From 802d2d2b5848df4f0943de2223935057286a4d82 Mon Sep 17 00:00:00 2001
From: tb <tb@openbsd.org>
Date: Wed, 1 Mar 2023 10:57:08 +0000
Subject: [PATCH] libcrypto: import a copy of OpenSSL 1.1's cmeth_lib.c

This is the file as of OpenSSL 1.1.1 commit 82dfb986. Call the file
cipher_method_lib.c since the short names in this directory are hard
enough to read. This is a first step towards providing the poorly
named EVP_CIPHER_meth_* API which is needed by some projects because
of EVP_CIPHER opacity.

ok jsing
---
 lib/libcrypto/evp/cipher_method_lib.c | 151 ++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 lib/libcrypto/evp/cipher_method_lib.c

diff --git a/lib/libcrypto/evp/cipher_method_lib.c b/lib/libcrypto/evp/cipher_method_lib.c
new file mode 100644
index 00000000000..272e48249e4
--- /dev/null
+++ b/lib/libcrypto/evp/cipher_method_lib.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+
+#include <openssl/evp.h>
+#include "crypto/evp.h"
+#include "evp_local.h"
+
+EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)
+{
+    EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
+
+    if (cipher != NULL) {
+        cipher->nid = cipher_type;
+        cipher->block_size = block_size;
+        cipher->key_len = key_len;
+    }
+    return cipher;
+}
+
+EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
+{
+    EVP_CIPHER *to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
+                                         cipher->key_len);
+
+    if (to != NULL)
+        memcpy(to, cipher, sizeof(*to));
+    return to;
+}
+
+void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
+{
+    OPENSSL_free(cipher);
+}
+
+int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
+{
+    cipher->iv_len = iv_len;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
+{
+    cipher->flags = flags;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
+{
+    cipher->ctx_size = ctx_size;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
+                             int (*init) (EVP_CIPHER_CTX *ctx,
+                                          const unsigned char *key,
+                                          const unsigned char *iv,
+                                          int enc))
+{
+    cipher->init = init;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
+                                  int (*do_cipher) (EVP_CIPHER_CTX *ctx,
+                                                    unsigned char *out,
+                                                    const unsigned char *in,
+                                                    size_t inl))
+{
+    cipher->do_cipher = do_cipher;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
+                                int (*cleanup) (EVP_CIPHER_CTX *))
+{
+    cipher->cleanup = cleanup;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
+                                        int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
+                                                                    ASN1_TYPE *))
+{
+    cipher->set_asn1_parameters = set_asn1_parameters;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
+                                        int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
+                                                                    ASN1_TYPE *))
+{
+    cipher->get_asn1_parameters = get_asn1_parameters;
+    return 1;
+}
+
+int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
+                             int (*ctrl) (EVP_CIPHER_CTX *, int type,
+                                          int arg, void *ptr))
+{
+    cipher->ctrl = ctrl;
+    return 1;
+}
+
+
+int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
+                                                          const unsigned char *key,
+                                                          const unsigned char *iv,
+                                                          int enc)
+{
+    return cipher->init;
+}
+int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
+                                                               unsigned char *out,
+                                                               const unsigned char *in,
+                                                               size_t inl)
+{
+    return cipher->do_cipher;
+}
+
+int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
+{
+    return cipher->cleanup;
+}
+
+int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
+                                                                     ASN1_TYPE *)
+{
+    return cipher->set_asn1_parameters;
+}
+
+int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
+                                                               ASN1_TYPE *)
+{
+    return cipher->get_asn1_parameters;
+}
+
+int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
+                                                          int type, int arg,
+                                                          void *ptr)
+{
+    return cipher->ctrl;
+}
+
-- 
2.20.1