Implement Numpy BitGenerator.

benchmarks/chaopenssl.c

@@ -0,0 +1,55 @@
+#include <openssl/evp.h>
+#include <stdio.h>
+#include <string.h>
+
+int main() {
+    // Key and IV should be appropriately sized for ChaCha20
+    unsigned char key[] = {
+        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+        0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+        0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
+    };
+    unsigned char iv[] = {
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00
+    };
+
+    // Initialize context
+    EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
+    if (!ctx) {
+        perror("EVP_CIPHER_CTX_new failed");
+        return 1;
+    }
+
+    // Initialize the ChaCha20 cipher
+    if (!EVP_EncryptInit_ex(ctx, EVP_chacha20(), NULL, key, iv)) {
+        perror("EVP_EncryptInit_ex failed");
+        EVP_CIPHER_CTX_free(ctx);
+        return 1;
+    }
+
+    // Buffer for the keystream
+    unsigned char keystream[1000000];
+    memset(keystream, 0, sizeof(keystream));
+
+    for (int i = 0; i < 1000; i++) {
+        // Generate keystream
+        int len;
+        if (!EVP_EncryptUpdate(ctx, keystream, &len, keystream, sizeof keystream)) {
+            perror("EVP_EncryptUpdate failed");
+            EVP_CIPHER_CTX_free(ctx);
+            return 1;
+        }
+    }
+    // Clean up
+    EVP_CIPHER_CTX_free(ctx);
+
+    // Print the generated keystream
+    for (int i = 0; i < 64; i++) {
+        printf("%02x", keystream[i]);
+    }
+    printf("\n");
+
+    return 0;
+}