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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
uint64_t
ngx_quic_parse_int(u_char **pos)
{
u_char *p;
uint64_t value;
ngx_uint_t len;
p = *pos;
len = 1 << ((*p & 0xc0) >> 6);
value = *p++ & 0x3f;
while (--len) {
value = (value << 8) + *p++;
}
*pos = p;
return value;
}
void
ngx_quic_build_int(u_char **pos, uint64_t value)
{
u_char *p;
ngx_uint_t len;//, len2;
p = *pos;
len = 0;
while (value >> ((1 << len) * 8 - 2)) {
len++;
}
*p = len << 6;
// len2 =
len = (1 << len);
len--;
*p |= value >> (len * 8);
p++;
while (len) {
*p++ = value >> ((len-- - 1) * 8);
}
*pos = p;
// return len2;
}
uint64_t
ngx_quic_parse_pn(u_char **pos, ngx_int_t len, u_char *mask)
{
u_char *p;
uint64_t value;
p = *pos;
value = *p++ ^ *mask++;
while (--len) {
value = (value << 8) + (*p++ ^ *mask++);
}
*pos = p;
return value;
}
ngx_int_t
ngx_hkdf_extract(u_char *out_key, size_t *out_len, const EVP_MD *digest,
const u_char *secret, size_t secret_len, const u_char *salt,
size_t salt_len)
{
#ifdef OPENSSL_IS_BORINGSSL
if (HKDF_extract(out_key, out_len, digest, secret, secret_len, salt,
salt_len)
== 0)
{
return NGX_ERROR;
}
#else
EVP_PKEY_CTX *pctx;
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
if (EVP_PKEY_derive_init(pctx) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_set_hkdf_md(pctx, digest) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, secret_len) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, salt_len) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_derive(pctx, out_key, out_len) <= 0) {
return NGX_ERROR;
}
#endif
return NGX_OK;
}
ngx_int_t
ngx_hkdf_expand(u_char *out_key, size_t out_len, const EVP_MD *digest,
const u_char *prk, size_t prk_len, const u_char *info, size_t info_len)
{
#ifdef OPENSSL_IS_BORINGSSL
if (HKDF_expand(out_key, out_len, digest, prk, prk_len, info, info_len)
== 0)
{
return NGX_ERROR;
}
#else
EVP_PKEY_CTX *pctx;
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
if (EVP_PKEY_derive_init(pctx) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_set_hkdf_md(pctx, digest) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_set1_hkdf_key(pctx, prk, prk_len) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_CTX_add1_hkdf_info(pctx, info, info_len) <= 0) {
return NGX_ERROR;
}
if (EVP_PKEY_derive(pctx, out_key, &out_len) <= 0) {
return NGX_ERROR;
}
#endif
return NGX_OK;
}
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