Support for smime-type MIME parameter.

[openssl.git] / crypto / pkcs7 / pk7_mime.c

diff --git a/crypto/pkcs7/pk7_mime.c b/crypto/pkcs7/pk7_mime.c
index 1823418465cf603fa9cc1c16750c3ecb98a55d9b..134746c1864f4da4461cfb271b0b29fc6bea95aa 100644 (file)
--- a/crypto/pkcs7/pk7_mime.c
+++ b/crypto/pkcs7/pk7_mime.c
@@ -3,7 +3,7 @@
  * project.
  */
 /* ====================================================================
- * Copyright (c) 1999-2003 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -110,9 +110,6 @@ static void mime_hdr_free(MIME_HEADER *hdr);
 #define MAX_SMLEN 1024
 #define mime_debug(x) /* x */
 
-
-typedef void (*stkfree)();
-
 /* Base 64 read and write of PKCS#7 structure */
 
 static int B64_write_PKCS7(BIO *bio, PKCS7 *p7)
@@ -153,11 +150,12 @@ int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
 {
        char bound[33], c;
        int i;
-       char *mime_prefix, *mime_eol;
+       char *mime_prefix, *mime_eol, *msg_type=NULL;
        if (flags & PKCS7_NOOLDMIMETYPE)
                mime_prefix = "application/pkcs7-";
        else
                mime_prefix = "application/x-pkcs7-";
+
        if (flags & PKCS7_CRLFEOL)
                mime_eol = "\r\n";
        else
@@ -199,11 +197,30 @@ int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
                                                        mime_eol, mime_eol);
                return 1;
        }
+
+       /* Determine smime-type header */
+
+       if (PKCS7_type_is_enveloped(p7))
+               msg_type = "enveloped-data";
+       else if (PKCS7_type_is_signed(p7))
+               {
+               /* If we have any signers it is signed-data othewise 
+                * certs-only.
+                */
+               STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+               sinfos = PKCS7_get_signer_info(p7);
+               if (sk_PKCS7_SIGNER_INFO_num(sinfos) > 0)
+                       msg_type = "signed-data";
+               else
+                       msg_type = "certs-only";
+               }
        /* MIME headers */
        BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
        BIO_printf(bio, "Content-Disposition: attachment;");
        BIO_printf(bio, " filename=\"smime.p7m\"%s", mime_eol);
        BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
+       if (msg_type)
+               BIO_printf(bio, " smime-type=%s;", msg_type);
        BIO_printf(bio, " name=\"smime.p7m\"%s", mime_eol);
        BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
                                                mime_eol, mime_eol);
@@ -239,14 +256,13 @@ static int pkcs7_output_data(BIO *out, BIO *data, PKCS7 *p7, int flags)
        /* Finalize signatures */
        PKCS7_dataFinal(p7, p7bio);
 
-       /* Now remove any digests from output BIO */
+       /* Now remove any digests prepended to the BIO */
 
-       while (1)
+       while (p7bio != out)
                {
                tmpbio = BIO_pop(p7bio);
-               if (tmpbio == out)
-                       break;
-               BIO_free(tmpbio);
+               BIO_free(p7bio);
+               p7bio = tmpbio;
                }
 
        return 1;