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csrp-gmp
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Add easier way to debug 

You only have to change the defines now to debug, not modify the code itself.
master
est31 2015-04-23 02:17:22 +02:00
parent 84bccc73e3
commit f4f75901d5
1 changed files with 16 additions and 0 deletions
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16
srp.c
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@ -41,6 +41,8 @@
#include "srp.h"
#define srp_dbg_data(data, datalen, prevtext) ;
static int g_initialized = 0;
#define RAND_BUFF_MAX 128
@ -371,6 +373,9 @@ static int calculate_x( mpz_t result, SRP_HashAlgorithm alg, const unsigned char
hash_init( alg, &ctx );
srp_dbg_data((char*) username, strlen(username), "Username for x: ");
srp_dbg_data((char*) password, password_len, "Password for x: ");
hash_update( alg, &ctx, username, strlen(username) );
hash_update( alg, &ctx, ":", 1 );
hash_update( alg, &ctx, password, password_len );
@ -496,6 +501,7 @@ static void init_random()
g_initialized = fill_buff();
}
#define srp_dbg_num(num, text) ;
/***********************************************************************************************************
*
@ -530,6 +536,8 @@ void srp_create_salted_verification_key( SRP_HashAlgorithm alg,
if( !calculate_x( x, alg, *bytes_s, *len_s, username_for_verifier, password, len_password ))
goto cleanup_and_exit;
srp_dbg_num(x, "Server calculated x: ");
mpz_powm(v, ng->g, x, ng->N);
*len_v = mpz_num_bytes(v);
@ -627,6 +635,8 @@ struct SRPVerifier * srp_verifier_new( SRP_HashAlgorithm alg, SRP_NGType ng_typ
goto cleanup_and_exit;
}
srp_dbg_num(u, "Server calculated u: ");
/* S = (A *(v^u)) ^ b */
mpz_powm(tmp1, v, u, ng->N);
mpz_mulm(tmp2, A, tmp1, ng->N, tmp3);
@ -898,9 +908,13 @@ void srp_user_process_challenge( struct SRPUser * usr,
if (!H_nn(u, usr->hash_alg, usr->ng->N, usr->A, B))
goto cleanup_and_exit;
srp_dbg_num(u, "Client calculated u: ");
if (!calculate_x( x, usr->hash_alg, bytes_s, len_s, usr->username_verifier, usr->password, usr->password_len ))
goto cleanup_and_exit;
srp_dbg_num(x, "Client calculated x: ");
if (!H_nn(k, usr->hash_alg, usr->ng->N, usr->ng->N, usr->ng->g))
goto cleanup_and_exit;
@ -909,6 +923,8 @@ void srp_user_process_challenge( struct SRPUser * usr,
{
mpz_powm(v, usr->ng->g, x, usr->ng->N);
srp_dbg_num(v, "Client calculated v: ");
/* S = (B - k*(g^x)) ^ (a + ux) */
mpz_mul(tmp1, u, x);
mpz_add(tmp2, usr->a, tmp1); /* tmp2 = (a + ux) */