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      1 /* rsa.h
      2 **
      3 ** Copyright 2008, The Android Open Source Project
      4 **
      5 ** Redistribution and use in source and binary forms, with or without
      6 ** modification, are permitted provided that the following conditions are met:
      7 **     * Redistributions of source code must retain the above copyright
      8 **       notice, this list of conditions and the following disclaimer.
      9 **     * Redistributions in binary form must reproduce the above copyright
     10 **       notice, this list of conditions and the following disclaimer in the
     11 **       documentation and/or other materials provided with the distribution.
     12 **     * Neither the name of Google Inc. nor the names of its contributors may
     13 **       be used to endorse or promote products derived from this software
     14 **       without specific prior written permission.
     15 **
     16 ** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
     17 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18 ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19 ** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21 ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22 ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24 ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25 ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26 */
     27 
     28 #ifndef _EMBEDDED_RSA_H_
     29 #define _EMBEDDED_RSA_H_
     30 
     31 #include <inttypes.h>
     32 
     33 #ifdef __cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 #define RSANUMBYTES 256           /* 2048 bit key length */
     38 #define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t))
     39 
     40 typedef struct RSAPublicKey {
     41     int len;                  /* Length of n[] in number of uint32_t */
     42     uint32_t n0inv;           /* -1 / n[0] mod 2^32 */
     43     uint32_t n[RSANUMWORDS];  /* modulus as little endian array */
     44     uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */
     45     int exponent;             /* 3 or 65537 */
     46 } RSAPublicKey;
     47 
     48 int RSA_verify(const RSAPublicKey *key,
     49                const uint8_t* signature,
     50                const int len,
     51                const uint8_t* sha);
     52 
     53 #ifdef __cplusplus
     54 }
     55 #endif
     56 
     57 #endif
     58