crypto: Rename cipher include files to .c.inc

QEMU standard procedure for included c files is to use *.c.inc.
E.g. there are a different set of checks that are applied.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 532 insertions, 0 deletions

diff --git a/crypto/cipher-builtin.c.inc b/crypto/cipher-builtin.c.inc
new file mode 100644
index 0000000000..6eafd39da0
--- /dev/null
+++ b/crypto/cipher-builtin.c.inc
@@ -0,0 +1,532 @@
+/*
+ * QEMU Crypto cipher built-in 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 2.1 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/aes.h"
+#include "crypto/desrfb.h"
+#include "crypto/xts.h"
+#include "cipherpriv.h"
+
+typedef struct QCryptoCipherBuiltinAESContext QCryptoCipherBuiltinAESContext;
+struct QCryptoCipherBuiltinAESContext {
+    AES_KEY enc;
+    AES_KEY dec;
+};
+typedef struct QCryptoCipherBuiltinAES QCryptoCipherBuiltinAES;
+struct QCryptoCipherBuiltinAES {
+    QCryptoCipherBuiltinAESContext key;
+    QCryptoCipherBuiltinAESContext key_tweak;
+    uint8_t iv[AES_BLOCK_SIZE];
+};
+typedef struct QCryptoCipherBuiltinDESRFB QCryptoCipherBuiltinDESRFB;
+struct QCryptoCipherBuiltinDESRFB {
+    uint8_t *key;
+    size_t nkey;
+};
+
+typedef struct QCryptoCipherBuiltin QCryptoCipherBuiltin;
+struct QCryptoCipherBuiltin {
+    union {
+        QCryptoCipherBuiltinAES aes;
+        QCryptoCipherBuiltinDESRFB desrfb;
+    } state;
+    size_t blocksize;
+    void (*free)(QCryptoCipher *cipher);
+    int (*setiv)(QCryptoCipher *cipher,
+                 const uint8_t *iv, size_t niv,
+                 Error **errp);
+    int (*encrypt)(QCryptoCipher *cipher,
+                   const void *in,
+                   void *out,
+                   size_t len,
+                   Error **errp);
+    int (*decrypt)(QCryptoCipher *cipher,
+                   const void *in,
+                   void *out,
+                   size_t len,
+                   Error **errp);
+};
+
+
+static void qcrypto_cipher_free_aes(QCryptoCipher *cipher)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    g_free(ctxt);
+    cipher->opaque = NULL;
+}
+
+
+static void qcrypto_cipher_aes_ecb_encrypt(const AES_KEY *key,
+                                           const void *in,
+                                           void *out,
+                                           size_t len)
+{
+    const uint8_t *inptr = in;
+    uint8_t *outptr = out;
+    while (len) {
+        if (len > AES_BLOCK_SIZE) {
+            AES_encrypt(inptr, outptr, key);
+            inptr += AES_BLOCK_SIZE;
+            outptr += AES_BLOCK_SIZE;
+            len -= AES_BLOCK_SIZE;
+        } else {
+            uint8_t tmp1[AES_BLOCK_SIZE], tmp2[AES_BLOCK_SIZE];
+            memcpy(tmp1, inptr, len);
+            /* Fill with 0 to avoid valgrind uninitialized reads */
+            memset(tmp1 + len, 0, sizeof(tmp1) - len);
+            AES_encrypt(tmp1, tmp2, key);
+            memcpy(outptr, tmp2, len);
+            len = 0;
+        }
+    }
+}
+
+
+static void qcrypto_cipher_aes_ecb_decrypt(const AES_KEY *key,
+                                           const void *in,
+                                           void *out,
+                                           size_t len)
+{
+    const uint8_t *inptr = in;
+    uint8_t *outptr = out;
+    while (len) {
+        if (len > AES_BLOCK_SIZE) {
+            AES_decrypt(inptr, outptr, key);
+            inptr += AES_BLOCK_SIZE;
+            outptr += AES_BLOCK_SIZE;
+            len -= AES_BLOCK_SIZE;
+        } else {
+            uint8_t tmp1[AES_BLOCK_SIZE], tmp2[AES_BLOCK_SIZE];
+            memcpy(tmp1, inptr, len);
+            /* Fill with 0 to avoid valgrind uninitialized reads */
+            memset(tmp1 + len, 0, sizeof(tmp1) - len);
+            AES_decrypt(tmp1, tmp2, key);
+            memcpy(outptr, tmp2, len);
+            len = 0;
+        }
+    }
+}
+
+
+static void qcrypto_cipher_aes_xts_encrypt(const void *ctx,
+                                           size_t length,
+                                           uint8_t *dst,
+                                           const uint8_t *src)
+{
+    const QCryptoCipherBuiltinAESContext *aesctx = ctx;
+
+    qcrypto_cipher_aes_ecb_encrypt(&aesctx->enc, src, dst, length);
+}
+
+
+static void qcrypto_cipher_aes_xts_decrypt(const void *ctx,
+                                           size_t length,
+                                           uint8_t *dst,
+                                           const uint8_t *src)
+{
+    const QCryptoCipherBuiltinAESContext *aesctx = ctx;
+
+    qcrypto_cipher_aes_ecb_decrypt(&aesctx->dec, src, dst, length);
+}
+
+
+static int qcrypto_cipher_encrypt_aes(QCryptoCipher *cipher,
+                                      const void *in,
+                                      void *out,
+                                      size_t len,
+                                      Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    switch (cipher->mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+        qcrypto_cipher_aes_ecb_encrypt(&ctxt->state.aes.key.enc,
+                                       in, out, len);
+        break;
+    case QCRYPTO_CIPHER_MODE_CBC:
+        AES_cbc_encrypt(in, out, len,
+                        &ctxt->state.aes.key.enc,
+                        ctxt->state.aes.iv, 1);
+        break;
+    case QCRYPTO_CIPHER_MODE_XTS:
+        xts_encrypt(&ctxt->state.aes.key,
+                    &ctxt->state.aes.key_tweak,
+                    qcrypto_cipher_aes_xts_encrypt,
+                    qcrypto_cipher_aes_xts_decrypt,
+                    ctxt->state.aes.iv,
+                    len, out, in);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+
+    return 0;
+}
+
+
+static int qcrypto_cipher_decrypt_aes(QCryptoCipher *cipher,
+                                      const void *in,
+                                      void *out,
+                                      size_t len,
+                                      Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    switch (cipher->mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+        qcrypto_cipher_aes_ecb_decrypt(&ctxt->state.aes.key.dec,
+                                       in, out, len);
+        break;
+    case QCRYPTO_CIPHER_MODE_CBC:
+        AES_cbc_encrypt(in, out, len,
+                        &ctxt->state.aes.key.dec,
+                        ctxt->state.aes.iv, 0);
+        break;
+    case QCRYPTO_CIPHER_MODE_XTS:
+        xts_decrypt(&ctxt->state.aes.key,
+                    &ctxt->state.aes.key_tweak,
+                    qcrypto_cipher_aes_xts_encrypt,
+                    qcrypto_cipher_aes_xts_decrypt,
+                    ctxt->state.aes.iv,
+                    len, out, in);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+
+    return 0;
+}
+
+static int qcrypto_cipher_setiv_aes(QCryptoCipher *cipher,
+                                     const uint8_t *iv, size_t niv,
+                                     Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+    if (niv != AES_BLOCK_SIZE) {
+        error_setg(errp, "IV must be %d bytes not %zu",
+                   AES_BLOCK_SIZE, niv);
+        return -1;
+    }
+
+    memcpy(ctxt->state.aes.iv, iv, AES_BLOCK_SIZE);
+
+    return 0;
+}
+
+
+
+
+static QCryptoCipherBuiltin *
+qcrypto_cipher_init_aes(QCryptoCipherMode mode,
+                        const uint8_t *key, size_t nkey,
+                        Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt;
+
+    if (mode != QCRYPTO_CIPHER_MODE_CBC &&
+        mode != QCRYPTO_CIPHER_MODE_ECB &&
+        mode != QCRYPTO_CIPHER_MODE_XTS) {
+        error_setg(errp, "Unsupported cipher mode %s",
+                   QCryptoCipherMode_str(mode));
+        return NULL;
+    }
+
+    ctxt = g_new0(QCryptoCipherBuiltin, 1);
+
+    if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+        if (AES_set_encrypt_key(key, nkey * 4, &ctxt->state.aes.key.enc) != 0) {
+            error_setg(errp, "Failed to set encryption key");
+            goto error;
+        }
+
+        if (AES_set_decrypt_key(key, nkey * 4, &ctxt->state.aes.key.dec) != 0) {
+            error_setg(errp, "Failed to set decryption key");
+            goto error;
+        }
+
+        if (AES_set_encrypt_key(key + (nkey / 2), nkey * 4,
+                                &ctxt->state.aes.key_tweak.enc) != 0) {
+            error_setg(errp, "Failed to set encryption key");
+            goto error;
+        }
+
+        if (AES_set_decrypt_key(key + (nkey / 2), nkey * 4,
+                                &ctxt->state.aes.key_tweak.dec) != 0) {
+            error_setg(errp, "Failed to set decryption key");
+            goto error;
+        }
+    } else {
+        if (AES_set_encrypt_key(key, nkey * 8, &ctxt->state.aes.key.enc) != 0) {
+            error_setg(errp, "Failed to set encryption key");
+            goto error;
+        }
+
+        if (AES_set_decrypt_key(key, nkey * 8, &ctxt->state.aes.key.dec) != 0) {
+            error_setg(errp, "Failed to set decryption key");
+            goto error;
+        }
+    }
+
+    ctxt->blocksize = AES_BLOCK_SIZE;
+    ctxt->free = qcrypto_cipher_free_aes;
+    ctxt->setiv = qcrypto_cipher_setiv_aes;
+    ctxt->encrypt = qcrypto_cipher_encrypt_aes;
+    ctxt->decrypt = qcrypto_cipher_decrypt_aes;
+
+    return ctxt;
+
+ error:
+    g_free(ctxt);
+    return NULL;
+}
+
+
+static void qcrypto_cipher_free_des_rfb(QCryptoCipher *cipher)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    g_free(ctxt->state.desrfb.key);
+    g_free(ctxt);
+    cipher->opaque = NULL;
+}
+
+
+static int qcrypto_cipher_encrypt_des_rfb(QCryptoCipher *cipher,
+                                          const void *in,
+                                          void *out,
+                                          size_t len,
+                                          Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+    size_t i;
+
+    if (len % 8) {
+        error_setg(errp, "Buffer size must be multiple of 8 not %zu",
+                   len);
+        return -1;
+    }
+
+    deskey(ctxt->state.desrfb.key, EN0);
+
+    for (i = 0; i < len; i += 8) {
+        des((void *)in + i, out + i);
+    }
+
+    return 0;
+}
+
+
+static int qcrypto_cipher_decrypt_des_rfb(QCryptoCipher *cipher,
+                                          const void *in,
+                                          void *out,
+                                          size_t len,
+                                          Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+    size_t i;
+
+    if (len % 8) {
+        error_setg(errp, "Buffer size must be multiple of 8 not %zu",
+                   len);
+        return -1;
+    }
+
+    deskey(ctxt->state.desrfb.key, DE1);
+
+    for (i = 0; i < len; i += 8) {
+        des((void *)in + i, out + i);
+    }
+
+    return 0;
+}
+
+
+static int qcrypto_cipher_setiv_des_rfb(QCryptoCipher *cipher,
+                                        const uint8_t *iv, size_t niv,
+                                        Error **errp)
+{
+    error_setg(errp, "Setting IV is not supported");
+    return -1;
+}
+
+
+static QCryptoCipherBuiltin *
+qcrypto_cipher_init_des_rfb(QCryptoCipherMode mode,
+                            const uint8_t *key, size_t nkey,
+                            Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt;
+
+    if (mode != QCRYPTO_CIPHER_MODE_ECB) {
+        error_setg(errp, "Unsupported cipher mode %s",
+                   QCryptoCipherMode_str(mode));
+        return NULL;
+    }
+
+    ctxt = g_new0(QCryptoCipherBuiltin, 1);
+
+    ctxt->state.desrfb.key = g_new0(uint8_t, nkey);
+    memcpy(ctxt->state.desrfb.key, key, nkey);
+    ctxt->state.desrfb.nkey = nkey;
+
+    ctxt->blocksize = 8;
+    ctxt->free = qcrypto_cipher_free_des_rfb;
+    ctxt->setiv = qcrypto_cipher_setiv_des_rfb;
+    ctxt->encrypt = qcrypto_cipher_encrypt_des_rfb;
+    ctxt->decrypt = qcrypto_cipher_decrypt_des_rfb;
+
+    return ctxt;
+}
+
+
+bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
+                             QCryptoCipherMode mode)
+{
+    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:
+        break;
+    default:
+        return false;
+    }
+
+    switch (mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+    case QCRYPTO_CIPHER_MODE_CBC:
+    case QCRYPTO_CIPHER_MODE_XTS:
+        return true;
+    case QCRYPTO_CIPHER_MODE_CTR:
+        return false;
+    default:
+        return false;
+    }
+}
+
+
+static QCryptoCipherBuiltin *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg,
+                                                    QCryptoCipherMode mode,
+                                                    const uint8_t *key,
+                                                    size_t nkey,
+                                                    Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt;
+
+    switch (mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+    case QCRYPTO_CIPHER_MODE_CBC:
+    case QCRYPTO_CIPHER_MODE_XTS:
+        break;
+    default:
+        error_setg(errp, "Unsupported cipher mode %s",
+                   QCryptoCipherMode_str(mode));
+        return NULL;
+    }
+
+    if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) {
+        return NULL;
+    }
+
+    switch (alg) {
+    case QCRYPTO_CIPHER_ALG_DES_RFB:
+        ctxt = qcrypto_cipher_init_des_rfb(mode, key, nkey, errp);
+        break;
+    case QCRYPTO_CIPHER_ALG_AES_128:
+    case QCRYPTO_CIPHER_ALG_AES_192:
+    case QCRYPTO_CIPHER_ALG_AES_256:
+        ctxt = qcrypto_cipher_init_aes(mode, key, nkey, errp);
+        break;
+    default:
+        error_setg(errp,
+                   "Unsupported cipher algorithm %s",
+                   QCryptoCipherAlgorithm_str(alg));
+        return NULL;
+    }
+
+    return ctxt;
+}
+
+static void
+qcrypto_builtin_cipher_ctx_free(QCryptoCipher *cipher)
+{
+    QCryptoCipherBuiltin *ctxt;
+
+    ctxt = cipher->opaque;
+    ctxt->free(cipher);
+}
+
+
+static int
+qcrypto_builtin_cipher_encrypt(QCryptoCipher *cipher,
+                               const void *in,
+                               void *out,
+                               size_t len,
+                               Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    if (len & (ctxt->blocksize - 1)) {
+        error_setg(errp, "Length %zu must be a multiple of block size %zu",
+                   len, ctxt->blocksize);
+        return -1;
+    }
+
+    return ctxt->encrypt(cipher, in, out, len, errp);
+}
+
+
+static int
+qcrypto_builtin_cipher_decrypt(QCryptoCipher *cipher,
+                               const void *in,
+                               void *out,
+                               size_t len,
+                               Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    if (len & (ctxt->blocksize - 1)) {
+        error_setg(errp, "Length %zu must be a multiple of block size %zu",
+                   len, ctxt->blocksize);
+        return -1;
+    }
+
+    return ctxt->decrypt(cipher, in, out, len, errp);
+}
+
+
+static int
+qcrypto_builtin_cipher_setiv(QCryptoCipher *cipher,
+                             const uint8_t *iv, size_t niv,
+                             Error **errp)
+{
+    QCryptoCipherBuiltin *ctxt = cipher->opaque;
+
+    return ctxt->setiv(cipher, iv, niv, errp);
+}
+
+
+static struct QCryptoCipherDriver qcrypto_cipher_lib_driver = {
+    .cipher_encrypt = qcrypto_builtin_cipher_encrypt,
+    .cipher_decrypt = qcrypto_builtin_cipher_decrypt,
+    .cipher_setiv = qcrypto_builtin_cipher_setiv,
+    .cipher_free = qcrypto_builtin_cipher_ctx_free,
+};