gcrypt: Fix format string in debug output.

[paraslash.git] / gcrypt.c

diff --git a/gcrypt.c b/gcrypt.c
index 1e997fb45c0bd6a753a79bfcff1db5ede4546782..f4d4cc6f9d20678ef5a6fa5b41672db108ea2345 100644 (file)
--- a/gcrypt.c
+++ b/gcrypt.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2012 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2011-2014 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -26,7 +26,7 @@ static void dump_buffer(const char *msg, unsigned char *buf, int len)
 {
        int i;
 
-       fprintf(stderr, "%s (%u bytes): ", msg, len);
+       fprintf(stderr, "%s (%d bytes): ", msg, len);
        for (i = 0; i < len; i++)
                fprintf(stderr, "%02x ", buf[i]);
        fprintf(stderr, "\n");
@@ -97,7 +97,7 @@ static void mgf1(unsigned char *seed, size_t seed_len, unsigned result_len,
 {
        gcry_error_t gret;
        gcry_md_hd_t handle;
-       size_t n;;
+       size_t n;
        unsigned char *md;
        unsigned char octet_string[4], *rp = result, *end = rp + result_len;
 
@@ -695,7 +695,6 @@ int get_asymmetric_key(const char *key_file, int private,
        key->num_bytes = ret;
        key->sexp = sexp;
        *result = key;
-       ret = key->num_bytes;
 unmap:
        ret2 = para_munmap(map, map_size);
        if (ret >= 0 && ret2 < 0)
@@ -759,13 +758,13 @@ static int decode_rsa(gcry_sexp_t sexp, int key_size, unsigned char *outbuf,
 
        PARA_DEBUG_LOG("decrypted buffer before unpad (%d bytes):\n",
                key_size);
-       dump_buffer("non-unpadded decrypted buffer", oaep_buf, key_size);;
+       dump_buffer("non-unpadded decrypted buffer", oaep_buf, key_size);
        ret = unpad_oaep(oaep_buf, key_size, outbuf, nbytes);
        if (ret < 0)
                goto out_mpi_release;
        PARA_DEBUG_LOG("decrypted buffer after unpad (%zu bytes):\n",
                *nbytes);
-       dump_buffer("unpadded decrypted buffer", outbuf, *nbytes);;
+       dump_buffer("unpadded decrypted buffer", outbuf, *nbytes);
        ret = 1;
 out_mpi_release:
        gcry_mpi_release(out_mpi);
@@ -913,11 +912,25 @@ struct stream_cipher {
        gcry_cipher_hd_t handle;
 };
 
-struct stream_cipher *sc_new(const unsigned char *data, int len)
+struct stream_cipher *sc_new(const unsigned char *data, int len,
+               bool use_aes)
 {
        gcry_error_t gret;
-
        struct stream_cipher *sc = para_malloc(sizeof(*sc));
+
+       if (use_aes) {
+               assert(len >= 2 * AES_CRT128_BLOCK_SIZE);
+               gret = gcry_cipher_open(&sc->handle, GCRY_CIPHER_AES128,
+                       GCRY_CIPHER_MODE_CTR, 0);
+               assert(gret == 0);
+               gret = gcry_cipher_setkey(sc->handle, data,
+                       AES_CRT128_BLOCK_SIZE);
+               assert(gret == 0);
+               gret = gcry_cipher_setctr(sc->handle,
+                       data + AES_CRT128_BLOCK_SIZE, AES_CRT128_BLOCK_SIZE);
+               assert(gret == 0);
+               return sc;
+       }
        gret = gcry_cipher_open(&sc->handle, GCRY_CIPHER_ARCFOUR,
                GCRY_CIPHER_MODE_STREAM, 0);
        if (gret) {
@@ -938,35 +951,14 @@ void sc_free(struct stream_cipher *sc)
        free(sc);
 }
 
-int sc_send_bin_buffer(struct stream_cipher_context *scc, char *buf,
-               size_t size)
-{
-       gcry_error_t gret;
-       int ret;
-       unsigned char *tmp = para_malloc(size);
-
-       assert(size);
-       gret = gcry_cipher_encrypt(scc->send->handle, tmp, size,
-               (unsigned char *)buf, size);
-       assert(gret == 0);
-       ret = xwrite(scc->fd, (char *)tmp, size);
-       free(tmp);
-       return ret;
-}
-
-int sc_recv_bin_buffer(struct stream_cipher_context *scc, char *buf,
-               size_t size)
+void sc_crypt(struct stream_cipher *sc, struct iovec *src, struct iovec *dst)
 {
+       gcry_cipher_hd_t handle = sc->handle;
        gcry_error_t gret;
-       ssize_t ret = recv(scc->fd, buf, size, 0);
 
-       if (ret < 0)
-               ret = -ERRNO_TO_PARA_ERROR(errno);
-       if (ret <= 0)
-               return ret;
        /* perform in-place encryption */
-       gret = gcry_cipher_encrypt(scc->recv->handle, (unsigned char *)buf, ret,
+       *dst = *src;
+       gret = gcry_cipher_encrypt(handle, src->iov_base, src->iov_len,
                NULL, 0);
        assert(gret == 0);
-       return ret;
 }