OSSL_ASYM_CIPHER_PARAM_DIGEST
p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_DIGEST);
OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0),
OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0),
gparams[0] = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST,
sparams[0] = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST,