externals: Remove need for cryptopp build. (#2707)

src/common/sha1.h

@@ -0,0 +1,180 @@
+// SPDX-FileCopyrightText: 2012 SAURAV MOHAPATRA <mohaps@gmail.com>
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+
+namespace sha1 {
+class SHA1 {
+public:
+    typedef uint32_t digest32_t[5];
+    typedef uint8_t digest8_t[20];
+    inline static uint32_t LeftRotate(uint32_t value, size_t count) {
+        return (value << count) ^ (value >> (32 - count));
+    }
+    SHA1() {
+        reset();
+    }
+    virtual ~SHA1() {}
+    SHA1(const SHA1& s) {
+        *this = s;
+    }
+    const SHA1& operator=(const SHA1& s) {
+        memcpy(m_digest, s.m_digest, 5 * sizeof(uint32_t));
+        memcpy(m_block, s.m_block, 64);
+        m_blockByteIndex = s.m_blockByteIndex;
+        m_byteCount = s.m_byteCount;
+        return *this;
+    }
+    SHA1& reset() {
+        m_digest[0] = 0x67452301;
+        m_digest[1] = 0xEFCDAB89;
+        m_digest[2] = 0x98BADCFE;
+        m_digest[3] = 0x10325476;
+        m_digest[4] = 0xC3D2E1F0;
+        m_blockByteIndex = 0;
+        m_byteCount = 0;
+        return *this;
+    }
+    SHA1& processByte(uint8_t octet) {
+        this->m_block[this->m_blockByteIndex++] = octet;
+        ++this->m_byteCount;
+        if (m_blockByteIndex == 64) {
+            this->m_blockByteIndex = 0;
+            processBlock();
+        }
+        return *this;
+    }
+    SHA1& processBlock(const void* const start, const void* const end) {
+        const uint8_t* begin = static_cast<const uint8_t*>(start);
+        const uint8_t* finish = static_cast<const uint8_t*>(end);
+        while (begin != finish) {
+            processByte(*begin);
+            begin++;
+        }
+        return *this;
+    }
+    SHA1& processBytes(const void* const data, size_t len) {
+        const uint8_t* block = static_cast<const uint8_t*>(data);
+        processBlock(block, block + len);
+        return *this;
+    }
+    const uint32_t* getDigest(digest32_t digest) {
+        size_t bitCount = this->m_byteCount * 8;
+        processByte(0x80);
+        if (this->m_blockByteIndex > 56) {
+            while (m_blockByteIndex != 0) {
+                processByte(0);
+            }
+            while (m_blockByteIndex < 56) {
+                processByte(0);
+            }
+        } else {
+            while (m_blockByteIndex < 56) {
+                processByte(0);
+            }
+        }
+        processByte(0);
+        processByte(0);
+        processByte(0);
+        processByte(0);
+        processByte(static_cast<unsigned char>((bitCount >> 24) & 0xFF));
+        processByte(static_cast<unsigned char>((bitCount >> 16) & 0xFF));
+        processByte(static_cast<unsigned char>((bitCount >> 8) & 0xFF));
+        processByte(static_cast<unsigned char>((bitCount) & 0xFF));
+
+        memcpy(digest, m_digest, 5 * sizeof(uint32_t));
+        return digest;
+    }
+    const uint8_t* getDigestBytes(digest8_t digest) {
+        digest32_t d32;
+        getDigest(d32);
+        size_t di = 0;
+        digest[di++] = ((d32[0] >> 24) & 0xFF);
+        digest[di++] = ((d32[0] >> 16) & 0xFF);
+        digest[di++] = ((d32[0] >> 8) & 0xFF);
+        digest[di++] = ((d32[0]) & 0xFF);
+
+        digest[di++] = ((d32[1] >> 24) & 0xFF);
+        digest[di++] = ((d32[1] >> 16) & 0xFF);
+        digest[di++] = ((d32[1] >> 8) & 0xFF);
+        digest[di++] = ((d32[1]) & 0xFF);
+
+        digest[di++] = ((d32[2] >> 24) & 0xFF);
+        digest[di++] = ((d32[2] >> 16) & 0xFF);
+        digest[di++] = ((d32[2] >> 8) & 0xFF);
+        digest[di++] = ((d32[2]) & 0xFF);
+
+        digest[di++] = ((d32[3] >> 24) & 0xFF);
+        digest[di++] = ((d32[3] >> 16) & 0xFF);
+        digest[di++] = ((d32[3] >> 8) & 0xFF);
+        digest[di++] = ((d32[3]) & 0xFF);
+
+        digest[di++] = ((d32[4] >> 24) & 0xFF);
+        digest[di++] = ((d32[4] >> 16) & 0xFF);
+        digest[di++] = ((d32[4] >> 8) & 0xFF);
+        digest[di++] = ((d32[4]) & 0xFF);
+        return digest;
+    }
+
+protected:
+    void processBlock() {
+        uint32_t w[80];
+        for (size_t i = 0; i < 16; i++) {
+            w[i] = (m_block[i * 4 + 0] << 24);
+            w[i] |= (m_block[i * 4 + 1] << 16);
+            w[i] |= (m_block[i * 4 + 2] << 8);
+            w[i] |= (m_block[i * 4 + 3]);
+        }
+        for (size_t i = 16; i < 80; i++) {
+            w[i] = LeftRotate((w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]), 1);
+        }
+
+        uint32_t a = m_digest[0];
+        uint32_t b = m_digest[1];
+        uint32_t c = m_digest[2];
+        uint32_t d = m_digest[3];
+        uint32_t e = m_digest[4];
+
+        for (std::size_t i = 0; i < 80; ++i) {
+            uint32_t f = 0;
+            uint32_t k = 0;
+
+            if (i < 20) {
+                f = (b & c) | (~b & d);
+                k = 0x5A827999;
+            } else if (i < 40) {
+                f = b ^ c ^ d;
+                k = 0x6ED9EBA1;
+            } else if (i < 60) {
+                f = (b & c) | (b & d) | (c & d);
+                k = 0x8F1BBCDC;
+            } else {
+                f = b ^ c ^ d;
+                k = 0xCA62C1D6;
+            }
+            uint32_t temp = LeftRotate(a, 5) + f + e + k + w[i];
+            e = d;
+            d = c;
+            c = LeftRotate(b, 30);
+            b = a;
+            a = temp;
+        }
+
+        m_digest[0] += a;
+        m_digest[1] += b;
+        m_digest[2] += c;
+        m_digest[3] += d;
+        m_digest[4] += e;
+    }
+
+private:
+    digest32_t m_digest;
+    uint8_t m_block[64];
+    size_t m_blockByteIndex;
+    size_t m_byteCount;
+};
+} // namespace sha1