[Qemu-devel] [PATCH for-2.9 1/3] crypto: add standard des support

["Longpeng(Mike)" <longpeng2@huawei.com>]

This patch add standart DES support.

Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
---
 crypto/cipher-gcrypt.c |  3 +++
 crypto/cipher-nettle.c | 13 ++++++++++---
 crypto/cipher.c        |  5 ++++-
 qapi/crypto.json       |  2 +-
 4 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/crypto/cipher-gcrypt.c b/crypto/cipher-gcrypt.c
index c550db9..7ca049c 100644
--- a/crypto/cipher-gcrypt.c
+++ b/crypto/cipher-gcrypt.c
@@ -28,6 +28,7 @@ bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
                              QCryptoCipherMode mode)
 {
     switch (alg) {
+    case QCRYPTO_CIPHER_ALG_DES:
     case QCRYPTO_CIPHER_ALG_DES_RFB:
     case QCRYPTO_CIPHER_ALG_AES_128:
     case QCRYPTO_CIPHER_ALG_AES_192:
@@ -95,6 +96,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
     }
 
     switch (alg) {
+    case QCRYPTO_CIPHER_ALG_DES:
     case QCRYPTO_CIPHER_ALG_DES_RFB:
         gcryalg = GCRY_CIPHER_DES;
         break;
@@ -200,6 +202,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
         case QCRYPTO_CIPHER_ALG_TWOFISH_256:
             ctx->blocksize = 16;
             break;
+        case QCRYPTO_CIPHER_ALG_DES:
         case QCRYPTO_CIPHER_ALG_CAST5_128:
             ctx->blocksize = 8;
             break;
diff --git a/crypto/cipher-nettle.c b/crypto/cipher-nettle.c
index cd094cd..81cc634 100644
--- a/crypto/cipher-nettle.c
+++ b/crypto/cipher-nettle.c
@@ -196,6 +196,7 @@ bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
                              QCryptoCipherMode mode)
 {
     switch (alg) {
+    case QCRYPTO_CIPHER_ALG_DES:
     case QCRYPTO_CIPHER_ALG_DES_RFB:
     case QCRYPTO_CIPHER_ALG_AES_128:
     case QCRYPTO_CIPHER_ALG_AES_192:
@@ -256,11 +257,17 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
     ctx = g_new0(QCryptoCipherNettle, 1);
 
     switch (alg) {
+    case QCRYPTO_CIPHER_ALG_DES:
     case QCRYPTO_CIPHER_ALG_DES_RFB:
         ctx->ctx = g_new0(struct des_ctx, 1);
-        rfbkey = qcrypto_cipher_munge_des_rfb_key(key, nkey);
-        des_set_key(ctx->ctx, rfbkey);
-        g_free(rfbkey);
+
+        if (alg == QCRYPTO_CIPHER_ALG_DES_RFB) {
+            rfbkey = qcrypto_cipher_munge_des_rfb_key(key, nkey);
+            des_set_key(ctx->ctx, rfbkey);
+            g_free(rfbkey);
+        } else {
+            des_set_key(ctx->ctx, key);
+        }
 
         ctx->alg_encrypt_native = des_encrypt_native;
         ctx->alg_decrypt_native = des_decrypt_native;
diff --git a/crypto/cipher.c b/crypto/cipher.c
index a9bca41..00d9682 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -27,6 +27,7 @@ static size_t alg_key_len[QCRYPTO_CIPHER_ALG__MAX] = {
     [QCRYPTO_CIPHER_ALG_AES_128] = 16,
     [QCRYPTO_CIPHER_ALG_AES_192] = 24,
     [QCRYPTO_CIPHER_ALG_AES_256] = 32,
+    [QCRYPTO_CIPHER_ALG_DES] = 8,
     [QCRYPTO_CIPHER_ALG_DES_RFB] = 8,
     [QCRYPTO_CIPHER_ALG_CAST5_128] = 16,
     [QCRYPTO_CIPHER_ALG_SERPENT_128] = 16,
@@ -41,6 +42,7 @@ static size_t alg_block_len[QCRYPTO_CIPHER_ALG__MAX] = {
     [QCRYPTO_CIPHER_ALG_AES_128] = 16,
     [QCRYPTO_CIPHER_ALG_AES_192] = 16,
     [QCRYPTO_CIPHER_ALG_AES_256] = 16,
+    [QCRYPTO_CIPHER_ALG_DES] = 8,
     [QCRYPTO_CIPHER_ALG_DES_RFB] = 8,
     [QCRYPTO_CIPHER_ALG_CAST5_128] = 8,
     [QCRYPTO_CIPHER_ALG_SERPENT_128] = 16,
@@ -107,7 +109,8 @@ qcrypto_cipher_validate_key_length(QCryptoCipherAlgorithm alg,
     }
 
     if (mode == QCRYPTO_CIPHER_MODE_XTS) {
-        if (alg == QCRYPTO_CIPHER_ALG_DES_RFB) {
+        if (alg == QCRYPTO_CIPHER_ALG_DES_RFB
+            || alg == QCRYPTO_CIPHER_ALG_DES) {
             error_setg(errp, "XTS mode not compatible with DES-RFB");
             return false;
         }
diff --git a/qapi/crypto.json b/qapi/crypto.json
index 5c9d7d4..d403ab9 100644
--- a/qapi/crypto.json
+++ b/qapi/crypto.json
@@ -75,7 +75,7 @@
 { 'enum': 'QCryptoCipherAlgorithm',
   'prefix': 'QCRYPTO_CIPHER_ALG',
   'data': ['aes-128', 'aes-192', 'aes-256',
-           'des-rfb',
+           'des-rfb', 'des',
            'cast5-128',
            'serpent-128', 'serpent-192', 'serpent-256',
            'twofish-128', 'twofish-192', 'twofish-256']}
-- 
1.8.3.1