libqaeda

commit 4e882ad6e1d33574f987d7cf7d4317acee904c5c
parent a2ba4134748996e8a3603bd43a897aac7986bcc1
Author: lash <dev@holbrook.no>
Date:   Sat,  1 Mar 2025 17:40:09 +0000

Add digest

Diffstat:
M
src/crypto/dummy.c
 | 
21
+++++++++++++++++++++
M
src/lq/crypto.h
 | 
5
+++++
M
src/lq/mem.h
 | 
4
++--
M
src/lq/msg.c
 | 
11
++++++++---

4 files changed, 36 insertions(+), 5 deletions(-)
diff --git a/src/crypto/dummy.c b/src/crypto/dummy.c
@@ -21,6 +21,14 @@ static const char sig_dummy_transform[64] = {
 	0x5b, 0xe3, 0xaa, 0x2f, 0xc1, 0xe6, 0xc1, 0x81,
 };
 
+// sha256sum "baz" baa5a0964d3320fbc0c6a922140453c8513ea24ab8fd0577034804a967248096
+static const char digest_dummy_transform[32] = {
+	0xba, 0xa5, 0xa0, 0x96, 0x4d, 0x33, 0x20, 0xfb,
+	0xc0, 0xc6, 0xa9, 0x22, 0x14, 0x04, 0x53, 0xc8,
+	0x51, 0x3e, 0xa2, 0x4a, 0xb8, 0xfd, 0x05, 0x77, 
+	0x03, 0x48, 0x04, 0xa9, 0x67, 0x24, 0x80, 0x96
+};
+
 LQPrivKey* lq_privatekey_new(char *seed, size_t seed_len) {
 	LQPrivKey *pk;
 
@@ -112,3 +120,16 @@ void lq_signature_free(LQSig *sig) {
 	lq_free(sig->losig);		
 	lq_free(sig);
 }
+
+int lq_digest(const char *in, size_t in_len, char *out) {
+	int i;
+	int ii;
+	lq_set(out, 0, LQ_DIGEST_LEN);
+
+	for (i = 0; i < in_len; i++) {
+		ii = i % LQ_DIGEST_LEN;
+		*(out + ii) = *(in + i) ^ digest_dummy_transform[ii];
+	}
+
+	return 0;
+}
diff --git a/src/lq/crypto.h b/src/lq/crypto.h
@@ -3,6 +3,10 @@
 
 #include <stddef.h>
 
+#ifndef LQ_DIGEST_LEN
+#define LQ_DIGEST_LEN 32
+#endif
+
 struct lq_privatekey_t {
 	int key_typ;
 	void *lokey;
@@ -31,5 +35,6 @@ LQSig* lq_privatekey_sign(LQPrivKey *pk, const char *msg, size_t msg_len, const 
 void lq_publickey_free(LQPubKey *pubk);
 void lq_privatekey_free(LQPrivKey *pk);
 void lq_signature_free(LQSig *sig);
+int lq_digest(const char *in, size_t in_len, char *out);
 
 #endif // LIBQAEDA_CRYPTO_H_
diff --git a/src/lq/mem.h b/src/lq/mem.h
@@ -5,7 +5,7 @@
 
 void* lq_alloc(size_t bytes);
 void lq_free(void *o);
-void* lq_cpy(void *dst, void *src, size_t len);
-void* lq_set(void *dst, char b, size_t len);
+void* lq_cpy(void *dst, const void *src, size_t len);
+void* lq_set(void *dst, const char b, size_t len);
 
 #endif // LIBQAEDA_MEM_H_
diff --git a/src/lq/msg.c b/src/lq/msg.c
@@ -24,16 +24,21 @@ int lq_msg_sign(LQMsg *msg, LQPrivKey *pk) {
 }
 
 int lq_msg_sign_salted(LQMsg *msg, LQPrivKey *pk, const char *salt, size_t salt_len) {
+	size_t l;
+	int r;
 	char *data;
+	char digest[LQ_DIGEST_LEN];
 
-	data = lq_alloc(LQ_MSG_DOMAIN_LEN + msg->len);
+	l = LQ_MSG_DOMAIN_LEN + msg->len;
+	data = lq_alloc(l);
 	lq_cpy(data, msg->domain, LQ_MSG_DOMAIN_LEN);
 	lq_cpy(data + LQ_MSG_DOMAIN_LEN, msg->data, msg->len);
 	msg->pubkey = lq_publickey_from_privatekey(pk);
 
-	// TODO: digest msg
+	r = lq_digest(data, l, (char*)digest);
 	msg->signature = lq_privatekey_sign(pk, msg->data, msg->len, salt, salt_len);
-	return 0;
+
+	return r;
 }
 
 void lq_msg_free(LQMsg *msg) {