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2019-07-24 17:17:14 +01:00 · 2019-07-24 17:17:14 +01:00 · e4e305c83e
--- a/bssl_perf/Makefile
+++ b/bssl_perf/Makefile
@ -0,0 +1,38 @@
+BORINGSSL_DIR=/home/hdc/repos/cloudflare/boringssl
+BORINGSSL_LIB=$(BORINGSSL_DIR)/build.64bitRel/
+
+CC 		= clang
+SRCDIR 	= src
+OBJDIR 	= obj
+DBG    ?= 1
+
+ifeq ($(DBG),1)
+DEBUG = -DDEBUG -g -O0
+else
+DEBUG = -O3
+endif
+
+CFLAGS = -std=c99
+CFLAGS+= $(DEBUG)
+CFLAGS+= -I$(BORINGSSL_DIR)/ -I$(BORINGSSL_DIR)/include
+
+LDFLAGS = -L$(BORINGSSL_LIB)/crypto -L$(BORINGSSL_LIB)/ssl
+LDFLAGS+= -lssl -lcrypto -lpthread
+
+all: server client
+
+clean:
+	rm -rf $(OBJDIR)
+	rm -rf client server
+
+client: common
+	$(CC) -c $(SRCDIR)/client.c -o $(OBJDIR)/client.o $(CFLAGS)
+	$(CC) -o client $(OBJDIR)/client.o $(OBJDIR)/common.o $(LDFLAGS)
+
+server: common
+	$(CC) -c $(SRCDIR)/server.c -o $(OBJDIR)/server.o $(CFLAGS)
+	$(CC) -o server $(OBJDIR)/server.o $(OBJDIR)/common.o  $(LDFLAGS)
+
+common:
+	mkdir -p $(OBJDIR)
+	$(CC) -c $(SRCDIR)/common.c -o $(OBJDIR)/common.o $(CFLAGS)
--- a/bssl_perf/etc/ca/ca.cert.pem
+++ b/bssl_perf/etc/ca/ca.cert.pem
@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
+MIID8jCCAtqgAwIBAgIJALuIdyUDX1d+MA0GCSqGSIb3DQEBCwUAMIGFMQswCQYD
+VQQGEwJGUjENMAsGA1UECAwEUEFDQTEXMBUGA1UEBwwOQ2FnbmVzIHN1ciBNZXIx
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+gBKsJxp0aVI5pB9mLqnluB21c4sVqt6si8sWcJjtTCmojp192aSxB3A6hVI0P8qY
+7iJBFwa1
+-----END CERTIFICATE-----
--- a/bssl_perf/etc/ecdsa_256.key
+++ b/bssl_perf/etc/ecdsa_256.key
@ -0,0 +1,8 @@
+-----BEGIN EC PARAMETERS-----
+BggqhkjOPQMBBw==
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIF8KXjVrcF0u+J3dDxrOPHr3/xQlxwpZowwdDxiM72iUoAoGCCqGSM49
+AwEHoUQDQgAE7HJPLOV22gIiLMIR1btCTDQMbtwwWqhuErrk2r4+p3Oino2fSDBm
+9T76CNfnLjmUue1qoLj144aK86GB0rGy4A==
+-----END EC PRIVATE KEY-----
--- a/bssl_perf/etc/ecdsa_256.pem
+++ b/bssl_perf/etc/ecdsa_256.pem
@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----
+MIICTTCCATUCCQD7FNAespFtBDANBgkqhkiG9w0BAQsFADCBhTELMAkGA1UEBhMC
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+2O99VHKVMmEzsFOyE+4khVM=
+-----END CERTIFICATE-----
--- a/bssl_perf/etc/random_data
+++ b/bssl_perf/etc/random_data
--- a/bssl_perf/etc/rsa_2048.key
+++ b/bssl_perf/etc/rsa_2048.key
@ -0,0 +1,30 @@
+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: AES-256-CBC,298AA9B5B7606E863BB9183F689D9346
+
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+/8z6lNYPlMGgBwdCD6NBXpXHkp7rxOAGvHx5eUocjgXfF2b8zSXyN/9egK9sfMZZ
+-----END RSA PRIVATE KEY-----
--- a/bssl_perf/etc/rsa_2048.pem
+++ b/bssl_perf/etc/rsa_2048.pem
@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDGDCCAgACCQD7FNAespFtAjANBgkqhkiG9w0BAQsFADCBhTELMAkGA1UEBhMC
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+-----END CERTIFICATE-----
--- a/bssl_perf/etc/rsa_3072.key
+++ b/bssl_perf/etc/rsa_3072.key
@ -0,0 +1,40 @@
+-----BEGIN PRIVATE KEY-----
+MIIG/QIBADANBgkqhkiG9w0BAQEFAASCBucwggbjAgEAAoIBgQDChoUsywwSGecu
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+u5evFUiLOWw7CJ9Sy1/Jaws=
+-----END PRIVATE KEY-----
--- a/bssl_perf/etc/rsa_3072.pem
+++ b/bssl_perf/etc/rsa_3072.pem
@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIIC1DCCAnsCCQCY04gkucQIkzAKBggqhkjOPQQDAjB9MQswCQYDVQQGEwJGUjEN
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+cRb2Q37V4VM=
+-----END CERTIFICATE-----
--- a/bssl_perf/src/client.c
+++ b/bssl_perf/src/client.c
@ -0,0 +1,212 @@
+#include <unistd.h>
+#include "common.h"
+
+// include/ path is here for a reason - to make sure we compile against boringssl (temporary solution)
+#include <include/openssl/ssl.h>
+#include <pthread.h>
+
+// Buffer used for read/write tests
+unsigned char rw_buf[BUFFER_SIZE];
+static const int Curves[1] = {NID_X25519};
+static const uint16_t TLS_PROT_VERSION = TLS1_3_VERSION;
+
+SSL_CTX *setup_client_ctx(void)
+{
+    SSL_CTX* ctx = NULL;
+
+    ctx = SSL_CTX_new(TLS_method());
+    assert(ctx != NULL);
+    SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
+    if( SSL_CTX_load_verify_locations(ctx, CACERT, NULL) != 1) {
+        ERR("Error loading CA DIR");
+    }
+
+    if (SSL_CTX_set1_curves(ctx, Curves, 1) != 1) {
+        ERR("Can't set SIDH group");
+    }
+
+    if (SSL_CTX_set_min_proto_version(ctx, TLS_PROT_VERSION) != 1 ||
+        SSL_CTX_set_max_proto_version(ctx, TLS_PROT_VERSION) != 1) {
+        ERR("Enforcing protocol to TLSv1.2");
+    }
+
+    return ctx;
+}
+
+int do_client_loop(SSL* ssl)
+{
+    int err, nwritten;
+    char buf[80];
+
+    for(;;)
+    {
+        if( !fgets(buf, sizeof(buf), stdin) )
+            break;
+        for(nwritten = 0; nwritten < strlen(buf); nwritten += err)
+        {
+            err = SSL_write(ssl, buf + nwritten, strlen(buf) - nwritten);
+            if(err<=0)
+                return 0;
+        }
+    }
+    return 1;
+}
+
+void test_Handshake(size_t handshake_nb) {
+
+    SSL* ssl;
+    SSL_CTX* ctx;
+    int err;
+
+    init();
+    ctx = setup_client_ctx();
+
+    DBG("Trying to connect");
+    for (size_t i=0; i<handshake_nb; i++) {
+        int fd = connect_once();
+
+        DBG("SSL ctx setup");
+        if (!(ssl = SSL_new(ctx)))  {
+            ERR("Error creating an SSL context");
+        }
+        SSL_set_fd(ssl, fd);
+
+        DBG("SSL handshake");
+
+        // OZAPTF: do handshake thing
+        err = SSL_connect(ssl);
+        if (err<=0) {
+            ERR("Error connecting SSL err=%d", err);
+        }
+        assert(!SSL_session_reused(ssl));
+
+        SSL_free(ssl);
+        close(fd);
+    }
+    SSL_CTX_free(ctx);
+
+}
+
+void test_Read() {
+    int err, nread=0;
+    SSL* ssl;
+    SSL_CTX* ctx;
+
+    init();
+    ctx = setup_client_ctx();
+
+    DBG("Trying to connect");
+    int fd = connect_once();
+
+    DBG("SSL ctx setup");
+    if (!(ssl = SSL_new(ctx)))  {
+        ERR("Error creating an SSL context");
+    }
+    SSL_set_fd(ssl, fd);
+
+    DBG("SSL handshake");
+    err = SSL_connect(ssl);
+    if (err<=0) {
+        ERR("Error connecting SSL err=%d", err);
+    }
+
+    DBG("SSL writing");
+    if (SSL_write(ssl, (unsigned char*)READ_REQUEST, sizeof(READ_REQUEST) ) <= 0) {
+        ERR("SSL_write");
+    }
+
+    DBG("Continue reading");
+    do {
+#ifdef DEBUG
+        fwrite(rw_buf,1, nread, stdout);
+#endif
+        for(nread=0; nread<sizeof(rw_buf); nread+=err) {
+            err = SSL_read(ssl, rw_buf+nread, sizeof(rw_buf) - nread);
+            if(err <= 0) {
+                break;
+            }
+        }
+    } while(err>0);
+
+    if (0==(SSL_get_shutdown(ssl) & SSL_RECEIVED_SHUTDOWN)) {
+        ERR("SSL_Read");
+    }
+
+    DBG("Shutdown");
+    assert(SSL_shutdown(ssl) == 1);
+
+    SSL_free(ssl);
+    SSL_CTX_free(ctx);
+    close(fd);
+}
+
+void test_Write() {
+    SSL* ssl;
+    SSL_CTX* ctx;
+    int err,nread=0;
+
+    init();
+    ctx = setup_client_ctx();
+
+    DBG("Trying to connect");
+    int fd = connect_once();
+
+    DBG("SSL ctx setup");
+    if (!(ssl = SSL_new(ctx)))  {
+        ERR("Error creating an SSL context");
+    }
+    SSL_set_fd(ssl, fd);
+
+    DBG("SSL handshake");
+    err = SSL_connect(ssl);
+    if (err<=0) {
+        ERR("Error connecting SSL err=%d", err);
+    }
+
+    DBG("Writing");
+
+    fill_buffer_from_file(rw_buf, sizeof(rw_buf));
+    for (size_t i=0; i<RW_ITERATIONS; i++) {
+        for(nread=0; nread<sizeof(rw_buf); nread+=err) {
+            err = SSL_write(ssl, rw_buf+nread, sizeof(rw_buf) - nread);
+            if(err <= 0) {
+                ERR("SSL_write");
+            }
+        }
+    }
+
+    DBG("Shutdown");
+    assert(SSL_shutdown(ssl) == 0);
+    assert(SSL_shutdown(ssl) == 1);
+
+    SSL_free(ssl);
+    SSL_CTX_free(ctx);
+    close(fd);
+}
+
+int main(int argc, char* argv[]) {
+
+    if (argc < 2) {
+        goto usage;
+    }
+
+    if (!strncmp("test_Handshake", argv[1], strlen("test_Handshake"))) {
+        test_Handshake(HANDHAKE_REPS);
+    } else if (!strncmp("test_Read", argv[1], strlen("test_Read"))) {
+        test_Read();
+    } else if (!strncmp("test_Write", argv[1], strlen("test_Write"))) {
+        test_Write();
+    } else {
+        printf("Unknown test");
+        goto usage;
+    }
+
+exit:
+    cleanup();
+    return 0;
+
+usage:
+    ERR("\n\nUsage: %s <host>:<port> test_name\nOptions for 'test_name':\n\t"
+        "test_Handshake\n\ttest_Write\n\ttest_Read\n", argv[0]);
+    goto exit;
+}
--- a/bssl_perf/src/common.c
+++ b/bssl_perf/src/common.c
@ -0,0 +1,84 @@
+#include "common.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include <include/openssl/ssl.h>
+
+/* -----------------------------------------------------------------------------
+ * @brief   Performs TCP 3-way handshake with IP:PORT
+ * -------------------------------------------------------------------------------- */
+int connect_once(void) {
+
+    struct sockaddr_in a;
+
+    int fd = socket(AF_INET, SOCK_STREAM, 0);
+    memset(&a, 0, sizeof(a));
+    a.sin_family = AF_INET;
+    a.sin_addr.s_addr = inet_addr(IP);
+    a.sin_port = htons(PORT);
+
+    // Set socket to blocking, in order to make things simpler
+    if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_NONBLOCK )<0) {
+        ERR("fcntl");
+    }
+
+    if (connect(fd, (struct sockaddr *) &a, sizeof(a))<0) {
+        ERR("Econnect");
+    }
+    DBG("Connected");
+    return fd;
+}
+
+/* -----------------------------------------------------------------------------
+ * @brief   Fills the buffer with random data.
+ *------------------------------------------------------------------------------ */
+void fill_buffer_from_file(unsigned char *b, size_t sz) {
+    FILE * fd = fopen(RANDOM_DATA_FILE, "r");
+    if (!fd) {
+        ERR("fopen");
+    }
+
+    if (fread(b, 1, sz, fd) < sz) {
+        // Random data file smaller than a buffer
+        ERR("fread");
+    }
+
+    if (fclose(fd)) {
+        ERR("fclose");
+    }
+}
+
+/* -----------------------------------------------------------------------------
+ * @brief   Initializes BoringSSL structures
+ *------------------------------------------------------------------------------ */
+void init(void) {
+    OpenSSL_add_all_algorithms();
+    SSL_load_error_strings();
+    SSL_library_init();
+    CRYPTO_library_init();
+
+    if(!SSL_library_init())
+    {
+        fprintf(stderr, "** OpenSSL initialization failed!\n");
+        exit(-1);
+    }
+}
+
+/* -----------------------------------------------------------------------------
+ * @brief   Tears down what was initialized in init() above
+ *------------------------------------------------------------------------------ */
+void cleanup(void) {
+
+    ERR_free_strings();
+    ERR_clear_error();
+    CRYPTO_set_locking_callback(NULL);
+    CRYPTO_set_id_callback(NULL);
+    EVP_cleanup();
+    CRYPTO_cleanup_all_ex_data();
+}
--- a/bssl_perf/src/common.h
+++ b/bssl_perf/src/common.h
@ -0,0 +1,64 @@
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
+#define PORT                           1443
+#define IP                             "127.0.0.1"
+#define SERVER                         "localhost"
+#define CLIENT                         "localhost"
+#define CACERT                         "etc/ca/ca.cert.pem"
+//#define CERT_HOSTNAME                  "www.cert_testing.com"
+#define CERT_HOSTNAME                  "www.dmv.com"
+#define KEYFILE_PASS                   "test123"
+#define READ_REQUEST                   "ReadRequest"
+#define HANDHAKE_REPS                  200
+// Keep random data file must at least same size as a buffer size
+#define RANDOM_DATA_FILE               "etc/random_data"
+#define BUFFER_SIZE                    1024
+// Amount bytes of plaintext data exchanged in read-write stets is BUFFER_SIZE*RW_ITERATOIONS
+#ifdef DEBUG
+#define RW_ITERATIONS                  (1024*10) // 10 MB
+#else
+#define RW_ITERATIONS                  (1024*200) // 1GB
+#endif
+// Utils
+#define LOG_I(...)                                                              \
+    do {                                                                        \
+        (void) fprintf(stdout, "[%s() %s:%d] ", __func__, __FILE__, __LINE__);  \
+        (void) fprintf(stdout, __VA_ARGS__);                                    \
+        (void) fprintf(stdout, "\n");                                           \
+    } while (0)
+#define ERR(...)            \
+    do {                    \
+        LOG_I(__VA_ARGS__);   \
+        exit(-1);           \
+    } while (0)
+
+#define LOG(...) LOG_I(__VA_ARGS__)
+
+#ifdef DEBUG
+#define DBG(...) LOG_I(__VA_ARGS__)
+#else
+#define DBG(...)
+#endif
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+int connect_once(void);
+void init(void);
+void cleanup(void);
+void fill_buffer_from_file(unsigned char *b, size_t sz);
+
+// Available tests
+void test_Write(void);
+void test_Read(void);
+void test_Handshake(size_t);
+
+#endif // __COMMON_H__
--- a/bssl_perf/src/server.c
+++ b/bssl_perf/src/server.c
@ -0,0 +1,260 @@
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+// include/ path is here for a reason - to make sure we compile against boringssl (temporary solution)
+#include <include/openssl/rand.h>
+#include <include/openssl/ssl.h>
+#include <include/openssl/x509v3.h>
+#include <pthread.h>
+
+#include "common.h"
+
+// Enforce this protocol version
+#define TLS_PROT_VERSION    TLS1_3_VERSION
+static const int Curves[3] = {NID_CECPQ2, NID_CECPQ2b, NID_X25519};
+
+static const struct CertDesc_t {
+    const char* arg;
+    const char* cert;
+    const char* key;
+    const char* cipher;
+    const int* curves;
+} Certs[] = {
+    {
+        .arg = "RSA_2048",
+        .key = "etc/rsa_2048.key",
+        .cert = "etc/rsa_2048.pem",
+        .cipher = "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+        .curves = Curves,
+    },
+    {
+        .arg = "RSA_3072",
+        .key = "etc/rsa_3072.key",
+        .cert = "etc/rsa_3072.pem",
+        .cipher = "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+        .curves = Curves,
+    },
+    {
+        .arg = "ECDSA_256",
+        .key = "etc/ecdsa_256.key",
+        .cert = "etc/ecdsa_256.pem",
+        .cipher = "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
+        .curves = Curves,
+    }
+};
+
+const struct CertDesc_t* get_cert_desc(const char* c) {
+    for(size_t i=0; i<ARRAY_SIZE(Certs); i++) {
+        if (!memcmp(Certs[i].arg, c, strlen(Certs[i].arg))) {
+            return &Certs[i];
+        }
+    }
+    ERR("Critical error");
+}
+
+// Buffer used for read/write tests
+unsigned char rw_buf[BUFFER_SIZE];
+
+int pass_cb(char *buf, int size, int rwflag, void *u) {
+    DBG("Using password " KEYFILE_PASS);
+    // password for all keys is "test123"
+    memcpy(buf, KEYFILE_PASS, strlen(KEYFILE_PASS));
+    return strlen(KEYFILE_PASS);
+}
+
+static int accept_once(void) {
+
+	int fd, client;
+	int reuseval = 1;
+    struct sockaddr_in a;
+    size_t a_len = sizeof(a);
+
+    // configure
+    memset(&a, 0, a_len);
+    a.sin_family = AF_INET;
+    a.sin_port = htons(PORT);
+    a.sin_addr.s_addr = INADDR_ANY;
+
+	fd = socket(PF_INET, SOCK_STREAM, 0);
+
+    if (setsockopt(fd,SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
+    	ERR("setsockopt");
+    }
+
+    if (bind(fd, (struct sockaddr *)&a, sizeof(a))) {
+	    ERR("bind");
+    }
+
+    if (listen(fd, 1)) {
+        ERR("listen");
+    }
+
+
+    client = accept(fd, (struct sockaddr *)&a, (socklen_t *)&a_len);
+    if (client<0) {
+        ERR("accept");
+    }
+    return client;
+}
+
+static SSL_CTX* setup_server_ctx(const char* cert_name) {
+	SSL_CTX* ctx = SSL_CTX_new(TLS_method());
+    assert(ctx);
+
+    const struct CertDesc_t *c = get_cert_desc(cert_name);
+    SSL_CTX_set_default_passwd_cb(ctx, &pass_cb);
+
+	if(SSL_CTX_use_certificate_file(ctx, c->cert, SSL_FILETYPE_PEM) != 1)
+		ERR("Error loading certificate from file");
+	if(SSL_CTX_use_PrivateKey_file(ctx, c->key, SSL_FILETYPE_PEM) != 1)
+		ERR("Error loading private key from file");
+
+    if (SSL_CTX_set_strict_cipher_list(ctx, c->cipher) != 1) {
+        ERR("Error setting cipher list");
+    }
+
+    if (!SSL_CTX_set1_curves(ctx, c->curves, 1)) {
+        ERR("Enforcing curve");
+    }
+
+    if (SSL_CTX_set_min_proto_version(ctx, TLS_PROT_VERSION) != 1 ||
+        SSL_CTX_set_max_proto_version(ctx, TLS_PROT_VERSION) != 1) {
+        ERR("Enforcing protocol to TLSv1.2");
+
+    }
+    return ctx;
+}
+
+static void start_writing(SSL *ssl) {
+    int nread,err;
+
+    DBG("Start writing");
+
+    fill_buffer_from_file(rw_buf, sizeof(rw_buf));
+    for (size_t i=0; i<RW_ITERATIONS; i++) {
+        for(nread=0; nread<sizeof(rw_buf); nread+=err) {
+            err = SSL_write(ssl, rw_buf+nread, sizeof(rw_buf) - nread);
+            if(err <= 0) {
+                ERR("SSL_write");
+            }
+        }
+    }
+}
+
+static int do_server_loop(SSL* ssl) {
+    int nread,err;
+
+    DBG("Check if first packet is ReadRequest");
+    for(nread=0; nread<strlen(READ_REQUEST); nread+=err) {
+        err = SSL_read(ssl, rw_buf+nread, sizeof(rw_buf) - nread);
+        if (err <=0) {
+            break;
+        }
+    }
+
+    DBG("Check if server loop should be finished");
+    // Stop here if shutdown requested
+    if (SSL_get_shutdown(ssl) & SSL_RECEIVED_SHUTDOWN) {
+        return 1;
+    }
+
+    // Check if client wants to read
+    if (nread && !memcmp(READ_REQUEST, rw_buf, nread)) {
+        start_writing(ssl);
+        return 2; // server initiated closure
+    }
+
+    // Keep reading till connection closed
+    DBG("Continue reading");
+	do {
+		for(nread=0; nread<sizeof(rw_buf); nread+=err) {
+            err = SSL_read(ssl, rw_buf+nread, sizeof(rw_buf) - nread);
+			if(err <= 0) {
+				break;
+            }
+		}
+	} while(err>0);
+	return (SSL_get_shutdown(ssl) & SSL_RECEIVED_SHUTDOWN) ? 1 : 0;
+}
+
+#ifdef DEBUG
+static const char* DBG_get_curve(SSL* ssl) {
+    const int id = SSL_get_curve_id(ssl);
+    if (!id) return "N/A";
+    return SSL_get_curve_name(id);
+}
+#endif
+
+// Interface for accepting
+int main(int argc, char *argv[])
+{
+	SSL     *ssl;
+	SSL_CTX *ctx;
+	int 	fd, ret;
+
+    if (argc < 2) {
+        goto usage;
+    }
+
+    // Start server
+    init();
+
+    ctx = setup_server_ctx(argv[1]);
+	fd = accept_once();
+
+	for(;;) {
+
+		DBG("SSL Accepting");
+		if(!(ssl = SSL_new(ctx)))	{
+			DBG("Error creating SSL context");
+		}
+
+
+		SSL_set_fd(ssl, fd);
+        ret = SSL_accept(ssl);
+        //printf("%s\n", SSL_get_curve_name(SSL_get_curve_id(ssl)));
+		if (ret<=0)	{
+            ret = SSL_get_error(ssl, ret);
+
+            if (ret == SSL_ERROR_SYSCALL) {
+                DBG("Connection closed");
+                goto end;
+            } else {
+                ERR("Critical error occured %d", ret);
+            }
+		}
+
+        DBG("Protocol: %s Cipher %s Curve %s", SSL_get_version(ssl), SSL_get_cipher_name(ssl), DBG_get_curve(ssl));
+
+		DBG("server loop");
+        ret = do_server_loop(ssl);
+		if(ret) {
+
+			DBG("Shutdown");
+			SSL_set_read_ahead(ssl, 0);
+		    if (ret==2) {
+                // Server is closing
+                SSL_shutdown(ssl);
+            }
+            assert(SSL_shutdown(ssl)==1);
+		}
+		else {
+			DBG("Shutdown - error case");
+			goto end;
+		}
+        SSL_clear(ssl);
+	}
+    SSL_CTX_free(ctx);
+
+end:
+    cleanup();
+	return 0;
+usage:
+    ERR("\n\nUsage: %s server certificate \nOptions for 'server certificate':\n\t"
+        "RSA_2048\n\t"
+        "RSA_3072\n\t"
+        "ECDSA_256\n\t",
+        argv[0]);
+    goto end;
+}
--- a/rawhammer/Cargo.lock
+++ b/rawhammer/Cargo.lock
@ -0,0 +1,92 @@
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+"checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
+"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
--- a/rawhammer/Cargo.toml
+++ b/rawhammer/Cargo.toml
@ -0,0 +1,11 @@
+[package]
+name = "rawhammer"
+version = "0.1.0"
+authors = ["Kris Kwiatkowski <kris@cloudflare.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+ctrlc = "3.1.3"
+thread-control = "0.1.2"
--- a/rawhammer/README.md
+++ b/rawhammer/README.md
--- a/rawhammer/src/main.rs
+++ b/rawhammer/src/main.rs
@ -0,0 +1,284 @@
+use std::io::Write;
+use std::net::*;
+use std::env;
+use std::time::Duration;
+use std::sync::mpsc::sync_channel;
+use std::thread;
+use std::time;
+use ctrlc;
+use thread_control::*;
+
+static CH_X25519: &'static [u8] = b"\
+\x16\x03\x01\x00\xfc\x01\x00\x00\xf8\x03\x03\x84\x14\x34\x1d\x32\
+\x62\x53\x6c\x37\xb5\xdd\xe6\xd9\x58\x34\xd7\x3b\x36\xf0\xb8\x05\
+\xd1\xba\x5c\xa6\x47\x15\xae\xd6\x35\x54\x62\x20\x1f\x31\x5c\xc0\
+\x2a\xb3\x05\xb3\x7f\x36\x5d\xe5\xe1\x22\x36\xd3\xd7\x29\xf2\x87\
+\xe3\x3a\xbf\xac\x9f\x3b\xd6\x57\xd9\x54\xb5\x48\x00\x24\x13\x01\
+\x13\x02\x13\x03\xc0\x2b\xc0\x2f\xc0\x2c\xc0\x30\xcc\xa9\xcc\xa8\
+\xc0\x09\xc0\x13\xc0\x0a\xc0\x14\x00\x9c\x00\x9d\x00\x2f\x00\x35\
+\x00\x0a\x01\x00\x00\x8b\x00\x00\x00\x17\x00\x15\x00\x00\x12\x77\
+\x77\x77\x2e\x63\x6c\x6f\x75\x64\x66\x6c\x61\x72\x65\x2e\x63\x6f\
+\x6d\x00\x17\x00\x00\xff\x01\x00\x01\x00\x00\x0a\x00\x04\x00\x02\
+\x00\x1d\x00\x0b\x00\x02\x01\x00\x00\x23\x00\x00\x00\x0d\x00\x14\
+\x00\x12\x04\x03\x08\x04\x04\x01\x05\x03\x08\x05\x05\x01\x08\x06\
+\x06\x01\x02\x01\x00\x33\x00\x26\x00\x24\x00\x1d\x00\x20\x05\x4b\
+\x0a\x0a\xb2\xe6\x39\xb1\x25\x40\x88\x8a\x18\x5b\x02\x88\x7e\x0c\
+\x49\x5c\xfc\xc8\xd4\xcd\x9d\xab\x2c\x1d\x91\x23\xce\x42\x00\x2d\
+\x00\x02\x01\x01\x00\x2b\x00\x09\x08\x03\x04\x03\x03\x03\x02\x03\x01";
+
+static CH_P521: &'static [u8] = b"\
+\x16\x03\x01\x02\x00\x01\x00\x01\xfc\x03\x03\x1c\x35\x05\x88\x16\
+\x84\x48\xae\xc7\xaf\x40\xed\x64\xa4\x25\x73\xbb\xb9\xc0\x2c\x46\
+\x02\x2d\xc8\xa7\x18\x27\xca\x6e\x7a\xe9\x52\x20\x8f\x88\x3d\x7f\
+\xd0\xe5\x75\x4e\xa1\x94\x0b\x60\x26\xdf\xdd\xe1\x61\xff\x04\x67\
+\xd5\x47\x88\x83\x1f\x49\x2b\xdc\x08\xc2\x10\x82\x00\x24\x13\x01\
+\x13\x02\x13\x03\xc0\x2b\xc0\x2f\xc0\x2c\xc0\x30\xcc\xa9\xcc\xa8\
+\xc0\x09\xc0\x13\xc0\x0a\xc0\x14\x00\x9c\x00\x9d\x00\x2f\x00\x35\
+\x00\x0a\x01\x00\x01\x8f\x00\x00\x00\x17\x00\x15\x00\x00\x12\x77\
+\x77\x77\x2e\x63\x6c\x6f\x75\x64\x66\x6c\x61\x72\x65\x2e\x63\x6f\
+\x6d\x00\x17\x00\x00\xff\x01\x00\x01\x00\x00\x0a\x00\x04\x00\x02\
+\x00\x19\x00\x0b\x00\x02\x01\x00\x00\x23\x00\x00\x00\x0d\x00\x14\
+\x00\x12\x04\x03\x08\x04\x04\x01\x05\x03\x08\x05\x05\x01\x08\x06\
+\x06\x01\x02\x01\x00\x33\x00\x8b\x00\x89\x00\x19\x00\x85\x04\x01\
+\xf0\xe8\x81\xa5\x0b\x6d\x59\x6a\xaf\xfc\xe3\xf0\xfc\x09\x09\x12\
+\x2b\x00\x73\xd0\x06\xc5\x4f\x7e\xa1\xb2\x1c\x95\xe4\x2f\x7e\x96\
+\x45\x33\xf0\x1e\x40\x31\x9c\xe9\xbe\xc1\x21\x10\xd0\x90\xc8\xa5\
+\x0c\x08\xd1\x82\x05\xd9\x03\xcf\xfe\x57\xdc\x5e\xac\x80\x73\x09\
+\xf7\x01\xaf\xde\xff\xee\xd4\x49\x05\x5f\xa4\xae\xbb\x16\x40\x36\
+\x43\x24\xa6\x2a\x79\xd6\x1e\xa4\xe5\xd1\xf9\x89\xf8\x04\x1a\xf1\
+\x42\x7a\xc9\x21\x27\xbc\x04\x7f\x3c\x90\x88\xab\x0c\x2d\xf8\xc8\
+\xb4\x3b\x93\x63\x44\xe8\x49\xc0\xec\x46\xa3\x17\x4c\xa0\x8f\x82\
+\x9d\x24\x94\x00\x2d\x00\x02\x01\x01\x00\x2b\x00\x09\x08\x03\x04\
+\x03\x03\x03\x02\x03\x01\x00\x15\x00\x9b\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00";
+
+static CH_SIKE: &'static [u8] = b"\
+\x16\x03\x01\x02\x46\x01\x00\x02\x42\x03\x03\xf6\x5d\xac\x6f\x1d\
+\x7c\x4e\x8d\x33\x29\xc2\xc9\xf7\xde\x80\xe1\xd6\x75\xda\x34\x1f\
+\x48\xbe\xec\x81\xed\x61\x99\x0b\x14\x0b\x7a\x20\xa6\xe1\x5c\xde\
+\x61\xb5\x70\x01\x9a\x8c\x2e\xab\xb2\x52\x66\x53\xa7\x6b\xad\x5c\
+\x6e\xc0\x0d\x1b\xba\x37\x4b\x3e\x2c\xbd\x83\x26\x00\x24\x13\x01\
+\x13\x02\x13\x03\xc0\x2b\xc0\x2f\xc0\x2c\xc0\x30\xcc\xa9\xcc\xa8\
+\xc0\x09\xc0\x13\xc0\x0a\xc0\x14\x00\x9c\x00\x9d\x00\x2f\x00\x35\
+\x00\x0a\x01\x00\x01\xd5\x00\x00\x00\x17\x00\x15\x00\x00\x12\x77\
+\x77\x77\x2e\x63\x6c\x6f\x75\x64\x66\x6c\x61\x72\x65\x2e\x63\x6f\
+\x6d\x00\x17\x00\x00\xff\x01\x00\x01\x00\x00\x0a\x00\x04\x00\x02\
+\xfe\x32\x00\x0b\x00\x02\x01\x00\x00\x23\x00\x00\x00\x0d\x00\x14\
+\x00\x12\x04\x03\x08\x04\x04\x01\x05\x03\x08\x05\x05\x01\x08\x06\
+\x06\x01\x02\x01\x00\x33\x01\x70\x01\x6e\xfe\x32\x01\x6a\x3d\x8e\
+\x3e\x33\x88\xb4\x2e\xf9\x24\x6d\x42\x4a\xa1\x20\xc9\x8a\x94\xec\
+\x68\xa0\x91\x83\xa9\x9b\xb3\x1f\x80\x17\x7f\xb2\xf0\x31\xc8\x04\
+\x32\x67\x42\xc8\xda\x9a\x4d\x33\xbf\xb7\xa8\xb5\x1a\xea\x81\x7d\
+\xfc\xc6\xad\x71\x10\x3e\xef\x8f\x70\xcd\x07\x30\x57\x1c\xe4\x2c\
+\xec\xca\xbb\xbb\x57\x85\xcf\x83\x93\x1b\x57\x73\xdd\xc8\x84\x77\
+\x42\xc3\x8b\x87\x00\xd9\x64\xeb\xa5\xfa\xcb\xbd\xa9\x94\x2e\xd8\
+\x17\xf5\x77\x28\x8c\x77\xe5\x11\xbd\x51\x76\x52\x89\x50\x56\x7a\
+\x3d\xbf\xfd\xa1\x22\xb0\xc7\xc4\xad\x89\x31\x27\x20\x7a\x45\x43\
+\x6a\xf6\x3c\xff\x71\x11\xbd\x28\xf7\x78\x2f\x01\x36\x0e\x18\x72\
+\xf3\x8a\x5f\x0e\x34\x6f\xa1\x8e\x33\xeb\x02\x25\x1e\xb8\x61\xb0\
+\x10\xb0\xca\x03\x6b\x03\x3e\x71\x9a\xf9\x93\x83\x36\x29\x11\xdc\
+\x89\xbd\xa3\xb1\x9b\xac\x3b\x39\x1c\xdc\xf3\x4e\xff\x9d\x86\xb6\
+\xc8\x66\x00\x1b\x5e\x0f\x2b\xa2\x08\xde\x4c\xa6\x18\x03\x83\x89\
+\x50\x7f\x60\x29\xfa\xac\xf1\x64\xfd\xbc\x0c\x6c\x3c\x48\x73\xd4\
+\xc8\x24\xe4\x25\x9d\xb1\xd5\x14\xfa\x54\xc8\xea\xdc\xa1\xb0\x03\
+\x4e\xad\x29\x29\xb7\xb6\x8d\xd2\xef\x00\x82\xb0\x3c\x2e\x01\x0b\
+\xc3\x4e\x61\x04\xad\xd1\xbd\x4e\xac\x4a\xb5\x40\x46\x36\xfc\xf3\
+\x48\xb1\x10\xfb\xcc\xd7\x3b\xa1\xc1\xca\x9e\xf2\xdd\x80\x7d\x8c\
+\x12\xfc\x22\x05\x2d\xd8\x15\x8a\x33\x73\xc8\x92\xbd\xf0\x92\x51\
+\x00\x5c\xa1\x7b\x4d\x95\x92\xd9\x52\x17\x7b\xbb\xaa\xa1\x02\xc7\
+\x2c\x82\x51\x9a\xf0\xb3\xb0\xb7\x28\x78\x85\xf4\x0d\xee\xa4\x1b\
+\x67\x72\x25\xf3\x77\xcf\x55\x11\x10\x3b\xa7\xad\xed\x32\x10\x41\
+\xdd\x43\x85\xfd\x00\x68\x10\x01\x00\x2d\x00\x02\x01\x01\x00\x2b\
+\x00\x09\x08\x03\x04\x03\x03\x03\x02\x03\x01";
+
+static CH_NTRU: &'static [u8] = b"\
+\x16\x03\x01\x05\x6e\x01\x00\x05\x6a\x03\x03\xea\xc2\x1e\xc1\x29\
+\x8a\xee\x5b\x02\xf1\x7d\x1c\xf3\x54\x02\x8c\x87\x40\x56\x16\xad\
+\xa9\x11\xf2\x48\x8a\xde\x33\x82\x42\x02\x04\x20\xd3\x7f\x7a\x35\
+\xd3\x8f\xa1\x55\xe2\x49\x78\xca\xc0\xff\x48\xfc\x34\x72\x06\x85\
+\xd9\x71\xaf\xb8\xfc\xdf\xef\x2f\x24\xf2\xf2\x51\x00\x24\x13\x01\
+\x13\x02\x13\x03\xc0\x2b\xc0\x2f\xc0\x2c\xc0\x30\xcc\xa9\xcc\xa8\
+\xc0\x09\xc0\x13\xc0\x0a\xc0\x14\x00\x9c\x00\x9d\x00\x2f\x00\x35\
+\x00\x0a\x01\x00\x04\xfd\x00\x00\x00\x17\x00\x15\x00\x00\x12\x77\
+\x77\x77\x2e\x63\x6c\x6f\x75\x64\x66\x6c\x61\x72\x65\x2e\x63\x6f\
+\x6d\x00\x17\x00\x00\xff\x01\x00\x01\x00\x00\x0a\x00\x04\x00\x02\
+\x41\x38\x00\x0b\x00\x02\x01\x00\x00\x23\x00\x00\x00\x0d\x00\x14\
+\x00\x12\x04\x03\x08\x04\x04\x01\x05\x03\x08\x05\x05\x01\x08\x06\
+\x06\x01\x02\x01\x00\x33\x04\x98\x04\x96\x41\x38\x04\x92\xef\x1c\
+\x6b\x86\x5c\x41\xd0\x92\x5c\xcd\x8e\x44\xea\xbb\x5e\xb8\x7d\xd1\
+\x96\x41\xeb\xd8\x59\xa1\xf0\xd0\x09\x6d\x50\xca\x69\x7c\xa0\x29\
+\x5a\xb6\x07\xd6\xb9\x89\x0d\x4c\x29\xc5\x5e\xb8\xf9\x08\x34\xce\
+\xde\xa3\xe0\x04\xee\xfc\x92\x06\x97\xc8\x5f\x48\x27\xd6\xe5\x36\
+\xed\x48\x2d\x35\x84\xc2\x87\xc7\x5a\xc6\xbe\xdd\xc2\x52\x12\x23\
+\xee\xa5\x0d\x95\xed\xaa\xee\xa6\x83\x4d\x61\xe9\xae\x6a\xb1\x49\
+\x95\x5e\x0c\x55\xa1\x53\x48\xe5\x63\x3f\x7c\x85\xb6\xad\xd7\xc6\
+\x23\xba\x67\xea\xf4\x0d\x5d\x08\x41\xf9\x46\xab\x86\x6d\x9c\xa3\
+\x34\x1d\x77\x80\x3a\xe3\xab\x62\x24\xcb\x9a\xd9\xca\x2e\xb6\xa6\
+\x24\x7d\xb5\x6b\x8c\xd5\x46\x03\x52\x36\xa0\x35\xdd\xc4\x52\xa1\
+\x74\x1e\x82\xb1\xe0\xc4\x41\xf1\x0b\xa6\xd5\x51\xd1\xd0\x11\xe4\
+\x76\x2c\x32\x49\xc6\xc7\x1c\xca\xb2\x4a\xd5\x76\x33\xbf\x52\x8f\
+\xd1\x04\x07\xba\x4b\x91\x30\xd8\x35\x01\x62\xdb\x8f\x9f\x48\xd0\
+\xf3\x2c\x86\x05\x0e\xaf\x32\xe8\x91\x7b\xa8\x8d\xd2\xf3\x1e\x61\
+\x6d\xa3\x3a\x44\x23\x64\xf2\x6e\x53\x90\x33\xd7\x75\x71\x34\x27\
+\xfd\x77\x7c\x11\xcc\x21\x19\x96\x2d\x65\xa5\xff\xdc\x9b\x3b\x05\
+\xec\xc2\xe2\x3c\xf0\xad\xa7\xd7\x69\xcf\x83\xa7\xb9\xd9\x61\x99\
+\xcc\x50\xee\x8d\x76\xac\xf6\x3d\x60\x39\xda\xbc\x96\x1a\xb5\x77\
+\xe6\x59\xa4\x72\x54\xee\xc8\x93\x69\x40\x24\xc5\xc2\xdb\x49\x23\
+\xf8\xce\xdf\x7e\x59\x80\x4d\x1d\xf9\x06\xf9\x8f\xf1\xd8\xf7\xd3\
+\x56\xc2\xfd\x0c\x1c\xe0\x33\x63\xed\x47\xa7\xce\xb6\x2a\x85\x1b\
+\x86\x69\xb9\x46\x37\x36\xac\xa5\x10\xe3\x0c\x77\xac\x0b\x17\x39\
+\x88\xc3\x71\xac\xdb\x88\x04\x77\x7a\x49\xaf\x9a\xd2\xe6\x27\x51\
+\x99\x41\xd9\xea\x9b\x23\x38\xd8\x96\x83\xaa\x0e\x3a\x7c\xe8\x3d\
+\x50\x0d\xce\x40\xf2\x77\x1c\x2c\x1f\x20\x4f\x83\x7f\xfa\xc9\xf9\
+\xf3\x17\x8d\xba\x92\xee\x18\xa6\xc1\x9f\x1a\x7b\x5d\xd2\xe3\x4f\
+\xab\x49\xb3\xf1\x91\xc4\xd6\x7f\x32\xda\xad\x24\x41\x58\xef\xc5\
+\xc6\xcc\x58\x6a\x69\x21\x0b\x6f\xa2\x02\xcc\x91\xe2\x2f\x68\x41\
+\x43\x9b\x38\x1b\xfa\x03\x1b\x40\x5a\xdc\xfa\x25\xda\x21\x11\x4b\
+\x40\x9f\x79\x13\xce\x77\x8d\xbb\x37\x04\xc3\x49\x0f\xf7\xd8\x70\
+\xf4\x4e\xa3\xe1\x1b\x00\x09\x3a\x09\xb9\xed\x02\xbc\x06\xb7\x54\
+\x75\x2a\x67\x97\xaf\x13\x0d\xd9\x3c\xa9\xff\x48\x66\x3a\xa8\x5b\
+\x20\x23\xc7\xf9\x45\x16\x5f\x6c\xa1\x19\xc2\x54\xff\xd9\x5e\xbe\
+\xcd\x73\xc1\x41\x09\xf7\xef\xc9\x26\x4b\x9d\xeb\x0c\x16\x06\x92\
+\x66\x9d\x8e\xa0\x54\xe8\xe5\x9f\x6c\xfd\x79\x3a\xdd\xc8\x4c\xb8\
+\xab\xfa\x42\xfd\x44\x50\xa1\x38\x9f\x6d\xef\x80\xf4\xd3\xe4\x06\
+\x5c\xf7\x2e\x01\x75\xd8\x0c\xb9\x01\x7a\xf0\x71\x91\x5d\x1e\x6d\
+\x03\x19\x2d\x59\x4d\x8a\x48\x3d\x9c\x4d\x93\xc4\xa3\x9a\xd1\xf5\
+\x98\xf6\xf7\x2b\xf1\x9b\xbc\x06\x05\x04\xb6\x4b\x97\x55\x7d\x09\
+\x4a\xf6\x69\xf6\x46\x76\xdf\x68\xd6\xd1\x82\xa5\xa6\xc1\x8b\xb9\
+\x80\x55\xca\x7b\x6a\x58\x67\x73\x26\xbb\x77\x2c\xa5\xe1\xe2\xc6\
+\x5f\x99\x39\x53\xbc\x66\x4f\x2e\xcf\xa8\xe5\x49\xea\xa1\x5b\xaf\
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+\x02\x03\x01";
+
+fn sleep(millis: u64, cmt: &'static str) {
+	println!("[START] {}", cmt);
+	sleep_no_comment(millis);
+	println!("[DONE] {}", cmt);
+}
+
+fn sleep_no_comment(millis: u64) {
+	let ten_millis = time::Duration::from_millis(millis);
+	let _now = time::Instant::now();
+	thread::sleep(ten_millis);
+}
+
+fn main() -> std::io::Result<()> {
+	// Condition variables to control threads
+	let (flag_t1, control_t1) = make_pair();
+	let (flag_t2, control_t2) = make_pair();
+
+	ctrlc::set_handler(move || {
+        println!("Stopping...");
+		control_t1.stop();
+		control_t2.stop();
+    }).expect("Error setting Ctrl-C handler");
+
+	// Parse arguments
+	let _args: Vec<String> = env::args().collect();
+	// Argument 1 - <host>:<port>
+	let addr_iter = _args[1].to_socket_addrs().unwrap();
+	// Argument 2 - timeout tcp TO. Fallback to 1 sec
+	let dur_sec: u64 = _args[2].parse().unwrap_or(1);
+	let dur = Duration::new(dur_sec, 0);
+	// Argument 3 - which client hello to send
+	let ch_case: usize = _args[3].parse().unwrap();
+	// Argument 4 - Sends per second
+	let msg_per_sec: usize = _args[4].parse().unwrap();
+	// Argument 5 - Number of connections to keep open
+	let con_num: usize = _args[5].parse().unwrap();
+
+	// create FIFO
+	println!("We will keep {} connections open", con_num);
+	let (tx, rx) = sync_channel(con_num);
+
+	// Start a thread which sends CH
+	let _t1 = thread::spawn(move || {
+		let mut sent = 0;
+		while flag_t1.is_alive() {
+			// wait until connections are produced
+			while rx.try_iter().next().is_none() {
+				sleep(100, "Waiting for connections");
+			}
+			// receive next connection and send CH
+			let mut s: TcpStream = rx.recv().unwrap();
+			match ch_case {
+				1 => s.write(&CH_NTRU).unwrap(),
+				2 => s.write(&CH_SIKE).unwrap(),
+				3 => s.write(&CH_X25519).unwrap(),
+				4 => s.write(&CH_P521).unwrap(),
+				_ => panic!("Unknown case"),
+			};
+			s.shutdown(Shutdown::Both).expect("shutdown call failed");
+			sleep_no_comment(1000/msg_per_sec as u64);
+			sent += 1;
+			if sent % 100 == 0 {
+				println!("nb of queries sent: {}", sent);
+			}
+		}
+	});
+
+	// Start a thread which produces connections
+	let _t2 = thread::spawn(move || {
+		// First thread owns tx
+		while flag_t2.is_alive() {
+			let addr_ref = &addr_iter.as_slice()[0];
+			let sock = TcpStream::connect_timeout(addr_ref, dur);
+			if sock.is_err() {
+				sleep(1000, "Can't connect, waiting...");
+				continue;
+			}
+			let s = sock.unwrap();
+			s.set_nonblocking(true).expect("set_nonblocking call failed");
+
+		    match tx.try_send(s) {
+		    	Err(_) => sleep(1000, "Can't put in the queue"),
+		    	Ok(_) => continue,
+		    }
+		}
+	});
+
+	// wait for TX thread to finish
+	_t1.join().unwrap();
+	_t2.join().unwrap();
+    Ok(())
+}