MeshCollider
7 years ago
parent
98212745c8
commit
6951a1c675
@ -1,37 +0,0 @@
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Bag Attributes
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friendlyName: Developer ID Application: BITCOIN FOUNDATION, INC., THE
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localKeyID: 6B 9C 6C A8 A5 73 70 70 E2 57 A3 49 D8 62 FB 97 C7 A5 5D 5E
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subject=/UID=PBV4GLS9J4/CN=Developer ID Application: BITCOIN FOUNDATION, INC., THE/OU=PBV4GLS9J4/O=BITCOIN FOUNDATION, INC., THE/C=US
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issuer=/CN=Developer ID Certification Authority/OU=Apple Certification Authority/O=Apple Inc./C=US
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-----BEGIN CERTIFICATE-----
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MIIFhzCCBG+gAwIBAgIIJ0r1rumyfZAwDQYJKoZIhvcNAQELBQAweTEtMCsGA1UE
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AwwkRGV2ZWxvcGVyIElEIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MSYwJAYDVQQL
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YXRpb24gcHJhY3RpY2Ugc3RhdGVtZW50cy4wDgYDVR0PAQH/BAQDAgeAMBYGA1Ud
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JQEB/wQMMAoGCCsGAQUFBwMDMBMGCiqGSIb3Y2QGAQ0BAf8EAgUAMA0GCSqGSIb3
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DQEBCwUAA4IBAQAfJ0BjID/1dS2aEeVyhAzPzCBjG8vm0gDf+/qfwRn3+yWeL9vS
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nMdbilwM48IyQWTagjGGcojbsAd/vE4N7NhQyHInoCllNoeor1I5xx+blTaGRBK+
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dDhJbbdlGCjsLnH/BczGZi5fyEJds9lUIrp1hJidRcUKO76qb/9gc6qNZpl1vH5k
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lDUuJYt7YhAs+L6rTXDyqcK9maeQr0gaOPsRRAQLLwiQCorPeMTUNsbVMdMwZYJs
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R+PxiAnk+nyi7rfiFvPoASAYUuI6OzYL/Fa6QU4/gYyPgic944QYVkaQBnc0vEP1
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nXq6LGKwgVGcqJnkr/E2kui5gJoV5C3qll3e
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-----END CERTIFICATE-----
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@ -1,37 +0,0 @@
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Bag Attributes
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friendlyName: The Bitcoin Foundation, Inc.'s COMODO CA Limited ID
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localKeyID: 8C 94 64 E3 B5 B0 41 89 5B 89 B0 57 CC 74 B9 44 E5 B2 92 66
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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.
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issuer=/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO Code Signing CA 2
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-----BEGIN CERTIFICATE-----
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MIIFeDCCBGCgAwIBAgIRAJVYMd+waOER7lUqtiz3M2IwDQYJKoZIhvcNAQEFBQAw
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A1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxITAfBgNV
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b2luIEZvdW5kYXRpb24sIEluYy4xJTAjBgNVBAMMHFRoZSBCaXRjb2luIEZvdW5k
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qgr6PEp9tIYC+MbM
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-----END CERTIFICATE-----
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@ -1,46 +0,0 @@
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Code-signing private key notes
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==
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The private keys for these certificates were generated on Gavin's main work machine,
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following the certificate authority's recommendations for generating certificate
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signing requests.
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For OSX, the private key was generated by Keychain.app on Gavin's main work machine.
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The key and certificate is in a separate, passphrase-protected keychain file that is
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unlocked to sign the Bitcoin-Qt.app bundle.
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For Windows, the private key was generated by Firefox running on Gavin's main work machine.
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The key and certificate were exported into a separate, passphrase-protected PKCS#12 file, and
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then deleted from Firefox's keystore. The exported file is used to sign the Windows setup.exe.
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Threat analysis
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--
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Gavin is a single point of failure. He could be coerced to divulge the secret signing keys,
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allowing somebody to distribute a Bitcoin-Qt.app or bitcoin-qt-setup.exe with a valid
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signature but containing a malicious binary.
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Or the machine Gavin uses to sign the binaries could be compromised, either remotely or
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by breaking in to his office, allowing the attacker to get the private key files and then
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install a keylogger to get the passphrase that protects them.
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Threat Mitigation
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--
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"Air gapping" the machine used to do the signing will not work, because the signing
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process needs to access a timestamp server over the network. And it would not
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prevent the "rubber hose cryptography" threat (coercing Gavin to sign a bad binary
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or divulge the private keys).
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Windows binaries are reproducibly 'gitian-built', and the setup.exe file created
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by the NSIS installer system is a 7zip archive, so you could check to make sure
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that the bitcoin-qt.exe file inside the installer had not been tampered with.
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However, an attacker could modify the installer's code, so when the setup.exe
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was run it compromised users' systems. A volunteer to write an auditing tool
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that checks the setup.exe for tampering, and checks the files in it against
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the list of gitian signatures, is needed.
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The long-term solution is something like the 'gitian downloader' system, which
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uses signatures from multiple developers to determine whether or not a binary
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should be trusted. However, that just pushes the problem to "how will
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non-technical users securely get the gitian downloader code to start?"
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Reference in new issue