PEM文件有以下格式

? ? 1.PEM私鑰文件格式

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

? ? ?生成該密鑰的Linux命令 : OpenSSL> genrsa -out privateKey.pem 1024

? ? ?讀取該密鑰的Linux Openssl API函數(shù)文件讀取:

?RSA *PEM_read_RSAPrivateKey(FILE *fp, RSA **rsa, pem_password_cb *cb, void *u)

? ? ?讀取該密鑰的Linux Openssl API函數(shù)內(nèi)存讀取:

?RSA *PEM_read_bio_RSAPrivateKey(BIO *bio, RSA **rsa, pem_password_cb *cb, void *u)

? ? ?2.PEM私鑰文件格式(經(jīng)過口令加密)

-----BEGIN RSA PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: DES-EDE3-CBC,FCD22C6C17CF034C -----END RSA PRIVATE KEY-----

? ? ? 3.PEM公鑰文件格式

-----BEGIN PUBLIC KEY----- -----END PUBLIC KEY-----

? ? ? 生成該密鑰的Linux命令: OpenSSL>rsa -in privateKey.pem -pubout -out publicKey.pem

? ? ? 讀取該密鑰的Linux Openssl API函數(shù)文件讀取:

?RSA *PEM_read_RSA_PUBKey(FILE *fp, RSA **rsa, pem_password_cb *cb, void *u)

? ? ? 讀取該密鑰的Linux Openssl API函數(shù)內(nèi)存讀取:

? RSA *PEM_read_bio_PublicKey(BIO *bio, RSA **rsa, pem_password_cb *cb, void *u)

? ? ? 4.PEM RSAPublicKey公鑰文件格式

? ?-----BEGIN RSA PUBLIC KEY-----

? ?-----END RSA PUBLIC KEY-----

? ? ? ?生成該密鑰的Linux命令: OpenSSL>rsa -in privateKey.pem -RSAPublicKey_out -out publicKey.pem

? ? ? ?讀取該密鑰的Linux Openssl API函數(shù)文件讀取:

? ? RSA *PEM_read_RSAPublicKey(FILE *fp, RSA **rsa, pem_password_cb *cb, void *u)

? ? ? ?讀取該密鑰的Linux Openssl API函數(shù)內(nèi)存讀取:

? ? RSA *PEM_read_bio_RSAPublicKey(BIO *bio, RSA **rsa, pem_password_cb *cb, void *u)

? ? ? 5.RSA加密API

? ? ?int RSA_public_encrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa, int padding)

? ? ? ?參數(shù)說明:

? ? ? ? flen: 填充方式加密長度

? ? ? ? from: 要加密信息

? ? ? ? to: 加密后的信息

? ? ? ? padding: 填充方式(RSA_PKCS1_PADDING, RSA_PKCS1_OAEP_PADDING, RSA_SSLV23_PADDING, RSA_NO_PADDING)

? ? ? ? 注:flen會根據(jù)不同的填充方式大小會有變化參考

? ? ? 6.RSA解密API

? ? ? int RSA_private_decrypt(int flen, unsigned char *from, unsigned char *to, RSA *rsa, int padding)?

? ? ? ? ? flen: 解密密鑰長度

? ? ? ? ? from: 要解密信息

? ? ? ? ? to: 解密后的信息

? ? ? ? ? padding: 填充方式(RSA_PKCS1_PADDING, RSA_PKCS1_OAEP_PADDING, RSA_SSLV23_PADDING, RSA_NO_PADDING)

? ? ? ? ? 注: flen填寫的是密鑰長度可用RSA_size(rsa)函數(shù)得到的

? ? ? 7.RSA編程示例(PEM文件方式)

#include <openssl/rsa.h> #include <openssl/pem.h>#define PUBLICKEY "publicKey.pem" #define PRIVATEKEY "privateKey.pem"#define PASS "8888" //口令int main(int argc, char *argv[]) {FILE *fp = NULL;RSA *publicRsa = NULL;RSA *privateRsa = NULL;if ((fp = fopen(PUBLICKEY, "r")) == NULL) {printf("public key path error\n");return -1;}if ((publicRsa = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {printf("PEM_read_RSA_PUBKEY error \n");return -1;}fclose(fp);if ((fp = fopen(PRIVATEKEY, "r")) == NULL) {printf("private key path error\n");return -1;}OpenSSL_add_all_algorithms(); //密鑰有經(jīng)過口令加密需要這個函數(shù)if ((privateRsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, (char *)PASS)) == NULL) {printf("PEM_read_RSAPrivateKey error\n");return NULL;}fclose(fp);unsigned char *source = (unsigned char *)"123456789";int rsa_len = RSA_size(publicRsa);unsigned char *encryptMsg = (unsigned char *)malloc(rsa_len);memset(encryptMsg, 0, rsa_len);int len = rsa_len - 11;if (RSA_public_encrypt(len, source, encryptMsg, publicRsa, RSA_PKCS1_PADDING) < 0) printf("RSA_public_encrypt error\n");else {rsa_len = RSA_size(privateRsa);unsigned char *decryptMsg = (unsigned char *)malloc(rsa_len);memset(decryptMsg, 0, rsa_len);int mun = RSA_private_decrypt(rsa_len, encryptMsg, decryptMsg, privateRsa, RSA_PKCS1_PADDING);if (mun < 0) printf("RSA_private_decrypt error\n");else printf("RSA_private_decrypt %s\n", decryptMsg);}RSA_free(publicRsa);RSA_free(privateRsa);return 0; }

? ? ? ? 8.RSA編程示例(PEM內(nèi)存方式)

#include <cstdio> #include <cstring> #include <openssl/rsa.h> #include <openssl/pem.h>const char *publicKey = "-----BEGIN PUBLIC KEY-----\n\ MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDnal1HozHfmZ3B1TITmbjCNKOs\n\ 49S+urgJ2P0/T36qN5w+r1jGhZKr54QDI5oXEk+9arlKxDW8kufwGjaTV3i3hyGS\n\ jYv4wNXhPeZAyAQ1vlloLMT6oA0PKe9/l8+mAr1QPEW9fMixAc/0UzPVospjkpfr\n\ YULcrKcH2Oaou5DZ0QIDAQAB\n\ -----END PUBLIC KEY-----";const char *privateKey = "-----BEGIN RSA PRIVATE KEY-----\n\ Proc-Type: 4,ENCRYPTED\n\ DEK-Info: DES-EDE3-CBC,DF3BD9835CA1186D\n\ \n\ pomWi9/hjscwDDzH5CEpcj8nCumOQpl/2Gk2YynA47qfhxt12glNjgWl5Eaevk2L\n\ bG1t85sPqEvYxAe+ZxZdP6fot+sAg4SUUwSvBMwa7s3XjVhHjf/+hOIjb0skHvp/\n\ p0eOoUgytX7FrNNYEpUFI+eiPob79fgQMq/rypGJ//G6GXLMYixWw2+PyPa1x2PQ\n\ WdBaTpZK3gmDqmu6jR3ieKOahVVO4fEGB5etvB5i1aAh0mT4Wu+ejv2LgIRr2xor\n\ r8LkQZvI/TryZ0sNLe7LlC1bz/Hw8hLBDPprhWaUcSEk6MMgh3LKA2y/pGpFdIYN\n\ Ncj/c+YqEsO+I0KOtPQ1fXlXd1hH1H1rkJxuaNanF0UInUuupV3fP+7cvmfyHM4m\n\ aix8ROt1/Ghau41JDZGYmwk2qgKjUw4zz3eYOMQKl6row3pzhDxbvoMp0Qvfje1J\n\ RYpKMy8skG9pY1l4i1CC98aESC2a7FzjUNcY3f5Jt+QznO15xXxxuJZ8+xNqtIh2\n\ U348rlrQ8OxS1YBJCr+wjesdBdQAiY6X1YB9tljPs7AhlTLo78pHtQac521xOA8j\n\ IcbfkuTIrMIwYBOtM6SJHkB1TgPdPWx+haEy79Ct2yDnvpPqOiFz8i8TG8AQY53l\n\ 5xKxxJ9CmPqw+Ua3DAWPaxAMaJFteRbl5Lv/2MvxV9Mu3T0W4B3ij+Gg5aw81v5Y\n\ KTH2KxruYAF5Q70QG8CAR8Vkvdczw940y8nb9pvcixmqYcaaeM9DLaTbycn/AeCt\n\ 3UM0R0vvu039Ix5uhXUtVMjhTeUnvNObwEcKM8Grv1oPV3zmTJ5hJg==\n\ -----END RSA PRIVATE KEY-----"; --------------------- #define PASS "8888" //口令int main(int argc, char *argv[]) {BIO *bio = NULL;RSA *publicRsa = NULL;RSA *privateRsa = NULL;if ((bio = BIO_new_mem_buf((void *)publicKey, -1)) == NULL) {printf("BIO_new_mem_buf publicKey error\n");return -1;}if ((publicRsa = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL)) == NULL) {printf("PEM_read_bio_RSA_PUBKEY error\n");return -1;}BIO_free_all(bio);if ((bio = BIO_new_mem_buf((void *)privateKey, -1)) == NULL) {printf("BIO_new_mem_buf privateKey error\n");return -1;}OpenSSL_add_all_algorithms();//密鑰有經(jīng)過口令加密需要這個函數(shù)if ((privateRsa = PEM_read_bio_RSAPrivateKey(bio, NULL, NULL, (char *)PASS)) == NULL) {printf("PEM_read_RSAPrivateKey error\n");return NULL;}BIO_free_all(bio);unsigned char *source = (unsigned char *)"123456789";int rsa_len = RSA_size(publicRsa);unsigned char *encryptMsg = (unsigned char *)malloc(rsa_len);memset(encryptMsg, 0, rsa_len);int len = rsa_len - 11;if (RSA_public_encrypt(len, source, encryptMsg, publicRsa, RSA_PKCS1_PADDING) < 0) printf("RSA_public_encrypt error\n");else {rsa_len = RSA_size(privateRsa);unsigned char *decryptMsg = (unsigned char *)malloc(rsa_len);memset(decryptMsg, 0, rsa_len);int mun = RSA_private_decrypt(rsa_len, encryptMsg, decryptMsg, privateRsa, RSA_PKCS1_PADDING);if (mun < 0) printf("RSA_private_decrypt error\n");else printf("RSA_private_decrypt %s\n", decryptMsg); }RSA_free(publicRsa);RSA_free(privateRsa);return 0; }

? ? ? ? 9.RSA編程示例(PEM文件方式多線程測試樣例)

#include <cstdio> #include <cstring> #include <pthread.h> #include <openssl/rsa.h> #include <openssl/pem.h> #include <openssl/err.h> #define PRIKEY "prikey.pem" #define PUBKEY "pubkey.pem"RSA *publicRsa = NULL; RSA *privateRsa = NULL;void* rsaThreadOne(void* param) { unsigned char *source = (unsigned char *)param;int rsa_len = RSA_size(publicRsa);unsigned char *encryptMsg = (unsigned char *)malloc(rsa_len);memset(encryptMsg, 0, rsa_len);int len = rsa_len - 11;if (RSA_public_encrypt(len, source, encryptMsg, publicRsa, RSA_PKCS1_PADDING) < 0){printf("rsaThreadOne RSA_public_encrypt error\n");return 0;}rsa_len = RSA_size(privateRsa);unsigned char *decryptMsg = (unsigned char *)malloc(rsa_len);memset(decryptMsg, 0, rsa_len);int mun = RSA_private_decrypt(rsa_len, encryptMsg, decryptMsg, privateRsa, RSA_PKCS1_PADDING);if ( mun < 0){printf("rsaThreadOne RSA_private_decrypt error\n");return 0;}else {printf("rsaThreadOne %s\n", decryptMsg);}return 0; }void* rsaThreadTwo(void* param) { unsigned char *source = (unsigned char *)param;int rsa_len = RSA_size(publicRsa);unsigned char *encryptMsg = (unsigned char *)malloc(rsa_len);memset(encryptMsg, 0, rsa_len);int len = rsa_len - 11;if (RSA_public_encrypt(len, source, encryptMsg, publicRsa, RSA_PKCS1_PADDING) < 0){printf("rsaThreadTwo RSA_public_encrypt error\n");return 0;}rsa_len = RSA_size(privateRsa);unsigned char *decryptMsg = (unsigned char *)malloc(rsa_len);memset(decryptMsg, 0, rsa_len);int mun = RSA_private_decrypt(rsa_len, encryptMsg, decryptMsg, privateRsa, RSA_PKCS1_PADDING);if ( mun < 0){printf("rsaThreadTwo RSA_private_decrypt error\n");return 0;}else {printf("rsaThreadTwo %s\n", decryptMsg);} return 0; }int main(int argc, char *argv[]) {FILE *fp = NULL;if ((fp = fopen(PUBKEY, "r")) == NULL) {printf("pubkey_path error\n");return -1;} if ((publicRsa = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {printf("PEM_read_RSA_PUBKEY error\n");return -1;}fclose(fp);if ((fp = fopen(PRIKEY, "r")) == NULL) {printf("prikey_path error\n");return -1;}OpenSSL_add_all_algorithms();//密鑰有經(jīng)過口令加密需要這個函數(shù)if ((privateRsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, (char *)"8888")) == NULL) {printf("PEM_read_RSAPrivateKey error\n");return NULL;}fclose(fp);pthread_t tid1 ;pthread_t tid2 ;pthread_create(&tid1, NULL, rsaThreadOne, (void *)"123456789");pthread_create(&tid2, NULL, rsaThreadTwo, (void *)"987654321");pthread_join(tid1,NULL); pthread_join(tid2,NULL);return 0; }

? ? ? ? ? 10.相應(yīng)參考文章、文檔

? ? ? ? ? ? ? ?嗨！大佟！博客
? ? ? ? ? ? ? ?wjlkoorey的博客
? ? ? ? ? ? ? ?需要翻墻才能訪問的openssl github

轉(zhuǎn)載地址:https://blog.csdn.net/aqlick12/article/details/78480505

?

在實際的編譯過程中，出現(xiàn)了如下的錯誤:

參考了https://bugs.php.net/bug.php?id=15780鏈接中的第一條回復(fù)，發(fā)現(xiàn)我的系統(tǒng)中有兩個openssl版本，所以需要確保include的東西和link的東西版本保持一致。故加了-I/usr/local/openssl/include之后,問題消失,如下:

總結(jié)

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