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Diffstat (limited to 'src/libstrongswan/plugins/aes/aes_crypter.c')
-rw-r--r--src/libstrongswan/plugins/aes/aes_crypter.c136
1 files changed, 68 insertions, 68 deletions
diff --git a/src/libstrongswan/plugins/aes/aes_crypter.c b/src/libstrongswan/plugins/aes/aes_crypter.c
index c5b091750..10d48cf67 100644
--- a/src/libstrongswan/plugins/aes/aes_crypter.c
+++ b/src/libstrongswan/plugins/aes/aes_crypter.c
@@ -14,7 +14,7 @@
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
-
+
#include "aes_crypter.h"
/*
@@ -36,26 +36,26 @@ typedef struct private_aes_crypter_t private_aes_crypter_t;
/**
* Class implementing the AES symmetric encryption algorithm.
- *
+ *
* @ingroup crypters
*/
struct private_aes_crypter_t {
-
+
/**
* Public part of this class.
*/
aes_crypter_t public;
-
+
/**
* Number of words in the key input block.
*/
u_int32_t aes_Nkey;
-
+
/**
* The number of cipher rounds.
*/
u_int32_t aes_Nrnd;
-
+
/**
* The encryption key schedule.
*/
@@ -65,7 +65,7 @@ struct private_aes_crypter_t {
* The decryption key schedule.
*/
u_int32_t aes_d_key[AES_KS_LENGTH];
-
+
/**
* Key size of this AES cypher object.
*/
@@ -84,13 +84,13 @@ struct private_aes_crypter_t {
* is not defined, individually declared 32-bit words are used.
* 6. Define FAST_VARIABLE if a high speed variable block implementation
* is needed (essentially three separate fixed block size code sequences)
- * 7. Define either ONE_TABLE or FOUR_TABLES for a fast table driven
+ * 7. Define either ONE_TABLE or FOUR_TABLES for a fast table driven
* version using 1 table (2 kbytes of table space) or 4 tables (8
* kbytes of table space) for higher speed.
- * 8. Define either ONE_LR_TABLE or FOUR_LR_TABLES for a further speed
+ * 8. Define either ONE_LR_TABLE or FOUR_LR_TABLES for a further speed
* increase by using tables for the last rounds but with more table
* space (2 or 8 kbytes extra).
- * 9. If neither ONE_TABLE nor FOUR_TABLES is defined, a compact but
+ * 9. If neither ONE_TABLE nor FOUR_TABLES is defined, a compact but
* slower version is provided.
* 10. If fast decryption key scheduling is needed define ONE_IM_TABLE
* or FOUR_IM_TABLES for higher speed (2 or 8 kbytes extra).
@@ -131,17 +131,17 @@ struct private_aes_crypter_t {
#if defined(AES_BLOCK_SIZE) && AES_BLOCK_SIZE != 16 && AES_BLOCK_SIZE != 24 && AES_BLOCK_SIZE != 32
#error an illegal block size has been specified
-#endif
+#endif
/**
- * Rotates bytes within words by n positions, moving bytes
+ * Rotates bytes within words by n positions, moving bytes
* to higher index positions with wrap around into low positions.
- */
+ */
#define upr(x,n) (((x) << 8 * (n)) | ((x) >> (32 - 8 * (n))))
/**
- * Moves bytes by n positions to higher index positions in
+ * Moves bytes by n positions to higher index positions in
* words but without wrap around.
- */
+ */
#define ups(x,n) ((x) << 8 * (n))
/**
@@ -154,7 +154,7 @@ struct private_aes_crypter_t {
/* little endian processor without data alignment restrictions: AES_LE_OK */
/* original code: i386 */
-#if defined(i386) || defined(_I386) || defined(__i386__) || defined(__i386)
+#if defined(i386) || defined(_I386) || defined(__i386__) || defined(__i386)
#define AES_LE_OK 1
/* added (tested): alpha --jjo */
#elif defined(__alpha__)|| defined (__alpha)
@@ -220,9 +220,9 @@ struct private_aes_crypter_t {
// give improved performance if a fast 32-bit multiply is not available. Note
// that a temporary variable u needs to be defined where FFmulX is used.
-// #define FFmulX(x) (u = (x) & m1, u |= (u >> 1), ((x) & m2) << 1) ^ ((u >> 3) | (u >> 6))
+// #define FFmulX(x) (u = (x) & m1, u |= (u >> 1), ((x) & m2) << 1) ^ ((u >> 3) | (u >> 6))
// #define m4 0x1b1b1b1b
-// #define FFmulX(x) (u = (x) & m1, ((x) & m2) << 1) ^ ((u - (u >> 7)) & m4)
+// #define FFmulX(x) (u = (x) & m1, ((x) & m2) << 1) ^ ((u - (u >> 7)) & m4)
// perform column mix operation on four bytes in parallel
@@ -343,7 +343,7 @@ static const u_int32_t rcon_tab[29] =
#define w2(p) 0x00##p##0000
#define w3(p) 0x##p##000000
-#if defined(FIXED_TABLES) && (defined(ONE_TABLE) || defined(FOUR_TABLES))
+#if defined(FIXED_TABLES) && (defined(ONE_TABLE) || defined(FOUR_TABLES))
// data for forward tables (other than last round)
@@ -526,7 +526,7 @@ static const u_int32_t it_tab[4][256] =
#endif
-#if defined(FIXED_TABLES) && (defined(ONE_LR_TABLE) || defined(FOUR_LR_TABLES))
+#if defined(FIXED_TABLES) && (defined(ONE_LR_TABLE) || defined(FOUR_LR_TABLES))
// data for inverse tables (last round)
@@ -608,7 +608,7 @@ static const u_int32_t il_tab[4][256] =
#endif
-#if defined(FIXED_TABLES) && (defined(ONE_IM_TABLE) || defined(FOUR_IM_TABLES))
+#if defined(FIXED_TABLES) && (defined(ONE_IM_TABLE) || defined(FOUR_IM_TABLES))
#define m_table \
r(00,00,00,00), r(0b,0d,09,0e), r(16,1a,12,1c), r(1d,17,1b,12),\
@@ -733,8 +733,8 @@ static u_int32_t im_tab[4][256];
#if !defined(FF_TABLES)
-// It will generally be sensible to use tables to compute finite
-// field multiplies and inverses but where memory is scarse this
+// It will generally be sensible to use tables to compute finite
+// field multiplies and inverses but where memory is scarse this
// code might sometimes be better.
// return 2 ^ (n - 1) where n is the bit number of the highest bit
@@ -743,7 +743,7 @@ static u_int32_t im_tab[4][256];
static unsigned char hibit(const u_int32_t x)
{ unsigned char r = (unsigned char)((x >> 1) | (x >> 2));
-
+
r |= (r >> 2);
r |= (r >> 4);
return (r + 1) >> 1;
@@ -761,14 +761,14 @@ static unsigned char FFinv(const unsigned char x)
if(!n1) return v1;
while(n2 >= n1)
- {
+ {
n2 /= n1; p2 ^= p1 * n2; v2 ^= v1 * n2; n2 = hibit(p2);
}
-
+
if(!n2) return v2;
while(n1 >= n2)
- {
+ {
n1 /= n2; p1 ^= p2 * n1; v1 ^= v2 * n1; n1 = hibit(p1);
}
}
@@ -815,9 +815,9 @@ static void gen_tabs(void)
// 0x011b as modular polynomial - the simplest primitive
// root is 0x03, used here to generate the tables
- i = 0; w = 1;
+ i = 0; w = 1;
do
- {
+ {
pow[i] = (unsigned char)w;
pow[i + 255] = (unsigned char)w;
log[w] = (unsigned char)i++;
@@ -987,8 +987,8 @@ switch(nc) \
// is being computed, return the input state variables which are
// needed for each row (r) of the state
-// For the fixed block size options, compilers reduce these two
-// expressions to fixed variable references. For variable block
+// For the fixed block size options, compilers reduce these two
+// expressions to fixed variable references. For variable block
// size code conditional clauses will sometimes be returned
#define unused 77 // Sunset Strip
@@ -1226,17 +1226,17 @@ static void encrypt_block(const private_aes_crypter_t *this, const unsigned char
switch(this->aes_Nrnd)
{
- case 14: round(fwd_rnd, b1, b0, kp );
+ case 14: round(fwd_rnd, b1, b0, kp );
round(fwd_rnd, b0, b1, kp + nc ); kp += 2 * nc;
- case 12: round(fwd_rnd, b1, b0, kp );
+ case 12: round(fwd_rnd, b1, b0, kp );
round(fwd_rnd, b0, b1, kp + nc ); kp += 2 * nc;
- case 10: round(fwd_rnd, b1, b0, kp );
+ case 10: round(fwd_rnd, b1, b0, kp );
round(fwd_rnd, b0, b1, kp + nc);
- round(fwd_rnd, b1, b0, kp + 2 * nc);
+ round(fwd_rnd, b1, b0, kp + 2 * nc);
round(fwd_rnd, b0, b1, kp + 3 * nc);
- round(fwd_rnd, b1, b0, kp + 4 * nc);
+ round(fwd_rnd, b1, b0, kp + 4 * nc);
round(fwd_rnd, b0, b1, kp + 5 * nc);
- round(fwd_rnd, b1, b0, kp + 6 * nc);
+ round(fwd_rnd, b1, b0, kp + 6 * nc);
round(fwd_rnd, b0, b1, kp + 7 * nc);
round(fwd_rnd, b1, b0, kp + 8 * nc);
round(fwd_lrnd, b0, b1, kp + 9 * nc);
@@ -1247,7 +1247,7 @@ static void encrypt_block(const private_aes_crypter_t *this, const unsigned char
for(rnd = 0; rnd < (this->aes_Nrnd >> 1) - 1; ++rnd)
{
- round(fwd_rnd, b1, b0, kp);
+ round(fwd_rnd, b1, b0, kp);
round(fwd_rnd, b0, b1, kp + nc); kp += 2 * nc;
}
@@ -1259,7 +1259,7 @@ static void encrypt_block(const private_aes_crypter_t *this, const unsigned char
for(rnd = 0; rnd < this->aes_Nrnd - 1; ++rnd)
{
- round(fwd_rnd, b1, b0, kp);
+ round(fwd_rnd, b1, b0, kp);
l_copy(b0, b1); kp += nc;
}
@@ -1278,7 +1278,7 @@ static void decrypt_block(const private_aes_crypter_t *this, const unsigned char
const u_int32_t *kp = this->aes_d_key;
#if !defined(ONE_TABLE) && !defined(FOUR_TABLES)
- u_int32_t f2, f4, f8, f9;
+ u_int32_t f2, f4, f8, f9;
#endif
state_in(b0, in_blk, kp); kp += nc;
@@ -1291,13 +1291,13 @@ static void decrypt_block(const private_aes_crypter_t *this, const unsigned char
round(inv_rnd, b0, b1, kp + nc ); kp += 2 * nc;
case 12: round(inv_rnd, b1, b0, kp );
round(inv_rnd, b0, b1, kp + nc ); kp += 2 * nc;
- case 10: round(inv_rnd, b1, b0, kp );
+ case 10: round(inv_rnd, b1, b0, kp );
round(inv_rnd, b0, b1, kp + nc);
- round(inv_rnd, b1, b0, kp + 2 * nc);
+ round(inv_rnd, b1, b0, kp + 2 * nc);
round(inv_rnd, b0, b1, kp + 3 * nc);
- round(inv_rnd, b1, b0, kp + 4 * nc);
+ round(inv_rnd, b1, b0, kp + 4 * nc);
round(inv_rnd, b0, b1, kp + 5 * nc);
- round(inv_rnd, b1, b0, kp + 6 * nc);
+ round(inv_rnd, b1, b0, kp + 6 * nc);
round(inv_rnd, b0, b1, kp + 7 * nc);
round(inv_rnd, b1, b0, kp + 8 * nc);
round(inv_lrnd, b0, b1, kp + 9 * nc);
@@ -1308,7 +1308,7 @@ static void decrypt_block(const private_aes_crypter_t *this, const unsigned char
for(rnd = 0; rnd < (this->aes_Nrnd >> 1) - 1; ++rnd)
{
- round(inv_rnd, b1, b0, kp);
+ round(inv_rnd, b1, b0, kp);
round(inv_rnd, b0, b1, kp + nc); kp += 2 * nc;
}
@@ -1320,7 +1320,7 @@ static void decrypt_block(const private_aes_crypter_t *this, const unsigned char
for(rnd = 0; rnd < this->aes_Nrnd - 1; ++rnd)
{
- round(inv_rnd, b1, b0, kp);
+ round(inv_rnd, b1, b0, kp);
l_copy(b0, b1); kp += nc;
}
@@ -1340,7 +1340,7 @@ static void decrypt(private_aes_crypter_t *this, chunk_t data, chunk_t iv,
int pos;
const u_int32_t *iv_i;
u_int8_t *in, *out;
-
+
if (decrypted)
{
*decrypted = chunk_alloc(data.len);
@@ -1351,7 +1351,7 @@ static void decrypt(private_aes_crypter_t *this, chunk_t data, chunk_t iv,
out = data.ptr;
}
in = data.ptr;
-
+
pos = data.len-16;
in += pos;
out += pos;
@@ -1386,7 +1386,7 @@ static void encrypt (private_aes_crypter_t *this, chunk_t data, chunk_t iv,
int pos;
const u_int32_t *iv_i;
u_int8_t *in, *out;
-
+
in = data.ptr;
out = data.ptr;
if (encrypted)
@@ -1394,7 +1394,7 @@ static void encrypt (private_aes_crypter_t *this, chunk_t data, chunk_t iv,
*encrypted = chunk_alloc(data.len);
out = encrypted->ptr;
}
-
+
pos=0;
while(pos<data.len)
{
@@ -1440,18 +1440,18 @@ static void set_key (private_aes_crypter_t *this, chunk_t key)
{
u_int32_t *kf, *kt, rci, f = 0;
u_int8_t *in_key = key.ptr;
-
- this->aes_Nrnd = (this->aes_Nkey > (nc) ? this->aes_Nkey : (nc)) + 6;
-
+
+ this->aes_Nrnd = (this->aes_Nkey > (nc) ? this->aes_Nkey : (nc)) + 6;
+
this->aes_e_key[0] = const_word_in(in_key );
this->aes_e_key[1] = const_word_in(in_key + 4);
this->aes_e_key[2] = const_word_in(in_key + 8);
this->aes_e_key[3] = const_word_in(in_key + 12);
-
- kf = this->aes_e_key;
- kt = kf + nc * (this->aes_Nrnd + 1) - this->aes_Nkey;
+
+ kf = this->aes_e_key;
+ kt = kf + nc * (this->aes_Nrnd + 1) - this->aes_Nkey;
rci = 0;
-
+
switch(this->aes_Nkey)
{
case 4: do
@@ -1463,7 +1463,7 @@ static void set_key (private_aes_crypter_t *this, chunk_t key)
}
while(kf < kt);
break;
-
+
case 6: this->aes_e_key[4] = const_word_in(in_key + 16);
this->aes_e_key[5] = const_word_in(in_key + 20);
do
@@ -1496,18 +1496,18 @@ static void set_key (private_aes_crypter_t *this, chunk_t key)
while (kf < kt);
break;
}
-
+
if(!f)
{
u_int32_t i;
kt = this->aes_d_key + nc * this->aes_Nrnd;
kf = this->aes_e_key;
-
+
cpy(kt, kf); kt -= 2 * nc;
-
+
for(i = 1; i < this->aes_Nrnd; ++i)
- {
+ {
#if defined(ONE_TABLE) || defined(FOUR_TABLES)
#if !defined(ONE_IM_TABLE) && !defined(FOUR_IM_TABLES)
u_int32_t f2, f4, f8, f9;
@@ -1536,18 +1536,18 @@ static void destroy (private_aes_crypter_t *this)
aes_crypter_t *aes_crypter_create(encryption_algorithm_t algo, size_t key_size)
{
private_aes_crypter_t *this;
-
+
if (algo != ENCR_AES_CBC)
{
return NULL;
}
-
+
this = malloc_thing(private_aes_crypter_t);
-
+
#if !defined(FIXED_TABLES)
if(!tab_gen) { gen_tabs(); tab_gen = 1; }
#endif
-
+
this->key_size = key_size;
switch(key_size)
{
@@ -1564,13 +1564,13 @@ aes_crypter_t *aes_crypter_create(encryption_algorithm_t algo, size_t key_size)
free(this);
return NULL;
}
-
+
this->public.crypter_interface.encrypt = (void (*) (crypter_t *, chunk_t,chunk_t, chunk_t *)) encrypt;
this->public.crypter_interface.decrypt = (void (*) (crypter_t *, chunk_t , chunk_t, chunk_t *)) decrypt;
this->public.crypter_interface.get_block_size = (size_t (*) (crypter_t *)) get_block_size;
this->public.crypter_interface.get_key_size = (size_t (*) (crypter_t *)) get_key_size;
this->public.crypter_interface.set_key = (void (*) (crypter_t *,chunk_t)) set_key;
this->public.crypter_interface.destroy = (void (*) (crypter_t *)) destroy;
-
+
return &(this->public);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 06:35:47 +0000