sick

sign and check files using ed25519
git clone git://z3bra.org/sick
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commit a92ed5dba1cf5168b8b7db759641bed54e7751bd
parent 0a1faeea7f13aa5c473500e50674877f92fe6edc
Author: z3bra <willyatmailoodotorg>
Date:   Sun May 15 19:24:44 2016

Change bufferize() prototype

Write buffer to a `signed char *` rather than `unsigned`. Make it
easier and saner to deal with internally.
sign() uses memcpy to convert the buffer from `signed` to `unsigned`.

Diffstat:
 sick.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/sick.c b/sick.c @@ -18,7 +18,7 @@ enum { }; static void usage(); -static size_t bufferize(unsigned char **buf, FILE *fp); +static size_t bufferize(char **buf, FILE *fp); static int createkeypair(const char *); static int sign(FILE *fp, FILE *key); @@ -36,7 +36,7 @@ usage() * read chunks of data from a stream into a buffer, and return the size of the buffer */ static size_t -bufferize(unsigned char **buf, FILE *fp) +bufferize(char **buf, FILE *fp) { size_t n, len = 0; char chunk[MAX_INPUT], *tmp; @@ -48,7 +48,7 @@ bufferize(unsigned char **buf, FILE *fp) return 0; } - *buf = (unsigned char *)tmp; + *buf = tmp; memcpy((*buf) + len, chunk, n); len += n; } @@ -111,16 +111,20 @@ int sign(FILE *fp, FILE *key) { size_t len; - char *base64; + char *base64, *buf = NULL; unsigned char sig[64], priv[64], *msg = NULL; if (!fread(priv, 1, 64, key)) return -1; - len = bufferize(&msg, fp); + len = bufferize(&buf, fp); if (len == 0) return -1; + msg = malloc(len); + memcpy(msg, buf, len); + free(buf); + ed25519_sign(sig, msg, len, priv); /* write buffer to stdout .. */ @@ -133,6 +137,7 @@ sign(FILE *fp, FILE *key) /* .. then the base64 encoded signature .. */ len = base64_encode(&base64, sig, 64); base64_fold(stdout, base64, len, 0); + free(base64); /* .. and the final signature delimiter! */ fwrite(SIGEND, 1, sizeof(SIGEND), stdout);