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-rw-r--r--toys/sha1.c160
1 files changed, 75 insertions, 85 deletions
diff --git a/toys/sha1.c b/toys/sha1.c
index 0806d0c7..4180f39c 100644
--- a/toys/sha1.c
+++ b/toys/sha1.c
@@ -1,33 +1,26 @@
/*
-SHA-1 in C
-By Steve Reid <steve@edmweb.com>
-100% Public Domain
-
-Test Vectors (from FIPS PUB 180-1)
-"abc"
- A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
-"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
- 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
-A million repetitions of "a"
- 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
-*/
-
-#define LITTLE_ENDIAN /* This should be #define'd if true. */
+ * Based on the public domain SHA-1 in C by Steve Reid <steve@edmweb.com>
+ * from http://www.mirrors.wiretapped.net/security/cryptography/hashes/sha1/
+ */
+
+/* #define LITTLE_ENDIAN * This should be #define'd if true. */
/* #define SHA1HANDSOFF * Copies data before messing with it. */
+#define LITTLE_ENDIAN
#include <stdio.h>
#include <string.h>
+#include <inttypes.h>
-typedef struct {
- unsigned int state[5];
- unsigned int count[2];
+struct sha1 {
+ uint32_t state[5];
+ uint32_t count[2];
unsigned char buffer[64];
-} SHA1_CTX;
+};
-void SHA1Transform(unsigned int state[5], unsigned char buffer[64]);
-void SHA1Init(SHA1_CTX* context);
-void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned int len);
-void SHA1Final(unsigned char digest[20], SHA1_CTX* context);
+void sha1_init(struct sha1 *this);
+void sha1_transform(unsigned int state[5], unsigned char buffer[64]);
+void sha1_update(struct sha1 *this, unsigned char *data, unsigned int len);
+void sha1_final(struct sha1 *this, unsigned char digest[20]);
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
@@ -49,24 +42,29 @@ void SHA1Final(unsigned char digest[20], SHA1_CTX* context);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
+void printy(unsigned char *this)
+{
+ int i;
+
+ for (i = 0; i < 20; i++) printf("%02x", this[i]);
+ putchar('\n');
+}
/* Hash a single 512-bit block. This is the core of the algorithm. */
-void SHA1Transform(unsigned int state[5], unsigned char buffer[64])
+void sha1_transform(unsigned int state[5], unsigned char buffer[64])
{
-unsigned int a, b, c, d, e;
-typedef union {
- unsigned char c[64];
- unsigned int l[16];
-} CHAR64LONG16;
-CHAR64LONG16* block;
-#ifdef SHA1HANDSOFF
-static unsigned char workspace[64];
+ unsigned int a, b, c, d, e;
+
+ typedef union {
+ unsigned char c[64];
+ unsigned int l[16];
+ } CHAR64LONG16;
+ CHAR64LONG16* block;
+ unsigned char workspace[64];
block = (CHAR64LONG16*)workspace;
memcpy(block, buffer, 64);
-#else
- block = (CHAR64LONG16*)buffer;
-#endif
+
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
@@ -100,6 +98,7 @@ static unsigned char workspace[64];
state[2] += c;
state[3] += d;
state[4] += e;
+
/* Wipe variables */
a = b = c = d = e = 0;
}
@@ -107,69 +106,66 @@ static unsigned char workspace[64];
/* SHA1Init - Initialize new context */
-void SHA1Init(SHA1_CTX* context)
+void sha1_init(struct sha1 *this)
{
/* SHA1 initialization constants */
- context->state[0] = 0x67452301;
- context->state[1] = 0xEFCDAB89;
- context->state[2] = 0x98BADCFE;
- context->state[3] = 0x10325476;
- context->state[4] = 0xC3D2E1F0;
- context->count[0] = context->count[1] = 0;
+ this->state[0] = 0x67452301;
+ this->state[1] = 0xEFCDAB89;
+ this->state[2] = 0x98BADCFE;
+ this->state[3] = 0x10325476;
+ this->state[4] = 0xC3D2E1F0;
+ this->count[0] = this->count[1] = 0;
}
+/* Run your data through this function. */
-/* Run your data through this. */
-
-void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned int len)
+void sha1_update(struct sha1 *this, unsigned char *data, unsigned int len)
{
-unsigned int i, j;
+ unsigned int i, j;
- j = (context->count[0] >> 3) & 63;
- if ((context->count[0] += len << 3) < (len << 3)) context->count[1]++;
- context->count[1] += (len >> 29);
+ j = (this->count[0] >> 3) & 63;
+ if ((this->count[0] += len << 3) < (len << 3)) this->count[1]++;
+ this->count[1] += (len >> 29);
if ((j + len) > 63) {
- memcpy(&context->buffer[j], data, (i = 64-j));
- SHA1Transform(context->state, context->buffer);
- for ( ; i + 63 < len; i += 64) {
- SHA1Transform(context->state, &data[i]);
- }
+ memcpy(this->buffer + j, data, (i = 64-j));
+ sha1_transform(this->state, this->buffer);
+ for ( ; i + 63 < len; i += 64)
+ sha1_transform(this->state, data + i);
j = 0;
}
else i = 0;
- memcpy(&context->buffer[j], &data[i], len - i);
+ memcpy(this->buffer + j, data + i, len - i);
}
/* Add padding and return the message digest. */
-void SHA1Final(unsigned char digest[20], SHA1_CTX* context)
+void sha1_final(struct sha1 *this, unsigned char digest[20])
{
-unsigned int i, j;
-unsigned char finalcount[8];
+ unsigned int i, j;
+ unsigned char finalcount[8];
for (i = 0; i < 8; i++) {
- finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
+ finalcount[i] = (unsigned char)((this->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
}
- SHA1Update(context, (unsigned char *)"\200", 1);
- while ((context->count[0] & 504) != 448) {
- SHA1Update(context, (unsigned char *)"\0", 1);
+ sha1_update(this, (unsigned char *)"\200", 1);
+ while ((this->count[0] & 504) != 448) {
+ sha1_update(this, (unsigned char *)"\0", 1);
}
- SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
+ sha1_update(this, finalcount, 8); /* Should cause a SHA1Transform() */
for (i = 0; i < 20; i++) {
digest[i] = (unsigned char)
- ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
+ ((this->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
/* Wipe variables */
i = j = 0;
- memset(context->buffer, 0, 64);
- memset(context->state, 0, 20);
- memset(context->count, 0, 8);
- memset(&finalcount, 0, 8);
-#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite it's own static vars */
- SHA1Transform(context->state, context->buffer);
-#endif
+ memset(this->buffer, 0, 64);
+ memset(this->state, 0, 20);
+ memset(this->count, 0, 8);
+ memset(finalcount, 0, 8);
+ /* make SHA1Transform overwrite it's own static vars */
+ sha1_transform(this->state, this->buffer);
}
@@ -178,10 +174,10 @@ unsigned char finalcount[8];
int main(int argc, char** argv)
{
-int i, j;
-SHA1_CTX context;
-unsigned char digest[20], buffer[16384];
-FILE* file;
+ int i, j;
+ struct sha1 this;
+ unsigned char digest[20], buffer[16384];
+ FILE* file;
if (argc > 2) {
puts("Public domain SHA-1 implementation - by Steve Reid <steve@edmweb.com>");
@@ -196,20 +192,14 @@ FILE* file;
fputs("Unable to open file.", stderr);
exit(-1);
}
- }
- SHA1Init(&context);
+ }
+ sha1_init(&this);
while (!feof(file)) { /* note: what if ferror(file) */
i = fread(buffer, 1, 16384, file);
- SHA1Update(&context, buffer, i);
+ sha1_update(&this, buffer, i);
}
- SHA1Final(digest, &context);
+ sha1_final(&this, digest);
fclose(file);
- for (i = 0; i < 5; i++) {
- for (j = 0; j < 4; j++) {
- printf("%02X", digest[i*4+j]);
- }
- putchar(' ');
- }
- putchar('\n');
+ printy(digest);
exit(0);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 20:00:25 +0000