md5, sha1, sha256, sha512: use openssl routines if available --with-openssl the libcrypto md5, sha1, sha224, sha256, sha384, sha256 routines will be used if available, requiring apps to link @LIB_CRYPTO@ * lib/gl_openssl.h: Provide wrappers for specified openssl hash. * m4/gl-openssl.m4 (gl_CRYPTO_CHECK): New function to lookup libcrypto in the standard system location. * m4/sha1.m4: Call gl_CRYPTO_CHECK() for SHA1. * m4/sha256.m4: Likewise with SHA256. * m4/sha512.m4: Likewise with SHA512. * m4/md5.m4: Likewise with MD5. * m4/gc.m4: Ensure @LIB_CRYPTO@ set for tests. * lib/sha1.h: Include wrappers if HAVE_OPENSSL_SHA1. * lib/sha256.h: Likewise with SHA256. * lib/sha512.h: Likewise with SHA512. * lib/md5.h: Likewise with MD5. * lib/sha1.c: Exlude functionality if HAVE_OPENSSL_SHA1. * lib/sha256.c: Likewise with SHA256. * lib/sha512.c: Likewise with SHA512. * lib/md5.c: Likewise with MD5. * modules/crypto/sha1 (Link:): Add the new optional lib. (Depends-on:): Add dependency on extern-inline. * modules/crypto/sha256: Likewise. * modules/crypto/sha512: Likewise. * modules/crypto/md5: Likewise. * modules/crypto/sha1-tests: Reference the lib here too. * modules/crypto/md5-tests: Likewise. * modules/crypto/gc-des-tests: Likewise. * modules/crypto/gc-hmac-md5-tests: Likewise. * modules/crypto/gc-hmac-sha1-tests: Likewise. * modules/crypto/gc-hmac-sha256-tests: Likewise. * modules/crypto/gc-hmac-sha512-tests: Likewise. * modules/crypto/gc-md5-tests: Likewise. * modules/crypto/gc-pbkdf2-sha1-tests: Likewise. * modules/crypto/gc-sha1-tests: Likewise. * modules/crypto/gc-tests: Likewise. * modules/crypto/hmac-md5-tests: Likewise. * modules/crypto/hmac-sha1-tests: Likewise. * modules/crypto/hmac-sha256-tests: Likewise. * modules/crypto/hmac-sha512-tests: Likewise.

--- a/lib/md5.c	Fri Nov 29 15:35:33 2013 +0000
+++ b/lib/md5.c	Sat Nov 30 05:19:32 2013 +0000
@@ -21,6 +21,9 @@
 
 #include <config.h>
 
+#if HAVE_OPENSSL_MD5
+# define GL_OPENSSL_INLINE _GL_EXTERN_INLINE
+#endif
 #include "md5.h"
 
 #include <stdalign.h>
@@ -61,6 +64,7 @@
 # error "invalid BLOCKSIZE"
 #endif
 
+#if ! HAVE_OPENSSL_MD5
 /* This array contains the bytes used to pad the buffer to the next
    64-byte boundary.  (RFC 1321, 3.1: Step 1)  */
 static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ...  */ };
@@ -128,6 +132,7 @@
 
   return md5_read_ctx (ctx, resbuf);
 }
+#endif
 
 /* Compute MD5 message digest for bytes read from STREAM.  The
    resulting message digest number will be written into the 16 bytes
@@ -202,6 +207,7 @@
   return 0;
 }
 
+#if ! HAVE_OPENSSL_MD5
 /* Compute MD5 message digest for LEN bytes beginning at BUFFER.  The
    result is always in little endian byte order, so that a byte-wise
    output yields to the wanted ASCII representation of the message
@@ -459,3 +465,4 @@
   ctx->C = C;
   ctx->D = D;
 }
+#endif