Merge pull request 'Add raw SHA inputs and hashtypes to ShaToHex' (#47) from lda/Cytoplasm:sha-revamp into master

Reviewed-on: Telodendria/Cytoplasm#47

include/Cytoplasm/Sha.h

@@ -41,6 +41,16 @@
  * due to the lack of a 64-bit integer type, so that hash
  * function has been omitted.
  */
+#include <stddef.h>
+
+/**
+ * This is an enum to be used to identify the type of SHA used.
+ */
+typedef enum HashType
+{
+    HASH_SHA1,
+    HASH_SHA256
+} HashType;
 
 /**
  * This function takes a pointer to a NULL-terminated C string, and
@@ -64,6 +74,20 @@ extern unsigned char * Sha256(char *);
  */
 extern unsigned char * Sha1(char *);
 
+/**
+ * This function behaves just like 
+ * .Fn Sha256 ,
+ * except that it allows for a generic byte array, instead of a string.
+ */
+extern unsigned char * Sha256Raw(unsigned char *, size_t);
+
+/**
+ * This function behaves just like 
+ * .Fn Sha1 ,
+ * except that it allows for a generic byte array, instead of a string.
+ */
+extern unsigned char * Sha1Raw(unsigned char *, size_t);
+
 /**
  * Convert a SHA byte buffer into a hex string. These hex strings
  * are typically what is transmitted, stored, and compared, however
@@ -71,6 +95,6 @@ extern unsigned char * Sha1(char *);
  * bytes directly, which is why the conversion to a hex string is
  * a separate step.
  */
-extern char * ShaToHex(unsigned char *);
+extern char * ShaToHex(unsigned char *, HashType);
 
 #endif                             /* CYTOPLASM_SHA_H */

src/Sha.c

@@ -28,21 +28,44 @@
 #include <string.h>
 
 char *
-ShaToHex(unsigned char *bytes)
+ShaToHex(unsigned char *bytes, HashType type)
 {
-    size_t i = 0;
-    char *str = Malloc(((strlen((char *) bytes) * 2) + 1) * sizeof(char));
+    size_t i = 0, size;
+    char *str;
 
+    switch (type)
+    {
+        case HASH_SHA1:
+            size = 20;
+            break;
+        case HASH_SHA256:
+            size = 32;
+            break;
+        default:
+            return NULL;
+    }
+
+    str = Malloc(((size * 2) + 1) * sizeof(char));
     if (!str)
     {
         return NULL;
     }
 
-    while (bytes[i] != '\0')
+    for (i = 0; i < size; i++)
     {
         snprintf(str + (2 * i), 3, "%02x", bytes[i]);
-        i++;
     }
 
     return str;
 }
+unsigned char *
+Sha256(char *str)
+{
+    return Sha256Raw((unsigned char *) str, str ? strlen(str) : 0);
+}
+
+unsigned char *
+Sha1(char *str)
+{
+    return Sha1Raw((unsigned char *) str, str ? strlen(str) : 0);
+}

src/Sha/Sha1.c

@@ -29,12 +29,12 @@
 #include <limits.h>
 
 /* TODO: Verify LibreSSL support later */
-#if TLS_IMPL == TLS_OPENSSL
+#if defined(TLS_IMPL) && (TLS_IMPL == TLS_OPENSSL)
 
 #include <openssl/sha.h>
     
 unsigned char *
-Sha1(char *str)
+Sha1Raw(unsigned char *str, size_t len)
 {
     unsigned char *digest;
     if (!str)
@@ -43,7 +43,7 @@ Sha1(char *str)
     }
 
     digest = Malloc(20 + 1);
-    SHA1((unsigned char *) str, strlen(str), digest);
+    SHA1(str, len, digest);
     digest[20] = '\0';
     return digest;
 }
@@ -261,7 +261,7 @@ Sha1Calculate(Sha1Context * ctx, unsigned char *out)
 }
 
 unsigned char *
-Sha1(char *str)
+Sha1Raw(unsigned char *str, size_t len)
 {
     Sha1Context ctx;
     unsigned char *out;
@@ -278,7 +278,7 @@ Sha1(char *str)
     }
 
     Sha1Init(&ctx);
-    Sha1Update(&ctx, str, strlen(str));
+    Sha1Update(&ctx, str, len);
     Sha1Calculate(&ctx, out);
 
     out[160 / 8] = '\0';

src/Sha/Sha256.c

@@ -31,12 +31,12 @@
 
 
 /* TODO: Verify LibreSSL support later */
-#if TLS_IMPL == TLS_OPENSSL
+#if defined(TLS_IMPL) && (TLS_IMPL == TLS_OPENSSL)
 
 #include <openssl/sha.h>
 
 unsigned char *
-Sha256(char *str)
+Sha256Raw(unsigned char *str, size_t len)
 {
     unsigned char *digest;
     if (!str)
@@ -45,7 +45,7 @@ Sha256(char *str)
     }
 
     digest = Malloc(32 + 1);
-    SHA256((unsigned char *) str, strlen(str), digest);
+    SHA256(str, len, digest);
     digest[32] = '\0';
     return digest;
 }
@@ -192,7 +192,7 @@ Sha256Process(Sha256Context * context, unsigned char *data, size_t length)
 }
 
 unsigned char *
-Sha256(char *str)
+Sha256Raw(unsigned char *str, size_t len)
 {
     Sha256Context context;
     size_t i;
@@ -228,7 +228,7 @@ Sha256(char *str)
     context.length = 0;
     memset(context.buffer, 0, 64);
 
-    Sha256Process(&context, (unsigned char *) str, strlen(str));
+    Sha256Process(&context, str, len);
 
     memset(fill, 0, 64);
     fill[0] = 0x80;

src/Tls/TlsLibreSSL.c

@@ -23,7 +23,7 @@
  */
 #include <Tls.h>
 
-#if TLS_IMPL == TLS_LIBRESSL
+#if defined(TLS_IMPL) && (TLS_IMPL == TLS_LIBRESSL)
 
 #include <Memory.h>
 #include <Log.h>

src/Tls/TlsOpenSSL.c

@@ -23,7 +23,7 @@
  */
 #include <Tls.h>
 
-#if TLS_IMPL == TLS_OPENSSL
+#if defined(TLS_IMPL) && (TLS_IMPL == TLS_OPENSSL)
 
 #include <Memory.h>
 #include <Log.h>