/*
* Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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 <openssl/asn1t.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/bio.h>
#include <openssl/asn1.h>
#include <openssl/cms.h>
#include "cms_local.h"
IMPLEMENT_ASN1_FUNCTIONS(CMS_ContentInfo)
IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
const ASN1_OBJECT *CMS_get0_type(const CMS_ContentInfo *cms)
{
return cms->contentType;
}
CMS_ContentInfo *cms_Data_create(void)
{
CMS_ContentInfo *cms;
cms = CMS_ContentInfo_new();
if (cms != NULL) {
cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
/* Never detached */
CMS_set_detached(cms, 0);
}
return cms;
}
BIO *cms_content_bio(CMS_ContentInfo *cms)
{
ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
if (!pos)
return NULL;
/* If content detached data goes nowhere: create NULL BIO */
if (!*pos)
return BIO_new(BIO_s_null());
/*
* If content not detached and created return memory BIO
*/
if (!*pos || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
return BIO_new(BIO_s_mem());
/* Else content was read in: return read only BIO for it */
return BIO_new_mem_buf((*pos)->data, (*pos)->length);
}
BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
{
BIO *cmsbio, *cont;
if (icont)
cont = icont;
else
cont = cms_content_bio(cms);
if (!cont) {
CMSerr(CMS_F_CMS_DATAINIT, CMS_R_NO_CONTENT);
return NULL;
}
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_data:
return cont;
case NID_pkcs7_signed:
cmsbio = cms_SignedData_init_bio(cms);
break;
case NID_pkcs7_digest:
cmsbio = cms_DigestedData_init_bio(cms);
break;
#ifdef ZLIB
case NID_id_smime_ct_compressedData:
cmsbio = cms_CompressedData_init_bio(cms);
break;
#endif
case NID_pkcs7_encrypted:
cmsbio = cms_EncryptedData_init_bio(cms);
break;
case NID_pkcs7_enveloped:
cmsbio = cms_EnvelopedData_init_bio(cms);
break;
default:
CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
return NULL;
}
if (cmsbio)
return BIO_push(cmsbio, cont);
if (!icont)
BIO_free(cont);
return NULL;
}
int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
{
ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
if (!pos)
return 0;
/* If embedded content find memory BIO and set content */
if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT)) {
BIO *mbio;
unsigned char *cont;
long contlen;
mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
if (!mbio) {
CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
return 0;
}
contlen = BIO_get_mem_data(mbio, &cont);
/* Set bio as read only so its content can't be clobbered */
BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
BIO_set_mem_eof_return(mbio, 0);
ASN1_STRING_set0(*pos, cont, contlen);
(*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
}
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_data:
case NID_pkcs7_enveloped:
case NID_pkcs7_encrypted:
case NID_id_smime_ct_compressedData:
/* Nothing to do */
return 1;
case NID_pkcs7_signed:
return cms_SignedData_final(cms, cmsbio);
case NID_pkcs7_digest:
return cms_DigestedData_do_final(cms, cmsbio, 0);
default:
CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
return 0;
}
}
/*
* Return an OCTET STRING pointer to content. This allows it to be accessed
* or set later.
*/
ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
{
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_data:
return &cms->d.data;
case NID_pkcs7_signed:
return &cms->d.signedData->encapContentInfo->eContent;
case NID_pkcs7_enveloped:
return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
case NID_pkcs7_digest:
return &cms->d.digestedData->encapContentInfo->eContent;
case NID_pkcs7_encrypted:
return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
case NID_id_smime_ct_authData:
return &cms->d.authenticatedData->encapContentInfo->eContent;
case NID_id_smime_ct_compressedData:
return &cms->d.compressedData->encapContentInfo->eContent;
default:
if (cms->d.other->type == V_ASN1_OCTET_STRING)
return &cms->d.other->value.octet_string;
CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
return NULL;
}
}
/*
* Return an ASN1_OBJECT pointer to content type. This allows it to be
* accessed or set later.
*/
static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
{
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_signed:
return &cms->d.signedData->encapContentInfo->eContentType;
case NID_pkcs7_enveloped:
return &cms->d.envelopedData->encryptedContentInfo->contentType;
case NID_pkcs7_digest:
return &cms->d.digestedData->encapContentInfo->eContentType;
case NID_pkcs7_encrypted:
return &cms->d.encryptedData->encryptedContentInfo->contentType;
case NID_id_smime_ct_authData:
return &cms->d.authenticatedData->encapContentInfo->eContentType;
case NID_id_smime_ct_compressedData:
return &cms->d.compressedData->encapContentInfo->eContentType;
default:
CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE, CMS_R_UNSUPPORTED_CONTENT_TYPE);
return NULL;
}
}
const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
{
ASN1_OBJECT **petype;
petype = cms_get0_econtent_type(cms);
if (petype)
return *petype;
return NULL;
}
int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
{
ASN1_OBJECT **petype, *etype;
petype = cms_get0_econtent_type(cms);
if (!petype)
return 0;
if (!oid)
return 1;
etype = OBJ_dup(oid);
if (!etype)
return 0;
ASN1_OBJECT_free(*petype);
*petype = etype;
return 1;
}
int CMS_is_detached(CMS_ContentInfo *cms)
{
ASN1_OCTET_STRING **pos;
pos = CMS_get0_content(cms);
if (!pos)
return -1;
if (*pos)
return 0;
return 1;
}
int CMS_set_detached(CMS_ContentInfo *cms, int detached)
{
ASN1_OCTET_STRING **pos;
pos = CMS_get0_content(cms);
if (!pos)
return 0;
if (detached) {
ASN1_OCTET_STRING_free(*pos);
*pos = NULL;
return 1;
}
if (*pos == NULL)
*pos = ASN1_OCTET_STRING_new();
if (*pos != NULL) {
/*
* NB: special flag to show content is created and not read in.
*/
(*pos)->flags |= ASN1_STRING_FLAG_CONT;
return 1;
}
CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
return 0;
}
/* Create a digest BIO from an X509_ALGOR structure */
BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
{
BIO *mdbio = NULL;
const ASN1_OBJECT *digestoid;
const EVP_MD *digest;
X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
digest = EVP_get_digestbyobj(digestoid);
if (!digest) {
CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
CMS_R_UNKNOWN_DIGEST_ALGORITHM);
goto err;
}
mdbio = BIO_new(BIO_f_md());
if (mdbio == NULL || !BIO_set_md(mdbio, digest)) {
CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO, CMS_R_MD_BIO_INIT_ERROR);
goto err;
}
return mdbio;
err:
BIO_free(mdbio);
return NULL;
}
/* Locate a message digest content from a BIO chain based on SignerInfo */
int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
X509_ALGOR *mdalg)
{
int nid;
const ASN1_OBJECT *mdoid;
X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
nid = OBJ_obj2nid(mdoid);
/* Look for digest type to match signature */
for (;;) {
EVP_MD_CTX *mtmp;
chain = BIO_find_type(chain, BIO_TYPE_MD);
if (chain == NULL) {
CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
CMS_R_NO_MATCHING_DIGEST);
return 0;
}
BIO_get_md_ctx(chain, &mtmp);
if (EVP_MD_CTX_type(mtmp) == nid
/*
* Workaround for broken implementations that use signature
* algorithm OID instead of digest.
*/
|| EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid)
return EVP_MD_CTX_copy_ex(mctx, mtmp);
chain = BIO_next(chain);
}
}
static STACK_OF(CMS_CertificateChoices)
**cms_get0_certificate_choices(CMS_ContentInfo *cms)
{
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_signed:
return &cms->d.signedData->certificates;
case NID_pkcs7_enveloped:
if (cms->d.envelopedData->originatorInfo == NULL)
return NULL;
return &cms->d.envelopedData->originatorInfo->certificates;
default:
CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
CMS_R_UNSUPPORTED_CONTENT_TYPE);
return NULL;
}
}
CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
{
STACK_OF(CMS_CertificateChoices) **pcerts;
CMS_CertificateChoices *cch;
pcerts = cms_get0_certificate_choices(cms);
if (!pcerts)
return NULL;
if (!*pcerts)
*pcerts = sk_CMS_CertificateChoices_new_null();
if (!*pcerts)
return NULL;
cch = M_ASN1_new_of(CMS_CertificateChoices);
if (!cch)
return NULL;
if (!sk_CMS_CertificateChoices_push(*pcerts, cch)) {
M_ASN1_free_of(cch, CMS_CertificateChoices);
return NULL;
}
return cch;
}
int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
{
CMS_CertificateChoices *cch;
STACK_OF(CMS_CertificateChoices) **pcerts;
int i;
pcerts = cms_get0_certificate_choices(cms);
if (!pcerts)
return 0;
for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
cch = sk_CMS_CertificateChoices_value(*pcerts, i);
if (cch->type == CMS_CERTCHOICE_CERT) {
if (!X509_cmp(cch->d.certificate, cert)) {
CMSerr(CMS_F_CMS_ADD0_CERT,
CMS_R_CERTIFICATE_ALREADY_PRESENT);
return 0;
}
}
}
cch = CMS_add0_CertificateChoices(cms);
if (!cch)
return 0;
cch->type = CMS_CERTCHOICE_CERT;
cch->d.certificate = cert;
return 1;
}
int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
{
int r;
r = CMS_add0_cert(cms, cert);
if (r > 0)
X509_up_ref(cert);
return r;
}
static STACK_OF(CMS_RevocationInfoChoice)
**cms_get0_revocation_choices(CMS_ContentInfo *cms)
{
switch (OBJ_obj2nid(cms->contentType)) {
case NID_pkcs7_signed:
return &cms->d.signedData->crls;
case NID_pkcs7_enveloped:
if (cms->d.envelopedData->originatorInfo == NULL)
return NULL;
return &cms->d.envelopedData->originatorInfo->crls;
default:
CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
CMS_R_UNSUPPORTED_CONTENT_TYPE);
return NULL;
}
}
CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
{
STACK_OF(CMS_RevocationInfoChoice) **pcrls;
CMS_RevocationInfoChoice *rch;
pcrls = cms_get0_revocation_choices(cms);
if (!pcrls)
return NULL;
if (!*pcrls)
*pcrls = sk_CMS_RevocationInfoChoice_new_null();
if (!*pcrls)
return NULL;
rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
if (!rch)
return NULL;
if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch)) {
M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
return NULL;
}
return rch;
}
int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
{
CMS_RevocationInfoChoice *rch;
rch = CMS_add0_RevocationInfoChoice(cms);
if (!rch)
return 0;
rch->type = CMS_REVCHOICE_CRL;
rch->d.crl = crl;
return 1;
}
int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
{
int r;
r = CMS_add0_crl(cms, crl);
if (r > 0)
X509_CRL_up_ref(crl);
return r;
}
STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
{
STACK_OF(X509) *certs = NULL;
CMS_CertificateChoices *cch;
STACK_OF(CMS_CertificateChoices) **pcerts;
int i;
pcerts = cms_get0_certificate_choices(cms);
if (!pcerts)
return NULL;
for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
cch = sk_CMS_CertificateChoices_value(*pcerts, i);
if (cch->type == 0) {
if (!certs) {
certs = sk_X509_new_null();
if (!certs)
return NULL;
}
if (!sk_X509_push(certs, cch->d.certificate)) {
sk_X509_pop_free(certs, X509_free);
return NULL;
}
X509_up_ref(cch->d.certificate);
}
}
return certs;
}
STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
{
STACK_OF(X509_CRL) *crls = NULL;
STACK_OF(CMS_RevocationInfoChoice) **pcrls;
CMS_RevocationInfoChoice *rch;
int i;
pcrls = cms_get0_revocation_choices(cms);
if (!pcrls)
return NULL;
for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++) {
rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
if (rch->type == 0) {
if (!crls) {
crls = sk_X509_CRL_new_null();
if (!crls)
return NULL;
}
if (!sk_X509_CRL_push(crls, rch->d.crl)) {
sk_X509_CRL_pop_free(crls, X509_CRL_free);
return NULL;
}
X509_CRL_up_ref(rch->d.crl);
}
}
return crls;
}
int cms_ias_cert_cmp(CMS_IssuerAndSerialNumber *ias, X509 *cert)
{
int ret;
ret = X509_NAME_cmp(ias->issuer, X509_get_issuer_name(cert));
if (ret)
return ret;
return ASN1_INTEGER_cmp(ias->serialNumber, X509_get_serialNumber(cert));
}
int cms_keyid_cert_cmp(ASN1_OCTET_STRING *keyid, X509 *cert)
{
const ASN1_OCTET_STRING *cert_keyid = X509_get0_subject_key_id(cert);
if (cert_keyid == NULL)
return -1;
return ASN1_OCTET_STRING_cmp(keyid, cert_keyid);
}
int cms_set1_ias(CMS_IssuerAndSerialNumber **pias, X509 *cert)
{
CMS_IssuerAndSerialNumber *ias;
ias = M_ASN1_new_of(CMS_IssuerAndSerialNumber);
if (!ias)
goto err;
if (!X509_NAME_set(&ias->issuer, X509_get_issuer_name(cert)))
goto err;
if (!ASN1_STRING_copy(ias->serialNumber, X509_get_serialNumber(cert)))
goto err;
M_ASN1_free_of(*pias, CMS_IssuerAndSerialNumber);
*pias = ias;
return 1;
err:
M_ASN1_free_of(ias, CMS_IssuerAndSerialNumber);
CMSerr(CMS_F_CMS_SET1_IAS, ERR_R_MALLOC_FAILURE);
return 0;
}
int cms_set1_keyid(ASN1_OCTET_STRING **pkeyid, X509 *cert)
{
ASN1_OCTET_STRING *keyid = NULL;
const ASN1_OCTET_STRING *cert_keyid;
cert_keyid = X509_get0_subject_key_id(cert);
if (cert_keyid == NULL) {
CMSerr(CMS_F_CMS_SET1_KEYID, CMS_R_CERTIFICATE_HAS_NO_KEYID);
return 0;
}
keyid = ASN1_STRING_dup(cert_keyid);
if (!keyid) {
CMSerr(CMS_F_CMS_SET1_KEYID, ERR_R_MALLOC_FAILURE);
return 0;
}
ASN1_OCTET_STRING_free(*pkeyid);
*pkeyid = keyid;
return 1;
}