mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
240 lines
8.3 KiB
C
240 lines
8.3 KiB
C
/*
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* Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <string.h>
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#include <openssl/core_dispatch.h>
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#include <openssl/core_names.h>
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#include <openssl/core_object.h>
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#include <openssl/crypto.h>
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#include <openssl/params.h>
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#include <openssl/err.h>
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#include <openssl/pem.h> /* For public PVK functions */
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#include <openssl/x509.h>
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#include "internal/passphrase.h"
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#include "crypto/pem.h" /* For internal PVK and "blob" headers */
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#include "crypto/rsa.h"
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#include "prov/bio.h"
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#include "prov/implementations.h"
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#include "endecoder_local.h"
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struct pvk2key_ctx_st; /* Forward declaration */
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typedef int check_key_fn(void *, struct pvk2key_ctx_st *ctx);
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typedef void adjust_key_fn(void *, struct pvk2key_ctx_st *ctx);
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typedef void *b2i_PVK_of_bio_pw_fn(BIO *in, pem_password_cb *cb, void *u,
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OSSL_LIB_CTX *libctx, const char *propq);
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typedef void free_key_fn(void *);
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struct keytype_desc_st {
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int type; /* EVP key type */
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const char *name; /* Keytype */
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const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */
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b2i_PVK_of_bio_pw_fn *read_private_key;
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adjust_key_fn *adjust_key;
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free_key_fn *free_key;
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};
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static OSSL_FUNC_decoder_freectx_fn pvk2key_freectx;
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static OSSL_FUNC_decoder_decode_fn pvk2key_decode;
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static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object;
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/*
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* Context used for DER to key decoding.
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*/
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struct pvk2key_ctx_st {
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PROV_CTX *provctx;
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const struct keytype_desc_st *desc;
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/* The selection that is passed to der2key_decode() */
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int selection;
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};
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static struct pvk2key_ctx_st *
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pvk2key_newctx(void *provctx, const struct keytype_desc_st *desc)
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{
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struct pvk2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx != NULL) {
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ctx->provctx = provctx;
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ctx->desc = desc;
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}
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return ctx;
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}
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static void pvk2key_freectx(void *vctx)
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{
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struct pvk2key_ctx_st *ctx = vctx;
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OPENSSL_free(ctx);
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}
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static int pvk2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection,
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OSSL_CALLBACK *data_cb, void *data_cbarg,
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OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
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{
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struct pvk2key_ctx_st *ctx = vctx;
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BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin);
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void *key = NULL;
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int ok = 0;
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if (in == NULL)
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return 0;
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ctx->selection = selection;
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if ((selection == 0
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|| (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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&& ctx->desc->read_private_key != NULL) {
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struct ossl_passphrase_data_st pwdata;
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int err, lib, reason;
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memset(&pwdata, 0, sizeof(pwdata));
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if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg))
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goto end;
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key = ctx->desc->read_private_key(in, ossl_pw_pvk_password, &pwdata,
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PROV_LIBCTX_OF(ctx->provctx), NULL);
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/*
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* Because the PVK API doesn't have a separate decrypt call, we need
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* to check the error queue for certain well known errors that are
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* considered fatal and which we pass through, while the rest gets
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* thrown away.
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*/
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err = ERR_peek_last_error();
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lib = ERR_GET_LIB(err);
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reason = ERR_GET_REASON(err);
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if (lib == ERR_LIB_PEM
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&& (reason == PEM_R_BAD_PASSWORD_READ
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|| reason == PEM_R_BAD_DECRYPT)) {
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ERR_clear_last_mark();
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goto end;
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}
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if (selection != 0 && key == NULL)
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goto next;
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}
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if (key != NULL && ctx->desc->adjust_key != NULL)
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ctx->desc->adjust_key(key, ctx);
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next:
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/*
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* Indicated that we successfully decoded something, or not at all.
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* Ending up "empty handed" is not an error.
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*/
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ok = 1;
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/*
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* We free resources here so it's not held up during the callback, because
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* we know the process is recursive and the allocated chunks of memory
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* add up.
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*/
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BIO_free(in);
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in = NULL;
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if (key != NULL) {
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OSSL_PARAM params[4];
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int object_type = OSSL_OBJECT_PKEY;
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params[0] =
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OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type);
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params[1] =
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OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE,
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(char *)ctx->desc->name, 0);
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/* The address of the key becomes the octet string */
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params[2] =
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OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE,
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&key, sizeof(key));
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params[3] = OSSL_PARAM_construct_end();
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ok = data_cb(params, data_cbarg);
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}
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end:
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BIO_free(in);
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ctx->desc->free_key(key);
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return ok;
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}
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static int pvk2key_export_object(void *vctx,
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const void *reference, size_t reference_sz,
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OSSL_CALLBACK *export_cb, void *export_cbarg)
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{
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struct pvk2key_ctx_st *ctx = vctx;
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OSSL_FUNC_keymgmt_export_fn *export =
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ossl_prov_get_keymgmt_export(ctx->desc->fns);
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void *keydata;
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if (reference_sz == sizeof(keydata) && export != NULL) {
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/* The contents of the reference is the address to our object */
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keydata = *(void **)reference;
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return export(keydata, ctx->selection, export_cb, export_cbarg);
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}
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return 0;
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}
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/* ---------------------------------------------------------------------- */
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#define dsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio_ex
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#define dsa_adjust NULL
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#define dsa_free (void (*)(void *))DSA_free
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/* ---------------------------------------------------------------------- */
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#define rsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_RSA_PVK_bio_ex
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static void rsa_adjust(void *key, struct pvk2key_ctx_st *ctx)
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{
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ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx));
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}
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#define rsa_free (void (*)(void *))RSA_free
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/* ---------------------------------------------------------------------- */
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#define IMPLEMENT_MS(KEYTYPE, keytype) \
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static const struct keytype_desc_st \
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pvk2##keytype##_desc = { \
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EVP_PKEY_##KEYTYPE, #KEYTYPE, \
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ossl_##keytype##_keymgmt_functions, \
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keytype##_private_key_bio, \
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keytype##_adjust, \
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keytype##_free \
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}; \
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static OSSL_FUNC_decoder_newctx_fn pvk2##keytype##_newctx; \
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static void *pvk2##keytype##_newctx(void *provctx) \
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{ \
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return pvk2key_newctx(provctx, &pvk2##keytype##_desc); \
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} \
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const OSSL_DISPATCH \
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ossl_##pvk_to_##keytype##_decoder_functions[] = { \
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{ OSSL_FUNC_DECODER_NEWCTX, \
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(void (*)(void))pvk2##keytype##_newctx }, \
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{ OSSL_FUNC_DECODER_FREECTX, \
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(void (*)(void))pvk2key_freectx }, \
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{ OSSL_FUNC_DECODER_DECODE, \
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(void (*)(void))pvk2key_decode }, \
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{ OSSL_FUNC_DECODER_EXPORT_OBJECT, \
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(void (*)(void))pvk2key_export_object }, \
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{ 0, NULL } \
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}
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#ifndef OPENSSL_NO_DSA
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IMPLEMENT_MS(DSA, dsa);
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#endif
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IMPLEMENT_MS(RSA, rsa);
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