Set contentType attribute just before signing to allow encapsulated content
authorDr. Stephen Henson <steve@openssl.org>
Sun, 6 Apr 2008 16:29:47 +0000 (16:29 +0000)
committerDr. Stephen Henson <steve@openssl.org>
Sun, 6 Apr 2008 16:29:47 +0000 (16:29 +0000)
type to be set at any time in applications.

crypto/cms/cms_sd.c

index 6f31f63..e862872 100644 (file)
@@ -404,16 +404,17 @@ CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
 
        if (!(flags & CMS_NOATTR))
                {
-               /* Copy content type across */
-               ASN1_OBJECT *ctype =
-                               OBJ_dup(sd->encapContentInfo->eContentType); 
-               if (!ctype)
-                       goto merr;
-               i = CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
-                                               V_ASN1_OBJECT, ctype, -1);
-               ASN1_OBJECT_free(ctype);
-               if (i <= 0)
-                       goto merr;
+               /* Initialialize signed attributes strutucture so other
+                * attributes such as signing time etc are added later
+                * even if we add none here.
+                */
+               if (!si->signedAttrs)
+                       {
+                       si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
+                       if (!si->signedAttrs)
+                               goto merr;
+                       }
+
                if (!(flags & CMS_NOSMIMECAP))
                        {
                        STACK_OF(X509_ALGOR) *smcap = NULL;
@@ -615,7 +616,8 @@ void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
                *psig = si->signatureAlgorithm;
        }
 
-static int cms_SignerInfo_content_sign(CMS_SignerInfo *si, BIO *chain)
+static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
+                                       CMS_SignerInfo *si, BIO *chain)
        {
        EVP_MD_CTX mctx;
        int r = 0;
@@ -635,6 +637,8 @@ static int cms_SignerInfo_content_sign(CMS_SignerInfo *si, BIO *chain)
 
        if (CMS_signed_get_attr_count(si) >= 0)
                {
+               ASN1_OBJECT *ctype =
+                       cms->d.signedData->encapContentInfo->eContentType; 
                unsigned char md[EVP_MAX_MD_SIZE];
                unsigned int mdlen;
                EVP_DigestFinal_ex(&mctx, md, &mdlen);
@@ -642,6 +646,10 @@ static int cms_SignerInfo_content_sign(CMS_SignerInfo *si, BIO *chain)
                                                V_ASN1_OCTET_STRING,
                                                md, mdlen))
                        goto err;
+               /* Copy content type across */
+               if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
+                                       V_ASN1_OBJECT, ctype, -1) <= 0)
+                       goto err;
                if (!CMS_SignerInfo_sign(si))
                        goto err;
                }
@@ -683,7 +691,7 @@ int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
        for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
                {
                si = sk_CMS_SignerInfo_value(sinfos, i);
-               if (!cms_SignerInfo_content_sign(si, chain))
+               if (!cms_SignerInfo_content_sign(cms, si, chain))
                        return 0;
                }
        cms->d.signedData->encapContentInfo->partial = 0;