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Fix code formatting and document the fact that input arrays must be word

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aligned
This commit is contained in:
cacu
2016-03-08 09:47:02 +01:00
parent 289a8e0340
commit eff564675d
2 changed files with 16 additions and 13 deletions
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uECC.c
+12 -12
View File
@@ -161,10 +161,10 @@ static void bcopy(uint8_t *dst,
const uint8_t *src, const uint8_t *src,
unsigned num_bytes) unsigned num_bytes)
{ {
while (0 != num_bytes) { while (0 != num_bytes) {
num_bytes--; num_bytes--;
dst[num_bytes] = src[num_bytes]; dst[num_bytes] = src[num_bytes];
} }
} }
static cmpresult_t uECC_vli_cmp_unsafe(const uECC_word_t *left, static cmpresult_t uECC_vli_cmp_unsafe(const uECC_word_t *left,
@@ -996,8 +996,8 @@ int uECC_make_key(uint8_t *public_key,
uint8_t *private_key, uint8_t *private_key,
uECC_Curve curve) { uECC_Curve curve) {
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *private = (uECC_word_t *) private_key; uECC_word_t *private = (uECC_word_t *)private_key;
uECC_word_t *public = (uECC_word_t *) public_key; uECC_word_t *public = (uECC_word_t *)public_key;
#else #else
uECC_word_t private[uECC_MAX_WORDS]; uECC_word_t private[uECC_MAX_WORDS];
uECC_word_t public[uECC_MAX_WORDS * 2]; uECC_word_t public[uECC_MAX_WORDS * 2];
@@ -1082,7 +1082,7 @@ void uECC_compress(const uint8_t *public_key, uint8_t *compressed, uECC_Curve cu
void uECC_decompress(const uint8_t *compressed, uint8_t *public_key, uECC_Curve curve) { void uECC_decompress(const uint8_t *compressed, uint8_t *public_key, uECC_Curve curve) {
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *point = (uECC_word_t *) public_key; uECC_word_t *point = (uECC_word_t *)public_key;
#else #else
uECC_word_t point[uECC_MAX_WORDS * 2]; uECC_word_t point[uECC_MAX_WORDS * 2];
#endif #endif
@@ -1131,7 +1131,7 @@ int uECC_valid_point(const uECC_word_t *point, uECC_Curve curve) {
int uECC_valid_public_key(const uint8_t *public_key, uECC_Curve curve) { int uECC_valid_public_key(const uint8_t *public_key, uECC_Curve curve) {
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *public = (uECC_word_t *) public_key; uECC_word_t *public = (uECC_word_t *)public_key;
#else #else
uECC_word_t public[uECC_MAX_WORDS * 2]; uECC_word_t public[uECC_MAX_WORDS * 2];
#endif #endif
@@ -1146,8 +1146,8 @@ int uECC_valid_public_key(const uint8_t *public_key, uECC_Curve curve) {
int uECC_compute_public_key(const uint8_t *private_key, uint8_t *public_key, uECC_Curve curve) { int uECC_compute_public_key(const uint8_t *private_key, uint8_t *public_key, uECC_Curve curve) {
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *private = (uECC_word_t *) private_key; uECC_word_t *private = (uECC_word_t *)private_key;
uECC_word_t *public = (uECC_word_t *) public_key; uECC_word_t *public = (uECC_word_t *)public_key;
#else #else
uECC_word_t private[uECC_MAX_WORDS]; uECC_word_t private[uECC_MAX_WORDS];
uECC_word_t public[uECC_MAX_WORDS * 2]; uECC_word_t public[uECC_MAX_WORDS * 2];
@@ -1231,7 +1231,7 @@ static int uECC_sign_with_k(const uint8_t *private_key,
uECC_word_t s[uECC_MAX_WORDS]; uECC_word_t s[uECC_MAX_WORDS];
uECC_word_t *k2[2] = {tmp, s}; uECC_word_t *k2[2] = {tmp, s};
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *p = (uECC_word_t *) signature; uECC_word_t *p = (uECC_word_t *)signature;
#else #else
uECC_word_t p[uECC_MAX_WORDS * 2]; uECC_word_t p[uECC_MAX_WORDS * 2];
#endif #endif
@@ -1460,7 +1460,7 @@ int uECC_verify(const uint8_t *public_key,
bitcount_t num_bits; bitcount_t num_bits;
bitcount_t i; bitcount_t i;
#if uECC_VLI_NATIVE_LITTLE_ENDIAN #if uECC_VLI_NATIVE_LITTLE_ENDIAN
uECC_word_t *public = (uECC_word_t *) public_key; uECC_word_t *public = (uECC_word_t *)public_key;
#else #else
uECC_word_t public[uECC_MAX_WORDS * 2]; uECC_word_t public[uECC_MAX_WORDS * 2];
#endif #endif
uECC.h
+4 -1
View File
@@ -39,7 +39,10 @@ faster somewhat faster, but increases the code size. */
little-endian format for *all* arrays passed in and out of the public API. This includes public little-endian format for *all* arrays passed in and out of the public API. This includes public
and private keys, shared secrets, signatures and message hashes. and private keys, shared secrets, signatures and message hashes.
Using this switch reduces the amount of call stack memory used by uECC, since less intermediate Using this switch reduces the amount of call stack memory used by uECC, since less intermediate
translations are required. Note that this will *only* work on native little-endian processors. */ translations are required.
Note that this will *only* work on native little-endian processors and it will treat the uint8_t
arrays passed into the public API as word arrays, therefore requiring the provided byte arrays
to be word aligned on architectures that do not support unaligned accesses. */
#ifndef uECC_VLI_NATIVE_LITTLE_ENDIAN #ifndef uECC_VLI_NATIVE_LITTLE_ENDIAN
#define uECC_VLI_NATIVE_LITTLE_ENDIAN 0 #define uECC_VLI_NATIVE_LITTLE_ENDIAN 0
#endif #endif