Checklist

• 1. I have searched existing issues. (https://gitcode.com/openHiTLS/openhitls/issues)
• 2. The bug exists in the latest version.
• 3. I understand that issues without environment info and minimal reproducible example may be closed.

Bug Description

`

• 位置: crypto/bn/src/bn_utils.c:235 (BN_BN2Array)
• 描述: BN_BN2Array(const BN_BigNum *src, BN_UINT *dst, uint32_t size) 在 line 235 直接访问 src->size, 未检查 src==NULL。传入 NULL src 会导致 segfault。
• 检测方式: 覆盖率补测触发 (测试 BN_BN2Array(NULL, arr, 16) 时 segfault)
• 用例:SDV_CRYPTO_BN_UTILS_CONV_API_TC001
  `

Environment Information

software

Version Information

latest

Additional Information