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implemented one-time hmac context initialization

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Roman Arutyunyan
2012-05-22 22:37:18 +04:00
parent cfab13d47d
commit 30924a47ae
1 changed files with 7 additions and 3 deletions
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10
ngx_rtmp_handshake.c
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@ -101,10 +101,15 @@ static ngx_int_t
ngx_rtmp_make_digest(ngx_str_t *key, ngx_buf_t *src, ngx_rtmp_make_digest(ngx_str_t *key, ngx_buf_t *src,
u_char *skip, u_char *dst, ngx_log_t *log) u_char *skip, u_char *dst, ngx_log_t *log)
{ {
HMAC_CTX hmac; static HMAC_CTX hmac;
static unsigned hmac_initialized;
unsigned int len; unsigned int len;
HMAC_CTX_init(&hmac); if (!hmac_initialized) {
HMAC_CTX_init(&hmac);
hmac_initialized = 1;
}
HMAC_Init_ex(&hmac, key->data, key->len, EVP_sha256(), NULL); HMAC_Init_ex(&hmac, key->data, key->len, EVP_sha256(), NULL);
if (skip && src->pos <= skip && skip <= src->last) { if (skip && src->pos <= skip && skip <= src->last) {
@ -120,7 +125,6 @@ ngx_rtmp_make_digest(ngx_str_t *key, ngx_buf_t *src,
} }
HMAC_Final(&hmac, dst, &len); HMAC_Final(&hmac, dst, &len);
HMAC_CTX_cleanup(&hmac);
return NGX_OK; return NGX_OK;
} }