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f75abcc0f0
Fixes #10438 issue found by clusterfuzz/ossfuzz The dest was getting a copy of the src structure which contained a pointer that should point to an offset inside itself - because of the copy it was pointing to the original structure. The setup for a ctx is mainly done by the initkey method in the PROV_CIPHER_HW structure. Because of this it makes sense that the structure should also contain a copyctx method that is use to resolve any pointers that need to be setup. A dup_ctx has been added to the cipher_enc tests in evp_test. It does a dup after setup and then frees the original ctx. This detects any floating pointers in the duplicated context that were pointing back to the freed ctx. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10443)
47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/*
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* Copyright 2019 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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#include "cipher_sm4.h"
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static int cipher_hw_sm4_initkey(PROV_CIPHER_CTX *ctx,
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const unsigned char *key, size_t keylen)
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{
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PROV_SM4_CTX *sctx = (PROV_SM4_CTX *)ctx;
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SM4_KEY *ks = &sctx->ks.ks;
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SM4_set_key(key, ks);
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ctx->ks = ks;
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if (ctx->enc
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|| (ctx->mode != EVP_CIPH_ECB_MODE
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&& ctx->mode != EVP_CIPH_CBC_MODE))
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ctx->block = (block128_f)SM4_encrypt;
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else
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ctx->block = (block128_f)SM4_decrypt;
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return 1;
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}
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IMPLEMENT_CIPHER_HW_COPYCTX(cipher_hw_sm4_copyctx, PROV_SM4_CTX)
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# define PROV_CIPHER_HW_sm4_mode(mode) \
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static const PROV_CIPHER_HW sm4_##mode = { \
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cipher_hw_sm4_initkey, \
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cipher_hw_chunked_##mode, \
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cipher_hw_sm4_copyctx \
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}; \
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const PROV_CIPHER_HW *PROV_CIPHER_HW_sm4_##mode(size_t keybits) \
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{ \
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return &sm4_##mode; \
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}
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PROV_CIPHER_HW_sm4_mode(cbc)
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PROV_CIPHER_HW_sm4_mode(ecb)
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PROV_CIPHER_HW_sm4_mode(ofb128)
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PROV_CIPHER_HW_sm4_mode(cfb128)
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PROV_CIPHER_HW_sm4_mode(ctr)
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