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/*
* Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#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()) == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
return 0;
}
seq->length = ASN1_item_i2d((ASN1_VALUE *)cap, &seq->data,
ASN1_ITEM_rptr(X509_ALGORS));
if (!PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,
V_ASN1_SEQUENCE, seq)) {
ASN1_STRING_free(seq);
return 0;
}
return 1;
}
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 == NULL || (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)
{
ASN1_INTEGER *nbit = NULL;
X509_ALGOR *alg;
if ((alg = X509_ALGOR_new()) == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
return 0;
}
ASN1_OBJECT_free(alg->algorithm);
alg->algorithm = OBJ_nid2obj(nid);
if (arg > 0) {
if ((alg->parameter = ASN1_TYPE_new()) == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
goto err;
}
if ((nbit = ASN1_INTEGER_new()) == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
goto err;
}
if (!ASN1_INTEGER_set(nbit, arg)) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
goto err;
}
alg->parameter->value.integer = nbit;
alg->parameter->type = V_ASN1_INTEGER;
nbit = NULL;
}
if (!sk_X509_ALGOR_push(sk, alg)) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
goto err;
}
return 1;
err:
ASN1_INTEGER_free(nbit);
X509_ALGOR_free(alg);
return 0;
}
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)
{
ASN1_TIME *tmp = NULL;
if (t == NULL && (tmp = t = X509_gmtime_adj(NULL, 0)) == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_X509_LIB);
return 0;
}
if (!PKCS7_add_signed_attribute(si, NID_pkcs9_signingTime,
V_ASN1_UTCTIME, t)) {
ASN1_TIME_free(tmp);
return 0;
}
return 1;
}
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 == NULL)
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;
}
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