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postgres/contrib/pgcrypto/sql/pgp-decrypt.sql
Jacob Champion d97b3f58c1 pgcrypto: Add option to revert to prior decryption behavior 
The previous commit raises an ERROR during PGP operations if OpenSSL
does not support the cipher in use. However, any existing messages
created with faulty encryption will no longer be accessible via
pgp_[sym|pub]_decrypt().

To help users out of this situation, add a new ignore-cipher-failure
option which reverts to the broken behavior during decryption only. A
faulty encryption wrapper, created by an OpenSSL configuration that does
not support the cipher, can then be stripped back off by that same
OpenSSL in order to safely reencrypt it. (Note that when OpenSSL does
support the cipher, corrupted messages will not be decrypted regardless
of the ignore-cipher-failure setting; this is unchanged.)

The new tests add a corrupted Blowfish message for both public- and
symmetric-key decryption, resulting in the following test matrix:

- Blowfish supported, default behavior:      fails to decrypt
- Blowfish supported, ignore-cipher-failure: fails to decrypt
- Blowfish unsupported, default behavior:    fails to load cipher
- Blowfish unsupported, ignore-cipher-failure: strips faulty encryption

The previous commit's change to the pubkey tests is expanded similarly:
correctly encrypted messages cannot be decrypted by an OpenSSL that does
not support the cipher, regardless of the option's setting, though the
failure mode will change.

Suggested-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Noah Misch <noah@leadboat.com>
Security: CVE-2026-14663
Backpatch-through: 14
2026-08-10 06:38:06 -07:00

357 lines
9.9 KiB
SQL
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--
-- pgp decrypt tests
--
-- Checking ciphers
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.blowfish.sha1.mdc.s2k3.z0
jA0EBAMCfFNwxnvodX9g0jwB4n4s26/g5VmKzVab1bX1SmwY7gvgvlWdF3jKisvS
yA6Ce1QTMK3KdL2MPfamsTUSAML8huCJMwYQFfE=
=JcP+
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCci97v0Q6Z0Zg0kQBsVf5Oe3iC+FBzUmuMV9KxmAyOMyjCc/5i8f1Eest
UTAsG35A1vYs02VARKzGz6xI2UHwFUirP+brPBg3Ee7muOx8pA==
=XtrP
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes192.sha1.mdc.s2k3.z0
jA0ECAMCI7YQpWqp3D1g0kQBCjB7GlX7+SQeXNleXeXQ78ZAPNliquGDq9u378zI
5FPTqAhIB2/2fjY8QEIs1ai00qphjX2NitxV/3Wn+6dufB4Q4g==
=rCZt
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes256.sha1.mdc.s2k3.z0
jA0ECQMC4f/5djqCC1Rg0kQBTHEPsD+Sw7biBsM2er3vKyGPAQkuTBGKC5ie7hT/
lceMfQdbAg6oTFyJpk/wH18GzRDphCofg0X8uLgkAKMrpcmgog==
=fB6S
-----END PGP MESSAGE-----
'), 'foobar');
-- Checking MDC modes
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.nomdc.s2k3.z0
jA0EBwMCnv07rlXqWctgyS2Dm2JfOKCRL4sLSLJUC8RS2cH7cIhKSuLitOtyquB+
u9YkgfJfsuRJmgQ9tmo=
=60ui
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCEeP3idNjQ1Bg0kQBf4G0wX+2QNzLh2YNwYkQgQkfYhn/hLXjV4nK9nsE
8Ex1Dsdt5UPvOz8W8VKQRS6loOfOe+yyXil8W3IYFwUpdDUi+Q==
=moGf
-----END PGP MESSAGE-----
'), 'foobar');
-- Checking hashes
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.md5.mdc.s2k3.z0
jA0EBwMClrXXtOXetohg0kQBn0Kl1ymevQZRHkdoYRHgzCwSQEiss7zYff2UNzgO
KyRrHf7zEBuZiZ2AG34jNVMOLToj1jJUg5zTSdecUzQVCykWTA==
=NyLk
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCApbdlrURoWJg0kQBzHM/E0o7djY82bNuspjxjAcPFrrtp0uvDdMQ4z2m
/PM8jhgI5vxFYfNQjLl8y3fHYIomk9YflN9K/Q13iq8A8sjeTw==
=FxbQ
-----END PGP MESSAGE-----
'), 'foobar');
-- Checking S2K modes
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k0.z0
jAQEBwAC0kQBKTaLAKE3xzps+QIZowqRNb2eAdzBw2LxEW2YD5PgNlbhJdGg+dvw
Ah9GXjGS1TVALzTImJbz1uHUZRfhJlFbc5yGQw==
=YvkV
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k1.z0
jAwEBwEC/QTByBLI3b/SRAHPxKzI6SZBo5lAEOD+EsvKQWO4adL9tDY+++Iqy1xK
4IaWXVKEj9R2Lr2xntWWMGZtcKtjD2lFFRXXd9dZp1ZThNDz
=dbXm
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCEq4Su3ZqNEJg0kQB4QG5jBTKF0i04xtH+avzmLhstBNRxvV3nsmB3cwl
z+9ZaA/XdSx5ZiFnMym8P6r8uY9rLjjNptvvRHlxIReF+p9MNg==
=VJKg
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes192.sha1.mdc.s2k0.z0
jAQECAAC0kQBBDnQWkgsx9YFaqDfWmpsiyAJ6y2xG/sBvap1dySYEMuZ+wJTXQ9E
Cr3i2M7TgVZ0M4jp4QL0adG1lpN5iK7aQeOwMw==
=cg+i
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes192.sha1.mdc.s2k1.z0
jAwECAECruOfyNDFiTnSRAEVoGXm4A9UZKkWljdzjEO/iaE7mIraltIpQMkiqCh9
7h8uZ2u9uRBOv222fZodGvc6bvq/4R4hAa/6qSHtm8mdmvGt
=aHmC
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes192.sha1.mdc.s2k3.z0
jA0ECAMCjFn6SRi3SONg0kQBqtSHPaD0m7rXfDAhCWU/ypAsI93GuHGRyM99cvMv
q6eF6859ZVnli3BFSDSk3a4e/pXhglxmDYCfjAXkozKNYLo6yw==
=K0LS
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes256.sha1.mdc.s2k0.z0
jAQECQAC0kQB4L1eMbani07XF2ZYiXNK9LW3v8w41oUPl7dStmrJPQFwsdxmrDHu
rQr3WbdKdY9ufjOE5+mXI+EFkSPrF9rL9NCq6w==
=RGts
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes256.sha1.mdc.s2k1.z0
jAwECQECKHhrou7ZOIXSRAHWIVP+xjVQcjAVBTt+qh9SNzYe248xFTwozkwev3mO
+KVJW0qhk0An+Y2KF99/bYFl9cL5D3Tl43fC8fXGl3x3m7pR
=SUrU
-----END PGP MESSAGE-----
'), 'foobar');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes256.sha1.mdc.s2k3.z0
jA0ECQMCjc8lwZu8Fz1g0kQBkEzjImi21liep5jj+3dAJ2aZFfUkohi8b3n9z+7+
4+NRzL7cMW2RLAFnJbiqXDlRHMwleeuLN1up2WIxsxtYYuaBjA==
=XZrG
-----END PGP MESSAGE-----
'), 'foobar');
-- Checking longer passwords
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCx6dBiuqrYNRg0kQBEo63AvA1SCslxP7ayanLf1H0/hlk2nONVhTwVEWi
tTGup1mMz6Cfh1uDRErUuXpx9A0gdMu7zX0o5XjrL7WGDAZdSw==
=XKKG
-----END PGP MESSAGE-----
'), '0123456789abcdefghij');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCBDvYuS990iFg0kQBW31UK5OiCjWf5x6KJ8qNNT2HZWQCjCBZMU0XsOC6
CMxFKadf144H/vpoV9GA0f22keQgCl0EsTE4V4lweVOPTKCMJg==
=gWDh
-----END PGP MESSAGE-----
'), '0123456789abcdefghij2jk4h5g2j54khg23h54g2kh54g2khj54g23hj54');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCqXbFafC+ofVg0kQBejyiPqH0QMERVGfmPOjtAxvyG5KDIJPYojTgVSDt
FwsDabdQUz5O7bgNSnxfmyw1OifGF+W2bIn/8W+0rDf8u3+O+Q==
=OxOF
-----END PGP MESSAGE-----
'), 'x');
-- Checking various data
select digest(pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat1.aes.sha1.mdc.s2k3.z0
jA0EBwMCGJ+SpuOysINg0kQBJfSjzsW0x4OVcAyr17O7FBvMTwIGeGcJd99oTQU8
Xtx3kDqnhUq9Z1fS3qPbi5iNP2A9NxOBxPWz2JzxhydANlgbxg==
=W/ik
-----END PGP MESSAGE-----
'), '0123456789abcdefghij'), 'sha1');
select digest(pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat2.aes.sha1.mdc.s2k3.z0
jA0EBwMCvdpDvidNzMxg0jUBvj8eS2+1t/9/zgemxvhtc0fvdKGGbjH7dleaTJRB
SaV9L04ky1qECNDx3XjnoKLC+H7IOQ==
=Fxen
-----END PGP MESSAGE-----
'), '0123456789abcdefghij'), 'sha1');
select digest(pgp_sym_decrypt_bytea(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: dat3.aes.sha1.mdc.s2k3.z0
jA0EBwMCxQvxJZ3G/HRg0lgBeYmTa7/uDAjPyFwSX4CYBgpZWVn/JS8JzILrcWF8
gFnkUKIE0PSaYFp+Yi1VlRfUtRQ/X/LYNGa7tWZS+4VQajz2Xtz4vUeAEiYFYPXk
73Hb8m1yRhQK
=ivrD
-----END PGP MESSAGE-----
'), '0123456789abcdefghij'), 'sha1');
-- Checking CRLF
select digest(pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: crlf mess
ww0ECQMCt7VAtby6l4Bi0lgB5KMIZiiF/b3CfMfUyY0eDncsGXtkbu1X+l9brjpMP8eJnY79Amms
a3nsOzKTXUfS9VyaXo8IrncM6n7fdaXpwba/3tNsAhJG4lDv1k4g9v8Ix2dfv6Rs
=mBP9
-----END PGP MESSAGE-----
'), 'key', 'convert-crlf=0'), 'sha1');
select digest(pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
Comment: crlf mess
ww0ECQMCt7VAtby6l4Bi0lgB5KMIZiiF/b3CfMfUyY0eDncsGXtkbu1X+l9brjpMP8eJnY79Amms
a3nsOzKTXUfS9VyaXo8IrncM6n7fdaXpwba/3tNsAhJG4lDv1k4g9v8Ix2dfv6Rs
=mBP9
-----END PGP MESSAGE-----
'), 'key', 'convert-crlf=1'), 'sha1');
-- check BUG #11905, problem with messages 6 less than a power of 2.
select pgp_sym_decrypt(pgp_sym_encrypt(repeat('x',65530),'1'),'1') = repeat('x',65530);
-- Negative tests
-- Decryption with a certain incorrect key yields an apparent Literal Data
-- packet reporting its content to be binary data. Ciphertext source:
-- iterative pgp_sym_encrypt('secret', 'key') until the random prefix gave
-- rise to that property.
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
ww0EBwMCxf8PTrQBmJdl0jcB6y2joE7GSLKRv7trbNsF5Z8ou5NISLUg31llVH/S0B2wl4bvzZjV
VsxxqLSPzNLAeIspJk5G
=mSd/
-----END PGP MESSAGE-----
'), 'wrong-key', 'debug=1');
-- Routine text/binary mismatch.
select pgp_sym_decrypt(pgp_sym_encrypt_bytea('P', 'key'), 'key', 'debug=1');
-- NUL byte in text decrypt. Ciphertext source:
-- printf 'a\x00\xc' | gpg --homedir /nonexistent \
-- --personal-compress-preferences uncompressed --textmode \
-- --personal-cipher-preferences aes --no-emit-version --batch \
-- --symmetric --passphrase key --armor
do $$
begin
perform pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
jA0EBwMCXLc8pozB10Fg0jQBVUID59TLvWutJp0j6eh9ZgjqIRzdYaIymFB8y4XH
vu0YlJP5D5BX7yqZ+Pry7TlDmiFO
=rV7z
-----END PGP MESSAGE-----
'), 'key', 'debug=1');
exception when others then
raise '%',
regexp_replace(sqlerrm, 'encoding "[^"]*"', 'encoding [REDACTED]');
end
$$;
-- Decryption with a certain incorrect key yields an apparent BZip2-compressed
-- plaintext. Ciphertext source: iterative pgp_sym_encrypt('secret', 'key')
-- until the random prefix gave rise to that property.
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
ww0EBwMC9rK/dMkF5Zlt0jcBlzAQ1mQY2qYbKYbw8h3EZ5Jk0K2IiY92R82TRhWzBIF/8cmXDPtP
GXsd65oYJZp3Khz0qfyn
=Nmpq
-----END PGP MESSAGE-----
'), 'wrong-key', 'debug=1');
-- Routine use of BZip2 compression. Ciphertext source:
-- echo x | gpg --homedir /nonexistent --personal-compress-preferences bzip2 \
-- --personal-cipher-preferences aes --no-emit-version --batch \
-- --symmetric --passphrase key --armor
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
jA0EBwMCRhFrAKNcLVJg0mMBLJG1cCASNk/x/3dt1zJ+2eo7jHfjgg3N6wpB3XIe
QCwkWJwlBG5pzbO5gu7xuPQN+TbPJ7aQ2sLx3bAHhtYb0i3vV9RO10Gw++yUyd4R
UCAAw2JRIISttRHMfDpDuZJpvYo=
=AZ9M
-----END PGP MESSAGE-----
'), 'key', 'debug=1');
-- Check ignore-cipher-failure. This message isn't actually encrypted; it was
-- created with cipher-algo=bf using an OpenSSL that didn't actually support
-- Blowfish. After the fix for CVE-2026-14663, we no longer create these broken
-- ciphertexts, but we allow users to return to the previous behavior during
-- decryption so that the bad wrapper can be stripped.
--
-- Note that if Blowfish is supported by the linked OpenSSL, both decryptions
-- will fail.
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
ww0EBAMC8wIKbtvzJtxi0jABUleCwFJWGCkYKcsNdABqdtXaU2VjcmV0LtMUlnPH3A2QBmZrcucm
1GPb/s2Bkdg=
=6aqD
-----END PGP MESSAGE-----
'), 'wrong key');
select pgp_sym_decrypt(dearmor('
-----BEGIN PGP MESSAGE-----
ww0EBAMC8wIKbtvzJtxi0jABUleCwFJWGCkYKcsNdABqdtXaU2VjcmV0LtMUlnPH3A2QBmZrcucm
1GPb/s2Bkdg=
=6aqD
-----END PGP MESSAGE-----
'), 'wrong key', 'ignore-cipher-failure=1');
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