1*e7b1675dSTing-Kang Chang# Java MAC example 2*e7b1675dSTing-Kang Chang 3*e7b1675dSTing-Kang ChangThis example shows how to check the integrity of data with Tink using Message 4*e7b1675dSTing-Kang ChangAuthentication Code (MAC). 5*e7b1675dSTing-Kang Chang 6*e7b1675dSTing-Kang ChangIt demonstrates the basic steps of using Tink, namely loading key material, 7*e7b1675dSTing-Kang Changobtaining a primitive, and using the primitive to do crypto. 8*e7b1675dSTing-Kang Chang 9*e7b1675dSTing-Kang ChangThe key material was generated with: 10*e7b1675dSTing-Kang Chang 11*e7b1675dSTing-Kang Chang```shell 12*e7b1675dSTing-Kang Changtinkey create-keyset --key-template HMAC_SHA256_256BITTAG --out-format JSON \ 13*e7b1675dSTing-Kang Chang --out mac_test_keyset.json 14*e7b1675dSTing-Kang Chang``` 15*e7b1675dSTing-Kang Chang 16*e7b1675dSTing-Kang Chang## Build and run 17*e7b1675dSTing-Kang Chang 18*e7b1675dSTing-Kang Chang### Bazel 19*e7b1675dSTing-Kang Chang 20*e7b1675dSTing-Kang Chang```shell 21*e7b1675dSTing-Kang Changgit clone https://github.com/google/tink 22*e7b1675dSTing-Kang Changcd tink/examples/java_src 23*e7b1675dSTing-Kang Changbazel build ... 24*e7b1675dSTing-Kang Chang 25*e7b1675dSTing-Kang Changecho "some data" > data.txt 26*e7b1675dSTing-Kang Changtouch mac_file.txt 27*e7b1675dSTing-Kang Chang 28*e7b1675dSTing-Kang Chang./bazel-bin/mac/mac_example compute \ 29*e7b1675dSTing-Kang Chang ./mac/mac_test_keyset.json data.txt mac_file.txt 30*e7b1675dSTing-Kang Chang 31*e7b1675dSTing-Kang Chang./bazel-bin/mac/mac_example verify \ 32*e7b1675dSTing-Kang Chang ./mac/mac_test_keyset.json data.txt mac_file.txt 33*e7b1675dSTing-Kang Chang``` 34