pk7_attr.c

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/* pk7_attr.c */
/* Written by Dr Stephen N Henson ([email protected]) 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
 *    [email protected].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
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 * 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
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 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <openssl/bio.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/pkcs7.h>
#include <openssl/x509.h>
#include <openssl/err.h>

int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap)
{
    ASN1_STRING *seq;
    if(!(seq = ASN1_STRING_new())) {
        PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);
        return 0;
    }
    seq->length = ASN1_item_i2d((ASN1_VALUE *)cap,&seq->data,
                ASN1_ITEM_rptr(X509_ALGORS));
        return PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,
                            V_ASN1_SEQUENCE, seq);
}

STACK_OF(X509_ALGOR) *PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)
    {
    ASN1_TYPE *cap;
    const unsigned char *p;

    cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);
    if (!cap || (cap->type != V_ASN1_SEQUENCE))
        return NULL;
    p = cap->value.sequence->data;
    return (STACK_OF(X509_ALGOR) *)
        ASN1_item_d2i(NULL, &p, cap->value.sequence->length,
                ASN1_ITEM_rptr(X509_ALGORS));
    }

/* Basic smime-capabilities OID and optional integer arg */
int PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
{
    X509_ALGOR *alg;

    if(!(alg = X509_ALGOR_new())) {
        PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
        return 0;
    }
    ASN1_OBJECT_free(alg->algorithm);
    alg->algorithm = OBJ_nid2obj (nid);
    if (arg > 0) {
        ASN1_INTEGER *nbit;
        if(!(alg->parameter = ASN1_TYPE_new())) {
            PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
            return 0;
        }
        if(!(nbit = ASN1_INTEGER_new())) {
            PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
            return 0;
        }
        if(!ASN1_INTEGER_set (nbit, arg)) {
            PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
            return 0;
        }
        alg->parameter->value.integer = nbit;
        alg->parameter->type = V_ASN1_INTEGER;
    }
    sk_X509_ALGOR_push (sk, alg);
    return 1;
}

int PKCS7_add_attrib_content_type(PKCS7_SIGNER_INFO *si, ASN1_OBJECT *coid)
    {
    if (PKCS7_get_signed_attribute(si, NID_pkcs9_contentType))
        return 0;
    if (!coid)
        coid = OBJ_nid2obj(NID_pkcs7_data);
    return PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
                V_ASN1_OBJECT, coid);
    }

int PKCS7_add0_attrib_signing_time(PKCS7_SIGNER_INFO *si, ASN1_TIME *t)
    {
    if (!t && !(t=X509_gmtime_adj(NULL,0)))
        {
        PKCS7err(PKCS7_F_PKCS7_ADD0_ATTRIB_SIGNING_TIME,
                ERR_R_MALLOC_FAILURE);
        return 0;
        }
    return PKCS7_add_signed_attribute(si, NID_pkcs9_signingTime,
                        V_ASN1_UTCTIME, t);
    }

int PKCS7_add1_attrib_digest(PKCS7_SIGNER_INFO *si,
                const unsigned char *md, int mdlen)
    {
    ASN1_OCTET_STRING *os;
    os = ASN1_OCTET_STRING_new();
    if (!os)
        return 0;
    if (!ASN1_STRING_set(os, md, mdlen)
        || !PKCS7_add_signed_attribute(si, NID_pkcs9_messageDigest,
                        V_ASN1_OCTET_STRING, os))
        {
        ASN1_OCTET_STRING_free(os);
        return 0;
        }
    return 1;
    }