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搜狗2012笔试真题 -- #include "stdint.h" // 注：以上内容没有前面的“--”，做时去掉即可 int encode(const void* raw_in, void* raw_out, uint32_t password, size_t len) { const uint8_t* in = (const uint8_t*)raw_in; uint8_t* out = (uint8_t*)raw_out; uint32_t seed = password ^ 0x42381238u; for (size_t i = 0 ; i < len; ++i) { uint8_t a = ( in ^ seed ) >> 2; uint8_t b = ( ( ((uint32_t)in) << 10 ) ^ seed ) >> (10-6); a &= 63; b &= 192; a = 63 & ( a ^ (b << 3)); out = a | b; seed = (((seed << 7) ^ seed ^ in) + 48475829); } return 0; } int decode(const void* raw_in, void* raw_out, uint32_t password, size_t len) { const uint8_t* in = (const uint8_t*)raw_in; uint8_t* out = (uint8_t*)raw_out; uint32_t seed = password ^ 0x42381238u; for (size_t i = 0 ; i < len; ++i) { // 请在此处补全代码 } } int main() { const uint8_t buf1[] = {0xf5, 0x3b, 0x3a, 0x0d, 0x54, 0x73, 0x34, 0xfe, 0x5d, 0x72, 0x2d, 0x8b, 0xca, 0x1d, 0xdb, 0xd4, 0x94, 0xfa, 0x88, 0xae, 0x51, 0x4f, 0x85, 0x38, 0x96, 0x33, 0xf1, 0xa3, 0x41, 0xf9, 0xc8, 0x67, 0xfc, 0x01, 0xc7, 0xdd, 0x22, 0xe7, 0xbd, 0x83, }; uint8_t buf2[100] = {}; const uint32_t password = 0x266d183bu; const size_t len = sizeof(buf1); encode(buf1, buf2, password, len); printf("%sn", buf2); } 求哈希解码算法 （责任编辑：职场达人） |
