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/*
* Copyright 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
*/
/*
* RSA low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <openssl/core_dispatch.h>
#include <openssl/core_names.h>
#include <openssl/crypto.h>
#include <openssl/params.h>
#include <openssl/x509.h>
#include "prov/bio.h"
#include "prov/implementations.h"
#include "serializer_local.h"
static OSSL_FUNC_deserializer_newctx_fn der2rsa_newctx;
static OSSL_FUNC_deserializer_freectx_fn der2rsa_freectx;
static OSSL_FUNC_deserializer_gettable_params_fn der2rsa_gettable_params;
static OSSL_FUNC_deserializer_get_params_fn der2rsa_get_params;
static OSSL_FUNC_deserializer_deserialize_fn der2rsa_deserialize;
static OSSL_FUNC_deserializer_export_object_fn der2rsa_export_object;
/*
* Context used for DER to RSA key deserialization.
*/
struct der2rsa_ctx_st {
PROV_CTX *provctx;
#if 0
struct pkcs8_encrypt_ctx_st sc;
#endif
};
static void *der2rsa_newctx(void *provctx)
{
struct der2rsa_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
if (ctx != NULL) {
ctx->provctx = provctx;
}
return ctx;
}
static void der2rsa_freectx(void *vctx)
{
struct der2rsa_ctx_st *ctx = vctx;
OPENSSL_free(ctx);
}
static const OSSL_PARAM *der2rsa_gettable_params(void)
{
static const OSSL_PARAM gettables[] = {
{ OSSL_DESERIALIZER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 },
OSSL_PARAM_END,
};
return gettables;
}
static int der2rsa_get_params(OSSL_PARAM params[])
{
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_DESERIALIZER_PARAM_INPUT_TYPE);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "DER"))
return 0;
return 1;
}
static int der2rsa_deserialize(void *vctx, OSSL_CORE_BIO *cin,
OSSL_CALLBACK *data_cb, void *data_cbarg,
OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
{
struct der2rsa_ctx_st *ctx = vctx;
void *libctx = PROV_LIBRARY_CONTEXT_OF(ctx->provctx);
RSA *rsa = NULL;
unsigned char *der = NULL;
const unsigned char *derp;
long der_len = 0;
EVP_PKEY *pkey = NULL;
int ok = 0;
if (!ossl_prov_read_der(ctx->provctx, cin, &der, &der_len))
return 0;
derp = der;
#if 0 /* PKCS#8 decryption coming soon */
X509_SIG *p8 = NULL;
if ((p8 = d2i_X509_SIG(NULL, &derp, der_len)) != NULL) {
const X509_ALGOR *dalg = NULL;
const ASN1_OCTET_STRING *doct = NULL;
unsigned char *new_data = NULL;
int new_data_len;
/* passphrase fetching code TBA */
X509_SIG_get0(p8, &dalg, &doct);
if (!PKCS12_pbe_crypt(dalg, pass, strlen(pass),
doct->data, doct->length,
&new_data, &new_data_len, 0))
goto nop8;
OPENSSL_free(der);
der = new_data;
der_len = new_data_len;
}
X509_SIG_free(p8);
nop8:
#endif
derp = der;
if ((pkey = d2i_PrivateKey_ex(EVP_PKEY_RSA, NULL, &derp, der_len,
libctx, NULL)) != NULL) {
/* Tear out the RSA pointer from the pkey */
rsa = EVP_PKEY_get1_RSA(pkey);
EVP_PKEY_free(pkey);
}
OPENSSL_free(der);
if (rsa != NULL) {
OSSL_PARAM params[3];
params[0] =
OSSL_PARAM_construct_utf8_string(OSSL_DESERIALIZER_PARAM_DATA_TYPE,
"RSA", 0);
/* The address of the key becomes the octet string */
params[1] =
OSSL_PARAM_construct_octet_string(OSSL_DESERIALIZER_PARAM_REFERENCE,
&rsa, sizeof(rsa));
params[2] = OSSL_PARAM_construct_end();
ok = data_cb(params, data_cbarg);
}
RSA_free(rsa);
return ok;
}
static int der2rsa_export_object(void *vctx,
const void *reference, size_t reference_sz,
OSSL_CALLBACK *export_cb, void *export_cbarg)
{
OSSL_FUNC_keymgmt_export_fn *rsa_export =
ossl_prov_get_keymgmt_rsa_export();
void *keydata;
if (reference_sz == sizeof(keydata) && rsa_export != NULL) {
/* The contents of the reference is the address to our object */
keydata = *(RSA **)reference;
return rsa_export(keydata, OSSL_KEYMGMT_SELECT_ALL,
export_cb, export_cbarg);
}
return 0;
}
const OSSL_DISPATCH der_to_rsa_deserializer_functions[] = {
{ OSSL_FUNC_DESERIALIZER_NEWCTX, (void (*)(void))der2rsa_newctx },
{ OSSL_FUNC_DESERIALIZER_FREECTX, (void (*)(void))der2rsa_freectx },
{ OSSL_FUNC_DESERIALIZER_GETTABLE_PARAMS,
(void (*)(void))der2rsa_gettable_params },
{ OSSL_FUNC_DESERIALIZER_GET_PARAMS,
(void (*)(void))der2rsa_get_params },
{ OSSL_FUNC_DESERIALIZER_DESERIALIZE,
(void (*)(void))der2rsa_deserialize },
{ OSSL_FUNC_DESERIALIZER_EXPORT_OBJECT,
(void (*)(void))der2rsa_export_object },
{ 0, NULL }
};
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