C++ OpenSSL 之四：CER轉換爲PEM

1.等同於使用： openssl  x509 -in "cer_path" -inform DER -out "save_path" -outform PEM

2.代碼以下：cerFilePath是cer文件；cer文件是csr文件請求後得到。

bool MakePemSSL(const char* cerFilePath, const char* savePemFilePath) { int      ret = 0; X509 *x509 = NULL; FILE *cerFile = NULL, *pemFile = NULL; cerFile = fopen(cerFilePath, "rb"); if (cerFile == NULL) { fprintf(stderr, "MakeLocalPemSSL fopen cerFilePath err \n"); goto free_all; } pemFile = fopen(savePemFilePath, "w+"); if (pemFile == NULL) { fprintf(stderr, "MakeLocalPemSSL fopen savePemFilePath err \n"); goto free_all; } x509 = d2i_X509_fp(cerFile, NULL); if (x509 == NULL) { fprintf(stderr, "MakeLocalPemSSL failed to parse to X509 from cerFile \n"); goto free_all; } ret = PEM_write_X509(pemFile, x509); if (ret != 1) { fprintf(stderr, "MakeLocalPemSSL failed to PEM_write_X509 \n"); goto free_all; } free_all: if (cerFile) fclose(cerFile); if (pemFile) fclose(pemFile); return (ret == 1); }

以上。

 

《C++ OpenSSL 之一：編譯和使用》
《C++ OpenSSL 之二：生成RSA文件》
《C++ OpenSSL 之三：生成CSR文件》
《C++ OpenSSL 之四：CER轉換爲PEM》
《C++ OpenSSL 之五：生成P12文件》