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@ -24,7 +24,6 @@ static const char *HASH_NAME = "terra";
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static const u64 KERN_TYPE = 29600;
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static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE;
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static const u64 OPTS_TYPE = OPTS_TYPE_STOCK_MODULE
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| OPTS_TYPE_HASH_COPY
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| OPTS_TYPE_PT_GENERATE_BE;
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static const u32 SALT_TYPE = SALT_TYPE_EMBEDDED;
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static const char *ST_PASS = "hashcathas";
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@ -60,7 +59,8 @@ typedef struct pbkdf_sha1_tmp
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typedef struct terra
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{
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u32 salt_buf[8];
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u32 ct_block_a[4];
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u32 ct[16]; // 16 * 4 = 64 bytes (we have extra 16 bytes in digest: 64 + 16 = 80)
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u32 iv[4];
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} terra_t;
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@ -122,7 +122,8 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
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const u8 *salt_pos = token.buf[0];
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const int salt_len = token.len[0];
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// iv unused
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const u8 *iv_pos = token.buf[1];
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const int iv_len = token.len[1];
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const u8 *hash_pos = token.buf[2];
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const int hash_len = token.len[2];
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@ -143,6 +144,13 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
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terra->salt_buf[2] = hex_to_u32 (salt_pos + 16);
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terra->salt_buf[3] = hex_to_u32 (salt_pos + 24);
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// store IV
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if (iv_len != 32) return (PARSER_SALT_LENGTH);
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terra->iv[0] = hex_to_u32 (iv_pos + 0);
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terra->iv[1] = hex_to_u32 (iv_pos + 8);
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terra->iv[2] = hex_to_u32 (iv_pos + 16);
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terra->iv[3] = hex_to_u32 (iv_pos + 24);
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// Base64 decode the ciphertext
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u8 tmp_buf[512];
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int tmp_len;
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@ -152,13 +160,18 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
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if (tmp_len != 0x50) return (PARSER_HASH_LENGTH);
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u32* whole_digest = (u32*)tmp_buf;
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u32* whole_digest = (u32*) tmp_buf;
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// Penultimate block, i.e. IV, xored with a whole padding block
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terra->ct_block_a[0] = byte_swap_32(whole_digest[0xc] ^ 0x10101010);
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terra->ct_block_a[1] = byte_swap_32(whole_digest[0xd] ^ 0x10101010);
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terra->ct_block_a[2] = byte_swap_32(whole_digest[0xe] ^ 0x10101010);
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terra->ct_block_a[3] = byte_swap_32(whole_digest[0xf] ^ 0x10101010);
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terra->ct[0] = byte_swap_32(whole_digest[0xc] ^ 0x10101010);
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terra->ct[1] = byte_swap_32(whole_digest[0xd] ^ 0x10101010);
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terra->ct[2] = byte_swap_32(whole_digest[0xe] ^ 0x10101010);
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terra->ct[3] = byte_swap_32(whole_digest[0xf] ^ 0x10101010);
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for (int i = 4; i < 16; i++)
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{
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terra->ct[i] = whole_digest[i - 4];
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}
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// Last block
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digest[0] = byte_swap_32 (whole_digest[0x10]);
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@ -171,7 +184,52 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
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int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const void *digest_buf, MAYBE_UNUSED const salt_t *salt, MAYBE_UNUSED const void *esalt_buf, MAYBE_UNUSED const void *hook_salt_buf, MAYBE_UNUSED const hashinfo_t *hash_info, char *line_buf, MAYBE_UNUSED const int line_size)
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{
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const int line_len = snprintf (line_buf, line_size, "%s", hash_info->orighash);
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terra_t *terra = (terra_t *) esalt_buf;
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u32 *digest = (u32 *) digest_buf;
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// salt:
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char salt_hex[32 + 1] = { 0 };
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hex_encode ((u8 *) terra->salt_buf, 16, (u8 *) salt_hex); // or use: generic_salt_encode ()
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salt_hex[32] = 0;
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// iv:
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char iv_hex[32 + 1] = { 0 };
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hex_encode ((u8 *) terra->iv, 16, (u8 *) iv_hex);
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iv_hex[32] = 0;
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// data:
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u32 data[16 + 4] = { 0 }; // total: 80 bytes
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for (int i = 4; i < 16; i++)
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{
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data[i - 4] = terra->ct[i];
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}
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data[0xc] = byte_swap_32 (terra->ct[0] ^ 0x10101010);
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data[0xd] = byte_swap_32 (terra->ct[1] ^ 0x10101010);
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data[0xe] = byte_swap_32 (terra->ct[2] ^ 0x10101010);
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data[0xf] = byte_swap_32 (terra->ct[3] ^ 0x10101010);
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data[ 16] = byte_swap_32 (digest[0]);
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data[ 17] = byte_swap_32 (digest[1]);
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data[ 18] = byte_swap_32 (digest[2]);
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data[ 19] = byte_swap_32 (digest[3]);
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char data_b64[108 + 1] = { 0 };
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base64_encode (int_to_base64, (u8 *) data, 80, (u8 *) data_b64);
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data_b64[108] = 0;
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const int line_len = snprintf (line_buf, line_size, "%s%s%s", salt_hex, iv_hex, data_b64);
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return line_len;
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}
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