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-rw-r--r--aesxx/utils/decrypt_block.cpp247
1 files changed, 100 insertions, 147 deletions
diff --git a/aesxx/utils/decrypt_block.cpp b/aesxx/utils/decrypt_block.cpp
index 02a3033..42e496e 100644
--- a/aesxx/utils/decrypt_block.cpp
+++ b/aesxx/utils/decrypt_block.cpp
@@ -16,198 +16,151 @@
#include <stdexcept>
#include <string>
-namespace
-{
- template <aes::Algorithm algorithm, aes::Mode mode>
- void decrypt_with_mode(
- const Input& input,
- bool verbose = false)
- {
- typename aes::Types<algorithm>::Block iv;
+namespace {
- if (aes::ModeRequiresInitVector<mode>())
- {
- aes::from_string<algorithm>(iv, input.iv);
- if (verbose)
- dump_iv<algorithm>(iv);
- }
+template <aes::Algorithm algorithm, aes::Mode mode>
+void decrypt_with_mode(const Input& input, bool verbose = false) {
+ typename aes::Types<algorithm>::Block iv;
- typename aes::Types<algorithm>::Key key;
- aes::from_string<algorithm>(key, input.key);
+ if (aes::ModeRequiresInitVector<mode>()) {
+ aes::from_string<algorithm>(iv, input.iv);
if (verbose)
- dump_key<algorithm>(key);
+ dump_iv<algorithm>(iv);
+ }
- aes::DecryptWrapper<algorithm, mode> decrypt{key, iv};
- if (verbose)
- dump_wrapper<algorithm, mode>(decrypt);
+ typename aes::Types<algorithm>::Key key;
+ aes::from_string<algorithm>(key, input.key);
+ if (verbose)
+ dump_key<algorithm>(key);
- for (const auto& block : input.blocks)
- {
- typename aes::Types<algorithm>::Block ciphertext, plaintext;
- aes::from_string<algorithm>(ciphertext, block);
+ aes::DecryptWrapper<algorithm, mode> decrypt{key, iv};
+ if (verbose)
+ dump_wrapper<algorithm, mode>(decrypt);
- decrypt.decrypt_block(ciphertext, plaintext);
+ for (const auto& block : input.blocks) {
+ typename aes::Types<algorithm>::Block ciphertext, plaintext;
+ aes::from_string<algorithm>(ciphertext, block);
- if (verbose)
- {
- dump_ciphertext<algorithm>(ciphertext);
- dump_plaintext<algorithm>(plaintext);
- dump_next_iv<algorithm, mode>(decrypt);
- }
- else
- {
- std::cout << aes::to_string<algorithm>(plaintext) << '\n';
- }
+ decrypt.decrypt_block(ciphertext, plaintext);
+
+ if (verbose) {
+ dump_ciphertext<algorithm>(ciphertext);
+ dump_plaintext<algorithm>(plaintext);
+ dump_next_iv<algorithm, mode>(decrypt);
+ } else {
+ std::cout << aes::to_string<algorithm>(plaintext) << '\n';
}
}
+}
- template <aes::Algorithm algorithm>
- void decrypt_with_algorithm(
- aes::Mode mode,
- const Input& input,
- bool verbose = false)
- {
- switch (mode)
- {
- case AES_ECB:
- decrypt_with_mode<algorithm, AES_ECB>(input, verbose);
- break;
+template <aes::Algorithm algorithm>
+void decrypt_with_algorithm(aes::Mode mode, const Input& input, bool verbose = false) {
+ switch (mode) {
+ case AES_ECB:
+ decrypt_with_mode<algorithm, AES_ECB>(input, verbose);
+ break;
- case AES_CBC:
- decrypt_with_mode<algorithm, AES_CBC>(input, verbose);
- break;
+ case AES_CBC:
+ decrypt_with_mode<algorithm, AES_CBC>(input, verbose);
+ break;
- case AES_CFB:
- decrypt_with_mode<algorithm, AES_CFB>(input, verbose);
- break;
+ case AES_CFB:
+ decrypt_with_mode<algorithm, AES_CFB>(input, verbose);
+ break;
- case AES_OFB:
- decrypt_with_mode<algorithm, AES_OFB>(input, verbose);
- break;
+ case AES_OFB:
+ decrypt_with_mode<algorithm, AES_OFB>(input, verbose);
+ break;
- case AES_CTR:
- decrypt_with_mode<algorithm, AES_CTR>(input, verbose);
- break;
+ case AES_CTR:
+ decrypt_with_mode<algorithm, AES_CTR>(input, verbose);
+ break;
- default:
- throw std::runtime_error("the selected mode of operation is not implemented");
- break;
- }
+ default:
+ throw std::runtime_error("the selected mode of operation is not implemented");
+ break;
}
+}
- void decrypt_using_cxx_api(
- aes::Algorithm algorithm,
- aes::Mode mode,
- const Input& input,
- bool verbose = false)
- {
- switch (algorithm)
- {
- case AES_AES128:
- decrypt_with_algorithm<AES_AES128>(mode, input, verbose);
- break;
+void decrypt_using_cxx_api(aes::Algorithm algorithm,
+ aes::Mode mode,
+ const Input& input,
+ bool verbose = false) {
+ switch (algorithm) {
+ case AES_AES128:
+ decrypt_with_algorithm<AES_AES128>(mode, input, verbose);
+ break;
- case AES_AES192:
- decrypt_with_algorithm<AES_AES192>(mode, input, verbose);
- break;
+ case AES_AES192:
+ decrypt_with_algorithm<AES_AES192>(mode, input, verbose);
+ break;
- case AES_AES256:
- decrypt_with_algorithm<AES_AES256>(mode, input, verbose);
- break;
+ case AES_AES256:
+ decrypt_with_algorithm<AES_AES256>(mode, input, verbose);
+ break;
- default:
- throw std::runtime_error("the selected algorithm is not implemented");
- break;
- }
+ default:
+ throw std::runtime_error("the selected algorithm is not implemented");
+ break;
}
+}
- void decrypt_using_particular_box(
- aes::Box& box,
- const std::vector<std::string>& blocks)
- {
- for (const auto& block : blocks)
- {
- aes::Box::Block ciphertext;
- box.parse_block(ciphertext, block);
+void decrypt_using_particular_box(aes::Box& box, const std::vector<std::string>& blocks) {
+ for (const auto& block : blocks) {
+ aes::Box::Block ciphertext;
+ box.parse_block(ciphertext, block);
- aes::Box::Block plaintext;
- box.decrypt_block(ciphertext, plaintext);
- std::cout << box.format_block(plaintext) << '\n';
- }
+ aes::Box::Block plaintext;
+ box.decrypt_block(ciphertext, plaintext);
+ std::cout << box.format_block(plaintext) << '\n';
}
+}
- void decrypt_using_boxes(
- aes::Algorithm algorithm,
- aes::Mode mode,
- const Input& input)
- {
- aes::Box::Key key;
- aes::Box::parse_key(key, algorithm, input.key);
+void decrypt_using_boxes(aes::Algorithm algorithm, aes::Mode mode, const Input& input) {
+ aes::Box::Key key;
+ aes::Box::parse_key(key, algorithm, input.key);
- if (aes::mode_requires_init_vector(mode))
- {
- aes::Box::Block iv;
- aes::Box::parse_block(iv, algorithm, input.iv);
- aes::Box box{algorithm, key, mode, iv};
+ if (aes::mode_requires_init_vector(mode)) {
+ aes::Box::Block iv;
+ aes::Box::parse_block(iv, algorithm, input.iv);
+ aes::Box box{algorithm, key, mode, iv};
- decrypt_using_particular_box(box, input.blocks);
- }
- else
- {
- aes::Box box{algorithm, key};
- decrypt_using_particular_box(box, input.blocks);
- }
+ decrypt_using_particular_box(box, input.blocks);
+ } else {
+ aes::Box box{algorithm, key};
+ decrypt_using_particular_box(box, input.blocks);
}
}
-int main(int argc, char** argv)
-{
- try
- {
+} // namespace
+
+int main(int argc, char** argv) {
+ try {
BlockSettings settings{argv[0]};
- try
- {
+ try {
settings.parse(argc, argv);
- }
- catch (const boost::program_options::error& e)
- {
+ } catch (const boost::program_options::error& e) {
settings.usage_error(e);
return 1;
}
- if (settings.exit_with_usage)
- {
+ if (settings.exit_with_usage) {
settings.usage();
return 0;
}
- for (const auto& input : settings.inputs)
- {
- if (settings.use_boxes)
- {
- decrypt_using_boxes(
- settings.algorithm,
- settings.mode,
- input);
- }
- else
- {
- decrypt_using_cxx_api(
- settings.algorithm,
- settings.mode,
- input,
- settings.verbose);
+ for (const auto& input : settings.inputs) {
+ if (settings.use_boxes) {
+ decrypt_using_boxes(settings.algorithm, settings.mode, input);
+ } else {
+ decrypt_using_cxx_api(settings.algorithm, settings.mode, input, settings.verbose);
}
}
- }
- catch (const aes::Error& e)
- {
+ } catch (const aes::Error& e) {
std::cerr << e;
return 1;
- }
- catch (const std::exception& e)
- {
+ } catch (const std::exception& e) {
std::cerr << e.what() << "\n";
return 1;
}
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