27 lines
639 B
C++
27 lines
639 B
C++
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#include "./hash_utils.hpp"
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#include <sha1.h>
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// returns the 20bytes sha1 hash
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std::vector<uint8_t> hash_sha1(const uint8_t* data, size_t size) {
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SHA1_CTX ctx;
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SHA1Init(&ctx);
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{ // lib only takes uint32_t sizes, so chunk it
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constexpr size_t hash_block_size {0xffffffff};
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size_t i = 0;
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for (; i + hash_block_size < size; i += hash_block_size) {
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SHA1Update(&ctx, reinterpret_cast<const uint8_t*>(data) + i, hash_block_size);
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}
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if (i < size) {
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SHA1Update(&ctx, reinterpret_cast<const uint8_t*>(data) + i, size - i);
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}
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}
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std::vector<uint8_t> sha1_hash(20);
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SHA1Final(sha1_hash.data(), &ctx);
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return sha1_hash;
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}
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