在 C 语言中用于 RSA 解密的 OpenSSL EVP api 的 EVP_OpenInit() 中出现错误

我在使用 OpenSSL 库（EVP api）进行 RSA 解密时遇到问题。 这是我的密钥生成代码

#include <stdio.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/bio.h>
#include <openssl/pem.h>

#define SECFILE "sec.pem"
#define PUBFILE "pub.pem"

int main()
{

    EVP_PKEY_CTX *ctx;
    EVP_PKEY *pkey = NULL;
    ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL);
    FILE *fp;

    if (!ctx)
    {
        /* Error occurred */
        perror("Error in CTX \n");

    }
    if (EVP_PKEY_keygen_init(ctx) <= 0)
    {
        /* Error */
        perror("Error in EVP_PKEY_keygen_init \n");
    }
    if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, 2048) <= 0)
    {
        /* Error */
        perror("Error in EVP_PKEY_CTX_set_rsa_keygen_bits \n");
    }
    /* Generate key */
    if (EVP_PKEY_keygen(ctx, &pkey) <= 0)
    {   
        /* Error */
        perror("Error in EVP_PKEY_keygen \n");

    }


    fp = fopen(SECFILE, "w");
    PEM_write_PrivateKey(fp, pkey, NULL,NULL, 0,0, NULL);
    fclose(fp);

    fp = fopen(PUBFILE, "w");
    PEM_write_PUBKEY(fp,pkey);
    fclose(fp);


    return 0;
}

对于加密：

我用过这个link https://stackoverflow.com/questions/2012645/can-you-help-me-get-my-head-around-openssl-public-key-encryption-with-rsa-h-in-c

对于解密：

   int do_evp_open(FILE *rsa_pkey_file, FILE *in_file, FILE *out_file) 
{ 
    int retval = 0; 
    RSA *rsa_pkey = NULL; 
    EVP_PKEY *pkey = EVP_PKEY_new(); 
    EVP_CIPHER_CTX ctx; 
    unsigned char buffer[4096]; 
    unsigned char buffer_out[4096 + EVP_MAX_IV_LENGTH]; 
    size_t len; 
    int len_out; 
    unsigned char *ek; 
    int eklen ; 
    uint32_t eklen_n; 
    unsigned char iv[EVP_MAX_IV_LENGTH] = {122,205,106,192,4,183,69,176,84,28,214,226,220,140,86,174}; 


    /// Read RSA Private Key 
    if (PEM_read_RSAPrivateKey(rsa_pkey_file, &rsa_pkey, NULL, NULL) == NULL) 
    { 
        fprintf(stderr, "Error loading RSA Private Key File.\n"); 
        ERR_print_errors_fp(stderr); 
        retval = -2; 
        goto out; 
    } 


    /// Assign RSA key to EVP key
    if (!EVP_PKEY_assign_RSA(pkey, rsa_pkey)) 
    { 
        fprintf(stderr, "EVP_PKEY_assign_RSA: failed.\n"); 
        retval = -3; 
        goto out; 
    }

    EVP_CIPHER_CTX_init(&ctx); 

    ek = malloc( EVP_PKEY_size(pkey)); 



    if (!EVP_OpenInit(&ctx, EVP_aes_128_cbc(), ek, eklen, iv,pkey)) 
    { 
        fprintf(stderr, "EVP_OpenInit: failed.\n"); 
       ERR_print_errors_fp(stderr); /// Prints error of occured in Openssl  
        retval = -3; 
        goto out_free; 
    } 




    while ((len = fread(buffer, 1, sizeof buffer, in_file)) > 0) 
    { 
        if (!EVP_OpenUpdate(&ctx, buffer_out, &len_out, buffer, len)) 
        { 
            fprintf(stderr, "EVP_OpenUpdate: failed.\n"); 
            retval = 3; 
            goto out_free; 
        } 

        if (fwrite(buffer_out, len_out, 1, out_file) != 1) 
        { 
            perror("output file"); 
            retval = -5; 
            goto out_free; 
        } 
    } 

    if (ferror(in_file)) 
    { 
        perror("input file"); 
        retval = -4; 
        goto out_free; 
    } 

    if (!EVP_OpenFinal(&ctx, buffer_out, &len_out)) 
    { 
        fprintf(stderr, "EVP_OpenFinal: failed.\n"); 
        retval = - 3; 
        goto out_free; 
    } 

    if (fwrite(buffer_out, len_out, 1, out_file) != 1) 
    { 
        perror("output file"); 
        retval = -5; 
        goto out_free; 
    } 

    out_free: 
    EVP_PKEY_free(pkey); 
    free(ek); 

    out: 
    return retval; 
} 

我的私钥和公钥是：

-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----


-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4/oOpuymOcyvMxWfzChc
kq9WQfp9G9xo4TFHFA5+UvTe6MqAs5DlVWu4JdI0yPHcAhVQMvOvd0avogE+3VEy
1Yk/VfBpF/a9MhXKabebnNmICOWjjk75kCkHtPBUme0G74hC9uTDZwXwdcKXfpiT
d529IZHqO8diGQ/2VX7Pk5jhvZh20EfG9V3MRA6C8d2l9SfBIsdaTe2CupwwBZvf
OB6Pjws9Whpf05w5d2/dF+R1xh4g+rjQx6JGfrYfAegHhRUZZFpUHdMNkXvxBGd+
qeE0Dh0nN7ElMOqXp9DfGJgTWZLARK9b7Gb2JCrUSgn8tH17S+Iqis3ICaHKLPme
pwIDAQAB
-----END PUBLIC KEY-----

EVP_OpenInit 时出现的错误是：

140004942804648:error:0407106B:lib(4):func(113):reason(107):rsa_pk1.c:190: 140004942804648:error:04065072:lib(4):func(101):reason(114):rsa_eay.c:594

任何帮助，将不胜感激。 谢谢， 帕万

您绝对确定已初始化变量 eklen 吗？