--- /dev/null
+diff --git a/crypto/hash/hmac.c b/crypto/hash/hmac.c
+index 4f389fe..5ab81e5 100644
+--- a/crypto/hash/hmac.c
++++ b/crypto/hash/hmac.c
+@@ -137,10 +137,10 @@ hmac_init(hmac_ctx_t *state, const uint8_t *key, int key_len) {
+ debug_print(mod_hmac, "ipad: %s", octet_string_hex_string(ipad, 64));
+
+ /* initialize sha1 context */
+- sha1_init(&state->init_ctx);
++ srtp_sha1_init(&state->init_ctx);
+
+ /* hash ipad ^ key */
+- sha1_update(&state->init_ctx, ipad, 64);
++ srtp_sha1_update(&state->init_ctx, ipad, 64);
+ memcpy(&state->ctx, &state->init_ctx, sizeof(sha1_ctx_t));
+
+ return err_status_ok;
+@@ -161,7 +161,7 @@ hmac_update(hmac_ctx_t *state, const uint8_t *message, int msg_octets) {
+ octet_string_hex_string(message, msg_octets));
+
+ /* hash message into sha1 context */
+- sha1_update(&state->ctx, message, msg_octets);
++ srtp_sha1_update(&state->ctx, message, msg_octets);
+
+ return err_status_ok;
+ }
+@@ -179,7 +179,7 @@ hmac_compute(hmac_ctx_t *state, const void *message,
+
+ /* hash message, copy output into H */
+ hmac_update(state, (const uint8_t*)message, msg_octets);
+- sha1_final(&state->ctx, H);
++ srtp_sha1_final(&state->ctx, H);
+
+ /*
+ * note that we don't need to debug_print() the input, since the
+@@ -189,16 +189,16 @@ hmac_compute(hmac_ctx_t *state, const void *message,
+ octet_string_hex_string((uint8_t *)H, 20));
+
+ /* re-initialize hash context */
+- sha1_init(&state->ctx);
++ srtp_sha1_init(&state->ctx);
+
+ /* hash opad ^ key */
+- sha1_update(&state->ctx, (uint8_t *)state->opad, 64);
++ srtp_sha1_update(&state->ctx, (uint8_t *)state->opad, 64);
+
+ /* hash the result of the inner hash */
+- sha1_update(&state->ctx, (uint8_t *)H, 20);
++ srtp_sha1_update(&state->ctx, (uint8_t *)H, 20);
+
+ /* the result is returned in the array hash_value[] */
+- sha1_final(&state->ctx, hash_value);
++ srtp_sha1_final(&state->ctx, hash_value);
+
+ /* copy hash_value to *result */
+ for (i=0; i < tag_len; i++)
+diff --git a/crypto/hash/sha1.c b/crypto/hash/sha1.c
+index b9a8d10..b1c9c8a 100644
+--- a/crypto/hash/sha1.c
++++ b/crypto/hash/sha1.c
+@@ -74,12 +74,12 @@ uint32_t SHA_K2 = 0x8F1BBCDC; /* Kt for 40 <= t <= 59 */
+ uint32_t SHA_K3 = 0xCA62C1D6; /* Kt for 60 <= t <= 79 */
+
+ void
+-sha1(const uint8_t *msg, int octets_in_msg, uint32_t hash_value[5]) {
++srtp_sha1(const uint8_t *msg, int octets_in_msg, uint32_t hash_value[5]) {
+ sha1_ctx_t ctx;
+
+- sha1_init(&ctx);
+- sha1_update(&ctx, msg, octets_in_msg);
+- sha1_final(&ctx, hash_value);
++ srtp_sha1_init(&ctx);
++ srtp_sha1_update(&ctx, msg, octets_in_msg);
++ srtp_sha1_final(&ctx, hash_value);
+
+ }
+
+@@ -96,7 +96,7 @@ sha1(const uint8_t *msg, int octets_in_msg, uint32_t hash_value[5]) {
+ */
+
+ void
+-sha1_core(const uint32_t M[16], uint32_t hash_value[5]) {
++srtp_sha1_core(const uint32_t M[16], uint32_t hash_value[5]) {
+ uint32_t H0;
+ uint32_t H1;
+ uint32_t H2;
+@@ -183,7 +183,7 @@ sha1_core(const uint32_t M[16], uint32_t hash_value[5]) {
+ }
+
+ void
+-sha1_init(sha1_ctx_t *ctx) {
++srtp_sha1_init(sha1_ctx_t *ctx) {
+
+ /* initialize state vector */
+ ctx->H[0] = 0x67452301;
+@@ -201,7 +201,7 @@ sha1_init(sha1_ctx_t *ctx) {
+ }
+
+ void
+-sha1_update(sha1_ctx_t *ctx, const uint8_t *msg, int octets_in_msg) {
++srtp_sha1_update(sha1_ctx_t *ctx, const uint8_t *msg, int octets_in_msg) {
+ int i;
+ uint8_t *buf = (uint8_t *)ctx->M;
+
+@@ -226,7 +226,7 @@ sha1_update(sha1_ctx_t *ctx, const uint8_t *msg, int octets_in_msg) {
+
+ debug_print(mod_sha1, "(update) running sha1_core()", NULL);
+
+- sha1_core(ctx->M, ctx->H);
++ srtp_sha1_core(ctx->M, ctx->H);
+
+ } else {
+
+@@ -249,7 +249,7 @@ sha1_update(sha1_ctx_t *ctx, const uint8_t *msg, int octets_in_msg) {
+ */
+
+ void
+-sha1_final(sha1_ctx_t *ctx, uint32_t *output) {
++srtp_sha1_final(sha1_ctx_t *ctx, uint32_t *output) {
+ uint32_t A, B, C, D, E, TEMP;
+ uint32_t W[80];
+ int i, t;
+diff --git a/crypto/include/sha1.h b/crypto/include/sha1.h
+index e3af4d4..af59b7e 100644
+--- a/crypto/include/sha1.h
++++ b/crypto/include/sha1.h
+@@ -65,7 +65,7 @@ typedef struct {
+ */
+
+ void
+-sha1(const uint8_t *message, int octets_in_msg, uint32_t output[5]);
++srtp_sha1(const uint8_t *message, int octets_in_msg, uint32_t output[5]);
+
+ /*
+ * sha1_init(&ctx) initializes the SHA1 context ctx
+@@ -79,13 +79,13 @@ sha1(const uint8_t *message, int octets_in_msg, uint32_t output[5]);
+ */
+
+ void
+-sha1_init(sha1_ctx_t *ctx);
++srtp_sha1_init(sha1_ctx_t *ctx);
+
+ void
+-sha1_update(sha1_ctx_t *ctx, const uint8_t *M, int octets_in_msg);
++srtp_sha1_update(sha1_ctx_t *ctx, const uint8_t *M, int octets_in_msg);
+
+ void
+-sha1_final(sha1_ctx_t *ctx, uint32_t output[5]);
++srtp_sha1_final(sha1_ctx_t *ctx, uint32_t output[5]);
+
+ /*
+ * The sha1_core function is INTERNAL to SHA-1, but it is declared
+@@ -103,6 +103,6 @@ sha1_final(sha1_ctx_t *ctx, uint32_t output[5]);
+ */
+
+ void
+-sha1_core(const uint32_t M[16], uint32_t hash_value[5]);
++srtp_sha1_core(const uint32_t M[16], uint32_t hash_value[5]);
+
+ #endif /* SHA1_H */
+diff --git a/crypto/test/sha1_driver.c b/crypto/test/sha1_driver.c
+index 6036022..f29d76e 100644
+--- a/crypto/test/sha1_driver.c
++++ b/crypto/test/sha1_driver.c
+@@ -107,9 +107,9 @@ sha1_test_case_validate(const hash_test_case_t *test_case) {
+ if (test_case->data_len > MAX_HASH_DATA_LEN)
+ return err_status_bad_param;
+
+- sha1_init(&ctx);
+- sha1_update(&ctx, test_case->data, test_case->data_len);
+- sha1_final(&ctx, hash_value);
++ srtp_sha1_init(&ctx);
++ srtp_sha1_update(&ctx, test_case->data, test_case->data_len);
++ srtp_sha1_final(&ctx, hash_value);
+ if (0 == memcmp(test_case->hash, hash_value, 20)) {
+ #if VERBOSE
+ printf("PASSED: reference value: %s\n",