SOL_API struct sol_message_digest *
sol_message_digest_new(const struct sol_message_digest_config *config)
{
const struct sol_message_digest_info *dinfo;
struct sol_message_digest *handle;
struct sol_message_digest_common_new_params params;
struct sol_str_slice algorithm;
errno = EINVAL;
SOL_NULL_CHECK(config, NULL);
SOL_NULL_CHECK(config->on_digest_ready, NULL);
SOL_NULL_CHECK(config->algorithm, NULL);
#ifndef SOL_NO_API_VERSION
if (config->api_version != SOL_MESSAGE_DIGEST_CONFIG_API_VERSION) {
SOL_WRN("sol_message_digest_config->api_version=%" PRIu16 ", "
"expected version is %" PRIu16 ".",
config->api_version, SOL_MESSAGE_DIGEST_CONFIG_API_VERSION);
return NULL;
}
#endif
algorithm = sol_str_slice_from_str(config->algorithm);
if (!sol_str_table_ptr_lookup(_available_digests, algorithm, &dinfo)) {
SOL_WRN("failed to get digest algorithm \"%s\".",
config->algorithm);
return NULL;
}
params.config = config;
params.ops = &dinfo->ops;
params.context_size = dinfo->context_size;
params.digest_size = dinfo->digest_size;
params.context_template = NULL;
handle = sol_message_digest_common_new(params);
SOL_NULL_CHECK(handle, NULL);
dinfo->init(handle);
return handle;
}
SOL_API struct sol_message_digest *
sol_message_digest_new(const struct sol_message_digest_config *config)
{
int (*init_fn)(struct sol_message_digest *, const EVP_MD *, const struct sol_str_slice);
struct sol_message_digest_common_new_params params;
const EVP_MD *md;
struct sol_message_digest *handle;
int errno_bkp;
errno = EINVAL;
SOL_NULL_CHECK(config, NULL);
SOL_NULL_CHECK(config->on_digest_ready, NULL);
SOL_NULL_CHECK(config->algorithm, NULL);
#ifndef SOL_NO_API_VERSION
if (config->api_version != SOL_MESSAGE_DIGEST_CONFIG_API_VERSION) {
SOL_WRN("sol_message_digest_config->api_version=%" PRIu16 ", "
"expected version is %" PRIu16 ".",
config->api_version, SOL_MESSAGE_DIGEST_CONFIG_API_VERSION);
return NULL;
}
#endif
if (!did_openssl_load_digests) {
OpenSSL_add_all_digests();
did_openssl_load_digests = true;
}
params.config = config;
params.ops = NULL;
md = EVP_get_digestbyname(config->algorithm);
if (md) {
params.context_handle = EVP_MD_CTX_new();
params.context_free = (void (*)(void *))EVP_MD_CTX_free;
init_fn = _sol_message_digest_evp_init;
params.ops = &_sol_message_digest_evp_ops;
SOL_DBG("using evp, md=%p, algorithm=\"%s\"", md, config->algorithm);
} else if (streqn(config->algorithm, "hmac(", strlen("hmac("))) {
const char *p = config->algorithm + strlen("hmac(");
size_t len = strlen(p);
params.context_handle = HMAC_CTX_new();
params.context_free = (void (*)(void *))HMAC_CTX_free;
if (len > 1 && p[len - 1] == ')') {
char *mdname = strndupa(p, len - 1);
md = EVP_get_digestbyname(mdname);
if (!md) {
SOL_WRN("failed to get digest algorithm \"%s\" for \"%s\".",
mdname, config->algorithm);
return NULL;
}
init_fn = _sol_message_digest_hmac_init;
params.ops = &_sol_message_digest_hmac_ops;
SOL_DBG("using hmac, md=%p, algorithm=\"%s\"", md, mdname);
}
}
if (!params.ops) {
SOL_WRN("failed to get digest algorithm \"%s\".", config->algorithm);
return NULL;
}
params.digest_size = EVP_MD_size(md);
handle = sol_message_digest_common_new(params);
SOL_NULL_CHECK(handle, NULL);
errno = init_fn(handle, md, config->key);
if (errno)
goto error;
return handle;
error:
errno_bkp = errno;
sol_message_digest_del(handle);
errno = errno_bkp;
return NULL;
}