Commit bc95eead authored by Dmitry Kasatkin's avatar Dmitry Kasatkin Committed by James Morris

lib/mpi: removed unused functions

do_encode_md() and mpi_get_keyid() are not parts of mpi library.
They were used early versions of gnupg and in digsig project,
but they are not used neither here nor there anymore.
Signed-off-by: default avatarDmitry Kasatkin <dmitry.kasatkin@intel.com>
Reviewed-by: default avatarTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent e2fe85c2
......@@ -20,72 +20,8 @@
#include "mpi-internal.h"
#define DIM(v) (sizeof(v)/sizeof((v)[0]))
#define MAX_EXTERN_MPI_BITS 16384
static uint8_t asn[15] = /* Object ID is 1.3.14.3.2.26 */
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
0x02, 0x1a, 0x05, 0x00, 0x04, 0x14
};
MPI do_encode_md(const void *sha_buffer, unsigned nbits)
{
int nframe = (nbits + 7) / 8;
uint8_t *frame, *fr_pt;
int i = 0, n;
size_t asnlen = DIM(asn);
MPI a = NULL;
if (SHA1_DIGEST_LENGTH + asnlen + 4 > nframe)
pr_info("MPI: can't encode a %d bit MD into a %d bits frame\n",
(int)(SHA1_DIGEST_LENGTH * 8), (int)nbits);
/* We encode the MD in this way:
*
* 0 A PAD(n bytes) 0 ASN(asnlen bytes) MD(len bytes)
*
* PAD consists of FF bytes.
*/
frame = kmalloc(nframe, GFP_KERNEL);
if (!frame)
return NULL;
n = 0;
frame[n++] = 0;
frame[n++] = 1; /* block type */
i = nframe - SHA1_DIGEST_LENGTH - asnlen - 3;
if (i <= 1) {
pr_info("MPI: message digest encoding failed\n");
kfree(frame);
return a;
}
memset(frame + n, 0xff, i);
n += i;
frame[n++] = 0;
memcpy(frame + n, &asn, asnlen);
n += asnlen;
memcpy(frame + n, sha_buffer, SHA1_DIGEST_LENGTH);
n += SHA1_DIGEST_LENGTH;
i = nframe;
fr_pt = frame;
if (n != nframe) {
printk
("MPI: message digest encoding failed, frame length is wrong\n");
kfree(frame);
return a;
}
a = mpi_alloc((nframe + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB);
if (a)
mpi_set_buffer(a, frame, nframe, 0);
kfree(frame);
return a;
}
MPI mpi_read_from_buffer(const void *xbuffer, unsigned *ret_nread)
{
const uint8_t *buffer = xbuffer;
......@@ -212,30 +148,6 @@ int mpi_fromstr(MPI val, const char *str)
}
EXPORT_SYMBOL_GPL(mpi_fromstr);
/****************
* Special function to get the low 8 bytes from an mpi.
* This can be used as a keyid; KEYID is an 2 element array.
* Return the low 4 bytes.
*/
u32 mpi_get_keyid(const MPI a, u32 *keyid)
{
#if BYTES_PER_MPI_LIMB == 4
if (keyid) {
keyid[0] = a->nlimbs >= 2 ? a->d[1] : 0;
keyid[1] = a->nlimbs >= 1 ? a->d[0] : 0;
}
return a->nlimbs >= 1 ? a->d[0] : 0;
#elif BYTES_PER_MPI_LIMB == 8
if (keyid) {
keyid[0] = a->nlimbs ? (u32) (a->d[0] >> 32) : 0;
keyid[1] = a->nlimbs ? (u32) (a->d[0] & 0xffffffff) : 0;
}
return a->nlimbs ? (u32) (a->d[0] & 0xffffffff) : 0;
#else
#error Make this function work with other LIMB sizes
#endif
}
/****************
* Return an allocated buffer with the MPI (msb first).
* NBYTES receives the length of this buffer. Caller must free the
......
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