Talk:OpenSSL 1.1.0 Changes
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Revision as of 21:53, 3 April 2017 by Jwalton (talk | contribs) (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.)
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)
