Provide RSA_meth_{dup,free,new,set_{finish,priv_{dec,enc}}}()

Note that these functions return NULL in out-of-memory situations,
but contrary to OpenSSL's versions they do not set an error.

ok jsing

2 files changed, 96 insertions, 1 deletions

diff --git a/src/lib/libcrypto/rsa/rsa.h b/src/lib/libcrypto/rsa/rsa.h
index 65a643f4c6..23929aafb9 100644
--- a/src/lib/libcrypto/rsa/rsa.h
+++ b/src/lib/libcrypto/rsa/rsa.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa.h,v 1.37 2018/02/20 17:42:32 tb Exp $ */
+/* $OpenBSD: rsa.h,v 1.38 2018/03/17 15:12:56 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -430,6 +430,15 @@ RSA *RSAPrivateKey_dup(RSA *rsa);
  */
 #define RSA_FLAG_CHECKED                        0x0800
 
+RSA_METHOD *RSA_meth_new(const char *name, int flags);
+void RSA_meth_free(RSA_METHOD *meth);
+RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth);
+int RSA_meth_set_priv_enc(RSA_METHOD *meth, int (*priv_enc)(int flen,
+    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
+int RSA_meth_set_priv_dec(RSA_METHOD *meth, int (*priv_dec)(int flen,
+    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
+int RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa));
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
diff --git a/src/lib/libcrypto/rsa/rsa_meth.c b/src/lib/libcrypto/rsa/rsa_meth.c
new file mode 100644
index 0000000000..0e52799a38
--- /dev/null
+++ b/src/lib/libcrypto/rsa/rsa_meth.c
@@ -0,0 +1,86 @@
+/*      $OpenBSD: rsa_meth.c,v 1.1 2018/03/17 15:12:56 tb Exp $ */
+/*
+ * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/rsa.h>
+
+RSA_METHOD *
+RSA_meth_new(const char *name, int flags)
+{
+        RSA_METHOD *meth;
+
+        if ((meth = calloc(1, sizeof(*meth))) == NULL)
+                return NULL;
+        if ((meth->name = strdup(name)) == NULL) {
+                free(meth);
+                return NULL;
+        }
+        meth->flags = flags;
+
+        return meth;
+}
+
+void
+RSA_meth_free(RSA_METHOD *meth)
+{
+        if (meth != NULL) {
+                free((char *)meth->name);
+                free(meth);
+        }
+}
+
+RSA_METHOD *
+RSA_meth_dup(const RSA_METHOD *meth)
+{
+        RSA_METHOD *copy;
+
+        if ((copy = calloc(1, sizeof(*copy))) == NULL)
+                return NULL;
+        memcpy(copy, meth, sizeof(*copy));
+        if ((copy->name = strdup(meth->name)) == NULL) {
+                free(copy);
+                return NULL;
+        }
+
+        return copy;
+}
+
+int
+RSA_meth_set_priv_enc(RSA_METHOD *meth, int (*priv_enc)(int flen,
+    const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
+{
+        meth->rsa_priv_enc = priv_enc;
+        return 1;
+}
+
+int
+RSA_meth_set_priv_dec(RSA_METHOD *meth, int (*priv_dec)(int flen,
+    const unsigned char *from, unsigned char *to, RSA *rsa, int padding))
+{
+        meth->rsa_priv_dec = priv_dec;
+        return 1;
+}
+
+int
+RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa))
+{
+        meth->finish = finish;
+        return 1;
+}