sgx_sha256.cpp 4.9 KB

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  1. /*
  2. * Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
  3. *
  4. * Redistribution and use in source and binary forms, with or without
  5. * modification, are permitted provided that the following conditions
  6. * are met:
  7. *
  8. * * Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * * Redistributions in binary form must reproduce the above copyright
  11. * notice, this list of conditions and the following disclaimer in
  12. * the documentation and/or other materials provided with the
  13. * distribution.
  14. * * Neither the name of Intel Corporation nor the names of its
  15. * contributors may be used to endorse or promote products derived
  16. * from this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29. *
  30. */
  31. #include "sgx_tcrypto.h"
  32. #include "ippcp.h"
  33. #include "stdlib.h"
  34. #ifndef SAFE_FREE
  35. #define SAFE_FREE(ptr) {if (NULL != (ptr)) {free(ptr); (ptr)=NULL;}}
  36. #endif
  37. /* Allocates and initializes sha256 state
  38. * Parameters:
  39. * Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.h
  40. * Output: sgx_sha_state_handle_t *p_sha_handle - Pointer to the handle of the SHA256 state */
  41. sgx_status_t sgx_sha256_init(sgx_sha_state_handle_t* p_sha_handle)
  42. {
  43. IppStatus ipp_ret = ippStsNoErr;
  44. IppsHashState* p_temp_state = NULL;
  45. if (p_sha_handle == NULL)
  46. return SGX_ERROR_INVALID_PARAMETER;
  47. int ctx_size = 0;
  48. ipp_ret = ippsHashGetSize(&ctx_size);
  49. if (ipp_ret != ippStsNoErr)
  50. return SGX_ERROR_UNEXPECTED;
  51. p_temp_state = (IppsHashState*)(malloc(ctx_size));
  52. if (p_temp_state == NULL)
  53. return SGX_ERROR_OUT_OF_MEMORY;
  54. ipp_ret = ippsHashInit(p_temp_state, IPP_ALG_HASH_SHA256);
  55. if (ipp_ret != ippStsNoErr)
  56. {
  57. SAFE_FREE(p_temp_state);
  58. *p_sha_handle = NULL;
  59. switch (ipp_ret)
  60. {
  61. case ippStsNullPtrErr:
  62. case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
  63. default: return SGX_ERROR_UNEXPECTED;
  64. }
  65. }
  66. *p_sha_handle = p_temp_state;
  67. return SGX_SUCCESS;
  68. }
  69. /* Updates sha256 has calculation based on the input message
  70. * Parameters:
  71. * Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.
  72. * Input: sgx_sha_state_handle_t sha_handle - Handle to the SHA256 state
  73. * uint8_t *p_src - Pointer to the input stream to be hashed
  74. * uint32_t src_len - Length of the input stream to be hashed */
  75. sgx_status_t sgx_sha256_update(const uint8_t *p_src, uint32_t src_len, sgx_sha_state_handle_t sha_handle)
  76. {
  77. if ((p_src == NULL) || (sha_handle == NULL))
  78. {
  79. return SGX_ERROR_INVALID_PARAMETER;
  80. }
  81. IppStatus ipp_ret = ippStsNoErr;
  82. ipp_ret = ippsHashUpdate(p_src, src_len, (IppsHashState*)sha_handle);
  83. switch (ipp_ret)
  84. {
  85. case ippStsNoErr: return SGX_SUCCESS;
  86. case ippStsNullPtrErr:
  87. case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
  88. default: return SGX_ERROR_UNEXPECTED;
  89. }
  90. }
  91. /* Returns Hash calculation
  92. * Parameters:
  93. * Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.h
  94. * Input: sgx_sha_state_handle_t sha_handle - Handle to the SHA256 state
  95. * Output: sgx_sha256_hash_t *p_hash - Resultant hash from operation */
  96. sgx_status_t sgx_sha256_get_hash(sgx_sha_state_handle_t sha_handle, sgx_sha256_hash_t *p_hash)
  97. {
  98. if ((sha_handle == NULL) || (p_hash == NULL))
  99. {
  100. return SGX_ERROR_INVALID_PARAMETER;
  101. }
  102. IppStatus ipp_ret = ippStsNoErr;
  103. ipp_ret = ippsHashGetTag((Ipp8u*)p_hash, SGX_SHA256_HASH_SIZE, (IppsHashState*)sha_handle);
  104. switch (ipp_ret)
  105. {
  106. case ippStsNoErr: return SGX_SUCCESS;
  107. case ippStsNullPtrErr:
  108. case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
  109. default: return SGX_ERROR_UNEXPECTED;
  110. }
  111. }
  112. /* Cleans up sha state
  113. * Parameters:
  114. * Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.h
  115. * Input: sgx_sha_state_handle_t sha_handle - Handle to the SHA256 state */
  116. sgx_status_t sgx_sha256_close(sgx_sha_state_handle_t sha_handle)
  117. {
  118. if (sha_handle == NULL)
  119. {
  120. return SGX_ERROR_INVALID_PARAMETER;
  121. }
  122. SAFE_FREE(sha_handle);
  123. return SGX_SUCCESS;
  124. }