From 0cd7a0325fa31189d155c2789f1a38cad72d0982 Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Wed, 15 Feb 2012 14:14:01 +0000 Subject: [PATCH] Additional compatibility fix for MDC2 signature format. Update RSA EVP_PKEY_METHOD to use the OCTET STRING form of MDC2 signature: this will make all versions of MDC2 signature equivalent. --- CHANGES | 4 ++++ crypto/rsa/rsa_pmeth.c | 15 ++++++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/CHANGES b/CHANGES index cd3500f844..43961e0aa1 100644 --- a/CHANGES +++ b/CHANGES @@ -4,6 +4,10 @@ Changes between 1.0.0f and 1.0.1 [xx XXX xxxx] + *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET + STRING form instead of a DigestInfo. + [Steve Henson] + *) The format used for MDC2 RSA signatures is inconsistent between EVP and the RSA_sign/RSA_verify functions. This was made more apparent when OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular diff --git a/crypto/rsa/rsa_pmeth.c b/crypto/rsa/rsa_pmeth.c index 2177f3f5c5..5b2ecf56ad 100644 --- a/crypto/rsa/rsa_pmeth.c +++ b/crypto/rsa/rsa_pmeth.c @@ -222,7 +222,20 @@ static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, return ret; } #endif - if (rctx->pad_mode == RSA_X931_PADDING) + + if (EVP_MD_type(rctx->md) == NID_mdc2) + { + unsigned int sltmp; + if (rctx->pad_mode != RSA_PKCS1_PADDING) + return -1; + ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2, + tbs, tbslen, sig, &sltmp, rsa); + + if (ret <= 0) + return ret; + ret = sltmp; + } + else if (rctx->pad_mode == RSA_X931_PADDING) { if (!setup_tbuf(rctx, ctx)) return -1; -- 2.34.1