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decrease RAM usage using PROGMEM

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This commit is contained in:
AndreiD
2017-02-19 14:53:17 +02:00
committed by Ivan Grokhotkov
parent 8afe55267a
commit feed1ca219
9 changed files with 103 additions and 35 deletions
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11
crypto/md5.c
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@@ -60,7 +60,7 @@ static void MD5Transform(uint32_t state[4], const uint8_t block[64]);
static void Encode(uint8_t *output, uint32_t *input, uint32_t len);
static void Decode(uint32_t *output, const uint8_t *input, uint32_t len);
static const uint8_t PADDING[64] =
static const uint8_t PADDING[64] PROGMEM =
{
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -158,7 +158,10 @@ EXP_FUNC void STDCALL MD5_Final(uint8_t *digest, MD5_CTX *ctx)
{
uint8_t bits[8];
uint32_t x, padLen;
#ifdef WITH_PGM_READ_HELPER
uint8_t PADDING_stack[64];
memcpy(PADDING_stack, PADDING, 64);
#endif
/* Save number of bits */
Encode(bits, ctx->count, 8);
@@ -166,7 +169,11 @@ EXP_FUNC void STDCALL MD5_Final(uint8_t *digest, MD5_CTX *ctx)
*/
x = (uint32_t)((ctx->count[0] >> 3) & 0x3f);
padLen = (x < 56) ? (56 - x) : (120 - x);
#ifdef WITH_PGM_READ_HELPER
MD5_Update(ctx, PADDING_stack, padLen);
#else
MD5_Update(ctx, PADDING, padLen);
#endif
/* Append length (before padding) */
MD5_Update(ctx, bits, 8);