blob: 1e2f9dda46d9d936203b7bf5ee3f4c6f29632586 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
# $OpenBSD: sshsig.sh,v 1.4 2020/03/13 03:18:45 djm Exp $
# Placed in the Public Domain.
tid="sshsig"
DATA2=$OBJ/${DATANAME}.2
cat ${DATA} ${DATA} > ${DATA2}
rm -f $OBJ/sshsig-*.sig $OBJ/wrong-key* $OBJ/sigca-key*
sig_namespace="test-$$"
sig_principal="user-$$@example.com"
# Make a "wrong key"
${SSHKEYGEN} -t ed25519 -f $OBJ/wrong-key -C "wrong trousers, Grommit" -N '' \
|| fatal "couldn't generate key"
WRONG=$OBJ/wrong-key.pub
# Make a CA key.
${SSHKEYGEN} -t ed25519 -f $OBJ/sigca-key -C "CA" -N '' \
|| fatal "couldn't generate key"
CA_PRIV=$OBJ/sigca-key
CA_PUB=$OBJ/sigca-key.pub
trace "start agent"
eval `${SSHAGENT} ${EXTRA_AGENT_ARGS} -s` > /dev/null
r=$?
if [ $r -ne 0 ]; then
fatal "could not start ssh-agent: exit code $r"
fi
SIGNKEYS="$SSH_KEYTYPES"
verbose "$tid: make certificates"
for t in $SSH_KEYTYPES ; do
${SSHKEYGEN} -q -s $CA_PRIV -z $$ \
-I "regress signature key for $USER" \
-n $sig_principal $OBJ/${t} || \
fatal "couldn't sign ${t}"
SIGNKEYS="$SIGNKEYS ${t}-cert.pub"
done
for t in $SIGNKEYS; do
verbose "$tid: check signature for $t"
keybase=`basename $t .pub`
privkey=${OBJ}/`basename $t -cert.pub`
sigfile=${OBJ}/sshsig-${keybase}.sig
sigfile_agent=${OBJ}/sshsig-agent-${keybase}.sig
pubkey=${OBJ}/${keybase}.pub
${SSHKEYGEN} -vvv -Y sign -f ${OBJ}/$t -n $sig_namespace \
< $DATA > $sigfile 2>/dev/null || fail "sign using $t failed"
(printf "$sig_principal " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 || \
fail "failed signature for $t key"
(printf "$sig_principal namespaces=\"$sig_namespace,whatever\" ";
cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 || \
fail "failed signature for $t key w/ limited namespace"
# Invalid option
(printf "$sig_principal octopus " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key with bad signers option"
# Wrong key trusted.
(printf "$sig_principal " ; cat $WRONG) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key with wrong key trusted"
# incorrect data
(printf "$sig_principal " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA2 >/dev/null 2>&1 && \
fail "passed signature for wrong data with $t key"
# wrong principal in signers
(printf "josef.k@example.com " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key with wrong principal"
# wrong namespace
(printf "$sig_principal " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n COWS_COWS_COWS \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key with wrong namespace"
# namespace excluded by option
(printf "$sig_principal namespaces=\"whatever\" " ;
cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key with excluded namespace"
# public key in revoked keys file
cat $pubkey > $OBJ/revoked_keys
(printf "$sig_principal namespaces=\"whatever\" " ;
cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
-r $OBJ/revoked_keys \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t key, but key is in revoked_keys"
# public key not revoked, but other are present in revoked_keysfile
cat $WRONG > $OBJ/revoked_keys
(printf "$sig_principal " ; cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
-r $OBJ/revoked_keys \
< $DATA >/dev/null 2>&1 || \
fail "couldn't verify signature for $t key, but key not in revoked_keys"
# check-novalidate with valid data
${SSHKEYGEN} -vvv -Y check-novalidate -s $sigfile -n $sig_namespace \
< $DATA >/dev/null 2>&1 || \
fail "failed to check valid signature for $t key"
# check-novalidate with invalid data
${SSHKEYGEN} -vvv -Y check-novalidate -s $sigfile -n $sig_namespace \
< $DATA2 >/dev/null 2>&1 && \
fail "succeeded checking signature for $t key with invalid data"
# Check signing keys using ssh-agent.
${SSHADD} -D >/dev/null 2>&1 # Remove all previously-loaded keys.
${SSHADD} ${privkey} > /dev/null 2>&1 || fail "ssh-add failed"
# Move private key to ensure agent key is used
mv ${privkey} ${privkey}.tmp
${SSHKEYGEN} -vvv -Y sign -f $pubkey -n $sig_namespace \
< $DATA > $sigfile_agent 2>/dev/null || \
fail "ssh-agent based sign using $pubkey failed"
${SSHKEYGEN} -vvv -Y check-novalidate -s $sigfile_agent \
-n $sig_namespace < $DATA >/dev/null 2>&1 || \
fail "failed to check valid signature for $t key"
# Move private key back
mv ${privkey}.tmp ${privkey}
# Remaining tests are for certificates only.
case "$keybase" in
*-cert) ;;
*) continue ;;
esac
# correct CA key
(printf "$sig_principal cert-authority " ;
cat $CA_PUB) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 || \
fail "failed signature for $t cert"
# signing key listed as cert-authority
(printf "$sig_principal cert-authority" ;
cat $pubkey) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature with $t key listed as CA"
# CA key not flagged cert-authority
(printf "$sig_principal " ; cat $CA_PUB) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t cert with CA not marked"
# mismatch between cert principal and file
(printf "josef.k@example.com cert-authority" ;
cat $CA_PUB) > $OBJ/allowed_signers
${SSHKEYGEN} -vvv -Y verify -s $sigfile -n $sig_namespace \
-I $sig_principal -f $OBJ/allowed_signers \
< $DATA >/dev/null 2>&1 && \
fail "accepted signature for $t cert with wrong principal"
done
trace "kill agent"
${SSHAGENT} -k > /dev/null
|
