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crypto: add a gcrypt cipher implementation

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If we are linking to gnutls already and gnutls is built against
gcrypt, then we should use gcrypt as a cipher backend in
preference to our built-in backend.

This will be used when linking against GNUTLS 1.x and many
GNUTLS 2.x versions.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1435770638-25715-6-git-send-email-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Daniel P. Berrange 2015-07-01 18:10:33 +01:00 • committed by Paolo Bonzini
parent ca38a4cc9e
commit 62893b67cd
4 changed files with 337 additions and 0 deletions
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23
crypto/cipher.c
View file

@ -20,6 +20,7 @@
#include "crypto/cipher.h"
static size_t alg_key_len[QCRYPTO_CIPHER_ALG_LAST] = {
[QCRYPTO_CIPHER_ALG_AES_128] = 16,
[QCRYPTO_CIPHER_ALG_AES_192] = 24,
@ -46,4 +47,26 @@ qcrypto_cipher_validate_key_length(QCryptoCipherAlgorithm alg,
return true;
}
#if defined(CONFIG_GNUTLS_GCRYPT)
static uint8_t *
qcrypto_cipher_munge_des_rfb_key(const uint8_t *key,
size_t nkey)
{
uint8_t *ret = g_new0(uint8_t, nkey);
size_t i;
for (i = 0; i < nkey; i++) {
uint8_t r = key[i];
r = (r & 0xf0) >> 4 | (r & 0x0f) << 4;
r = (r & 0xcc) >> 2 | (r & 0x33) << 2;
r = (r & 0xaa) >> 1 | (r & 0x55) << 1;
ret[i] = r;
}
return ret;
}
#endif /* CONFIG_GNUTLS_GCRYPT */
#ifdef CONFIG_GNUTLS_GCRYPT
#include "crypto/cipher-gcrypt.c"
#else
#include "crypto/cipher-builtin.c"
#endif