论坛徽章:: 0

电梯直达

1楼 [收藏(0)] [报告]

发表于 2010-04-25 13:12 |只看该作者 |倒序浏览

20可用积分

#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
int main(int argc, char** argv)
{
BIO *bpub;
BIO *bpri;
RSA *pRSA;
RSA *rsa_rpu;
FILE *fp = NULL;
unsigned char *encryptedString = NULL;
unsigned char *plainText= NULL;
bpub = BIO_new_file("public.rsa", "w");
if (!bpub)
printf("%s","failed to create public bio file\n");
bpri = BIO_new_file("private.rsa", "w");
if (!bpri)
printf("%s","failed to create private bio file\n");
if (!bpub || !bpri)
return -1;
pRSA = RSA_generate_key( 1024, RSA_F4, NULL, NULL);
if (pRSA != NULL) {
if (!PEM_write_bio_RSAPublicKey(bpub, pRSA) )
printf("%s","PEM_write_bio_RSAPublicKey: failed\n");
/*
int PEM_write_bio_RSAPrivateKey(BIO *bp, RSA *x, const EVP_CIPHER *enc,
unsigned char *kstr, int klen,
pem_password_cb *cb, void *u);
*/
if (!PEM_write_bio_RSAPrivateKey(bpri, pRSA, EVP_des_ede3_cbc(), NULL, 0, 0, "Private"))
printf("%s","PEM_write_bio_PrivateKey: failed\n");
}
if (bpub)
BIO_free(bpub);
if (bpri)
BIO_free(bpri);
if (pRSA)
free(pRSA);
printf("done.\n");
bpri = BIO_new_file("private.rsa", "r");
if(bpri==NULL)
{
printf("%s\n", "open private.rsa error");
return -1;
}
pRSA = PEM_read_bio_RSAPrivateKey(bpri, NULL, NULL, NULL);
if (pRSA==NULL){
printf("%s\n","Reading of private key failed");
}else{
printf("%s\n","Reading of private key successful");
}
bpub = BIO_new_file("public.rsa", "r");
if(bpub==NULL)
{
printf("%s\n", "open public.rsa error");
return -1;
}
rsa_rpu = PEM_read_bio_RSA_PUBKEY(bpub,NULL, NULL, NULL);
//printf("rsa_rpu is: %s",rsa_rpu);
if (rsa_rpu==NULL){
printf("rsa_rpu is:%s\n","Reading of public key failed");
}
else{
printf("rsa_rpu is:%s\n","Reading of public key successful");
}
encryptedString=(unsigned char *)malloc(RSA_size(rsa_rpu));
RSA_blinding_off(rsa_rpu);
if (RSA_public_encrypt(strlen("TrialString")+1,(unsigned char*)"TrialString",(unsigned char*)encryptedString,rsa_rpu,RSA_PKCS1_PADDING)==-1){
printf("%s\n","encryption failed ");
}
else{
printf("%s\n", "Encryption success");
}
plainText=(unsigned char *)malloc(RSA_size(pRSA));
if (RSA_private_decrypt(RSA_size(pRSA),encryptedString,(unsigned char*)plainText,pRSA,RSA_PKCS1_PADDING)==-1){
printf("%s\n","Decryption failed ");
}
else{
printf("%s\n","Decryption success");
}
printf("Plain text:%s\n",plainText);
return 0;
}

复制代码

生成public.rsa和private.rsa后,将public.rsa发给B,自己留private.rsa!!再加解密
为什么从保持有private key的private.rsa中读取RSA会失败呢？
PEM_read_bio_RSAPrivateKey和PEM_read_RSAPrivateKey都尝试过了...

public key 和public.rsa也是一样失败...
因为实际通过过程中肯定是把public.rsa发给用户的...

而我write file的时候使用PEM_write_RSA_PUBKEY和PEM_write_RSAPrivateKey,整个过程就是可以的....

文库|博客

ubuntuer

白手起家

论坛徽章:: 0

2楼 [报告]

发表于 2010-04-25 21:38 |只看该作者

问题更新下：

#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
int main(int argc, char** argv)
{
int i=0;
unsigned char *encryptedString = NULL;
BIO *bpub;
RSA *pRSA;
bpub = BIO_new_file("public.rsa", "r");
if (!bpub)
{
printf("failed to create public bio file\n");
}
pRSA = PEM_read_bio_RSAPublicKey(bpub,NULL,NULL,NULL);
if(pRSA == NULL)
{
printf("failed to get public key\n");
}
else
{
printf("succeed to get public key\n");
// printf("pRSA->d %ulld\n",pRSA->d->d);
}
RSA_print_fp(stdout, pRSA, 0);
encryptedString=(unsigned char *)malloc(2048);
memset(encryptedString,0,2048);
if (RSA_public_encrypt(strlen("123456")+1,(unsigned char*)"123456",(unsigned char*)encryptedString,pRSA,RSA_PKCS1_PADDING)==-1)
{
printf("%s\n","encryption failed ");
}
else{
printf("%s\n", "Encryption success");
for(i=0;i<strlen(encryptedString);i++)
{
if(i%16 == 0)
printf("\n");
printf("%02x ",encryptedString[i]);
}
printf("\n");
}
}