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image: add functions to add and remove signatures

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Rather than setting ->sigbuf directly, add two functions to handle image
signature addition and removal:

 image_add_signature(image, sig, sigsize);
 image_remove_signature(image);

And warn when a signature is to be overwritten.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
This commit is contained in:
Jeremy Kerr 2012-08-03 10:03:14 +08:00
parent 36e79114d2
commit d27647ba69
7 changed files with 56 additions and 12 deletions
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9
tests/resign-warning.sh Executable file
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@ -0,0 +1,9 @@
#!/bin/bash -e
. "$srcdir/common.sh"
signed="test.signed"
"$sbsign" --cert "$cert" --key "$key" --output "$signed" "$image"
"$sbsign" --cert "$cert" --key "$key" --output "$signed" "$signed" 2>&1 |
grep '^warning: overwriting'