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Merge pull request #1495 from dcooper16/fix_pub_key_length_calculation

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Fix public key length calculation
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Dirk Wetter 2020-02-04 21:45:52 +01:00 committed by GitHub
commit 9a0325875e
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1 changed files with 29 additions and 29 deletions
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testssl.sh
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@ -10503,83 +10503,83 @@ get_pub_key_size() {
i=2
len1="0x${pubkey:i:2}"
if [[ $len1 -lt 0x80 ]]; then
i=$i+2
i+=2
else
len1=$len1-0x80
i=$i+2*$len1+2
len1=$((len1-0x80))
i+=$((2*len1+2))
fi
# Skip over algorithm field
i=$i+2
i+=2
len1="0x${pubkey:i:2}"
i=$i+2
i+=2
if [[ $len1 -lt 0x80 ]]; then
i=$i+2*$len1
i+=$((2*len1))
else
case $len1 in
129) len="0x${pubkey:i:2}" ;;
130) len="0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
131) len="0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
132) len="0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
esac
i=$i+2+2*$len
i+=$((2+2*len))
fi
# Next is the public key BIT STRING. Skip over tag, length, and number of unused bits.
i=$i+2
i+=2
len1="0x${pubkey:i:2}"
if [[ $len1 -lt 0x80 ]]; then
i=$i+4
i+=4
else
len1=$len1-0x80
i=$i+2*$len1+4
len1=$((len1-0x80))
i+=$((2*len1+4))
fi
# Now get the length of the public key
i=$i+2
i+=2
len1="0x${pubkey:i:2}"
i=$i+2
i+=2
if [[ $len1 -lt 0x80 ]]; then
len=$len1
else
case $len1 in
129) len="0x${pubkey:i:2}" ;;
130) len="0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
131) len="0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
i=$i+2
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
132) len="0x${pubkey:i:2}"
i=$i+2
len=256*"0x${pubkey:i:2}"
i=$i+2
len=256*"0x${pubkey:i:2}"
i=$i+2
len=256*"0x${pubkey:i:2}"
i+=2
len=256*$len+"0x${pubkey:i:2}"
i+=2
len=256*$len+"0x${pubkey:i:2}"
i+=2
len=256*$len+"0x${pubkey:i:2}"
;;
esac
fi
len=8*$len # convert from bytes to bits
len=$((8*len)) # convert from bytes to bits
pubkeybits="$(printf "%d" $len)"
echo "Server public key is $pubkeybits bit" >> $TMPFILE
fi