Merge tag 'tty-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

[mv-sheeva.git] / lib / mpi / mpicoder.c

diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index fe84bb978e3b5c42befda57c206edd0b68d61684..f26b41fcb48c694c06fdcea18b55bdfd3788fb6d 100644 (file)
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -20,78 +20,15 @@
 
 #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 = MPI_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 MPI_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);
-       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;
        int i, j;
        unsigned nbits, nbytes, nlimbs, nread = 0;
        mpi_limb_t a;
-       MPI val = MPI_NULL;
+       MPI val = NULL;
 
        if (*ret_nread < 2)
                goto leave;
@@ -108,7 +45,7 @@ MPI mpi_read_from_buffer(const void *xbuffer, unsigned *ret_nread)
        nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
        val = mpi_alloc(nlimbs);
        if (!val)
-               return MPI_NULL;
+               return NULL;
        i = BYTES_PER_MPI_LIMB - nbytes % BYTES_PER_MPI_LIMB;
        i %= BYTES_PER_MPI_LIMB;
        val->nbits = nbits;
@@ -211,30 +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
@@ -255,6 +168,8 @@ void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign)
        if (!n)
                n++;            /* avoid zero length allocation */
        p = buffer = kmalloc(n, GFP_KERNEL);
+       if (!p)
+               return NULL;
 
        for (i = a->nlimbs - 1; i >= 0; i--) {
                alimb = a->d[i];