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Merge pull request #1694 from SparkiDev/stack_ecc

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Small stack support in ECC
This commit is contained in:
John Safranek
2018-07-18 08:57:35 -07:00
committed by GitHub
parent ebdfe9715e e6c22fbd85
commit 17d5b6a42b
2 changed files with 1052 additions and 293 deletions
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1306
wolfcrypt/src/ecc.c
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25
wolfssl/wolfcrypt/ecc.h
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@@ -135,6 +135,9 @@ enum {
ECC_POINT_COMP_EVEN = 0x02, ECC_POINT_COMP_EVEN = 0x02,
ECC_POINT_COMP_ODD = 0x03, ECC_POINT_COMP_ODD = 0x03,
ECC_POINT_UNCOMP = 0x04, ECC_POINT_UNCOMP = 0x04,
/* Shamir's dual add constants */
SHAMIR_PRECOMP_SZ = 16,
}; };
/* Curve Types */ /* Curve Types */
@@ -301,6 +304,11 @@ typedef struct alt_fp_int {
} alt_fp_int; } alt_fp_int;
#endif /* ALT_ECC_SIZE */ #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) => /* 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 */ (x/z^2, y/z^3, 1) when interpreted as affine */
@@ -315,6 +323,9 @@ typedef struct {
mp_int* z; /* The z coordinate */ mp_int* z; /* The z coordinate */
alt_fp_int xyz[3]; alt_fp_int xyz[3];
#endif #endif
#ifdef WOLFSSL_SMALL_STACK_CACHE
ecc_key* key;
#endif
} ecc_point; } ecc_point;
/* ECC Flags */ /* ECC Flags */
@@ -360,12 +371,16 @@ struct ecc_key {
CertSignCtx certSignCtx; /* context info for cert sign (MakeSignature) */ CertSignCtx certSignCtx; /* context info for cert sign (MakeSignature) */
#endif #endif
#endif /* WOLFSSL_ASYNC_CRYPT */ #endif /* WOLFSSL_ASYNC_CRYPT */
}; #ifdef WOLFSSL_SMALL_STACK_CACHE
mp_int* t1;
#ifndef WC_ECCKEY_TYPE_DEFINED mp_int* t2;
typedef struct ecc_key ecc_key; #ifdef ALT_ECC_SIZE
#define WC_ECCKEY_TYPE_DEFINED mp_int* x;
mp_int* y;
mp_int* z;
#endif #endif
#endif
};
/* ECC predefined curve sets */ /* ECC predefined curve sets */