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Subject[PATCH v6 5/5] crypto: add flag for unstable encoding
Date
The data-format of zBeWalgo, and some other algorithms is unstable. To
identify such unstable algorithms this patch adds a new flag to the
crypto-api.

Signed-off-by: Benjamin Warnke <4bwarnke@informatik.uni-hamburg.de>
---
crypto/zbewalgo.c | 2 +-
include/linux/crypto.h | 6 ++++++
2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/crypto/zbewalgo.c b/crypto/zbewalgo.c
index 9db0d43be..e57b5ced5 100644
--- a/crypto/zbewalgo.c
+++ b/crypto/zbewalgo.c
@@ -134,7 +134,7 @@ static int zbewalgo_decompress_crypto_unsafe(struct crypto_tfm *tfm,

static struct crypto_alg crypto_alg_zbewalgo = {
.cra_name = "zbewalgo",
- .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS | CRYPTO_ALG_UNSTABLE_ENCODING,
.cra_ctxsize = sizeof(struct zbewalgo_ctx),
.cra_module = THIS_MODULE,
.cra_init = zbewalgo_init,
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 63420dac0..372893569 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -112,6 +112,12 @@
*/
#define CRYPTO_ALG_OPTIONAL_KEY 0x00004000

+/*
+ * Set if the algorithm is new and it is likely that the encoding may
+ * change in near future
+ */
+#define CRYPTO_ALG_UNSTABLE_ENCODING 0x00008000
+
/*
* Transform masks and values (for crt_flags).
*/
--
2.14.1
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