我正在尝试一个小的示例程序来解密已经签名然后使用openSSL加密的消息。它在命令行中运行良好。但是,在修改OpenSSL的'demos'文件夹中的代码后尝试代码时,解密失败
这是解密代码:
int decrypt_smime(){
BIO *in = NULL, *out = NULL, *tbio = NULL;
X509 *rcert = NULL;
EVP_PKEY *rkey = NULL;
//PKCS7 *cms = NULL;
CMS_ContentInfo *cms = NULL;
int ret = 1;
int flags = CMS_STREAM;
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
printf("decrypt...\n");
/* Read in recipient certificate and private key */
tbio = BIO_new_file("signer.pem", "r");
if (!tbio)
goto err;
rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
BIO_reset(tbio);
rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
if (!rcert || !rkey)
goto err;
printf("decrypt...\n");
/* Open S/MIME message to decrypt */
in = BIO_new_file("smencsign.txt", "r");
if (!in)
goto err;
printf("keys read...\n");
/* Parse message */
cms = SMIME_read_CMS(in, NULL); //here is the problem I think
if (!cms)
goto err;
printf("keys read...\n");
out = BIO_new_file("decout.txt", "w");
if (!out)
goto err;
/* Decrypt S/MIME message */
if (!CMS_decrypt(cms, rkey, rcert, NULL, out, flags))
goto err;
ret = 0;
err:
if (ret)
{
fprintf(stderr, "Error Decrypting Data\n");
ERR_print_errors_fp(stderr);
}
if (cms)
//PKCS7_free(cms);
CMS_ContentInfo_free(cms);
if (rcert)
X509_free(rcert);
if (rkey)
EVP_PKEY_free(rkey);
if (in)
BIO_free(in);
if (out)
BIO_free(out);
if (tbio)
BIO_free(tbio);
return ret;
}
我得到的错误是: 验证数据时出错 * 3074258568:错误:0D0D40D1:asn1编码例程:SMIME_read_ASN1:无内容类型:asn_mime.c:451:*
The commands on openssl that worked:
openssl cms -sign -in encr.txt -signer signer.pem -text | openssl cms -encrypt -out smencsign.txt signer.pem
openssl smime -decrypt -in smencsign.txt -recip signer.pem -inkey signer.pem
很明显openssl使用'cms'实用程序进行签名和加密,但似乎使用'smime'实用程序进行解密。那等价的代码是什么?
答案 0 :(得分:0)
尝试添加以下行:
OpenSSL_add_all_ciphers();