Hi, In cryptodev, there are some scenarios where in/out parameters are allocated on stack. One of few such cases is as follows:
During cryptodev_hash_init, the Mackey being passed to crypto_ahash_setkey is on stack and resides on stack in Crypto_create_session " uint8_t keyp[CRYPTO_HMAC_MAX_KEY_LEN]". This key may be used by driver for HMAC update/final processing. Is driver supposed to keep its copy of HMAC key because the stack copy of the key will be lost once we return from crypto_create_session? If an accelerate can generate an intermediate key like split-key from class-2 HMAC key, is driver supposed to Copy this key into a DMAable buffer for device to be able to read this key and do processing? Regards Yashpal _______________________________________________ Cryptodev-linux-devel mailing list Cryptodev-linux-devel@gna.org https://mail.gna.org/listinfo/cryptodev-linux-devel
