SHA256.c 2.7 KB

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  1. /*
  2. * An implementation of the SHA-256 hash function.
  3. *
  4. * The Federal Information Processing Standards (FIPS) Specification
  5. * can be found here (FIPS 180-3):
  6. * http://csrc.nist.gov/publications/PubsFIPS.html
  7. *
  8. * Written in 2010 by Lorenz Quack <don@amberfisharts.com>
  9. *
  10. * ===================================================================
  11. * The contents of this file are dedicated to the public domain. To
  12. * the extent that dedication to the public domain is not available,
  13. * everyone is granted a worldwide, perpetual, royalty-free,
  14. * non-exclusive license to exercise all rights associated with the
  15. * contents of this file for any purpose whatsoever.
  16. * No rights are reserved.
  17. *
  18. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  22. * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  23. * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25. * SOFTWARE.
  26. * ===================================================================
  27. *
  28. */
  29. #define MODULE_NAME _SHA256
  30. #define DIGEST_SIZE (256/8)
  31. #define BLOCK_SIZE (512/8)
  32. #define WORD_SIZE 4
  33. #define SCHEDULE_SIZE 64
  34. #include "hash_SHA2.h"
  35. /* Initial Values H */
  36. static const sha2_word_t H[8] = {
  37. 0x6a09e667,
  38. 0xbb67ae85,
  39. 0x3c6ef372,
  40. 0xa54ff53a,
  41. 0x510e527f,
  42. 0x9b05688c,
  43. 0x1f83d9ab,
  44. 0x5be0cd19
  45. };
  46. /* the Constants K */
  47. static const sha2_word_t K[SCHEDULE_SIZE] = {
  48. 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b,
  49. 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01,
  50. 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7,
  51. 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
  52. 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152,
  53. 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
  54. 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc,
  55. 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
  56. 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
  57. 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08,
  58. 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f,
  59. 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
  60. 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
  61. };
  62. /* SHA-256 specific functions */
  63. #define Sigma0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
  64. #define Sigma1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
  65. #define Gamma0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
  66. #define Gamma1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
  67. #include "hash_SHA2_template.c"