1  /*
 2   *  Copyright (C) 2017 - This file is part of libecc project
 3   *
 4   *  Authors:
 5   *      Ryad BENADJILA <ryadbenadjila@gmail.com>
 6   *      Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
 7   *      Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr>
 8   *
 9   *  Contributors:
10   *      Nicolas VIVET <nicolas.vivet@ssi.gouv.fr>
11   *      Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr>
12   *
13   *  This software is licensed under a dual BSD and GPL v2 license.
14   *  See LICENSE file at the root folder of the project.
15   */
16  #include <libecc/lib_ecc_config.h>
17  #include <libecc/lib_ecc_types.h>
18  #ifdef WITH_SIG_ECRDSA
19  
20  #ifndef __ECRDSA_H__
21  #define __ECRDSA_H__
22  
23  #include <libecc/words/words.h>
24  #include <libecc/sig/ec_key.h>
25  #include <libecc/hash/hash_algs.h>
26  #include <libecc/curves/curves.h>
27  #include <libecc/utils/utils.h>
28  
29  #define ECRDSA_R_LEN(q_bit_len)  (BYTECEIL(q_bit_len))
30  #define ECRDSA_S_LEN(q_bit_len)  (BYTECEIL(q_bit_len))
31  #define ECRDSA_SIGLEN(q_bit_len) (ECRDSA_R_LEN(q_bit_len) + \
32  				  ECRDSA_S_LEN(q_bit_len))
33  #define ECRDSA_MAX_SIGLEN ECRDSA_SIGLEN(CURVES_MAX_Q_BIT_LEN)
34  
35  /*
36   * Compute max signature length for all the mechanisms enabled
37   * in the library (see lib_ecc_config.h). Having that done during
38   * preprocessing sadly requires some verbosity.
39   */
40  #ifndef EC_MAX_SIGLEN
41  #define EC_MAX_SIGLEN 0
42  #endif
43  #if ((EC_MAX_SIGLEN) < (ECRDSA_MAX_SIGLEN))
44  #undef EC_MAX_SIGLEN
45  #define EC_MAX_SIGLEN ECRDSA_MAX_SIGLEN
46  #endif
47  
48  ATTRIBUTE_WARN_UNUSED_RET int ecrdsa_init_pub_key(ec_pub_key *out_pub, const ec_priv_key *in_priv);
49  
50  ATTRIBUTE_WARN_UNUSED_RET int ecrdsa_siglen(u16 p_bit_len, u16 q_bit_len, u8 hsize, u8 blocksize,
51  		  u8 *siglen);
52  
53  typedef struct {
54  	hash_context h_ctx;
55  	word_t magic;
56  } ecrdsa_sign_data;
57  
58  struct ec_sign_context;
59  
60  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_sign_init(struct ec_sign_context *ctx);
61  
62  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_sign_update(struct ec_sign_context *ctx,
63  			const u8 *chunk, u32 chunklen);
64  
65  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_sign_finalize(struct ec_sign_context *ctx, u8 *sig, u8 siglen);
66  
67  typedef struct {
68  	hash_context h_ctx;
69  	nn r;
70  	nn s;
71  	word_t magic;
72  } ecrdsa_verify_data;
73  
74  struct ec_verify_context;
75  
76  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_verify_init(struct ec_verify_context *ctx,
77  			const u8 *sig, u8 siglen);
78  
79  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_verify_update(struct ec_verify_context *ctx,
80  			  const u8 *chunk, u32 chunklen);
81  
82  ATTRIBUTE_WARN_UNUSED_RET int _ecrdsa_verify_finalize(struct ec_verify_context *ctx);
83  
84  #endif /* __ECRDSA_H__ */
85  #endif /* WITH_SIG_ECRDSA */