5 * Encode BER length octets. If exact, lenlen is the exact desired
6 * encoding size, else, lenlen is the max available space. Len < 0 =
8 * Returns: >0 success, number of bytes encoded.
9 * Returns: =0 success, indefinite start-marker set. 1 byte encoded.
10 * Returns: -1 failure, out of bounds.
12 int ber_enclen(unsigned char *buf, int len, int lenlen, int exact)
14 unsigned char *b = buf;
15 unsigned char octs[sizeof(int)];
18 fprintf(stderr, "[len=%d]", len);
19 if (len < 0) /* Indefinite */
22 fprintf(stderr, "[indefinite]");
25 if (len <= 127 && (lenlen == 1 || !exact)) /* definite short form */
35 /* definite long form */
46 while (n < --lenlen) /* pad length octets */
50 *buf = (b - buf - 1) | 0X80;
55 * Decode BER length octets. Returns number of bytes read or -1 for error.
57 * len = -1 indefinite.
60 int ber_declen(unsigned char *buf, int *len)
62 unsigned char *b = buf;
65 if (*b == 0X80) /* Indefinite */
68 fprintf(stderr, "[len=%d]", *len);
71 if (!(*b & 0X80)) /* Definite short form */
74 fprintf(stderr, "[len=%d]", *len);
77 if (*b == 0XFF) /* reserved value */
79 /* indefinite long form */
88 fprintf(stderr, "[len=%d]", *len);