httpkadmind: Allow host SPNs to fetch selves
Combined with the synthetic_clients feature, this will allow hosts that have a PKINIT-worthy client certificate with a SAN with their host principals to create their own principals and "extract" their host keytabs. Together with some other PKIX credential bootstrapping protocol, this can help hosts bootstrap Kerberos host credentials.
This commit is contained in:
Nicolas Williams
@@ -65,7 +65,8 @@ restport2=@restport2@
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server=datan.test.h5l.se
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otherserver=other.test.h5l.se
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cache="FILE:${objdir}/cache.krb5"
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admincache="FILE:${objdir}/cache2.krb5"
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cache2="FILE:${objdir}/cache2.krb5"
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admincache="FILE:${objdir}/cache3.krb5"
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keyfile="${hx509_data}/key.der"
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keyfile2="${hx509_data}/key2.der"
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kt=${objdir}/kt
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@@ -81,10 +82,14 @@ kadmind="${kadmind} --keytab=${keytab} --detach -p $admport"
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httpkadmind2="${httpkadmind} --reverse-proxied -T Negotiate -p $restport2"
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httpkadmind="${httpkadmind} --reverse-proxied -T Negotiate -p $restport1"
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kinit2="${kinit} -c $cache2 ${afs_no_afslog}"
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kinit="${kinit} -c $cache ${afs_no_afslog}"
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adminklist="${klist} --hidden -v -c $admincache"
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klist2="${klist} --hidden -v -c $cache2"
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klist="${klist} --hidden -v -c $cache"
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kgetcred2="${kgetcred} -c $cache2"
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kgetcred="${kgetcred} -c $cache"
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kdestroy2="${kdestroy} -c $cache2 ${afs_no_unlog}"
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kdestroy="${kdestroy} -c $cache ${afs_no_unlog}"
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kx509="${kx509} -c $cache"
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@@ -159,11 +164,11 @@ get_keytab_POST() {
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get_keytab "$q" -X POST --data-binary @/dev/null -f "$@" &&
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{ echo "POST succeeded w/o CSRF token!"; return 1; }
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get_keytab "$q" -X POST --data-binary @/dev/null -D response-headers "$@"
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grep ^X-CSRF-Token: response-headers >/dev/null ||
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{ echo "POST w/o CSRF token had response w/o CSRF token!"; return 1; }
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get_keytab "$q" -X POST --data-binary @/dev/null -f \
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grep ^X-CSRF-Token: response-headers >/dev/null || return 1
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get_keytab "$q" -X POST --data-binary @/dev/null -D response-headers \
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-H "$(sed -e 's/\r//' response-headers | grep ^X-CSRF-Token:)" "$@"
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return $?
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grep '^HTTP/1.1 200' response-headers >/dev/null || return $?
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return 0
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}
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get_keytab_POST_redir() {
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@@ -481,6 +486,38 @@ $kimpersonate --ticket-flags=initial --ccache=$admincache -k $keytab -t aes128-c
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$adminklist -t >/dev/null ||
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{ echo "failed to setup kimpersonate credentials"; exit 2; }
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echo "Making PKINIT certs for KDC"
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${hxtool} issue-certificate \
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--self-signed \
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--issue-ca \
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--ca-private-key=FILE:${keyfile} \
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--subject="CN=CA,DC=test,DC=h5l,DC=se" \
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--certificate="FILE:ca.crt" || exit 1
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${hxtool} request-create \
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--subject="CN=kdc,DC=test,DC=h5l,DC=se" \
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--key=FILE:${keyfile2} \
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req-kdc.der || exit 1
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${hxtool} issue-certificate \
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--ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
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--type="pkinit-kdc" \
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--pk-init-principal="krbtgt/TEST.H5L.SE@TEST.H5L.SE" \
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--req="PKCS10:req-kdc.der" \
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--certificate="FILE:kdc.crt" || exit 1
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${hxtool} request-create \
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--subject="CN=bar,DC=test,DC=h5l,DC=se" \
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--key=FILE:${keyfile2} \
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req-pkinit.der ||
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{ echo "Failed to make CSR for PKINIT client cert"; exit 1; }
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${hxtool} issue-certificate \
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--ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
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--type="pkinit-client" \
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--pk-init-principal="host/synthesized.${domain}@$R" \
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--req="PKCS10:req-pkinit.der" \
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--lifetime=7d \
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--certificate="FILE:pkinit-synthetic.crt" ||
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{ echo "Failed to make PKINIT client cert"; exit 1; }
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echo "Starting kdc needed for httpkadmind authentication to kadmind"
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${kdc} --detach --testing || { echo "kdc failed to start"; exit 1; }
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kdcpid=`getpid kdc`
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@@ -585,6 +622,50 @@ cmp extracted_keytab.rest1 extracted_keytab.rest2 > /dev/null &&
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test "$(grep $p extracted_keytab.rest2 | wc -l)" -eq 3 ||
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{ echo "Wrong number of new keys!"; exit 1; }
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echo "Checking that host services as clients can self-serve"
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hn=synthesized.${domain}
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p=host/$hn
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KRB5CCNAME=$admincache ${kadmin} get -s $p &&
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{ echo "Internal error -- $p exists too soon"; exit 1; }
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${kinit2} -C "FILE:${objdir}/pkinit-synthetic.crt,${keyfile2}" ${p}@${R} || \
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{ echo "Failed to kinit with PKINIT client cert"; exit 1; }
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${kgetcred2} HTTP/localhost@$R || echo WAT
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${klist2}
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rm -f extracted_keytab*
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KRB5CCNAME=$cache2 \
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get_keytab_POST "spn=$p&create=true" -s -o "${objdir}/extracted_keytab" ||
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{ echo "Failed to create and extract host keys for self"; exit 1; }
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${ktutil} -k "${objdir}/extracted_keytab" list ||
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{ echo "Failed to create and extract host keys for self (bogus keytab)"; exit 1; }
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KRB5CCNAME=$admincache ${kadmin} get -s $p ||
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{ echo "Failed to create and extract host keys for self"; exit 1; }
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echo "Checking that host services can't get other host service principals"
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hn=nonexistent.${domain}
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p=host/$hn
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KRB5CCNAME=$cache2 \
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get_keytab_POST "spn=$p&create=true" -s -o "${objdir}/extracted_keytab2" &&
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{ echo "Failed to fail to create and extract host keys for other!"; exit 1; }
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${ktutil} -k "${objdir}/extracted_keytab2" list || true
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KRB5CCNAME=$admincache ${kadmin} get -s $p &&
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{ echo "Failed to fail to create and extract host keys for other!"; exit 1; }
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echo "Checking that host services can't get keys for themselves and others"
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hn=synthesized.${domain}
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p=host/$hn
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p2=host/nonexistent.${domain}
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${kinit2} -C "FILE:${objdir}/pkinit-synthetic.crt,${keyfile2}" ${p}@${R} || \
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{ echo "Failed to kinit with PKINIT client cert"; exit 1; }
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${kgetcred2} HTTP/localhost@$R || echo WAT
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${klist2}
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rm -f extracted_keytab*
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KRB5CCNAME=$cache2 \
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get_keytab_POST "spn=$p&spn=$p2&create=true" -s -o "${objdir}/extracted_keytab" &&
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{ echo "Failed to fail to create and extract host keys for other!"; exit 1; }
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${ktutil} -k "${objdir}/extracted_keytab2" list || true
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KRB5CCNAME=$admincache ${kadmin} get -s $p2 &&
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{ echo "Failed to fail to create and extract host keys for other!"; exit 1; }
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grep 'Internal error' messages.log &&
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{ echo "Internal errors in log"; exit 1; }
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@@ -593,7 +674,10 @@ sh ${leaks_kill} kadmind $kadmindpid || ec=1
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sh ${leaks_kill} kadmind $kadmind2pid || ec=1
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sh ${leaks_kill} kdc $kdcpid || ec=1
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trap "" EXIT
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if [ $ec = 0 ]; then
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trap "" EXIT
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echo "Success"
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fi
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# TODO
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#
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