Patchwork [v7,5/5] crypto: add flag for unstable encoding

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Submitter Benjamin Warnke
Date April 13, 2018, 3:48 p.m.
Message ID <20180413154840.5901-6-4bwarnke@informatik.uni-hamburg.de>
Download mbox | patch
Permalink /patch/10340289/
State RFC
Delegated to: Herbert Xu
Headers show

Comments

Benjamin Warnke - April 13, 2018, 3:48 p.m.
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(-)

Patch

diff --git a/crypto/zbewalgo.c b/crypto/zbewalgo.c
index 9db0d43b..e57b5ced 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 6bfb1aea..2228dd08 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).
  */