??  So until we figure
+	 * all that out, we can only assume the password is valid.
+	 */
+	return TRUE;
+}
+
+gboolean
+_nm_crypto_randomize (void *buffer, gsize buffer_len, GError **error)
+{
+	SECStatus s;
+
+	if (!_nm_crypto_init (error))
+		return FALSE;
+
+	s = PK11_GenerateRandom (buffer, buffer_len);
+	if (s != SECSuccess) {
+		g_set_error_literal (error, NM_CRYPTO_ERROR,
+		                     NM_CRYPTO_ERROR_FAILED,
+		                     _("Could not generate random data."));
+		return FALSE;
+	}
+	return TRUE;
+}