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Merge pull request #2278 from dcooper16/fix_extract_calist

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Fix extract_calist()
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Dirk Wetter 2022-11-24 11:15:10 +01:00 committed by GitHub
commit 6ba21a937a
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1 changed files with 15 additions and 8 deletions
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testssl.sh
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@ -21299,14 +21299,19 @@ print_dn() {
# distinguished names that are in the CA list.
extract_calist() {
local response="$1"
local is_tls13=false
local is_tls12=false is_tls13=false
local certreq calist="" certtypes sigalgs dn
local calist_string=""
local -i len type
# Determine whether this is a TLS 1.3 response, since the information
# is encoded in a different place for TLS 1.3.
[[ "$response" =~ \<\<\<\ TLS\ 1.3[\,]?\ Handshake\ \[length\ [0-9a-fA-F]*\]\,\ CertificateRequest ]] && is_tls13=true
# Determine whether this is a TLS 1.2 or TLS 1.3 response, since the information
# is encoded in a different place for TLS 1.3 and the CertificateRequest message
# differs between TLS 1.2 and TLS 1.1 and earlier.
if [[ "$response" =~ \<\<\<\ TLS\ 1.3[\,]?\ Handshake\ \[length\ [0-9a-fA-F]*\]\,\ CertificateRequest ]]; then
is_tls13=true
elif [[ "$response" =~ \<\<\<\ TLS\ 1.2[\,]?\ Handshake\ \[length\ [0-9a-fA-F]*\]\,\ CertificateRequest ]]; then
is_tls12=true
fi
# Extract just the CertificateRequest message as an ASCII-HEX string.
certreq="${response##*CertificateRequest}"
@ -21342,15 +21347,17 @@ extract_calist() {
# struct {
# ClientCertificateType certificate_types<1..2^8-1>;
# SignatureAndHashAlgorithm
# supported_signature_algorithms<2^16-1>;
# supported_signature_algorithms<2^16-1>; - only present in TLS 1.2
# DistinguishedName certificate_authorities<0..2^16-1>;
# } CertificateRequest;
len=2*$(hex2dec "${certreq:0:2}")
certtypes="${certreq:2:len}"
certreq="${certreq:$((len+2))}"
len=2*$(hex2dec "${certreq:0:4}")
sigalgs="${certreq:4:len}"
certreq="${certreq:$((len+4))}"
if "$is_tls12"; then
len=2*$(hex2dec "${certreq:0:4}")
sigalgs="${certreq:4:len}"
certreq="${certreq:$((len+4))}"
fi
len=2*$(hex2dec "${certreq:0:4}")
calist="${certreq:4:len}"
fi