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metalink: fix NSS issue in MultiSSL builds

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In MultiSSL mode (i.e. when more than one SSL backend is compiled
in), we cannot use the compile time flag `USE_NSS` as indicator that
the NSS backend is in use. As far as Metalink is concerned, the SSL
backend is only used for MD5, SHA-1 and SHA-256 calculations,
therefore one of the available SSL backends is selected at compile
time, in a strict order of preference.

Let's introduce a new `HAVE_NSS_CONTEXT` constant that can be used
to determine whether the SSL backend used for Metalink is the NSS
backend, and use that to guard the code that wants to de-initialize
the NSS-specific data structure.

Ref: https://github.com/curl/curl/pull/1848
This commit is contained in:
Viktor Szakats 2017-09-12 18:14:00 +00:00
parent 6f86022df2
commit de47158934
1 changed files with 4 additions and 1 deletions
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5
src/tool_metalink.c
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@ -30,6 +30,8 @@
# include <fcntl.h>
#endif
#undef HAVE_NSS_CONTEXT
#ifdef USE_OPENSSL
# include <openssl/md5.h>
# include <openssl/sha.h>
@ -50,6 +52,7 @@
# define MD5_CTX void *
# define SHA_CTX void *
# define SHA256_CTX void *
# define HAVE_NSS_CONTEXT
static NSSInitContext *nss_context;
#elif defined(USE_POLARSSL)
# include <polarssl/md5.h>
@ -967,7 +970,7 @@ void clean_metalink(struct OperationConfig *config)
void metalink_cleanup(void)
{
#ifdef USE_NSS
#ifdef HAVE_NSS_CONTEXT
if(nss_context) {
NSS_ShutdownContext(nss_context);
nss_context = NULL;