diff options
Diffstat (limited to 'providers/implementations/ciphers/cipher_null.c')
-rw-r--r-- | providers/implementations/ciphers/cipher_null.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/providers/implementations/ciphers/cipher_null.c b/providers/implementations/ciphers/cipher_null.c new file mode 100644 index 0000000000..6443e65742 --- /dev/null +++ b/providers/implementations/ciphers/cipher_null.c @@ -0,0 +1,110 @@ +/* + * 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 + */ + +#include <string.h> +#include <openssl/crypto.h> +#include <openssl/core_numbers.h> +#include "prov/implementations.h" +#include "prov/ciphercommon.h" +#include "prov/providercommonerr.h" + +static OSSL_OP_cipher_newctx_fn null_newctx; +static void *null_newctx(void *provctx) +{ + static int dummy = 0; + + return &dummy; +} + +static OSSL_OP_cipher_freectx_fn null_freectx; +static void null_freectx(void *vctx) +{ +} + +static OSSL_OP_cipher_encrypt_init_fn null_init; +static int null_init(void *vctx, const unsigned char *key, size_t keylen, + const unsigned char *iv, size_t ivlen) +{ + return 1; +} + +static OSSL_OP_cipher_cipher_fn null_cipher; +static int null_cipher(void *vctx, unsigned char *out, size_t *outl, + size_t outsize, const unsigned char *in, size_t inl) +{ + if (outsize < inl) + return 0; + if (in != out) + memcpy(out, in, inl); + *outl = inl; + return 1; +} + +static OSSL_OP_cipher_final_fn null_final; +static int null_final(void *vctx, unsigned char *out, size_t *outl, + size_t outsize) +{ + *outl = 0; + return 1; +} + +static OSSL_OP_cipher_get_params_fn null_get_params; +static int null_get_params(OSSL_PARAM params[]) +{ + return cipher_generic_get_params(params, 0, 0, 0, 8, 0); +} + +static const OSSL_PARAM null_known_gettable_ctx_params[] = { + OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), + OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL), + OSSL_PARAM_END +}; + +static OSSL_OP_cipher_gettable_ctx_params_fn null_gettable_ctx_params; +static const OSSL_PARAM *null_gettable_ctx_params(void) +{ + return null_known_gettable_ctx_params; +} + +static OSSL_OP_cipher_get_ctx_params_fn null_get_ctx_params; +static int null_get_ctx_params(void *vctx, OSSL_PARAM params[]) +{ + OSSL_PARAM *p; + + p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN); + if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + return 0; + } + p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN); + if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + return 0; + } + return 1; +} + +const OSSL_DISPATCH null_functions[] = { + { OSSL_FUNC_CIPHER_NEWCTX, + (void (*)(void)) null_newctx }, + { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) null_freectx }, + { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) null_newctx }, + { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))null_init }, + { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))null_init }, + { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))null_cipher }, + { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))null_final }, + { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))null_cipher }, + { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void)) null_get_params }, + { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, + (void (*)(void))cipher_generic_gettable_params }, + { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))null_get_ctx_params }, + { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, + (void (*)(void))null_gettable_ctx_params }, + { 0, NULL } +}; |