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bigint.h 3.8 KB

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  1. /*
  2. * Copyright (c) 2007, Cameron Rich
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions are met:
  8. *
  9. * * Redistributions of source code must retain the above copyright notice,
  10. * this list of conditions and the following disclaimer.
  11. * * Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. * * Neither the name of the axTLS project nor the names of its contributors
  15. * may be used to endorse or promote products derived from this software
  16. * 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 OWNER OR
  22. * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23. * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  24. * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25. * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26. * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27. * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29. */
  30. #ifndef BIGINT_HEADER
  31. #define BIGINT_HEADER
  32. #include "crypto.h"
  33. BI_CTX *bi_initialize(void);
  34. void bi_terminate(BI_CTX *ctx);
  35. void bi_permanent(bigint *bi);
  36. void bi_depermanent(bigint *bi);
  37. void bi_clear_cache(BI_CTX *ctx);
  38. void bi_free(BI_CTX *ctx, bigint *bi);
  39. bigint *bi_copy(bigint *bi);
  40. bigint *bi_clone(BI_CTX *ctx, const bigint *bi);
  41. void bi_export(BI_CTX *ctx, bigint *bi, uint8_t *data, int size);
  42. bigint *bi_import(BI_CTX *ctx, const uint8_t *data, int len);
  43. bigint *int_to_bi(BI_CTX *ctx, comp i);
  44. /* the functions that actually do something interesting */
  45. bigint *bi_add(BI_CTX *ctx, bigint *bia, bigint *bib);
  46. bigint *bi_subtract(BI_CTX *ctx, bigint *bia,
  47. bigint *bib, int *is_negative);
  48. bigint *bi_divide(BI_CTX *ctx, bigint *bia, bigint *bim, int is_mod);
  49. bigint *bi_multiply(BI_CTX *ctx, bigint *bia, bigint *bib);
  50. bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp);
  51. bigint *bi_mod_power2(BI_CTX *ctx, bigint *bi, bigint *bim, bigint *biexp);
  52. int bi_compare(bigint *bia, bigint *bib);
  53. void bi_set_mod(BI_CTX *ctx, bigint *bim, int mod_offset);
  54. void bi_free_mod(BI_CTX *ctx, int mod_offset);
  55. #ifdef CONFIG_SSL_FULL_MODE
  56. void bi_print(const char *label, bigint *bi);
  57. bigint *bi_str_import(BI_CTX *ctx, const char *data);
  58. #endif
  59. /**
  60. * @def bi_mod
  61. * Find the residue of B. bi_set_mod() must be called before hand.
  62. */
  63. #define bi_mod(A, B) bi_divide(A, B, ctx->bi_mod[ctx->mod_offset], 1)
  64. /**
  65. * bi_residue() is technically the same as bi_mod(), but it uses the
  66. * appropriate reduction technique (which is bi_mod() when doing classical
  67. * reduction).
  68. */
  69. #if defined(CONFIG_BIGINT_MONTGOMERY)
  70. #define bi_residue(A, B) bi_mont(A, B)
  71. bigint *bi_mont(BI_CTX *ctx, bigint *bixy);
  72. #elif defined(CONFIG_BIGINT_BARRETT)
  73. #define bi_residue(A, B) bi_barrett(A, B)
  74. bigint *bi_barrett(BI_CTX *ctx, bigint *bi);
  75. #else /* if defined(CONFIG_BIGINT_CLASSICAL) */
  76. #define bi_residue(A, B) bi_mod(A, B)
  77. #endif
  78. #ifdef CONFIG_BIGINT_SQUARE
  79. bigint *bi_square(BI_CTX *ctx, bigint *bi);
  80. #else
  81. #define bi_square(A, B) bi_multiply(A, bi_copy(B), B)
  82. #endif
  83. #ifdef CONFIG_BIGINT_CRT
  84. bigint *bi_crt(BI_CTX *ctx, bigint *bi,
  85. bigint *dP, bigint *dQ,
  86. bigint *p, bigint *q,
  87. bigint *qInv);
  88. #endif
  89. #endif