diff options
Diffstat (limited to 'xs_encdec.h')
| -rw-r--r-- | xs_encdec.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/xs_encdec.h b/xs_encdec.h index d3178f4..f4ffe22 100644 --- a/xs_encdec.h +++ b/xs_encdec.h @@ -7,10 +7,6 @@ xs_str *xs_hex_enc(const xs_val *data, int size); xs_val *xs_hex_dec(const xs_str *hex, int *size); int xs_is_hex(const char *str); - xs_str *xs_base32_enc(const xs_val *data, int sz); - xs_str *xs_base32hex_enc(const xs_val *data, int sz); - xs_val *xs_base32_dec(const xs_str *data, int *size); - xs_val *xs_base32hex_dec(const xs_str *data, int *size); xs_str *xs_base64_enc(const xs_val *data, int sz); xs_val *xs_base64_dec(const xs_str *data, int *size); int xs_is_base64(const char *str); @@ -84,165 +80,6 @@ int xs_is_hex(const char *str) } -/** base32 */ - -static char *xs_b32_tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" - "234567="; - -static char *xs_b32hex_tbl = "0123456789" - "ABCDEFGHIJKLMNOPQRSTUV="; - -/* - 00000|00011|11111|12222|22223|33333|33444|44444 -*/ - -xs_str *xs_base32_enc_tbl(const xs_val *data, int sz, const char *b32_tbl) -/* encodes data to base32 using a table */ -{ - xs_str *s = xs_str_new(NULL); - unsigned char *p; - int n; - - p = (unsigned char *)data; - - for (n = 0; n < sz; n += 5) { - int l = sz - n; - char enc[9] = "========"; - - enc[0] = b32_tbl[(p[n] >> 3) & 0x1f]; - - if (l > 1) { - enc[1] = b32_tbl[(p[n] << 2 | p[n + 1] >> 6) & 0x1f]; - enc[2] = b32_tbl[(p[n + 1] >> 1) & 0x1f]; - - if (l > 2) { - enc[3] = b32_tbl[(p[n + 1] << 4 | p[n + 2] >> 4) & 0x1f]; - - if (l > 3) { - enc[4] = b32_tbl[(p[n + 2] << 1 | p[n + 3] >> 7) & 0x1f]; - enc[5] = b32_tbl[(p[n + 3] >> 2) & 0x1f]; - - if (l > 4) { - enc[6] = b32_tbl[(p[n + 3] << 3 | p[n + 4] >> 5) & 0x1f]; - enc[7] = b32_tbl[(p[n + 4]) & 0x1f]; - } - else - enc[6] = b32_tbl[(p[n + 3] << 3) & 0x1f]; - } - else - enc[4] = b32_tbl[(p[n + 2] << 1) & 0x1f]; - } - else - enc[3] = b32_tbl[(p[n + 1] << 4) & 0x1f]; - } - else - enc[1] = b32_tbl[(p[n] << 2) & 0x1f]; - - s = xs_str_cat(s, enc); - } - - return s; -} - - -xs_str *xs_base32_enc(const xs_val *data, int sz) -/* encodes data to base32 */ -{ - return xs_base32_enc_tbl(data, sz, xs_b32_tbl); -} - - -xs_str *xs_base32hex_enc(const xs_val *data, int sz) -/* encodes data to base32 with HEX alphabet (RFC4648) */ -{ - return xs_base32_enc_tbl(data, sz, xs_b32hex_tbl); -} - - -xs_val *xs_base32_dec_tbl(const xs_str *data, int *size, const char *b32_tbl) -/* decodes data from base32 using a table */ -{ - xs_val *s = NULL; - int sz = 0; - char *p; - - p = (char *)data; - - /* size of data must be a multiple of 8 */ - if (strlen(p) % 8) - return NULL; - - for (p = (char *)data; *p; p += 8) { - int cs[8]; - int n; - unsigned char tmp[5]; - - for (n = 0; n < 8; n++) { - char *ss = strchr(b32_tbl, p[n]); - - if (ss == NULL) { - /* not a base32 char */ - return xs_free(s); - } - - cs[n] = ss - b32_tbl; - } - - n = 0; - - /* #0 byte */ - tmp[n++] = cs[0] << 3 | cs[1] >> 2; - - if (cs[2] != 32) { - /* #1 byte */ - tmp[n++] = (cs[1] & 0x3) << 6 | cs[2] << 1 | (cs[3] & 0x10) >> 4; - - if (cs[4] != 32) { - /* #2 byte */ - tmp[n++] = (cs[3] & 0xf) << 4 | cs[4] >> 1; - - if (cs[5] != 32) { - /* #3 byte */ - tmp[n++] = (cs[4] & 0x1) << 7 | cs[5] << 2 | cs[6] >> 3; - - if (cs[7] != 32) { - /* #4 byte */ - tmp[n++] = (cs[6] & 0x7) << 5 | cs[7]; - } - } - } - } - - /* must be done manually because data can be pure binary */ - s = xs_realloc(s, _xs_blk_size(sz + n)); - memcpy(s + sz, tmp, n); - sz += n; - } - - /* asciiz it to use it as a string */ - s = xs_realloc(s, _xs_blk_size(sz + 1)); - s[sz] = '\0'; - - *size = sz; - - return s; -} - - -xs_val *xs_base32_dec(const xs_str *data, int *size) -/* decodes data from base32 */ -{ - return xs_base32_dec_tbl(data, size, xs_b32_tbl); -} - - -xs_val *xs_base32hex_dec(const xs_str *data, int *size) -/* decodes data from base32 with HEX alphabet (RFC4648) */ -{ - return xs_base32_dec_tbl(data, size, xs_b32hex_tbl); -} - - /** base64 */ static char *xs_b64_tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |