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authorSehong Na <sehong.na@samsung.com>2014-05-31 12:59:38 +0900
committerSehong Na <sehong.na@samsung.com>2014-05-31 12:59:38 +0900
commitea5d1b004229fb254342c19df832c8e0a8a9007c (patch)
tree2eacddacc76c07aa2048b74a73bcab3c2599c110 /scripts/tgpg
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Diffstat (limited to 'scripts/tgpg')
-rwxr-xr-xscripts/tgpg36
1 files changed, 36 insertions, 0 deletions
diff --git a/scripts/tgpg b/scripts/tgpg
new file mode 100755
index 0000000..238cffb
--- /dev/null
+++ b/scripts/tgpg
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+
+for pkg in $*
+do
+ if [ "$pkg" = "" -o ! -e "$pkg" ]; then
+ echo "no package supplied" 1>&2
+ exit 1
+ fi
+
+ plaintext=`mktemp ${TMPDIR:-/tmp}/tgpg-$$.XXXXXX`
+ detached=`mktemp ${TMPDIR:-/tmp}/tgpg-$$.XXXXXX`
+
+# --- Extract detached signature
+ rpm -qp -vv --qf '%{siggpg:armor}' $pkg > $detached
+
+# --- Figger the offset of header+payload in the package
+ leadsize=96
+ o=`expr $leadsize + 8`
+
+ set `od -j $o -N 8 -t u1 $pkg`
+ il=`expr 256 \* \( 256 \* \( 256 \* $2 + $3 \) + $4 \) + $5`
+ dl=`expr 256 \* \( 256 \* \( 256 \* $6 + $7 \) + $8 \) + $9`
+
+ sigsize=`expr 8 + 16 \* $il + $dl`
+ o=`expr $o + $sigsize + \( 8 - \( $sigsize \% 8 \) \) \% 8`
+
+# --- Extract header+payload
+ dd if=$pkg ibs=$o skip=1 2>/dev/null > $plaintext
+
+# --- Verify DSA signature using gpg
+ gpg --batch -vv --debug 0xfc02 --verify $detached $plaintext
+
+# --- Clean up
+ rm -f $detached $plaintext
+done