Prepare to provide the EVP_MD_meth_* API

This allows implementations to add their own EVP_MD_METHODs.
Only the setters are provided.

This is used by erlang for the otp_test_engine.

ok inoguchi jsing

1 files changed, 109 insertions, 1 deletions

diff --git a/src/lib/libcrypto/evp/evp_lib.c b/src/lib/libcrypto/evp/evp_lib.c
index c96813987f..0e354d6272 100644
--- a/src/lib/libcrypto/evp/evp_lib.c
+++ b/src/lib/libcrypto/evp/evp_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: evp_lib.c,v 1.23 2022/01/09 15:15:25 tb Exp $ */
+/* $OpenBSD: evp_lib.c,v 1.24 2022/01/10 13:42:28 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -371,6 +371,114 @@ EVP_MD_flags(const EVP_MD *md)
         return md->flags;
 }
 
+EVP_MD *
+EVP_MD_meth_new(int md_type, int pkey_type)
+{
+        EVP_MD *md;
+
+        if ((md = calloc(1, sizeof(*md))) == NULL)
+                return NULL;
+
+        md->type = md_type;
+        md->pkey_type = pkey_type;
+
+        return md;
+}
+
+EVP_MD *
+EVP_MD_meth_dup(const EVP_MD *md)
+{
+        EVP_MD *to;
+
+        if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) == NULL)
+                return NULL;
+
+        memcpy(to, md, sizeof(*to));
+
+        return to;
+}
+
+void
+EVP_MD_meth_free(EVP_MD *md)
+{
+        freezero(md, sizeof(*md));
+}
+
+int
+EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
+{
+        md->block_size = blocksize;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_result_size(EVP_MD *md, int result_size)
+{
+        md->md_size = result_size;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
+{
+        md->ctx_size = datasize;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
+{
+        md->flags = flags;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
+{
+        md->init = init;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_update(EVP_MD *md,
+    int (*update)(EVP_MD_CTX *ctx, const void *data, size_t count))
+{
+        md->update = update;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_final(EVP_MD *md,
+    int (*final)(EVP_MD_CTX *ctx, unsigned char *md))
+{
+        md->final = final;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_copy(EVP_MD *md,
+    int (*copy)(EVP_MD_CTX *to, const EVP_MD_CTX *from))
+{
+        md->copy = copy;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_cleanup(EVP_MD *md,
+    int (*cleanup)(EVP_MD_CTX *ctx))
+{
+        md->cleanup = cleanup;
+        return 1;
+}
+
+int
+EVP_MD_meth_set_ctrl(EVP_MD *md,
+    int (*ctrl)(EVP_MD_CTX *ctx, int cmd, int p1, void *p2))
+{
+        md->md_ctrl = ctrl;
+        return 1;
+}
+
 const EVP_MD *
 EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 {