janusgraph - store a password encrypted using bcrypt

Question

I am using janusgraph with cassandra as storage backend. I am using a node package called as bcrypt to encrypt a password before saving it. The data type for that property in janusgraph is String. This is the password hash string which got generated - $2a$10$JSR6FClewTOHGxwpt/F0AePRzGnKvV2L9gj4TL1dA9fQERLWrig7u

This is the error I am getting while trying to save it in the db:

"message": "startup failed:\nScript88.groovy: 1: illegal string body character after dollar sign;\n   solution: either escape a literal dollar sign \"\\$5\" or bracket the value expression \"${5}\" @ line 1, column 228.\n   elf_reg_ind\",\"2\",\"self_reg_pw\",\"$2a$10$J\n                                 ^\n\n1 error\n",
  "Exception-Class": "org.codehaus.groovy.control.MultipleCompilationErrorsException"

Please let me know if you need any other info.

score 1 · Accepted Answer · answered Oct 08 '17 at 21:13

The query you are passing to the server gets compiled with Groovy, and Groovy is attempting to resolve the $ as an identifier. You have a literal $ in your hash, so you need to put a \ in front of each $ to escape it. For example:

{ "gremlin":
    "g.V(1234).property('hash', '\$2a\$10\$JSR6FClewTOHGxwpt/F0AePRzGnKvV2L9gj4TL1dA9fQERLWrig7u')"
}

score 0 · Answer 2 · answered Nov 11 '17 at 02:22

Not a groovy guru myself, but I realised this evaluation is only attempted when using double quotes so I managed to solve this issue by ensuring that I use single quotes. I'm using PHP so the process is to first json_encode then interchange double quotes for single quotes taking care of any already escaped quotes (if any) in between.

janusgraph - store a password encrypted using bcrypt

2 Answers2