-
-/* from php5 sources */
-static char base64_table[] =
- { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
- 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
- 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/', '\0'
- };
-static char base64_pad = '=';
-
-char *base64_encode(const unsigned char *str, int length, int *ret_length)
-{
- const unsigned char *current = str;
- char *p;
- char *result;
-
- if ((length + 2) < 0 || ((length + 2) / 3) >= (1 << (sizeof(int) * 8 - 2))) {
- if (ret_length != NULL) {
- *ret_length = 0;
- }
- return NULL;
- }
-
- result = (char *)calloc(((length + 2) / 3) * 4, sizeof(char));
- p = result;
-
- while (length > 2) { /* keep going until we have less than 24 bits */
- *p++ = base64_table[current[0] >> 2];
- *p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
- *p++ = base64_table[((current[1] & 0x0f) << 2) + (current[2] >> 6)];
- *p++ = base64_table[current[2] & 0x3f];
-
- current += 3;
- length -= 3; /* we just handle 3 octets of data */
- }
-
- /* now deal with the tail end of things */
- if (length != 0) {
- *p++ = base64_table[current[0] >> 2];
- if (length > 1) {
- *p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
- *p++ = base64_table[(current[1] & 0x0f) << 2];
- *p++ = base64_pad;
- } else {
- *p++ = base64_table[(current[0] & 0x03) << 4];
- *p++ = base64_pad;
- *p++ = base64_pad;
- }
- }
- if (ret_length != NULL) {
- *ret_length = (int)(p - result);
- }
- *p = '\0';
- return result;
-}
-
-