diff options
Diffstat (limited to 'src/dvault.c')
| -rw-r--r-- | src/dvault.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/dvault.c b/src/dvault.c new file mode 100644 index 0000000..df2f0d6 --- /dev/null +++ b/src/dvault.c @@ -0,0 +1,187 @@ +#include "dvault.h" + +#include <stdint.h> +#include <stdbool.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + + +const uint8_t PRNE_DVAULT_MASK[] = { + 0xA2, 0x7A, 0x61, 0x65, 0x78, 0xBE, 0x95, 0x8A, 0xBF, 0x07, + 0x52, 0x8F, 0x0E, 0x6F, 0x0B, 0xD8, 0x5B, 0xD4, 0x77, 0x9D, + 0x39, 0x28, 0x72, 0xE2, 0x42, 0x5D, 0xE7, 0x92, 0xDD, 0xAF, + 0xF7, 0x90, 0x8B, 0x2D, 0x1F, 0xB1, 0x18, 0x4B, 0x3C, 0x32, + 0x58, 0xFC, 0x34, 0x94, 0xCA, 0x31, 0x43, 0xDB, 0x93, 0x55, + 0xB5, 0xEF, 0x02, 0x8E, 0x84, 0x22, 0x88, 0x86, 0xEE, 0xC6, + 0x44, 0xCB, 0xA3, 0xEC, 0x59, 0x8C, 0x8D, 0x7F, 0x6B, 0x0A, + 0x3D, 0xA7, 0x6E, 0x9F, 0x2A, 0x7B, 0x12, 0x7D, 0xBD, 0xF8, + 0x15, 0xAC, 0xF9, 0xD9, 0x3E, 0xF5, 0x38, 0xF4, 0x6D, 0xAB, + 0xE9, 0x4C, 0x0D, 0x3F, 0x71, 0xDF, 0xC0, 0xB9, 0xD5, 0xA6, + 0x53, 0xED, 0xE6, 0x82, 0x73, 0xC8, 0xA5, 0x08, 0x48, 0x1A, + 0x79, 0x05, 0x10, 0x75, 0xF3, 0xE4, 0x85, 0xEB, 0xDC, 0x2C, + 0x23, 0xCD, 0xBC, 0x1C, 0x45, 0x24, 0x5C, 0x26, 0x17, 0xB3, + 0xA0, 0xBB, 0x03, 0xC9, 0xA1, 0x56, 0x2F, 0x91, 0xCF, 0xFE, + 0xC2, 0xAE, 0x54, 0xE1, 0x00, 0x13, 0x9C, 0x5E, 0xAD, 0xB8, + 0xB6, 0x63, 0x9E, 0x7C, 0x87, 0x60, 0x51, 0xFD, 0xF0, 0x76, + 0x4E, 0x4A, 0x9B, 0x1D, 0xF1, 0x0F, 0x06, 0xD1, 0x68, 0x99, + 0x20, 0x81, 0x3A, 0xE3, 0x25, 0xAA, 0x36, 0x98, 0x62, 0x96, + 0xC4, 0x30, 0x37, 0x47, 0x2B, 0x3B, 0x80, 0x64, 0x21, 0x67, + 0xB0, 0xB4, 0x01, 0x89, 0xC1, 0x0C, 0x41, 0xC3, 0x57, 0xB2, + 0x9A, 0x35, 0xBA, 0xD7, 0x66, 0xE0, 0x19, 0xF2, 0x04, 0xFB, + 0x70, 0xD6, 0xFF, 0x40, 0x83, 0xDE, 0xD0, 0xB7, 0xA8, 0xEA, + 0x16, 0x49, 0xFA, 0xCC, 0x11, 0x46, 0xCE, 0xE8, 0x4F, 0xD2, + 0x4D, 0xE5, 0x27, 0x50, 0x6A, 0x74, 0xDA, 0xC7, 0xA4, 0xA9, + 0x5F, 0x97, 0x29, 0x14, 0x6C, 0x7E, 0x1E, 0xC5, 0x5A, 0x1B, + 0x33, 0x69, 0x09, 0x2E, 0xD3, 0xF6 +}; + +static uint8_t *unmasked_buf = NULL; +static size_t unmasked_buf_size = 0; + + +static void invert_entry (const prne_data_key_t key, size_t *len) { + const size_t entry_size = prne_dvault_get_entry_size(key); + + if (len != NULL) { + *len = entry_size; + } + memcpy(unmasked_buf, PRNE_DATA_DICT[key] + 4, entry_size); + prne_dvault_invert_mem(entry_size, unmasked_buf, prne_dvault_get_entry_salt(key)); +} + +static void entry_check (const prne_data_key_t key, const prne_data_type_t type) { + if (!(PRNE_DATA_KEY_NONE < key && key < NB_PRNE_DATA_KEY) || + !(PRNE_DATA_TYPE_NONE < type && type < NB_PRNE_DATA_TYPE) || + type != prne_dvault_get_entry_data_type(key)) { + abort(); + } +} + + +const char *prne_data_type2str (const prne_data_type_t t) { + switch (t) { + case PRNE_DATA_TYPE_CSTR: return "cstr"; + } + return NULL; +} + +prne_data_type_t prne_str2data_type (const char *str) { + if (strcmp(str, prne_data_type2str(PRNE_DATA_TYPE_CSTR)) == 0) { + return PRNE_DATA_TYPE_CSTR; + } + return PRNE_DATA_TYPE_NONE; +} + +void prne_dvault_invert_mem (const size_t size, uint8_t *m, const uint8_t salt) { + size_t i; + + for (i = 0; i < size; i += 1) { + m[i] ^= PRNE_DVAULT_MASK[(i + (size_t)salt) % 256]; + } +} + +void prne_init_dvault_mask_result (prne_dvault_mask_result_t *r) { + r->result = PRNE_DVAULT_MASK_OK; + r->str = NULL; + r->str_len = 0; +} + +void prne_free_dvault_mask_result (prne_dvault_mask_result_t *r) { + free(r->str); + r->str_len = 0; + r->str = NULL; + r->result = PRNE_DVAULT_MASK_OK; +} + +prne_dvault_mask_result_t prne_dvault_mask (const prne_data_type_t type, const uint8_t salt, const size_t data_size, const uint8_t *data) { + size_t i; + prne_dvault_mask_result_t ret; + + prne_init_dvault_mask_result(&ret); + + if (data_size > 0x0000FFFF) { + ret.result = PRNE_DVAULT_MASK_TOO_LARGE; + return ret; + } + if (!(PRNE_DATA_TYPE_NONE < type && type < NB_PRNE_DATA_TYPE)) { + ret.result = PRNE_DVAULT_MASK_INVALID_TYPE; + return ret; + } + + ret.str_len = 4 * 4 + 4 * data_size + 1; + ret.str = malloc(ret.str_len); + if (ret.str == NULL) { + ret.result = PRNE_DVAULT_MASK_MEM_ERR; + ret.str_len = 0; + return ret; + } + + sprintf(ret.str, "\\x%02X\\x%02X\\x%02X\\x%02X", + (uint8_t)type, + salt, + (uint8_t)((0x0000FF00 & (uint32_t)data_size) >> 8), + (uint8_t)((0x000000FF & (uint32_t)data_size) >> 0)); + + for (i = 0; i < data_size; i += 1) { + sprintf(ret.str + 4 * 4 + 4 * i, "\\x%02X", data[i] ^ PRNE_DVAULT_MASK[(i + (size_t)salt) % 256]); + } + + return ret; +} + +void prne_init_dvault (void) { + size_t max_size = 0; + size_t entry_size; + prne_data_key_t i; + + for (i = PRNE_DATA_KEY_NONE + 1; i < NB_PRNE_DATA_KEY; i += 1) { + entry_size = prne_dvault_get_entry_size(i); + switch (prne_dvault_get_entry_data_type(i)) { + case PRNE_DATA_TYPE_CSTR: + entry_size += 1; + break; + } + + if (entry_size > max_size) { + max_size = entry_size; + } + } + + if (max_size == 0) { + abort(); + } + unmasked_buf = calloc(max_size, 1); + unmasked_buf_size = max_size; + if (unmasked_buf == NULL) { + abort(); + } +} + +void prne_deinit_dvault (void) { + free(unmasked_buf); + unmasked_buf = NULL; +} + +prne_data_type_t prne_dvault_get_entry_data_type (const prne_data_key_t key) { + return (prne_data_type_t)PRNE_DATA_DICT[key][0]; +} + +size_t prne_dvault_get_entry_size (const prne_data_key_t key) { + return (size_t)PRNE_DATA_DICT[key][2] << 8 | (size_t)PRNE_DATA_DICT[key][3]; +} + +uint8_t prne_dvault_get_entry_salt (const prne_data_key_t key) { + return PRNE_DATA_DICT[key][1]; +} + +char *prne_dvault_unmask_entry_cstr (const prne_data_key_t key, size_t *len) { + prne_dvault_reset_dict(); + entry_check(key, PRNE_DATA_TYPE_CSTR); + invert_entry(key, len); + return (char*)unmasked_buf; +} + +void prne_dvault_reset_dict (void) { + memset(unmasked_buf, 0, unmasked_buf_size); +} |