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/*
* Copyright 2019 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 <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/dsa.h>
#include <openssl/types.h>
#include <openssl/params.h>
#include "prov/bio.h"
#include "prov/implementations.h"
#include "serializer_local.h"
static OSSL_OP_serializer_newctx_fn dsa_priv_newctx;
static OSSL_OP_serializer_freectx_fn dsa_priv_freectx;
static OSSL_OP_serializer_set_ctx_params_fn dsa_priv_set_ctx_params;
static OSSL_OP_serializer_settable_ctx_params_fn dsa_priv_settable_ctx_params;
static OSSL_OP_serializer_serialize_data_fn dsa_priv_der_data;
static OSSL_OP_serializer_serialize_object_fn dsa_priv_der;
static OSSL_OP_serializer_serialize_data_fn dsa_pem_priv_data;
static OSSL_OP_serializer_serialize_object_fn dsa_pem_priv;
static OSSL_OP_serializer_newctx_fn dsa_print_newctx;
static OSSL_OP_serializer_freectx_fn dsa_print_freectx;
static OSSL_OP_serializer_serialize_data_fn dsa_priv_print_data;
static OSSL_OP_serializer_serialize_object_fn dsa_priv_print;
/*
* Context used for private key serialization.
*/
struct dsa_priv_ctx_st {
void *provctx;
struct pkcs8_encrypt_ctx_st sc;
};
/* Private key : context */
static void *dsa_priv_newctx(void *provctx)
{
struct dsa_priv_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
if (ctx != NULL) {
ctx->provctx = provctx;
}
/* -1 is the "whatever" indicator, i.e. the PKCS8 library default PBE */
ctx->sc.pbe_nid = -1;
return ctx;
}
static void dsa_priv_freectx(void *vctx)
{
struct dsa_priv_ctx_st *ctx = vctx;
EVP_CIPHER_free(ctx->sc.cipher);
OPENSSL_free(ctx->sc.cipher_pass);
OPENSSL_free(ctx);
}
static const OSSL_PARAM *dsa_priv_settable_ctx_params(void)
{
static const OSSL_PARAM settables[] = {
OSSL_PARAM_utf8_string(OSSL_SERIALIZER_PARAM_CIPHER, NULL, 0),
OSSL_PARAM_octet_string(OSSL_SERIALIZER_PARAM_PASS, NULL, 0),
OSSL_PARAM_END,
};
return settables;
}
static int dsa_priv_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
struct dsa_priv_ctx_st *ctx = vctx;
const OSSL_PARAM *p;
if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_CIPHER))
!= NULL) {
const OSSL_PARAM *propsp =
OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PROPERTIES);
const char *props = NULL;
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
if (propsp != NULL && propsp->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
props = (propsp != NULL ? propsp->data : NULL);
EVP_CIPHER_free(ctx->sc.cipher);
ctx->sc.cipher_intent = p->data != NULL;
if (p->data != NULL
&& ((ctx->sc.cipher = EVP_CIPHER_fetch(NULL, p->data, props))
== NULL))
return 0;
}
if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PASS))
!= NULL) {
OPENSSL_free(ctx->sc.cipher_pass);
ctx->sc.cipher_pass = NULL;
if (!OSSL_PARAM_get_octet_string(p, &ctx->sc.cipher_pass, 0,
&ctx->sc.cipher_pass_length))
return 0;
}
return 1;
}
/* Private key : DER */
static int dsa_priv_der_data(void *vctx, const OSSL_PARAM params[], BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
struct dsa_priv_ctx_st *ctx = vctx;
OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
ossl_prov_get_dsa_importkey();
int ok = 0;
if (dsa_importkey != NULL) {
DSA *dsa = dsa_importkey(ctx->provctx, params);
ok = dsa_priv_der(ctx, dsa, out, cb, cbarg);
DSA_free(dsa);
}
return ok;
}
static int dsa_priv_der(void *vctx, void *dsa, BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
struct dsa_priv_ctx_st *ctx = vctx;
ctx->sc.cb = cb;
ctx->sc.cbarg = cbarg;
return ossl_prov_write_priv_der_from_obj(out, dsa, EVP_PKEY_DSA,
ossl_prov_prepare_dsa_params,
ossl_prov_dsa_priv_to_der,
&ctx->sc);
}
/* Private key : PEM */
static int dsa_pem_priv_data(void *vctx, const OSSL_PARAM params[], BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
struct dsa_priv_ctx_st *ctx = vctx;
OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
ossl_prov_get_dsa_importkey();
int ok = 0;
if (dsa_importkey != NULL) {
DSA *dsa = dsa_importkey(ctx, params);
ok = dsa_pem_priv(ctx->provctx, dsa, out, cb, cbarg);
DSA_free(dsa);
}
return ok;
}
static int dsa_pem_priv(void *vctx, void *dsa, BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
struct dsa_priv_ctx_st *ctx = vctx;
ctx->sc.cb = cb;
ctx->sc.cbarg = cbarg;
return ossl_prov_write_priv_pem_from_obj(out, dsa, EVP_PKEY_DSA,
ossl_prov_prepare_dsa_params,
ossl_prov_dsa_priv_to_der,
&ctx->sc);
}
/*
* There's no specific print context, so we use the provider context
*/
static void *dsa_print_newctx(void *provctx)
{
return provctx;
}
static void dsa_print_freectx(void *ctx)
{
}
static int dsa_priv_print_data(void *provctx, const OSSL_PARAM params[],
BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
ossl_prov_get_dsa_importkey();
int ok = 0;
if (dsa_importkey != NULL) {
DSA *dsa = dsa_importkey(provctx, params); /* ctx == provctx */
ok = dsa_priv_print(provctx, dsa, out, cb, cbarg);
DSA_free(dsa);
}
return ok;
}
static int dsa_priv_print(void *ctx, void *dsa, BIO *out,
OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
{
return ossl_prov_print_dsa(out, dsa, dsa_print_priv);
}
const OSSL_DISPATCH dsa_priv_der_serializer_functions[] = {
{ OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_priv_newctx },
{ OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_priv_freectx },
{ OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
(void (*)(void))dsa_priv_set_ctx_params },
{ OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
(void (*)(void))dsa_priv_settable_ctx_params },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_priv_der_data },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_priv_der },
{ 0, NULL }
};
const OSSL_DISPATCH dsa_priv_pem_serializer_functions[] = {
{ OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_priv_newctx },
{ OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_priv_freectx },
{ OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
(void (*)(void))dsa_priv_set_ctx_params },
{ OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
(void (*)(void))dsa_priv_settable_ctx_params },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_pem_priv_data },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_pem_priv },
{ 0, NULL }
};
const OSSL_DISPATCH dsa_priv_text_serializer_functions[] = {
{ OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_print_newctx },
{ OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_print_freectx },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_priv_print },
{ OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
(void (*)(void))dsa_priv_print_data },
{ 0, NULL }
};
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