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authorJung-uk Kim <jkim@FreeBSD.org>2018-09-13 20:40:51 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2018-09-13 20:40:51 +0000
commite71b70530d95c4f34d8bdbd78d1242df1ba4a945 (patch)
treead6275bcad7894dc16f27ef882a2934a3d80bc14 /crypto/openssl/crypto/modes/wrap128.c
parent73511c241bab29b078c84d992082cc44513c608d (diff)
parenta43ce912fc025d11e1395506111f75fc194d7ba5 (diff)
downloadsrc-e71b70530d95c4f34d8bdbd78d1242df1ba4a945.tar.gz
src-e71b70530d95c4f34d8bdbd78d1242df1ba4a945.zip
Update OpenSSL to 1.1.1.
Note it does not update build infrastructure.
Notes
Notes: svn path=/projects/openssl111/; revision=338663
Diffstat (limited to 'crypto/openssl/crypto/modes/wrap128.c')
-rw-r--r--crypto/openssl/crypto/modes/wrap128.c313
1 files changed, 253 insertions, 60 deletions
diff --git a/crypto/openssl/crypto/modes/wrap128.c b/crypto/openssl/crypto/modes/wrap128.c
index 384978371af2..d7e56cc260ad 100644
--- a/crypto/openssl/crypto/modes/wrap128.c
+++ b/crypto/openssl/crypto/modes/wrap128.c
@@ -1,70 +1,50 @@
-/* crypto/modes/wrap128.c */
/*
- * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project.
- */
-/* ====================================================================
- * 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/)"
+ * Copyright 2013-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * 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.
- *
- * 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/)"
+ * 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
+ */
+
+/** Beware!
*
- * 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.
- * ====================================================================
+ * Following wrapping modes were designed for AES but this implementation
+ * allows you to use them for any 128 bit block cipher.
*/
-#include "cryptlib.h"
+#include "internal/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,
};
-/*
- * Input size limit: lower than maximum of standards but far larger than
- * anything that will be used in practice.
+/** 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.
*/
#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,
@@ -72,7 +52,7 @@ 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 < 8) || (inlen > CRYPTO128_WRAP_MAX))
+ if ((inlen & 0x7) || (inlen < 16) || (inlen > CRYPTO128_WRAP_MAX))
return 0;
A = B;
t = 1;
@@ -100,10 +80,26 @@ size_t CRYPTO_128_wrap(void *key, const unsigned char *iv,
return inlen + 8;
}
-size_t CRYPTO_128_unwrap(void *key, const unsigned char *iv,
- unsigned char *out,
- const unsigned char *in, size_t inlen,
- block128_f block)
+/** 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)
{
unsigned char *A, B[16], *R;
size_t i, j, t;
@@ -128,11 +124,208 @@ size_t CRYPTO_128_unwrap(void *key, const 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 (memcmp(A, iv, 8)) {
+ 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 - 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 [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;
+
+ 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])
+ */
+ unsigned char buff[16];
+
+ block(in, buff, key);
+ memcpy(aiv, buff, 8);
+ /* Remove AIV */
+ memcpy(out, buff + 8, 8);
+ padded_len = 8;
+ OPENSSL_cleanse(buff, inlen);
+ } else {
+ padded_len = inlen - 8;
+ ret = crypto_128_unwrap_raw(key, aiv, out, in, 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;
}
- return inlen;
+
+ /*
+ * 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) {
+ OPENSSL_cleanse(out, inlen);
+ return 0;
+ }
+
+ /* Section 4.2 step 3: Remove padding */
+ return ptext_len;
}