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@@ -1,5 +1,5 @@
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/*
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* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright 1995-2020 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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@@ -76,13 +76,15 @@ int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
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goto err;
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/* ... but, we should get a return size too! */
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if (params[0].return_size != 0
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if (OSSL_PARAM_modified(params)
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&& params[0].return_size != 0
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&& (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
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params[0].data = der;
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params[0].data_size = params[0].return_size;
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params[0].return_size = 0;
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OSSL_PARAM_set_all_unmodified(params);
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derp = der;
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if (EVP_CIPHER_CTX_get_params(c, params)
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&& OSSL_PARAM_modified(params)
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&& d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
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params[0].return_size) != NULL) {
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ret = 1;
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