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testclient.c
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// kssl_testclient.c: test program to communicate with a keyserver
//
// Copyright (c) 2013-2014 CloudFlare, Inc.
//
// Command-line options:
//
// --port
//
// TCP port to contact the kssl_server on (matches the --port parameter of
// kssl_server)
//
// --server
//
// Hostname or IP of the kssl_server.
//
// --client-cert
// --client-key
//
// The filenames of a client certificate to present to the server to verify
// that this client is a valid user of kssl_server. These must be signed by a
// CA that kssl_server can check the certificate against (i.e one in the
// --ca-file parameter of kssl_server).
//
// --ca-file
//
// Path to a PEM-encoded file containing the CA certificate used to verify
// server certificates presented on connection.
//
// --rsa-pubkey
//
// The filename of an RSA rsa_pubkey key file (PEM encoded) that is used for
// testing. This must be one of the rsa_pubkey keys specified in the
// kssl_server's --rsa_pubkey-key-directory.
//
// --debug
//
// Turns in debug logging
//
// --short
//
// Just do a connectivity test. Exit code 0 if successful.
//
// --alive
//
// Instead of performing all the tests this simply checks connectivity with
// the kssl_server by running a limit number of tests.
#include "kssl.h"
#include "kssl_helpers.h"
#include "kssl_private_key.h"
#if PLATFORM_WINDOWS
#include <winsock2.h>
#else
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <pthread.h>
#include <sys/wait.h>
#include <sys/types.h>
#endif
#include <ctype.h>
#include <uv.h>
#include <openssl/evp.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <sys/types.h>
#include <stdarg.h>
#include "kssl_getopt.h"
unsigned char ipv6[16] = {0x0, 0xf2, 0x13, 0x48, 0x43, 0x01};
unsigned char ipv4[4] = {127, 0, 0, 1};
#if PLATFORM_WINDOWS
#define SOCKET_CLOSE closesocket
#else
#define SOCKET_CLOSE close
#endif
// libuv locking primitives
#define MUTEX_TYPE uv_mutex_t
#define MUTEX_SETUP(x) uv_mutex_init(&(x))
#define MUTEX_CLEANUP(x) uv_mutex_destroy(&(x))
#define MUTEX_LOCK(x) uv_mutex_lock(&(x))
#define MUTEX_UNLOCK(x) uv_mutex_unlock(&(x))
#define THREAD_ID uv_thread_self()
struct hostent *localhost;
char *server = 0;
int tests = 0;
int debug = 0;
int health = 0;
int alive = 0;
// This array will store all of the mutexes available to OpenSSL.
static MUTEX_TYPE *mutex_buf=NULL;
static void locking_function(int mode, int n, const char * file, int line)
{
if (mode & CRYPTO_LOCK)
MUTEX_LOCK(mutex_buf[n]);
else
MUTEX_UNLOCK(mutex_buf[n]);
}
static unsigned long id_function(void)
{
return ((unsigned long)THREAD_ID);
}
int thread_setup(void)
{
int i;
mutex_buf = malloc(CRYPTO_num_locks() * sizeof(MUTEX_TYPE));
if (!mutex_buf)
return 0;
for (i = 0; i < CRYPTO_num_locks(); i++)
MUTEX_SETUP(mutex_buf[i]);
CRYPTO_set_id_callback(id_function);
CRYPTO_set_locking_callback(locking_function);
return 1;
}
int thread_cleanup(void)
{
int i;
if (!mutex_buf)
return 0;
CRYPTO_set_id_callback(NULL);
CRYPTO_set_locking_callback(NULL);
for (i = 0; i < CRYPTO_num_locks(); i++)
MUTEX_CLEANUP(mutex_buf[i]);
free(mutex_buf);
mutex_buf = NULL;
return 1;
}
// ssl_error: call when a fatal SSL error occurs. Exits the program
// with return code 1.
void ssl_error(void)
{
ERR_print_errors_fp(stderr);
exit(1);
}
// fatal_error: call to print an error message to STDERR. Exits the
// program with return code 1.
void fatal_error(const char *fmt, ...)
{
va_list l;
va_start(l, fmt);
vfprintf(stderr, fmt, l);
va_end(l);
fprintf(stderr, "\n");
exit(1);
}
// digest_public_rsa: calculates the SHA256 digest of the
// hexadecimal representation of the public modulus of an RSA
// key. digest must be initialized with at least 32 bytes of
// space.
void digest_public_rsa(RSA *key, BYTE *digest)
{
// QUESTION: can we use a single EVP_MD_CTX for multiple
// digests?
char *hex;
EVP_MD_CTX *ctx;
ctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(ctx, EVP_sha256(), 0);
hex = BN_bn2hex(key->n);
EVP_DigestUpdate(ctx, hex, strlen(hex));
EVP_DigestFinal_ex(ctx, digest, 0);
EVP_MD_CTX_destroy(ctx);
OPENSSL_free(hex);
}
// digest_public_ec: calculates the SHA256 digest of the
// hexadecimal representation of the EC public key group and
// point. digest must be initialized with at least 32 bytes of
// space.
void digest_public_ec(EC_KEY *ec_key, BYTE *digest) {
const EC_POINT *ec_pub_key = EC_KEY_get0_public_key(ec_key);
const EC_GROUP *group = EC_KEY_get0_group(ec_key);
char *hex = EC_POINT_point2hex(group, ec_pub_key, POINT_CONVERSION_COMPRESSED, NULL);
EVP_MD_CTX *ctx;
ctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(ctx, EVP_sha256(), 0);
EVP_DigestUpdate(ctx, hex, strlen(hex));
EVP_DigestFinal_ex(ctx, digest, 0);
EVP_MD_CTX_destroy(ctx);
OPENSSL_free(hex);
}
// ok: indicate that some tests passed and free memory
void ok(kssl_header *h)
{
if (!alive) {
printf(" ok\n");
}
if (h != 0) {
free(h->data);
free(h);
}
}
// test: start a set of test
void test(const char *fmt, ...)
{
if (!alive) {
va_list l;
va_start(l, fmt);
vfprintf(stderr, fmt, l);
va_end(l);
}
}
// test_assert: assert that some condition is true, fatal
// error if not
void test_assert(int a)
{
if (!a) {
fatal_error(" test failure");
}
tests += 1;
}
static void dump_request(kssl_operation *request) {
BYTE op;
BYTE *p = request->payload;
int l = request->payload_len;
if (!debug) {
return;
}
op = request->opcode;
printf("OPCODE: %s ", opstring(op));
if (op == KSSL_OP_RSA_DECRYPT) {
int i;
printf(" Digest: ");
for (i = 0; i < KSSL_DIGEST_SIZE; ++i) {
printf("%02x", request->digest[i]);
}
printf("\n");
}
if (op == KSSL_OP_ERROR && request->payload_len > 0) {
printf(" Error: ");
switch(request->payload[0]) {
case KSSL_ERROR_CRYPTO_FAILED:
printf("KSSL_ERROR_CRYPTO_FAILED\n");
break;
case KSSL_ERROR_KEY_NOT_FOUND:
printf("KSSL_ERROR_KEY_NOT_FOUND\n");
break;
case KSSL_ERROR_BAD_OPCODE:
printf("KSSL_ERROR_BAD_OPCODE\n");
break;
case KSSL_ERROR_READ:
printf("KSSL_ERROR_READ\n");
break;
case KSSL_ERROR_VERSION_MISMATCH:
printf("KSSL_ERROR_VERSION_MISMATCH\n");
break;
case KSSL_ERROR_UNEXPECTED_OPCODE:
printf("KSSL_ERROR_UNEXPECTED_OPCODE\n");
break;
default:
printf("unknown KSSL error: %02x\n", request->payload[0]);
break;
}
return;
}
if (l > 0) {
int printable = 1;
int i;
for (i = 0; i < l; i++) {
if (iscntrl(p[i])) {
printable = 0;
break;
}
}
printf(" Payload: ");
for (i = 0; i < l; ++i) {
if (!printable && (i != 0) && (i%16 == 0)) {
printf("\n ");
}
printf(printable?"%c":"%02x ", p[i]);
}
printf("\n");
}
}
// dump_payload: print out the payload from a KSSL operation in hex
void dump_payload(int l, BYTE *p)
{
kssl_operation request;
if (!debug) return;
if (l > 0) {
int i;
printf(" Payload Raw: ");
for (i = 0; i < l; ++i) {
if ((i != 0) && (i%16 == 0)) {
printf("\n ");
}
printf("%02x ", p[i]);
}
printf("\n");
}
parse_message_payload(p, l, &request);
dump_request(&request);
}
// dump_header: print out a KSSL header
void dump_header(kssl_header *k, const char *msg)
{
if (debug) {
printf(" KSSL %s: %02x %02x %08x %d\n", msg, k->version_maj, k->version_min,
k->id, k->length);
}
}
// kssl: send a KSSL message to the server and read the response
kssl_header *kssl(SSL *ssl, kssl_header *k, kssl_operation *r)
{
BYTE buf[KSSL_HEADER_SIZE];
BYTE *req;
int req_len;
int n;
kssl_header h;
kssl_header *to_return;
flatten_operation(k, r, &req, &req_len);
dump_header(k, "send");
dump_request(r);
n = SSL_write(ssl, req, req_len);
if (n != req_len) {
fatal_error("Failed to send KSSL header");
}
free(req);
while (1) {
n = SSL_read(ssl, buf, KSSL_HEADER_SIZE);
if (n <= 0) {
int x = SSL_get_error(ssl, n);
if (x == SSL_ERROR_WANT_READ || x == SSL_ERROR_WANT_WRITE) {
continue;
} else if (x == SSL_ERROR_ZERO_RETURN) {
fatal_error("Connection closed while reading header\n");
} else {
fatal_error("Error performing SSL_read: %x\n", x);
}
} else {
if (n != KSSL_HEADER_SIZE) {
fatal_error("Error receiving KSSL header, size: %d", n);
}
}
break;
}
parse_header(buf, &h);
if (h.version_maj != KSSL_VERSION_MAJ) {
fatal_error("Version mismatch %d != %d", h.version_maj, KSSL_VERSION_MAJ);
}
if (k->id != h.id) {
fatal_error("ID mismatch %08x != %08x", k->id, h.id);
}
dump_header(&h, "recv");
to_return = (kssl_header *)malloc(sizeof(kssl_header));
memcpy(to_return, &h, sizeof(kssl_header));
if (h.length > 0) {
BYTE *payload = (BYTE *)malloc(h.length);
while (1) {
n = SSL_read(ssl, payload, h.length);
if (n <= 0) {
int x = SSL_get_error(ssl, n);
if (x == SSL_ERROR_WANT_READ || x == SSL_ERROR_WANT_WRITE) {
continue;
} else if (x == SSL_ERROR_ZERO_RETURN) {
fatal_error("Connection closed while reading payload\n");
} else {
fatal_error("Error performing SSL_read: %x\n", x);
}
} else {
if (n != h.length) {
fatal_error("Error receiving KSSL payload, size: %d", n);
}
}
break;
}
if (n != h.length) {
fatal_error("Failed to read payload got length %d wanted %d", n, h.length);
}
dump_payload(h.length, payload);
to_return->data = payload;
}
return to_return;
}
void kssl_write(SSL *ssl, kssl_header *k, kssl_operation *r)
{
BYTE *req;
int req_len, n;
flatten_operation(k, r, &req, &req_len);
dump_header(k, "send");
dump_request(r);
n = SSL_write(ssl, req, req_len);
if (n != req_len) {
fatal_error("Failed to send KSSL header");
}
free(req);
}
kssl_header* kssl_read(SSL *ssl, kssl_header *k, kssl_operation *r)
{
kssl_header h, *to_return;
BYTE buf[KSSL_HEADER_SIZE];
int n;
while (1) {
n = SSL_read(ssl, buf, KSSL_HEADER_SIZE);
if (n <= 0) {
int x = SSL_get_error(ssl, n);
if (x == SSL_ERROR_WANT_READ || x == SSL_ERROR_WANT_WRITE) {
continue;
} else if (x == SSL_ERROR_ZERO_RETURN) {
fatal_error("Connection closed while reading header\n");
} else {
fatal_error("Error performing SSL_read: %x\n", x);
}
} else {
if (n != KSSL_HEADER_SIZE) {
fatal_error("Error receiving KSSL header, size: %d", n);
}
}
break;
}
parse_header(buf, &h);
if (h.version_maj != KSSL_VERSION_MAJ) {
fatal_error("Version mismatch %d != %d", h.version_maj, KSSL_VERSION_MAJ);
}
if (k->id != h.id) {
fatal_error("ID mismatch %08x != %08x", k->id, h.id);
}
dump_header(&h, "recv");
to_return = (kssl_header *)malloc(sizeof(kssl_header));
memcpy(to_return, &h, sizeof(kssl_header));
to_return->data = 0;
if (h.length > 0) {
BYTE *payload = (BYTE *)malloc(h.length);
while (1) {
n = SSL_read(ssl, payload, h.length);
if (n <= 0) {
int x = SSL_get_error(ssl, n);
if (x == SSL_ERROR_WANT_READ || x == SSL_ERROR_WANT_WRITE) {
continue;
} else if (x == SSL_ERROR_ZERO_RETURN) {
fatal_error("Connection closed while reading payload\n");
} else {
fatal_error("Error performing SSL_read: %x\n", x);
}
} else {
if (n != h.length) {
fatal_error("Error receiving KSSL payload, size: %d", n);
}
}
break;
}
if (n != h.length) {
fatal_error("Failed to read payload got length %d wanted %d", n, h.length);
}
dump_payload(h.length, payload);
to_return->data = payload;
}
return to_return;
}
// verify response, only verify kssl header currently
// TODO: verify different kssl payload
int verify_response(kssl_header* k, kssl_operation* r, kssl_header* resp_k)
{
test_assert(resp_k->id == k->id);
test_assert(resp_k->version_maj == KSSL_VERSION_MAJ);
// TODO: add other verification logic here
return 1;
}
// send and read pipeline requests and responses
void kssl_pipeline(SSL *ssl, kssl_header *k, kssl_operation *r, int repeat)
{
int i, cur_gap, max_gap = 300;
int w_count = 0, r_count = 0;
long int increment;
kssl_header *to_return;
srand((unsigned int) time(NULL));
while (w_count < repeat || r_count < repeat) {
cur_gap = w_count - r_count;
// pipeline write
increment = (random() % max_gap);
if ((increment + cur_gap) > max_gap) {
increment = max_gap - cur_gap;
}
if ((increment + w_count) > repeat) {
increment = repeat - w_count;
}
for (i = 0; i < increment; i++) {
kssl_write(ssl, k, r);
w_count += 1;
}
// pipeline read
increment = (random() % max_gap);
if ((r_count + increment) > w_count) {
increment = w_count - r_count;
}
for (i = 0; i < increment; i++) {
to_return = kssl_read(ssl, k, r);
verify_response(k, r, to_return);
free(to_return->data);
free(to_return);
r_count += 1;
}
}
}
typedef struct {
SSL *ssl;
int fd;
} connection;
void kssl_bad_opcode(connection *c)
{
kssl_header bad;
kssl_operation req, resp;
kssl_header *h;
test("Bad KSSL opcode (%p)", c);
bad.version_maj = KSSL_VERSION_MAJ;
bad.version_min = KSSL_VERSION_MIN;
bad.id = 0x12345678;
bad.length = 0; // to be overridden by serialization
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = 0xBB;
req.payload_len = 0;
h = kssl(c->ssl, &bad, &req);
test_assert(h->id == bad.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_ERROR);
test_assert(resp.payload_len == 1);
test_assert(resp.payload[0] == KSSL_ERROR_BAD_OPCODE);
ok(h);
}
void kssl_op_pong(connection *c)
{
kssl_header echo0;
kssl_operation req, resp;
kssl_header *h;
test("KSSL_OP_PONG (%p)", c);
echo0.version_maj = KSSL_VERSION_MAJ;
echo0.version_min = KSSL_VERSION_MIN;
echo0.id = 0x12345678;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PONG;
req.payload_len = 0;
h = kssl(c->ssl, &echo0, &req);
test_assert(h->id == echo0.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_ERROR);
test_assert(resp.payload_len == 1);
test_assert(resp.payload[0] == KSSL_ERROR_UNEXPECTED_OPCODE);
ok(h);
}
void kssl_op_error(connection *c)
{
kssl_header echo0;
kssl_operation req, resp;
kssl_header *h;
test("KSSL_OP_ERROR (%p)", c);
echo0.version_maj = KSSL_VERSION_MAJ;
echo0.id = 0x12345678;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_ERROR;
req.payload_len = 0;
h = kssl(c->ssl, &echo0, &req);
test_assert(h->id == echo0.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_ERROR);
test_assert(resp.payload_len == 1);
test_assert(resp.payload[0] == KSSL_ERROR_UNEXPECTED_OPCODE);
ok(h);
}
void kssl_op_ping_no_payload(connection *c)
{
kssl_header echo0;
kssl_operation req, resp;
kssl_header *h;
test("KSSL_OP_PING with no payload (%p)", c);
echo0.version_maj = KSSL_VERSION_MAJ;
echo0.id = 0x12345678;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PING;
req.payload_len = 0;
h = kssl(c->ssl, &echo0, &req);
test_assert(h->id == echo0.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_PONG);
test_assert(resp.payload_len == 0);
ok(h);
}
void kssl_op_ping_payload(connection *c)
{
const char *hello = "Hello, World!";
kssl_operation req, resp;
kssl_header echo1;
kssl_header *h;
BYTE *payload;
test("KSSL_OP_PING with payload (%p)", c);
payload = malloc(strlen(hello) + 1);
echo1.version_maj = KSSL_VERSION_MAJ;
echo1.id = 0x12345679;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PING;
req.payload_len = strlen(hello);
req.payload = payload;
memcpy((char *)payload, hello, strlen(hello));
h = kssl(c->ssl, &echo1, &req);
test_assert(h->id == echo1.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_PONG);
test_assert(resp.payload_len == req.payload_len);
test_assert(strncmp((char *)resp.payload, (char *)req.payload, strlen(hello)) == 0);
ok(h);
free(payload);
}
void kssl_repeat_op_ping(connection *c, int repeat)
{
char hello[255];
kssl_header echo1;
kssl_operation req, resp;
kssl_header *h;
int i;
BYTE *payload = malloc(255 + 1);
test("Repeat KSSL_OP_PING %d times (%p)", repeat, c);
echo1.version_maj = KSSL_VERSION_MAJ;
echo1.id = 0x12345679;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PING;
req.payload_len = 255 + 1;
req.payload = payload;
for (i = 0; i < repeat; i++) {
sprintf(hello, "Hello, World! %d", i);
memcpy((char *)payload, hello, strlen(hello)+1);
req.payload_len = strlen(hello)+1;
h = kssl(c->ssl, &echo1, &req);
test_assert(h->id == echo1.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_PONG);
test_assert(resp.payload_len == req.payload_len);
test_assert(strncmp((char *)resp.payload, (char *)req.payload, strlen(hello)) == 0);
free(h->data);
free(h);
}
ok(0);
free(payload);
}
void kssl_pipeline_op_ping(connection *c, int repeat)
{
char hello[255];
kssl_header echo1;
kssl_operation req;
BYTE *payload = malloc(255 + 1);
test("Pipeline KSSL_OP_PING %d times (%p)", repeat, c);
echo1.version_maj = KSSL_VERSION_MAJ;
echo1.id = 0x12345679;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PING;
req.payload_len = 255 + 1;
req.payload = payload;
sprintf(hello, "Hello, World! Pipeline");
memcpy((char *)payload, hello, strlen(hello)+1);
req.payload_len = strlen(hello)+1;
kssl_pipeline(c->ssl, &echo1, &req, repeat);
ok(0);
free(payload);
}
void kssl_op_ping_bad_version(connection *c)
{
kssl_header echo0;
kssl_operation req, resp;
kssl_header *h;
test("KSSL_OP_PING with bad version (%p)", c);
echo0.id = 0x12345678;
echo0.version_maj = KSSL_VERSION_MAJ+1;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.opcode = KSSL_OP_PING;
req.payload_len = 0;
h = kssl(c->ssl, &echo0, &req);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
test_assert(h->id == echo0.id);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_ERROR);
test_assert(resp.payload_len == 1);
test_assert(resp.payload[0] == KSSL_ERROR_VERSION_MISMATCH);
ok(h);
}
void kssl_op_rsa_decrypt(connection *c, RSA *rsa_pubkey)
{
static int count = 0;
char kryptos2[255];
kssl_header decrypt;
kssl_operation req, resp;
kssl_header *h;
int size;
test("KSSL_OP_RSA_DECRYPT (%p)", c);
decrypt.version_maj = KSSL_VERSION_MAJ;
decrypt.id = 0x1234567a;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.is_digest_set = 1;
req.is_ip_set = 1;
req.ip = ipv6;
req.ip_len = 16;
req.payload = malloc(RSA_size(rsa_pubkey));
req.payload_len = RSA_size(rsa_pubkey);
req.digest = malloc(KSSL_DIGEST_SIZE);
digest_public_rsa(rsa_pubkey, req.digest);
req.opcode = KSSL_OP_RSA_DECRYPT;
sprintf(kryptos2, "%02x It was totally invisible, how's that possible?", count);
count += 1;
size = RSA_public_encrypt(strlen(kryptos2), (unsigned char *)kryptos2,
(unsigned char *)req.payload,
rsa_pubkey, RSA_PKCS1_PADDING);
if (size == -1) {
fatal_error("Failed to RSA encrypt");
}
h = kssl(c->ssl, &decrypt, &req);
test_assert(h->id == decrypt.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_RESPONSE);
test_assert(resp.payload_len == strlen(kryptos2));
test_assert(strncmp((char *)resp.payload, kryptos2, strlen(kryptos2)) == 0);
ok(h);
free(req.payload);
free(req.digest);
}
void kssl_op_rsa_decrypt_raw(connection *c, RSA *rsa_pubkey)
{
static int count = 0;
char kryptos2[255];
char unpadded_resp[255];
int unpadded_len;
kssl_header decrypt;
kssl_operation req, resp;
kssl_header *h;
int size;
test("KSSL_OP_RSA_DECRYPT_RAW (%p)", c);
decrypt.version_maj = KSSL_VERSION_MAJ;
decrypt.id = 0x1234567a;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.is_digest_set = 1;
req.is_ip_set = 1;
req.ip = ipv6;
req.ip_len = 16;
req.payload = malloc(RSA_size(rsa_pubkey));
req.payload_len = RSA_size(rsa_pubkey);
req.digest = malloc(KSSL_DIGEST_SIZE);
digest_public_rsa(rsa_pubkey, req.digest);
req.opcode = KSSL_OP_RSA_DECRYPT_RAW;
sprintf(kryptos2, "%02x It was totally invisible, how's that possible?", count);
count += 1;
size = RSA_public_encrypt(strlen(kryptos2), (unsigned char *)kryptos2,
(unsigned char *)req.payload,
rsa_pubkey, RSA_PKCS1_PADDING);
if (size == -1) {
fatal_error("Failed to RSA encrypt");
}
h = kssl(c->ssl, &decrypt, &req);
test_assert(h->id == decrypt.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_RESPONSE);
test_assert(resp.payload_len == RSA_size(rsa_pubkey));
test_assert(*(resp.payload++) == 0);
unpadded_len = RSA_padding_check_PKCS1_type_2((unsigned char *)unpadded_resp,
sizeof(unpadded_resp),
resp.payload,
resp.payload_len-1,
RSA_size(rsa_pubkey));
test_assert(unpadded_len == (int)strlen(kryptos2));
test_assert(strncmp(unpadded_resp, kryptos2, strlen(kryptos2)) == 0);
ok(h);
free(req.payload);
free(req.digest);
}
#define ALGS_COUNT 6
// RSA signing algorithm opcodes
static int rsa_algs[ALGS_COUNT] = {
KSSL_OP_RSA_SIGN_MD5SHA1,
KSSL_OP_RSA_SIGN_SHA1,
KSSL_OP_RSA_SIGN_SHA224,
KSSL_OP_RSA_SIGN_SHA256,
KSSL_OP_RSA_SIGN_SHA384,
KSSL_OP_RSA_SIGN_SHA512,
};
// ECDSA signing algorithm opcodes
static int ecdsa_algs[ALGS_COUNT] = {
KSSL_OP_ECDSA_SIGN_MD5SHA1,
KSSL_OP_ECDSA_SIGN_SHA1,
KSSL_OP_ECDSA_SIGN_SHA224,
KSSL_OP_ECDSA_SIGN_SHA256,
KSSL_OP_ECDSA_SIGN_SHA384,
KSSL_OP_ECDSA_SIGN_SHA512,
};
// OpenSSL digest NIDs
static int nid[ALGS_COUNT] = {
NID_md5_sha1,
NID_sha1,
NID_sha224,
NID_sha256,
NID_sha384,
NID_sha512,
};
// These are totally bogus but they have the right lengths (and, anyway, who's to say these aren't real
// message digests?)
static char* digests[ALGS_COUNT] = {
"123456789012345678901234567890123456", // MD5SH1 is 36 bytes
"12345678901234567890", // SHA1 is 20 bytes
"1234567890123456789012345678", // SHA224 is 28 bytes
"12345678901234567890123456789012", // SHA256 is 32 bytes
"123456789012345678901234567890123456789012345678", // SHA384 is 48 bytes
"1234567890123456789012345678901234567890123456789012345678901234", // SHA512 is 64 bytes
};
void kssl_op_rsa_sign(connection *c, RSA *rsa_pubkey, int opcode)
{
int i, rc;
kssl_header *h;
test("KSSL_OP_RSA_SIGN_* (%p)", c);
for (i = 0; i < ALGS_COUNT; i++) {
kssl_header sign;
kssl_operation req, resp;
if (opcode != rsa_algs[i] && opcode != 0) continue;
sign.version_maj = KSSL_VERSION_MAJ;
sign.id = 0x1234567a;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.is_digest_set = 1;
req.is_ip_set = 1;
req.ip = ipv4;
req.ip_len = 4;
req.digest = malloc(KSSL_DIGEST_SIZE);
digest_public_rsa(rsa_pubkey, req.digest);
req.payload = (BYTE *)digests[i];
req.payload_len = strlen(digests[i]);
req.opcode = rsa_algs[i];
h = kssl(c->ssl, &sign, &req);
test_assert(h->id == sign.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_RESPONSE);
rc = RSA_verify(nid[i], (unsigned char *)digests[i], strlen(digests[i]), resp.payload, resp.payload_len, rsa_pubkey);
test_assert(rc == 1);
free(h);
free(req.digest);
}
ok(0);
}
void kssl_op_ecdsa_sign(connection *c, EC_KEY *ecdsa_pubkey, int opcode)
{
int i, rc;
kssl_header *h;
test("KSSL_OP_ECDSA_SIGN_* (%p)", c);
for (i = 0; i < ALGS_COUNT; i++) {
kssl_header sign;
kssl_operation req, resp;
if (opcode != ecdsa_algs[i] && opcode != 0) continue;
sign.version_maj = KSSL_VERSION_MAJ;
sign.id = 0x1234567a;
zero_operation(&req);
req.is_opcode_set = 1;
req.is_payload_set = 1;
req.is_digest_set = 1;
req.is_ip_set = 1;
req.ip = ipv4;
req.ip_len = 4;
req.digest = malloc(KSSL_DIGEST_SIZE);
digest_public_ec(ecdsa_pubkey, req.digest);
req.payload = (BYTE *)digests[i];
req.payload_len = strlen(digests[i]);
req.opcode = ecdsa_algs[i];
h = kssl(c->ssl, &sign, &req);
test_assert(h->id == sign.id);
test_assert(h->version_maj == KSSL_VERSION_MAJ);
parse_message_payload(h->data, h->length, &resp);
test_assert(resp.opcode == KSSL_OP_RESPONSE);
rc = ECDSA_verify(nid[i], (unsigned char *)digests[i], strlen(digests[i]), resp.payload, resp.payload_len, ecdsa_pubkey);
test_assert(rc == 1);
free(h);
free(req.digest);