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
  38 SHA256_Init(SHA256_CTX *ctx)
  39 {
  40         const struct ccdigest_info *di;
  41         di = g_crypto_funcs->ccsha256_di;
  42
  43         /* Make sure the context size for the digest info fits in the one we have */
  44         if (ccdigest_di_size(di) > sizeof(SHA256_CTX)) {
  45                 panic("%s: inconsistent size for SHA256 context", __FUNCTION__);
  46         }
  47
  48         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
  49 }
  50
  51 void
  52 SHA256_Update(SHA256_CTX *ctx, const void *data, size_t len)
  53 {
  54         const struct ccdigest_info *di;
  55         di = g_crypto_funcs->ccsha256_di;
  56
  57         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
  58 }
  59
  60 void
  61 SHA256_Final(void *digest, SHA256_CTX *ctx)
  62 {
  63         const struct ccdigest_info *di;
  64         di = g_crypto_funcs->ccsha256_di;
  65
  66         ccdigest_final(di, ctx->ctx, digest);
  67 }
  68
  69 void
  70 SHA384_Init(SHA384_CTX *ctx)
  71 {
  72         const struct ccdigest_info *di;
  73         di = g_crypto_funcs->ccsha384_di;
  74
  75         /* Make sure the context size for the digest info fits in the one we have */
  76         if (ccdigest_di_size(di) > sizeof(SHA384_CTX)) {
  77                 panic("%s: inconsistent size for SHA384 context", __FUNCTION__);
  78         }
  79
  80         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
  81 }
  82
  83 void
  84 SHA384_Update(SHA384_CTX *ctx, const void *data, size_t len)
  85 {
  86         const struct ccdigest_info *di;
  87         di = g_crypto_funcs->ccsha384_di;
  88
  89         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
  90 }
  91
  92
  93 void
  94 SHA384_Final(void *digest, SHA384_CTX *ctx)
  95 {
  96         const struct ccdigest_info *di;
  97         di = g_crypto_funcs->ccsha384_di;
  98
  99         ccdigest_final(di, ctx->ctx, digest);
 100 }
 101
 102 void
 103 SHA512_Init(SHA512_CTX *ctx)
 104 {
 105         const struct ccdigest_info *di;
 106         di = g_crypto_funcs->ccsha512_di;
 107
 108         /* Make sure the context size for the digest info fits in the one we have */
 109         if (ccdigest_di_size(di) > sizeof(SHA512_CTX)) {
 110                 panic("%s: inconsistent size for SHA512 context", __FUNCTION__);
 111         }
 112
 113         g_crypto_funcs->ccdigest_init_fn(di, ctx->ctx);
 114 }
 115
 116 void
 117 SHA512_Update(SHA512_CTX *ctx, const void *data, size_t len)
 118 {
 119         const struct ccdigest_info *di;
 120         di = g_crypto_funcs->ccsha512_di;
 121
 122         g_crypto_funcs->ccdigest_update_fn(di, ctx->ctx, len, data);
 123 }
 124
 125 void
 126 SHA512_Final(void *digest, SHA512_CTX *ctx)
 127 {
 128         const struct ccdigest_info *di;
 129         di = g_crypto_funcs->ccsha512_di;
 130
 131         ccdigest_final(di, ctx->ctx, digest);
 132 }
 133
 134 #else
 135
 136 /* As these are part of the KPI, we need to stub them out for any kernel configuration that does not support SHA2. */
 137
 138 void UNSUPPORTED_API(SHA256_Init, SHA256_CTX *ctx);
 139 void UNSUPPORTED_API(SHA384_Init, SHA384_CTX *ctx);
 140 void UNSUPPORTED_API(SHA512_Init, SHA512_CTX *ctx);
 141 void UNSUPPORTED_API(SHA256_Update, SHA256_CTX *ctx, const void *data, size_t len);
 142 void UNSUPPORTED_API(SHA384_Update, SHA384_CTX *ctx, const void *data, size_t len);
 143 void UNSUPPORTED_API(SHA512_Update, SHA512_CTX *ctx, const void *data, size_t len);
 144 void UNSUPPORTED_API(SHA256_Final, void *digest, SHA256_CTX *ctx);
 145 void UNSUPPORTED_API(SHA384_Final, void *digest, SHA384_CTX *ctx);
 146 void UNSUPPORTED_API(SHA512_Final, void *digest, SHA512_CTX *ctx);
 147
 148 #endif