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Showing content from https://github.com/awslabs/aws-c-cal below:

awslabs/aws-c-cal: Aws Crypto Abstraction Layer: Cross-Platform, C99 wrapper for cryptography primitives.

AWS Crypto Abstraction Layer: Cross-Platform, C99 wrapper for cryptography primitives.

This library is licensed under the Apache 2.0 License.

Windows (Vista and Later)
Apple (MacOS 10.15+, IOS 11+)
Unix (via OpenSSL compatible libcrypto)

CMake 3.9+ is required to build.

<install-path> must be an absolute path in the following instructions.

If you are building on Linux, there are several options for crypto libraries. Preferred choice is aws-lc, that can be build as follows.

git clone git@github.com:awslabs/aws-lc.git
cmake -S aws-lc -B aws-lc/build -DCMAKE_INSTALL_PREFIX=<install-path>
cmake --build aws-lc/build --target install

Alternatively, OpenSSL versions 1.0.2 or 1.1.1 or BoringSSL at commit 9939e14 (other commits are not tested and not guaranteed to work) can be used. To build against OpenSSL or BoringSSL specify -DUSE_OPENSSL=ON. Typical OpenSSL flags can be used to help project locate artifacts (-DLibCrypto_INCLUDE_DIR and -DLibCrypto_STATIC_LIBRARY)

Building aws-c-cal and Remaining Dependencies

git clone git@github.com:awslabs/aws-c-common.git
cmake -S aws-c-common -B aws-c-common/build -DCMAKE_INSTALL_PREFIX=<install-path>
cmake --build aws-c-common/build --target install

git clone git@github.com:awslabs/aws-c-cal.git
cmake -S aws-c-cal -B aws-c-cal/build -DCMAKE_INSTALL_PREFIX=<install-path> -DCMAKE_PREFIX_PATH=<install-path>
cmake --build aws-c-cal/build --target install

Currently provided algorithms

struct aws_hash *hash = aws_md5_new(allocator);
aws_hash_update(hash, &your_buffer);
aws_hash_finalize(hash, &output_buffer, 0);
aws_hash_destroy(hash);

aws_md5_compute(allocator, &your_buffer, &output_buffer, 0);

struct aws_hash *hash = aws_sha256_new(allocator);
aws_hash_update(hash, &your_buffer);
aws_hash_finalize(hash, &output_buffer, 0);
aws_hash_destroy(hash);

aws_sha256_compute(allocator, &your_buffer, &output_buffer, 0);

struct aws_hmac *hmac = aws_sha256_hmac_new(allocator, &secret_buf);
aws_hmac_update(hmac, &your_buffer);
aws_hmac_finalize(hmac, &output_buffer, 0);
aws_hmac_destroy(hmac);

aws_sha256_hmac_compute(allocator, &secret_buf, &your_buffer, &output_buffer, 0);

I want more algorithms, what do I do?

Great! So do we! At a minimum, file an issue letting us know. If you want to file a Pull Request, we'd be happy to review and merge it when it's ready.

Who should consume this package directly?

Are you writing C directly? Then you should. Are you using any other programming language? This functionality will be exposed via that language specific crt packages.

I found a security vulnerability in this package. What do I do?

Due to the fact that this package is specifically performing cryptographic operations, please don't file a public issue. Instead, email aws-sdk-common-runtime@amazon.com, and we'll work with you directly.

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