libkern/crypto/corecrypto_sha2.c

   1 /*
   2  * Copyright (c) 2012 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <libkern/crypto/crypto_internal.h>
  30 #include <libkern/crypto/sha2.h>
  31 #include <libkern/libkern.h>
  32 #include <kern/debug.h>
  33 #include <corecrypto/ccdigest.h>
  34
  35 #if defined(CRYPTO_SHA2)
  36
  37 void SHA256_Init(SHA256_CTX *ctx)
  38 {
  39         const struct ccdigest_info *di;
  40         di=g_crypto_funcs->ccsha256_di;
  41
  42         /* Make sure the context size for the digest info fits in the one we have */
  43         if(ccdigest_di_size(di)>sizeof(SHA256_CTX))
  44                 panic("%s: inconsistent size for SHA256 context", __FUNCTION__);
  45
  46         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
  47 }
  48
  49 void SHA256_Update(SHA256_CTX *ctx, const void *data, size_t len)
  50 {
  51         const struct ccdigest_info *di;
  52         di=g_crypto_funcs->ccsha256_di;
  53
  54         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
  55 }
  56
  57 void SHA256_Final(void *digest, SHA256_CTX *ctx)
  58 {
  59         const struct ccdigest_info *di;
  60         di=g_crypto_funcs->ccsha256_di;
  61
  62         ccdigest_final(di, ctx->ctx, digest);
  63 }
  64
  65 void SHA384_Init(SHA384_CTX *ctx)
  66 {
  67         const struct ccdigest_info *di;
  68         di=g_crypto_funcs->ccsha384_di;
  69
  70         /* Make sure the context size for the digest info fits in the one we have */
  71         if(ccdigest_di_size(di)>sizeof(SHA384_CTX))
  72                 panic("%s: inconsistent size for SHA384 context", __FUNCTION__);
  73
  74         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
  75 }
  76
  77 void SHA384_Update(SHA384_CTX *ctx, const void *data, size_t len)
  78 {
  79         const struct ccdigest_info *di;
  80         di=g_crypto_funcs->ccsha384_di;
  81
  82         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
  83 }
  84
  85
  86 void SHA384_Final(void *digest, SHA384_CTX *ctx)
  87 {
  88         const struct ccdigest_info *di;
  89         di=g_crypto_funcs->ccsha384_di;
  90
  91         ccdigest_final(di, ctx->ctx, digest);
  92 }
  93
  94 void SHA512_Init(SHA512_CTX *ctx)
  95 {
  96         const struct ccdigest_info *di;
  97         di=g_crypto_funcs->ccsha512_di;
  98
  99         /* Make sure the context size for the digest info fits in the one we have */
 100         if(ccdigest_di_size(di)>sizeof(SHA512_CTX))
 101                 panic("%s: inconsistent size for SHA512 context", __FUNCTION__);
 102
 103         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
 104 }
 105
 106 void SHA512_Update(SHA512_CTX *ctx, const void *data, size_t len)
 107 {
 108         const struct ccdigest_info *di;
 109         di=g_crypto_funcs->ccsha512_di;
 110
 111         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
 112 }
 113
 114 void SHA512_Final(void *digest, SHA512_CTX *ctx)
 115 {
 116         const struct ccdigest_info *di;
 117         di=g_crypto_funcs->ccsha512_di;
 118
 119         ccdigest_final(di, ctx->ctx, digest);
 120 }
 121
 122 #else
 123
 124 /* As these are part of the KPI, we need to stub them out for any kernel configuration that does not support SHA2. */
 125
 126 void UNSUPPORTED_API(SHA256_Init,   SHA256_CTX *ctx);
 127 void UNSUPPORTED_API(SHA384_Init,   SHA384_CTX *ctx);
 128 void UNSUPPORTED_API(SHA512_Init,   SHA512_CTX *ctx);
 129 void UNSUPPORTED_API(SHA256_Update, SHA256_CTX *ctx, const void *data, size_t len);
 130 void UNSUPPORTED_API(SHA384_Update, SHA384_CTX *ctx, const void *data, size_t len);
 131 void UNSUPPORTED_API(SHA512_Update, SHA512_CTX *ctx, const void *data, size_t len);
 132 void UNSUPPORTED_API(SHA256_Final,  void *digest, SHA256_CTX *ctx);
 133 void UNSUPPORTED_API(SHA384_Final,  void *digest, SHA384_CTX *ctx);
 134 void UNSUPPORTED_API(SHA512_Final,  void *digest, SHA512_CTX *ctx);
 135
 136 #endif
 137