source: examples/creddy_prover_tests/fruits_rt2/README @ 880e924

#!/bin/sh
#
# This demonstrates assigning objects to object sets (osets) based on their
# membership in other sets.  In this case there are 3 prinicpals. Mary and Bob
# are encoding what fruits they are willing to eat in the oset Bob.what2eat and
# Mary.what2eat.  Ralphs is defining the prices of the fruits it sells by
# assigning them to osets parameterized by price.
#
# Credential 1 lays out Mary's policy - she will eat fruits that cost less that
# or equal to 2.00.  Bob will eat fruits that cost between 1.00 and 5.00, as
# laid out in Credential 2.  Strictly speaking Bob and Mary's ruls apply to
# prices assigned by Ralphs.  Credentials 3-6 are Ralph's price assignments:
# 
# Fruit               Price      Credential
# apple               1.50       3
# kiwi                1.50       4
# black rsaberry      2.50       5
# navel ornage        0.50       6
#
# The attached ./run_query file proves that Mary will eat a naval orange and a kiwi,
# and that Bob will not eat a navel orange (too cheap).  It also proves a apple
# is priced at 1.50 and that it cannot prove that a green apple is priced at
# 1.50 (we don't know anything about green apples).

# fruits_rt2

# mary.what2eat<-?-navel orange  good
# mary.what2eat<-?-kiwi  good
# bob.what2eat<-?-navel orange  bad
# ralphs.fruitprice(1.50)<-?-apple   good
# ralphs.fruitprice(1.50)<-?-green apple   bad

creddy --generate --cn Mary
creddy --generate --cn Bob
creddy --generate --cn Ralphs

mary_keyid=`creddy --keyid --cert Mary_ID.pem`
bob_keyid=`creddy --keyid --cert Bob_ID.pem`
ralphs_keyid=`creddy --keyid --cert Ralphs_ID.pem`

fruitprice_qP="fruitprice([float:?P:[..2.00]])"
fruitprice_qP_2="fruitprice([float:?P:[1.00..5.00]])"

# [keyid:mary].oset:what2eat 
#      <- [keyid:ralphs].oset:fruitprice([float:?P:[..2.00]])
# Credential 1
creddy --attribute \
       --issuer Mary_ID.pem --key Mary_private.pem --oset "what2eat" \
       --subject-cert Ralphs_ID.pem --subject-oset "$fruitprice_qP" \
       --out mary_what2eat__ralphs_fruitprice_qP_attr.der

# [keyid:bob].oset:what2eat 
#      <- [keyid:ralphs].oset:fruitprice([float:?P:[1.00..5.00]])
# Credential 2
creddy --attribute \
       --issuer Bob_ID.pem --key Bob_private.pem --oset "what2eat" \
       --subject-cert Ralphs_ID.pem --subject-oset "$fruitprice_qP_2" \
       --out bob_what2eat__ralphs_fruitprice_qP_2_attr.der

# [keyid:ralphs].oset:fruitprice([float:1.50]) <- [string:'apple']
# Credential 3
creddy --attribute \
        --issuer Ralphs_ID.pem --key Ralphs_private.pem \
        --oset "fruitprice([float:1.50])" \
        --subject-obj "[string:'apple']" \
        --out Ralphs_fruitprice__apple_attr.der

# [keyid:ralphs].oset:fruitprice([float:1.50]) <- [string:'kiwi']
# Credential 4
creddy --attribute \
        --issuer Ralphs_ID.pem --key Ralphs_private.pem \
        --oset "fruitprice([float:1.50])" \
        --subject-obj "[string:'kiwi']" \
        --out Ralphs_fruitprice__kiwi_attr.der


# [keyid:ralphs].oset:fruitprice([float:2.50]) <- [string:'black rasberry']
# Credential 5
creddy --attribute \
        --issuer Ralphs_ID.pem --key Ralphs_private.pem \
        --oset "fruitprice([float:2.50])" \
        --subject-obj "[string:'black rasberry']" \
        --out Ralphs_fruitprice__black_rasberry_attr.der

# [keyid:ralphs].oset:fruitprice([float:0.50]) <- [string:'navel orange']
# Credential 6
creddy --attribute \
        --issuer Ralphs_ID.pem --key Ralphs_private.pem \
        --oset "fruitprice([float:0.50])" \
        --subject-obj "[string:'navel orange']" \
        --out Ralphs_fruitprice__navel_orange_attr.der

#####################################################################
# mary.what2eat <- ralphs.fruitsprice(?P:[..2.00])
# [keyid:mary].oset:what2eat 
#      <- [keyid:ralphs].oset:fruitprice([float:?P:[..2.00]])
#
# bob.what2eat <- ralphs.fruitsprice(?P:[1.00..5.00])
# [keyid:bob].oset:what2eat 
#      <- [keyid:ralphs].oset:fruitprice([float:?P:[1.00..5.00]])
# 
# ralphs.fruitprice(1.50)<-apple
# [keyid:ralphs].oset:fruitprice([float:1.50]) <- [string:'apple']
#
# ralphs.fruitprice(2.50)<-black rasberry
# [keyid:ralphs].oset:fruitprice([float:2.50]) <- [string:'black rasberry']
#
# ralphs.fruitprice(0.50)<-navel orange
# [keyid:ralphs].oset:fruitprice([float:0.50]) <- [string:'navel orange']
#