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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,58 +1,58 @@ | ||
| #include <stdint.h> | ||
| #include <time.h> | ||
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| #include "obfsutil.h" | ||
| #include "encrypt.h" | ||
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| int get_head_size(char *plaindata, int size, int def_size) { | ||
| if (plaindata == NULL || size < 2) | ||
| return def_size; | ||
| int head_type = plaindata[0] & 0x7; | ||
| if (head_type == 1) | ||
| return 7; | ||
| if (head_type == 4) | ||
| return 19; | ||
| if (head_type == 3) | ||
| return 4 + plaindata[1]; | ||
| return def_size; | ||
| } | ||
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| static int shift128plus_init_flag = 0; | ||
| static uint64_t shift128plus_s[2] = {0x10000000, 0xFFFFFFFF}; | ||
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| void init_shift128plus(void) { | ||
| if (shift128plus_init_flag == 0) { | ||
| shift128plus_init_flag = 1; | ||
| uint32_t seed = (uint32_t)time(NULL); | ||
| shift128plus_s[0] = seed | 0x100000000L; | ||
| shift128plus_s[1] = ((uint64_t)seed << 32) | 0x1; | ||
| } | ||
| } | ||
|
|
||
| uint64_t xorshift128plus(void) { | ||
| uint64_t x = shift128plus_s[0]; | ||
| uint64_t const y = shift128plus_s[1]; | ||
| shift128plus_s[0] = y; | ||
| x ^= x << 23; // a | ||
| x ^= x >> 17; // b | ||
| x ^= y ^ (y >> 26); // c | ||
| shift128plus_s[1] = x; | ||
| return x + y; | ||
| } | ||
|
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||
| int ss_md5_hmac(char *auth, char *msg, int msg_len, uint8_t *iv, int enc_iv_len, uint8_t *enc_key, int enc_key_len) | ||
| { | ||
| uint8_t auth_key[MAX_IV_LENGTH + MAX_KEY_LENGTH]; | ||
| memcpy(auth_key, iv, enc_iv_len); | ||
| memcpy(auth_key + enc_iv_len, enc_key, enc_key_len); | ||
| return ss_md5_hmac_with_key(auth, msg, msg_len, auth_key, MAX_IV_LENGTH + MAX_KEY_LENGTH); | ||
| } | ||
|
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||
| int ss_sha1_hmac(char *auth, char *msg, int msg_len, uint8_t *iv, int enc_iv_len, uint8_t *enc_key, int enc_key_len) | ||
| { | ||
| uint8_t auth_key[MAX_IV_LENGTH + MAX_KEY_LENGTH]; | ||
| memcpy(auth_key, iv, enc_iv_len); | ||
| memcpy(auth_key + enc_iv_len, enc_key, enc_key_len); | ||
| return ss_sha1_hmac_with_key(auth, msg, msg_len, auth_key, MAX_IV_LENGTH + MAX_KEY_LENGTH); | ||
| } | ||
|
|
||
| #include <stdint.h> | ||
| #include <time.h> | ||
|
|
||
| #include "obfsutil.h" | ||
| #include "encrypt.h" | ||
|
|
||
| int get_head_size(char *plaindata, int size, int def_size) { | ||
| if (plaindata == NULL || size < 2) | ||
| return def_size; | ||
| int head_type = plaindata[0] & 0x7; | ||
| if (head_type == 1) | ||
| return 7; | ||
| if (head_type == 4) | ||
| return 19; | ||
| if (head_type == 3) | ||
| return 4 + plaindata[1]; | ||
| return def_size; | ||
| } | ||
|
|
||
| static int shift128plus_init_flag = 0; | ||
| static uint64_t shift128plus_s[2] = {0x10000000, 0xFFFFFFFF}; | ||
|
|
||
| void init_shift128plus(void) { | ||
| if (shift128plus_init_flag == 0) { | ||
| shift128plus_init_flag = 1; | ||
| uint32_t seed = (uint32_t)time(NULL); | ||
| shift128plus_s[0] = seed | 0x100000000L; | ||
| shift128plus_s[1] = ((uint64_t)seed << 32) | 0x1; | ||
| } | ||
| } | ||
|
|
||
| uint64_t xorshift128plus(void) { | ||
| uint64_t x = shift128plus_s[0]; | ||
| uint64_t const y = shift128plus_s[1]; | ||
| shift128plus_s[0] = y; | ||
| x ^= x << 23; // a | ||
| x ^= x >> 17; // b | ||
| x ^= y ^ (y >> 26); // c | ||
| shift128plus_s[1] = x; | ||
| return x + y; | ||
| } | ||
|
|
||
| int ss_md5_hmac(char *auth, char *msg, int msg_len, uint8_t *iv, int enc_iv_len, uint8_t *enc_key, int enc_key_len) | ||
| { | ||
| uint8_t auth_key[MAX_IV_LENGTH + MAX_KEY_LENGTH]; | ||
| memcpy(auth_key, iv, enc_iv_len); | ||
| memcpy(auth_key + enc_iv_len, enc_key, enc_key_len); | ||
| return ss_md5_hmac_with_key(auth, msg, msg_len, auth_key, enc_iv_len + enc_key_len); | ||
| } | ||
|
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||
| int ss_sha1_hmac(char *auth, char *msg, int msg_len, uint8_t *iv, int enc_iv_len, uint8_t *enc_key, int enc_key_len) | ||
| { | ||
| uint8_t auth_key[MAX_IV_LENGTH + MAX_KEY_LENGTH]; | ||
| memcpy(auth_key, iv, enc_iv_len); | ||
| memcpy(auth_key + enc_iv_len, enc_key, enc_key_len); | ||
| return ss_sha1_hmac_with_key(auth, msg, msg_len, auth_key, enc_iv_len + enc_key_len); | ||
| } | ||