iOS 使用openssl实现读取SM2证书公私钥

iOS    使用Gmssl实现SM2证书读取公私钥

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读取sm2证书,使用的openssl里标准接口去解析p12或pfx文件,大概的步骤是:

1.解析p12,提取里面的参数信息(包含公私钥,算法,位数等信息)

2.将第一步的参数信息写入一个txt文件

废话不多说,直接上代码:

# include "pkcs12.h"
EVP_PKEY * BaseLoadKey (BIO * bio, char *strPwd){

EVP_PKEY *pkey = NULL;

PKCS12 *p12 = d2i_PKCS12_bio (bio, NULL);

PKCS12_parse (p12, strPwd, &pkey, NULL, NULL);

PKCS12_free (p12);

p12 = NULL;

return pkey;

}

int getprivateKeyTxt(const char * p12Path, const char * p12Password, const char *privateKeyTxtPath){

BIO *in = BIO_new_file(p12Path, "r");

EVP_PKEY * key = BaseLoadKey(in, (char *)p12Password);

BIO *out = BIO_new_file(privateKeyTxtPath, "w");

EVP_PKEY_print_private(out, key, 0, NULL);

if(!out){ return 0; }else{ BIO_printf(out, "");

BIO_free(out); return 1;

}

}