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-rw-r--r--src/decrepit/xts/xts.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/src/decrepit/xts/xts.c b/src/decrepit/xts/xts.c
deleted file mode 100644
index cf8ad39..0000000
--- a/src/decrepit/xts/xts.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/* ====================================================================
- * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ==================================================================== */
-
-#include <openssl/evp.h>
-
-#include <string.h>
-
-#include <openssl/aes.h>
-#include <openssl/cipher.h>
-#include <openssl/modes.h>
-
-
-#if defined(OPENSSL_X86_64) || defined(OPENSSL_X86) || defined(OPENSSL_AARCH64)
-#define STRICT_ALIGNMENT 0
-#else
-#define STRICT_ALIGNMENT 1
-#endif
-
-typedef struct xts128_context {
- void *key1, *key2;
- block128_f block1, block2;
-} XTS128_CONTEXT;
-
-static size_t CRYPTO_xts128_encrypt(const XTS128_CONTEXT *ctx,
- const uint8_t iv[16], const uint8_t *inp,
- uint8_t *out, size_t len, int enc) {
- const union {
- long one;
- char little;
- } is_endian = {1};
- union {
- uint64_t u[2];
- uint32_t d[4];
- uint8_t c[16];
- } tweak, scratch;
- unsigned int i;
-
- if (len < 16) return 0;
-
- memcpy(tweak.c, iv, 16);
-
- (*ctx->block2)(tweak.c, tweak.c, ctx->key2);
-
- if (!enc && (len % 16)) len -= 16;
-
- while (len >= 16) {
-#if defined(STRICT_ALIGNMENT)
- memcpy(scratch.c, inp, 16);
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
-#else
- scratch.u[0] = ((unint64_t *)inp)[0] ^ tweak.u[0];
- scratch.u[1] = ((unint64_t *)inp)[1] ^ tweak.u[1];
-#endif
- (*ctx->block1)(scratch.c, scratch.c, ctx->key1);
-#if defined(STRICT_ALIGNMENT)
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- memcpy(out, scratch.c, 16);
-#else
- ((unint64_t *)out)[0] = scratch.u[0] ^= tweak.u[0];
- ((unint64_t *)out)[1] = scratch.u[1] ^= tweak.u[1];
-#endif
- inp += 16;
- out += 16;
- len -= 16;
-
- if (len == 0) return 1;
-
- if (is_endian.little) {
- unsigned int carry, res;
-
- res = 0x87 & (((int)tweak.d[3]) >> 31);
- carry = (unsigned int)(tweak.u[0] >> 63);
- tweak.u[0] = (tweak.u[0] << 1) ^ res;
- tweak.u[1] = (tweak.u[1] << 1) | carry;
- } else {
- size_t c;
-
- for (c = 0, i = 0; i < 16; ++i) {
- /*
- * + substitutes for |, because c is 1 bit
- */
- c += ((size_t)tweak.c[i]) << 1;
- tweak.c[i] = (uint8_t)c;
- c = c >> 8;
- }
- tweak.c[0] ^= (uint8_t)(0x87 & (0 - c));
- }
- }
- if (enc) {
- for (i = 0; i < len; ++i) {
- uint8_t c = inp[i];
- out[i] = scratch.c[i];
- scratch.c[i] = c;
- }
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- (*ctx->block1)(scratch.c, scratch.c, ctx->key1);
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- memcpy(out - 16, scratch.c, 16);
- } else {
- union {
- uint64_t u[2];
- uint8_t c[16];
- } tweak1;
-
- if (is_endian.little) {
- unsigned int carry, res;
-
- res = 0x87 & (((int)tweak.d[3]) >> 31);
- carry = (unsigned int)(tweak.u[0] >> 63);
- tweak1.u[0] = (tweak.u[0] << 1) ^ res;
- tweak1.u[1] = (tweak.u[1] << 1) | carry;
- } else {
- size_t c;
-
- for (c = 0, i = 0; i < 16; ++i) {
- /*
- * + substitutes for |, because c is 1 bit
- */
- c += ((size_t)tweak.c[i]) << 1;
- tweak1.c[i] = (uint8_t)c;
- c = c >> 8;
- }
- tweak1.c[0] ^= (uint8_t)(0x87 & (0 - c));
- }
-#if defined(STRICT_ALIGNMENT)
- memcpy(scratch.c, inp, 16);
- scratch.u[0] ^= tweak1.u[0];
- scratch.u[1] ^= tweak1.u[1];
-#else
- scratch.u[0] = ((unint64_t *)inp)[0] ^ tweak1.u[0];
- scratch.u[1] = ((unint64_t *)inp)[1] ^ tweak1.u[1];
-#endif
- (*ctx->block1)(scratch.c, scratch.c, ctx->key1);
- scratch.u[0] ^= tweak1.u[0];
- scratch.u[1] ^= tweak1.u[1];
-
- for (i = 0; i < len; ++i) {
- uint8_t c = inp[16 + i];
- out[16 + i] = scratch.c[i];
- scratch.c[i] = c;
- }
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- (*ctx->block1)(scratch.c, scratch.c, ctx->key1);
-#if defined(STRICT_ALIGNMENT)
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- memcpy(out, scratch.c, 16);
-#else
- ((unint64_t *)out)[0] = scratch.u[0] ^ tweak.u[0];
- ((unint64_t *)out)[1] = scratch.u[1] ^ tweak.u[1];
-#endif
- }
-
- return 1;
-}
-
-typedef struct {
- union {
- double align;
- AES_KEY ks;
- } ks1, ks2; /* AES key schedules to use */
- XTS128_CONTEXT xts;
-} EVP_AES_XTS_CTX;
-
-static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
- if (!iv && !key) {
- return 1;
- }
-
- if (key) {
- /* key_len is two AES keys */
- if (enc) {
- AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
- xctx->xts.block1 = (block128_f) AES_encrypt;
- } else {
- AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
- xctx->xts.block1 = (block128_f) AES_decrypt;
- }
-
- AES_set_encrypt_key(key + ctx->key_len / 2,
- ctx->key_len * 4, &xctx->ks2.ks);
- xctx->xts.block2 = (block128_f) AES_encrypt;
- xctx->xts.key1 = &xctx->ks1;
- }
-
- if (iv) {
- xctx->xts.key2 = &xctx->ks2;
- memcpy(ctx->iv, iv, 16);
- }
-
- return 1;
-}
-
-static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
- const uint8_t *in, size_t len) {
- EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
- if (!xctx->xts.key1 ||
- !xctx->xts.key2 ||
- !out ||
- !in ||
- len < AES_BLOCK_SIZE ||
- !CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len, ctx->encrypt)) {
- return 0;
- }
- return 1;
-}
-
-static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) {
- EVP_AES_XTS_CTX *xctx = c->cipher_data;
- if (type == EVP_CTRL_COPY) {
- EVP_CIPHER_CTX *out = ptr;
- EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
- if (xctx->xts.key1) {
- if (xctx->xts.key1 != &xctx->ks1) {
- return 0;
- }
- xctx_out->xts.key1 = &xctx_out->ks1;
- }
- if (xctx->xts.key2) {
- if (xctx->xts.key2 != &xctx->ks2) {
- return 0;
- }
- xctx_out->xts.key2 = &xctx_out->ks2;
- }
- return 1;
- } else if (type != EVP_CTRL_INIT) {
- return -1;
- }
- /* key1 and key2 are used as an indicator both key and IV are set */
- xctx->xts.key1 = NULL;
- xctx->xts.key2 = NULL;
- return 1;
-}
-
-static const EVP_CIPHER aes_256_xts = {
- NID_aes_256_xts, 1 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_XTS_CTX),
- EVP_CIPH_XTS_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_ALWAYS_CALL_INIT |
- EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY,
- NULL /* app_data */, aes_xts_init_key, aes_xts_cipher,
- NULL /* cleanup */, aes_xts_ctrl};
-
-const EVP_CIPHER *EVP_aes_256_xts(void) { return &aes_256_xts; }
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