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sha256.h

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+/*
+ * OpenSSL compatible SHA256 header
+ * 
+ * Copyright (c) 2017 Fabrice Bellard
+ *
+ * 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.
+ */
+#ifndef SHA256_H
+#define SHA256_H
+
+#define SHA256_DIGEST_LENGTH 32
+
+typedef struct {
+    uint64_t length;
+    uint32_t state[8], curlen;
+    uint8_t buf[64];
+} SHA256_CTX;
+
+void SHA256_Init(SHA256_CTX *s);
+void SHA256_Update(SHA256_CTX *s, const uint8_t *in, unsigned long inlen);
+void SHA256_Final(uint8_t *out, SHA256_CTX *s);
+void SHA256(const uint8_t *buf, int buf_len, uint8_t *out);
+
+#endif /* SHA256_H */