wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2025-07-29 18:27:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

Small stack support in ECC

Browse Source 
Small stack builds now dynamically allocate large stack variables.
Cache option added to avoid repeated allocation of temporaries in add
points, double point and map.
Cached memory allocated in mulmod and mul2add.
This commit is contained in:
Sean Parkinson
2018-07-17 10:18:05 +10:00
parent f0422bec41
commit e6c22fbd85
2 changed files with 1052 additions and 293 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1320
wolfcrypt/src/ecc.c
View File

File diff suppressed because it is too large Load Diff

25
wolfssl/wolfcrypt/ecc.h
View File

@ -135,6 +135,9 @@ enum {
ECC_POINT_COMP_EVEN = 0x02,
ECC_POINT_COMP_ODD = 0x03,
ECC_POINT_UNCOMP = 0x04,
/* Shamir's dual add constants */
SHAMIR_PRECOMP_SZ = 16,
};
/* Curve Types */
@ -301,6 +304,11 @@ typedef struct alt_fp_int {
} alt_fp_int;
#endif /* ALT_ECC_SIZE */
#ifndef WC_ECCKEY_TYPE_DEFINED
typedef struct ecc_key ecc_key;
#define WC_ECCKEY_TYPE_DEFINED
#endif
/* A point on an ECC curve, stored in Jacbobian format such that (x,y,z) =>
(x/z^2, y/z^3, 1) when interpreted as affine */
@ -315,6 +323,9 @@ typedef struct {
mp_int* z; /* The z coordinate */
alt_fp_int xyz[3];
#endif
#ifdef WOLFSSL_SMALL_STACK_CACHE
ecc_key* key;
#endif
} ecc_point;
/* ECC Flags */
@ -360,12 +371,16 @@ struct ecc_key {
CertSignCtx certSignCtx; /* context info for cert sign (MakeSignature) */
#endif
#endif /* WOLFSSL_ASYNC_CRYPT */
};
#ifndef WC_ECCKEY_TYPE_DEFINED
typedef struct ecc_key ecc_key;
#define WC_ECCKEY_TYPE_DEFINED
#ifdef WOLFSSL_SMALL_STACK_CACHE
mp_int* t1;
mp_int* t2;
#ifdef ALT_ECC_SIZE
mp_int* x;
mp_int* y;
mp_int* z;
#endif
#endif
};
/* ECC predefined curve sets */