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sha224.c 2.3KB

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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-224 algorithm
  27. *
  28. */
  29. #include <stdint.h>
  30. #include <byteswap.h>
  31. #include <ipxe/crypto.h>
  32. #include <ipxe/asn1.h>
  33. #include <ipxe/sha256.h>
  34. /** SHA-224 initial digest values */
  35. static const struct sha256_digest sha224_init_digest = {
  36. .h = {
  37. cpu_to_be32 ( 0xc1059ed8 ),
  38. cpu_to_be32 ( 0x367cd507 ),
  39. cpu_to_be32 ( 0x3070dd17 ),
  40. cpu_to_be32 ( 0xf70e5939 ),
  41. cpu_to_be32 ( 0xffc00b31 ),
  42. cpu_to_be32 ( 0x68581511 ),
  43. cpu_to_be32 ( 0x64f98fa7 ),
  44. cpu_to_be32 ( 0xbefa4fa4 ),
  45. },
  46. };
  47. /**
  48. * Initialise SHA-224 algorithm
  49. *
  50. * @v ctx SHA-224 context
  51. */
  52. static void sha224_init ( void *ctx ) {
  53. struct sha256_context *context = ctx;
  54. sha256_family_init ( context, &sha224_init_digest, SHA224_DIGEST_SIZE );
  55. }
  56. /** SHA-224 algorithm */
  57. struct digest_algorithm sha224_algorithm = {
  58. .name = "sha224",
  59. .ctxsize = sizeof ( struct sha256_context ),
  60. .blocksize = sizeof ( union sha256_block ),
  61. .digestsize = SHA224_DIGEST_SIZE,
  62. .init = sha224_init,
  63. .update = sha256_update,
  64. .final = sha256_final,
  65. };
  66. /** "sha224" object identifier */
  67. static uint8_t oid_sha224[] = { ASN1_OID_SHA224 };
  68. /** "sha224" OID-identified algorithm */
  69. struct asn1_algorithm oid_sha224_algorithm __asn1_algorithm = {
  70. .name = "sha224",
  71. .digest = &sha224_algorithm,
  72. .oid = ASN1_OID_CURSOR ( oid_sha224 ),
  73. };