我试图从生成的公钥加载rsa对象。我用PEM_write_bio_RSAPublicKey
来生成公钥字符串。然后我使用PEM_read_bio_RSA_PUBKEY
从公钥字符串中加载rsa对象。问题是rsa对象为null。据我所知,生成的字符串看起来没问题。有任何想法吗?加载公钥为公共加密创建rsa对象
-----BEGIN RSA PUBLIC KEY-----
MIIBCgKCAQEAxIReUspesPy6a4CPBjt/4Jt+H13q9MekMiutzNKdNO1uuwqcdqDX
pKPeTKXyUH6oCyRdUxkk6IVXGlBlxtW7OsxaYWhpfl9z3CCERCEpFmzN++dvlK2v
mckFL66e9q6Y+HwgyP1LJqrszeqlg2d29TCVKfD/UURVNmc/nPPjs9nO+IDhh7+P
NTQ2OqGBq8ghwVL5ZZyW3yVO5OAbRB6pjKBe9+j4B2TGnD5JO9Nu0jlFANZOKFJu
HDVE3XuTvOkuzL2i8Lwp4Myk42tbIgcCe4G58vKFddL651rWhg4hN3fRSx5YtDnQ
r5cgfNBOAww58S8lwXgU8lvzvEoNV+WMgwIDAQAB
-----END RSA PUBLIC KEY-----
GCC test_public_private_key.c -lcrypto -o测试
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
char* get_public_key() {
RSA* rsa = RSA_new();
int kbits = 2048;
BIGNUM* bne = BN_new();
BN_set_word(bne, RSA_F4);
int status = RSA_generate_key_ex(rsa, kbits, bne, NULL);
if(status == 0) {
fprintf(stderr, "rsa key generation failed\n");
}
BIO *bio = BIO_new(BIO_s_mem());
PEM_write_bio_RSAPublicKey(bio, rsa);
int length = BIO_pending(bio);
char* pem_key = malloc(length+1);
memset(pem_key, '\0', length+1);
BIO_read(bio, pem_key, length);
return pem_key;
}
int main(int argc, char* argv[]) {
char* public_key = get_public_key();
printf("%s", public_key);
BIO* keybio = BIO_new_mem_buf(public_key, -1);
if (keybio == NULL) {
fprintf(stderr, "failed to create key BIO");
}
printf("keybio: %p\n", keybio);
RSA* rsa = PEM_read_bio_RSA_PUBKEY(keybio, NULL, NULL, NULL);
printf("rsa result %p\n", rsa);
BIO_free(keybio);
free(public_key);
return 0;
}
我记得看到一个设置了'''''''BIO_FLAGS_BASE64_NO_NL'''标志的工作示例。也许尝试用'''BIO_set_flags(bio,BIO_FLAGS_BASE64_NO_NL);'' – Daniel
@Daniel设置此标志我不确定它是否应该包含单词RSA ....它是库自己的函数生成的字符串。我通过谷歌搜索看到了NL示例,但这并不意味着如果我使用该选项,我应该从生成的字符串中去除新行。 –
我尝试了NO_NL选项,但没有剥离换行符,但它仍然无法使用。 –