[PATCH v3 1/3] lib: ecdsa: Add ECDSA384 support

[Chia-Wei Wang]

Add ECDSA384 algorithm support for image signing and verification.

Signed-off-by: Chia-Wei Wang <chiawei_wang at aspeedtech.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
 include/u-boot/ecdsa.h   |  1 +
 lib/ecdsa/ecdsa-verify.c | 14 +++++++++++---
 tools/image-sig-host.c   |  7 +++++++
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/u-boot/ecdsa.h b/include/u-boot/ecdsa.h
index 8f9f5e7d6e7..f0ac0f327e9 100644
--- a/include/u-boot/ecdsa.h
+++ b/include/u-boot/ecdsa.h
@@ -65,6 +65,7 @@ int ecdsa_verify(struct image_sign_info *info,
 /** @} */
 
 #define ECDSA256_BYTES	(256 / 8)
+#define ECDSA384_BYTES	(384 / 8)
 #define ECDSA521_BYTES	((521 + 7) / 8)
 
 #endif
diff --git a/lib/ecdsa/ecdsa-verify.c b/lib/ecdsa/ecdsa-verify.c
index 4d1835b598a..629b662cf6c 100644
--- a/lib/ecdsa/ecdsa-verify.c
+++ b/lib/ecdsa/ecdsa-verify.c
@@ -22,8 +22,10 @@ static int ecdsa_key_size(const char *curve_name)
 {
 	if (!strcmp(curve_name, "prime256v1"))
 		return 256;
-	else
-		return 0;
+	else if (!strcmp(curve_name, "secp384r1"))
+		return 384;
+
+	return 0;
 }
 
 static int fdt_get_key(struct ecdsa_public_key *key, const void *fdt, int node)
@@ -121,12 +123,18 @@ int ecdsa_verify(struct image_sign_info *info,
 	return ecdsa_verify_hash(dev, info, hash, sig, sig_len);
 }
 
-U_BOOT_CRYPTO_ALGO(ecdsa) = {
+U_BOOT_CRYPTO_ALGO(ecdsa256) = {
 	.name = "ecdsa256",
 	.key_len = ECDSA256_BYTES,
 	.verify = ecdsa_verify,
 };
 
+U_BOOT_CRYPTO_ALGO(ecdsa384) = {
+	.name = "ecdsa384",
+	.key_len = ECDSA384_BYTES,
+	.verify = ecdsa_verify,
+};
+
 /*
  * uclass definition for ECDSA API
  *
diff --git a/tools/image-sig-host.c b/tools/image-sig-host.c
index 21b4fa5d39d..5285263c616 100644
--- a/tools/image-sig-host.c
+++ b/tools/image-sig-host.c
@@ -76,6 +76,13 @@ struct crypto_algo crypto_algos[] = {
 		.add_verify_data = ecdsa_add_verify_data,
 		.verify = ecdsa_verify,
 	},
+	{
+		.name = "ecdsa384",
+		.key_len = ECDSA384_BYTES,
+		.sign = ecdsa_sign,
+		.add_verify_data = ecdsa_add_verify_data,
+		.verify = ecdsa_verify,
+	},
 	{
 		.name = "secp521r1",
 		.key_len = ECDSA521_BYTES,
-- 
2.25.1