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114 lines
3.2 KiB
114 lines
3.2 KiB
8 years ago
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#ifndef LIBWALLY_CORE_BIP39_H
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#define LIBWALLY_CORE_BIP39_H
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#include "wally_core.h"
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#include <stdint.h>
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struct words;
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/** Valid entropy lengths */
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#define BIP39_ENTROPY_LEN_128 16
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#define BIP39_ENTROPY_LEN_160 20
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#define BIP39_ENTROPY_LEN_192 24
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#define BIP39_ENTROPY_LEN_224 28
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#define BIP39_ENTROPY_LEN_256 32
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#define BIP39_ENTROPY_LEN_288 36
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#define BIP39_ENTROPY_LEN_320 40
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/** The required size of the output buffer for @bip39_mnemonic_to_seed */
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#define BIP39_SEED_LEN_512 64
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/** The number of words in a BIP39 compliant wordlist */
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#define BIP39_WORDLIST_LEN 2048
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/**
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* Get the list of default supported languages.
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*
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* The string returned should be freed using @wally_free_string.
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*/
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WALLY_CORE_API int bip39_get_languages(
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char **output);
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/**
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* Get the default word list for language @lang.
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*
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* If @lang is NULL or not found the default English list is returned.
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*
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* The returned structure should not be freed.
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*/
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WALLY_CORE_API int bip39_get_wordlist(
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const char *lang,
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const struct words **output);
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/**
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* Get the 'index'th word from a word list.
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*
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* @w Word list to use. Pass NULL to use the default English list.
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* @index The 0-based index of the word in @w.
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* @output Destination for the resulting word.
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*
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* The string returned should be freed using @wally_free_string.
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*/
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WALLY_CORE_API int bip39_get_word(
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const struct words *w,
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size_t index,
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char **output);
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/**
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* Generate a mnemonic sentence from the entropy in @bytes_in.
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* @w Word list to use. Pass NULL to use the default English list.
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* @bytes_in: Entropy to convert.
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* @len_in: The length of @bytes_in in bytes.
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* @output Destination for the resulting mnemonic sentence.
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*
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* The string returned should be freed using @wally_free_string.
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*/
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WALLY_CORE_API int bip39_mnemonic_from_bytes(
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const struct words *w,
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const unsigned char *bytes_in,
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size_t len_in,
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char **output);
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/**
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* Convert a mnemonic sentence into entropy at @bytes_out.
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* @w Word list to use. Pass NULL to use the default English list.
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* @mnemonic Mnemonic to convert.
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* @bytes_out: Where to store the resulting entropy.
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* @len: The length of @bytes_out in bytes.
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* @written: Destination for the number of bytes written to @bytes_out.
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*/
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WALLY_CORE_API int bip39_mnemonic_to_bytes(
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const struct words *w,
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const char *mnemonic,
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unsigned char *bytes_out,
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size_t len,
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size_t *written);
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/**
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* Validate the checksum embedded in the mnemonic sentence @mnemonic.
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* @w Word list to use. Pass NULL to use the default English list.
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* @mnemonic Mnemonic to validate.
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*/
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WALLY_CORE_API int bip39_mnemonic_validate(
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const struct words *w,
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const char *mnemonic);
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/**
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* Convert a mnemonic into a binary seed.
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* @mnemonic Mnemonic to convert.
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* @password Mnemonic password or NULL if no password is needed.
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* @bytes_out The destination for the binary seed.
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* @len The length of @bytes_out in bytes. Currently This must
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* be @BIP39_SEED_LEN_512.
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* @written: Destination for the number of bytes written to @bytes_out.
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*/
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WALLY_CORE_API int bip39_mnemonic_to_seed(
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const char *mnemonic,
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const char *password,
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unsigned char *bytes_out,
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size_t len,
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size_t *written);
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#endif /* LIBWALLY_CORE_BIP39_H */
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