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openssl/crypto/pkcs7/pk7_lib.c

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/*
* Copyright 1995-2018 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 <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
{
int nid;
long ret;
nid = OBJ_obj2nid(p7->type);
switch (cmd) {
/* NOTE(emilia): does not support detached digested data. */
case PKCS7_OP_SET_DETACHED_SIGNATURE:
if (nid == NID_pkcs7_signed) {
ret = p7->detached = (int)larg;
if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
ASN1_OCTET_STRING *os;
os = p7->d.sign->contents->d.data;
ASN1_OCTET_STRING_free(os);
p7->d.sign->contents->d.data = NULL;
}
} else {
PKCS7err(PKCS7_F_PKCS7_CTRL,
PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
ret = 0;
}
break;
case PKCS7_OP_GET_DETACHED_SIGNATURE:
if (nid == NID_pkcs7_signed) {
if (!p7->d.sign || !p7->d.sign->contents->d.ptr)
ret = 1;
else
ret = 0;
p7->detached = ret;
} else {
PKCS7err(PKCS7_F_PKCS7_CTRL,
PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
ret = 0;
}
break;
default:
PKCS7err(PKCS7_F_PKCS7_CTRL, PKCS7_R_UNKNOWN_OPERATION);
ret = 0;
}
return ret;
}
int PKCS7_content_new(PKCS7 *p7, int type)
{
PKCS7 *ret = NULL;
if ((ret = PKCS7_new()) == NULL)
goto err;
if (!PKCS7_set_type(ret, type))
goto err;
if (!PKCS7_set_content(p7, ret))
goto err;
return 1;
err:
PKCS7_free(ret);
return 0;
}
int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
{
int i;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signed:
PKCS7_free(p7->d.sign->contents);
p7->d.sign->contents = p7_data;
break;
case NID_pkcs7_digest:
PKCS7_free(p7->d.digest->contents);
p7->d.digest->contents = p7_data;
break;
case NID_pkcs7_data:
case NID_pkcs7_enveloped:
case NID_pkcs7_signedAndEnveloped:
case NID_pkcs7_encrypted:
default:
PKCS7err(PKCS7_F_PKCS7_SET_CONTENT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
goto err;
}
return 1;
err:
return 0;
}
int PKCS7_set_type(PKCS7 *p7, int type)
{
ASN1_OBJECT *obj;
/*
* PKCS7_content_free(p7);
*/
obj = OBJ_nid2obj(type); /* will not fail */
switch (type) {
case NID_pkcs7_signed:
p7->type = obj;
if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
goto err;
if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
PKCS7_SIGNED_free(p7->d.sign);
p7->d.sign = NULL;
goto err;
}
break;
case NID_pkcs7_data:
p7->type = obj;
if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
goto err;
break;
case NID_pkcs7_signedAndEnveloped:
p7->type = obj;
if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
== NULL)
goto err;
if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
goto err;
p7->d.signed_and_enveloped->enc_data->content_type
= OBJ_nid2obj(NID_pkcs7_data);
break;
case NID_pkcs7_enveloped:
p7->type = obj;
if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
== NULL)
goto err;
if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
goto err;
p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
break;
case NID_pkcs7_encrypted:
p7->type = obj;
if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
== NULL)
goto err;
if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
goto err;
p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
break;
case NID_pkcs7_digest:
p7->type = obj;
if ((p7->d.digest = PKCS7_DIGEST_new())
== NULL)
goto err;
if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
goto err;
break;
default:
PKCS7err(PKCS7_F_PKCS7_SET_TYPE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
goto err;
}
return 1;
err:
return 0;
}
int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
{
p7->type = OBJ_nid2obj(type);
p7->d.other = other;
return 1;
}
int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
{
int i, j, nid;
X509_ALGOR *alg;
STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
STACK_OF(X509_ALGOR) *md_sk;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signed:
signer_sk = p7->d.sign->signer_info;
md_sk = p7->d.sign->md_algs;
break;
case NID_pkcs7_signedAndEnveloped:
signer_sk = p7->d.signed_and_enveloped->signer_info;
md_sk = p7->d.signed_and_enveloped->md_algs;
break;
default:
PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
nid = OBJ_obj2nid(psi->digest_alg->algorithm);
/* If the digest is not currently listed, add it */
j = 0;
for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
alg = sk_X509_ALGOR_value(md_sk, i);
if (OBJ_obj2nid(alg->algorithm) == nid) {
j = 1;
break;
}
}
if (!j) { /* we need to add another algorithm */
if ((alg = X509_ALGOR_new()) == NULL
|| (alg->parameter = ASN1_TYPE_new()) == NULL) {
X509_ALGOR_free(alg);
PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
return 0;
}
alg->algorithm = OBJ_nid2obj(nid);
alg->parameter->type = V_ASN1_NULL;
if (!sk_X509_ALGOR_push(md_sk, alg)) {
X509_ALGOR_free(alg);
return 0;
}
}
if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
return 0;
return 1;
}
int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
{
int i;
STACK_OF(X509) **sk;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signed:
sk = &(p7->d.sign->cert);
break;
case NID_pkcs7_signedAndEnveloped:
sk = &(p7->d.signed_and_enveloped->cert);
break;
default:
PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
if (*sk == NULL)
*sk = sk_X509_new_null();
if (*sk == NULL) {
PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, ERR_R_MALLOC_FAILURE);
return 0;
}
X509_up_ref(x509);
if (!sk_X509_push(*sk, x509)) {
X509_free(x509);
return 0;
}
return 1;
}
int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
{
int i;
STACK_OF(X509_CRL) **sk;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signed:
sk = &(p7->d.sign->crl);
break;
case NID_pkcs7_signedAndEnveloped:
sk = &(p7->d.signed_and_enveloped->crl);
break;
default:
PKCS7err(PKCS7_F_PKCS7_ADD_CRL, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
if (*sk == NULL)
*sk = sk_X509_CRL_new_null();
if (*sk == NULL) {
PKCS7err(PKCS7_F_PKCS7_ADD_CRL, ERR_R_MALLOC_FAILURE);
return 0;
}
X509_CRL_up_ref(crl);
if (!sk_X509_CRL_push(*sk, crl)) {
X509_CRL_free(crl);
return 0;
}
return 1;
}
int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
const EVP_MD *dgst)
{
int ret;
/* We now need to add another PKCS7_SIGNER_INFO entry */
if (!ASN1_INTEGER_set(p7i->version, 1))
goto err;
if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
X509_get_issuer_name(x509)))
goto err;
/*
* because ASN1_INTEGER_set is used to set a 'long' we will do things the
* ugly way.
*/
ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
if (!(p7i->issuer_and_serial->serial =
ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
goto err;
/* lets keep the pkey around for a while */
EVP_PKEY_up_ref(pkey);
p7i->pkey = pkey;
/* Set the algorithms */
X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
V_ASN1_NULL, NULL);
if (pkey->ameth && pkey->ameth->pkey_ctrl) {
ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
if (ret > 0)
return 1;
if (ret != -2) {
PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
PKCS7_R_SIGNING_CTRL_FAILURE);
return 0;
}
}
PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
err:
return 0;
}
PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
const EVP_MD *dgst)
{
PKCS7_SIGNER_INFO *si = NULL;
if (dgst == NULL) {
int def_nid;
if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
goto err;
dgst = EVP_get_digestbynid(def_nid);
if (dgst == NULL) {
PKCS7err(PKCS7_F_PKCS7_ADD_SIGNATURE, PKCS7_R_NO_DEFAULT_DIGEST);
goto err;
}
}
if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
goto err;
if (!PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst))
goto err;
if (!PKCS7_add_signer(p7, si))
goto err;
return si;
err:
PKCS7_SIGNER_INFO_free(si);
return NULL;
}
int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
{
if (PKCS7_type_is_digest(p7)) {
if ((p7->d.digest->md->parameter = ASN1_TYPE_new()) == NULL) {
PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, ERR_R_MALLOC_FAILURE);
return 0;
}
p7->d.digest->md->parameter->type = V_ASN1_NULL;
p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
return 1;
}
PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, PKCS7_R_WRONG_CONTENT_TYPE);
return 1;
}
STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
{
if (p7 == NULL || p7->d.ptr == NULL)
return NULL;
if (PKCS7_type_is_signed(p7)) {
return p7->d.sign->signer_info;
} else if (PKCS7_type_is_signedAndEnveloped(p7)) {
return p7->d.signed_and_enveloped->signer_info;
} else
return NULL;
}
void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
X509_ALGOR **pdig, X509_ALGOR **psig)
{
if (pk)
*pk = si->pkey;
if (pdig)
*pdig = si->digest_alg;
if (psig)
*psig = si->digest_enc_alg;
}
void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
{
if (penc)
*penc = ri->key_enc_algor;
}
PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
{
PKCS7_RECIP_INFO *ri;
if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
goto err;
if (!PKCS7_RECIP_INFO_set(ri, x509))
goto err;
if (!PKCS7_add_recipient_info(p7, ri))
goto err;
return ri;
err:
PKCS7_RECIP_INFO_free(ri);
return NULL;
}
int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
{
int i;
STACK_OF(PKCS7_RECIP_INFO) *sk;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signedAndEnveloped:
sk = p7->d.signed_and_enveloped->recipientinfo;
break;
case NID_pkcs7_enveloped:
sk = p7->d.enveloped->recipientinfo;
break;
default:
PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,
PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
return 0;
return 1;
}
int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
{
int ret;
EVP_PKEY *pkey = NULL;
if (!ASN1_INTEGER_set(p7i->version, 0))
return 0;
if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
X509_get_issuer_name(x509)))
return 0;
ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
if (!(p7i->issuer_and_serial->serial =
ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
return 0;
pkey = X509_get0_pubkey(x509);
if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl) {
PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
goto err;
}
ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
if (ret == -2) {
PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
goto err;
}
if (ret <= 0) {
PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
PKCS7_R_ENCRYPTION_CTRL_FAILURE);
goto err;
}
X509_up_ref(x509);
p7i->cert = x509;
return 1;
err:
return 0;
}
X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
{
if (PKCS7_type_is_signed(p7))
return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
si->issuer_and_serial->issuer,
si->
issuer_and_serial->serial));
else
return NULL;
}
int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
{
int i;
PKCS7_ENC_CONTENT *ec;
i = OBJ_obj2nid(p7->type);
switch (i) {
case NID_pkcs7_signedAndEnveloped:
ec = p7->d.signed_and_enveloped->enc_data;
break;
case NID_pkcs7_enveloped:
ec = p7->d.enveloped->enc_data;
break;
default:
PKCS7err(PKCS7_F_PKCS7_SET_CIPHER, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
/* Check cipher OID exists and has data in it */
i = EVP_CIPHER_type(cipher);
if (i == NID_undef) {
PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,
PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
return 0;
}
ec->cipher = cipher;
return 1;
}
int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
{
ASN1_OCTET_STRING *os = NULL;
switch (OBJ_obj2nid(p7->type)) {
case NID_pkcs7_data:
os = p7->d.data;
break;
case NID_pkcs7_signedAndEnveloped:
os = p7->d.signed_and_enveloped->enc_data->enc_data;
if (os == NULL) {
os = ASN1_OCTET_STRING_new();
p7->d.signed_and_enveloped->enc_data->enc_data = os;
}
break;
case NID_pkcs7_enveloped:
os = p7->d.enveloped->enc_data->enc_data;
if (os == NULL) {
os = ASN1_OCTET_STRING_new();
p7->d.enveloped->enc_data->enc_data = os;
}
break;
case NID_pkcs7_signed:
os = p7->d.sign->contents->d.data;
break;
default:
os = NULL;
break;
}
if (os == NULL)
return 0;
os->flags |= ASN1_STRING_FLAG_NDEF;
*boundary = &os->data;
return 1;
}
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