Re: Provider: cannot sign with ed25519-like key

[Matt Caswell <matt@xxxxxxxxxxx>]

On Thu, Aug 8, 2024 at 7:34 AM 'Bernd Ritter' via openssl-users <openssl-users@xxxxxxxxxxx> wrote:

 > error:030000A7:digital envelope routines::unknown max size

That error comes from here:

 https://github.com/openssl/openssl/blob/fd39d1c80cd5bd9cb5c64e3fc96102397e5e860f/crypto/evp/p_lib.c#L1811-L1827

So something is attempting to determine the size of a pkey and found it to be invalid.

This value should be returned by the keymgmt get_params function for the parameter OSSL_PKEY_PARAM_MAX_SIZE

See:

https://docs.openssl.org/master/man7/provider-keymgmt/#common-information-parameters

and

https://docs.openssl.org/master/man3/EVP_PKEY_get_size/#description

Matt

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