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md5 reduce malloc

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源文雨
2022-04-04 15:25:55 +08:00
parent 634b4c1426
commit 740276005f
2 changed files with 3 additions and 4 deletions
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5
md5.c
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@@ -61,7 +61,7 @@ static uint32_t to_int32(const uint8_t *bytes) {
return val; return val;
} }
uint8_t* md5(const uint8_t *data, size_t data_len) { uint8_t* md5(const uint8_t *data, size_t data_len, uint8_t digest[16]) {
// These vars will contain the hash // These vars will contain the hash
uint32_t h0, h1, h2, h3; uint32_t h0, h1, h2, h3;
@@ -149,12 +149,11 @@ uint8_t* md5(const uint8_t *data, size_t data_len) {
free(msg); free(msg);
//var char digest[16] := h0 append h1 append h2 append h3 //(Output is in little-endian) //var char digest[16] := h0 append h1 append h2 append h3 //(Output is in little-endian)
uint8_t *digest = (uint8_t*)malloc(16*sizeof(char));
to_bytes(h0, digest); to_bytes(h0, digest);
to_bytes(h1, digest + 4); to_bytes(h1, digest + 4);
to_bytes(h2, digest + 8); to_bytes(h2, digest + 8);
to_bytes(h3, digest + 12); to_bytes(h3, digest + 12);
return digest; return (uint8_t*)digest;
} }
#ifdef TEST_SIMPLE_CRYPTO #ifdef TEST_SIMPLE_CRYPTO

2
simplecrypto.h
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@@ -6,7 +6,7 @@
// ---------------MD5 area--------------- // ---------------MD5 area---------------
// return 128bit(16bytes) digest // return 128bit(16bytes) digest
uint8_t* md5(const uint8_t *data, size_t data_len); uint8_t* md5(const uint8_t *data, size_t data_len, uint8_t digest[16]);
// ---------------MD5 area--------------- // ---------------MD5 area---------------