Workaround for some CMS signature formats.

Some CMS SignedData structure use a signature algorithm OID such
as SHA1WithRSA instead of the RSA algorithm OID. Workaround this
case by tolerating the signature if we recognise the OID.

diff --git a/crypto/rsa/rsa_ameth.c b/crypto/rsa/rsa_ameth.c
index db926b0e4260a8f67959c4502c37dd7002bf11ae..929193b4fa518ae5268d413dffbb25a183fa4c91 100644 (file)
--- a/crypto/rsa/rsa_ameth.c
+++ b/crypto/rsa/rsa_ameth.c
@@ -700,7 +700,7 @@ static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
 
 static int rsa_cms_verify(CMS_SignerInfo *si)
        {
-       int nid;
+       int nid, nid2;
        X509_ALGOR *alg;
        EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
        CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
@@ -709,6 +709,12 @@ static int rsa_cms_verify(CMS_SignerInfo *si)
                return 1;
        if (nid == NID_rsassaPss)
                return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
+       /* Workaround for some implementation that use a signature OID */
+       if (OBJ_find_sigid_algs(nid, NULL, &nid2))
+               {
+               if (nid2 == NID_rsaEncryption)
+                       return 1;
+               }
        return 0;
        }