Re: [PATCH v5 5/5] keys: asymmetric: ASYMMETRIC_TPM2_KEY_RSA_SUBTYPE

[Jarkko Sakkinen]

On Fri May 24, 2024 at 12:25 AM EEST, Jarkko Sakkinen wrote:
> +	/*
> +	 * ABI requires this according include/crypto/akcipher.h, which says
> +	 * that there is epilogue with algorithm OID and parameters length.
> +	 * Neither size nor semantics is documented *anywhere*, and there's no
> +	 * struct to hold them.
> +	 *
> +	 * So zeroing out the last eight bytes after the key blob seems like the
> +	 * best bet, given no better (or any) information. The size of the
> +	 * parameters (two u32's) was found from crypto/asymmetric/public_key.c.
> +	 */
> +	memset(work, 0, 8);

This is a mystery (or nightmare).

BR, Jarkko