Merge "These changes are the raw update to qemu-2.6."

1 files changed, 287 insertions, 43 deletions

diff --git a/qemu/crypto/cipher-nettle.c b/qemu/crypto/cipher-nettle.c
index b01cb1c85..70909fb7f 100644
--- a/qemu/crypto/cipher-nettle.c
+++ b/qemu/crypto/cipher-nettle.c
@@ -18,58 +18,177 @@
  *
  */
 
+#include "qemu/osdep.h"
+#include "crypto/xts.h"
+
 #include <nettle/nettle-types.h>
 #include <nettle/aes.h>
 #include <nettle/des.h>
 #include <nettle/cbc.h>
+#include <nettle/cast128.h>
+#include <nettle/serpent.h>
+#include <nettle/twofish.h>
 
-#if CONFIG_NETTLE_VERSION_MAJOR < 3
-typedef nettle_crypt_func nettle_cipher_func;
+typedef void (*QCryptoCipherNettleFuncWrapper)(const void *ctx,
+                                               size_t length,
+                                               uint8_t *dst,
+                                               const uint8_t *src);
 
+#if CONFIG_NETTLE_VERSION_MAJOR < 3
+typedef nettle_crypt_func * QCryptoCipherNettleFuncNative;
 typedef void *       cipher_ctx_t;
 typedef unsigned     cipher_length_t;
+
+#define cast5_set_key cast128_set_key
 #else
+typedef nettle_cipher_func * QCryptoCipherNettleFuncNative;
 typedef const void * cipher_ctx_t;
 typedef size_t       cipher_length_t;
 #endif
 
-static nettle_cipher_func aes_encrypt_wrapper;
-static nettle_cipher_func aes_decrypt_wrapper;
-static nettle_cipher_func des_encrypt_wrapper;
-static nettle_cipher_func des_decrypt_wrapper;
+typedef struct QCryptoNettleAES {
+    struct aes_ctx enc;
+    struct aes_ctx dec;
+} QCryptoNettleAES;
+
+static void aes_encrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                               uint8_t *dst, const uint8_t *src)
+{
+    const QCryptoNettleAES *aesctx = ctx;
+    aes_encrypt(&aesctx->enc, length, dst, src);
+}
+
+static void aes_decrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                               uint8_t *dst, const uint8_t *src)
+{
+    const QCryptoNettleAES *aesctx = ctx;
+    aes_decrypt(&aesctx->dec, length, dst, src);
+}
+
+static void des_encrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                               uint8_t *dst, const uint8_t *src)
+{
+    des_encrypt(ctx, length, dst, src);
+}
+
+static void des_decrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                               uint8_t *dst, const uint8_t *src)
+{
+    des_decrypt(ctx, length, dst, src);
+}
+
+static void cast128_encrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    cast128_encrypt(ctx, length, dst, src);
+}
+
+static void cast128_decrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    cast128_decrypt(ctx, length, dst, src);
+}
+
+static void serpent_encrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    serpent_encrypt(ctx, length, dst, src);
+}
 
-static void aes_encrypt_wrapper(cipher_ctx_t ctx, cipher_length_t length,
+static void serpent_decrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    serpent_decrypt(ctx, length, dst, src);
+}
+
+static void twofish_encrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    twofish_encrypt(ctx, length, dst, src);
+}
+
+static void twofish_decrypt_native(cipher_ctx_t ctx, cipher_length_t length,
+                                   uint8_t *dst, const uint8_t *src)
+{
+    twofish_decrypt(ctx, length, dst, src);
+}
+
+static void aes_encrypt_wrapper(const void *ctx, size_t length,
                                 uint8_t *dst, const uint8_t *src)
 {
-    aes_encrypt(ctx, length, dst, src);
+    const QCryptoNettleAES *aesctx = ctx;
+    aes_encrypt(&aesctx->enc, length, dst, src);
 }
 
-static void aes_decrypt_wrapper(cipher_ctx_t ctx, cipher_length_t length,
+static void aes_decrypt_wrapper(const void *ctx, size_t length,
                                 uint8_t *dst, const uint8_t *src)
 {
-    aes_decrypt(ctx, length, dst, src);
+    const QCryptoNettleAES *aesctx = ctx;
+    aes_decrypt(&aesctx->dec, length, dst, src);
 }
 
-static void des_encrypt_wrapper(cipher_ctx_t ctx, cipher_length_t length,
+static void des_encrypt_wrapper(const void *ctx, size_t length,
                                 uint8_t *dst, const uint8_t *src)
 {
     des_encrypt(ctx, length, dst, src);
 }
 
-static void des_decrypt_wrapper(cipher_ctx_t ctx, cipher_length_t length,
+static void des_decrypt_wrapper(const void *ctx, size_t length,
                                 uint8_t *dst, const uint8_t *src)
 {
     des_decrypt(ctx, length, dst, src);
 }
 
+static void cast128_encrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    cast128_encrypt(ctx, length, dst, src);
+}
+
+static void cast128_decrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    cast128_decrypt(ctx, length, dst, src);
+}
+
+static void serpent_encrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    serpent_encrypt(ctx, length, dst, src);
+}
+
+static void serpent_decrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    serpent_decrypt(ctx, length, dst, src);
+}
+
+static void twofish_encrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    twofish_encrypt(ctx, length, dst, src);
+}
+
+static void twofish_decrypt_wrapper(const void *ctx, size_t length,
+                                    uint8_t *dst, const uint8_t *src)
+{
+    twofish_decrypt(ctx, length, dst, src);
+}
+
 typedef struct QCryptoCipherNettle QCryptoCipherNettle;
 struct QCryptoCipherNettle {
-    void *ctx_encrypt;
-    void *ctx_decrypt;
-    nettle_cipher_func *alg_encrypt;
-    nettle_cipher_func *alg_decrypt;
+    /* Primary cipher context for all modes */
+    void *ctx;
+    /* Second cipher context for XTS mode only */
+    void *ctx_tweak;
+    /* Cipher callbacks for both contexts */
+    QCryptoCipherNettleFuncNative alg_encrypt_native;
+    QCryptoCipherNettleFuncNative alg_decrypt_native;
+    QCryptoCipherNettleFuncWrapper alg_encrypt_wrapper;
+    QCryptoCipherNettleFuncWrapper alg_decrypt_wrapper;
+
     uint8_t *iv;
-    size_t niv;
+    size_t blocksize;
 };
 
 bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
@@ -79,6 +198,13 @@ bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
     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_192:
+    case QCRYPTO_CIPHER_ALG_TWOFISH_256:
         return true;
     default:
         return false;
@@ -98,13 +224,14 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
     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 %d", mode);
         return NULL;
     }
 
-    if (!qcrypto_cipher_validate_key_length(alg, nkey, errp)) {
+    if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) {
         return NULL;
     }
 
@@ -116,38 +243,125 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
 
     switch (alg) {
     case QCRYPTO_CIPHER_ALG_DES_RFB:
-        ctx->ctx_encrypt = g_new0(struct des_ctx, 1);
-        ctx->ctx_decrypt = NULL; /* 1 ctx can do both */
+        ctx->ctx = g_new0(struct des_ctx, 1);
         rfbkey = qcrypto_cipher_munge_des_rfb_key(key, nkey);
-        des_set_key(ctx->ctx_encrypt, rfbkey);
+        des_set_key(ctx->ctx, rfbkey);
         g_free(rfbkey);
 
-        ctx->alg_encrypt = des_encrypt_wrapper;
-        ctx->alg_decrypt = des_decrypt_wrapper;
+        ctx->alg_encrypt_native = des_encrypt_native;
+        ctx->alg_decrypt_native = des_decrypt_native;
+        ctx->alg_encrypt_wrapper = des_encrypt_wrapper;
+        ctx->alg_decrypt_wrapper = des_decrypt_wrapper;
 
-        ctx->niv = DES_BLOCK_SIZE;
+        ctx->blocksize = DES_BLOCK_SIZE;
         break;
 
     case QCRYPTO_CIPHER_ALG_AES_128:
     case QCRYPTO_CIPHER_ALG_AES_192:
     case QCRYPTO_CIPHER_ALG_AES_256:
-        ctx->ctx_encrypt = g_new0(struct aes_ctx, 1);
-        ctx->ctx_decrypt = g_new0(struct aes_ctx, 1);
+        ctx->ctx = g_new0(QCryptoNettleAES, 1);
+
+        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+            ctx->ctx_tweak = g_new0(QCryptoNettleAES, 1);
+
+            nkey /= 2;
+            aes_set_encrypt_key(&((QCryptoNettleAES *)ctx->ctx)->enc,
+                                nkey, key);
+            aes_set_decrypt_key(&((QCryptoNettleAES *)ctx->ctx)->dec,
+                                nkey, key);
+
+            aes_set_encrypt_key(&((QCryptoNettleAES *)ctx->ctx_tweak)->enc,
+                                nkey, key + nkey);
+            aes_set_decrypt_key(&((QCryptoNettleAES *)ctx->ctx_tweak)->dec,
+                                nkey, key + nkey);
+        } else {
+            aes_set_encrypt_key(&((QCryptoNettleAES *)ctx->ctx)->enc,
+                                nkey, key);
+            aes_set_decrypt_key(&((QCryptoNettleAES *)ctx->ctx)->dec,
+                                nkey, key);
+        }
+
+        ctx->alg_encrypt_native = aes_encrypt_native;
+        ctx->alg_decrypt_native = aes_decrypt_native;
+        ctx->alg_encrypt_wrapper = aes_encrypt_wrapper;
+        ctx->alg_decrypt_wrapper = aes_decrypt_wrapper;
+
+        ctx->blocksize = AES_BLOCK_SIZE;
+        break;
+
+    case QCRYPTO_CIPHER_ALG_CAST5_128:
+        ctx->ctx = g_new0(struct cast128_ctx, 1);
+
+        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+            ctx->ctx_tweak = g_new0(struct cast128_ctx, 1);
 
-        aes_set_encrypt_key(ctx->ctx_encrypt, nkey, key);
-        aes_set_decrypt_key(ctx->ctx_decrypt, nkey, key);
+            nkey /= 2;
+            cast5_set_key(ctx->ctx, nkey, key);
+            cast5_set_key(ctx->ctx_tweak, nkey, key + nkey);
+        } else {
+            cast5_set_key(ctx->ctx, nkey, key);
+        }
 
-        ctx->alg_encrypt = aes_encrypt_wrapper;
-        ctx->alg_decrypt = aes_decrypt_wrapper;
+        ctx->alg_encrypt_native = cast128_encrypt_native;
+        ctx->alg_decrypt_native = cast128_decrypt_native;
+        ctx->alg_encrypt_wrapper = cast128_encrypt_wrapper;
+        ctx->alg_decrypt_wrapper = cast128_decrypt_wrapper;
 
-        ctx->niv = AES_BLOCK_SIZE;
+        ctx->blocksize = CAST128_BLOCK_SIZE;
         break;
+
+    case QCRYPTO_CIPHER_ALG_SERPENT_128:
+    case QCRYPTO_CIPHER_ALG_SERPENT_192:
+    case QCRYPTO_CIPHER_ALG_SERPENT_256:
+        ctx->ctx = g_new0(struct serpent_ctx, 1);
+
+        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+            ctx->ctx_tweak = g_new0(struct serpent_ctx, 1);
+
+            nkey /= 2;
+            serpent_set_key(ctx->ctx, nkey, key);
+            serpent_set_key(ctx->ctx_tweak, nkey, key + nkey);
+        } else {
+            serpent_set_key(ctx->ctx, nkey, key);
+        }
+
+        ctx->alg_encrypt_native = serpent_encrypt_native;
+        ctx->alg_decrypt_native = serpent_decrypt_native;
+        ctx->alg_encrypt_wrapper = serpent_encrypt_wrapper;
+        ctx->alg_decrypt_wrapper = serpent_decrypt_wrapper;
+
+        ctx->blocksize = SERPENT_BLOCK_SIZE;
+        break;
+
+    case QCRYPTO_CIPHER_ALG_TWOFISH_128:
+    case QCRYPTO_CIPHER_ALG_TWOFISH_192:
+    case QCRYPTO_CIPHER_ALG_TWOFISH_256:
+        ctx->ctx = g_new0(struct twofish_ctx, 1);
+
+        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+            ctx->ctx_tweak = g_new0(struct twofish_ctx, 1);
+
+            nkey /= 2;
+            twofish_set_key(ctx->ctx, nkey, key);
+            twofish_set_key(ctx->ctx_tweak, nkey, key + nkey);
+        } else {
+            twofish_set_key(ctx->ctx, nkey, key);
+        }
+
+        ctx->alg_encrypt_native = twofish_encrypt_native;
+        ctx->alg_decrypt_native = twofish_decrypt_native;
+        ctx->alg_encrypt_wrapper = twofish_encrypt_wrapper;
+        ctx->alg_decrypt_wrapper = twofish_decrypt_wrapper;
+
+        ctx->blocksize = TWOFISH_BLOCK_SIZE;
+        break;
+
     default:
         error_setg(errp, "Unsupported cipher algorithm %d", alg);
         goto error;
     }
 
-    ctx->iv = g_new0(uint8_t, ctx->niv);
+    ctx->iv = g_new0(uint8_t, ctx->blocksize);
     cipher->opaque = ctx;
 
     return cipher;
@@ -169,8 +383,8 @@ void qcrypto_cipher_free(QCryptoCipher *cipher)
 
     ctx = cipher->opaque;
     g_free(ctx->iv);
-    g_free(ctx->ctx_encrypt);
-    g_free(ctx->ctx_decrypt);
+    g_free(ctx->ctx);
+    g_free(ctx->ctx_tweak);
     g_free(ctx);
     g_free(cipher);
 }
@@ -184,16 +398,29 @@ int qcrypto_cipher_encrypt(QCryptoCipher *cipher,
 {
     QCryptoCipherNettle *ctx = cipher->opaque;
 
+    if (len % ctx->blocksize) {
+        error_setg(errp, "Length %zu must be a multiple of block size %zu",
+                   len, ctx->blocksize);
+        return -1;
+    }
+
     switch (cipher->mode) {
     case QCRYPTO_CIPHER_MODE_ECB:
-        ctx->alg_encrypt(ctx->ctx_encrypt, len, out, in);
+        ctx->alg_encrypt_wrapper(ctx->ctx, len, out, in);
         break;
 
     case QCRYPTO_CIPHER_MODE_CBC:
-        cbc_encrypt(ctx->ctx_encrypt, ctx->alg_encrypt,
-                    ctx->niv, ctx->iv,
+        cbc_encrypt(ctx->ctx, ctx->alg_encrypt_native,
+                    ctx->blocksize, ctx->iv,
                     len, out, in);
         break;
+
+    case QCRYPTO_CIPHER_MODE_XTS:
+        xts_encrypt(ctx->ctx, ctx->ctx_tweak,
+                    ctx->alg_encrypt_wrapper, ctx->alg_encrypt_wrapper,
+                    ctx->iv, len, out, in);
+        break;
+
     default:
         error_setg(errp, "Unsupported cipher algorithm %d",
                    cipher->alg);
@@ -211,17 +438,34 @@ int qcrypto_cipher_decrypt(QCryptoCipher *cipher,
 {
     QCryptoCipherNettle *ctx = cipher->opaque;
 
+    if (len % ctx->blocksize) {
+        error_setg(errp, "Length %zu must be a multiple of block size %zu",
+                   len, ctx->blocksize);
+        return -1;
+    }
+
     switch (cipher->mode) {
     case QCRYPTO_CIPHER_MODE_ECB:
-        ctx->alg_decrypt(ctx->ctx_decrypt ? ctx->ctx_decrypt : ctx->ctx_encrypt,
-                         len, out, in);
+        ctx->alg_decrypt_wrapper(ctx->ctx, len, out, in);
         break;
 
     case QCRYPTO_CIPHER_MODE_CBC:
-        cbc_decrypt(ctx->ctx_decrypt ? ctx->ctx_decrypt : ctx->ctx_encrypt,
-                    ctx->alg_decrypt, ctx->niv, ctx->iv,
+        cbc_decrypt(ctx->ctx, ctx->alg_decrypt_native,
+                    ctx->blocksize, ctx->iv,
                     len, out, in);
         break;
+
+    case QCRYPTO_CIPHER_MODE_XTS:
+        if (ctx->blocksize != XTS_BLOCK_SIZE) {
+            error_setg(errp, "Block size must be %d not %zu",
+                       XTS_BLOCK_SIZE, ctx->blocksize);
+            return -1;
+        }
+        xts_decrypt(ctx->ctx, ctx->ctx_tweak,
+                    ctx->alg_encrypt_wrapper, ctx->alg_decrypt_wrapper,
+                    ctx->iv, len, out, in);
+        break;
+
     default:
         error_setg(errp, "Unsupported cipher algorithm %d",
                    cipher->alg);
@@ -235,9 +479,9 @@ int qcrypto_cipher_setiv(QCryptoCipher *cipher,
                          Error **errp)
 {
     QCryptoCipherNettle *ctx = cipher->opaque;
-    if (niv != ctx->niv) {
+    if (niv != ctx->blocksize) {
         error_setg(errp, "Expected IV size %zu not %zu",
-                   ctx->niv, niv);
+                   ctx->blocksize, niv);
         return -1;
     }
     memcpy(ctx->iv, iv, niv);