diff --git a/firmware/lib/cryptolib/include/sha.h b/firmware/lib/cryptolib/include/sha.h
index a816471..3ff2b5b 100644
--- a/firmware/lib/cryptolib/include/sha.h
+++ b/firmware/lib/cryptolib/include/sha.h
@@ -69,19 +69,19 @@
  * and stores it into [digest]. [digest] should be pre-allocated to
  * SHA1_DIGEST_SIZE bytes.
  */
-uint8_t* SHA1(const uint8_t* data, uint64_t len, uint8_t* digest);
+uint8_t* internal_SHA1(const uint8_t* data, uint64_t len, uint8_t* digest);
 
 /* Convenience function for SHA-256.  Computes hash on [data] of length [len].
  * and stores it into [digest]. [digest] should be pre-allocated to
  * SHA256_DIGEST_SIZE bytes.
  */
-uint8_t* SHA256(const uint8_t* data, uint64_t len, uint8_t* digest);
+uint8_t* internal_SHA256(const uint8_t* data, uint64_t len, uint8_t* digest);
 
 /* Convenience function for SHA-512.  Computes hash on [data] of length [len].
  * and stores it into [digest]. [digest] should be pre-allocated to
  * SHA512_DIGEST_SIZE bytes.
  */
-uint8_t* SHA512(const uint8_t* data, uint64_t len, uint8_t* digest);
+uint8_t* internal_SHA512(const uint8_t* data, uint64_t len, uint8_t* digest);
 
 
 /*---- Utility functions/wrappers for message digests. */
diff --git a/firmware/lib/cryptolib/sha1.c b/firmware/lib/cryptolib/sha1.c
index 897742c..fa7e665 100644
--- a/firmware/lib/cryptolib/sha1.c
+++ b/firmware/lib/cryptolib/sha1.c
@@ -273,7 +273,7 @@
   ctx->count = 0;
 }
 
-uint8_t* SHA1(const uint8_t *data, uint64_t len, uint8_t *digest) {
+uint8_t* internal_SHA1(const uint8_t *data, uint64_t len, uint8_t *digest) {
   const uint8_t *p;
   int i;
   SHA1_CTX ctx;
diff --git a/firmware/lib/cryptolib/sha256.c b/firmware/lib/cryptolib/sha256.c
index fdd570f..9b01380 100644
--- a/firmware/lib/cryptolib/sha256.c
+++ b/firmware/lib/cryptolib/sha256.c
@@ -310,7 +310,7 @@
    return ctx->buf;
 }
 
-uint8_t* SHA256(const uint8_t* data, uint64_t len, uint8_t* digest) {
+uint8_t* internal_SHA256(const uint8_t* data, uint64_t len, uint8_t* digest) {
   const uint8_t* input_ptr;
   const uint8_t* result;
   uint64_t remaining_len;
diff --git a/firmware/lib/cryptolib/sha512.c b/firmware/lib/cryptolib/sha512.c
index 851cca8..25dcd38 100644
--- a/firmware/lib/cryptolib/sha512.c
+++ b/firmware/lib/cryptolib/sha512.c
@@ -336,7 +336,7 @@
 }
 
 
-uint8_t* SHA512(const uint8_t* data, uint64_t len, uint8_t* digest) {
+uint8_t* internal_SHA512(const uint8_t* data, uint64_t len, uint8_t* digest) {
   const uint8_t* input_ptr;
   const uint8_t* result;
   uint64_t remaining_len;
diff --git a/firmware/lib/cryptolib/sha_utility.c b/firmware/lib/cryptolib/sha_utility.c
index c676040..bd7e140 100644
--- a/firmware/lib/cryptolib/sha_utility.c
+++ b/firmware/lib/cryptolib/sha_utility.c
@@ -91,24 +91,24 @@
     0,
     0,
     0,  /* RSA 4096 */
-    SHA256,
+    internal_SHA256,
     0,
     0,  /* RSA 8192 */
     0,
     0,
 #else
-    SHA1,  /* RSA 1024 */
-    SHA256,
-    SHA512,
-    SHA1,  /* RSA 2048 */
-    SHA256,
-    SHA512,
-    SHA1,  /* RSA 4096 */
-    SHA256,
-    SHA512,
-    SHA1,  /* RSA 8192 */
-    SHA256,
-    SHA512,
+    internal_SHA1,  /* RSA 1024 */
+    internal_SHA256,
+    internal_SHA512,
+    internal_SHA1,  /* RSA 2048 */
+    internal_SHA256,
+    internal_SHA512,
+    internal_SHA1,  /* RSA 4096 */
+    internal_SHA256,
+    internal_SHA512,
+    internal_SHA1,  /* RSA 8192 */
+    internal_SHA256,
+    internal_SHA512,
 #endif
   };
   /* Call the appropriate hash function. */
diff --git a/tests/sha_benchmark.c b/tests/sha_benchmark.c
index 9f4da36..a5bfc53 100644
--- a/tests/sha_benchmark.c
+++ b/tests/sha_benchmark.c
@@ -21,9 +21,9 @@
 } HashFxTable;
 
 HashFxTable hash_functions[NUM_HASH_ALGORITHMS] = {
-  {SHA1, "sha1"},
-  {SHA256, "sha256"},
-  {SHA512, "sha512"}
+  {internal_SHA1, "sha1"},
+  {internal_SHA256, "sha256"},
+  {internal_SHA512, "sha512"}
 };
 
 int main(int argc, char* argv[]) {
diff --git a/tests/sha_tests.c b/tests/sha_tests.c
index 65cbb46..6cc7e0f 100644
--- a/tests/sha_tests.c
+++ b/tests/sha_tests.c
@@ -21,7 +21,7 @@
   test_inputs[2] = (uint8_t *) long_msg;
 
   for (i = 0; i < 3; i++) {
-    SHA1(test_inputs[i], strlen((char *)test_inputs[i]),
+    internal_SHA1(test_inputs[i], strlen((char *)test_inputs[i]),
          sha1_digest);
     if (!memcmp(sha1_digest, sha1_results[i], SHA1_DIGEST_SIZE)) {
       fprintf(stderr, "Test vector %d PASSED for SHA-1\n", i+1);
@@ -43,7 +43,7 @@
   test_inputs[2] = (uint8_t *) long_msg;
 
   for (i = 0; i < 3; i++) {
-    SHA256(test_inputs[i], strlen((char *)test_inputs[i]),
+    internal_SHA256(test_inputs[i], strlen((char *)test_inputs[i]),
            sha256_digest);
     if (!memcmp(sha256_digest, sha256_results[i], SHA256_DIGEST_SIZE)) {
       fprintf(stderr, "Test vector %d PASSED for SHA-256\n", i+1);
@@ -65,7 +65,7 @@
   test_inputs[2] = (uint8_t *) long_msg;
 
   for (i = 0; i < 3; i++) {
-    SHA512(test_inputs[i], strlen((char *)test_inputs[i]),
+    internal_SHA512(test_inputs[i], strlen((char *)test_inputs[i]),
            sha512_digest);
     if (!memcmp(sha512_digest, sha512_results[i], SHA512_DIGEST_SIZE)) {
       fprintf(stderr, "Test vector %d PASSED for SHA-512\n", i+1);