diff options
Diffstat (limited to 'src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp')
-rw-r--r-- | src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp b/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp deleted file mode 100644 index e65114c880..0000000000 --- a/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp +++ /dev/null @@ -1,203 +0,0 @@ -/* -* CBC Padding Methods -* (C) 1999-2007,2013,2018 Jack Lloyd -* (C) 2016 René Korthaus, Rohde & Schwarz Cybersecurity -* -* Botan is released under the Simplified BSD License (see license.txt) -*/ - -#include <botan/mode_pad.h> -#include <botan/exceptn.h> -#include <botan/internal/ct_utils.h> - -namespace Botan { - -/** -* Get a block cipher padding method by name -*/ -BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec) - { - if(algo_spec == "NoPadding") - return new Null_Padding; - - if(algo_spec == "PKCS7") - return new PKCS7_Padding; - - if(algo_spec == "OneAndZeros") - return new OneAndZeros_Padding; - - if(algo_spec == "X9.23") - return new ANSI_X923_Padding; - - if(algo_spec == "ESP") - return new ESP_Padding; - - return nullptr; - } - -/* -* Pad with PKCS #7 Method -*/ -void PKCS7_Padding::add_padding(secure_vector<uint8_t>& buffer, - size_t last_byte_pos, - size_t block_size) const - { - const uint8_t pad_value = static_cast<uint8_t>(block_size - last_byte_pos); - - for(size_t i = 0; i != pad_value; ++i) - buffer.push_back(pad_value); - } - -/* -* Unpad with PKCS #7 Method -*/ -size_t PKCS7_Padding::unpad(const uint8_t input[], size_t input_length) const - { - if(input_length <= 2) - return input_length; - - CT::poison(input, input_length); - size_t bad_input = 0; - const uint8_t last_byte = input[input_length-1]; - - bad_input |= CT::expand_mask<size_t>(last_byte > input_length); - - const size_t pad_pos = input_length - last_byte; - - for(size_t i = 0; i != input_length - 1; ++i) - { - const uint8_t in_range = CT::expand_mask<uint8_t>(i >= pad_pos); - bad_input |= in_range & (~CT::is_equal(input[i], last_byte)); - } - - CT::unpoison(input, input_length); - return CT::conditional_return(bad_input, input_length, pad_pos); - } - -/* -* Pad with ANSI X9.23 Method -*/ -void ANSI_X923_Padding::add_padding(secure_vector<uint8_t>& buffer, - size_t last_byte_pos, - size_t block_size) const - { - const uint8_t pad_value = static_cast<uint8_t>(block_size - last_byte_pos); - - for(size_t i = last_byte_pos; i < block_size-1; ++i) - { - buffer.push_back(0); - } - buffer.push_back(pad_value); - } - -/* -* Unpad with ANSI X9.23 Method -*/ -size_t ANSI_X923_Padding::unpad(const uint8_t input[], size_t input_length) const - { - if(input_length <= 2) - return input_length; - - CT::poison(input, input_length); - const size_t last_byte = input[input_length-1]; - - uint8_t bad_input = 0; - bad_input |= CT::expand_mask<uint8_t>(last_byte > input_length); - - const size_t pad_pos = input_length - last_byte; - - for(size_t i = 0; i != input_length - 1; ++i) - { - const uint8_t in_range = CT::expand_mask<uint8_t>(i >= pad_pos); - bad_input |= CT::expand_mask(input[i]) & in_range; - } - - CT::unpoison(input, input_length); - return CT::conditional_return(bad_input, input_length, pad_pos); - } - -/* -* Pad with One and Zeros Method -*/ -void OneAndZeros_Padding::add_padding(secure_vector<uint8_t>& buffer, - size_t last_byte_pos, - size_t block_size) const - { - buffer.push_back(0x80); - - for(size_t i = last_byte_pos + 1; i % block_size; ++i) - buffer.push_back(0x00); - } - -/* -* Unpad with One and Zeros Method -*/ -size_t OneAndZeros_Padding::unpad(const uint8_t input[], size_t input_length) const - { - if(input_length <= 2) - return input_length; - - CT::poison(input, input_length); - - uint8_t bad_input = 0; - uint8_t seen_one = 0; - size_t pad_pos = input_length - 1; - size_t i = input_length; - - while(i) - { - seen_one |= CT::is_equal<uint8_t>(input[i-1], 0x80); - pad_pos -= CT::select<uint8_t>(~seen_one, 1, 0); - bad_input |= ~CT::is_zero<uint8_t>(input[i-1]) & ~seen_one; - i--; - } - bad_input |= ~seen_one; - - CT::unpoison(input, input_length); - return CT::conditional_return(bad_input, input_length, pad_pos); - } - -/* -* Pad with ESP Padding Method -*/ -void ESP_Padding::add_padding(secure_vector<uint8_t>& buffer, - size_t last_byte_pos, - size_t block_size) const - { - uint8_t pad_value = 0x01; - - for(size_t i = last_byte_pos; i < block_size; ++i) - { - buffer.push_back(pad_value++); - } - } - -/* -* Unpad with ESP Padding Method -*/ -size_t ESP_Padding::unpad(const uint8_t input[], size_t input_length) const - { - if(input_length <= 2) - return input_length; - - CT::poison(input, input_length); - - const size_t last_byte = input[input_length-1]; - uint8_t bad_input = 0; - bad_input |= CT::is_zero(last_byte) | CT::expand_mask<uint8_t>(last_byte > input_length); - - const size_t pad_pos = input_length - last_byte; - size_t i = input_length - 1; - while(i) - { - const uint8_t in_range = CT::expand_mask<uint8_t>(i > pad_pos); - bad_input |= (~CT::is_equal<uint8_t>(input[i-1], input[i]-1)) & in_range; - --i; - } - - CT::unpoison(input, input_length); - return CT::conditional_return(bad_input, input_length, pad_pos); - } - - -} |