Make sure strdup() is properly declared.

[oweals/openssl.git] / crypto / rsa / rsa_oaep.c

diff --git a/crypto/rsa/rsa_oaep.c b/crypto/rsa/rsa_oaep.c
index f735c8d638ad5be734900ff9a471aac484ba3a20..e3d81a7a37916c410e8123e49609b1579615ff42 100644 (file)
--- a/crypto/rsa/rsa_oaep.c
+++ b/crypto/rsa/rsa_oaep.c
@@ -2,9 +2,24 @@
 /* Written by Ulf Moeller. This software is distributed on an "AS IS"
    basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. */
 
-/* EME_OAEP as defined in RFC 2437 (PKCS #1 v2.0) */
-
-#if !defined(NO_SHA) && !defined(NO_SHA1)
+/* EME-OAEP as defined in RFC 2437 (PKCS #1 v2.0) */
+
+/* See Victor Shoup, "OAEP reconsidered," Nov. 2000,
+ * <URL: http://www.shoup.net/papers/oaep.ps.Z>
+ * for problems with the security proof for the
+ * original OAEP scheme, which EME-OAEP is based on.
+ * 
+ * A new proof can be found in E. Fujisaki, T. Okamoto,
+ * D. Pointcheval, J. Stern, "RSA-OEAP is Still Alive!",
+ * Dec. 2000, <URL: http://eprint.iacr.org/2000/061/>.
+ * The new proof has stronger requirements for the
+ * underlying permutation: "partial-one-wayness" instead
+ * of one-wayness.  For the RSA function, this is
+ * an equivalent notion.
+ */
+
+
+#if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA1)
 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/bn.h>