Work around for Netscape PKCS#7 signedData bug.

CHANGES

@@ -4,6 +4,11 @@
 
  Changes between 0.9.5a and 0.9.6  [xx XXX 2000]
 
+  *) Disable the check for content being present when verifying detached
+     signatures in pk7_smime.c. Some versions of Netscape (wrongly)
+     include zero length content when signing messages.
+     [Steve Henson]
+
   *) New BIO_shutdown_wr macro, which invokes the BIO_C_SHUTDOWN_WR
      BIO_ctrl (for BIO pairs).
 

crypto/pkcs7/pk7_smime.c

@@ -172,12 +172,17 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 		PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT);
 		return 0;
 	}
+#if 0
+	/* NB: this test commented out because some versions of Netscape
+	 * illegally include zero length content when signing data.
+	 */
 
 	/* Check for data and content: two sets of data */
 	if(!PKCS7_get_detached(p7) && indata) {
 				PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT);
 		return 0;
 	}
+#endif
 
 	sinfos = PKCS7_get_signer_info(p7);