[S390] aes-s390 key length.

Register aes-s390 algorithms with the actual supported max keylen size

Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index 91636353f6f0..3660ca6a3306 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -119,7 +119,8 @@ static struct crypto_alg aes_alg = {
         .cra_name               =       "aes",
         .cra_driver_name        =       "aes-s390",
         .cra_priority           =       CRYPT_S390_PRIORITY,
-        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
+        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER |
+                                        CRYPTO_ALG_NEED_FALLBACK,
         .cra_blocksize          =       AES_BLOCK_SIZE,
         .cra_ctxsize            =       sizeof(struct s390_aes_ctx),
         .cra_module             =       THIS_MODULE,
@@ -206,7 +207,8 @@ static struct crypto_alg ecb_aes_alg = {
         .cra_name               =       "ecb(aes)",
         .cra_driver_name        =       "ecb-aes-s390",
         .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
-        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
+        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER |
+                                        CRYPTO_ALG_NEED_FALLBACK,
         .cra_blocksize          =       AES_BLOCK_SIZE,
         .cra_ctxsize            =       sizeof(struct s390_aes_ctx),
         .cra_type               =       &crypto_blkcipher_type,
@@ -300,7 +302,8 @@ static struct crypto_alg cbc_aes_alg = {
         .cra_name               =       "cbc(aes)",
         .cra_driver_name        =       "cbc-aes-s390",
         .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
-        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
+        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER |
+                                        CRYPTO_ALG_NEED_FALLBACK,
         .cra_blocksize          =       AES_BLOCK_SIZE,
         .cra_ctxsize            =       sizeof(struct s390_aes_ctx),
         .cra_type               =       &crypto_blkcipher_type,
@@ -333,10 +336,14 @@ static int __init aes_init(void)
                 return -EOPNOTSUPP;
 
         /* z9 109 and z9 BC/EC only support 128 bit key length */
-        if (keylen_flag == AES_KEYLEN_128)
+        if (keylen_flag == AES_KEYLEN_128) {
+                aes_alg.cra_u.cipher.cia_max_keysize = AES_MIN_KEY_SIZE;
+                ecb_aes_alg.cra_u.blkcipher.max_keysize = AES_MIN_KEY_SIZE;
+                cbc_aes_alg.cra_u.blkcipher.max_keysize = AES_MIN_KEY_SIZE;
                 printk(KERN_INFO
                        "aes_s390: hardware acceleration only available for"
                        "128 bit keys\n");
+        }
 
         ret = crypto_register_alg(&aes_alg);
         if (ret)