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openssl/crypto/pkcs7/pk7_lib.c
Richard Levitte e077455e9e Stop raising ERR_R_MALLOC_FAILURE in most places 
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and
at least handle the file name and line number they are called from,
there's no need to report ERR_R_MALLOC_FAILURE where they are called
directly, or when SSLfatal() and RLAYERfatal() is used, the reason
`ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`.

There were a number of places where `ERR_R_MALLOC_FAILURE` was reported
even though it was a function from a different sub-system that was
called.  Those places are changed to report ERR_R_{lib}_LIB, where
{lib} is the name of that sub-system.
Some of them are tricky to get right, as we have a lot of functions
that belong in the ASN1 sub-system, and all the `sk_` calls or from
the CRYPTO sub-system.

Some extra adaptation was necessary where there were custom OPENSSL_malloc()
wrappers, and some bugs are fixed alongside these changes.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19301)
2022-10-05 14:02:03 +02:00

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/*
* Copyright 1995-2022 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 "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/pkcs7.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
#include "crypto/x509.h" /* for sk_X509_add1_cert() */
#include "pk7_local.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 {
ERR_raise(ERR_LIB_PKCS7,
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 == NULL || p7->d.sign->contents->d.ptr == NULL)
ret = 1;
else
ret = 0;
p7->detached = ret;
} else {
ERR_raise(ERR_LIB_PKCS7,
PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
ret = 0;
}
break;
default:
ERR_raise(ERR_LIB_PKCS7, 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:
ERR_raise(ERR_LIB_PKCS7, 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:
ERR_raise(ERR_LIB_PKCS7, 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;
ASN1_OBJECT *obj;
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:
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
obj = 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_cmp(obj, alg->algorithm) == 0) {
j = 1;
break;
}
}
if (!j) { /* we need to add another algorithm */
int nid;
if ((alg = X509_ALGOR_new()) == NULL
|| (alg->parameter = ASN1_TYPE_new()) == NULL) {
X509_ALGOR_free(alg);
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
return 0;
}
/*
* If there is a constant copy of the ASN1 OBJECT in libcrypto, then
* use that. Otherwise, use a dynamically duplicated copy
*/
if ((nid = OBJ_obj2nid(obj)) != NID_undef)
alg->algorithm = OBJ_nid2obj(nid);
else
alg->algorithm = OBJ_dup(obj);
alg->parameter->type = V_ASN1_NULL;
if (alg->algorithm == NULL || !sk_X509_ALGOR_push(md_sk, alg)) {
X509_ALGOR_free(alg);
return 0;
}
}
psi->ctx = ossl_pkcs7_get0_ctx(p7);
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:
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
return ossl_x509_add_cert_new(sk, x509, X509_ADD_FLAG_UP_REF);
}
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:
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
if (*sk == NULL)
*sk = sk_X509_CRL_new_null();
if (*sk == NULL) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
return 0;
}
X509_CRL_up_ref(crl);
if (!sk_X509_CRL_push(*sk, crl)) {
X509_CRL_free(crl);
return 0;
}
return 1;
}
static int pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO *si,
int verify)
{
if (!verify) {
int snid, hnid;
X509_ALGOR *alg1, *alg2;
EVP_PKEY *pkey = si->pkey;
PKCS7_SIGNER_INFO_get0_algs(si, NULL, &alg1, &alg2);
if (alg1 == NULL || alg1->algorithm == NULL)
return -1;
hnid = OBJ_obj2nid(alg1->algorithm);
if (hnid == NID_undef)
return -1;
if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_get_id(pkey)))
return -1;
return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
}
return 1;
}
static int pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO *si, int verify)
{
if (!verify) {
X509_ALGOR *alg = NULL;
PKCS7_SIGNER_INFO_get0_algs(si, NULL, NULL, &alg);
if (alg != NULL)
return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
V_ASN1_NULL, NULL);
}
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))
return 0;
if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
X509_get_issuer_name(x509)))
return 0;
/*
* 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_get0_serialNumber(x509))))
return 0;
/* lets keep the pkey around for a while */
EVP_PKEY_up_ref(pkey);
p7i->pkey = pkey;
/* Set the algorithms */
if (!X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_get_type(dgst)),
V_ASN1_NULL, NULL))
return 0;
if (EVP_PKEY_is_a(pkey, "EC") || EVP_PKEY_is_a(pkey, "DSA"))
return pkcs7_ecdsa_or_dsa_sign_verify_setup(p7i, 0);
if (EVP_PKEY_is_a(pkey, "RSA"))
return pkcs7_rsa_sign_verify_setup(p7i, 0);
if (pkey->ameth != NULL && pkey->ameth->pkey_ctrl != NULL) {
ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
if (ret > 0)
return 1;
if (ret != -2) {
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_CTRL_FAILURE);
return 0;
}
}
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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) {
ERR_raise(ERR_LIB_PKCS7, 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) <= 0)
goto err;
if (!PKCS7_add_signer(p7, si))
goto err;
return si;
err:
PKCS7_SIGNER_INFO_free(si);
return NULL;
}
static STACK_OF(X509) *pkcs7_get_signer_certs(const PKCS7 *p7)
{
if (PKCS7_type_is_signed(p7))
return p7->d.sign->cert;
if (PKCS7_type_is_signedAndEnveloped(p7))
return p7->d.signed_and_enveloped->cert;
return NULL;
}
static STACK_OF(PKCS7_RECIP_INFO) *pkcs7_get_recipient_info(const PKCS7 *p7)
{
if (PKCS7_type_is_signedAndEnveloped(p7))
return p7->d.signed_and_enveloped->recipientinfo;
if (PKCS7_type_is_enveloped(p7))
return p7->d.enveloped->recipientinfo;
return NULL;
}
/*
* Set up the library context into any loaded structure that needs it.
* i.e loaded X509 objects.
*/
void ossl_pkcs7_resolve_libctx(PKCS7 *p7)
{
int i;
const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7);
OSSL_LIB_CTX *libctx = ossl_pkcs7_ctx_get0_libctx(ctx);
const char *propq = ossl_pkcs7_ctx_get0_propq(ctx);
STACK_OF(PKCS7_RECIP_INFO) *rinfos = pkcs7_get_recipient_info(p7);
STACK_OF(PKCS7_SIGNER_INFO) *sinfos = PKCS7_get_signer_info(p7);
STACK_OF(X509) *certs = pkcs7_get_signer_certs(p7);
if (ctx == NULL)
return;
for (i = 0; i < sk_X509_num(certs); i++)
ossl_x509_set0_libctx(sk_X509_value(certs, i), libctx, propq);
for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rinfos); i++) {
PKCS7_RECIP_INFO *ri = sk_PKCS7_RECIP_INFO_value(rinfos, i);
ossl_x509_set0_libctx(ri->cert, libctx, propq);
}
for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
if (si != NULL)
si->ctx = ctx;
}
}
const PKCS7_CTX *ossl_pkcs7_get0_ctx(const PKCS7 *p7)
{
return p7 != NULL ? &p7->ctx : NULL;
}
void ossl_pkcs7_set0_libctx(PKCS7 *p7, OSSL_LIB_CTX *ctx)
{
p7->ctx.libctx = ctx;
}
int ossl_pkcs7_set1_propq(PKCS7 *p7, const char *propq)
{
if (p7->ctx.propq != NULL) {
OPENSSL_free(p7->ctx.propq);
p7->ctx.propq = NULL;
}
if (propq != NULL) {
p7->ctx.propq = OPENSSL_strdup(propq);
if (p7->ctx.propq == NULL)
return 0;
}
return 1;
}
int ossl_pkcs7_ctx_propagate(const PKCS7 *from, PKCS7 *to)
{
ossl_pkcs7_set0_libctx(to, from->ctx.libctx);
if (!ossl_pkcs7_set1_propq(to, from->ctx.propq))
return 0;
ossl_pkcs7_resolve_libctx(to);
return 1;
}
OSSL_LIB_CTX *ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX *ctx)
{
return ctx != NULL ? ctx->libctx : NULL;
}
const char *ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX *ctx)
{
return ctx != NULL ? ctx->propq : 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) {
ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
return 0;
}
p7->d.digest->md->parameter->type = V_ASN1_NULL;
p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
return 1;
}
ERR_raise(ERR_LIB_PKCS7, 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) <= 0)
goto err;
if (!PKCS7_add_recipient_info(p7, ri))
goto err;
ri->ctx = ossl_pkcs7_get0_ctx(p7);
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:
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
return 0;
return 1;
}
static int pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO *ri, int decrypt)
{
X509_ALGOR *alg = NULL;
if (!decrypt) {
PKCS7_RECIP_INFO_get0_alg(ri, &alg);
if (alg != NULL)
return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
V_ASN1_NULL, NULL);
}
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_get0_serialNumber(x509))))
return 0;
pkey = X509_get0_pubkey(x509);
if (pkey == NULL)
return 0;
if (EVP_PKEY_is_a(pkey, "RSA-PSS"))
return -2;
if (EVP_PKEY_is_a(pkey, "RSA")) {
if (pkcs7_rsa_encrypt_decrypt_setup(p7i, 0) <= 0)
goto err;
goto finished;
}
if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL) {
ERR_raise(ERR_LIB_PKCS7,
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) {
ERR_raise(ERR_LIB_PKCS7,
PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
goto err;
}
if (ret <= 0) {
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_ENCRYPTION_CTRL_FAILURE);
goto err;
}
finished:
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:
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
return 0;
}
/* Check cipher OID exists and has data in it */
i = EVP_CIPHER_get_type(cipher);
if (i == NID_undef) {
ERR_raise(ERR_LIB_PKCS7, PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
return 0;
}
ec->cipher = cipher;
ec->ctx = ossl_pkcs7_get0_ctx(p7);
return 1;
}
/* unfortunately cannot constify BIO_new_NDEF() due to this and CMS_stream() */
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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