From 9347ba487c6e72ca2dca04835ff649d88647b568 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Bodo=20M=C3=B6ller?= Date: Tue, 5 Dec 2000 10:30:21 +0000 Subject: [PATCH] Discuss http://www.shoup.net/papers/oaep.ps.Z --- crypto/rsa/rsa_oaep.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/crypto/rsa/rsa_oaep.c b/crypto/rsa/rsa_oaep.c index f735c8d638..8d306d1ead 100644 --- a/crypto/rsa/rsa_oaep.c +++ b/crypto/rsa/rsa_oaep.c @@ -2,7 +2,22 @@ /* 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) */ +/* EME-OAEP as defined in RFC 2437 (PKCS #1 v2.0) */ + +/* See Victor Shoup, "OAEP reconsidered," Nov. 2000, + * + * for problems with the security proof for the + * original OAEP scheme, which EME-OAEP is based on. + * + * Note that for RSA OAEP a security proof in the + * random oracle model *does* exist if 160 < log_2(N/e); + * cf. section 7.2 ("But RSA-OAEP with exponent 3 is + * provably secure") of Shoup's paper. (The slight + * differences between the OAEP definition used by Shoup + * and OAEP as defined in RFC 2437 should not affect + * this result.) + */ + #if !defined(NO_SHA) && !defined(NO_SHA1) #include -- 2.25.1