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Open Document Format: Added support for small documents with content length < 1024

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This commit is contained in:
jsteube 2023-04-09 16:15:12 +00:00
parent 7a3a6d5d06
commit 6862c1102e
3 changed files with 65 additions and 119 deletions
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129
OpenCL/m18600-pure.cl
View File

@ -33,6 +33,7 @@ typedef struct odf11
u32 iv[2];
u32 checksum[5];
u32 encrypted_data[256];
int encrypted_len;
} odf11_t;
@ -759,116 +760,48 @@ KERNEL_FQ void FIXED_THREAD_COUNT(FIXED_LOCAL_SIZE_COMP) m18600_comp (KERN_ATTR_
GLOBAL_AS const odf11_t *es = &esalt_bufs[DIGESTS_OFFSET_HOST];
u32 iv[2];
iv[0] = es->iv[0];
iv[1] = es->iv[1];
u32 pt[256];
for (int i = 0, j = 0; i < es->encrypted_len; i += 8, j += 2)
{
u32 ct[2];
u32 pt0[4];
u32 pt1[4];
u32 pt2[4];
u32 pt3[4];
ct[0] = es->encrypted_data[j + 0];
ct[1] = es->encrypted_data[j + 1];
u32 buf[2];
BF_ENCRYPT (iv[0], iv[1]);
buf[0] = es->iv[0];
buf[1] = es->iv[1];
pt[j + 0] = ct[0] ^ iv[0];
pt[j + 1] = ct[1] ^ iv[1];
iv[0] = ct[0];
iv[1] = ct[1];
}
const int full64 = es->encrypted_len / 64;
const int encrypted_len64 = full64 * 64;
sha1_ctx_t sha1_ctx;
sha1_init (&sha1_ctx);
// decrypt blowfish-cfb and calculate plaintext checksum at the same time
for (int i = 0; i < 16; i++)
sha1_update (&sha1_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];
truncate_block_16x4_be_S (pt_remaining + 0, pt_remaining + 4, pt_remaining + 8, pt_remaining + 12, remaining64);
BF_ENCRYPT (buf[0], buf[1]);
pt0[0] = ct[0] ^ buf[0];
pt0[1] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 2];
ct[1] = es->encrypted_data[i16 + 3];
BF_ENCRYPT (buf[0], buf[1]);
pt0[2] = ct[0] ^ buf[0];
pt0[3] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 4];
ct[1] = es->encrypted_data[i16 + 5];
BF_ENCRYPT (buf[0], buf[1]);
pt1[0] = ct[0] ^ buf[0];
pt1[1] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 6];
ct[1] = es->encrypted_data[i16 + 7];
BF_ENCRYPT (buf[0], buf[1]);
pt1[2] = ct[0] ^ buf[0];
pt1[3] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 8];
ct[1] = es->encrypted_data[i16 + 9];
BF_ENCRYPT (buf[0], buf[1]);
pt2[0] = ct[0] ^ buf[0];
pt2[1] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 10];
ct[1] = es->encrypted_data[i16 + 11];
BF_ENCRYPT (buf[0], buf[1]);
pt2[2] = ct[0] ^ buf[0];
pt2[3] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 12];
ct[1] = es->encrypted_data[i16 + 13];
BF_ENCRYPT (buf[0], buf[1]);
pt3[0] = ct[0] ^ buf[0];
pt3[1] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
ct[0] = es->encrypted_data[i16 + 14];
ct[1] = es->encrypted_data[i16 + 15];
BF_ENCRYPT (buf[0], buf[1]);
pt3[2] = ct[0] ^ buf[0];
pt3[3] = ct[1] ^ buf[1];
buf[0] = ct[0];
buf[1] = ct[1];
sha1_update_64 (&sha1_ctx, pt0, pt1, pt2, pt3, 64);
sha1_update (&sha1_ctx, pt_remaining, remaining64);
}
sha1_final (&sha1_ctx);

1
docs/changes.txt
View File

@ -56,6 +56,7 @@
- Backend Checks: Describe workaround in error message when detecting more than 64 backend devices
- Brain: Added sanity check and corresponding error message for invalid --brain-port values
- Modules: Added support for non-zero IVs for -m 6800 (Lastpass). Also added `tools/lastpass2hashcat.py`
- Open Document Format: Added support for small documents with content length < 1024
- Status Code: Add specific return code for self-test fail (-11)
- Scrypt: Increase buffer sizes in module for hash mode 8900 to allow longer scrypt digests
- Unicode: Update UTF-8 to UTF-16 conversion to match RFC 3629

46
src/modules/module_18600.c
View File

@ -60,6 +60,7 @@ typedef struct odf11
u32 iv[2];
u32 checksum[5];
u32 encrypted_data[256];
int encrypted_len;
} odf11_t;
@ -261,8 +262,10 @@ 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);
@ -272,7 +275,6 @@ 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);
@ -299,15 +301,19 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
odf11->checksum[3] = hex_to_u32 (&checksum[24]);
odf11->checksum[4] = hex_to_u32 (&checksum[32]);
// iv
odf11->iv[0] = byte_swap_32 (hex_to_u32 (&iv[0]));
odf11->iv[1] = byte_swap_32 (hex_to_u32 (&iv[8]));
for (int i = 0, j = 0; i < 256; i += 1, j += 8)
{
odf11->encrypted_data[i] = hex_to_u32 (&encrypted_data[j]);
// ct
odf11->encrypted_data[i] = byte_swap_32 (odf11->encrypted_data[i]);
}
const int ct_len = token.len[11];
const u8 *ct_pos = token.buf[11];
odf11->encrypted_len = hex_decode (ct_pos, ct_len, (u8 *) odf11->encrypted_data);
for (int i = 0, j = 0; i < odf11->encrypted_len; i += 4, j += 1) odf11->encrypted_data[j] = byte_swap_32 (odf11->encrypted_data[j]);
// salt
@ -342,7 +348,19 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
{
const odf11_t *odf11 = (const odf11_t *) esalt_buf;
int out_len = snprintf (line_buf, line_size, "%s*0*0*%u*16*%08x%08x%08x%08x%08x*8*%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 (odf11->encrypted_data[i]);
u8 ct_buf8[(256 * 4 * 2) + 1];
const int ct_len = hex_encode ((const u8 *) ct_buf, odf11->encrypted_len, ct_buf8);
ct_buf8[ct_len] = 0;
const int out_len = snprintf (line_buf, line_size, "%s*0*0*%u*16*%08x%08x%08x%08x%08x*8*%08x%08x*16*%08x%08x%08x%08x*0*%s",
SIGNATURE_ODF,
odf11->iterations,
byte_swap_32 (odf11->checksum[0]),
@ -355,14 +373,8 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
salt->salt_buf[0],
salt->salt_buf[1],
salt->salt_buf[2],
salt->salt_buf[3]);
u8 *out_buf = (u8 *) line_buf;
for (int i = 0; i < 256; i++)
{
u32_to_hex (byte_swap_32 (odf11->encrypted_data[i]), out_buf + out_len); out_len += 8;
}
salt->salt_buf[3],
(char *) ct_buf8);
return out_len;
}