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068489a27f
Libssl uses the null cipher in certain situations. It should be converted to a provided cipher. Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10865)
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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* Copyright 2020 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 <string.h>
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#include <openssl/crypto.h>
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#include <openssl/core_numbers.h>
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#include "prov/implementations.h"
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#include "prov/ciphercommon.h"
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#include "prov/providercommonerr.h"
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static OSSL_OP_cipher_newctx_fn null_newctx;
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static void *null_newctx(void *provctx)
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{
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static int dummy = 0;
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return &dummy;
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}
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static OSSL_OP_cipher_freectx_fn null_freectx;
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static void null_freectx(void *vctx)
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{
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}
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static OSSL_OP_cipher_encrypt_init_fn null_init;
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static int null_init(void *vctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen)
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{
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return 1;
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}
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static OSSL_OP_cipher_cipher_fn null_cipher;
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static int null_cipher(void *vctx, unsigned char *out, size_t *outl,
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size_t outsize, const unsigned char *in, size_t inl)
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{
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if (outsize < inl)
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return 0;
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if (in != out)
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memcpy(out, in, inl);
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*outl = inl;
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return 1;
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}
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static OSSL_OP_cipher_final_fn null_final;
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static int null_final(void *vctx, unsigned char *out, size_t *outl,
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size_t outsize)
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{
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*outl = 0;
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return 1;
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}
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static OSSL_OP_cipher_get_params_fn null_get_params;
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static int null_get_params(OSSL_PARAM params[])
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{
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return cipher_generic_get_params(params, 0, 0, 0, 8, 0);
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}
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static const OSSL_PARAM null_known_gettable_ctx_params[] = {
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OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
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OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
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OSSL_PARAM_END
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};
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static OSSL_OP_cipher_gettable_ctx_params_fn null_gettable_ctx_params;
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static const OSSL_PARAM *null_gettable_ctx_params(void)
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{
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return null_known_gettable_ctx_params;
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}
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static OSSL_OP_cipher_get_ctx_params_fn null_get_ctx_params;
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static int null_get_ctx_params(void *vctx, OSSL_PARAM params[])
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{
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OSSL_PARAM *p;
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p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
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if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
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return 0;
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}
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p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
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if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
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return 0;
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}
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return 1;
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}
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const OSSL_DISPATCH null_functions[] = {
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{ OSSL_FUNC_CIPHER_NEWCTX,
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(void (*)(void)) null_newctx },
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{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) null_freectx },
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{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) null_newctx },
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{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))null_init },
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{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))null_init },
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{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))null_cipher },
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{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))null_final },
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{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))null_cipher },
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{ OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void)) null_get_params },
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{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
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(void (*)(void))cipher_generic_gettable_params },
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{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))null_get_ctx_params },
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{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
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(void (*)(void))null_gettable_ctx_params },
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{ 0, NULL }
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};
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