nvme\_init\_auth\_send(9) libnvme API manual nvme\_init\_auth\_send(9)

# [NAME](#NAME)

nvme\_init\_auth\_send - Initialize passthru command for Authentication Send

# [SYNOPSIS](#SYNOPSIS)

**void nvme\_init\_auth\_send** **(struct libnvme\_passthru\_cmd \*cmd ,** **\_\_u16 spsp ,** **\_\_u8 secp ,** **\_\_u32 tl ,** **void \*data ,** **\_\_u32 len );**

# [ARGUMENTS](#ARGUMENTS)

[cmd](#cmd)

Passthru command to use

[spsp](#spsp)

Security Protocol Specific field

[secp](#secp)

Security Protocol

[tl](#tl)

Protocol specific transfer length

[data](#data)

Authentication message payload buffer to send

[len](#len)

Data length of the payload in bytes

# [DESCRIPTION](#DESCRIPTION)

Initializes the passthru command buffer for the Fabrics Authentication Send command, used to send a KX-HMAC-CHAP authentication message (e.g. *struct nvmf\_auth\_kxchap\_reply*) to a controller. This is an NVMe-over-Fabrics specific command that reuses the SECP/SPSP0/SPSP1/TL field encoding of the Security Send command.

nvme\_init\_auth\_send October 2026

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Document: nvme_init_auth_send-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli