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sm: Support AES-GCM decryption.

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* tests/cms/samplemsgs/: Add sample messages.
* sm/gpgsm.c (main): Use gpgrt_fcancel on decryption error.
* sm/decrypt.c (decrypt_gcm_filter): New.
(gpgsm_decrypt): Use this filter if requested.  Check authtag.
--

Note that the sample message pwri-sample.gcm.p7m is broken: The
authtag is duplicated to the authEncryptedContentInfo.  I used a
temporary code during testing hack to that test message out.
This commit is contained in:
Werner Koch 2021-06-02 11:03:55 +02:00
parent a8209b001c
commit 4980fb3c6d
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
8 changed files with 96 additions and 7 deletions
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4
tests/cms/Makefile.am
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@ -86,6 +86,10 @@ EXTRA_DIST = $(XTESTS) $(KEYS) $(CERTS) $(TEST_FILES) \
samplekeys/cert_g10code_pete1.pem \
samplekeys/cert_g10code_test1.pem \
samplekeys/cert_g10code_theo1.pem \
samplemsgs/README \
samplemsgs/pwri-sample.cbc.p7m \
samplemsgs/pwri-sample.cbc-2.p7m \
samplemsgs/pwri-sample.gcm.p7m \
text-1.txt text-2.txt text-3.txt \
text-1.osig.pem text-1.dsig.pem text-1.osig-bad.pem \
text-2.osig.pem text-2.osig-bad.pem \