From: Rudolf Polzer <divverent@alientrap.org>
Date: Mon, 5 Jul 2010 09:25:58 +0000 (+0200)
Subject: add d0_blind_id_fingerprint64_public_key
X-Git-Tag: xonotic-v0.1.0preview~38^2~19
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=3d6c20c20f33d4d421fce506a5904948612fbe1a;p=xonotic%2Fd0_blind_id.git

add d0_blind_id_fingerprint64_public_key
---

diff --git a/d0_blind_id.c b/d0_blind_id.c
index 108f082..d2fc631 100644
--- a/d0_blind_id.c
+++ b/d0_blind_id.c
@@ -314,6 +314,38 @@ fail:
 	return 0;
 }
 
+WARN_UNUSED_RESULT BOOL d0_blind_id_fingerprint64_public_key(d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen)
+{
+	d0_iobuf_t *out = NULL;
+	static unsigned char convbuf[2048];
+	d0_iobuf_t *conv = NULL;
+	size_t sz, n;
+
+	USING(schnorr_4_to_s);
+
+	out = d0_iobuf_open_write(outbuf, *outbuflen);
+	conv = d0_iobuf_open_write(convbuf, sizeof(convbuf));
+
+	CHECK(d0_iobuf_write_bignum(conv, ctx->rsa_n));
+	CHECK(d0_iobuf_write_bignum(conv, ctx->rsa_e));
+	CHECK(d0_iobuf_close(conv, &sz));
+	conv = NULL;
+
+	n = (*outbuflen / 4) * 3;
+	if(n > SHA_DIGESTSIZE)
+		n = SHA_DIGESTSIZE;
+	CHECK(d0_iobuf_write_raw(out, sha(convbuf, sz), n) == n);
+	CHECK(d0_iobuf_conv_base64_out(out));
+
+	return d0_iobuf_close(out, outbuflen);
+
+fail:
+	if(conv)
+		d0_iobuf_close(conv, &sz);
+	d0_iobuf_close(out, outbuflen);
+	return 0;
+}
+
 WARN_UNUSED_RESULT BOOL d0_blind_id_generate_private_id_modulus(d0_blind_id_t *ctx)
 {
 	USING(rsa_n);
diff --git a/d0_blind_id.h b/d0_blind_id.h
index 177682b..5260aca 100644
--- a/d0_blind_id.h
+++ b/d0_blind_id.h
@@ -14,6 +14,7 @@ EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_read_private_key(d0_blind_id_t *ctx,
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_read_public_key(d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_write_private_key(d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_write_public_key(d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
+EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_fingerprint64_public_key(d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_generate_private_id_modulus(d0_blind_id_t *ctx);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_read_private_id_modulus(d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_write_private_id_modulus(d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);