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openssl: retrieve reported LibreSSL version at runtime

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- Retrieve LibreSSL runtime version when supported (>= 2.7.1).

For earlier versions we continue to use the compile-time version.

Ref: https://man.openbsd.org/OPENSSL_VERSION_NUMBER.3

Closes https://github.com/curl/curl/pull/2425
This commit is contained in:
Jay Satiro 2018-03-24 00:57:42 -04:00
parent 5b22e1a5a9
commit 0436d4438a
1 changed files with 24 additions and 6 deletions
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30
lib/vtls/openssl.c
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@ -142,10 +142,6 @@
#endif
#endif
#ifdef LIBRESSL_VERSION_NUMBER
#define OpenSSL_version_num() LIBRESSL_VERSION_NUMBER
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x1000200fL) && /* 1.0.2 or later */ \
!(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER < 0x20700000L)
@ -3975,13 +3971,35 @@ static ssize_t ossl_recv(struct connectdata *conn, /* connection data */
static size_t Curl_ossl_version(char *buffer, size_t size)
{
#ifdef OPENSSL_IS_BORINGSSL
#ifdef LIBRESSL_VERSION_NUMBER
#if LIBRESSL_VERSION_NUMBER < 0x2070100fL
return msnprintf(buffer, size, "%s/%lx.%lx.%lx",
OSSL_PACKAGE,
(LIBRESSL_VERSION_NUMBER>>28)&0xf,
(LIBRESSL_VERSION_NUMBER>>20)&0xff,
(LIBRESSL_VERSION_NUMBER>>12)&0xff);
#else /* OpenSSL_version() first appeared in LibreSSL 2.7.1 */
char *p;
int count;
const char *ver = OpenSSL_version(OPENSSL_VERSION);
const char expected[] = OSSL_PACKAGE " "; /* ie "LibreSSL " */
if(Curl_strncasecompare(ver, expected, sizeof(expected) - 1)) {
ver += sizeof(expected) - 1;
}
count = msnprintf(buffer, size, "%s/%s", OSSL_PACKAGE, ver);
for(p = buffer; *p; ++p) {
if(ISSPACE(*p))
*p = '_';
}
return count;
#endif
#elif defined(OPENSSL_IS_BORINGSSL)
return msnprintf(buffer, size, OSSL_PACKAGE);
#elif defined(HAVE_OPENSSL_VERSION) && defined(OPENSSL_VERSION_STRING)
return msnprintf(buffer, size, "%s/%s",
OSSL_PACKAGE, OpenSSL_version(OPENSSL_VERSION_STRING));
#else
/* not BoringSSL and not using OpenSSL_version */
/* not LibreSSL, BoringSSL and not using OpenSSL_version */
char sub[3];
unsigned long ssleay_value;