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authorEric Biggers <ebiggers@google.com>2018-01-05 22:09:58 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2018-01-12 15:03:42 +0300
commiteb772f37ae8163a89e28a435f6a18742ae06653b (patch)
tree3f0561e7ee5d9944f0f7d077ba1168c7d5dfae32 /include/crypto
parentb62b3db76f73c5a8cc132f78e7174bf57d582182 (diff)
downloadlinux-eb772f37ae8163a89e28a435f6a18742ae06653b.tar.xz
crypto: salsa20 - export generic helpers
Export the Salsa20 constants, transform context, and initialization functions so that they can be reused by the x86 implementation. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
-rw-r--r--include/crypto/salsa20.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/crypto/salsa20.h b/include/crypto/salsa20.h
new file mode 100644
index 000000000000..19ed48aefc86
--- /dev/null
+++ b/include/crypto/salsa20.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Common values for the Salsa20 algorithm
+ */
+
+#ifndef _CRYPTO_SALSA20_H
+#define _CRYPTO_SALSA20_H
+
+#include <linux/types.h>
+
+#define SALSA20_IV_SIZE 8
+#define SALSA20_MIN_KEY_SIZE 16
+#define SALSA20_MAX_KEY_SIZE 32
+#define SALSA20_BLOCK_SIZE 64
+
+struct crypto_skcipher;
+
+struct salsa20_ctx {
+ u32 initial_state[16];
+};
+
+void crypto_salsa20_init(u32 *state, const struct salsa20_ctx *ctx,
+ const u8 *iv);
+int crypto_salsa20_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keysize);
+
+#endif /* _CRYPTO_SALSA20_H */