Add debug target, remove cast, note possible bug.

[openssl.git] / crypto / pkcs7 / pk7_attr.c

diff --git a/crypto/pkcs7/pk7_attr.c b/crypto/pkcs7/pk7_attr.c
index 6ae264cbf98e605b93a44de954159a492abd1bfc..735c8800e1028f1ab83a59f65e0e9cd2e6d3f169 100644 (file)
--- a/crypto/pkcs7/pk7_attr.c
+++ b/crypto/pkcs7/pk7_attr.c
@@ -1,9 +1,59 @@
 /* pk7_attr.c */
-/* S/MIME code.
- * Copyright (C) 1997-8 Dr S N Henson (shenson@bigfoot.com) 
- * All Rights Reserved. 
- * Redistribution of this code without the authors permission is expressly
- * prohibited.
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2001.
+ */
+/* ====================================================================
+ * Copyright (c) 2001-2004 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
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
  */
 
 #include <stdio.h>
@@ -44,17 +94,19 @@ int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap)
 }
 
 STACK_OF(X509_ALGOR) *PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)
-{
+       {
        ASN1_TYPE *cap;
-       unsigned char *p;
+       const unsigned char *p;
+
        cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);
-       if (!cap) return NULL;
+       if (!cap || (cap->type != V_ASN1_SEQUENCE))
+               return NULL;
        p = cap->value.sequence->data;
        return d2i_ASN1_SET_OF_X509_ALGOR(NULL, &p,
                                          cap->value.sequence->length,
                                          d2i_X509_ALGOR, X509_ALGOR_free,
                                          V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
-}
+       }
 
 /* Basic smime-capabilities OID and optional integer arg */
 int PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)