guanzhi
bug sm2_lib.c:499:sm2_do_encrypt(): 解密发生错误
#include <stdio.h> #include <string.h> #include <stdlib.h> #include <gmssl/sm2.h> #include <gmssl/error.h> #include <time.h>
int main(void) { SM2_KEY sm2_key; SM2_KEY pub_key; unsigned char plaintext[SM2_MAX_PLAINTEXT_SIZE]; unsigned char ciphertext[SM2_MAX_CIPHERTEXT_SIZE]; size_t len;
// 从 hello.txt 读取文本内容
FILE *file = fopen("/Users/andy/CLionProjects/learnc/hello.txt", "r");
if (file == NULL) {
printf("无法打开文件\n");
return 1;
}
fseek(file, 0, SEEK_END);
long file_size = ftell(file);
fseek(file, 0, SEEK_SET);
fread(plaintext, sizeof(unsigned char), file_size, file);
fclose(file);
sm2_key_generate(&sm2_key);
memcpy(&pub_key, &sm2_key, sizeof(SM2_POINT));
//打印 file_size
printf("file_size: %ld\n", file_size);
sm2_encrypt(&pub_key, plaintext, file_size, ciphertext, &len);
format_bytes(stdout, 0, 0, "ciphertext", ciphertext, len);
//打印 len
printf("len: %ld\n", len);
if (sm2_decrypt(&sm2_key, ciphertext, len, plaintext, &len) != 1) {
fprintf(stderr, "解密发生错误\n");
return 1;
}
plaintext[len] = 0;
// 将解密后的文本内容写入 hello1.txt
file = fopen("/Users/andy/CLionProjects/learnc/hello1.txt", "w");
if (file == NULL) {
printf("无法打开文件\n");
return 1;
}
fwrite(plaintext, sizeof(unsigned char), len, file);
fclose(file);
return 0;
} /Users/andy/CLionProjects/learnc/GmSSL/src/sm2_lib.c:499:sm2_do_encrypt(): /Users/andy/CLionProjects/learnc/GmSSL/src/sm2_lib.c:802:sm2_encrypt(): /Users/andy/CLionProjects/learnc/GmSSL/src/sm2_lib.c:848:sm2_decrypt(): 解密发生错误 file_size: 19020 ciphertext: (null) len: 0
SM2_MAX_PLAINTEXT_SIZE 定义是255 ，你这个文件偏大了点，试试小点
/Users/andy/CLionProjects/learnc/GmSSL/src/sm2_lib.c:499:sm2_do_encrypt():
if ( !(SM2_MIN_PLAINTEXT_SIZE <= inlen && inlen <= SM2_MAX_PLAINTEXT_SIZE)) {
error_print();
return -1;
}
