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#include "writeall.h"
#include "log.h"
#include "tls.h"
/* sendapp */
unsigned char *tls_engine_sendapp_buf(struct tls_context *ctx, size_t *len) {
if (ctx->flagdelayedenc) {
if (ctx->childclosed) return 0;
*len = sizeof ctx->tonetbuf - ctx->tonetbuflen;
if (!*len) return 0;
return ctx->tonetbuf + ctx->tonetbuflen;
}
return br_ssl_engine_sendapp_buf(&ctx->cc.eng, len);
}
void tls_engine_sendapp_ack(struct tls_context *ctx, size_t len) {
if (ctx->flagdelayedenc) {
ctx->tonetbuflen += len;
return;
}
br_ssl_engine_sendapp_ack(&ctx->cc.eng, len);
}
/* recvapp */
unsigned char *tls_engine_recvapp_buf(struct tls_context *ctx, size_t *len) {
if (ctx->flagdelayedenc) {
if (ctx->childclosed) return 0;
*len = ctx->tochildbuflen;
if (!*len) return 0;
return ctx->tochildbuf;
}
return br_ssl_engine_recvapp_buf(&ctx->cc.eng, len);
}
void tls_engine_recvapp_ack(struct tls_context *ctx, size_t len) {
if (ctx->flagdelayedenc) {
memmove(ctx->tochildbuf, ctx->tochildbuf + len,
ctx->tochildbuflen - len);
ctx->tochildbuflen -= len;
return;
}
br_ssl_engine_recvapp_ack(&ctx->cc.eng, len);
}
/* sendrec */
unsigned char *tls_engine_sendrec_buf(struct tls_context *ctx, size_t *len) {
if (ctx->flagdelayedenc) {
if (ctx->netclosed) return 0;
*len = ctx->tonetbuflen;
if (!*len) return 0;
return ctx->tonetbuf;
}
return br_ssl_engine_sendrec_buf(&ctx->cc.eng, len);
}
void tls_engine_sendrec_ack(struct tls_context *ctx, size_t len) {
if (ctx->flagdelayedenc) {
memmove(ctx->tonetbuf, ctx->tonetbuf + len, ctx->tonetbuflen - len);
ctx->tonetbuflen -= len;
return;
}
br_ssl_engine_sendrec_ack(&ctx->cc.eng, len);
}
/* recvrec */
unsigned char *tls_engine_recvrec_buf(struct tls_context *ctx, size_t *len) {
if (ctx->flagdelayedenc) {
if (ctx->netclosed) return 0;
*len = sizeof ctx->tochildbuf - ctx->tochildbuflen;
if (!*len) return 0;
return ctx->tochildbuf + ctx->tochildbuflen;
}
return br_ssl_engine_recvrec_buf(&ctx->cc.eng, len);
}
void tls_engine_recvrec_ack(struct tls_context *ctx, size_t len) {
if (ctx->flagdelayedenc) {
ctx->tochildbuflen += len;
return;
}
br_ssl_engine_recvrec_ack(&ctx->cc.eng, len);
}
/* sendapp5 */
unsigned char *tls_engine_sendapp5_buf(struct tls_context *ctx, size_t *len) {
if (ctx->flagdelayedenc) {
if (ctx->childclosed) return 0;
*len = sizeof ctx->tonet5buf - ctx->tonet5buflen;
if (!*len) return 0;
return ctx->tonet5buf + ctx->tonet5buflen;
}
return 0;
}
void tls_engine_sendapp5_ack(struct tls_context *ctx, size_t len) {
if (ctx->flagdelayedenc) {
ctx->tonet5buflen += len;
return;
}
return;
}
void tls_engine_flush(struct tls_context *ctx, int force) {
if (ctx->flagdelayedenc) return;
br_ssl_engine_flush(&ctx->cc.eng, force);
}
void tls_engine_close(struct tls_context *ctx) {
if (ctx->flagdelayedenc) {
ctx->childclosed = 1;
return;
}
br_ssl_engine_close(&ctx->cc.eng);
}
int tls_engine_handshakedone(struct tls_context *ctx) {
if (!ctx->flagdelayedenc && !ctx->flaghandshakedone) {
unsigned int st = tls_engine_current_state(ctx);
if (st & BR_SSL_SENDAPP) {
ctx->flaghandshakedone = 1;
return 1;
}
}
return 0;
}
unsigned int tls_engine_current_state(struct tls_context *ctx) {
unsigned int st = 0;
size_t len;
if (ctx->flagdelayedenc) {
if (ctx->childclosed && !tls_engine_sendrec_buf(ctx, &len)) {
st |= BR_SSL_CLOSED;
log_d1("TCP closed normally, child closed the connection");
}
if (ctx->netclosed && !tls_engine_recvapp_buf(ctx, &len)) {
st |= BR_SSL_CLOSED;
log_d1("TCP closed normally, remote closed the connection");
}
if (tls_engine_sendrec_buf(ctx, &len) != 0) st |= BR_SSL_SENDREC;
if (tls_engine_recvrec_buf(ctx, &len) != 0) st |= BR_SSL_RECVREC;
if (tls_engine_sendapp_buf(ctx, &len) != 0) st |= BR_SSL_SENDAPP;
if (tls_engine_recvapp_buf(ctx, &len) != 0) st |= BR_SSL_RECVAPP;
goto ret;
}
else {
st = br_ssl_engine_current_state(&ctx->cc.eng);
}
if (st & BR_SSL_CLOSED) {
int err;
err = br_ssl_engine_last_error(&ctx->cc.eng);
if (err == BR_ERR_OK) { log_d1("SSL closed normally"); }
else {
if (err >= BR_ERR_SEND_FATAL_ALERT) {
err -= BR_ERR_SEND_FATAL_ALERT;
if (ctx->flaghandshakedone) {
log_e2("SSL closed abnormally, sent alert: ",
tls_error_str(err));
}
else {
log_d2("SSL closed abnormally, sent alert: ",
tls_error_str(err));
}
}
else if (err >= BR_ERR_RECV_FATAL_ALERT) {
err -= BR_ERR_RECV_FATAL_ALERT;
if (ctx->flaghandshakedone) {
log_e2("SSL closed abnormally, received alert: ",
tls_error_str(err));
}
else {
log_d2("SSL closed abnormally, received alert: ",
tls_error_str(err));
}
}
else {
if (ctx->flaghandshakedone) {
log_e2("SSL closed abnormally: ", tls_error_str(err));
}
else {
log_d2("SSL closed abnormally: ", tls_error_str(err));
}
}
}
}
ret:
log_t2("br_ssl_engine_current_state(&ctx->cc.eng) = ", lognum(st));
return st;
}
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