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Merge pull request #2565 from SparkiDev/rsa_kg_sp_math

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SP Math and RSA Key Gen working again
This commit is contained in:
toddouska
2019-11-06 13:08:19 -08:00
committed by GitHub
parent 1becdb9f3b 65cd8a930e
commit c137c5a3e0
2 changed files with 26 additions and 6 deletions
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30
wolfcrypt/src/sp_int.c
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@ -1067,7 +1067,7 @@ static int sp_sqrmod(sp_int* a, sp_int* m, sp_int* r)
return err;
}
#if defined(WOLFSSL_HAVE_SP_DH) && defined(WOLFSSL_KEY_GEN)
#if defined(WOLFSSL_HAVE_SP_DH) || defined(WOLFSSL_KEY_GEN)
/* Multiply a by b mod m and store in r: r = (a * b) mod m
*
* a SP integer to multiply.
@ -1077,14 +1077,32 @@ static int sp_sqrmod(sp_int* a, sp_int* m, sp_int* r)
* returns MP_VAL when m is 0, MP_MEM when dynamic memory allocation fails and
* MP_OKAY otherwise.
*/
static int sp_mulmod(sp_int* a, sp_int* b, sp_int* m, sp_int* r)
int sp_mulmod(sp_int* a, sp_int* b, sp_int* m, sp_int* r)
{
int err;
int err = MP_OKAY;
#ifdef WOLFSSL_SMALL_STACK
sp_int* t;
#else
sp_int t[1];
#endif
err = sp_mul(a, b, r);
if (err == MP_OKAY)
err = sp_mod(r, m, r);
#ifdef WOLFSSL_SMALL_STACK
t = (sp_int*)XMALLOC(sizeof(sp_int), NULL, DYNAMIC_TYPE_BIGINT);
if (t == NULL) {
err = MP_MEM;
}
#endif
if (err == MP_OKAY) {
err = sp_mul(a, b, t);
}
if (err == MP_OKAY) {
err = sp_mod(t, m, r);
}
#ifdef WOLFSSL_SMALL_STACK
if (t != NULL)
XFREE(t, NULL, DYNAMIC_TYPE_BIGINT);
#endif
return err;
}
#endif

2
wolfssl/wolfcrypt/sp_int.h
View File

@ -180,6 +180,7 @@ MP_API int sp_tohex(sp_int* a, char* str);
MP_API int sp_2expt(sp_int* a, int e);
MP_API int sp_rand_prime(sp_int* r, int len, WC_RNG* rng, void* heap);
MP_API int sp_mul(sp_int* a, sp_int* b, sp_int* r);
MP_API int sp_mulmod(sp_int* a, sp_int* b, sp_int* m, sp_int* r);
MP_API int sp_gcd(sp_int* a, sp_int* b, sp_int* r);
MP_API int sp_invmod(sp_int* a, sp_int* m, sp_int* r);
MP_API int sp_lcm(sp_int* a, sp_int* b, sp_int* r);
@ -246,6 +247,7 @@ MP_API void sp_rshb(sp_int* a, int n, sp_int* r);
#define mp_2expt sp_2expt
#define mp_rand_prime sp_rand_prime
#define mp_mul sp_mul
#define mp_mulmod sp_mulmod
#define mp_gcd sp_gcd
#define mp_invmod sp_invmod
#define mp_lcm sp_lcm