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AddressCalc.h 2.0 KB

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  1. /* vim: set expandtab ts=4 sw=4: */
  2. /*
  3. * You may redistribute this program and/or modify it under the terms of
  4. * the GNU General Public License as published by the Free Software Foundation,
  5. * either version 3 of the License, or (at your option) any later version.
  6. *
  7. * This program is distributed in the hope that it will be useful,
  8. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  10. * GNU General Public License for more details.
  11. *
  12. * You should have received a copy of the GNU General Public License
  13. * along with this program. If not, see <https://www.gnu.org/licenses/>.
  14. */
  15. #ifndef AddressCalc_H
  16. #define AddressCalc_H
  17. #include "util/Linker.h"
  18. Linker_require("crypto/AddressCalc.c")
  19. #include <stdint.h>
  20. #include <stdbool.h>
  21. #ifdef ADDRESS_PREFIX
  22. #define AddressCalc_ADDRESS_PREFIX ADDRESS_PREFIX
  23. #else
  24. #define AddressCalc_ADDRESS_PREFIX 0xfc
  25. #endif
  26. #ifdef ADDRESS_PREFIX_BITS
  27. #define AddressCalc_ADDRESS_PREFIX_BITS ADDRESS_PREFIX_BITS
  28. #else
  29. #define AddressCalc_ADDRESS_PREFIX_BITS 8
  30. #endif
  31. #if AddressCalc_ADDRESS_PREFIX_BITS > 64
  32. #error "ADDRESS_PREFIX_BITS may not be > 64."
  33. #endif
  34. #if AddressCalc_ADDRESS_PREFIX_BITS <= 0
  35. #error "ADDRESS_PREFIX_BITS may not be <= 0."
  36. #endif
  37. #if AddressCalc_ADDRESS_PREFIX >= (1 << AddressCalc_ADDRESS_PREFIX_BITS)
  38. #error "ADDRESS_PREFIX may not be >= 2^ADDRESS_PREFIX_BITS."
  39. #endif
  40. /**
  41. * Check if an address is valid given the IPv6
  42. *
  43. * @return true if the IPv6 is a valid cjdns address.
  44. */
  45. bool AddressCalc_validAddress(const uint8_t address[16]);
  46. /**
  47. * Edits the prefix of the given address to make it a valid cjdns address.
  48. */
  49. void AddressCalc_makeValidAddress(uint8_t address[16]);
  50. /**
  51. * Calculate a cjdns IPv6 address for a public key.
  52. *
  53. * @param addressOut put the address here.
  54. * @param key the 256 bit curve25519 public key.
  55. * @return true if the IPv6 is a valid cjdns address.
  56. */
  57. bool AddressCalc_addressForPublicKey(uint8_t addressOut[16], const uint8_t key[32]);
  58. #endif