Luke Howard a88d00660e Fix PKCS#11 hcrypto backend regression (#314, #315, #316, #317) ...

81c778e broke the PKCS#11 hcrypto backend broke for many cases as it did
not support cipherstate resetting. (Prior to 81c778e, which was to fix #194,
the PKCS#11 backend did not support cipherstate chaining across invocations.)

hcrypto backends that maintain cipherstate independently of the hcrypto
context IV field need to set EVP_CIPH_ALWAYS_CALL_INIT to avoid the two
diverging. Their init function should support resetting the cipherstate
independently of key scheduling.

2018-05-11 13:11:31 +10:00

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