1 files changed, 88 insertions, 0 deletions
diff --git a/include/libecc/sig/ecdsa_common.h b/include/libecc/sig/ecdsa_common.h
new file mode 100644
index 000000000000..efaa51a76276
--- /dev/null
+++ b/include/libecc/sig/ecdsa_common.h
@@ -0,0 +1,88 @@
+/*
+ *  Copyright (C) 2017 - This file is part of libecc project
+ *
+ *  Authors:
+ *      Ryad BENADJILA <ryadbenadjila@gmail.com>
+ *      Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
+ *      Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr>
+ *
+ *  Contributors:
+ *      Nicolas VIVET <nicolas.vivet@ssi.gouv.fr>
+ *      Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr>
+ *
+ *  This software is licensed under a dual BSD and GPL v2 license.
+ *  See LICENSE file at the root folder of the project.
+ */
+#include <libecc/lib_ecc_config.h>
+#include <libecc/lib_ecc_types.h>
+#if defined(WITH_SIG_ECDSA) || defined(WITH_SIG_DECDSA)
+
+#ifndef __ECDSA_COMMON_H__
+#define __ECDSA_COMMON_H__
+
+#include <libecc/words/words.h>
+#include <libecc/sig/ec_key.h>
+#include <libecc/hash/hash_algs.h>
+#include <libecc/curves/curves.h>
+#include <libecc/utils/utils.h>
+
+#define ECDSA_R_LEN(q_bit_len)  (BYTECEIL(q_bit_len))
+#define ECDSA_S_LEN(q_bit_len)  (BYTECEIL(q_bit_len))
+#define ECDSA_SIGLEN(q_bit_len) (ECDSA_R_LEN(q_bit_len) + \
+				 ECDSA_S_LEN(q_bit_len))
+#define ECDSA_MAX_SIGLEN ECDSA_SIGLEN(CURVES_MAX_Q_BIT_LEN)
+
+/*
+ * Compute max signature length for all the mechanisms enabled
+ * in the library (see lib_ecc_config.h). Having that done during
+ * preprocessing sadly requires some verbosity.
+ */
+#ifndef EC_MAX_SIGLEN
+#define EC_MAX_SIGLEN 0
+#endif
+#if ((EC_MAX_SIGLEN) < (ECDSA_MAX_SIGLEN))
+#undef EC_MAX_SIGLEN
+#define EC_MAX_SIGLEN ECDSA_MAX_SIGLEN
+#endif
+
+typedef struct {
+	hash_context h_ctx;
+	word_t magic;
+} ecdsa_sign_data;
+
+struct ec_sign_context;
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_init_pub_key(ec_pub_key *out_pub, const ec_priv_key *in_priv, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_siglen(u16 p_bit_len, u16 q_bit_len, u8 hsize, u8 blocksize, u8 *siglen);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_init(struct ec_sign_context *ctx, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_update(struct ec_sign_context *ctx,
+		       const u8 *chunk, u32 chunklen, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_finalize(struct ec_sign_context *ctx, u8 *sig, u8 siglen, ec_alg_type key_type);
+
+typedef struct {
+	nn r;
+	nn s;
+	hash_context h_ctx;
+	word_t magic;
+} ecdsa_verify_data;
+
+struct ec_verify_context;
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_init(struct ec_verify_context *ctx,
+		       const u8 *sig, u8 siglen, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_update(struct ec_verify_context *ctx,
+			 const u8 *chunk, u32 chunklen, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_finalize(struct ec_verify_context *ctx, ec_alg_type key_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_public_key_from_sig(ec_pub_key *out_pub1, ec_pub_key *out_pub2, const ec_params *params,
+                                const u8 *sig, u8 siglen, const u8 *hash, u8 hsize,
+                                ec_alg_type key_type);
+
+#endif /* __ECDSA_COMMON_H__ */
+#endif /* defined(WITH_SIG_ECDSA) || defined(WITH_SIG_DECDSA) */