spdk: use pb.EncryptionType instead of hard-coded

[glimchb]

Fixes #123

Signed-off-by: Boris Glimcher [email protected]

[codecov]

Codecov Report

Merging #144 (6b87e8c) into main (65d75cb) will decrease coverage by 0.41%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##             main     #144      +/-   ##
==========================================
- Coverage   49.67%   49.27%   -0.41%     
==========================================
  Files           4        4              
  Lines        1226     1236      +10     
==========================================
  Hits          609      609              
- Misses        599      608       +9     
- Partials       18       19       +1     

Impacted Files	Coverage Δ
pkg/server/middleend.go	62.75% <14.28%> (-3.38%)	⬇️

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[glimchb]

fails on

opi-spdk-server_1  | 2023/02/09 21:44:17 Sending to SPDK: {"jsonrpc":"2.0","id":53,"method":"accel_crypto_key_create","params":{"cipher":"AES_XTS_128","key":"0123456789abcdef0123456789abcdef","key2":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","name":"super_key"}}
opi-spdk-server_1  | 2023/02/09 21:44:17 Received from SPDK: {"id":53,"error":{"code":-32602,"message":"failed to create DEK, rc -22"},"result":false}
opi-spdk-server_1  | 2023/02/09 21:44:17 error: accel_crypto_key_create: json response error: failed to create DEK, rc -22

due to

spdk_1             | [2023-02-09 21:44:17.857110] accel_sw.c: 750:sw_accel_crypto_key_init: *ERROR*: Only AES_XTS cipher is supported

note AES_XTS_128 vs AES_XTS