providers: Add SM4 XTS implementation

Signed-off-by: Xu Yizhou <xuyizhou1@huawei.com>

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19619)

1 files changed, 6 insertions, 0 deletions

diff --git a/include/crypto/modes.h b/include/crypto/modes.h
index d567a0ba84..d03ca83d00 100644
--- a/include/crypto/modes.h
+++ b/include/crypto/modes.h
@@ -155,6 +155,12 @@ struct xts128_context {
     block128_f block1, block2;
 };
 
+/* XTS mode for SM4 algorithm specified by GB/T 17964-2021 */
+int ossl_crypto_xts128gb_encrypt(const XTS128_CONTEXT *ctx,
+                                 const unsigned char iv[16],
+                                 const unsigned char *inp, unsigned char *out,
+                                 size_t len, int enc);
+
 struct ccm128_context {
     union {
         u64 u[2];