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- #------------------------------------------------------------------------------
- # $File: pgp,v 1.25 2021/04/26 15:56:00 christos Exp $
- # pgp: file(1) magic for Pretty Good Privacy
- # Handling of binary PGP keys is in pgp-binary-keys.
- # see https://lists.gnupg.org/pipermail/gnupg-devel/1999-September/016052.html
- #
- 0 beshort 0xa600 PGP encrypted data
- #!:mime application/pgp-encrypted
- #0 string -----BEGIN\040PGP text/PGP armored data
- !:mime text/PGP # encoding: armored data
- #>15 string PUBLIC\040KEY\040BLOCK- public key block
- #>15 string MESSAGE- message
- #>15 string SIGNED\040MESSAGE- signed message
- #>15 string PGP\040SIGNATURE- signature
- # Update: Joerg Jenderek
- # URL: http://en.wikipedia.org/wiki/Pretty_Good_Privacy
- # Reference: https://reposcope.com/mimetype/application/pgp-keys
- 2 string ---BEGIN\040PGP\040PRIVATE\040KEY\040BLOCK- PGP private key block
- #!:mime text/PGP
- !:mime application/pgp-keys
- !:ext asc
- 2 string ---BEGIN\040PGP\040PUBLIC\040KEY\040BLOCK- PGP public key block
- !:mime application/pgp-keys
- !:ext asc
- >10 search/100 \n\n
- >>&0 use pgp
- 0 string -----BEGIN\040PGP\040MESSAGE- PGP message
- # https://reposcope.com/mimetype/application/pgp-encrypted
- #!:mime application/pgp
- !:mime application/pgp-encrypted
- !:ext asc
- #!:ext asc/pgp/gpg
- >10 search/100 \n\n
- >>&0 use pgp
- # Reference: https://www.gnupg.org/gph/en/manual/x135.html
- 0 string -----BEGIN\040PGP\040SIGNED\040MESSAGE- PGP signed message
- #!:mime text/plain
- !:mime text/PGP
- #!:mime application/pgp
- !:ext asc
- 0 string -----BEGIN\040PGP\040SIGNATURE- PGP signature
- # https://reposcope.com/mimetype/application/pgp-signature
- !:mime application/pgp-signature
- !:ext asc
- >10 search/100 \n\n
- >>&0 use pgp
- # Decode the type of the packet based on it's base64 encoding.
- # Idea from Mark Martinec
- # The specification is in RFC 4880, section 4.2 and 4.3:
- # https://tools.ietf.org/html/rfc4880#section-4.2
- 0 name pgp
- >0 byte 0x67 Reserved (old)
- >0 byte 0x68 Public-Key Encrypted Session Key (old)
- >0 byte 0x69 Signature (old)
- >0 byte 0x6a Symmetric-Key Encrypted Session Key (old)
- >0 byte 0x6b One-Pass Signature (old)
- >0 byte 0x6c Secret-Key (old)
- >0 byte 0x6d Public-Key (old)
- >0 byte 0x6e Secret-Subkey (old)
- >0 byte 0x6f Compressed Data (old)
- >0 byte 0x70 Symmetrically Encrypted Data (old)
- >0 byte 0x71 Marker (old)
- >0 byte 0x72 Literal Data (old)
- >0 byte 0x73 Trust (old)
- >0 byte 0x74 User ID (old)
- >0 byte 0x75 Public-Subkey (old)
- >0 byte 0x76 Unused (old)
- >0 byte 0x77
- >>1 byte&0xc0 0x00 Reserved
- >>1 byte&0xc0 0x40 Public-Key Encrypted Session Key
- >>1 byte&0xc0 0x80 Signature
- >>1 byte&0xc0 0xc0 Symmetric-Key Encrypted Session Key
- >0 byte 0x78
- >>1 byte&0xc0 0x00 One-Pass Signature
- >>1 byte&0xc0 0x40 Secret-Key
- >>1 byte&0xc0 0x80 Public-Key
- >>1 byte&0xc0 0xc0 Secret-Subkey
- >0 byte 0x79
- >>1 byte&0xc0 0x00 Compressed Data
- >>1 byte&0xc0 0x40 Symmetrically Encrypted Data
- >>1 byte&0xc0 0x80 Marker
- >>1 byte&0xc0 0xc0 Literal Data
- >0 byte 0x7a
- >>1 byte&0xc0 0x00 Trust
- >>1 byte&0xc0 0x40 User ID
- >>1 byte&0xc0 0x80 Public-Subkey
- >>1 byte&0xc0 0xc0 Unused [z%x]
- >0 byte 0x30
- >>1 byte&0xc0 0x00 Unused [0%x]
- >>1 byte&0xc0 0x40 User Attribute
- >>1 byte&0xc0 0x80 Sym. Encrypted and Integrity Protected Data
- >>1 byte&0xc0 0xc0 Modification Detection Code
- # magic signatures to detect PGP crypto material (from stef)
- # detects and extracts metadata from:
- # - symmetric encrypted packet header
- # - RSA (e=65537) secret (sub-)keys
- # 1024b RSA encrypted data
- 0 string \x84\x8c\x03 PGP RSA encrypted session key -
- >3 belong x keyid: %08X
- >7 belong x %08X
- >11 byte 0x01 RSA (Encrypt or Sign) 1024b
- >11 byte 0x02 RSA Encrypt-Only 1024b
- >12 string \x04\x00
- >12 string \x03\xff
- >12 string \x03\xfe
- >12 string \x03\xfd
- >12 string \x03\xfc
- >12 string \x03\xfb
- >12 string \x03\xfa
- >12 string \x03\xf9
- >142 byte 0xd2 .
- # 2048b RSA encrypted data
- 0 string \x85\x01\x0c\x03 PGP RSA encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x01 RSA (Encrypt or Sign) 2048b
- >12 byte 0x02 RSA Encrypt-Only 2048b
- >13 string \x08\x00
- >13 string \x07\xff
- >13 string \x07\xfe
- >13 string \x07\xfd
- >13 string \x07\xfc
- >13 string \x07\xfb
- >13 string \x07\xfa
- >13 string \x07\xf9
- >271 byte 0xd2 .
- # 3072b RSA encrypted data
- 0 string \x85\x01\x8c\x03 PGP RSA encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x01 RSA (Encrypt or Sign) 3072b
- >12 byte 0x02 RSA Encrypt-Only 3072b
- >13 string \x0c\x00
- >13 string \x0b\xff
- >13 string \x0b\xfe
- >13 string \x0b\xfd
- >13 string \x0b\xfc
- >13 string \x0b\xfb
- >13 string \x0b\xfa
- >13 string \x0b\xf9
- >399 byte 0xd2 .
- # 4096b RSA encrypted data
- 0 string \x85\x02\x0c\x03 PGP RSA encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x01 RSA (Encrypt or Sign) 4096b
- >12 byte 0x02 RSA Encrypt-Only 4096b
- >13 string \x10\x00
- >13 string \x0f\xff
- >13 string \x0f\xfe
- >13 string \x0f\xfd
- >13 string \x0f\xfc
- >13 string \x0f\xfb
- >13 string \x0f\xfa
- >13 string \x0f\xf9
- >527 byte 0xd2 .
- # 8192b RSA encrypted data
- 0 string \x85\x04\x0c\x03 PGP RSA encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x01 RSA (Encrypt or Sign) 8192b
- >12 byte 0x02 RSA Encrypt-Only 8192b
- >13 string \x20\x00
- >13 string \x1f\xff
- >13 string \x1f\xfe
- >13 string \x1f\xfd
- >13 string \x1f\xfc
- >13 string \x1f\xfb
- >13 string \x1f\xfa
- >13 string \x1f\xf9
- >1039 byte 0xd2 .
- # 1024b Elgamal encrypted data
- 0 string \x85\x01\x0e\x03 PGP Elgamal encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x10 Elgamal Encrypt-Only 1024b.
- >13 string \x04\x00
- >13 string \x03\xff
- >13 string \x03\xfe
- >13 string \x03\xfd
- >13 string \x03\xfc
- >13 string \x03\xfb
- >13 string \x03\xfa
- >13 string \x03\xf9
- # 2048b Elgamal encrypted data
- 0 string \x85\x02\x0e\x03 PGP Elgamal encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x10 Elgamal Encrypt-Only 2048b.
- >13 string \x08\x00
- >13 string \x07\xff
- >13 string \x07\xfe
- >13 string \x07\xfd
- >13 string \x07\xfc
- >13 string \x07\xfb
- >13 string \x07\xfa
- >13 string \x07\xf9
- # 3072b Elgamal encrypted data
- 0 string \x85\x03\x0e\x03 PGP Elgamal encrypted session key -
- >4 belong x keyid: %08X
- >8 belong x %08X
- >12 byte 0x10 Elgamal Encrypt-Only 3072b.
- >13 string \x0c\x00
- >13 string \x0b\xff
- >13 string \x0b\xfe
- >13 string \x0b\xfd
- >13 string \x0b\xfc
- >13 string \x0b\xfb
- >13 string \x0b\xfa
- >13 string \x0b\xf9
- # crypto algo mapper
- 0 name crypto
- >0 byte 0x00 Plaintext or unencrypted data
- >0 byte 0x01 IDEA
- >0 byte 0x02 TripleDES
- >0 byte 0x03 CAST5 (128 bit key)
- >0 byte 0x04 Blowfish (128 bit key, 16 rounds)
- >0 byte 0x07 AES with 128-bit key
- >0 byte 0x08 AES with 192-bit key
- >0 byte 0x09 AES with 256-bit key
- >0 byte 0x0a Twofish with 256-bit key
- # hash algo mapper
- 0 name hash
- >0 byte 0x01 MD5
- >0 byte 0x02 SHA-1
- >0 byte 0x03 RIPE-MD/160
- >0 byte 0x08 SHA256
- >0 byte 0x09 SHA384
- >0 byte 0x0a SHA512
- >0 byte 0x0b SHA224
- # display public key algorithms as human readable text
- 0 name key_algo
- >0 byte 0x01 RSA (Encrypt or Sign)
- # keep old look of version 5.28 without parentheses
- >0 byte 0x02 RSA Encrypt-Only
- >0 byte 0x03 RSA (Sign-Only)
- >0 byte 16 ElGamal (Encrypt-Only)
- >0 byte 17 DSA
- >0 byte 18 Elliptic Curve
- >0 byte 19 ECDSA
- >0 byte 20 ElGamal (Encrypt or Sign)
- >0 byte 21 Diffie-Hellman
- >0 default x
- >>0 ubyte <22 unknown (pub %d)
- # this should never happen
- >>0 ubyte >21 invalid (%d)
- # pgp symmetric encrypted data
- 0 byte 0x8c PGP symmetric key encrypted data -
- >1 byte 0x0d
- >1 byte 0x0c
- >2 byte 0x04
- >3 use crypto
- >4 byte 0x01 salted -
- >>5 use hash
- >>14 byte 0xd2 .
- >>14 byte 0xc9 .
- >4 byte 0x03 salted & iterated -
- >>5 use hash
- >>15 byte 0xd2 .
- >>15 byte 0xc9 .
- # encrypted keymaterial needs s2k & can be checksummed/hashed
- 0 name chkcrypto
- >0 use crypto
- >1 byte 0x00 Simple S2K
- >1 byte 0x01 Salted S2K
- >1 byte 0x03 Salted&Iterated S2K
- >2 use hash
- # all PGP keys start with this prolog
- # containing version, creation date, and purpose
- 0 name keyprolog
- >0 byte 0x04
- >1 beldate x created on %s -
- >5 byte 0x01 RSA (Encrypt or Sign)
- >5 byte 0x02 RSA Encrypt-Only
- # end of secret keys known signature
- # contains e=65537 and the prolog to
- # the encrypted parameters
- 0 name keyend
- >0 string \x00\x11\x01\x00\x01 e=65537
- >5 use crypto
- >5 byte 0xff checksummed
- >>6 use chkcrypto
- >5 byte 0xfe hashed
- >>6 use chkcrypto
- # PGP secret keys contain also the public parts
- # these vary by bitsize of the key
- 0 name x1024
- >0 use keyprolog
- >6 string \x03\xfe
- >6 string \x03\xff
- >6 string \x04\x00
- >136 use keyend
- 0 name x2048
- >0 use keyprolog
- >6 string \x80\x00
- >6 string \x07\xfe
- >6 string \x07\xff
- >264 use keyend
- 0 name x3072
- >0 use keyprolog
- >6 string \x0b\xfe
- >6 string \x0b\xff
- >6 string \x0c\x00
- >392 use keyend
- 0 name x4096
- >0 use keyprolog
- >6 string \x10\x00
- >6 string \x0f\xfe
- >6 string \x0f\xff
- >520 use keyend
- # \x00|\x1f[\xfe\xff]).{1024})'
- 0 name x8192
- >0 use keyprolog
- >6 string \x20\x00
- >6 string \x1f\xfe
- >6 string \x1f\xff
- >1032 use keyend
- # depending on the size of the pkt
- # we branch into the proper key size
- # signatures defined as x{keysize}
- 0 name pgpkey
- >0 string \x01\xd8 1024b
- >>2 use x1024
- >0 string \x01\xeb 1024b
- >>2 use x1024
- >0 string \x01\xfb 1024b
- >>2 use x1024
- >0 string \x01\xfd 1024b
- >>2 use x1024
- >0 string \x01\xf3 1024b
- >>2 use x1024
- >0 string \x01\xee 1024b
- >>2 use x1024
- >0 string \x01\xfe 1024b
- >>2 use x1024
- >0 string \x01\xf4 1024b
- >>2 use x1024
- >0 string \x02\x0d 1024b
- >>2 use x1024
- >0 string \x02\x03 1024b
- >>2 use x1024
- >0 string \x02\x05 1024b
- >>2 use x1024
- >0 string \x02\x15 1024b
- >>2 use x1024
- >0 string \x02\x00 1024b
- >>2 use x1024
- >0 string \x02\x10 1024b
- >>2 use x1024
- >0 string \x02\x04 1024b
- >>2 use x1024
- >0 string \x02\x06 1024b
- >>2 use x1024
- >0 string \x02\x16 1024b
- >>2 use x1024
- >0 string \x03\x98 2048b
- >>2 use x2048
- >0 string \x03\xab 2048b
- >>2 use x2048
- >0 string \x03\xbb 2048b
- >>2 use x2048
- >0 string \x03\xbd 2048b
- >>2 use x2048
- >0 string \x03\xcd 2048b
- >>2 use x2048
- >0 string \x03\xb3 2048b
- >>2 use x2048
- >0 string \x03\xc3 2048b
- >>2 use x2048
- >0 string \x03\xc5 2048b
- >>2 use x2048
- >0 string \x03\xd5 2048b
- >>2 use x2048
- >0 string \x03\xae 2048b
- >>2 use x2048
- >0 string \x03\xbe 2048b
- >>2 use x2048
- >0 string \x03\xc0 2048b
- >>2 use x2048
- >0 string \x03\xd0 2048b
- >>2 use x2048
- >0 string \x03\xb4 2048b
- >>2 use x2048
- >0 string \x03\xc4 2048b
- >>2 use x2048
- >0 string \x03\xc6 2048b
- >>2 use x2048
- >0 string \x03\xd6 2048b
- >>2 use x2048
- >0 string \x05X 3072b
- >>2 use x3072
- >0 string \x05k 3072b
- >>2 use x3072
- >0 string \x05{ 3072b
- >>2 use x3072
- >0 string \x05} 3072b
- >>2 use x3072
- >0 string \x05\x8d 3072b
- >>2 use x3072
- >0 string \x05s 3072b
- >>2 use x3072
- >0 string \x05\x83 3072b
- >>2 use x3072
- >0 string \x05\x85 3072b
- >>2 use x3072
- >0 string \x05\x95 3072b
- >>2 use x3072
- >0 string \x05n 3072b
- >>2 use x3072
- >0 string \x05\x7e 3072b
- >>2 use x3072
- >0 string \x05\x80 3072b
- >>2 use x3072
- >0 string \x05\x90 3072b
- >>2 use x3072
- >0 string \x05t 3072b
- >>2 use x3072
- >0 string \x05\x84 3072b
- >>2 use x3072
- >0 string \x05\x86 3072b
- >>2 use x3072
- >0 string \x05\x96 3072b
- >>2 use x3072
- >0 string \x07[ 4096b
- >>2 use x4096
- >0 string \x07\x18 4096b
- >>2 use x4096
- >0 string \x07+ 4096b
- >>2 use x4096
- >0 string \x07; 4096b
- >>2 use x4096
- >0 string \x07= 4096b
- >>2 use x4096
- >0 string \x07M 4096b
- >>2 use x4096
- >0 string \x073 4096b
- >>2 use x4096
- >0 string \x07C 4096b
- >>2 use x4096
- >0 string \x07E 4096b
- >>2 use x4096
- >0 string \x07U 4096b
- >>2 use x4096
- >0 string \x07. 4096b
- >>2 use x4096
- >0 string \x07> 4096b
- >>2 use x4096
- >0 string \x07@ 4096b
- >>2 use x4096
- >0 string \x07P 4096b
- >>2 use x4096
- >0 string \x074 4096b
- >>2 use x4096
- >0 string \x07D 4096b
- >>2 use x4096
- >0 string \x07F 4096b
- >>2 use x4096
- >0 string \x07V 4096b
- >>2 use x4096
- >0 string \x0e[ 8192b
- >>2 use x8192
- >0 string \x0e\x18 8192b
- >>2 use x8192
- >0 string \x0e+ 8192b
- >>2 use x8192
- >0 string \x0e; 8192b
- >>2 use x8192
- >0 string \x0e= 8192b
- >>2 use x8192
- >0 string \x0eM 8192b
- >>2 use x8192
- >0 string \x0e3 8192b
- >>2 use x8192
- >0 string \x0eC 8192b
- >>2 use x8192
- >0 string \x0eE 8192b
- >>2 use x8192
- >0 string \x0eU 8192b
- >>2 use x8192
- >0 string \x0e. 8192b
- >>2 use x8192
- >0 string \x0e> 8192b
- >>2 use x8192
- >0 string \x0e@ 8192b
- >>2 use x8192
- >0 string \x0eP 8192b
- >>2 use x8192
- >0 string \x0e4 8192b
- >>2 use x8192
- >0 string \x0eD 8192b
- >>2 use x8192
- >0 string \x0eF 8192b
- >>2 use x8192
- >0 string \x0eV 8192b
- >>2 use x8192
- # PGP RSA (e=65537) secret (sub-)key header
- 0 byte 0x97 PGP Secret Sub-key -
- >1 use pgpkey
- 0 byte 0x9d
- # Update: Joerg Jenderek
- # secret subkey packet (tag 7) with same structure as secret key packet (tag 5)
- # skip Fetus.Sys16 CALIBUS.MAIN OrbFix.Sys16.Ex by looking for positive len
- >1 ubeshort >0
- #>1 ubeshort x \b, body length %#x
- # next packet type often 88h,89h~(tag 2)~Signature Packet
- #>>(1.S+3) ubyte x \b, next packet type %#x
- # skip Dragon.SHR DEMO.INIT by looking for positive version
- >>3 ubyte >0
- # skip BUISSON.13 GUITAR1 by looking for low version number
- >>>3 ubyte <5 PGP Secret Sub-key
- # sub-key are normally part of secret key. So it does not occur as standalone file
- #!:ext bin
- # version 2,3~old 4~new . Comment following line for version 5.28 look
- >>>>3 ubyte x (v%d)
- >>>>3 ubyte x -
- # old versions 2 or 3 but no real example found
- >>>>3 ubyte <4
- # 2 byte for key bits in version 5.28 look
- >>>>>11 ubeshort x %db
- >>>>>4 beldate x created on %s -
- # old versions use 2 additional bytes after time stamp
- #>>>>>8 ubeshort x %#x
- # display key algorithm 1~RSA Encrypt|Sign - 21~Diffie-Hellman
- >>>>>10 use key_algo
- >>>>>(11.S/8) ubequad x
- # look after first key
- >>>>>>&5 use keyend
- # new version
- >>>>3 ubyte >3
- >>>>>9 ubeshort x %db
- >>>>>4 beldate x created on %s -
- # display key algorithm
- >>>>>8 use key_algo
- >>>>>(9.S/8) ubequad x
- # look after first key for something like s2k
- >>>>>>&3 use keyend
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