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From 91f663ce1b46ecd99399023ad539f158419272e7 Mon Sep 17 00:00:00 2001
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From: Alexander Scheel <ascheel@redhat.com>
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Date: Fri, 28 Sep 2018 11:03:52 -0400
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Subject: [PATCH 2/2] Replace HMAC-SHA1 implementation with OpenSSL's
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If OpenSSL EVP is not found, fallback to internal implementation of
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HMAC-SHA1.
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Signed-off-by: Alexander Scheel <ascheel@redhat.com>
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---
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src/lib/hmacsha1.c | 29 ++++++++++++++++++++++++++++-
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1 file changed, 28 insertions(+), 1 deletion(-)
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diff --git a/src/lib/hmacsha1.c b/src/lib/hmacsha1.c
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index c3cbd87a2c..211470ea35 100644
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--- a/src/lib/hmacsha1.c
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+++ b/src/lib/hmacsha1.c
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@@ -10,13 +10,19 @@
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RCSID("$Id: c3cbd87a2c13c47da93fdb1bdfbf6da4c22aaac5 $")
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+#ifdef HAVE_OPENSSL_EVP_H
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+#include <openssl/hmac.h>
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+#include <openssl/evp.h>
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+#endif
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+
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#include <freeradius-devel/libradius.h>
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#ifdef HMAC_SHA1_DATA_PROBLEMS
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unsigned int sha1_data_problems = 0;
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#endif
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-/** Calculate HMAC using SHA1
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+#ifdef HAVE_OPENSSL_EVP_H
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+/** Calculate HMAC using OpenSSL's SHA1 implementation
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*
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* @param digest Caller digest to be filled in.
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* @param text Pointer to data stream.
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@@ -28,6 +34,26 @@
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void fr_hmac_sha1(uint8_t digest[SHA1_DIGEST_LENGTH], uint8_t const *text, size_t text_len,
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uint8_t const *key, size_t key_len)
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{
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+ HMAC_CTX *ctx = HMAC_CTX_new();
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+ HMAC_Init_ex(ctx, key, key_len, EVP_sha1(), NULL);
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+ HMAC_Update(ctx, text, text_len);
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+ HMAC_Final(ctx, digest, NULL);
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+ HMAC_CTX_free(ctx);
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+}
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+
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+#else
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+
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+/** Calculate HMAC using internal SHA1 implementation
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+ *
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+ * @param digest Caller digest to be filled in.
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+ * @param text Pointer to data stream.
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+ * @param text_len length of data stream.
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+ * @param key Pointer to authentication key.
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+ * @param key_len Length of authentication key.
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+ */
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+void fr_hmac_sha1(uint8_t digest[SHA1_DIGEST_LENGTH], uint8_t const *text, size_t text_len,
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+ uint8_t const *key, size_t key_len)
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+{
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fr_sha1_ctx context;
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uint8_t k_ipad[65]; /* inner padding - key XORd with ipad */
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uint8_t k_opad[65]; /* outer padding - key XORd with opad */
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@@ -142,6 +168,7 @@
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}
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#endif
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}
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+#endif /* HAVE_OPENSSL_EVP_H */
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/*
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Test Vectors (Trailing '\0' of a character string not included in test):
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