On Wed May 29, 2024 at 2:15 AM EEST, Stefan Berger wrote:
> > + ptr[TPM2_KEY_ECDSA_SIG_R_TAG] = 0x02; /* INTEGER */
> > + ptr[TPM2_KEY_ECDSA_SIG_R_SIZE] = SHA256_DIGEST_SIZE + r_0;
>
> The size of the signature has nothing to do with the size of the hash.
> SHA256_DIGEST_SIZE (32) happens to m
On 5/28/24 17:08, Jarkko Sakkinen wrote:
* Asymmetric TPM2 ECDSA key with signing and verification.
* Enabled with CONFIG_ASYMMETRIC_TPM2_KEY_ECDSA_SUBTYPE.
Cc: Stefan Berger
Signed-off-by: Jarkko Sakkinen
---
v7:
* Rewrote the signature encoder.
* Added the missing sha256() call to the sig
On Wed May 29, 2024 at 12:42 AM EEST, Jarkko Sakkinen wrote:
> On Wed May 29, 2024 at 12:08 AM EEST, Jarkko Sakkinen wrote:
> > + /* Encode the ASN.1 signature: */
> > +#define TPM2_KEY_ECDSA_SIG_SIZE(2 + 2 * (2 +
> > SHA256_DIGEST_SIZE) + r_0 + s_0)
> > + pr_info("sig_size=%d\n",
On Wed May 29, 2024 at 12:08 AM EEST, Jarkko Sakkinen wrote:
> + /* Encode the ASN.1 signature: */
> +#define TPM2_KEY_ECDSA_SIG_SIZE (2 + 2 * (2 +
> SHA256_DIGEST_SIZE) + r_0 + s_0)
> + pr_info("sig_size=%d\n", TPM2_KEY_ECDSA_SIG_SIZE);
> + ptr[0] = 0x30; /* SEQUENCE */
>
