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Code Issues Releases Wiki Activity

The following parser functions have been rewritten to make use of input_tokenizer():

Browse Source 
sha1aix_parse_hash
agilekey_parse_hash
lastpass_parse_hash
fortigate_parse_hash
This commit is contained in:
jsteube 2018-07-06 13:48:39 +02:00
parent 3bf3ec5bbe
commit 0820fe4100
2 changed files with 125 additions and 105 deletions
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8
include/interface.h
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@ -1020,14 +1020,6 @@ typedef struct hccapx hccapx_t;
typedef enum display_len typedef enum display_len
{ {
DISPLAY_LEN_MIN_6600 = 1 + 1 + 16 + 1 + 2080,
DISPLAY_LEN_MAX_6600 = 6 + 1 + 16 + 1 + 2080,
DISPLAY_LEN_MIN_6700 = 7 + 2 + 1 + 16 + 1 + 27,
DISPLAY_LEN_MAX_6700 = 7 + 2 + 1 + 48 + 1 + 27,
DISPLAY_LEN_MIN_6800 = 32 + 1 + 1 + 1 + 0,
DISPLAY_LEN_MAX_6800 = 32 + 1 + 5 + 1 + 32,
DISPLAY_LEN_MIN_7000 = 3 + 44,
DISPLAY_LEN_MAX_7000 = 3 + 44,
DISPLAY_LEN_MIN_7100 = 4 + 2 + 1 + 64 + 1 + 128, DISPLAY_LEN_MIN_7100 = 4 + 2 + 1 + 64 + 1 + 128,
DISPLAY_LEN_MAX_7100 = 4 + 5 + 1 + 64 + 1 + 128, DISPLAY_LEN_MAX_7100 = 4 + 5 + 1 + 64 + 1 + 128,
DISPLAY_LEN_MIN_7200 = 19 + 1 + 1 + 1 + 128, DISPLAY_LEN_MIN_7200 = 19 + 1 + 1 + 1 + 128,

222
src/interface.c
View File

@ -2849,7 +2849,8 @@ int bcrypt_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNU
token.signatures_buf[3] = SIGNATURE_BCRYPT4; token.signatures_buf[3] = SIGNATURE_BCRYPT4;
token.len[0] = 4; token.len[0] = 4;
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH; token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_SIGNATURE;
token.len_min[1] = 2; token.len_min[1] = 2;
token.len_max[1] = 2; token.len_max[1] = 2;
@ -7083,41 +7084,55 @@ int md5aix_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNU
int sha1aix_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig) int sha1aix_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig)
{ {
if ((input_len < DISPLAY_LEN_MIN_6700) || (input_len > DISPLAY_LEN_MAX_6700)) return (PARSER_GLOBAL_LENGTH);
if (memcmp (SIGNATURE_SHA1AIX, input_buf, 7) != 0) return (PARSER_SIGNATURE_UNMATCHED);
u32 *digest = (u32 *) hash_buf->digest; u32 *digest = (u32 *) hash_buf->digest;
salt_t *salt = hash_buf->salt; salt_t *salt = hash_buf->salt;
u8 *iter_pos = input_buf + 7; token_t token;
u8 *salt_pos = (u8 *) strchr ((const char *) iter_pos, '$'); token.token_cnt = 4;
if (salt_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED); token.signatures_cnt = 1;
token.signatures_buf[0] = SIGNATURE_SHA1AIX;
salt_pos++; token.len[0] = 7;
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_SIGNATURE;
u8 *hash_pos = (u8 *) strchr ((const char *) salt_pos, '$'); token.len_min[1] = 2;
token.len_max[1] = 2;
token.sep[1] = '$';
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
if (hash_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED); token.len_min[2] = 16;
token.len_max[2] = 48;
token.sep[2] = '$';
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
u32 salt_len = hash_pos - salt_pos; token.len[3] = 43;
token.attr[3] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_BASE64B;
if (salt_len < 16) return (PARSER_SALT_LENGTH); const int rc_tokenizer = input_tokenizer (input_buf, input_len, &token);
memcpy ((u8 *) salt->salt_buf, salt_pos, salt_len); if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
salt->salt_len = salt_len; u8 *iter_pos = token.buf[1];
u8 salt_iter[3] = { iter_pos[0], iter_pos[1], 0 }; char salt_iter[3] = { iter_pos[0], iter_pos[1], 0 };
salt->salt_sign[0] = hc_strtoul ((const char *) salt_iter, NULL, 10); salt->salt_sign[0] = hc_strtoul ((const char *) salt_iter, NULL, 10);
salt->salt_iter = (1u << hc_strtoul ((const char *) salt_iter, NULL, 10)) - 1; salt->salt_iter = (1u << hc_strtoul ((const char *) salt_iter, NULL, 10)) - 1;
hash_pos++; u8 *salt_pos = token.buf[2];
int salt_len = token.len[2];
const bool parse_rc = parse_and_store_generic_salt ((u8 *) salt->salt_buf, (int *) &salt->salt_len, salt_pos, salt_len, hashconfig);
if (parse_rc == false) return (PARSER_SALT_LENGTH);
u8 *hash_pos = token.buf[3];
sha1aix_decode ((u8 *) digest, hash_pos); sha1aix_decode ((u8 *) digest, hash_pos);
@ -7264,79 +7279,80 @@ int sha512aix_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
int agilekey_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig) int agilekey_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig)
{ {
if ((input_len < DISPLAY_LEN_MIN_6600) || (input_len > DISPLAY_LEN_MAX_6600)) return (PARSER_GLOBAL_LENGTH);
u32 *digest = (u32 *) hash_buf->digest; u32 *digest = (u32 *) hash_buf->digest;
salt_t *salt = hash_buf->salt; salt_t *salt = hash_buf->salt;
agilekey_t *agilekey = (agilekey_t *) hash_buf->esalt; agilekey_t *agilekey = (agilekey_t *) hash_buf->esalt;
/** token_t token;
* parse line
*/
u8 *iterations_pos = input_buf; token.token_cnt = 3;
u8 *saltbuf_pos = (u8 *) strchr ((const char *) iterations_pos, ':'); token.len_min[0] = 1;
token.len_max[0] = 6;
token.sep[0] = hashconfig->separator;
token.attr[0] = TOKEN_ATTR_VERIFY_LENGTH;
if (saltbuf_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED); token.len_min[1] = 16;
token.len_max[1] = 16;
token.sep[1] = hashconfig->separator;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
u32 iterations_len = saltbuf_pos - iterations_pos; token.len_min[2] = 2080;
token.len_max[2] = 2080;
token.sep[2] = hashconfig->separator;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
if (iterations_len > 6) return (PARSER_SALT_LENGTH); const int rc_tokenizer = input_tokenizer (input_buf, input_len, &token);
saltbuf_pos++; if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
u8 *cipherbuf_pos = (u8 *) strchr ((const char *) saltbuf_pos, ':');
if (cipherbuf_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED);
u32 saltbuf_len = cipherbuf_pos - saltbuf_pos;
if (saltbuf_len != 16) return (PARSER_SALT_LENGTH);
u32 cipherbuf_len = input_len - iterations_len - 1 - saltbuf_len - 1;
if (cipherbuf_len != 2080) return (PARSER_HASH_LENGTH);
cipherbuf_pos++;
/** /**
* pbkdf2 iterations * pbkdf2 iterations
*/ */
salt->salt_iter = hc_strtoul ((const char *) iterations_pos, NULL, 10) - 1; u8 *iter_pos = token.buf[0];
salt->salt_iter = hc_strtoul ((const char *) iter_pos, NULL, 10) - 1;
/** /**
* handle salt encoding * handle salt encoding
*/ */
u8 *salt_pos = token.buf[1];
int salt_len = token.len[1];
u8 *saltbuf_ptr = (u8 *) salt->salt_buf; u8 *saltbuf_ptr = (u8 *) salt->salt_buf;
for (u32 i = 0; i < saltbuf_len; i += 2) for (int i = 0; i < salt_len; i += 2)
{ {
const u8 p0 = saltbuf_pos[i + 0]; const u8 p0 = salt_pos[i + 0];
const u8 p1 = saltbuf_pos[i + 1]; const u8 p1 = salt_pos[i + 1];
*saltbuf_ptr++ = hex_convert (p1) << 0 *saltbuf_ptr++ = hex_convert (p1) << 0
| hex_convert (p0) << 4; | hex_convert (p0) << 4;
} }
salt->salt_len = saltbuf_len / 2; salt->salt_len = salt_len / 2;
/** /**
* handle cipher encoding * handle cipher encoding
*/ */
u32 tmp[32]; u8 *cipher_pos = token.buf[2];
int cipher_len = token.len[2];
u32 tmp[32] = { 0 };
u8 *cipherbuf_ptr = (u8 *) tmp; u8 *cipherbuf_ptr = (u8 *) tmp;
for (u32 i = 2016; i < cipherbuf_len; i += 2) for (int i = 2016; i < cipher_len; i += 2)
{ {
const u8 p0 = cipherbuf_pos[i + 0]; const u8 p0 = cipher_pos[i + 0];
const u8 p1 = cipherbuf_pos[i + 1]; const u8 p1 = cipher_pos[i + 1];
*cipherbuf_ptr++ = hex_convert (p1) << 0 *cipherbuf_ptr++ = hex_convert (p1) << 0
| hex_convert (p0) << 4; | hex_convert (p0) << 4;
@ -7355,10 +7371,10 @@ int agilekey_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_U
salt->salt_buf[10] = byte_swap_32 (tmp[6]); salt->salt_buf[10] = byte_swap_32 (tmp[6]);
salt->salt_buf[11] = byte_swap_32 (tmp[7]); salt->salt_buf[11] = byte_swap_32 (tmp[7]);
for (u32 i = 0, j = 0; i < 1040; i += 1, j += 2) for (int i = 0, j = 0; i < 1040; i += 1, j += 2)
{ {
const u8 p0 = cipherbuf_pos[j + 0]; const u8 p0 = cipher_pos[j + 0];
const u8 p1 = cipherbuf_pos[j + 1]; const u8 p1 = cipher_pos[j + 1];
agilekey->cipher[i] = hex_convert (p1) << 0 agilekey->cipher[i] = hex_convert (p1) << 0
| hex_convert (p0) << 4; | hex_convert (p0) << 4;
@ -7378,58 +7394,57 @@ int agilekey_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_U
int lastpass_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig) int lastpass_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig)
{ {
if ((input_len < DISPLAY_LEN_MIN_6800) || (input_len > DISPLAY_LEN_MAX_6800)) return (PARSER_GLOBAL_LENGTH);
u32 *digest = (u32 *) hash_buf->digest; u32 *digest = (u32 *) hash_buf->digest;
salt_t *salt = hash_buf->salt; salt_t *salt = hash_buf->salt;
u8 *hashbuf_pos = input_buf; token_t token;
u8 *iterations_pos = (u8 *) strchr ((const char *) hashbuf_pos, ':'); token.token_cnt = 3;
if (iterations_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED); token.len_min[0] = 32;
token.len_max[0] = 64;
token.sep[0] = hashconfig->separator;
token.attr[0] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
u32 hash_len = iterations_pos - hashbuf_pos; token.len_min[1] = 1;
token.len_max[1] = 6;
token.sep[1] = hashconfig->separator;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
if ((hash_len != 32) && (hash_len != 64)) return (PARSER_HASH_LENGTH); token.len_min[2] = 0;
token.len_max[2] = 32;
token.sep[2] = hashconfig->separator;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
iterations_pos++; const int rc_tokenizer = input_tokenizer (input_buf, input_len, &token);
u8 *saltbuf_pos = (u8 *) strchr ((const char *) iterations_pos, ':'); if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
if (saltbuf_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED); u8 *hash_pos = token.buf[0];
u32 iterations_len = saltbuf_pos - iterations_pos; digest[0] = hex_to_u32 (hash_pos + 0);
digest[1] = hex_to_u32 (hash_pos + 8);
saltbuf_pos++; digest[2] = hex_to_u32 (hash_pos + 16);
digest[3] = hex_to_u32 (hash_pos + 24);
u32 salt_len = input_len - hash_len - 1 - iterations_len - 1;
if (salt_len > 32) return (PARSER_SALT_LENGTH);
u8 *salt_buf_ptr = (u8 *) salt->salt_buf;
salt_len = parse_and_store_salt_legacy (salt_buf_ptr, saltbuf_pos, salt_len, hashconfig);
if (salt_len == UINT_MAX) return (PARSER_SALT_LENGTH);
salt->salt_len = salt_len;
salt->salt_iter = hc_strtoul ((const char *) iterations_pos, NULL, 10) - 1;
if (is_valid_hex_string (hashbuf_pos, 32) == false) return (PARSER_HASH_ENCODING);
digest[0] = hex_to_u32 ((const u8 *) &hashbuf_pos[ 0]);
digest[1] = hex_to_u32 ((const u8 *) &hashbuf_pos[ 8]);
digest[2] = hex_to_u32 ((const u8 *) &hashbuf_pos[16]);
digest[3] = hex_to_u32 ((const u8 *) &hashbuf_pos[24]);
digest[0] = byte_swap_32 (digest[0]); digest[0] = byte_swap_32 (digest[0]);
digest[1] = byte_swap_32 (digest[1]); digest[1] = byte_swap_32 (digest[1]);
digest[2] = byte_swap_32 (digest[2]); digest[2] = byte_swap_32 (digest[2]);
digest[3] = byte_swap_32 (digest[3]); digest[3] = byte_swap_32 (digest[3]);
u8 *iter_pos = token.buf[1];
salt->salt_iter = hc_strtoul ((const char *) iter_pos, NULL, 10) - 1;
u8 *salt_pos = token.buf[2];
int salt_len = token.len[2];
const bool parse_rc = parse_and_store_generic_salt ((u8 *) salt->salt_buf, (int *) &salt->salt_len, salt_pos, salt_len, hashconfig);
if (parse_rc == false) return (PARSER_SALT_LENGTH);
return (PARSER_OK); return (PARSER_OK);
} }
@ -15789,28 +15804,41 @@ int skip32_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNU
int fortigate_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig) int fortigate_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig)
{ {
if (input_len != DISPLAY_LEN_MIN_7000) return (PARSER_GLOBAL_LENGTH); u32 *digest = (u32 *) hash_buf->digest;
if (memcmp (SIGNATURE_FORTIGATE, input_buf, 3) != 0) return (PARSER_SIGNATURE_UNMATCHED); salt_t *salt = hash_buf->salt;
u32 *digest = (u32 *) hash_buf->digest; token_t token;
salt_t *salt = hash_buf->salt;
/** token.token_cnt = 2;
* parse line
*/
u8 *hash_pos = input_buf + 3; token.signatures_cnt = 1;
token.signatures_buf[0] = SIGNATURE_FORTIGATE;
token.len[0] = 3;
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_SIGNATURE;
token.len[1] = 44;
token.attr[1] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_BASE64A;
const int rc_tokenizer = input_tokenizer (input_buf, input_len, &token);
if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
/** /**
* verify data * verify data
*/ */
u8 *hash_pos = token.buf[1];
int hash_len = token.len[1];
// decode salt + SHA1 hash (12 + 20 = 32) // decode salt + SHA1 hash (12 + 20 = 32)
u8 tmp_buf[100] = { 0 }; u8 tmp_buf[100] = { 0 };
int decoded_len = base64_decode (base64_to_int, (const u8 *) hash_pos, DISPLAY_LEN_MAX_7000 - 3, tmp_buf); const int decoded_len = base64_decode (base64_to_int, hash_pos, hash_len, tmp_buf);
if (decoded_len != 32) return (PARSER_HASH_LENGTH); if (decoded_len != 32) return (PARSER_HASH_LENGTH);