m misc

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 101 insertions, 0 deletions

diff --git a/libhashsum_get_algorithm_string.c b/libhashsum_get_algorithm_string.c
new file mode 100644
index 0000000..5f910be
--- /dev/null
+++ b/libhashsum_get_algorithm_string.c
@@ -0,0 +1,101 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+#if defined(__GNUC__)
+__attribute__((__pure__))
+#endif
+static int
+equiv(const char *a, const char *b)
+{
+	while (*a && *b && *b != '[') {
+		if (tolower(*a) == tolower(*b) || (*b == '/' && (*a == '-' || *a == '_'))) {
+			a++;
+			b++;
+		} else if (*b == '-' && !isdigit(b[-1])) {
+			b++;
+		} else {
+			return 0;
+		}
+	}
+	if (!strncasecmp(a, "sum", 3))
+		a = &a[3];
+	return !*a && (!*b || *b == '[');
+}
+
+
+int
+libhashsum_get_algorithm_string(enum libhashsum_algorithm *algorithm_out, const char *algorithm)
+{
+	if (equiv(algorithm, "MD2"))
+		*algorithm_out = LIBHASHSUM_MD2;
+	else if (equiv(algorithm, "MD4"))
+		*algorithm_out = LIBHASHSUM_MD4;
+	else if (equiv(algorithm, "MD5"))
+		*algorithm_out = LIBHASHSUM_MD5;
+	else if (equiv(algorithm, "RIPEMD-128") || equiv(algorithm, "RMD-128"))
+		*algorithm_out = LIBHASHSUM_RIPEMD_128;
+	else if (equiv(algorithm, "RIPEMD-160") || equiv(algorithm, "RMD-160"))
+		*algorithm_out = LIBHASHSUM_RIPEMD_160;
+	else if (equiv(algorithm, "RIPEMD-256") || equiv(algorithm, "RMD-256"))
+		*algorithm_out = LIBHASHSUM_RIPEMD_256;
+	else if (equiv(algorithm, "RIPEMD-320") || equiv(algorithm, "RMD-320"))
+		*algorithm_out = LIBHASHSUM_RIPEMD_320;
+	else if (equiv(algorithm, "SHA-0"))
+		*algorithm_out = LIBHASHSUM_SHA0;
+	else if (equiv(algorithm, "SHA-1"))
+		*algorithm_out = LIBHASHSUM_SHA1;
+	else if (equiv(algorithm, "SHA-224") || equiv(algorithm, "SHA-2-224"))
+		*algorithm_out = LIBHASHSUM_SHA_224;
+	else if (equiv(algorithm, "SHA-256") || equiv(algorithm, "SHA-2-256"))
+		*algorithm_out = LIBHASHSUM_SHA_256;
+	else if (equiv(algorithm, "SHA-384") || equiv(algorithm, "SHA-2-384"))
+		*algorithm_out = LIBHASHSUM_SHA_384;
+	else if (equiv(algorithm, "SHA-512") || equiv(algorithm, "SHA-2-512"))
+		*algorithm_out = LIBHASHSUM_SHA_512;
+	else if (equiv(algorithm, "SHA-512/224") || equiv(algorithm, "SHA-2-512/224"))
+		*algorithm_out = LIBHASHSUM_SHA_512_224;
+	else if (equiv(algorithm, "SHA-512/256") || equiv(algorithm, "SHA-2-512/256"))
+		*algorithm_out = LIBHASHSUM_SHA_512_256;
+	else if (equiv(algorithm, "Keccak-224"))
+		*algorithm_out = LIBHASHSUM_KECCAK_224;
+	else if (equiv(algorithm, "Keccak-256"))
+		*algorithm_out = LIBHASHSUM_KECCAK_256;
+	else if (equiv(algorithm, "Keccak-384"))
+		*algorithm_out = LIBHASHSUM_KECCAK_384;
+	else if (equiv(algorithm, "Keccak-512"))
+		*algorithm_out = LIBHASHSUM_KECCAK_512;
+	else if (equiv(algorithm, "SHA-3-224"))
+		*algorithm_out = LIBHASHSUM_SHA3_224;
+	else if (equiv(algorithm, "SHA-3-256"))
+		*algorithm_out = LIBHASHSUM_SHA3_256;
+	else if (equiv(algorithm, "SHA-3-384"))
+		*algorithm_out = LIBHASHSUM_SHA3_384;
+	else if (equiv(algorithm, "SHA-3-512"))
+		*algorithm_out = LIBHASHSUM_SHA3_512;
+	else if (equiv(algorithm, "SHAKE-128[]"))
+		*algorithm_out = LIBHASHSUM_SHAKE128;
+	else if (equiv(algorithm, "SHAKE-256[]"))
+		*algorithm_out = LIBHASHSUM_SHAKE256;
+	else if (equiv(algorithm, "SHAKE-512[]"))
+		*algorithm_out = LIBHASHSUM_SHAKE512;
+	else if (equiv(algorithm, "RawSHAKE-128[]"))
+		*algorithm_out = LIBHASHSUM_RAWSHAKE128;
+	else if (equiv(algorithm, "RawSHAKE-256[]"))
+		*algorithm_out = LIBHASHSUM_RAWSHAKE256;
+	else if (equiv(algorithm, "RawSHAKE-512[]"))
+		*algorithm_out = LIBHASHSUM_RAWSHAKE512;
+	else if (equiv(algorithm, "Keccak[]"))
+		*algorithm_out = LIBHASHSUM_KECCAK;
+	else if (equiv(algorithm, "BLAKE-224[]") || equiv(algorithm, "B224[]"))
+		*algorithm_out = LIBHASHSUM_BLAKE224;
+	else if (equiv(algorithm, "BLAKE-256[]") || equiv(algorithm, "B256[]"))
+		*algorithm_out = LIBHASHSUM_BLAKE256;
+	else if (equiv(algorithm, "BLAKE-384[]") || equiv(algorithm, "B384[]"))
+		*algorithm_out = LIBHASHSUM_BLAKE384;
+	else if (equiv(algorithm, "BLAKE-512[]") || equiv(algorithm, "B512[]"))
+		*algorithm_out = LIBHASHSUM_BLAKE512;
+	else
+		return 0;
+	return 1;
+}