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crypto: fix build with nettle >= 3.0.0 

In nettle 3, cbc_encrypt() accepts 'nettle_cipher_func' instead of
'nettle_crypt_func' and these two differ in 'const' qualifier of the
first argument.  The build fails with:

  In file included from crypto/cipher.c:71:0:
  ./crypto/cipher-nettle.c: In function ‘qcrypto_cipher_encrypt’:
  ./crypto/cipher-nettle.c:154:38: error: passing argument 2 of
  ‘nettle_cbc_encrypt’ from incompatible pointer type
           cbc_encrypt(ctx->ctx_encrypt, ctx->alg_encrypt,
                                               ^
  In file included from ./crypto/cipher-nettle.c:24:0,
                   from crypto/cipher.c:71:
  /usr/include/nettle/cbc.h:48:1: note: expected
  ‘void (*)(const void *, size_t, uint8_t *, const uint8_t *)
  but argument is of type
  ‘void (*)(      void *, size_t, uint8_t *, const uint8_t *)

To allow both versions, we switch to the new definition and #if typedef
it for old versions.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Message-Id: <1436548682-9315-2-git-send-email-rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář 2015-07-10 19:18:00 +02:00 committed by Paolo Bonzini
parent c6742b14fe
commit becaeb726a
2 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
configure vendored
View File

@ -2183,6 +2183,7 @@ if test "$gnutls_nettle" != "no"; then
if $pkg_config --exists "nettle"; then
nettle_cflags=`$pkg_config --cflags nettle`
nettle_libs=`$pkg_config --libs nettle`
nettle_version=`$pkg_config --modversion nettle`
libs_softmmu="$nettle_libs $libs_softmmu"
libs_tools="$nettle_libs $libs_tools"
QEMU_CFLAGS="$QEMU_CFLAGS $nettle_cflags"
@ -4490,7 +4491,7 @@ echo "GTK support $gtk"
echo "GNUTLS support $gnutls"
echo "GNUTLS hash $gnutls_hash"
echo "GNUTLS gcrypt $gnutls_gcrypt"
echo "GNUTLS nettle $gnutls_nettle"
echo "GNUTLS nettle $gnutls_nettle ${gnutls_nettle+($nettle_version)}"
echo "VTE support $vte"
echo "curses support $curses"
echo "curl support $curl"
@ -4858,6 +4859,7 @@ if test "$gnutls_gcrypt" = "yes" ; then
fi
if test "$gnutls_nettle" = "yes" ; then
echo "CONFIG_GNUTLS_NETTLE=y" >> $config_host_mak
echo "CONFIG_NETTLE_VERSION_MAJOR=${nettle_version%%.*}" >> $config_host_mak
fi
if test "$vte" = "yes" ; then
echo "CONFIG_VTE=y" >> $config_host_mak

16
crypto/cipher-nettle.c
View File

@ -23,12 +23,16 @@
#include <nettle/des.h>
#include <nettle/cbc.h>
#if CONFIG_NETTLE_VERSION_MAJOR < 3
typedef nettle_crypt_func nettle_cipher_func;
#endif
typedef struct QCryptoCipherNettle QCryptoCipherNettle;
struct QCryptoCipherNettle {
void *ctx_encrypt;
void *ctx_decrypt;
nettle_crypt_func *alg_encrypt;
nettle_crypt_func *alg_decrypt;
nettle_cipher_func *alg_encrypt;
nettle_cipher_func *alg_decrypt;
uint8_t *iv;
size_t niv;
};
@ -83,8 +87,8 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
des_set_key(ctx->ctx_encrypt, rfbkey);
g_free(rfbkey);
ctx->alg_encrypt = (nettle_crypt_func *)des_encrypt;
ctx->alg_decrypt = (nettle_crypt_func *)des_decrypt;
ctx->alg_encrypt = (nettle_cipher_func *)des_encrypt;
ctx->alg_decrypt = (nettle_cipher_func *)des_decrypt;
ctx->niv = DES_BLOCK_SIZE;
break;
@ -98,8 +102,8 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
aes_set_encrypt_key(ctx->ctx_encrypt, nkey, key);
aes_set_decrypt_key(ctx->ctx_decrypt, nkey, key);
ctx->alg_encrypt = (nettle_crypt_func *)aes_encrypt;
ctx->alg_decrypt = (nettle_crypt_func *)aes_decrypt;
ctx->alg_encrypt = (nettle_cipher_func *)aes_encrypt;
ctx->alg_decrypt = (nettle_cipher_func *)aes_decrypt;
ctx->niv = AES_BLOCK_SIZE;
break;