| 72 | } |
| 73 | |
| 74 | bool from_bech32_charset(const tal_t *ctx, |
| 75 | const char *bech32, |
| 76 | size_t bech32_len, |
| 77 | char **hrp, u8 **data) |
| 78 | { |
| 79 | u5 *u5data; |
| 80 | const char *sep; |
| 81 | bool upper = false, lower = false; |
| 82 | size_t datalen; |
| 83 | |
| 84 | sep = memchr(bech32, '1', bech32_len); |
| 85 | if (!sep) |
| 86 | return false; |
| 87 | |
| 88 | *hrp = tal_strndup(ctx, bech32, sep - bech32); |
| 89 | for (size_t i = 0; i < strlen(*hrp); i++) |
| 90 | (*hrp)[i] = fixup_char((*hrp)[i], &upper, &lower); |
| 91 | |
| 92 | datalen = bech32_len - (sep + 1 - bech32); |
| 93 | u5data = tal_arr(NULL, u5, datalen); |
| 94 | for (size_t i = 0; i < datalen; i++) { |
| 95 | int c = sep[1+i]; |
| 96 | c = fixup_char(c, &upper, &lower); |
| 97 | if (c < 0 || c >= 128) |
| 98 | goto fail; |
| 99 | if (bech32_charset_rev[c] == -1) |
| 100 | goto fail; |
| 101 | u5data[i] = bech32_charset_rev[c]; |
| 102 | } |
| 103 | |
| 104 | /* Check case consistency */ |
| 105 | if (upper && lower) |
| 106 | goto fail; |
| 107 | |
| 108 | *data = tal_arr(ctx, u8, 0); |
| 109 | if (!bech32_pull_bits(data, u5data, tal_bytelen(u5data) * 5)) { |
| 110 | tal_free(*data); |
| 111 | goto fail; |
| 112 | } |
| 113 | tal_free(u5data); |
| 114 | return true; |
| 115 | |
| 116 | fail: |
| 117 | *hrp = tal_free(*hrp); |
| 118 | tal_free(u5data); |
| 119 | return false; |
| 120 | } |
| 121 | |
| 122 | /* BOLT #12: |
| 123 | * # Encoding |
no test coverage detected