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  1. /*
  2. * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
  3. *
  4. * This program is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU General Public License as
  6. * published by the Free Software Foundation; either version 2 of the
  7. * License, or any later version.
  8. *
  9. * This program is distributed in the hope that it will be useful, but
  10. * WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write to the Free Software
  16. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17. * 02110-1301, USA.
  18. *
  19. * You can also choose to distribute this program under the terms of
  20. * the Unmodified Binary Distribution Licence (as given in the file
  21. * COPYING.UBDL), provided that you have satisfied its requirements.
  22. */
  23. FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  24. /** @file
  25. *
  26. * SHA-512/256 algorithm
  27. *
  28. */
  29. #include <stdint.h>
  30. #include <byteswap.h>
  31. #include <ipxe/crypto.h>
  32. #include <ipxe/asn1.h>
  33. #include <ipxe/sha512.h>
  34. /** SHA-512/256 initial digest values */
  35. static const struct sha512_digest sha512_256_init_digest = {
  36. .h = {
  37. cpu_to_be64 ( 0x22312194fc2bf72cULL ),
  38. cpu_to_be64 ( 0x9f555fa3c84c64c2ULL ),
  39. cpu_to_be64 ( 0x2393b86b6f53b151ULL ),
  40. cpu_to_be64 ( 0x963877195940eabdULL ),
  41. cpu_to_be64 ( 0x96283ee2a88effe3ULL ),
  42. cpu_to_be64 ( 0xbe5e1e2553863992ULL ),
  43. cpu_to_be64 ( 0x2b0199fc2c85b8aaULL ),
  44. cpu_to_be64 ( 0x0eb72ddc81c52ca2ULL ),
  45. },
  46. };
  47. /**
  48. * Initialise SHA-512/256 algorithm
  49. *
  50. * @v ctx SHA-512/256 context
  51. */
  52. static void sha512_256_init ( void *ctx ) {
  53. struct sha512_context *context = ctx;
  54. sha512_family_init ( context, &sha512_256_init_digest,
  55. SHA512_256_DIGEST_SIZE );
  56. }
  57. /** SHA-512/256 algorithm */
  58. struct digest_algorithm sha512_256_algorithm = {
  59. .name = "sha512/256",
  60. .ctxsize = sizeof ( struct sha512_context ),
  61. .blocksize = sizeof ( union sha512_block ),
  62. .digestsize = SHA512_256_DIGEST_SIZE,
  63. .init = sha512_256_init,
  64. .update = sha512_update,
  65. .final = sha512_final,
  66. };
  67. /** "sha512_256" object identifier */
  68. static uint8_t oid_sha512_256[] = { ASN1_OID_SHA512_256 };
  69. /** "sha512_256" OID-identified algorithm */
  70. struct asn1_algorithm oid_sha512_256_algorithm __asn1_algorithm = {
  71. .name = "sha512/256",
  72. .digest = &sha512_256_algorithm,
  73. .oid = ASN1_OID_CURSOR ( oid_sha512_256 ),
  74. };