OS X security sample to keychain.

osx_security_sample_tk.sh

KEYCHAIN='keychain_baz'

# https://www.unix.com/man-page/osx/1/security/

security delete-keychain "$KEYCHAIN"
security create-keychain -P "$KEYCHAIN"
if test $? -ne 0; then
 echo 'Create keychain error!'; exit 1; fi

SERVICE_NAME='service_foo'
ACCOUNT_NAME='account_bar'
PASSWORD_VALUE="pass_$(date +%s)_bar"

security delete-generic-password -s "$SERVICE_NAME" -a "$ACCOUNT_NAME" "$KEYCHAIN" &> /dev/null

# Add a generic password item to the default keychain.

security add-generic-password -s "$SERVICE_NAME" -a "$ACCOUNT_NAME" -w "$PASSWORD_VALUE" -T '' "$KEYCHAIN"
if test $? -ne 0; then
 echo 'Add password error!'; exit 1; fi

# Find a generic password item and display the password(only) for the item found.

PASSWORD_ACTUAL=$(security find-generic-password -s "$SERVICE_NAME" -a "$ACCOUNT_NAME" -w "$KEYCHAIN")
if test $? -ne 0; then
 echo 'Find password error!'; exit 1; fi
if test "$PASSWORD_ACTUAL" != "$PASSWORD_VALUE"; then
 echo 'Password error!'; exit 1; fi

echo 'Password as expected.'

exit 0