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Diffstat (limited to 'Cryptlib/OpenSSL/crypto/modes/wrap128.c')
-rw-r--r--Cryptlib/OpenSSL/crypto/modes/wrap128.c311
1 files changed, 60 insertions, 251 deletions
diff --git a/Cryptlib/OpenSSL/crypto/modes/wrap128.c b/Cryptlib/OpenSSL/crypto/modes/wrap128.c
index 46809a0e..38497837 100644
--- a/Cryptlib/OpenSSL/crypto/modes/wrap128.c
+++ b/Cryptlib/OpenSSL/crypto/modes/wrap128.c
@@ -1,50 +1,70 @@
+/* crypto/modes/wrap128.c */
/*
- * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the OpenSSL license (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
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
*/
-
-/** Beware!
+/* ====================================================================
+ * Copyright (c) 2013 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
+ * licensing@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.
*
- * Following wrapping modes were designed for AES but this implementation
- * allows you to use them for any 128 bit block cipher.
+ * 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 "internal/cryptlib.h"
+#include "cryptlib.h"
#include <openssl/modes.h>
-/** RFC 3394 section 2.2.3.1 Default Initial Value */
static const unsigned char default_iv[] = {
0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
};
-/** RFC 5649 section 3 Alternative Initial Value 32-bit constant */
-static const unsigned char default_aiv[] = {
- 0xA6, 0x59, 0x59, 0xA6
-};
-
-/** Input size limit: lower than maximum of standards but far larger than
- * anything that will be used in practice.
+/*
+ * Input size limit: lower than maximum of standards but far larger than
+ * anything that will be used in practice.
*/
#define CRYPTO128_WRAP_MAX (1UL << 31)
-/** Wrapping according to RFC 3394 section 2.2.1.
- *
- * @param[in] key Key value.
- * @param[in] iv IV value. Length = 8 bytes. NULL = use default_iv.
- * @param[in] in Plaintext as n 64-bit blocks, n >= 2.
- * @param[in] inlen Length of in.
- * @param[out] out Ciphertext. Minimal buffer length = (inlen + 8) bytes.
- * Input and output buffers can overlap if block function
- * supports that.
- * @param[in] block Block processing function.
- * @return 0 if inlen does not consist of n 64-bit blocks, n >= 2.
- * or if inlen > CRYPTO128_WRAP_MAX.
- * Output length if wrapping succeeded.
- */
size_t CRYPTO_128_wrap(void *key, const unsigned char *iv,
unsigned char *out,
const unsigned char *in, size_t inlen,
@@ -52,7 +72,7 @@ size_t CRYPTO_128_wrap(void *key, const unsigned char *iv,
{
unsigned char *A, B[16], *R;
size_t i, j, t;
- if ((inlen & 0x7) || (inlen < 16) || (inlen > CRYPTO128_WRAP_MAX))
+ if ((inlen & 0x7) || (inlen < 8) || (inlen > CRYPTO128_WRAP_MAX))
return 0;
A = B;
t = 1;
@@ -80,26 +100,10 @@ size_t CRYPTO_128_wrap(void *key, const unsigned char *iv,
return inlen + 8;
}
-/** Unwrapping according to RFC 3394 section 2.2.2 steps 1-2.
- * The IV check (step 3) is responsibility of the caller.
- *
- * @param[in] key Key value.
- * @param[out] iv Unchecked IV value. Minimal buffer length = 8 bytes.
- * @param[out] out Plaintext without IV.
- * Minimal buffer length = (inlen - 8) bytes.
- * Input and output buffers can overlap if block function
- * supports that.
- * @param[in] in Ciphertext as n 64-bit blocks.
- * @param[in] inlen Length of in.
- * @param[in] block Block processing function.
- * @return 0 if inlen is out of range [24, CRYPTO128_WRAP_MAX]
- * or if inlen is not a multiple of 8.
- * Output length otherwise.
- */
-static size_t crypto_128_unwrap_raw(void *key, unsigned char *iv,
- unsigned char *out,
- const unsigned char *in, size_t inlen,
- block128_f block)
+size_t CRYPTO_128_unwrap(void *key, const unsigned char *iv,
+ unsigned char *out,
+ const unsigned char *in, size_t inlen,
+ block128_f block)
{
unsigned char *A, B[16], *R;
size_t i, j, t;
@@ -124,206 +128,11 @@ static size_t crypto_128_unwrap_raw(void *key, unsigned char *iv,
memcpy(R, B + 8, 8);
}
}
- memcpy(iv, A, 8);
- return inlen;
-}
-
-/** Unwrapping according to RFC 3394 section 2.2.2, including the IV check.
- * The first block of plaintext has to match the supplied IV, otherwise an
- * error is returned.
- *
- * @param[in] key Key value.
- * @param[out] iv IV value to match against. Length = 8 bytes.
- * NULL = use default_iv.
- * @param[out] out Plaintext without IV.
- * Minimal buffer length = (inlen - 8) bytes.
- * Input and output buffers can overlap if block function
- * supports that.
- * @param[in] in Ciphertext as n 64-bit blocks.
- * @param[in] inlen Length of in.
- * @param[in] block Block processing function.
- * @return 0 if inlen is out of range [24, CRYPTO128_WRAP_MAX]
- * or if inlen is not a multiple of 8
- * or if IV doesn't match expected value.
- * Output length otherwise.
- */
-size_t CRYPTO_128_unwrap(void *key, const unsigned char *iv,
- unsigned char *out, const unsigned char *in,
- size_t inlen, block128_f block)
-{
- size_t ret;
- unsigned char got_iv[8];
-
- ret = crypto_128_unwrap_raw(key, got_iv, out, in, inlen, block);
- if (ret == 0)
- return 0;
-
if (!iv)
iv = default_iv;
- if (CRYPTO_memcmp(got_iv, iv, 8)) {
- OPENSSL_cleanse(out, ret);
- return 0;
- }
- return ret;
-}
-
-/** Wrapping according to RFC 5649 section 4.1.
- *
- * @param[in] key Key value.
- * @param[in] icv (Non-standard) IV, 4 bytes. NULL = use default_aiv.
- * @param[out] out Ciphertext. Minimal buffer length = (inlen + 15) bytes.
- * Input and output buffers can overlap if block function
- * supports that.
- * @param[in] in Plaintext as n 64-bit blocks, n >= 2.
- * @param[in] inlen Length of in.
- * @param[in] block Block processing function.
- * @return 0 if inlen is out of range [1, CRYPTO128_WRAP_MAX].
- * Output length if wrapping succeeded.
- */
-size_t CRYPTO_128_wrap_pad(void *key, const unsigned char *icv,
- unsigned char *out,
- const unsigned char *in, size_t inlen,
- block128_f block)
-{
- /* n: number of 64-bit blocks in the padded key data
- *
- * If length of plain text is not a multiple of 8, pad the plain text octet
- * string on the right with octets of zeros, where final length is the
- * smallest multiple of 8 that is greater than length of plain text.
- * If length of plain text is a multiple of 8, then there is no padding. */
- const size_t blocks_padded = (inlen + 7) / 8; /* CEILING(m/8) */
- const size_t padded_len = blocks_padded * 8;
- const size_t padding_len = padded_len - inlen;
- /* RFC 5649 section 3: Alternative Initial Value */
- unsigned char aiv[8];
- int ret;
-
- /* Section 1: use 32-bit fixed field for plaintext octet length */
- if (inlen == 0 || inlen >= CRYPTO128_WRAP_MAX)
- return 0;
-
- /* Section 3: Alternative Initial Value */
- if (!icv)
- memcpy(aiv, default_aiv, 4);
- else
- memcpy(aiv, icv, 4); /* Standard doesn't mention this. */
-
- aiv[4] = (inlen >> 24) & 0xFF;
- aiv[5] = (inlen >> 16) & 0xFF;
- aiv[6] = (inlen >> 8) & 0xFF;
- aiv[7] = inlen & 0xFF;
-
- if (padded_len == 8) {
- /*
- * Section 4.1 - special case in step 2: If the padded plaintext
- * contains exactly eight octets, then prepend the AIV and encrypt
- * the resulting 128-bit block using AES in ECB mode.
- */
- memmove(out + 8, in, inlen);
- memcpy(out, aiv, 8);
- memset(out + 8 + inlen, 0, padding_len);
- block(out, out, key);
- ret = 16; /* AIV + padded input */
- } else {
- memmove(out, in, inlen);
- memset(out + inlen, 0, padding_len); /* Section 4.1 step 1 */
- ret = CRYPTO_128_wrap(key, aiv, out, out, padded_len, block);
- }
-
- return ret;
-}
-
-/** Unwrapping according to RFC 5649 section 4.2.
- *
- * @param[in] key Key value.
- * @param[in] icv (Non-standard) IV, 4 bytes. NULL = use default_aiv.
- * @param[out] out Plaintext. Minimal buffer length = inlen bytes.
- * Input and output buffers can overlap if block function
- * supports that.
- * @param[in] in Ciphertext as n 64-bit blocks.
- * @param[in] inlen Length of in.
- * @param[in] block Block processing function.
- * @return 0 if inlen is out of range [16, CRYPTO128_WRAP_MAX],
- * or if inlen is not a multiple of 8
- * or if IV and message length indicator doesn't match.
- * Output length if unwrapping succeeded and IV matches.
- */
-size_t CRYPTO_128_unwrap_pad(void *key, const unsigned char *icv,
- unsigned char *out,
- const unsigned char *in, size_t inlen,
- block128_f block)
-{
- /* n: number of 64-bit blocks in the padded key data */
- size_t n = inlen / 8 - 1;
- size_t padded_len;
- size_t padding_len;
- size_t ptext_len;
- /* RFC 5649 section 3: Alternative Initial Value */
- unsigned char aiv[8];
- static unsigned char zeros[8] = { 0x0 };
- size_t ret;
-
- /* Section 4.2: Ciphertext length has to be (n+1) 64-bit blocks. */
- if ((inlen & 0x7) != 0 || inlen < 16 || inlen >= CRYPTO128_WRAP_MAX)
- return 0;
-
- memmove(out, in, inlen);
- if (inlen == 16) {
- /*
- * Section 4.2 - special case in step 1: When n=1, the ciphertext
- * contains exactly two 64-bit blocks and they are decrypted as a
- * single AES block using AES in ECB mode: AIV | P[1] = DEC(K, C[0] |
- * C[1])
- */
- block(out, out, key);
- memcpy(aiv, out, 8);
- /* Remove AIV */
- memmove(out, out + 8, 8);
- padded_len = 8;
- } else {
- padded_len = inlen - 8;
- ret = crypto_128_unwrap_raw(key, aiv, out, out, inlen, block);
- if (padded_len != ret) {
- OPENSSL_cleanse(out, inlen);
- return 0;
- }
- }
-
- /*
- * Section 3: AIV checks: Check that MSB(32,A) = A65959A6. Optionally a
- * user-supplied value can be used (even if standard doesn't mention
- * this).
- */
- if ((!icv && CRYPTO_memcmp(aiv, default_aiv, 4))
- || (icv && CRYPTO_memcmp(aiv, icv, 4))) {
- OPENSSL_cleanse(out, inlen);
- return 0;
- }
-
- /*
- * Check that 8*(n-1) < LSB(32,AIV) <= 8*n. If so, let ptext_len =
- * LSB(32,AIV).
- */
-
- ptext_len = ((unsigned int)aiv[4] << 24)
- | ((unsigned int)aiv[5] << 16)
- | ((unsigned int)aiv[6] << 8)
- | (unsigned int)aiv[7];
- if (8 * (n - 1) >= ptext_len || ptext_len > 8 * n) {
- OPENSSL_cleanse(out, inlen);
- return 0;
- }
-
- /*
- * Check that the rightmost padding_len octets of the output data are
- * zero.
- */
- padding_len = padded_len - ptext_len;
- if (CRYPTO_memcmp(out + ptext_len, zeros, padding_len) != 0) {
+ if (memcmp(A, iv, 8)) {
OPENSSL_cleanse(out, inlen);
return 0;
}
-
- /* Section 4.2 step 3: Remove padding */
- return ptext_len;
+ return inlen;
}
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