diff options
Diffstat (limited to 'sql/item_strfunc.cc')
| -rw-r--r-- | sql/item_strfunc.cc | 106 |
1 files changed, 52 insertions, 54 deletions
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc index ac15ac93f7d..b4dd2905fa4 100644 --- a/sql/item_strfunc.cc +++ b/sql/item_strfunc.cc @@ -42,6 +42,20 @@ C_MODE_END String my_empty_string("",default_charset_info); +/* + Convert an array of bytes to a hexadecimal representation. + + Used to generate a hexadecimal representation of a message digest. +*/ +static void array_to_hex(char *to, const char *str, uint len) +{ + const char *str_end= str + len; + for (; str != str_end; ++str) + { + *to++= _dig_vec_lower[((uchar) *str) >> 4]; + *to++= _dig_vec_lower[((uchar) *str) & 0x0F]; + } +} bool Item_str_func::fix_fields(THD *thd, Item **ref) @@ -114,12 +128,7 @@ String *Item_func_md5::val_str(String *str) null_value=1; return 0; } - sprintf((char *) str->ptr(), - "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", - digest[0], digest[1], digest[2], digest[3], - digest[4], digest[5], digest[6], digest[7], - digest[8], digest[9], digest[10], digest[11], - digest[12], digest[13], digest[14], digest[15]); + array_to_hex((char *) str->ptr(), (const char*) digest, 16); str->length((uint) 32); return str; } @@ -160,15 +169,7 @@ String *Item_func_sha::val_str(String *str) if (!( str->alloc(SHA1_HASH_SIZE*2) || (mysql_sha1_result(&context,digest)))) { - sprintf((char *) str->ptr(), - "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\ -%02x%02x%02x%02x%02x%02x%02x%02x", - digest[0], digest[1], digest[2], digest[3], - digest[4], digest[5], digest[6], digest[7], - digest[8], digest[9], digest[10], digest[11], - digest[12], digest[13], digest[14], digest[15], - digest[16], digest[17], digest[18], digest[19]); - + array_to_hex((char *) str->ptr(), (const char*) digest, SHA1_HASH_SIZE); str->length((uint) SHA1_HASH_SIZE*2); null_value=0; return str; @@ -678,8 +679,8 @@ String *Item_func_concat_ws::val_str(String *str) res->length() + sep_str->length() + res2->length()) { /* We have room in str; We can't get any errors here */ - if (str == res2) - { // This is quote uncommon! + if (str->ptr() == res2->ptr()) + { // This is quite uncommon! str->replace(0,0,*sep_str); str->replace(0,0,*res); } @@ -1721,68 +1722,65 @@ String *Item_func_encrypt::val_str(String *str) #endif /* HAVE_CRYPT */ } +bool Item_func_encode::seed() +{ + char buf[80]; + ulong rand_nr[2]; + String *key, tmp(buf, sizeof(buf), system_charset_info); + + if (!(key= args[1]->val_str(&tmp))) + return TRUE; + + hash_password(rand_nr, key->ptr(), key->length()); + sql_crypt.init(rand_nr); + + return FALSE; +} + void Item_func_encode::fix_length_and_dec() { max_length=args[0]->max_length; maybe_null=args[0]->maybe_null || args[1]->maybe_null; collation.set(&my_charset_bin); + /* Precompute the seed state if the item is constant. */ + seeded= args[1]->const_item() && + (args[1]->result_type() == STRING_RESULT) && !seed(); } String *Item_func_encode::val_str(String *str) { String *res; - char pw_buff[80]; - String tmp_pw_value(pw_buff, sizeof(pw_buff), system_charset_info); - String *password; DBUG_ASSERT(fixed == 1); if (!(res=args[0]->val_str(str))) { - null_value=1; /* purecov: inspected */ - return 0; /* purecov: inspected */ + null_value= 1; + return NULL; } - if (!(password=args[1]->val_str(& tmp_pw_value))) + if (!seeded && seed()) { - null_value=1; - return 0; + null_value= 1; + return NULL; } - null_value=0; - res=copy_if_not_alloced(str,res,res->length()); - SQL_CRYPT sql_crypt(password->ptr(), password->length()); - sql_crypt.init(); - sql_crypt.encode((char*) res->ptr(),res->length()); - res->set_charset(&my_charset_bin); + null_value= 0; + res= copy_if_not_alloced(str, res, res->length()); + crypto_transform(res); + sql_crypt.reinit(); + return res; } -String *Item_func_decode::val_str(String *str) +void Item_func_encode::crypto_transform(String *res) { - String *res; - char pw_buff[80]; - String tmp_pw_value(pw_buff, sizeof(pw_buff), system_charset_info); - String *password; - DBUG_ASSERT(fixed == 1); - - if (!(res=args[0]->val_str(str))) - { - null_value=1; /* purecov: inspected */ - return 0; /* purecov: inspected */ - } - - if (!(password=args[1]->val_str(& tmp_pw_value))) - { - null_value=1; - return 0; - } + sql_crypt.encode((char*) res->ptr(),res->length()); + res->set_charset(&my_charset_bin); +} - null_value=0; - res=copy_if_not_alloced(str,res,res->length()); - SQL_CRYPT sql_crypt(password->ptr(), password->length()); - sql_crypt.init(); +void Item_func_decode::crypto_transform(String *res) +{ sql_crypt.decode((char*) res->ptr(),res->length()); - return res; } |