diff options
Diffstat (limited to 'src/share/m/subkey_to_ssh_agent')
| -rw-r--r-- | src/share/m/subkey_to_ssh_agent | 55 |
1 files changed, 36 insertions, 19 deletions
diff --git a/src/share/m/subkey_to_ssh_agent b/src/share/m/subkey_to_ssh_agent index ec596bd..aa647a6 100644 --- a/src/share/m/subkey_to_ssh_agent +++ b/src/share/m/subkey_to_ssh_agent @@ -37,26 +37,34 @@ subkey_to_ssh_agent() { if [ "$sshaddresponse" = "2" ]; then failure "Could not connect to ssh-agent" fi - - # get list of secret keys (to work around bug - # https://bugs.g10code.com/gnupg/issue945): - secretkeys=$(gpg_user --list-secret-keys --with-colons --fixed-list-mode \ - --fingerprint | \ - grep '^fpr:' | cut -f10 -d: | awk '{ print "0x" $1 "!" }') - - if [ -z "$secretkeys" ]; then - failure "You have no secret keys in your keyring! + + # if the MONKEYSPHERE_SUBKEYS_FOR_AGENT variable is set, use the + # keys specified there + if [ "$MONKEYSPHERE_SUBKEYS_FOR_AGENT" ] ; then + authsubkeys="$MONKEYSPHERE_SUBKEYS_FOR_AGENT" + + # otherwise find all authentication-capable subkeys and use those + else + # get list of secret keys + # (to work around bug https://bugs.g10code.com/gnupg/issue945): + secretkeys=$(gpg_user --list-secret-keys --with-colons --fixed-list-mode \ + --fingerprint | \ + grep '^fpr:' | cut -f10 -d: | awk '{ print "0x" $1 "!" }') + + if [ -z "$secretkeys" ]; then + failure "You have no secret keys in your keyring! You might want to run 'gpg --gen-key'." - fi + fi - authsubkeys=$(gpg_user --list-secret-keys --with-colons --fixed-list-mode \ - --fingerprint --fingerprint $secretkeys | \ - cut -f1,5,10,12 -d: | grep -A1 '^ssb:[^:]*::[^:]*a[^:]*$' | \ - grep '^fpr::' | cut -f3 -d: | sort -u) - - if [ -z "$authsubkeys" ]; then - failure "no authentication-capable subkeys available. -You might want to 'monkeysphere gen-subkey'" + authsubkeys=$(gpg_user --list-secret-keys --with-colons --fixed-list-mode \ + --fingerprint --fingerprint $secretkeys | \ + cut -f1,5,10,12 -d: | grep -A1 '^ssb:[^:]*::[^:]*a[^:]*$' | \ + grep '^fpr::' | cut -f3 -d: | sort -u) + + if [ -z "$authsubkeys" ]; then + failure "no authentication-capable subkeys available. +You might want to run 'monkeysphere gen-subkey'." + fi fi workingdir=$(msmktempdir) @@ -68,7 +76,16 @@ You might want to 'monkeysphere gen-subkey'" # through to ssh-add. should we limit it to known ones? For # example: -d or -c and/or -t <lifetime> - for subkey in $authsubkeys; do + for subkey in $authsubkeys; do + # test that the subkey has proper capability + capability=$(gpg_user --list-secret-keys --with-colons --fixed-list-mode \ + --fingerprint --fingerprint "0x${subkey}!" \ + | egrep -B 1 "^fpr:::::::::${subkey}:$" | grep "^ssb:" | cut -d: -f12) + if ! check_capability "$capability" 'a' ; then + log error "Did not find authentication-capable subkey with key ID '$subkey'." + continue + fi + # choose a label by which this key will be known in the agent: # we are labelling the key by User ID instead of by # fingerprint, but filtering out all / characters to make sure |