OSX/libsecurity_cryptkit/lib/ckSHA1.c

   1 /* Copyright (c) 1998,2011,2014 Apple Inc.  All Rights Reserved.
   2  *
   3  * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
   4  * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
   5  * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE
   6  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
   7  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
   8  * EXPOSE YOU TO LIABILITY.
   9  ***************************************************************************
  10  *
  11  * ckSHA1.c - generic, portable SHA-1 hash object
  12  *
  13  * Revision History
  14  * ----------------
  15  * 10/06/98             ap
  16  *      Changed to compile with C++.
  17  * 07 Jan 1998 at Apple
  18  *      Created.
  19  */
  20
  21 #include "ckconfig.h"
  22 #include "feeTypes.h"
  23 #include "ckSHA1.h"
  24
  25 /*
  26  * For linking with AppleCSP: use libSystem SHA1 implementation.
  27  */
  28 #include <CommonCrypto/CommonDigest.h>
  29 #include "falloc.h"
  30 #include "platform.h"
  31
  32 /*
  33  * Trivial wrapper for SHA_CTX; a sha1Obj is a pointer to this.
  34  */
  35 typedef struct {
  36         CC_SHA1_CTX             ctx;
  37         unsigned char   digest[CC_SHA1_DIGEST_LENGTH];
  38 } Sha1Obj;
  39
  40 sha1Obj sha1Alloc(void)
  41 {
  42         void *rtn = fmalloc(sizeof(Sha1Obj));
  43         memset(rtn, 0, sizeof(Sha1Obj));
  44         CC_SHA1_Init(&(((Sha1Obj *)rtn)->ctx));
  45         return (sha1Obj)rtn;
  46 }
  47
  48 void sha1Reinit(sha1Obj sha1)
  49 {
  50         Sha1Obj *ctx = (Sha1Obj *)sha1;
  51         CC_SHA1_Init(&ctx->ctx);
  52 }
  53
  54 void sha1Free(sha1Obj sha1)
  55 {
  56         memset(sha1, 0, sizeof(Sha1Obj));
  57         ffree(sha1);
  58 }
  59
  60 void sha1AddData(sha1Obj sha1,
  61         const unsigned char *data,
  62         unsigned dataLen)
  63 {
  64         Sha1Obj *ctx = (Sha1Obj *)sha1;
  65         CC_SHA1_Update(&ctx->ctx, data, dataLen);
  66 }
  67
  68 unsigned char *sha1Digest(sha1Obj sha1)
  69 {
  70         Sha1Obj *ctx = (Sha1Obj *)sha1;
  71         CC_SHA1_Final(ctx->digest, &ctx->ctx);
  72         return ctx->digest;
  73 }
  74
  75 unsigned sha1DigestLen(void)
  76 {
  77         return CC_SHA1_DIGEST_LENGTH;
  78 }
  79