Merge tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

[linux.git] / include / crypto / sha.h

diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 8a46202b185707f163b666821e313c6a7e5bc223..5c2132c7190095bc941dbd2b335234d8d9e12f22 100644 (file)
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -112,4 +112,51 @@ extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
 
 extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
                               unsigned int len, u8 *hash);
+
+/*
+ * Stand-alone implementation of the SHA256 algorithm. It is designed to
+ * have as little dependencies as possible so it can be used in the
+ * kexec_file purgatory. In other cases you should generally use the
+ * hash APIs from include/crypto/hash.h. Especially when hashing large
+ * amounts of data as those APIs may be hw-accelerated.
+ *
+ * For details see lib/crypto/sha256.c
+ */
+
+static inline int sha256_init(struct sha256_state *sctx)
+{
+       sctx->state[0] = SHA256_H0;
+       sctx->state[1] = SHA256_H1;
+       sctx->state[2] = SHA256_H2;
+       sctx->state[3] = SHA256_H3;
+       sctx->state[4] = SHA256_H4;
+       sctx->state[5] = SHA256_H5;
+       sctx->state[6] = SHA256_H6;
+       sctx->state[7] = SHA256_H7;
+       sctx->count = 0;
+
+       return 0;
+}
+extern int sha256_update(struct sha256_state *sctx, const u8 *input,
+                        unsigned int length);
+extern int sha256_final(struct sha256_state *sctx, u8 *hash);
+
+static inline int sha224_init(struct sha256_state *sctx)
+{
+       sctx->state[0] = SHA224_H0;
+       sctx->state[1] = SHA224_H1;
+       sctx->state[2] = SHA224_H2;
+       sctx->state[3] = SHA224_H3;
+       sctx->state[4] = SHA224_H4;
+       sctx->state[5] = SHA224_H5;
+       sctx->state[6] = SHA224_H6;
+       sctx->state[7] = SHA224_H7;
+       sctx->count = 0;
+
+       return 0;
+}
+extern int sha224_update(struct sha256_state *sctx, const u8 *input,
+                        unsigned int length);
+extern int sha224_final(struct sha256_state *sctx, u8 *hash);
+
 #endif