gost_crypt.c | 6 ++++++

 gost_lcl.h   | 1 +

 2 files changed, 7 insertions(+)

diff --git a/gost_crypt.c b/gost_crypt.c

index 930d40a..6354b7d 100644

--- a/gost_crypt.c

+++ b/gost_crypt.c

@@ -1190,6 +1190,12 @@ int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)

             c->dgst_size = arg;

             return 1;

         }

+    case EVP_MD_CTRL_SET_IV: {

+        struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);

+        OPENSSL_assert(ptr != NULL);

+        memcpy(gost_imit_ctx->buffer, ptr, arg);

+        return 1;

+    }

     default:

         return 0;

diff --git a/gost_lcl.h b/gost_lcl.h

index 78c6523..da5c892 100644

--- a/gost_lcl.h

+++ b/gost_lcl.h

@@ -253,6 +253,7 @@ void inc_counter(unsigned char *buffer, size_t buf_len);

 # define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)

 # define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)

 # define EVP_MD_CTRL_MAC_LEN (EVP_MD_CTRL_ALG_CTRL+5)

+# define EVP_MD_CTRL_SET_IV  (EVP_MD_CTRL_ALG_CTRL+6)

 /* EVP_PKEY_METHOD key encryption callbacks */

 /* From gost_ec_keyx.c */

 int pkey_gost_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,