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148 lines
4.7 KiB
148 lines
4.7 KiB
Copyright (c) 2009-2010 Satoshi Nakamoto |
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Copyright (c) 2011 Bitcoin Developers |
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Distributed under the MIT/X11 software license, see the accompanying |
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file license.txt or http://www.opensource.org/licenses/mit-license.php. |
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This product includes software developed by the OpenSSL Project for use in |
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the OpenSSL Toolkit (http://www.openssl.org/). This product includes |
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cryptographic software written by Eric Young (eay@cryptsoft.com) and UPnP |
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software written by Thomas Bernard. |
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UNIX BUILD NOTES |
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================ |
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To Build |
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-------- |
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cd src/ |
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make -f makefile.unix # Headless bitcoin |
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See readme-qt.rst for instructions on building Bitcoin QT, |
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the graphical bitcoin. |
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Dependencies |
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------------ |
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Library Purpose Description |
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------- ------- ----------- |
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libssl SSL Support Secure communications |
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libdb4.8 Berkeley DB Blockchain & wallet storage |
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libboost Boost C++ Library |
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miinupnpc UPnP Support Optional firewall-jumping support |
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miniupnpc may be used for UPnP port mapping. It can be downloaded from |
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http://miniupnp.tuxfamily.org/files/. UPnP support is compiled in and |
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turned off by default. Set USE_UPNP to a different value to control this: |
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USE_UPNP= No UPnP support - miniupnp not required |
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USE_UPNP=0 (the default) UPnP support turned off by default at runtime |
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USE_UPNP=1 UPnP support turned on by default at runtime |
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Licenses of statically linked libraries: |
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Berkeley DB New BSD license with additional requirement that linked |
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software must be free open source |
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Boost MIT-like license |
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miniupnpc New (3-clause) BSD license |
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Versions used in this release: |
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GCC 4.3.3 |
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OpenSSL 0.9.8g |
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Berkeley DB 4.8.30.NC |
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Boost 1.37 |
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miniupnpc 1.6 |
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Dependency Build Instructions: Ubuntu & Debian |
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---------------------------------------------- |
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sudo apt-get install build-essential |
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sudo apt-get install libssl-dev |
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sudo apt-get install libdb4.8-dev |
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sudo apt-get install libdb4.8++-dev |
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Boost 1.40+: sudo apt-get install libboost-all-dev |
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or Boost 1.37: sudo apt-get install libboost1.37-dev |
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If using Boost 1.37, append -mt to the boost libraries in the makefile. |
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Dependency Build Instructions: Gentoo |
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------------------------------------- |
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emerge -av net-libs/miniupnpc boost openssl sys-libs/db |
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Then take the following steps to build: |
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cd ${BITCOIN_DIR}/src |
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sed -i 's/<db_cxx.h>/<db4.8\/db_cxx.h>/' *.h # path fix |
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sed -i 's/-Bstatic/-Bdynamic/' makefile.unix # dynamic linking |
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sed -i 's/^USE_UPNP:=0$/USE_UPNP:=/' makefile.unix # disable UPnP |
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make -f makefile.unix |
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strip bitcoind |
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Notes |
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----- |
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The release is built with GCC and then "strip bitcoind" to strip the debug |
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symbols, which reduces the executable size by about 90%. |
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miniupnpc |
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--------- |
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tar -xzvf miniupnpc-1.6.tar.gz |
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cd miniupnpc-1.6 |
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make |
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sudo su |
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make install |
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Berkeley DB |
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----------- |
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You need Berkeley DB 4.8. If you have to build Berkeley DB yourself: |
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../dist/configure --enable-cxx |
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make |
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Boost |
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----- |
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If you need to build Boost yourself: |
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sudo su |
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./bootstrap.sh |
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./bjam install |
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Security |
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-------- |
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To help make your bitcoin installation more secure by making certain attacks impossible to |
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exploit even if a vulnerability is found, you can take the following measures: |
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* Position Independent Executable |
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Build position independent code to take advantage of Address Space Layout Randomization |
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offered by some kernels. An attacker who is able to cause execution of code at an arbitrary |
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memory location is thwarted if he doesn't know where anything useful is located. |
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The stack and heap are randomly located by default but this allows the code section to be |
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randomly located as well. |
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On an Amd64 processor where a library was not compiled with -fPIC, this will cause an error |
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such as: "relocation R_X86_64_32 against `......' can not be used when making a shared object;" |
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To build with PIE, use: |
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make -f makefile.unix ... -e PIE=1 |
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To test that you have built PIE executable, install scanelf, part of paxutils, and use: |
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scanelf -e ./bitcoin |
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The output should contain: |
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TYPE |
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ET_DYN |
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* Non-executable Stack |
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If the stack is executable then trivial stack based buffer overflow exploits are possible if |
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vulnerable buffers are found. By default, bitcoin should be built with a non-executable stack |
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but if one of the libraries it uses asks for an executable stack or someone makes a mistake |
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and uses a compiler extension which requires an executable stack, it will silently build an |
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executable without the non-executable stack protection. |
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To verify that the stack is non-executable after compiling use: |
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scanelf -e ./bitcoin |
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the output should contain: |
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STK/REL/PTL |
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RW- R-- RW- |
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The STK RW- means that the stack is readable and writeable but not executable.
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