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Added support for small documents with content length < 1024 in -m 18400

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This commit is contained in:
jsteube 2023-04-08 20:29:54 +00:00
parent 234e6cf49f
commit 7a3a6d5d06
2 changed files with 66 additions and 115 deletions
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129
OpenCL/m18400-pure.cl
View File

@ -35,6 +35,7 @@ typedef struct odf12
u32 iv[4];
u32 checksum[8];
u32 encrypted_data[256];
int encrypted_len;
} odf12_t;
@ -352,111 +353,49 @@ KERNEL_FQ void m18400_comp (KERN_ATTR_TMPS_ESALT (odf12_tmp_t, odf12_t))
iv[2] = es->iv[2];
iv[3] = es->iv[3];
u32 pt[256];
for (int i = 0, j = 0; i < es->encrypted_len; i += 16, j += 4)
{
u32 ct[4];
u32 pt1[4];
u32 pt2[4];
u32 pt3[4];
u32 pt4[4];
ct[0] = es->encrypted_data[j + 0];
ct[1] = es->encrypted_data[j + 1];
ct[2] = es->encrypted_data[j + 2];
ct[3] = es->encrypted_data[j + 3];
aes256_decrypt (ks, ct, pt + j, s_td0, s_td1, s_td2, s_td3, s_td4);
pt[j + 0] ^= iv[0];
pt[j + 1] ^= iv[1];
pt[j + 2] ^= iv[2];
pt[j + 3] ^= iv[3];
iv[0] = ct[0];
iv[1] = ct[1];
iv[2] = ct[2];
iv[3] = ct[3];
}
const int full64 = es->encrypted_len / 64;
const int encrypted_len64 = full64 * 64;
sha256_ctx_t sha256_ctx;
sha256_init (&sha256_ctx);
// decrypt aes-cbc and calculate plaintext checksum at the same time
for (int i = 0; i < 16; i++)
sha256_update_swap (&sha256_ctx, pt, encrypted_len64);
const int remaining64 = es->encrypted_len - encrypted_len64;
if (remaining64)
{
const int i16 = i * 16;
u32 *pt_remaining = pt + (encrypted_len64 / 4);
ct[0] = es->encrypted_data[i16 + 0];
ct[1] = es->encrypted_data[i16 + 1];
ct[2] = es->encrypted_data[i16 + 2];
ct[3] = es->encrypted_data[i16 + 3];
truncate_block_16x4_be_S (pt_remaining + 0, pt_remaining + 4, pt_remaining + 8, pt_remaining + 12, remaining64);
aes256_decrypt (ks, ct, pt1, s_td0, s_td1, s_td2, s_td3, s_td4);
pt1[0] ^= iv[0];
pt1[1] ^= iv[1];
pt1[2] ^= iv[2];
pt1[3] ^= iv[3];
iv[0] = ct[0];
iv[1] = ct[1];
iv[2] = ct[2];
iv[3] = ct[3];
ct[0] = es->encrypted_data[i16 + 4];
ct[1] = es->encrypted_data[i16 + 5];
ct[2] = es->encrypted_data[i16 + 6];
ct[3] = es->encrypted_data[i16 + 7];
aes256_decrypt (ks, ct, pt2, s_td0, s_td1, s_td2, s_td3, s_td4);
pt2[0] ^= iv[0];
pt2[1] ^= iv[1];
pt2[2] ^= iv[2];
pt2[3] ^= iv[3];
iv[0] = ct[0];
iv[1] = ct[1];
iv[2] = ct[2];
iv[3] = ct[3];
ct[0] = es->encrypted_data[i16 + 8];
ct[1] = es->encrypted_data[i16 + 9];
ct[2] = es->encrypted_data[i16 + 10];
ct[3] = es->encrypted_data[i16 + 11];
aes256_decrypt (ks, ct, pt3, s_td0, s_td1, s_td2, s_td3, s_td4);
pt3[0] ^= iv[0];
pt3[1] ^= iv[1];
pt3[2] ^= iv[2];
pt3[3] ^= iv[3];
iv[0] = ct[0];
iv[1] = ct[1];
iv[2] = ct[2];
iv[3] = ct[3];
ct[0] = es->encrypted_data[i16 + 12];
ct[1] = es->encrypted_data[i16 + 13];
ct[2] = es->encrypted_data[i16 + 14];
ct[3] = es->encrypted_data[i16 + 15];
aes256_decrypt (ks, ct, pt4, s_td0, s_td1, s_td2, s_td3, s_td4);
pt4[0] ^= iv[0];
pt4[1] ^= iv[1];
pt4[2] ^= iv[2];
pt4[3] ^= iv[3];
iv[0] = ct[0];
iv[1] = ct[1];
iv[2] = ct[2];
iv[3] = ct[3];
pt1[0] = hc_swap32_S (pt1[0]);
pt1[1] = hc_swap32_S (pt1[1]);
pt1[2] = hc_swap32_S (pt1[2]);
pt1[3] = hc_swap32_S (pt1[3]);
pt2[0] = hc_swap32_S (pt2[0]);
pt2[1] = hc_swap32_S (pt2[1]);
pt2[2] = hc_swap32_S (pt2[2]);
pt2[3] = hc_swap32_S (pt2[3]);
pt3[0] = hc_swap32_S (pt3[0]);
pt3[1] = hc_swap32_S (pt3[1]);
pt3[2] = hc_swap32_S (pt3[2]);
pt3[3] = hc_swap32_S (pt3[3]);
pt4[0] = hc_swap32_S (pt4[0]);
pt4[1] = hc_swap32_S (pt4[1]);
pt4[2] = hc_swap32_S (pt4[2]);
pt4[3] = hc_swap32_S (pt4[3]);
sha256_update_64 (&sha256_ctx, pt1, pt2, pt3, pt4, 64);
sha256_update_swap (&sha256_ctx, pt_remaining, remaining64);
}
sha256_final (&sha256_ctx);

44
src/modules/module_18400.c
View File

@ -58,6 +58,7 @@ typedef struct odf12
u32 iv[4];
u32 checksum[8];
u32 encrypted_data[256];
int encrypted_len;
} odf12_t;
@ -166,8 +167,10 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
token.attr[10] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_DIGIT;
token.len[11] = 2048;
token.attr[11] = TOKEN_ATTR_FIXED_LENGTH
token.len_min[11] = 16;
token.len_max[11] = 2048;
token.sep[11] = '*';
token.attr[11] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
@ -177,7 +180,6 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
const u8 *checksum = token.buf[5];
const u8 *iv = token.buf[7];
const u8 *salt_buf = token.buf[9];
const u8 *encrypted_data = token.buf[11];
const u32 cipher_type = strtol ((const char *) token.buf[1], NULL, 10);
const u32 checksum_type = strtol ((const char *) token.buf[2], NULL, 10);
@ -207,15 +209,19 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
odf12->checksum[6] = hex_to_u32 (&checksum[48]);
odf12->checksum[7] = hex_to_u32 (&checksum[56]);
// iv
odf12->iv[0] = hex_to_u32 (&iv[0]);
odf12->iv[1] = hex_to_u32 (&iv[8]);
odf12->iv[2] = hex_to_u32 (&iv[16]);
odf12->iv[3] = hex_to_u32 (&iv[24]);
for (int i = 0, j = 0; i < 256; i += 1, j += 8)
{
odf12->encrypted_data[i] = hex_to_u32 (&encrypted_data[j]);
}
// ct
const int ct_len = token.len[11];
const u8 *ct_pos = token.buf[11];
odf12->encrypted_len = hex_decode (ct_pos, ct_len, (u8 *) odf12->encrypted_data);
// salt
@ -248,7 +254,19 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
{
const odf12_t *odf12 = (const odf12_t *) esalt_buf;
int out_len = snprintf (line_buf, line_size, "%s*1*1*%u*32*%08x%08x%08x%08x%08x%08x%08x%08x*16*%08x%08x%08x%08x*16*%08x%08x%08x%08x*0*",
// ct
u32 ct_buf[256];
for (int i = 0; i < 256; i++) ct_buf[i] = byte_swap_32 (odf12->encrypted_data[i]);
u8 ct_buf8[(256 * 4 * 2) + 1];
const int ct_len = hex_encode ((const u8 *) ct_buf, odf12->encrypted_len, ct_buf8);
ct_buf8[ct_len] = 0;
const int out_len = snprintf (line_buf, line_size, "%s*1*1*%u*32*%08x%08x%08x%08x%08x%08x%08x%08x*16*%08x%08x%08x%08x*16*%08x%08x%08x%08x*0*%s",
SIGNATURE_ODF,
odf12->iterations,
byte_swap_32 (odf12->checksum[0]),
@ -266,14 +284,8 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
byte_swap_32 (salt->salt_buf[0]),
byte_swap_32 (salt->salt_buf[1]),
byte_swap_32 (salt->salt_buf[2]),
byte_swap_32 (salt->salt_buf[3]));
u8 *out_buf = (u8 *) line_buf;
for (int i = 0; i < 256; i++)
{
u32_to_hex (odf12->encrypted_data[i], out_buf + out_len); out_len += 8;
}
byte_swap_32 (salt->salt_buf[3]),
(char *) ct_buf8);
return out_len;
}