SHA_Final(&s, output);
}
+/*
+ * Thin abstraction for things where hashes are pluggable.
+ */
+
+static void *sha1_init(void)
+{
+ SHA_State *s;
+
+ s = snew(SHA_State);
+ SHA_Init(s);
+ return s;
+}
+
+static void sha1_bytes(void *handle, void *p, int len)
+{
+ SHA_State *s = handle;
+
+ SHA_Bytes(s, p, len);
+}
+
+static void sha1_final(void *handle, unsigned char *output)
+{
+ SHA_State *s = handle;
+
+ SHA_Final(s, output);
+ sfree(s);
+}
+
+const struct ssh_hash ssh_sha1 = {
+ sha1_init, sha1_bytes, sha1_final, 20, "SHA-1"
+};
+
/* ----------------------------------------------------------------------
* The above is the SHA-1 algorithm itself. Now we implement the
* HMAC wrapper on it.
return !memcmp(correct, blk + len, 20);
}
+static void sha1_96_generate(void *handle, unsigned char *blk, int len,
+ unsigned long seq)
+{
+ unsigned char full[20];
+ sha1_do_hmac(handle, blk, len, seq, full);
+ memcpy(blk + len, full, 12);
+}
+
+static int sha1_96_verify(void *handle, unsigned char *blk, int len,
+ unsigned long seq)
+{
+ unsigned char correct[20];
+ sha1_do_hmac(handle, blk, len, seq, correct);
+ return !memcmp(correct, blk + len, 12);
+}
+
void hmac_sha1_simple(void *key, int keylen, void *data, int datalen,
unsigned char *output) {
SHA_State states[2];
"HMAC-SHA1"
};
+const struct ssh_mac ssh_hmac_sha1_96 = {
+ sha1_make_context, sha1_free_context, sha1_key,
+ sha1_96_generate, sha1_96_verify,
+ "hmac-sha1-96",
+ 12,
+ "HMAC-SHA1-96"
+};
+
const struct ssh_mac ssh_hmac_sha1_buggy = {
sha1_make_context, sha1_free_context, sha1_key_buggy,
sha1_generate, sha1_verify,
20,
"bug-compatible HMAC-SHA1"
};
+
+const struct ssh_mac ssh_hmac_sha1_96_buggy = {
+ sha1_make_context, sha1_free_context, sha1_key_buggy,
+ sha1_96_generate, sha1_96_verify,
+ "hmac-sha1-96",
+ 12,
+ "bug-compatible HMAC-SHA1-96"
+};