简单的base64不进行解码工作:(

Question

我一直在努力为base64使用下面的代码来解码输入的char *。 “味精”的价值似乎是一个空字符串:(

#include <string.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <openssl/bn.h> 
#include <openssl/bio.h> 
#include <openssl/objects.h> 
#include <openssl/pem.h> 
#include <openssl/objects.h> 

// reads b64 encoded msg (pReadBuffer) and writes to pWriiteFile. 
char * dgstdecode(char *pReadBuffer, int pLength) 
{ 
    char *msg = (char *)malloc(pLength); 
    memset(msg, 0x00, pLength); 
    int readbytes = -1; 

    printf("inside dgstdecode\n"); 
    printf("\n pReadBuffer = %s \n", pReadBuffer); 
    BIO *b64, *bio = NULL; 
    b64 = BIO_new(BIO_f_base64()); 
    bio = BIO_new_mem_buf(pReadBuffer, pLength); 
    bio = BIO_push(b64, bio); 
    //BIO_set_flags(bio,BIO_FLAGS_BASE64_NO_NL); 

    while ((readbytes = BIO_read(bio, msg, pLength)) > 0) 
    { 
    printf("readbytes: %d\n", readbytes); 
    printf("inside dgstdecode\n"); 
    } 
    BIO_flush(bio); 
    printf("msg = %s\n", msg); 
    BIO_free_all(bio); 
    //BIO_free_all(b64); 
    return msg; 

} 


int main(int argc, char *argv[]) 
{ 
    int i = 0; 
    char buff [9] ="aGVsbG8K" ; 
    //memset(buff, 0, 9); 
    char* ptr ; 
    ptr = (char*)malloc(9); 

    for(i =0;i < 4; i++){ 

     buff[9] = '\0'; 

     printf("strlen buff = %d\n", strlen(buff)); 
     ptr = dgstdecode(buff, 9); 
     printf("ptr = %s\n", ptr); 
    } 

    return 0; 

} 

Answer 1

对不起pimmling ！这里是正确的做法我只是清理的主要功能：

int main(int argc, char *argv[]) 
{ 
    int i = 0; 
    char buff [] ="aGVsbG8K\n\0" ; 
    char* ptr ; 

    for(i =0;i < 4; i++){ 

     printf("strlen buff = %d\n", strlen(buff)); 
     ptr = dgstdecode(buff, strlen(buff)); 
     printf("ptr = %s\n", ptr); 
     printf("\n"); 
    } 

    return 0; 
} 

我的输出现在（仍在执行丢弃/ N件事）：

strlen的抛光轮= 9 内部dgstdecode

pReadBuffer = aGVsbG8K

的ReadBytes：6 内dgstdecode MSG =你好

PTR =你好

strlen的抛光轮= 9 内部dgstdecode

pReadBuffer = aGVsbG8K

米

的ReadBytes：6 dgstdecode MSG =你好

PTR =你好

strlen的抛光轮= 9 内部内dgstdecode

pReadBuffer = aGVsbG8K

的ReadBytes：6 内dgstdecode MSG =你好

ptr =你好

strlen的抛光轮= 9 内部dgstdecode

pReadBuffer = aGVsbG8K

的ReadBytes：6 内dgstdecode MSG =你好

PTR =你好

否认我的下面原始响应：

bio = BIO_push(b64, bio);行似乎是罪魁祸首。它似乎覆盖了参考。这里是我的输出一次，我评论说，线（编辑似乎正在下降一些/ N的）：

strlen buff = 8 
inside dgstdecode 

pReadBuffer = aGVsbG8K 
readbytes: 9 
inside dgstdecode 
msg = aGVsbG8K 
ptr = aGVsbG8K 

strlen buff = 8 
inside dgstdecode 

pReadBuffer = aGVsbG8K 
readbytes: 9 
inside dgstdecode 
msg = aGVsbG8K 
ptr = aGVsbG8K 

strlen buff = 8 
inside dgstdecode 

pReadBuffer = aGVsbG8K 
readbytes: 9 
inside dgstdecode 
msg = aGVsbG8K 
ptr = aGVsbG8K 

strlen buff = 8 
inside dgstdecode 

pReadBuffer = aGVsbG8K 
readbytes: 9 
inside dgstdecode 
msg = aGVsbG8K 
ptr = aGVsbG8K