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Diffstat (limited to 'arch/x86/include/asm/crypto/glue_helper.h')
-rw-r--r--arch/x86/include/asm/crypto/glue_helper.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/crypto/glue_helper.h b/arch/x86/include/asm/crypto/glue_helper.h
index e2d65b061d27..1eef55596e82 100644
--- a/arch/x86/include/asm/crypto/glue_helper.h
+++ b/arch/x86/include/asm/crypto/glue_helper.h
@@ -14,10 +14,13 @@ typedef void (*common_glue_func_t)(void *ctx, u8 *dst, const u8 *src);
typedef void (*common_glue_cbc_func_t)(void *ctx, u128 *dst, const u128 *src);
typedef void (*common_glue_ctr_func_t)(void *ctx, u128 *dst, const u128 *src,
le128 *iv);
+typedef void (*common_glue_xts_func_t)(void *ctx, u128 *dst, const u128 *src,
+ le128 *iv);
#define GLUE_FUNC_CAST(fn) ((common_glue_func_t)(fn))
#define GLUE_CBC_FUNC_CAST(fn) ((common_glue_cbc_func_t)(fn))
#define GLUE_CTR_FUNC_CAST(fn) ((common_glue_ctr_func_t)(fn))
+#define GLUE_XTS_FUNC_CAST(fn) ((common_glue_xts_func_t)(fn))
struct common_glue_func_entry {
unsigned int num_blocks; /* number of blocks that @fn will process */
@@ -25,6 +28,7 @@ struct common_glue_func_entry {
common_glue_func_t ecb;
common_glue_cbc_func_t cbc;
common_glue_ctr_func_t ctr;
+ common_glue_xts_func_t xts;
} fn_u;
};
@@ -96,6 +100,16 @@ static inline void le128_inc(le128 *i)
i->b = cpu_to_le64(b);
}
+static inline void le128_gf128mul_x_ble(le128 *dst, const le128 *src)
+{
+ u64 a = le64_to_cpu(src->a);
+ u64 b = le64_to_cpu(src->b);
+ u64 _tt = ((s64)a >> 63) & 0x87;
+
+ dst->a = cpu_to_le64((a << 1) ^ (b >> 63));
+ dst->b = cpu_to_le64((b << 1) ^ _tt);
+}
+
extern int glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
@@ -118,4 +132,14 @@ extern int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes);
+extern int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx,
+ struct blkcipher_desc *desc,
+ struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes,
+ common_glue_func_t tweak_fn, void *tweak_ctx,
+ void *crypt_ctx);
+
+extern void glue_xts_crypt_128bit_one(void *ctx, u128 *dst, const u128 *src,
+ le128 *iv, common_glue_func_t fn);
+
#endif /* _CRYPTO_GLUE_HELPER_H */