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

1 files changed, 86 insertions, 0 deletions

diff --git a/lib/libcrypto/rsa/rsa_meth.c b/lib/libcrypto/rsa/rsa_meth.c
new file mode 100644
index 00000000000..0e52799a384
--- /dev/null
+++ b/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;
+}