PHP哈希碰撞攻击

[php]代码库

ZEND_API int _zend_hash_init(HashTable *ht, uint nSize, hash_func_t pHashFunction, dtor_func_t pDestructor, zend_bool persistent ZEND_FILE_LINE_DC)
{
    uint i = 3;
    Bucket **tmp;
 
    SET_INCONSISTENT(HT_OK);
 
    //长度向2的整数次幂圆整
    if (nSize >= 0x80000000) {
        /* prevent overflow */
        ht->nTableSize = 0x80000000;
    } else {
        while ((1U << i) < nSize) {
            i++;
        }
        ht->nTableSize = 1 << i;
    }
 
    ht->nTableMask = ht->nTableSize - 1;
 
    /*此处省略若干代码…*/
 
    return SUCCESS;
}