Encode a BIGNUM as a fixed-length big-endian unsigned byte string.
Declared in <openssl/bn.h>
int
BN_bn2binpad(
BIGNUM const* a,
unsigned char* to,
int tolen);tolen on success, or -1 if a does not fit in tolen bytes.
| Name | Description |
|---|---|
| a | Value to encode (absolute value; sign is ignored). |
| to | Destination buffer of tolen bytes; leading zeros are written as needed. |
| tolen | Exact output length in bytes. |