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-rw-r--r--qemu/crypto/cipher-gcrypt.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/qemu/crypto/cipher-gcrypt.c b/qemu/crypto/cipher-gcrypt.c
deleted file mode 100644
index ede2f70df..000000000
--- a/qemu/crypto/cipher-gcrypt.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*
- * QEMU Crypto cipher libgcrypt algorithms
- *
- * Copyright (c) 2015 Red Hat, Inc.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "qemu/osdep.h"
-#include "crypto/xts.h"
-
-#include <gcrypt.h>
-
-
-bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
-{
- switch (alg) {
- case QCRYPTO_CIPHER_ALG_DES_RFB:
- case QCRYPTO_CIPHER_ALG_AES_128:
- case QCRYPTO_CIPHER_ALG_AES_192:
- case QCRYPTO_CIPHER_ALG_AES_256:
- case QCRYPTO_CIPHER_ALG_CAST5_128:
- case QCRYPTO_CIPHER_ALG_SERPENT_128:
- case QCRYPTO_CIPHER_ALG_SERPENT_192:
- case QCRYPTO_CIPHER_ALG_SERPENT_256:
- case QCRYPTO_CIPHER_ALG_TWOFISH_128:
- case QCRYPTO_CIPHER_ALG_TWOFISH_256:
- return true;
- default:
- return false;
- }
-}
-
-typedef struct QCryptoCipherGcrypt QCryptoCipherGcrypt;
-struct QCryptoCipherGcrypt {
- gcry_cipher_hd_t handle;
- gcry_cipher_hd_t tweakhandle;
- size_t blocksize;
- uint8_t *iv;
-};
-
-QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
- QCryptoCipherMode mode,
- const uint8_t *key, size_t nkey,
- Error **errp)
-{
- QCryptoCipher *cipher;
- QCryptoCipherGcrypt *ctx;
- gcry_error_t err;
- int gcryalg, gcrymode;
-
- switch (mode) {
- case QCRYPTO_CIPHER_MODE_ECB:
- case QCRYPTO_CIPHER_MODE_XTS:
- gcrymode = GCRY_CIPHER_MODE_ECB;
- break;
- case QCRYPTO_CIPHER_MODE_CBC:
- gcrymode = GCRY_CIPHER_MODE_CBC;
- break;
- default:
- error_setg(errp, "Unsupported cipher mode %d", mode);
- return NULL;
- }
-
- if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) {
- return NULL;
- }
-
- switch (alg) {
- case QCRYPTO_CIPHER_ALG_DES_RFB:
- gcryalg = GCRY_CIPHER_DES;
- break;
-
- case QCRYPTO_CIPHER_ALG_AES_128:
- gcryalg = GCRY_CIPHER_AES128;
- break;
-
- case QCRYPTO_CIPHER_ALG_AES_192:
- gcryalg = GCRY_CIPHER_AES192;
- break;
-
- case QCRYPTO_CIPHER_ALG_AES_256:
- gcryalg = GCRY_CIPHER_AES256;
- break;
-
- case QCRYPTO_CIPHER_ALG_CAST5_128:
- gcryalg = GCRY_CIPHER_CAST5;
- break;
-
- case QCRYPTO_CIPHER_ALG_SERPENT_128:
- gcryalg = GCRY_CIPHER_SERPENT128;
- break;
-
- case QCRYPTO_CIPHER_ALG_SERPENT_192:
- gcryalg = GCRY_CIPHER_SERPENT192;
- break;
-
- case QCRYPTO_CIPHER_ALG_SERPENT_256:
- gcryalg = GCRY_CIPHER_SERPENT256;
- break;
-
- case QCRYPTO_CIPHER_ALG_TWOFISH_128:
- gcryalg = GCRY_CIPHER_TWOFISH128;
- break;
-
- case QCRYPTO_CIPHER_ALG_TWOFISH_256:
- gcryalg = GCRY_CIPHER_TWOFISH;
- break;
-
- default:
- error_setg(errp, "Unsupported cipher algorithm %d", alg);
- return NULL;
- }
-
- cipher = g_new0(QCryptoCipher, 1);
- cipher->alg = alg;
- cipher->mode = mode;
-
- ctx = g_new0(QCryptoCipherGcrypt, 1);
-
- err = gcry_cipher_open(&ctx->handle, gcryalg, gcrymode, 0);
- if (err != 0) {
- error_setg(errp, "Cannot initialize cipher: %s",
- gcry_strerror(err));
- goto error;
- }
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- err = gcry_cipher_open(&ctx->tweakhandle, gcryalg, gcrymode, 0);
- if (err != 0) {
- error_setg(errp, "Cannot initialize cipher: %s",
- gcry_strerror(err));
- goto error;
- }
- }
-
- if (cipher->alg == QCRYPTO_CIPHER_ALG_DES_RFB) {
- /* We're using standard DES cipher from gcrypt, so we need
- * to munge the key so that the results are the same as the
- * bizarre RFB variant of DES :-)
- */
- uint8_t *rfbkey = qcrypto_cipher_munge_des_rfb_key(key, nkey);
- err = gcry_cipher_setkey(ctx->handle, rfbkey, nkey);
- g_free(rfbkey);
- ctx->blocksize = 8;
- } else {
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- nkey /= 2;
- err = gcry_cipher_setkey(ctx->handle, key, nkey);
- if (err != 0) {
- error_setg(errp, "Cannot set key: %s",
- gcry_strerror(err));
- goto error;
- }
- err = gcry_cipher_setkey(ctx->tweakhandle, key + nkey, nkey);
- } else {
- err = gcry_cipher_setkey(ctx->handle, key, nkey);
- }
- if (err != 0) {
- error_setg(errp, "Cannot set key: %s",
- gcry_strerror(err));
- goto error;
- }
- switch (cipher->alg) {
- case QCRYPTO_CIPHER_ALG_AES_128:
- case QCRYPTO_CIPHER_ALG_AES_192:
- case QCRYPTO_CIPHER_ALG_AES_256:
- case QCRYPTO_CIPHER_ALG_SERPENT_128:
- case QCRYPTO_CIPHER_ALG_SERPENT_192:
- case QCRYPTO_CIPHER_ALG_SERPENT_256:
- case QCRYPTO_CIPHER_ALG_TWOFISH_128:
- case QCRYPTO_CIPHER_ALG_TWOFISH_256:
- ctx->blocksize = 16;
- break;
- case QCRYPTO_CIPHER_ALG_CAST5_128:
- ctx->blocksize = 8;
- break;
- default:
- g_assert_not_reached();
- }
- }
-
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- ctx->iv = g_new0(uint8_t, ctx->blocksize);
- }
-
- cipher->opaque = ctx;
- return cipher;
-
- error:
- gcry_cipher_close(ctx->handle);
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- gcry_cipher_close(ctx->tweakhandle);
- }
- g_free(ctx);
- g_free(cipher);
- return NULL;
-}
-
-
-void qcrypto_cipher_free(QCryptoCipher *cipher)
-{
- QCryptoCipherGcrypt *ctx;
- if (!cipher) {
- return;
- }
- ctx = cipher->opaque;
- gcry_cipher_close(ctx->handle);
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- gcry_cipher_close(ctx->tweakhandle);
- }
- g_free(ctx->iv);
- g_free(ctx);
- g_free(cipher);
-}
-
-
-static void qcrypto_gcrypt_xts_encrypt(const void *ctx,
- size_t length,
- uint8_t *dst,
- const uint8_t *src)
-{
- gcry_error_t err;
- err = gcry_cipher_encrypt((gcry_cipher_hd_t)ctx, dst, length, src, length);
- g_assert(err == 0);
-}
-
-static void qcrypto_gcrypt_xts_decrypt(const void *ctx,
- size_t length,
- uint8_t *dst,
- const uint8_t *src)
-{
- gcry_error_t err;
- err = gcry_cipher_decrypt((gcry_cipher_hd_t)ctx, dst, length, src, length);
- g_assert(err == 0);
-}
-
-int qcrypto_cipher_encrypt(QCryptoCipher *cipher,
- const void *in,
- void *out,
- size_t len,
- Error **errp)
-{
- QCryptoCipherGcrypt *ctx = cipher->opaque;
- gcry_error_t err;
-
- if (len % ctx->blocksize) {
- error_setg(errp, "Length %zu must be a multiple of block size %zu",
- len, ctx->blocksize);
- return -1;
- }
-
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- xts_encrypt(ctx->handle, ctx->tweakhandle,
- qcrypto_gcrypt_xts_encrypt,
- qcrypto_gcrypt_xts_decrypt,
- ctx->iv, len, out, in);
- } else {
- err = gcry_cipher_encrypt(ctx->handle,
- out, len,
- in, len);
- if (err != 0) {
- error_setg(errp, "Cannot encrypt data: %s",
- gcry_strerror(err));
- return -1;
- }
- }
-
- return 0;
-}
-
-
-int qcrypto_cipher_decrypt(QCryptoCipher *cipher,
- const void *in,
- void *out,
- size_t len,
- Error **errp)
-{
- QCryptoCipherGcrypt *ctx = cipher->opaque;
- gcry_error_t err;
-
- if (len % ctx->blocksize) {
- error_setg(errp, "Length %zu must be a multiple of block size %zu",
- len, ctx->blocksize);
- return -1;
- }
-
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
- xts_decrypt(ctx->handle, ctx->tweakhandle,
- qcrypto_gcrypt_xts_encrypt,
- qcrypto_gcrypt_xts_decrypt,
- ctx->iv, len, out, in);
- } else {
- err = gcry_cipher_decrypt(ctx->handle,
- out, len,
- in, len);
- if (err != 0) {
- error_setg(errp, "Cannot decrypt data: %s",
- gcry_strerror(err));
- return -1;
- }
- }
-
- return 0;
-}
-
-int qcrypto_cipher_setiv(QCryptoCipher *cipher,
- const uint8_t *iv, size_t niv,
- Error **errp)
-{
- QCryptoCipherGcrypt *ctx = cipher->opaque;
- gcry_error_t err;
-
- if (niv != ctx->blocksize) {
- error_setg(errp, "Expected IV size %zu not %zu",
- ctx->blocksize, niv);
- return -1;
- }
-
- if (ctx->iv) {
- memcpy(ctx->iv, iv, niv);
- } else {
- gcry_cipher_reset(ctx->handle);
- err = gcry_cipher_setiv(ctx->handle, iv, niv);
- if (err != 0) {
- error_setg(errp, "Cannot set IV: %s",
- gcry_strerror(err));
- return -1;
- }
- }
-
- return 0;
-}