1 CC=gcc 2 CPPFLAGS= -I /home/yyx/02/openssl-1.0.1t/include/ 3 CFLAGS=-Wall -g 4 LIBPATH = -L /usr/lib 5 LIBS= -lssl -lcrypto -lhiredis -lm 6 7 8 #找到当前目录下所有的.c文件 9 src = $(wildcard ./src/*.c) 10 11 #将当前目录下所有的.c 转换成.o给obj 12 obj = $(patsubst %.c, %.o, $(src)) 13 14 rsa = test_rsa 15 16 target = $(rsa) 17 18 ALL:$(target) 19 20 #生成所有的.o文件 21 $(obj):%.o:%.c 22 $(CC) -c $< -o $@ $(CPPFLAGS) $(LIBPATH) $(LIBS) $(CFLAGS) 23 24 #test_rsa程序 25 $(rsa):./src/test.o 26 $(CC) $^ -o $@ $(CPPFLAGS) $(LIBPATH) $(LIBS) $(CFLAGS) 27 28 29 #clean指令 30 31 clean: 32 -rm -rf $(obj) $(target) ./test/*.o 33 34 #将clean目标 改成一个虚拟符号
1 // RSA 加密 /// 2 3 #include <stdio.h> 4 #include <stdlib.h> 5 #include <string.h> 6 #include <errno.h> 7 #include <openssl/rsa.h> 8 #include <openssl/pem.h> 9 #include <openssl/err.h> 10 #include <openssl/ssl.h> 11 12 13 #define OPENSSLKEY "test.key" 14 #define PUBLICKEY "test_pub.key" 15 #define BUFFSIZE 1024 16 17 char *my_encrypt(char *str, char *path_key); //加密 18 char *my_decrypt(char *str, char *path_key); //解密 19 20 int main(void) 21 { 22 char *source = "i like dancing !!!"; 23 24 char *ptf_en, *ptf_de; 25 26 printf("source is :%s\n", source); 27 28 //1.加密 29 ptf_en = my_encrypt(source, PUBLICKEY); 30 printf("ptf_en is :%s\n", ptf_en); 31 32 //2.解密 33 ptf_de = my_decrypt(ptf_en, OPENSSLKEY); 34 printf("ptf_de is :%s\n", ptf_de); 35 36 if(ptf_en) free(ptf_en); 37 if(ptf_de) free(ptf_de); 38 39 return 0; 40 41 } 42 43 //加密 44 char *my_encrypt(char *str, char *path_key) 45 { 46 char *p_en = NULL; 47 RSA *p_rsa = NULL; 48 FILE *file = NULL; 49 50 int rsa_len = 0; //flen为源文件长度, rsa_len为秘钥长度 51 52 //1.打开秘钥文件 53 if((file = fopen(path_key, "r")) == NULL) 54 { 55 perror("fopen() error "); 56 goto End; 57 } 58 59 //2.从公钥中获取 加密的秘钥 60 if((p_rsa = PEM_read_RSA_PUBKEY(file, NULL,NULL,NULL )) == NULL) 61 { 62 ERR_print_errors_fp(stdout); 63 goto End; 64 } 65 66 //3.获取秘钥的长度 67 rsa_len = RSA_size(p_rsa); 68 69 //4.为加密后的内容 申请空间(根据秘钥的长度+1) 70 p_en = (char *)malloc(rsa_len + 1); 71 if(!p_en) 72 { 73 perror("malloc() error "); 74 goto End; 75 } 76 memset(p_en, 0, rsa_len + 1); 77 78 //5.对内容进行加密 79 if(RSA_public_encrypt(rsa_len, (unsigned char*)str, (unsigned char*)p_en, p_rsa, RSA_NO_PADDING) < 0) 80 { 81 perror("RSA_public_encrypt() error "); 82 goto End; 83 } 84 85 End: 86 87 //6.释放秘钥空间, 关闭文件 88 if(p_rsa) RSA_free(p_rsa); 89 if(file) fclose(file); 90 91 return p_en; 92 } 93 94 //解密 95 char *my_decrypt(char *str, char *path_key) 96 { 97 char *p_de = NULL; 98 RSA *p_rsa = NULL; 99 FILE *file = NULL; 100 int rsa_len = 0; 101 102 103 //1.打开秘钥文件 104 file = fopen(path_key, "r"); 105 { 106 perror("fopen() error "); 107 goto End; 108 } 109 110 //2.从私钥中获取 解密的秘钥 111 if((p_rsa = PEM_read_RSAPrivateKey(file, NULL,NULL,NULL )) == NULL) 112 { 113 ERR_print_errors_fp(stdout); 114 goto End; 115 } 116 117 //3.获取秘钥的长度, 118 rsa_len = RSA_size(p_rsa); 119 120 //4.为加密后的内容 申请空间(根据秘钥的长度+1) 121 p_de = (char *)malloc(rsa_len + 1); 122 if(!p_de) 123 { 124 perror("malloc() error "); 125 goto End; 126 } 127 memset(p_de, 0, rsa_len + 1); 128 129 //5.对内容进行加密 130 if(RSA_private_decrypt(rsa_len, (unsigned char*)str, (unsigned char*)p_de, p_rsa, RSA_NO_PADDING) < 0) 131 { 132 perror("RSA_public_encrypt() error "); 133 goto End; 134 } 135 136 End: 137 //6.释放秘钥空间, 关闭文件 138 if(p_rsa) RSA_free(p_rsa); 139 if(file) fclose(file); 140 141 return p_de; 142 }
35 .PHONY: clean ALL
原文:http://www.cnblogs.com/yyx1-1/p/6114858.html