Code-signing certificates (no private keys) from Apple and Comodo

doc/release-process.txt

@@ -72,23 +72,20 @@
    rm -rf bitcoin-${VERSION}-win32
 
 * perform Mac build
-  See this blog post for how Gavin set up his build environment to build the OSX
+  OSX binaries are created by Gavin Andresen on a 32-bit, OSX 10.6 machine.
-  release; note that a patched version of macdeployqt is not needed anymore, as
-  the required functionality and fixes are implemented directly in macdeployqtplus:
-    http://gavintech.blogspot.com/2011/11/deploying-bitcoin-qt-on-osx.html
-  Gavin also had trouble with the macports py27-appscript package; he
-  ended up installing a version that worked with: /usr/bin/easy_install-2.7 appscript
 
   qmake RELEASE=1 USE_UPNP=1 USE_QRCODE=1 bitcoin-qt.pro
   make
   export QTDIR=/opt/local/share/qt4  # needed to find translations/qt_*.qm files
   T=$(contrib/qt_translations.py $QTDIR/translations src/qt/locale)
-  export CODESIGNARGS='--sign "Developer ID Application: BITCOIN FOUNDATION, INC., THE"'
+  python2.7 contrib/macdeploy/macdeployqtplus Bitcoin-Qt.app -add-qt-tr $T -dmg -fancy contrib/macdeploy/fancy.plist
-  python2.7 contrib/macdeploy/macdeployqtplus Bitcoin-Qt.app -sign -add-qt-tr $T -dmg -fancy contrib/macdeploy/fancy.plist
 
  Build output expected:
   Bitcoin-Qt.dmg
 
+* Code-sign Windows -setup.exe (in a Windows virtual machine) and
+  OSX Bitcoin-Qt.app (Note: only Gavin has the code-signing keys currently)
+
 * upload builds to SourceForge
 
 * create SHA256SUMS for builds, and PGP-sign it

share/certs/BitcoinFoundation_Apple_Cert.pem

@@ -0,0 +1,37 @@
+Bag Attributes
+    friendlyName: Developer ID Application: BITCOIN FOUNDATION, INC., THE
+    localKeyID: 6B 9C 6C A8 A5 73 70 70 E2 57 A3 49 D8 62 FB 97 C7 A5 5D 5E 
+subject=/UID=PBV4GLS9J4/CN=Developer ID Application: BITCOIN FOUNDATION, INC., THE/OU=PBV4GLS9J4/O=BITCOIN FOUNDATION, INC., THE/C=US
+issuer=/CN=Developer ID Certification Authority/OU=Apple Certification Authority/O=Apple Inc./C=US
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

share/certs/BitcoinFoundation_Comodo_Cert.pem

@@ -0,0 +1,37 @@
+Bag Attributes
+    friendlyName: The Bitcoin Foundation, Inc.'s COMODO CA Limited ID
+    localKeyID: 8C 94 64 E3 B5 B0 41 89 5B 89 B0 57 CC 74 B9 44 E5 B2 92 66 
+subject=/C=US/postalCode=98104-1444/ST=WA/L=Seattle/street=Suite 300/street=71 Columbia St/O=The Bitcoin Foundation, Inc./CN=The Bitcoin Foundation, Inc.
+issuer=/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO Code Signing CA 2
+-----BEGIN CERTIFICATE-----
+MIIFeDCCBGCgAwIBAgIRAJVYMd+waOER7lUqtiz3M2IwDQYJKoZIhvcNAQEFBQAw
+ezELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4G
+A1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxITAfBgNV
+BAMTGENPTU9ETyBDb2RlIFNpZ25pbmcgQ0EgMjAeFw0xMzAxMTYwMDAwMDBaFw0x
+NDAxMTYyMzU5NTlaMIG8MQswCQYDVQQGEwJVUzETMBEGA1UEEQwKOTgxMDQtMTQ0
+NDELMAkGA1UECAwCV0ExEDAOBgNVBAcMB1NlYXR0bGUxEjAQBgNVBAkMCVN1aXRl
+IDMwMDEXMBUGA1UECQwONzEgQ29sdW1iaWEgU3QxJTAjBgNVBAoMHFRoZSBCaXRj
+b2luIEZvdW5kYXRpb24sIEluYy4xJTAjBgNVBAMMHFRoZSBCaXRjb2luIEZvdW5k
+YXRpb24sIEluYy4wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQChUwLD
+u/hu5aFZ/n11B27awONaaDrmHm0pamiWHb01yL4JmTBtaLCrSftF8RhCscQ8jpI0
+UG1Cchmay0e3zH5o5XRs0H9C3x+SM5ozms0TWDmAYiB8aQEghsGovDk0D2nyTQeK
+Q0xqyCh0m8ZPOnMnYrakHEmF6WvhLdJvI6Od4KIwbKxgN17cPFIfLVsZ7GrzmmbU
+Gdi4wSQCHy5rxzvBxho8Qq/SfBl93uOMUrqOHjOUAPhNuTJG3t/MdhU8Zp24s29M
+abHtYkT9W86hMjIiI8RTAR+WHKVglx9SB0cjDabXN8SZ3gME0+H++LyzlySHT8sI
+ykepojZ7UBRgp9w3AgMBAAGjggGzMIIBrzAfBgNVHSMEGDAWgBQexbEsfYfaAmh8
+JbwMB4Q/ts/e8TAdBgNVHQ4EFgQUfPf+ZyDWl/4LH0Y5BuJTelkRd/EwDgYDVR0P
+AQH/BAQDAgeAMAwGA1UdEwEB/wQCMAAwEwYDVR0lBAwwCgYIKwYBBQUHAwMwEQYJ
+YIZIAYb4QgEBBAQDAgQQMEYGA1UdIAQ/MD0wOwYMKwYBBAGyMQECAQMCMCswKQYI
+KwYBBQUHAgEWHWh0dHBzOi8vc2VjdXJlLmNvbW9kby5uZXQvQ1BTMEEGA1UdHwQ6
+MDgwNqA0oDKGMGh0dHA6Ly9jcmwuY29tb2RvY2EuY29tL0NPTU9ET0NvZGVTaWdu
+aW5nQ0EyLmNybDByBggrBgEFBQcBAQRmMGQwPAYIKwYBBQUHMAKGMGh0dHA6Ly9j
+cnQuY29tb2RvY2EuY29tL0NPTU9ET0NvZGVTaWduaW5nQ0EyLmNydDAkBggrBgEF
+BQcwAYYYaHR0cDovL29jc3AuY29tb2RvY2EuY29tMCgGA1UdEQQhMB+BHWxpbmRz
+YXlAYml0Y29pbmZvdW5kYXRpb24ub3JnMA0GCSqGSIb3DQEBBQUAA4IBAQAqibjo
+D4HG5XSIIMCmYE5RgQBSEAJfI+EZERk1G9F83ZUWr0yNRZCw4O+RaM7xQhvJhEoD
+G2kpk/q2bNOc71/VyZ6SrE1JRVUON41/Flhz4M6cP0BclTicXvh+efVwqZhIz+ws
+UxF2hvC/1Xx6rqI7NYAlOYXk2MSUq3HREo+gWUPKM8em4MZZV/7XCH4QbsfxOl1J
+xS6EOQmV8hfUN4KRXI5WfGUmedBxq7dM0RSJOSQl8fq2f+JjRLfjQwQucy7LDY+y
+pRTsL2TdQV/DuDuI3s0NHRGznQNddoX5jqpXhSQFAAdgrhN1gGkWaaTPzr9IF2TG
+qgr6PEp9tIYC+MbM
+-----END CERTIFICATE-----

share/certs/PrivateKeyNotes.md

@@ -0,0 +1,46 @@
+Code-signing private key notes
+==
+
+The private keys for these certificates were generated on Gavin's main work machine,
+following the certificate authoritys' recommendations for generating certificate
+signing requests.
+
+For OSX, the private key was generated by Keychain.app on Gavin's main work machine.
+The key and certificate is in a separate, passphrase-protected keychain file that is
+unlocked to sign the Bitcoin-Qt.app bundle.
+
+For Windows, the private key was generated by Firefox running on Gavin's main work machine.
+The key and certificate were exported into a separate, passphrase-protected PKCS#12 file, and
+then deleted from Firefox's keystore. The exported file is used to sign the Windows setup.exe.
+
+Threat analysis
+--
+
+Gavin is a single point of failure. He could be coerced to divulge the secret signing keys,
+allowing somebody to distribute a Bitcoin-Qt.app or bitcoin-qt-setup.exe with a valid
+signature but containing a malicious binary.
+
+Or the machine Gavin uses to sign the binaries could be compromised, either remotely or
+by breaking in to his office, allowing the attacker to get the private key files and then
+install a keylogger to get the passphrase that protects them.
+
+Threat Mitigation
+--
+
+"Air gapping" the machine used to do the signing will not work, because the signing
+process needs to access a timestamp server over the network. And it would not
+prevent the "rubber hose cryptography" threat (coercing Gavin to sign a bad binary
+or divulge the private keys).
+
+Windows binaries are reproducibly 'gitian-built', and the setup.exe file created
+by the NSIS installer system is a 7zip archive, so you could check to make sure
+that the bitcoin-qt.exe file inside the installer had not been tampered with.
+However, an attacker could modify the installer's code, so when the setup.exe
+was run it compromised users' systems. A volunteer to write an auditing tool
+that checks the setup.exe for tampering, and checks the files in it against
+the list of gitian signatures, is needed.
+
+The long-term solution is something like the 'gitian downloader' system, which
+uses signatures from multiple developers to determine whether or not a binary
+should be trusted. However, that just pushes the problem to "how will
+non-technical users securely get the gitian downloader code to start?"