release/src/router/openssl/crypto/jpake/jpake.h

   1 /*
   2  * Implement J-PAKE, as described in
   3  * http://grouper.ieee.org/groups/1363/Research/contributions/hao-ryan-2008.pdf
   4  *
   5  * With hints from http://www.cl.cam.ac.uk/~fh240/software/JPAKE2.java.
   6  */
   7
   8 #ifndef HEADER_JPAKE_H
   9 #define HEADER_JPAKE_H
  10
  11 #include <openssl/opensslconf.h>
  12
  13 #ifdef OPENSSL_NO_JPAKE
  14 #error JPAKE is disabled.
  15 #endif
  16
  17 #ifdef  __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 #include <openssl/bn.h>
  22 #include <openssl/sha.h>
  23
  24 typedef struct JPAKE_CTX JPAKE_CTX;
  25
  26 /* Note that "g" in the ZKPs is not necessarily the J-PAKE g. */
  27 typedef struct
  28     {
  29     BIGNUM *gr; /* g^r (r random) */
  30     BIGNUM *b;  /* b = r - x*h, h=hash(g, g^r, g^x, name) */
  31     } JPAKE_ZKP;
  32
  33 typedef struct
  34     {
  35     BIGNUM *gx;       /* g^x in step 1, g^(xa + xc + xd) * xb * s in step 2 */
  36     JPAKE_ZKP zkpx;   /* ZKP(x) or ZKP(xb * s) */
  37     } JPAKE_STEP_PART;
  38
  39 typedef struct
  40     {
  41     JPAKE_STEP_PART p1;   /* g^x3, ZKP(x3) or g^x1, ZKP(x1) */
  42     JPAKE_STEP_PART p2;   /* g^x4, ZKP(x4) or g^x2, ZKP(x2) */
  43     } JPAKE_STEP1;
  44
  45 typedef JPAKE_STEP_PART JPAKE_STEP2;
  46
  47 typedef struct
  48     {
  49     unsigned char hhk[SHA_DIGEST_LENGTH];
  50     } JPAKE_STEP3A;
  51
  52 typedef struct
  53     {
  54     unsigned char hk[SHA_DIGEST_LENGTH];
  55     } JPAKE_STEP3B;
  56
  57 /* Parameters are copied */
  58 JPAKE_CTX *JPAKE_CTX_new(const char *name, const char *peer_name,
  59                          const BIGNUM *p, const BIGNUM *g, const BIGNUM *q,
  60                          const BIGNUM *secret);
  61 void JPAKE_CTX_free(JPAKE_CTX *ctx);
  62
  63 /*
  64  * Note that JPAKE_STEP1 can be used multiple times before release
  65  * without another init.
  66  */
  67 void JPAKE_STEP1_init(JPAKE_STEP1 *s1);
  68 int JPAKE_STEP1_generate(JPAKE_STEP1 *send, JPAKE_CTX *ctx);
  69 int JPAKE_STEP1_process(JPAKE_CTX *ctx, const JPAKE_STEP1 *received);
  70 void JPAKE_STEP1_release(JPAKE_STEP1 *s1);
  71
  72 /*
  73  * Note that JPAKE_STEP2 can be used multiple times before release
  74  * without another init.
  75  */
  76 void JPAKE_STEP2_init(JPAKE_STEP2 *s2);
  77 int JPAKE_STEP2_generate(JPAKE_STEP2 *send, JPAKE_CTX *ctx);
  78 int JPAKE_STEP2_process(JPAKE_CTX *ctx, const JPAKE_STEP2 *received);
  79 void JPAKE_STEP2_release(JPAKE_STEP2 *s2);
  80
  81 /*
  82  * Optionally verify the shared key. If the shared secrets do not
  83  * match, the two ends will disagree about the shared key, but
  84  * otherwise the protocol will succeed.
  85  */
  86 void JPAKE_STEP3A_init(JPAKE_STEP3A *s3a);
  87 int JPAKE_STEP3A_generate(JPAKE_STEP3A *send, JPAKE_CTX *ctx);
  88 int JPAKE_STEP3A_process(JPAKE_CTX *ctx, const JPAKE_STEP3A *received);
  89 void JPAKE_STEP3A_release(JPAKE_STEP3A *s3a);
  90
  91 void JPAKE_STEP3B_init(JPAKE_STEP3B *s3b);
  92 int JPAKE_STEP3B_generate(JPAKE_STEP3B *send, JPAKE_CTX *ctx);
  93 int JPAKE_STEP3B_process(JPAKE_CTX *ctx, const JPAKE_STEP3B *received);
  94 void JPAKE_STEP3B_release(JPAKE_STEP3B *s3b);
  95
  96 /*
  97  * the return value belongs to the library and will be released when
  98  * ctx is released, and will change when a new handshake is performed.
  99  */
 100 const BIGNUM *JPAKE_get_shared_key(JPAKE_CTX *ctx);
 101
 102 /* BEGIN ERROR CODES */
 103 /* The following lines are auto generated by the script mkerr.pl. Any changes
 104  * made after this point may be overwritten when the script is next run.
 105  */
 106 void ERR_load_JPAKE_strings(void);
 107
 108 /* Error codes for the JPAKE functions. */
 109
 110 /* Function codes. */
 111 #define JPAKE_F_JPAKE_STEP1_PROCESS                      101
 112 #define JPAKE_F_JPAKE_STEP2_PROCESS                      102
 113 #define JPAKE_F_JPAKE_STEP3A_PROCESS                     103
 114 #define JPAKE_F_JPAKE_STEP3B_PROCESS                     104
 115 #define JPAKE_F_VERIFY_ZKP                               100
 116
 117 /* Reason codes. */
 118 #define JPAKE_R_G_TO_THE_X3_IS_NOT_LEGAL                 108
 119 #define JPAKE_R_G_TO_THE_X4_IS_NOT_LEGAL                 109
 120 #define JPAKE_R_G_TO_THE_X4_IS_ONE                       105
 121 #define JPAKE_R_HASH_OF_HASH_OF_KEY_MISMATCH             106
 122 #define JPAKE_R_HASH_OF_KEY_MISMATCH                     107
 123 #define JPAKE_R_VERIFY_B_FAILED                          102
 124 #define JPAKE_R_VERIFY_X3_FAILED                         103
 125 #define JPAKE_R_VERIFY_X4_FAILED                         104
 126 #define JPAKE_R_ZKP_VERIFY_FAILED                        100
 127
 128 #ifdef  __cplusplus
 129 }
 130 #endif
 131 #endif