X-Git-Url: https://pd.if.org/git/?p=zpackage;a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fpk%2Fkatja%2Fkatja_exptmod.c;fp=libtomcrypt%2Fsrc%2Fpk%2Fkatja%2Fkatja_exptmod.c;h=0000000000000000000000000000000000000000;hp=afc847f151a5115512313c067f538473c6b95b9f;hb=094fa8c1bc2e27a560833c6a829b1d9b60de7034;hpb=27410df6ded2d78850397c159cbccff1a78012f2

diff --git a/libtomcrypt/src/pk/katja/katja_exptmod.c b/libtomcrypt/src/pk/katja/katja_exptmod.c
deleted file mode 100644
index afc847f..0000000
--- a/libtomcrypt/src/pk/katja/katja_exptmod.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/* LibTomCrypt, modular cryptographic library -- Tom St Denis
- *
- * LibTomCrypt is a library that provides various cryptographic
- * algorithms in a highly modular and flexible manner.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- */
-#include "tomcrypt.h"
-
-/**
-  @file katja_exptmod.c
-  Katja PKCS-style exptmod, Tom St Denis
-*/
-
-#ifdef LTC_MKAT
-
-/**
-   Compute an RSA modular exponentiation
-   @param in         The input data to send into RSA
-   @param inlen      The length of the input (octets)
-   @param out        [out] The destination
-   @param outlen     [in/out] The max size and resulting size of the output
-   @param which      Which exponent to use, e.g. PK_PRIVATE or PK_PUBLIC
-   @param key        The RSA key to use
-   @return CRYPT_OK if successful
-*/
-int katja_exptmod(const unsigned char *in,   unsigned long inlen,
-                        unsigned char *out,  unsigned long *outlen, int which,
-                        katja_key *key)
-{
-   void         *tmp, *tmpa, *tmpb;
-   unsigned long x;
-   int           err;
-
-   LTC_ARGCHK(in     != NULL);
-   LTC_ARGCHK(out    != NULL);
-   LTC_ARGCHK(outlen != NULL);
-   LTC_ARGCHK(key    != NULL);
-
-   /* is the key of the right type for the operation? */
-   if (which == PK_PRIVATE && (key->type != PK_PRIVATE)) {
-      return CRYPT_PK_NOT_PRIVATE;
-   }
-
-   /* must be a private or public operation */
-   if (which != PK_PRIVATE && which != PK_PUBLIC) {
-      return CRYPT_PK_INVALID_TYPE;
-   }
-
-   /* init and copy into tmp */
-   if ((err = mp_init_multi(&tmp, &tmpa, &tmpb, NULL)) != CRYPT_OK)                                    { return err; }
-   if ((err = mp_read_unsigned_bin(tmp, (unsigned char *)in, (int)inlen)) != CRYPT_OK)                 { goto error; }
-
-   /* sanity check on the input */
-   if (mp_cmp(key->N, tmp) == LTC_MP_LT) {
-      err = CRYPT_PK_INVALID_SIZE;
-      goto done;
-   }
-
-   /* are we using the private exponent and is the key optimized? */
-   if (which == PK_PRIVATE) {
-      /* tmpa = tmp^dP mod p */
-      if ((err = mp_exptmod(tmp, key->dP, key->p, tmpa)) != CRYPT_OK)                               { goto error; }
-
-      /* tmpb = tmp^dQ mod q */
-      if ((err = mp_exptmod(tmp, key->dQ, key->q, tmpb)) != CRYPT_OK)                               { goto error; }
-
-      /* tmp = (tmpa - tmpb) * qInv (mod p) */
-      if ((err = mp_sub(tmpa, tmpb, tmp)) != CRYPT_OK)                                              { goto error; }
-      if ((err = mp_mulmod(tmp, key->qP, key->p, tmp)) != CRYPT_OK)                                 { goto error; }
-
-      /* tmp = tmpb + q * tmp */
-      if ((err = mp_mul(tmp, key->q, tmp)) != CRYPT_OK)                                             { goto error; }
-      if ((err = mp_add(tmp, tmpb, tmp)) != CRYPT_OK)                                               { goto error; }
-   } else {
-      /* exptmod it */
-      if ((err = mp_exptmod(tmp, key->N, key->N, tmp)) != CRYPT_OK)                                 { goto error; }
-   }
-
-   /* read it back */
-   x = (unsigned long)mp_unsigned_bin_size(key->N);
-   if (x > *outlen) {
-      *outlen = x;
-      err = CRYPT_BUFFER_OVERFLOW;
-      goto done;
-   }
-
-   /* this should never happen ... */
-   if (mp_unsigned_bin_size(tmp) > mp_unsigned_bin_size(key->N)) {
-      err = CRYPT_ERROR;
-      goto done;
-   }
-   *outlen = x;
-
-   /* convert it */
-   zeromem(out, x);
-   if ((err = mp_to_unsigned_bin(tmp, out+(x-mp_unsigned_bin_size(tmp)))) != CRYPT_OK)               { goto error; }
-
-   /* clean up and return */
-   err = CRYPT_OK;
-   goto done;
-error:
-done:
-   mp_clear_multi(tmp, tmpa, tmpb, NULL);
-   return err;
-}
-
-#endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */