/*
- * AES-128 CTR
+ * AES-128/192/256 CTR
*
* Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
*
#include "aes_wrap.h"
/**
- * aes_128_ctr_encrypt - AES-128 CTR mode encryption
- * @key: Key for encryption (16 bytes)
+ * aes_ctr_encrypt - AES-128/192/256 CTR mode encryption
+ * @key: Key for encryption (key_len bytes)
+ * @key_len: Length of the key (16, 24, or 32 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)
+int aes_ctr_encrypt(const u8 *key, size_t key_len, const u8 *nonce,
+ u8 *data, size_t data_len)
{
void *ctx;
size_t j, len, left = data_len;
u8 *pos = data;
u8 counter[AES_BLOCK_SIZE], buf[AES_BLOCK_SIZE];
- ctx = aes_encrypt_init(key, 16);
+ ctx = aes_encrypt_init(key, key_len);
if (ctx == NULL)
return -1;
os_memcpy(counter, nonce, AES_BLOCK_SIZE);
aes_encrypt_deinit(ctx);
return 0;
}
+
+
+/**
+ * aes_128_ctr_encrypt - AES-128 CTR mode encryption
+ * @key: Key for encryption (key_len 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)
+{
+ return aes_ctr_encrypt(key, 16, nonce, data, data_len);
+}
}
-static int aes_s2v(const u8 *key, size_t num_elem, const u8 *addr[],
- size_t *len, u8 *mac)
+static int aes_s2v(const u8 *key, size_t key_len,
+ size_t num_elem, const u8 *addr[], size_t *len, u8 *mac)
{
u8 tmp[AES_BLOCK_SIZE], tmp2[AES_BLOCK_SIZE];
u8 *buf = NULL;
int ret;
size_t i;
+ const u8 *data[1];
+ size_t data_len[1];
if (!num_elem) {
os_memcpy(tmp, zero, sizeof(zero));
tmp[AES_BLOCK_SIZE - 1] = 1;
- return omac1_aes_128(key, tmp, sizeof(tmp), mac);
+ data[0] = tmp;
+ data_len[0] = sizeof(tmp);
+ return omac1_aes_vector(key, key_len, 1, data, data_len, mac);
}
- ret = omac1_aes_128(key, zero, sizeof(zero), tmp);
+ data[0] = zero;
+ data_len[0] = sizeof(zero);
+ ret = omac1_aes_vector(key, key_len, 1, data, data_len, tmp);
if (ret)
return ret;
for (i = 0; i < num_elem - 1; i++) {
- ret = omac1_aes_128(key, addr[i], len[i], tmp2);
+ ret = omac1_aes_vector(key, key_len, 1, &addr[i], &len[i],
+ tmp2);
if (ret)
return ret;
os_memcpy(buf, addr[i], len[i]);
xorend(buf, len[i], tmp, AES_BLOCK_SIZE);
- ret = omac1_aes_128(key, buf, len[i], mac);
+ data[0] = buf;
+ ret = omac1_aes_vector(key, key_len, 1, data, &len[i], mac);
bin_clear_free(buf, len[i]);
return ret;
}
pad_block(tmp2, addr[i], len[i]);
xor(tmp, tmp2);
- return omac1_aes_128(key, tmp, sizeof(tmp), mac);
+ data[0] = tmp;
+ data_len[0] = sizeof(tmp);
+ return omac1_aes_vector(key, key_len, 1, data, data_len, mac);
}
-int aes_siv_encrypt(const u8 *key, const u8 *pw,
- size_t pwlen, size_t num_elem,
- const u8 *addr[], const size_t *len, u8 *out)
+int aes_siv_encrypt(const u8 *key, size_t key_len,
+ const u8 *pw, size_t pwlen,
+ size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *out)
{
const u8 *_addr[6];
size_t _len[6];
- const u8 *k1 = key, *k2 = key + 16;
+ const u8 *k1, *k2;
u8 v[AES_BLOCK_SIZE];
size_t i;
u8 *iv, *crypt_pw;
- if (num_elem > ARRAY_SIZE(_addr) - 1)
+ if (num_elem > ARRAY_SIZE(_addr) - 1 ||
+ (key_len != 32 && key_len != 48 && key_len != 64))
return -1;
+ key_len /= 2;
+ k1 = key;
+ k2 = key + key_len;
+
for (i = 0; i < num_elem; i++) {
_addr[i] = addr[i];
_len[i] = len[i];
_addr[num_elem] = pw;
_len[num_elem] = pwlen;
- if (aes_s2v(k1, num_elem + 1, _addr, _len, v))
+ if (aes_s2v(k1, key_len, num_elem + 1, _addr, _len, v))
return -1;
iv = out;
/* zero out 63rd and 31st bits of ctr (from right) */
v[8] &= 0x7f;
v[12] &= 0x7f;
- return aes_128_ctr_encrypt(k2, v, crypt_pw, pwlen);
+ return aes_ctr_encrypt(k2, key_len, v, crypt_pw, pwlen);
}
-int aes_siv_decrypt(const u8 *key, const u8 *iv_crypt, size_t iv_c_len,
+int aes_siv_decrypt(const u8 *key, size_t key_len,
+ const u8 *iv_crypt, size_t iv_c_len,
size_t num_elem, const u8 *addr[], const size_t *len,
u8 *out)
{
const u8 *_addr[6];
size_t _len[6];
- const u8 *k1 = key, *k2 = key + 16;
+ const u8 *k1, *k2;
size_t crypt_len;
size_t i;
int ret;
u8 iv[AES_BLOCK_SIZE];
u8 check[AES_BLOCK_SIZE];
- if (iv_c_len < AES_BLOCK_SIZE || num_elem > ARRAY_SIZE(_addr) - 1)
+ if (iv_c_len < AES_BLOCK_SIZE || num_elem > ARRAY_SIZE(_addr) - 1 ||
+ (key_len != 32 && key_len != 48 && key_len != 64))
return -1;
crypt_len = iv_c_len - AES_BLOCK_SIZE;
+ key_len /= 2;
+ k1 = key;
+ k2 = key + key_len;
for (i = 0; i < num_elem; i++) {
_addr[i] = addr[i];
iv[8] &= 0x7f;
iv[12] &= 0x7f;
- ret = aes_128_ctr_encrypt(k2, iv, out, crypt_len);
+ ret = aes_ctr_encrypt(k2, key_len, iv, out, crypt_len);
if (ret)
return ret;
- ret = aes_s2v(k1, num_elem + 1, _addr, _len, check);
+ ret = aes_s2v(k1, key_len, num_elem + 1, _addr, _len, check);
if (ret)
return ret;
if (os_memcmp(check, iv_crypt, AES_BLOCK_SIZE) == 0)
#ifndef AES_SIV_H
#define AES_SIV_H
-int aes_siv_encrypt(const u8 *key, const u8 *pw,
- size_t pwlen, size_t num_elem,
- const u8 *addr[], const size_t *len, u8 *out);
-int aes_siv_decrypt(const u8 *key, const u8 *iv_crypt, size_t iv_c_len,
+int aes_siv_encrypt(const u8 *key, size_t key_len,
+ const u8 *pw, size_t pwlen,
+ size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *out);
+int aes_siv_decrypt(const u8 *key, size_t key_len,
+ const u8 *iv_crypt, size_t iv_c_len,
size_t num_elem, const u8 *addr[], const size_t *len,
u8 *out);
*
* - AES Key Wrap Algorithm (RFC3394)
* - One-Key CBC MAC (OMAC1) hash with AES-128 and AES-256
- * - AES-128 CTR mode encryption
+ * - AES-128/192/256 CTR mode encryption
* - AES-128 EAX mode encryption/decryption
* - AES-128 CBC
* - AES-GCM
int __must_check omac1_aes_256(const u8 *key, const u8 *data, size_t data_len,
u8 *mac);
int __must_check aes_128_encrypt_block(const u8 *key, const u8 *in, u8 *out);
+int __must_check aes_ctr_encrypt(const u8 *key, size_t key_len, const u8 *nonce,
+ u8 *data, size_t data_len);
int __must_check aes_128_ctr_encrypt(const u8 *key, const u8 *nonce,
u8 *data, size_t data_len);
int __must_check aes_128_eax_encrypt(const u8 *key,
addr[0] = ad;
len[0] = sizeof(ad);
- if (aes_siv_encrypt(key, plaintext, sizeof(plaintext),
+ if (aes_siv_encrypt(key, sizeof(key), plaintext, sizeof(plaintext),
1, addr, len, out)) {
wpa_printf(MSG_ERROR, "AES-SIV mode encryption failed");
return 1;
return 1;
}
- if (aes_siv_decrypt(key, iv_c, sizeof(iv_c), 1, addr, len, out)) {
+ if (aes_siv_decrypt(key, sizeof(key), iv_c, sizeof(iv_c),
+ 1, addr, len, out)) {
wpa_printf(MSG_ERROR, "AES-SIV mode decryption failed");
return 1;
}
addr[2] = nonce_2;
len[2] = sizeof(nonce_2);
- if (aes_siv_encrypt(key_2, plaintext_2, sizeof(plaintext_2),
+ if (aes_siv_encrypt(key_2, sizeof(key_2),
+ plaintext_2, sizeof(plaintext_2),
3, addr, len, out)) {
wpa_printf(MSG_ERROR, "AES-SIV mode encryption failed");
return 1;
return 1;
}
- if (aes_siv_decrypt(key_2, iv_c_2, sizeof(iv_c_2), 3, addr, len, out)) {
+ if (aes_siv_decrypt(key_2, sizeof(key_2), iv_c_2, sizeof(iv_c_2),
+ 3, addr, len, out)) {
wpa_printf(MSG_ERROR, "AES-SIV mode decryption failed");
return 1;
}
/* encrypt after MIC */
mic_payload = wpabuf_put(buf, 2 + len + AES_BLOCK_SIZE);
- if (aes_siv_encrypt(sta->aek, ampe_ie, 2 + len, 3,
+ if (aes_siv_encrypt(sta->aek, sizeof(sta->aek), ampe_ie, 2 + len, 3,
aad, aad_len, mic_payload)) {
wpa_printf(MSG_ERROR, "protect frame: failed to encrypt");
ret = -ENOMEM;
os_memcpy(crypt, elems->mic, crypt_len);
- if (aes_siv_decrypt(sta->aek, crypt, crypt_len, 3,
+ if (aes_siv_decrypt(sta->aek, sizeof(sta->aek), crypt, crypt_len, 3,
aad, aad_len, ampe_buf)) {
wpa_printf(MSG_ERROR, "Mesh RSN: frame verification failed!");
ret = -2;