Ken Van Hoeylandt
dfaeb9a2d9
- Moved cryptography code out of Tactility project and into a kernel module. - Converted C++ code to C style interface - Hardened security
26 lines
656 B
C++
26 lines
656 B
C++
// SPDX-License-Identifier: Apache-2.0
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#include <tactility/hash.h>
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uint32_t djb2_str(const char* str) {
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uint32_t hash = 5381;
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char c = (char)*str++;
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while (c != 0) {
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hash = ((hash << 5) + hash) + (uint32_t)c; // hash * 33 + c
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c = (char)*str++;
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}
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return hash;
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}
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uint32_t djb2_data(const void* data, size_t length) {
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uint32_t hash = 5381;
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auto* data_bytes = static_cast<const uint8_t*>(data);
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uint8_t c = *data_bytes++;
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size_t index = 0;
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while (index < length) {
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hash = ((hash << 5) + hash) + (uint32_t)c; // hash * 33 + c
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c = *data_bytes++;
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index++;
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}
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return hash;
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}
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