shachain: allow overriding of number of bits, add cmdline tool.

[ccan] / ccan / crypto / sha256 / sha256.c

diff --git a/ccan/crypto/sha256/sha256.c b/ccan/crypto/sha256/sha256.c
index 95c700692ce50a0f2a57163a41706f9bb8980c79..d42b47b0a587c3df97b0e67f785800715cc12da8 100644 (file)
--- a/ccan/crypto/sha256/sha256.c
+++ b/ccan/crypto/sha256/sha256.c
@@ -8,6 +8,7 @@
  */
 #include <ccan/crypto/sha256/sha256.h>
 #include <ccan/endian/endian.h>
+#include <ccan/compiler/compiler.h>
 #include <stdbool.h>
 #include <assert.h>
 #include <string.h>
@@ -17,16 +18,16 @@ static void invalidate_sha256(struct sha256_ctx *ctx)
 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
        ctx->c.md_len = 0;
 #else
-       ctx->bytes = -1ULL;
+       ctx->bytes = (size_t)-1;
 #endif
 }
 
-static void check_sha256(struct sha256_ctx *ctx)
+static void check_sha256(struct sha256_ctx *ctx UNUSED)
 {
 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
        assert(ctx->c.md_len != 0);
 #else
-       assert(ctx->bytes != -1ULL);
+       assert(ctx->bytes != (size_t)-1);
 #endif
 }
 
@@ -166,7 +167,7 @@ static void Transform(uint32_t *s, const uint32_t *chunk)
        s[7] += h;
 }
 
-static bool alignment_ok(const void *p, size_t n)
+static bool alignment_ok(const void *p UNUSED, size_t n UNUSED)
 {
 #if HAVE_UNALIGNED_ACCESS
        return true;
@@ -228,9 +229,9 @@ void sha256_done(struct sha256_ctx *ctx, struct sha256 *res)
        uint64_t sizedesc;
        size_t i;
 
-       sizedesc = cpu_to_be64(ctx->bytes << 3);
+       sizedesc = cpu_to_be64((uint64_t)ctx->bytes << 3);
        /* Add '1' bit to terminate, then all 0 bits, up to next block - 8. */
-       add(ctx, pad, 1 + ((119 - (ctx->bytes % 64)) % 64));
+       add(ctx, pad, 1 + ((128 - 8 - (ctx->bytes % 64) - 1) % 64));
        /* Add number of bits of data (big endian) */
        add(ctx, &sizedesc, 8);
        for (i = 0; i < sizeof(ctx->s) / sizeof(ctx->s[0]); i++)