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authorticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>2009-10-28 03:27:13 (EDT)
committer ticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>2009-10-28 03:27:13 (EDT)
commit84552e64fa6d42931a5c64c20acc580e9bb6b8bd (patch)
tree83468d4645b4390670403a9a5afb9b3a0387cfbb /libopkg/sha256.h
parent3c9460a62e86e92cac8695317efb6d56ecabfb71 (diff)
Adding sha256.[ch]
Sorry forgot adding them. Thanks for Graham Gower <graham.gower@gmail.com> git-svn-id: http://opkg.googlecode.com/svn/trunk@223 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358
Diffstat (limited to 'libopkg/sha256.h')
-rw-r--r--libopkg/sha256.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/libopkg/sha256.h b/libopkg/sha256.h
new file mode 100644
index 0000000..6a9aed4
--- /dev/null
+++ b/libopkg/sha256.h
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+/* Declarations of functions and data types used for SHA256 and SHA224 sum
+ library functions.
+ Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef SHA256_H
+# define SHA256_H 1
+
+# include <stdio.h>
+# include <stdint.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* Structure to save state of computation between the single steps. */
+struct sha256_ctx
+{
+ uint32_t state[8];
+
+ uint32_t total[2];
+ size_t buflen;
+ uint32_t buffer[32];
+};
+
+enum { SHA224_DIGEST_SIZE = 224 / 8 };
+enum { SHA256_DIGEST_SIZE = 256 / 8 };
+
+/* Initialize structure containing state of computation. */
+extern void sha256_init_ctx (struct sha256_ctx *ctx);
+extern void sha224_init_ctx (struct sha256_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is necessary that LEN is a multiple of 64!!! */
+extern void sha256_process_block (const void *buffer, size_t len,
+ struct sha256_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 64. */
+extern void sha256_process_bytes (const void *buffer, size_t len,
+ struct sha256_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 32 (28) bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest. */
+extern void *sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
+extern void *sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
+
+
+/* Put result from CTX in first 32 (28) bytes following RESBUF. The result is
+ always in little endian byte order, so that a byte-wise output yields
+ to the wanted ASCII representation of the message digest. */
+extern void *sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
+extern void *sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
+
+
+/* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 32 (28) bytes
+ beginning at RESBLOCK. */
+extern int sha256_stream (FILE *stream, void *resblock);
+extern int sha224_stream (FILE *stream, void *resblock);
+
+/* Compute SHA256 (SHA224) message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+extern void *sha256_buffer (const char *buffer, size_t len, void *resblock);
+extern void *sha224_buffer (const char *buffer, size_t len, void *resblock);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif