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agent: New option --auto-expand-secmem.

* agent/gpg-agent.c (oAutoExpandSecmem): New enum value.
(opts): New option --auto-expand-secmem.
(main): Implement that option.
--

Note that this option has an effect only if Libgcrypt >= 1.8.2 is
used.

GnuPG-bug-id: 3530
This commit is contained in:
Werner Koch 2017-11-24 10:30:25 +01:00
parent 531182b7f8
commit 18af15249d
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
2 changed files with 22 additions and 0 deletions

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@ -652,6 +652,17 @@ Select the digest algorithm used to compute ssh fingerprints that are
communicated to the user, e.g. in pinentry dialogs. OpenSSH has
transitioned from using MD5 to the more secure SHA256.
@item --auto-expand-secmem @var{n}
@opindex auto-expand-secmem
gAllow Libgcrypt to expand its secure memory area as required. The
optional value @var{n} is a non-negative integer with a suggested size
in bytes of each additionally allocated secure memory area. The value
is rounded up to the next 32 KiB; usual C style prefixes are allowed.
For an heavy loaded gpg-agent with many concurrent connection this
option avoids sign or decrypt errors due to out of secure memory error
returns.
@item --s2k-count @var{n}
@opindex s2k-count
Specify the iteration count used to protect the passphrase. This