dhcp/dst/hmac_link.c

67  *     priv_key    key to use for signing.
84 	HMAC_Key *key;
97 	key = (HMAC_Key *) d_key->dk_KEY_struct;
101 		MD5Update(ctx, key->hk_ipad, HMAC_LEN);
114 		MD5Update(ctx, key->hk_opad, HMAC_LEN);
137  *     dkey	key to use for verify.
152 	HMAC_Key *key;
165 	key = (HMAC_Key *) d_key->dk_KEY_struct;
168 		MD5Update(ctx, key->hk_ipad, HMAC_LEN);
175 		if (signature == NULL || key == NULL || sig_len != MD5_LEN)
181 		MD5Update(ctx, key->hk_opad, HMAC_LEN);
200  *     Converts key from raw data to an HMAC Key
203  *     hkey	the HMAC key to be filled in
204  *     key	the key in raw format
205  *     keylen	the length of the key
211 dst_buffer_to_hmac_md5(DST_KEY *dkey, const u_char *key, const unsigned keylen)
218 	if (dkey == NULL || key == NULL || keylen < 0)
227 	/* if key is longer than HMAC_LEN bytes reset it to key=MD5(key) */
231 		MD5Update(&ctx, (const unsigned char *)key, keylen);
234 		key = tk;
237 	/* start out by storing key in pads */
238 	memcpy(hkey->hk_ipad, key, local_keylen);
239 	memcpy(hkey->hk_opad, key, local_keylen);
241 	/* XOR key with hk_ipad and opad values */
272 	u_char key[HMAC_LEN];
288 	memset(key, 0, HMAC_LEN);
290 		key[i] = hkey->hk_ipad[i] ^ HMAC_IPAD;
292 		if (key[i] != 0)
300 	len = b64_ntop(key, key_len, bp, b_len);
314  *     Converts contents of a key file into an HMAC key.
316  *     hkey    structure to put key into
317  *     buff       buffer containing the encoded key
320  *     n >= 0 Foot print of the key converted
329 	u_char key[HMAC_LEN+1];	/* b64_pton needs more than 64 bytes do decode
341 	memset(key, 0, sizeof(key));
353 	key_len = b64_pton((char *)tmp, key, HMAC_LEN+1);	/* see above */
356 	if (dst_buffer_to_hmac_md5(dkey, key, key_len) < 0) {
364  *         function to extract hmac key from DST_KEY structure
366  *      in_key:  HMAC-MD5 key
413 dst_hmac_md5_free_key_structure(void *key)
415 	HMAC_Key *hkey = key;
423  *     Creates a HMAC key of size size with a maximum size of 63 bytes
424  *     generating a HMAC key larger than 63 bytes makes no sense as that key
429 dst_hmac_md5_generate_key(DST_KEY *key, const int nothing)
435 	if (key == NULL || key->dk_alg != KEY_HMAC_MD5)
437 	size = (key->dk_key_size + 7) / 8; /* convert to bytes */
450 	n = dst_buffer_to_hmac_md5(key, buff, len);