Difference between revisions of "Talk:OpenSSL 1.1.0 Changes"

From OpenSSLWiki
Jump to navigationJump to search
m (the #ifdef mention is enough)
m (Jwalton moved page Talk:1.1 API Changes to Talk:OpenSSL 1.1.0 Changes: Tweak page title. The change eases citing the wiki on sites like Stack Overflow.)
(No difference)

Revision as of 21:53, 3 April 2017

Converting code to be compatible with both OpenSSL 1.0.x and 1.1.x

Small correction to the example at 1.1_API_Changes#Adding_forward-compatible_code_to_older_versions:

HMAC_CTX_reset, and EVP_MD_CTX_free are OpenSSL 1.1 APIs themselves so their use should be avoided in the #if section.

Suggested example: 

#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined (LIBRESSL_VERSION_NUMBER)
static HMAC_CTX *HMAC_CTX_new(void)
{
   HMAC_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
   if (ctx != NULL)
       HMAC_CTX_init(ctx);
   return ctx;
}

static void HMAC_CTX_free(HMAC_CTX *ctx)
{
   if (ctx != NULL) {
       HMAC_CTX_cleanup(ctx);
       OPENSSL_free(ctx);
   }
}
#endif

Similarly examples for other APIs that I encountered: 

#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined (LIBRESSL_VERSION_NUMBER)
#define EVP_MD_CTX_new EVP_MD_CTX_create
#define EVP_MD_CTX_free EVP_MD_CTX_destroy
#endif

#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
#define ASN1_STRING_get0_data(x) ASN1_STRING_data(x)
#endif

--Edwintorok (talk) 13:30, 23 September 2016 (UTC)

Retrieved from "https://wiki.openssl.org/index.php?title=Talk:OpenSSL_1.1.0_Changes&oldid=2542"