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grep -o to the rescue

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The original sed command does not work on FreeBSD

I wanted an all in one extraction sed command, but didn't find it, so this line extracts all the hexadecimal representations and the tls_version placeholder and adds the slash before removing the new line characters
This commit is contained in:
Olivier Paroz 2014-09-24 13:27:56 +02:00
parent 7289d49f6c
commit 4ad8ae7659
1 changed files with 10 additions and 8 deletions
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18
testssl.sh
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@ -1006,11 +1006,11 @@ ccs_injection(){
client_hello="
# TLS header ( 5 bytes)
,x16, # Content type (x16 for handshake)
,x16, # Content type (0x16 for handshake)
x03, tls_version, # TLS Version
x00, x93, # Length
# Handshake header
x01, # Type (x01 for ClientHello)
x01, # Type (0x01 for ClientHello)
x00, x00, x8f, # Length
x03, tls_version, # TLS Version
# Random (32 byte)
@ -1035,8 +1035,9 @@ ccs_injection(){
x00, x07, x00, x06, x00, x05, x00, x04,
x00, x03, x00, x02, x00, x01, x01, x00"
msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' -e 's/[ \t]//g' | tr -d '\n'`
msg=`echo "$client_hello" | grep -o '\bx[[:xdigit:]]\{2\}\b\|tls_version' | sed -e 's/x/\\\x/g' -e 's/tls_version/\\\tls_version/g' | tr -d '\n'`
#msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' -e 's/[ \t]//g' | tr -d '\n'`
fd_socket 5 || return 6
[ $VERBOSE -eq 1 ] && out " sending client hello, "
@ -1104,11 +1105,11 @@ heartbleed(){
client_hello="
# TLS header ( 5 bytes)
,x16, # Content type (x16 for handshake)
,x16, # Content type (0x16 for handshake)
x03, tls_version, # TLS Version
x00, xdc, # Length
# Handshake header
x01, # Type (x01 for ClientHello)
x01, # Type (0x01 for ClientHello)
x00, x00, xd8, # Length
x03, tls_version, # TLS Version
# Random (32 byte)
@ -1133,7 +1134,7 @@ heartbleed(){
x00, x09, x00, x14, x00, x11, x00, x08,
x00, x06, x00, x03, x00, xff,
x01, # Compression methods length
x00, # Compression method (x00 for NULL)
x00, # Compression method (0x00 for NULL)
x00, x49, # Extensions length
# Extension: ec_point_formats
x00, x0b, x00, x04, x03, x00, x01, x02,
@ -1150,7 +1151,8 @@ heartbleed(){
# Extension: Heartbeat
x00, x0f, x00, x01, x01"
msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' -e 's/[ \t]//g' | tr -d '\n'`
msg=`echo "$client_hello" | grep -o '\bx[[:xdigit:]]\{2\}\b\|tls_version' | sed -e 's/x/\\\x/g' -e 's/tls_version/\\\tls_version/g' | tr -d '\n'`
#msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' -e 's/[ \t]//g' | tr -d '\n'`
fd_socket 5 || return 6