libqaeda

commit 437be0af6c0861a78e8b07da6dc853c455fd39ff
parent 96693450952ec3f9c060e2323b2276e070156e9f
Author: lash <dev@holbrook.no>
Date:   Sat,  1 Mar 2025 16:38:08 +0000

Implement dummy crypto pubkey, sig

Diffstat:
M
src/crypto/dummy.c
 | 
67
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
M
src/lq/crypto.h
 | 
3
++-
M
src/lq/ctx.c
 | 
2
--

3 files changed, 67 insertions(+), 5 deletions(-)
diff --git a/src/crypto/dummy.c b/src/crypto/dummy.c
@@ -1,6 +1,26 @@
 #include "lq/crypto.h"
 #include "lq/mem.h"
 
+// sha256sum "foo" 2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
+static const char pubkey_dummy_transform[32] = {
+	0x2c, 0x26, 0xb4, 0x6b, 0x68, 0xff, 0xc6, 0x8f,
+	0xf9, 0x9b, 0x45, 0x3c, 0x1d, 0x30, 0x41, 0x34,
+	0x13, 0x42, 0x2d, 0x70, 0x64, 0x83, 0xbf, 0xa0,
+	0xf9, 0x8a, 0x5e, 0x88, 0x62, 0x66, 0xe7, 0xae
+};
+
+// sha512sum "bar" d82c4eb5261cb9c8aa9855edd67d1bd10482f41529858d925094d173fa662aa91ff39bc5b188615273484021dfb16fd8284cf684ccf0fc795be3aa2fc1e6c181
+static const char sig_dummy_transform[64] = {
+	0xd8, 0x2c, 0x4e, 0xb5, 0x26, 0x1c, 0xb9, 0xc8,
+	0xaa, 0x98, 0x55, 0xed, 0xd6, 0x7d, 0x1b, 0xd1,
+	0x04, 0x82, 0xf4, 0x15, 0x29, 0x85, 0x8d, 0x92,
+	0x50, 0x94, 0xd1, 0x73, 0xfa, 0x66, 0x2a, 0xa9,
+	0x1f, 0xf3, 0x9b, 0xc5, 0xb1, 0x88, 0x61, 0x52,
+	0x73, 0x48, 0x40, 0x21, 0xdf, 0xb1, 0x6f, 0xd8,
+	0x28, 0x4c, 0xf6, 0x84, 0xcc, 0xf0, 0xfc, 0x79,
+	0x5b, 0xe3, 0xaa, 0x2f, 0xc1, 0xe6, 0xc1, 0x81,
+};
+
 LQPrivKey* lq_privatekey_new(char *seed, size_t seed_len) {
 	LQPrivKey *pk;
 
@@ -29,15 +49,58 @@ LQPubKey* lq_publickey_new(char *full, size_t full_len) {
 }
 
 LQPubKey* lq_publickey_from_privatekey(LQPrivKey *pk) {
+	int i;
+	char *src;
+	char *dst;
 	LQPubKey *pubk;
 
 	pubk = lq_alloc(sizeof(LQPubKey));
+	pubk->pk = pk;
+	pubk->lokey = lq_alloc(pk->lolen);
+	pubk->lolen = pk->lolen;
+	lq_cpy(pubk->lokey, pk->lokey, pk->lolen);
+	for (i = 0; i < pubk->lolen; i++) {
+		src = pk->lokey + i;
+		*src ^= *(pubkey_dummy_transform + i);
+		dst = pubk->lokey + i;
+		*dst = *src;
+	}
 
 	return pubk;
 }
 
-LQSig* lq_privatekey_sign(LQPrivKey *pk, char *sig, size_t *sig_len, const char *salt, size_t salt_len) {
-	return NULL;
+LQSig* lq_privatekey_sign(LQPrivKey *pk, char *msg, size_t msg_len, const char *salt, size_t salt_len) {
+	int i;
+	char *src;
+	char *dst;
+	LQSig *sig;
+
+	if (msg_len != 32) {
+		return NULL;
+	}
+	if (salt_len != 32) {
+		return NULL;
+	}
+
+	sig = lq_alloc(sizeof(LQSig));
+	sig->pubkey = lq_publickey_from_privatekey(pk);
+	sig->lolen = msg_len * 2 + 1;
+	sig->losig = lq_alloc(sig->lolen);
+
+	for (i = 0; i < msg_len; i++) {
+		src = msg + i;
+		dst = sig->losig + i;
+		*dst = *src ^ sig_dummy_transform[i];
+		*dst ^= *(salt + i);
+
+		src += msg_len;
+		dst += msg_len;
+		*dst = *src ^ sig_dummy_transform[i + msg_len];
+		*dst ^= *(salt + i);
+	}
+	*((char*)sig->losig + sig->lolen) = 0x2a;
+
+	return sig;
 }
 
 void lq_publickey_free(LQPubKey *pubk) {
diff --git a/src/lq/crypto.h b/src/lq/crypto.h
@@ -27,8 +27,9 @@ typedef struct lq_signature_t LQSig;
 LQPrivKey* lq_privatekey_new(char *seed, size_t seed_len);
 LQPubKey* lq_publickey_new(char *full, size_t full_len);
 LQPubKey* lq_publickey_from_privatekey(LQPrivKey *pk);
-LQSig* lq_privatekey_sign(LQPrivKey *pk, char *sig, size_t *sig_len, const char *salt, size_t salt_len);
+LQSig* lq_privatekey_sign(LQPrivKey *pk, char *msg, size_t msg_len, const char *salt, size_t salt_len);
 void lq_publickey_free(LQPubKey *pubk);
 void lq_privatekey_free(LQPrivKey *pk);
+void lq_signature_free(LQSig *sig);
 
 #endif // LIBQAEDA_CRYPTO_H_
diff --git a/src/lq/ctx.c b/src/lq/ctx.c
@@ -1,5 +1,3 @@
-#include <stdlib.h>
-
 #include "lq/ctx.h"
 #include "lq/mem.h"