implement hashlib for picow

Author: jepler

ports/raspberrypi/boards/raspberry_pi_pico_w/mpconfigboard.mk

@@ -13,7 +13,7 @@ CIRCUITPY__EVE = 1
 CIRCUITPY_CYW43 = 1
 CIRCUITPY_SSL = 1
 CIRCUITPY_SSL_MBEDTLS = 1
-CIRCUITPY_HASHLIB = 0
+CIRCUITPY_HASHLIB = 1
 CIRCUITPY_WEB_WORKFLOW = 0
 CIRCUITPY_MDNS = 0
 CIRCUITPY_SOCKETPOOL = 1

ports/raspberrypi/common-hal/hashlib/Hash.c

@@ -0,0 +1,57 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/hashlib/Hash.h"
+
+#include "mbedtls/ssl.h"
+
+void common_hal_hashlib_hash_update(hashlib_hash_obj_t *self, const uint8_t *data, size_t datalen) {
+    if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
+        mbedtls_sha1_update_ret(&self->sha1, data, datalen);
+        return;
+    }
+}
+
+void common_hal_hashlib_hash_digest(hashlib_hash_obj_t *self, uint8_t *data, size_t datalen) {
+    if (datalen < common_hal_hashlib_hash_get_digest_size(self)) {
+        return;
+    }
+    if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
+        // We copy the sha1 state so we can continue to update if needed or get
+        // the digest a second time.
+        mbedtls_sha1_context copy;
+        mbedtls_sha1_clone(&copy, &self->sha1);
+        mbedtls_sha1_finish_ret(&self->sha1, data);
+        mbedtls_sha1_clone(&self->sha1, &copy);
+    }
+}
+
+size_t common_hal_hashlib_hash_get_digest_size(hashlib_hash_obj_t *self) {
+    if (self->hash_type == MBEDTLS_SSL_HASH_SHA1) {
+        return 20;
+    }
+    return 0;
+}

ports/raspberrypi/common-hal/hashlib/Hash.h

@@ -0,0 +1,38 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Jeff Epler for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "mbedtls/sha1.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    union {
+        mbedtls_sha1_context sha1;
+    };
+    // Of MBEDTLS_SSL_HASH_*
+    uint8_t hash_type;
+} hashlib_hash_obj_t;

ports/raspberrypi/common-hal/hashlib/__init__.c

@@ -0,0 +1,40 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/hashlib/__init__.h"
+
+#include "mbedtls/ssl.h"
+
+
+bool common_hal_hashlib_new(hashlib_hash_obj_t *self, const char *algorithm) {
+    if (strcmp(algorithm, "sha1") == 0) {
+        self->hash_type = MBEDTLS_SSL_HASH_SHA1;
+        mbedtls_sha1_init(&self->sha1);
+        mbedtls_sha1_starts_ret(&self->sha1);
+        return true;
+    }
+    return false;
+}