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add ECC helpers to get size and id from curve name

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This commit is contained in:
Chris Conlon 2017-03-30 11:12:53 -06:00
parent 14efd9735d
commit 61d82790e4
3 changed files with 120 additions and 0 deletions
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57
tests/api.c
View File

@ -3075,6 +3075,59 @@ static void test_wc_GetPkcs8TraditionalOffset(void)
}
/*----------------------------------------------------------------------------*
| wolfCrypt ECC
*----------------------------------------------------------------------------*/
static void test_wc_ecc_get_curve_size_from_name(void)
{
#ifdef HAVE_ECC
int ret;
printf(testingFmt, "wc_ecc_get_curve_size_from_name");
#if !defined(NO_ECC256) && !defined(NO_ECC_SECP)
ret = wc_ecc_get_curve_size_from_name("SECP256R1");
AssertIntEQ(ret, 32);
#endif
/* invalid case */
ret = wc_ecc_get_curve_size_from_name("BADCURVE");
AssertIntEQ(ret, -1);
/* NULL input */
ret = wc_ecc_get_curve_size_from_name(NULL);
AssertIntEQ(ret, BAD_FUNC_ARG);
printf(resultFmt, passed);
#endif /* HAVE_ECC */
}
static void test_wc_ecc_get_curve_id_from_name(void)
{
#ifdef HAVE_ECC
int id;
printf(testingFmt, "wc_ecc_get_curve_id_from_name");
#if !defined(NO_ECC256) && !defined(NO_ECC_SECP)
id = wc_ecc_get_curve_id_from_name("SECP256R1");
AssertIntEQ(id, ECC_SECP256R1);
#endif
/* invalid case */
id = wc_ecc_get_curve_id_from_name("BADCURVE");
AssertIntEQ(id, -1);
/* NULL input */
id = wc_ecc_get_curve_id_from_name(NULL);
AssertIntEQ(id, BAD_FUNC_ARG);
printf(resultFmt, passed);
#endif /* HAVE_ECC */
}
/*----------------------------------------------------------------------------*
| Main
*----------------------------------------------------------------------------*/
@ -3139,6 +3192,10 @@ void ApiTest(void)
/* wolfCrypt ASN tests */
test_wc_GetPkcs8TraditionalOffset();
/* wolfCrypt ECC tests */
test_wc_ecc_get_curve_size_from_name();
test_wc_ecc_get_curve_id_from_name();
printf(" End API Tests\n");
}

59
wolfcrypt/src/ecc.c
View File

@ -2490,6 +2490,65 @@ int wc_ecc_get_curve_size_from_id(int curve_id)
return ecc_sets[curve_idx].size;
}
/* Returns the curve size that corresponds to a given curve name,
* as listed in ecc_sets[] of ecc.c.
*
* name curve name, from ecc_sets[].name in ecc.c
* return curve size, from ecc_sets[] on success, negative on error
*/
int wc_ecc_get_curve_size_from_name(const char* curveName)
{
int x;
if (curveName == NULL)
return BAD_FUNC_ARG;
/* find curve from name */
for (x = 0; ecc_sets[x].size != 0; x++) {
if (XSTRNCMP(ecc_sets[x].name, curveName,
XSTRLEN(curveName)) == 0) {
break;
}
}
if (ecc_sets[x].size == 0) {
WOLFSSL_MSG("ecc_set curve name not found");
return -1;
}
/* will be 0 if not found */
return ecc_sets[x].size;
}
/* Returns the curve id that corresponds to a given curve name,
* as listed in ecc_sets[] of ecc.c.
*
* name curve name, from ecc_sets[].name in ecc.c
* return curve id, from ecc_sets[] on success, negative on error
*/
int wc_ecc_get_curve_id_from_name(const char* curveName)
{
int x;
if (curveName == NULL)
return BAD_FUNC_ARG;
/* find curve from name */
for (x = 0; ecc_sets[x].size != 0; x++) {
if (XSTRNCMP(ecc_sets[x].name, curveName,
XSTRLEN(curveName)) == 0) {
break;
}
}
if (ecc_sets[x].size == 0) {
WOLFSSL_MSG("ecc_set curve name not found");
}
/* will be -1 if not found */
return ecc_sets[x].id;
}
#ifdef HAVE_ECC_DHE
/**

4
wolfssl/wolfcrypt/ecc.h
View File

@ -369,6 +369,10 @@ int wc_ecc_get_curve_id(int curve_idx);
#define wc_ecc_get_curve_name_from_id wc_ecc_get_name
WOLFSSL_API
int wc_ecc_get_curve_size_from_id(int curve_id);
WOLFSSL_API
int wc_ecc_get_curve_size_from_name(const char* curveName);
WOLFSSL_API
int wc_ecc_get_curve_id_from_name(const char* curveName);
#ifndef WOLFSSL_ATECC508A