OpenSoure_Repos/TheAlgorithms-C-Plus-Plus
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fix: Apply suggestions from code review

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Co-authored-by: Piotr Idzik <65706193+vil02@users.noreply.github.com>
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Md. Anisul Haque 2023-05-24 14:36:32 +05:30 committed by GitHub
parent 53c0f6bcc1
commit a3d7333993
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 14 deletions
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20
hashing/sha256.cpp
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@ -37,13 +37,10 @@ namespace sha256 {
* @return size_t Size of the padded input
*/
std::size_t compute_padded_size(const std::size_t input_size) {
size_t padded_input_size = 0;
if (input_size % 64 < 56) {
padded_input_size = input_size + 64 - (input_size % 64);
} else {
padded_input_size = input_size + 128 - (input_size % 64);
return input_size + 64 - (input_size % 64);
}
return padded_input_size;
return input_size + 128 - (input_size % 64);
}
/**
@ -63,19 +60,19 @@ uint8_t extract_byte(const std::size_t in_value, const std::size_t byte_num) {
* @return char Character at the index pos in the padded string
*/
char get_char(const std::string &input, std::size_t pos) {
size_t input_size = input.length();
size_t padded_input_size = compute_padded_size(input_size);
const auto input_size = input.length();
if (pos < input_size) {
return input[pos];
}
if (pos == input_size) {
return '\x80';
}
const auto padded_input_size = compute_padded_size(input_size);
if (pos < padded_input_size - 8) {
return '\x00';
}
return static_cast<char>(
extract_byte(input_size * 8, padded_input_size - pos - 1));
extract_byte(input_size*8, padded_input_size - pos-1));
}
/**
@ -115,13 +112,8 @@ std::array<uint32_t, 8> compute_hash(const std::string &input) {
0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2};
size_t input_size = input.length(); ///< Input size in bytes
size_t padded_input_size =
compute_padded_size(input_size); ///< Padded input size in bytes
// Process message in successive 512-bit (64-byte) chunks
for (size_t i = 0; i < padded_input_size; i += 64) {
for (size_t i = 0; i < compute_padded_size(input.length()); i += 64) {
std::array<uint32_t, 64> blocks{};
// Copy chunk into first 16 words of the message schedule array