在OS X上使用gcc的OpenSSL 10.7

Question

我在OS X 10.7上使用TextEdit和gcc來製作小型終端程序。我正試圖學習如何編程OpenSSL，但我正在編譯劇集（由於不推薦使用的問題 - 更多）。我搜索了谷歌搜索，但我所讀的一切都是在2011年之前（當問題出現時），特定於iOS（我正在爲OS X編程，但嘗試獨立於平臺）或談論使用XCode（我不 - 我更喜歡TextEdit）。

任何人都可以請指出一個簡單的，一步一步的過程如何在OS X上使用gcc安裝OpenSSL程序的正確方向？

根據記錄，這是我所採取的具體步驟：通過MacPorts的

'OpenSSL的版本' 安裝

• OpenSSL的返回 「的OpenSSL 1.0.1e 2013年2月11日」

• 我試圖編譯這個文件：http://saju.net.in/code/misc/openssl_aes.c.txt

• 我已經改名爲'aes.c'，我使用'g立方厘米-o AES aes.c」

• 我嘗試了以下標誌（有結果）：-lcrypto，lssl，-Wno誤差=棄用-聲明

的具體輸出I從GCC得到的是以下幾點：

Brads-MacBook-Air:Desktop brad$ gcc -o aes aes.c -lssl -lcrypto -Wno-error=deprecated-declarations 
aes.c: In function ‘aes_init’: 
aes.c:30: warning: ‘EVP_BytesToKey’ is deprecated (declared at /usr/include/openssl/evp.h:572) 
aes.c:30: warning: ‘EVP_aes_256_cbc’ is deprecated (declared at /usr/include/openssl/evp.h:786) 
aes.c:30: warning: ‘EVP_sha1’ is deprecated (declared at /usr/include/openssl/evp.h:666) 
aes.c:36: warning: ‘EVP_CIPHER_CTX_init’ is deprecated (declared at /usr/include/openssl/evp.h:636) 
aes.c:37: warning: ‘EVP_EncryptInit_ex’ is deprecated (declared at /usr/include/openssl/evp.h:581) 
aes.c:37: warning: ‘EVP_aes_256_cbc’ is deprecated (declared at /usr/include/openssl/evp.h:786) 
aes.c:38: warning: ‘EVP_CIPHER_CTX_init’ is deprecated (declared at /usr/include/openssl/evp.h:636) 
aes.c:39: warning: ‘EVP_DecryptInit_ex’ is deprecated (declared at /usr/include/openssl/evp.h:590) 
aes.c:39: warning: ‘EVP_aes_256_cbc’ is deprecated (declared at /usr/include/openssl/evp.h:786) 
aes.c: In function ‘aes_encrypt’: 
aes.c:51: error: ‘AES_BLOCK_SIZE’ undeclared (first use in this function) 
aes.c:51: error: (Each undeclared identifier is reported only once 
aes.c:51: error: for each function it appears in.) 
aes.c:55: warning: ‘EVP_EncryptInit_ex’ is deprecated (declared at /usr/include/openssl/evp.h:581) 
aes.c:59: warning: ‘EVP_EncryptUpdate’ is deprecated (declared at /usr/include/openssl/evp.h:583) 
aes.c:62: warning: ‘EVP_EncryptFinal_ex’ is deprecated (declared at /usr/include/openssl/evp.h:584) 
aes.c: In function ‘aes_decrypt’: 
aes.c:75: error: ‘AES_BLOCK_SIZE’ undeclared (first use in this function) 
aes.c:77: warning: ‘EVP_DecryptInit_ex’ is deprecated (declared at /usr/include/openssl/evp.h:590) 
aes.c:78: warning: ‘EVP_DecryptUpdate’ is deprecated (declared at /usr/include/openssl/evp.h:592) 
aes.c:79: warning: ‘EVP_DecryptFinal_ex’ is deprecated (declared at /usr/include/openssl/evp.h:594) 
aes.c: In function ‘main’: 
aes.c:136: warning: ‘EVP_CIPHER_CTX_cleanup’ is deprecated (declared at /usr/include/openssl/evp.h:637) 
aes.c:137: warning: ‘EVP_CIPHER_CTX_cleanup’ is deprecated (declared at /usr/include/openssl/evp.h:637) 

Answer 1

的廢棄警告是正義的，警告，可以忽略不計。真正的問題是，編譯器無法看到AES_BLOCK_SIZE宏的定義爲aes.h的聲明。所以你需要添加一個#include <openssl/aes.h>到你的源代碼。

您還需要包含-lcrypto鏈接器標誌以鏈接到OpenSSL運行時庫;否則，你會得到一堆「未定義的參考」錯誤。