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-rw-r--r--src/crypto/aes_wrap.c533
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diff --git a/src/crypto/aes_wrap.c b/src/crypto/aes_wrap.c
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--- a/src/crypto/aes_wrap.c
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@@ -1,533 +0,0 @@
-/*
- * AES-based functions
- *
- * - AES Key Wrap Algorithm (128-bit KEK) (RFC3394)
- * - One-Key CBC MAC (OMAC1, i.e., CMAC) hash with AES-128
- * - AES-128 CTR mode encryption
- * - AES-128 EAX mode encryption/decryption
- * - AES-128 CBC
- *
- * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "includes.h"
-
-#include "common.h"
-#include "aes_wrap.h"
-#include "crypto.h"
-
-#ifndef CONFIG_NO_AES_WRAP
-
-/**
- * aes_wrap - Wrap keys with AES Key Wrap Algorithm (128-bit KEK) (RFC3394)
- * @kek: 16-octet Key encryption key (KEK)
- * @n: Length of the plaintext key in 64-bit units; e.g., 2 = 128-bit = 16
- * bytes
- * @plain: Plaintext key to be wrapped, n * 64 bits
- * @cipher: Wrapped key, (n + 1) * 64 bits
- * Returns: 0 on success, -1 on failure
- */
-int aes_wrap(const u8 *kek, int n, const u8 *plain, u8 *cipher)
-{
- u8 *a, *r, b[16];
- int i, j;
- void *ctx;
-
- a = cipher;
- r = cipher + 8;
-
- /* 1) Initialize variables. */
- os_memset(a, 0xa6, 8);
- os_memcpy(r, plain, 8 * n);
-
- ctx = aes_encrypt_init(kek, 16);
- if (ctx == NULL)
- return -1;
-
- /* 2) Calculate intermediate values.
- * For j = 0 to 5
- * For i=1 to n
- * B = AES(K, A | R[i])
- * A = MSB(64, B) ^ t where t = (n*j)+i
- * R[i] = LSB(64, B)
- */
- for (j = 0; j <= 5; j++) {
- r = cipher + 8;
- for (i = 1; i <= n; i++) {
- os_memcpy(b, a, 8);
- os_memcpy(b + 8, r, 8);
- aes_encrypt(ctx, b, b);
- os_memcpy(a, b, 8);
- a[7] ^= n * j + i;
- os_memcpy(r, b + 8, 8);
- r += 8;
- }
- }
- aes_encrypt_deinit(ctx);
-
- /* 3) Output the results.
- *
- * These are already in @cipher due to the location of temporary
- * variables.
- */
-
- return 0;
-}
-
-#endif /* CONFIG_NO_AES_WRAP */
-
-
-#ifndef CONFIG_NO_AES_UNWRAP
-
-/**
- * aes_unwrap - Unwrap key with AES Key Wrap Algorithm (128-bit KEK) (RFC3394)
- * @kek: Key encryption key (KEK)
- * @n: Length of the plaintext key in 64-bit units; e.g., 2 = 128-bit = 16
- * bytes
- * @cipher: Wrapped key to be unwrapped, (n + 1) * 64 bits
- * @plain: Plaintext key, n * 64 bits
- * Returns: 0 on success, -1 on failure (e.g., integrity verification failed)
- */
-int aes_unwrap(const u8 *kek, int n, const u8 *cipher, u8 *plain)
-{
- u8 a[8], *r, b[16];
- int i, j;
- void *ctx;
-
- /* 1) Initialize variables. */
- os_memcpy(a, cipher, 8);
- r = plain;
- os_memcpy(r, cipher + 8, 8 * n);
-
- ctx = aes_decrypt_init(kek, 16);
- if (ctx == NULL)
- return -1;
-
- /* 2) Compute intermediate values.
- * For j = 5 to 0
- * For i = n to 1
- * B = AES-1(K, (A ^ t) | R[i]) where t = n*j+i
- * A = MSB(64, B)
- * R[i] = LSB(64, B)
- */
- for (j = 5; j >= 0; j--) {
- r = plain + (n - 1) * 8;
- for (i = n; i >= 1; i--) {
- os_memcpy(b, a, 8);
- b[7] ^= n * j + i;
-
- os_memcpy(b + 8, r, 8);
- aes_decrypt(ctx, b, b);
- os_memcpy(a, b, 8);
- os_memcpy(r, b + 8, 8);
- r -= 8;
- }
- }
- aes_decrypt_deinit(ctx);
-
- /* 3) Output results.
- *
- * These are already in @plain due to the location of temporary
- * variables. Just verify that the IV matches with the expected value.
- */
- for (i = 0; i < 8; i++) {
- if (a[i] != 0xa6)
- return -1;
- }
-
- return 0;
-}
-
-#endif /* CONFIG_NO_AES_UNWRAP */
-
-
-#define BLOCK_SIZE 16
-
-#ifndef CONFIG_NO_AES_OMAC1
-
-static void gf_mulx(u8 *pad)
-{
- int i, carry;
-
- carry = pad[0] & 0x80;
- for (i = 0; i < BLOCK_SIZE - 1; i++)
- pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7);
- pad[BLOCK_SIZE - 1] <<= 1;
- if (carry)
- pad[BLOCK_SIZE - 1] ^= 0x87;
-}
-
-
-/**
- * omac1_aes_128_vector - One-Key CBC MAC (OMAC1) hash with AES-128
- * @key: 128-bit key for the hash operation
- * @num_elem: Number of elements in the data vector
- * @addr: Pointers to the data areas
- * @len: Lengths of the data blocks
- * @mac: Buffer for MAC (128 bits, i.e., 16 bytes)
- * Returns: 0 on success, -1 on failure
- *
- * This is a mode for using block cipher (AES in this case) for authentication.
- * OMAC1 was standardized with the name CMAC by NIST in a Special Publication
- * (SP) 800-38B.
- */
-int omac1_aes_128_vector(const u8 *key, size_t num_elem,
- const u8 *addr[], const size_t *len, u8 *mac)
-{
- void *ctx;
- u8 cbc[BLOCK_SIZE], pad[BLOCK_SIZE];
- const u8 *pos, *end;
- size_t i, e, left, total_len;
-
- ctx = aes_encrypt_init(key, 16);
- if (ctx == NULL)
- return -1;
- os_memset(cbc, 0, BLOCK_SIZE);
-
- total_len = 0;
- for (e = 0; e < num_elem; e++)
- total_len += len[e];
- left = total_len;
-
- e = 0;
- pos = addr[0];
- end = pos + len[0];
-
- while (left >= BLOCK_SIZE) {
- for (i = 0; i < BLOCK_SIZE; i++) {
- cbc[i] ^= *pos++;
- if (pos >= end) {
- e++;
- pos = addr[e];
- end = pos + len[e];
- }
- }
- if (left > BLOCK_SIZE)
- aes_encrypt(ctx, cbc, cbc);
- left -= BLOCK_SIZE;
- }
-
- os_memset(pad, 0, BLOCK_SIZE);
- aes_encrypt(ctx, pad, pad);
- gf_mulx(pad);
-
- if (left || total_len == 0) {
- for (i = 0; i < left; i++) {
- cbc[i] ^= *pos++;
- if (pos >= end) {
- e++;
- pos = addr[e];
- end = pos + len[e];
- }
- }
- cbc[left] ^= 0x80;
- gf_mulx(pad);
- }
-
- for (i = 0; i < BLOCK_SIZE; i++)
- pad[i] ^= cbc[i];
- aes_encrypt(ctx, pad, mac);
- aes_encrypt_deinit(ctx);
- return 0;
-}
-
-
-/**
- * omac1_aes_128 - One-Key CBC MAC (OMAC1) hash with AES-128 (aka AES-CMAC)
- * @key: 128-bit key for the hash operation
- * @data: Data buffer for which a MAC is determined
- * @data_len: Length of data buffer in bytes
- * @mac: Buffer for MAC (128 bits, i.e., 16 bytes)
- * Returns: 0 on success, -1 on failure
- *
- * This is a mode for using block cipher (AES in this case) for authentication.
- * OMAC1 was standardized with the name CMAC by NIST in a Special Publication
- * (SP) 800-38B.
- */
-int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac)
-{
- return omac1_aes_128_vector(key, 1, &data, &data_len, mac);
-}
-
-#endif /* CONFIG_NO_AES_OMAC1 */
-
-
-#ifndef CONFIG_NO_AES_ENCRYPT_BLOCK
-/**
- * aes_128_encrypt_block - Perform one AES 128-bit block operation
- * @key: Key for AES
- * @in: Input data (16 bytes)
- * @out: Output of the AES block operation (16 bytes)
- * Returns: 0 on success, -1 on failure
- */
-int aes_128_encrypt_block(const u8 *key, const u8 *in, u8 *out)
-{
- void *ctx;
- ctx = aes_encrypt_init(key, 16);
- if (ctx == NULL)
- return -1;
- aes_encrypt(ctx, in, out);
- aes_encrypt_deinit(ctx);
- return 0;
-}
-#endif /* CONFIG_NO_AES_ENCRYPT_BLOCK */
-
-
-#ifndef CONFIG_NO_AES_CTR
-
-/**
- * aes_128_ctr_encrypt - AES-128 CTR mode encryption
- * @key: Key for encryption (16 bytes)
- * @nonce: Nonce for counter mode (16 bytes)
- * @data: Data to encrypt in-place
- * @data_len: Length of data in bytes
- * Returns: 0 on success, -1 on failure
- */
-int aes_128_ctr_encrypt(const u8 *key, const u8 *nonce,
- u8 *data, size_t data_len)
-{
- void *ctx;
- size_t j, len, left = data_len;
- int i;
- u8 *pos = data;
- u8 counter[BLOCK_SIZE], buf[BLOCK_SIZE];
-
- ctx = aes_encrypt_init(key, 16);
- if (ctx == NULL)
- return -1;
- os_memcpy(counter, nonce, BLOCK_SIZE);
-
- while (left > 0) {
- aes_encrypt(ctx, counter, buf);
-
- len = (left < BLOCK_SIZE) ? left : BLOCK_SIZE;
- for (j = 0; j < len; j++)
- pos[j] ^= buf[j];
- pos += len;
- left -= len;
-
- for (i = BLOCK_SIZE - 1; i >= 0; i--) {
- counter[i]++;
- if (counter[i])
- break;
- }
- }
- aes_encrypt_deinit(ctx);
- return 0;
-}
-
-#endif /* CONFIG_NO_AES_CTR */
-
-
-#ifndef CONFIG_NO_AES_EAX
-
-/**
- * aes_128_eax_encrypt - AES-128 EAX mode encryption
- * @key: Key for encryption (16 bytes)
- * @nonce: Nonce for counter mode
- * @nonce_len: Nonce length in bytes
- * @hdr: Header data to be authenticity protected
- * @hdr_len: Length of the header data bytes
- * @data: Data to encrypt in-place
- * @data_len: Length of data in bytes
- * @tag: 16-byte tag value
- * Returns: 0 on success, -1 on failure
- */
-int aes_128_eax_encrypt(const u8 *key, const u8 *nonce, size_t nonce_len,
- const u8 *hdr, size_t hdr_len,
- u8 *data, size_t data_len, u8 *tag)
-{
- u8 *buf;
- size_t buf_len;
- u8 nonce_mac[BLOCK_SIZE], hdr_mac[BLOCK_SIZE], data_mac[BLOCK_SIZE];
- int i, ret = -1;
-
- if (nonce_len > data_len)
- buf_len = nonce_len;
- else
- buf_len = data_len;
- if (hdr_len > buf_len)
- buf_len = hdr_len;
- buf_len += 16;
-
- buf = os_malloc(buf_len);
- if (buf == NULL)
- return -1;
-
- os_memset(buf, 0, 15);
-
- buf[15] = 0;
- os_memcpy(buf + 16, nonce, nonce_len);
- if (omac1_aes_128(key, buf, 16 + nonce_len, nonce_mac))
- goto fail;
-
- buf[15] = 1;
- os_memcpy(buf + 16, hdr, hdr_len);
- if (omac1_aes_128(key, buf, 16 + hdr_len, hdr_mac))
- goto fail;
-
- if (aes_128_ctr_encrypt(key, nonce_mac, data, data_len))
- goto fail;
- buf[15] = 2;
- os_memcpy(buf + 16, data, data_len);
- if (omac1_aes_128(key, buf, 16 + data_len, data_mac))
- goto fail;
-
- for (i = 0; i < BLOCK_SIZE; i++)
- tag[i] = nonce_mac[i] ^ data_mac[i] ^ hdr_mac[i];
-
- ret = 0;
-fail:
- os_free(buf);
-
- return ret;
-}
-
-
-/**
- * aes_128_eax_decrypt - AES-128 EAX mode decryption
- * @key: Key for decryption (16 bytes)
- * @nonce: Nonce for counter mode
- * @nonce_len: Nonce length in bytes
- * @hdr: Header data to be authenticity protected
- * @hdr_len: Length of the header data bytes
- * @data: Data to encrypt in-place
- * @data_len: Length of data in bytes
- * @tag: 16-byte tag value
- * Returns: 0 on success, -1 on failure, -2 if tag does not match
- */
-int aes_128_eax_decrypt(const u8 *key, const u8 *nonce, size_t nonce_len,
- const u8 *hdr, size_t hdr_len,
- u8 *data, size_t data_len, const u8 *tag)
-{
- u8 *buf;
- size_t buf_len;
- u8 nonce_mac[BLOCK_SIZE], hdr_mac[BLOCK_SIZE], data_mac[BLOCK_SIZE];
- int i;
-
- if (nonce_len > data_len)
- buf_len = nonce_len;
- else
- buf_len = data_len;
- if (hdr_len > buf_len)
- buf_len = hdr_len;
- buf_len += 16;
-
- buf = os_malloc(buf_len);
- if (buf == NULL)
- return -1;
-
- os_memset(buf, 0, 15);
-
- buf[15] = 0;
- os_memcpy(buf + 16, nonce, nonce_len);
- if (omac1_aes_128(key, buf, 16 + nonce_len, nonce_mac)) {
- os_free(buf);
- return -1;
- }
-
- buf[15] = 1;
- os_memcpy(buf + 16, hdr, hdr_len);
- if (omac1_aes_128(key, buf, 16 + hdr_len, hdr_mac)) {
- os_free(buf);
- return -1;
- }
-
- buf[15] = 2;
- os_memcpy(buf + 16, data, data_len);
- if (omac1_aes_128(key, buf, 16 + data_len, data_mac)) {
- os_free(buf);
- return -1;
- }
-
- os_free(buf);
-
- for (i = 0; i < BLOCK_SIZE; i++) {
- if (tag[i] != (nonce_mac[i] ^ data_mac[i] ^ hdr_mac[i]))
- return -2;
- }
-
- return aes_128_ctr_encrypt(key, nonce_mac, data, data_len);
-}
-
-#endif /* CONFIG_NO_AES_EAX */
-
-
-#ifndef CONFIG_NO_AES_CBC
-
-/**
- * aes_128_cbc_encrypt - AES-128 CBC encryption
- * @key: Encryption key
- * @iv: Encryption IV for CBC mode (16 bytes)
- * @data: Data to encrypt in-place
- * @data_len: Length of data in bytes (must be divisible by 16)
- * Returns: 0 on success, -1 on failure
- */
-int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len)
-{
- void *ctx;
- u8 cbc[BLOCK_SIZE];
- u8 *pos = data;
- int i, j, blocks;
-
- ctx = aes_encrypt_init(key, 16);
- if (ctx == NULL)
- return -1;
- os_memcpy(cbc, iv, BLOCK_SIZE);
-
- blocks = data_len / BLOCK_SIZE;
- for (i = 0; i < blocks; i++) {
- for (j = 0; j < BLOCK_SIZE; j++)
- cbc[j] ^= pos[j];
- aes_encrypt(ctx, cbc, cbc);
- os_memcpy(pos, cbc, BLOCK_SIZE);
- pos += BLOCK_SIZE;
- }
- aes_encrypt_deinit(ctx);
- return 0;
-}
-
-
-/**
- * aes_128_cbc_decrypt - AES-128 CBC decryption
- * @key: Decryption key
- * @iv: Decryption IV for CBC mode (16 bytes)
- * @data: Data to decrypt in-place
- * @data_len: Length of data in bytes (must be divisible by 16)
- * Returns: 0 on success, -1 on failure
- */
-int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len)
-{
- void *ctx;
- u8 cbc[BLOCK_SIZE], tmp[BLOCK_SIZE];
- u8 *pos = data;
- int i, j, blocks;
-
- ctx = aes_decrypt_init(key, 16);
- if (ctx == NULL)
- return -1;
- os_memcpy(cbc, iv, BLOCK_SIZE);
-
- blocks = data_len / BLOCK_SIZE;
- for (i = 0; i < blocks; i++) {
- os_memcpy(tmp, pos, BLOCK_SIZE);
- aes_decrypt(ctx, pos, pos);
- for (j = 0; j < BLOCK_SIZE; j++)
- pos[j] ^= cbc[j];
- os_memcpy(cbc, tmp, BLOCK_SIZE);
- pos += BLOCK_SIZE;
- }
- aes_decrypt_deinit(ctx);
- return 0;
-}
-
-#endif /* CONFIG_NO_AES_CBC */