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ngtcp2: use common key log routine for better thread-safety

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Tested with ngtcp2 built against the OpenSSL library. Additionally
tested with MultiSSL (NSS for TLS and ngtcp2+OpenSSL for QUIC).

The TLS backend (independent of QUIC) may or may not already have opened
the keylog file before. Therefore Curl_tls_keylog_open is always called
to ensure the file is open.
This commit is contained in:
Peter Wu 2020-05-04 01:41:46 +02:00
parent 7be7c56be9
commit 697f984ec9
1 changed files with 12 additions and 42 deletions
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50
lib/vquic/ngtcp2.c
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@ -40,6 +40,7 @@
#include "strerror.h"
#include "dynbuf.h"
#include "vquic.h"
#include "vtls/keylog.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
@ -186,14 +187,11 @@ static void quic_settings(struct quicsocket *qs,
}
}
static FILE *keylog_file; /* not thread-safe */
#ifdef USE_OPENSSL
static void keylog_callback(const SSL *ssl, const char *line)
{
(void)ssl;
fputs(line, keylog_file);
fputc('\n', keylog_file);
fflush(keylog_file);
Curl_tls_keylog_write_line(line);
}
#elif defined(USE_GNUTLS)
static int keylog_callback(gnutls_session_t session, const char *label,
@ -201,36 +199,14 @@ static int keylog_callback(gnutls_session_t session, const char *label,
{
gnutls_datum_t crandom;
gnutls_datum_t srandom;
gnutls_datum_t crandom_hex = { NULL, 0 };
gnutls_datum_t secret_hex = { NULL, 0 };
int rc = 0;
gnutls_session_get_random(session, &crandom, &srandom);
if(crandom.size != 32) {
return -1;
}
rc = gnutls_hex_encode2(&crandom, &crandom_hex);
if(rc < 0) {
fprintf(stderr, "gnutls_hex_encode2 failed: %s\n",
gnutls_strerror(rc));
goto out;
}
rc = gnutls_hex_encode2(secret, &secret_hex);
if(rc < 0) {
fprintf(stderr, "gnutls_hex_encode2 failed: %s\n",
gnutls_strerror(rc));
goto out;
}
fprintf(keylog_file, "%s %s %s\n", label, crandom_hex.data, secret_hex.data);
fflush(keylog_file);
out:
gnutls_free(crandom_hex.data);
gnutls_free(secret_hex.data);
return rc;
Curl_tls_keylog_write(label, crandom.data, secret->data, secret->size);
return 0;
}
#endif
@ -327,7 +303,6 @@ static SSL_QUIC_METHOD quic_method = {quic_set_encryption_secrets,
static SSL_CTX *quic_ssl_ctx(struct Curl_easy *data)
{
SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_method());
const char *keylog_filename;
SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_3_VERSION);
SSL_CTX_set_max_proto_version(ssl_ctx, TLS1_3_VERSION);
@ -348,13 +323,11 @@ static SSL_CTX *quic_ssl_ctx(struct Curl_easy *data)
SSL_CTX_set_quic_method(ssl_ctx, &quic_method);
keylog_filename = getenv("SSLKEYLOGFILE");
if(keylog_filename) {
keylog_file = fopen(keylog_filename, "wb");
if(keylog_file) {
/* Open the file if a TLS or QUIC backend has not done this before. */
Curl_tls_keylog_open();
if(Curl_tls_keylog_enabled()) {
SSL_CTX_set_keylog_callback(ssl_ctx, keylog_callback);
}
}
return ssl_ctx;
}
@ -496,7 +469,6 @@ static int quic_init_ssl(struct quicsocket *qs)
gnutls_datum_t alpn = {NULL, 0};
/* this will need some attention when HTTPS proxy over QUIC get fixed */
const char * const hostname = qs->conn->host.name;
const char *keylog_filename;
int rc;
if(qs->ssl)
@ -529,13 +501,11 @@ static int quic_init_ssl(struct quicsocket *qs)
return 1;
}
keylog_filename = getenv("SSLKEYLOGFILE");
if(keylog_filename) {
keylog_file = fopen(keylog_filename, "wb");
if(keylog_file) {
/* Open the file if a TLS or QUIC backend has not done this before. */
Curl_tls_keylog_open();
if(Curl_tls_keylog_enabled()) {
gnutls_session_set_keylog_function(qs->ssl, keylog_callback);
}
}
if(qs->cred)
gnutls_certificate_free_credentials(qs->cred);