87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
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* Copyright (c) 2018 Damien Miller <djm@mindrot.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "includes.h"
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#ifdef WITH_OPENSSL
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/evp.h>
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#ifndef HAVE_EVP_CIPHER_CTX_GET_IV
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int
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EVP_CIPHER_CTX_get_iv(const EVP_CIPHER_CTX *ctx, unsigned char *iv, size_t len)
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{
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if (ctx == NULL)
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return 0;
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if (EVP_CIPHER_CTX_iv_length(ctx) < 0)
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return 0;
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if (len != (size_t)EVP_CIPHER_CTX_iv_length(ctx))
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return 0;
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if (len > EVP_MAX_IV_LENGTH)
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return 0; /* sanity check; shouldn't happen */
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/*
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* Skip the memcpy entirely when the requested IV length is zero,
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* since the iv pointer may be NULL or invalid.
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*/
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if (len != 0) {
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if (iv == NULL)
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return 0;
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# ifdef HAVE_EVP_CIPHER_CTX_IV
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memcpy(iv, EVP_CIPHER_CTX_iv(ctx), len);
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# else
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memcpy(iv, ctx->iv, len);
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# endif /* HAVE_EVP_CIPHER_CTX_IV */
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}
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return 1;
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}
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#endif /* HAVE_EVP_CIPHER_CTX_GET_IV */
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#ifndef HAVE_EVP_CIPHER_CTX_SET_IV
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int
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EVP_CIPHER_CTX_set_iv(EVP_CIPHER_CTX *ctx, const unsigned char *iv, size_t len)
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{
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if (ctx == NULL)
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return 0;
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if (EVP_CIPHER_CTX_iv_length(ctx) < 0)
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return 0;
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if (len != (size_t)EVP_CIPHER_CTX_iv_length(ctx))
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return 0;
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if (len > EVP_MAX_IV_LENGTH)
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return 0; /* sanity check; shouldn't happen */
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/*
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* Skip the memcpy entirely when the requested IV length is zero,
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* since the iv pointer may be NULL or invalid.
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*/
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if (len != 0) {
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if (iv == NULL)
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return 0;
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# ifdef HAVE_EVP_CIPHER_CTX_IV_NOCONST
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memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, len);
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# else
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memcpy(ctx->iv, iv, len);
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# endif /* HAVE_EVP_CIPHER_CTX_IV_NOCONST */
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}
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return 1;
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}
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#endif /* HAVE_EVP_CIPHER_CTX_SET_IV */
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#endif /* WITH_OPENSSL */
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