diff options
Diffstat (limited to 'contrib/hostapd/aes_wrap.c')
-rw-r--r-- | contrib/hostapd/aes_wrap.c | 377 |
1 files changed, 62 insertions, 315 deletions
diff --git a/contrib/hostapd/aes_wrap.c b/contrib/hostapd/aes_wrap.c index a5925ca..c52e45a 100644 --- a/contrib/hostapd/aes_wrap.c +++ b/contrib/hostapd/aes_wrap.c @@ -7,7 +7,7 @@ * - AES-128 EAX mode encryption/decryption * - AES-128 CBC * - * Copyright (c) 2003-2005, Jouni Malinen <jkmaline@cc.hut.fi> + * Copyright (c) 2003-2005, 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 @@ -19,17 +19,18 @@ * See README and COPYING for more details. */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> +#include "includes.h" + #include "common.h" #include "aes_wrap.h" #include "crypto.h" -#ifndef EAP_TLS_FUNCS +#ifdef INTERNAL_AES #include "aes.c" -#endif /* EAP_TLS_FUNCS */ +#endif /* INTERNAL_AES */ + +#ifndef CONFIG_NO_AES_WRAP /** * aes_wrap - Wrap keys with AES Key Wrap Algorithm (128-bit KEK) (RFC3394) @@ -49,8 +50,8 @@ int aes_wrap(const u8 *kek, int n, const u8 *plain, u8 *cipher) r = cipher + 8; /* 1) Initialize variables. */ - memset(a, 0xa6, 8); - memcpy(r, plain, 8 * n); + os_memset(a, 0xa6, 8); + os_memcpy(r, plain, 8 * n); ctx = aes_encrypt_init(kek, 16); if (ctx == NULL) @@ -66,12 +67,12 @@ int aes_wrap(const u8 *kek, int n, const u8 *plain, u8 *cipher) for (j = 0; j <= 5; j++) { r = cipher + 8; for (i = 1; i <= n; i++) { - memcpy(b, a, 8); - memcpy(b + 8, r, 8); + os_memcpy(b, a, 8); + os_memcpy(b + 8, r, 8); aes_encrypt(ctx, b, b); - memcpy(a, b, 8); + os_memcpy(a, b, 8); a[7] ^= n * j + i; - memcpy(r, b + 8, 8); + os_memcpy(r, b + 8, 8); r += 8; } } @@ -86,6 +87,8 @@ int aes_wrap(const u8 *kek, int n, const u8 *plain, u8 *cipher) return 0; } +#endif /* CONFIG_NO_AES_WRAP */ + /** * aes_unwrap - Unwrap key with AES Key Wrap Algorithm (128-bit KEK) (RFC3394) @@ -102,9 +105,9 @@ int aes_unwrap(const u8 *kek, int n, const u8 *cipher, u8 *plain) void *ctx; /* 1) Initialize variables. */ - memcpy(a, cipher, 8); + os_memcpy(a, cipher, 8); r = plain; - memcpy(r, cipher + 8, 8 * n); + os_memcpy(r, cipher + 8, 8 * n); ctx = aes_decrypt_init(kek, 16); if (ctx == NULL) @@ -120,13 +123,13 @@ int aes_unwrap(const u8 *kek, int n, const u8 *cipher, u8 *plain) for (j = 5; j >= 0; j--) { r = plain + (n - 1) * 8; for (i = n; i >= 1; i--) { - memcpy(b, a, 8); + os_memcpy(b, a, 8); b[7] ^= n * j + i; - memcpy(b + 8, r, 8); + os_memcpy(b + 8, r, 8); aes_decrypt(ctx, b, b); - memcpy(a, b, 8); - memcpy(r, b + 8, 8); + os_memcpy(a, b, 8); + os_memcpy(r, b + 8, 8); r -= 8; } } @@ -148,6 +151,8 @@ int aes_unwrap(const u8 *kek, int n, const u8 *cipher, u8 *plain) #define BLOCK_SIZE 16 +#ifndef CONFIG_NO_AES_OMAC1 + static void gf_mulx(u8 *pad) { int i, carry; @@ -162,8 +167,8 @@ static void gf_mulx(u8 *pad) /** - * omac1_aes_128 - One-Key CBC MAC (OMAC1) hash with AES-128 - * @key: Key for the hash operation + * 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: Length of data buffer in bytes * @mac: Buffer for MAC (128 bits, i.e., 16 bytes) @@ -174,13 +179,12 @@ int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) void *ctx; u8 cbc[BLOCK_SIZE], pad[BLOCK_SIZE]; const u8 *pos = data; - int i; - size_t left = data_len; + size_t i, left = data_len; ctx = aes_encrypt_init(key, 16); if (ctx == NULL) return -1; - memset(cbc, 0, BLOCK_SIZE); + os_memset(cbc, 0, BLOCK_SIZE); while (left >= BLOCK_SIZE) { for (i = 0; i < BLOCK_SIZE; i++) @@ -190,7 +194,7 @@ int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) left -= BLOCK_SIZE; } - memset(pad, 0, BLOCK_SIZE); + os_memset(pad, 0, BLOCK_SIZE); aes_encrypt(ctx, pad, pad); gf_mulx(pad); @@ -208,6 +212,8 @@ int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) return 0; } +#endif /* CONFIG_NO_AES_OMAC1 */ + /** * aes_128_encrypt_block - Perform one AES 128-bit block operation @@ -228,6 +234,8 @@ int aes_128_encrypt_block(const u8 *key, const u8 *in, u8 *out) } +#ifndef CONFIG_NO_AES_CTR + /** * aes_128_ctr_encrypt - AES-128 CTR mode encryption * @key: Key for encryption (16 bytes) @@ -240,7 +248,7 @@ int aes_128_ctr_encrypt(const u8 *key, const u8 *nonce, u8 *data, size_t data_len) { void *ctx; - size_t len, left = data_len; + size_t j, len, left = data_len; int i; u8 *pos = data; u8 counter[BLOCK_SIZE], buf[BLOCK_SIZE]; @@ -248,14 +256,14 @@ int aes_128_ctr_encrypt(const u8 *key, const u8 *nonce, ctx = aes_encrypt_init(key, 16); if (ctx == NULL) return -1; - memcpy(counter, nonce, BLOCK_SIZE); + os_memcpy(counter, nonce, BLOCK_SIZE); while (left > 0) { aes_encrypt(ctx, counter, buf); len = (left < BLOCK_SIZE) ? left : BLOCK_SIZE; - for (i = 0; i < len; i++) - pos[i] ^= buf[i]; + for (j = 0; j < len; j++) + pos[j] ^= buf[j]; pos += len; left -= len; @@ -269,6 +277,10 @@ int aes_128_ctr_encrypt(const u8 *key, const u8 *nonce, return 0; } +#endif /* CONFIG_NO_AES_CTR */ + + +#ifndef CONFIG_NO_AES_EAX /** * aes_128_eax_encrypt - AES-128 EAX mode encryption @@ -299,26 +311,26 @@ int aes_128_eax_encrypt(const u8 *key, const u8 *nonce, size_t nonce_len, buf_len = hdr_len; buf_len += 16; - buf = malloc(buf_len); + buf = os_malloc(buf_len); if (buf == NULL) return -1; - memset(buf, 0, 15); + os_memset(buf, 0, 15); buf[15] = 0; - memcpy(buf + 16, nonce, nonce_len); + os_memcpy(buf + 16, nonce, nonce_len); omac1_aes_128(key, buf, 16 + nonce_len, nonce_mac); buf[15] = 1; - memcpy(buf + 16, hdr, hdr_len); + os_memcpy(buf + 16, hdr, hdr_len); omac1_aes_128(key, buf, 16 + hdr_len, hdr_mac); aes_128_ctr_encrypt(key, nonce_mac, data, data_len); buf[15] = 2; - memcpy(buf + 16, data, data_len); + os_memcpy(buf + 16, data, data_len); omac1_aes_128(key, buf, 16 + data_len, data_mac); - free(buf); + os_free(buf); for (i = 0; i < BLOCK_SIZE; i++) tag[i] = nonce_mac[i] ^ data_mac[i] ^ hdr_mac[i]; @@ -356,25 +368,25 @@ int aes_128_eax_decrypt(const u8 *key, const u8 *nonce, size_t nonce_len, buf_len = hdr_len; buf_len += 16; - buf = malloc(buf_len); + buf = os_malloc(buf_len); if (buf == NULL) return -1; - memset(buf, 0, 15); + os_memset(buf, 0, 15); buf[15] = 0; - memcpy(buf + 16, nonce, nonce_len); + os_memcpy(buf + 16, nonce, nonce_len); omac1_aes_128(key, buf, 16 + nonce_len, nonce_mac); buf[15] = 1; - memcpy(buf + 16, hdr, hdr_len); + os_memcpy(buf + 16, hdr, hdr_len); omac1_aes_128(key, buf, 16 + hdr_len, hdr_mac); buf[15] = 2; - memcpy(buf + 16, data, data_len); + os_memcpy(buf + 16, data, data_len); omac1_aes_128(key, buf, 16 + data_len, data_mac); - free(buf); + os_free(buf); for (i = 0; i < BLOCK_SIZE; i++) { if (tag[i] != (nonce_mac[i] ^ data_mac[i] ^ hdr_mac[i])) @@ -386,6 +398,10 @@ int aes_128_eax_decrypt(const u8 *key, const u8 *nonce, size_t nonce_len, return 0; } +#endif /* CONFIG_NO_AES_EAX */ + + +#ifndef CONFIG_NO_AES_CBC /** * aes_128_cbc_encrypt - AES-128 CBC encryption @@ -405,14 +421,14 @@ int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) ctx = aes_encrypt_init(key, 16); if (ctx == NULL) return -1; - memcpy(cbc, iv, BLOCK_SIZE); + 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); - memcpy(pos, cbc, BLOCK_SIZE); + os_memcpy(pos, cbc, BLOCK_SIZE); pos += BLOCK_SIZE; } aes_encrypt_deinit(ctx); @@ -438,288 +454,19 @@ int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) ctx = aes_decrypt_init(key, 16); if (ctx == NULL) return -1; - memcpy(cbc, iv, BLOCK_SIZE); + os_memcpy(cbc, iv, BLOCK_SIZE); blocks = data_len / BLOCK_SIZE; for (i = 0; i < blocks; i++) { - memcpy(tmp, pos, BLOCK_SIZE); + os_memcpy(tmp, pos, BLOCK_SIZE); aes_decrypt(ctx, pos, pos); for (j = 0; j < BLOCK_SIZE; j++) pos[j] ^= cbc[j]; - memcpy(cbc, tmp, BLOCK_SIZE); + os_memcpy(cbc, tmp, BLOCK_SIZE); pos += BLOCK_SIZE; } aes_decrypt_deinit(ctx); return 0; } - -#ifdef TEST_MAIN - -#ifdef __i386__ -#define rdtscll(val) \ - __asm__ __volatile__("rdtsc" : "=A" (val)) - -static void test_aes_perf(void) -{ - const int num_iters = 10; - int i; - unsigned int start, end; - u8 key[16], pt[16], ct[16]; - void *ctx; - - printf("keySetupEnc:"); - for (i = 0; i < num_iters; i++) { - rdtscll(start); - ctx = aes_encrypt_init(key, 16); - rdtscll(end); - aes_encrypt_deinit(ctx); - printf(" %d", end - start); - } - printf("\n"); - - printf("Encrypt:"); - ctx = aes_encrypt_init(key, 16); - for (i = 0; i < num_iters; i++) { - rdtscll(start); - aes_encrypt(ctx, pt, ct); - rdtscll(end); - printf(" %d", end - start); - } - aes_encrypt_deinit(ctx); - printf("\n"); -} -#endif /* __i386__ */ - - -static int test_eax(void) -{ - u8 msg[] = { 0xF7, 0xFB }; - u8 key[] = { 0x91, 0x94, 0x5D, 0x3F, 0x4D, 0xCB, 0xEE, 0x0B, - 0xF4, 0x5E, 0xF5, 0x22, 0x55, 0xF0, 0x95, 0xA4 }; - u8 nonce[] = { 0xBE, 0xCA, 0xF0, 0x43, 0xB0, 0xA2, 0x3D, 0x84, - 0x31, 0x94, 0xBA, 0x97, 0x2C, 0x66, 0xDE, 0xBD }; - u8 hdr[] = { 0xFA, 0x3B, 0xFD, 0x48, 0x06, 0xEB, 0x53, 0xFA }; - u8 cipher[] = { 0x19, 0xDD, 0x5C, 0x4C, 0x93, 0x31, 0x04, 0x9D, - 0x0B, 0xDA, 0xB0, 0x27, 0x74, 0x08, 0xF6, 0x79, - 0x67, 0xE5 }; - u8 data[sizeof(msg)], tag[BLOCK_SIZE]; - - memcpy(data, msg, sizeof(msg)); - if (aes_128_eax_encrypt(key, nonce, sizeof(nonce), hdr, sizeof(hdr), - data, sizeof(data), tag)) { - printf("AES-128 EAX mode encryption failed\n"); - return 1; - } - if (memcmp(data, cipher, sizeof(data)) != 0) { - printf("AES-128 EAX mode encryption returned invalid cipher " - "text\n"); - return 1; - } - if (memcmp(tag, cipher + sizeof(data), BLOCK_SIZE) != 0) { - printf("AES-128 EAX mode encryption returned invalid tag\n"); - return 1; - } - - if (aes_128_eax_decrypt(key, nonce, sizeof(nonce), hdr, sizeof(hdr), - data, sizeof(data), tag)) { - printf("AES-128 EAX mode decryption failed\n"); - return 1; - } - if (memcmp(data, msg, sizeof(data)) != 0) { - printf("AES-128 EAX mode decryption returned invalid plain " - "text\n"); - return 1; - } - - return 0; -} - - -static int test_cbc(void) -{ - struct cbc_test_vector { - u8 key[16]; - u8 iv[16]; - u8 plain[32]; - u8 cipher[32]; - size_t len; - } vectors[] = { - { - { 0x06, 0xa9, 0x21, 0x40, 0x36, 0xb8, 0xa1, 0x5b, - 0x51, 0x2e, 0x03, 0xd5, 0x34, 0x12, 0x00, 0x06 }, - { 0x3d, 0xaf, 0xba, 0x42, 0x9d, 0x9e, 0xb4, 0x30, - 0xb4, 0x22, 0xda, 0x80, 0x2c, 0x9f, 0xac, 0x41 }, - "Single block msg", - { 0xe3, 0x53, 0x77, 0x9c, 0x10, 0x79, 0xae, 0xb8, - 0x27, 0x08, 0x94, 0x2d, 0xbe, 0x77, 0x18, 0x1a }, - 16 - }, - { - { 0xc2, 0x86, 0x69, 0x6d, 0x88, 0x7c, 0x9a, 0xa0, - 0x61, 0x1b, 0xbb, 0x3e, 0x20, 0x25, 0xa4, 0x5a }, - { 0x56, 0x2e, 0x17, 0x99, 0x6d, 0x09, 0x3d, 0x28, - 0xdd, 0xb3, 0xba, 0x69, 0x5a, 0x2e, 0x6f, 0x58 }, - { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, - 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, - 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, - 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, - { 0xd2, 0x96, 0xcd, 0x94, 0xc2, 0xcc, 0xcf, 0x8a, - 0x3a, 0x86, 0x30, 0x28, 0xb5, 0xe1, 0xdc, 0x0a, - 0x75, 0x86, 0x60, 0x2d, 0x25, 0x3c, 0xff, 0xf9, - 0x1b, 0x82, 0x66, 0xbe, 0xa6, 0xd6, 0x1a, 0xb1 }, - 32 - } - }; - int i, ret = 0; - u8 *buf; - - for (i = 0; i < sizeof(vectors) / sizeof(vectors[0]); i++) { - struct cbc_test_vector *tv = &vectors[i]; - buf = malloc(tv->len); - if (buf == NULL) { - ret++; - break; - } - memcpy(buf, tv->plain, tv->len); - aes_128_cbc_encrypt(tv->key, tv->iv, buf, tv->len); - if (memcmp(buf, tv->cipher, tv->len) != 0) { - printf("AES-CBC encrypt %d failed\n", i); - ret++; - } - memcpy(buf, tv->cipher, tv->len); - aes_128_cbc_decrypt(tv->key, tv->iv, buf, tv->len); - if (memcmp(buf, tv->plain, tv->len) != 0) { - printf("AES-CBC decrypt %d failed\n", i); - ret++; - } - free(buf); - } - - return ret; -} - - -/* OMAC1 AES-128 test vectors from - * http://csrc.nist.gov/CryptoToolkit/modes/proposedmodes/omac/omac-ad.pdf - */ - -struct omac1_test_vector { - u8 k[16]; - u8 msg[64]; - int msg_len; - u8 tag[16]; -}; - -static struct omac1_test_vector test_vectors[] = -{ - { - { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, - 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, - { }, - 0, - { 0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28, - 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46 } - }, - { - { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, - 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, - { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, - 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a}, - 16, - { 0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44, - 0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c } - }, - { - { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, - 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, - { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, - 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, - 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, - 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, - 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11 }, - 40, - { 0xdf, 0xa6, 0x67, 0x47, 0xde, 0x9a, 0xe6, 0x30, - 0x30, 0xca, 0x32, 0x61, 0x14, 0x97, 0xc8, 0x27 } - }, - { - { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, - 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, - { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, - 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, - 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, - 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, - 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, - 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef, - 0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, - 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 }, - 64, - { 0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92, - 0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe } - }, -}; - - -int main(int argc, char *argv[]) -{ - u8 kek[] = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, - 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f - }; - u8 plain[] = { - 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, - 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff - }; - u8 crypt[] = { - 0x1F, 0xA6, 0x8B, 0x0A, 0x81, 0x12, 0xB4, 0x47, - 0xAE, 0xF3, 0x4B, 0xD8, 0xFB, 0x5A, 0x7B, 0x82, - 0x9D, 0x3E, 0x86, 0x23, 0x71, 0xD2, 0xCF, 0xE5 - }; - u8 result[24]; - int ret = 0, i; - struct omac1_test_vector *tv; - - if (aes_wrap(kek, 2, plain, result)) { - printf("AES-WRAP-128-128 reported failure\n"); - ret++; - } - if (memcmp(result, crypt, 24) != 0) { - printf("AES-WRAP-128-128 failed\n"); - ret++; - } - if (aes_unwrap(kek, 2, crypt, result)) { - printf("AES-UNWRAP-128-128 reported failure\n"); - ret++; - } - if (memcmp(result, plain, 16) != 0) { - int i; - printf("AES-UNWRAP-128-128 failed\n"); - ret++; - for (i = 0; i < 16; i++) - printf(" %02x", result[i]); - printf("\n"); - } - -#ifdef __i386__ - test_aes_perf(); -#endif /* __i386__ */ - - for (i = 0; i < sizeof(test_vectors) / sizeof(test_vectors[0]); i++) { - tv = &test_vectors[i]; - omac1_aes_128(tv->k, tv->msg, tv->msg_len, result); - if (memcmp(result, tv->tag, 16) != 0) { - printf("OMAC1-AES-128 test vector %d failed\n", i); - ret++; - } - } - - ret += test_eax(); - - ret += test_cbc(); - - if (ret) - printf("FAILED!\n"); - - return ret; -} -#endif /* TEST_MAIN */ +#endif /* CONFIG_NO_AES_CBC */ |