crypto: inside-secure - Added AES-OFB support

This patch adds support for AES in output feedback mode (AES-OFB).

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index 3196cb3..5ad4feb 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -982,6 +982,7 @@ static struct safexcel_alg_template *safexcel_algs[] = {
        &safexcel_alg_ecb_aes,
        &safexcel_alg_cbc_aes,
        &safexcel_alg_cfb_aes,
+       &safexcel_alg_ofb_aes,
        &safexcel_alg_ctr_aes,
        &safexcel_alg_md5,
        &safexcel_alg_sha1,

diff --git a/drivers/crypto/inside-secure/safexcel.h b/drivers/crypto/inside-secure/safexcel.h
index 6f781ed..0eb3445 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel.h
+++ b/drivers/crypto/inside-secure/safexcel.h
@@ -336,6 +336,7 @@ struct safexcel_context_record {
 /* control1 */
 #define CONTEXT_CONTROL_CRYPTO_MODE_ECB                (0 << 0)
 #define CONTEXT_CONTROL_CRYPTO_MODE_CBC                (1 << 0)
+#define CONTEXT_CONTROL_CRYPTO_MODE_OFB                (4 << 0)
 #define CONTEXT_CONTROL_CRYPTO_MODE_CFB                (5 << 0)
 #define CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD   (6 << 0)
 #define CONTEXT_CONTROL_CRYPTO_MODE_XTS                (7 << 0)
@@ -769,6 +770,7 @@ extern struct safexcel_alg_template safexcel_alg_cbc_des3_ede;
 extern struct safexcel_alg_template safexcel_alg_ecb_aes;
 extern struct safexcel_alg_template safexcel_alg_cbc_aes;
 extern struct safexcel_alg_template safexcel_alg_cfb_aes;
+extern struct safexcel_alg_template safexcel_alg_ofb_aes;
 extern struct safexcel_alg_template safexcel_alg_ctr_aes;
 extern struct safexcel_alg_template safexcel_alg_md5;
 extern struct safexcel_alg_template safexcel_alg_sha1;

diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c
index 4e06c61..7a1e785 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel_cipher.c
+++ b/drivers/crypto/inside-secure/safexcel_cipher.c
@@ -1172,6 +1172,42 @@ struct safexcel_alg_template safexcel_alg_cfb_aes = {
        },
 };
 
+static int safexcel_skcipher_aes_ofb_cra_init(struct crypto_tfm *tfm)
+{
+       struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
+
+       safexcel_skcipher_cra_init(tfm);
+       ctx->alg  = SAFEXCEL_AES;
+       ctx->mode = CONTEXT_CONTROL_CRYPTO_MODE_OFB;
+       return 0;
+}
+
+struct safexcel_alg_template safexcel_alg_ofb_aes = {
+       .type = SAFEXCEL_ALG_TYPE_SKCIPHER,
+       .algo_mask = SAFEXCEL_ALG_AES | SAFEXCEL_ALG_AES_XFB,
+       .alg.skcipher = {
+               .setkey = safexcel_skcipher_aes_setkey,
+               .encrypt = safexcel_encrypt,
+               .decrypt = safexcel_decrypt,
+               .min_keysize = AES_MIN_KEY_SIZE,
+               .max_keysize = AES_MAX_KEY_SIZE,
+               .ivsize = AES_BLOCK_SIZE,
+               .base = {
+                       .cra_name = "ofb(aes)",
+                       .cra_driver_name = "safexcel-ofb-aes",
+                       .cra_priority = SAFEXCEL_CRA_PRIORITY,
+                       .cra_flags = CRYPTO_ALG_ASYNC |
+                                    CRYPTO_ALG_KERN_DRIVER_ONLY,
+                       .cra_blocksize = 1,
+                       .cra_ctxsize = sizeof(struct safexcel_cipher_ctx),
+                       .cra_alignmask = 0,
+                       .cra_init = safexcel_skcipher_aes_ofb_cra_init,
+                       .cra_exit = safexcel_skcipher_cra_exit,
+                       .cra_module = THIS_MODULE,
+               },
+       },
+};
+
 static int safexcel_skcipher_aesctr_setkey(struct crypto_skcipher *ctfm,
                                           const u8 *key, unsigned int len)
 {