diff options
author | Adam Chlipala <adam@chlipala.net> | 2010-12-26 11:13:37 -0500 |
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committer | Adam Chlipala <adam@chlipala.net> | 2010-12-26 11:13:37 -0500 |
commit | bc7000ce141d30e4db4842edd8fa067ac1ec191d (patch) | |
tree | d59424249e21ce243abae8ec042deb0fdeccb3d7 /src/c/openssl.c | |
parent | a090c56aad2934d397d23df2a7b17156b12695a1 (diff) |
Switch from libmhash to OpenSSL
Diffstat (limited to 'src/c/openssl.c')
-rw-r--r-- | src/c/openssl.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/c/openssl.c b/src/c/openssl.c new file mode 100644 index 00000000..6a998e29 --- /dev/null +++ b/src/c/openssl.c @@ -0,0 +1,72 @@ +#include "config.h" + +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> + +#include <openssl/sha.h> + +#define PASSSIZE 4 + +int uw_hash_blocksize = 32; + +static int password[PASSSIZE]; + +char *uw_sig_file = NULL; + +static void random_password() { + int i; + + for (i = 0; i < PASSSIZE; ++i) + password[i] = rand(); +} + +void uw_init_crypto() { + if (uw_sig_file) { + int fd; + + if (access(uw_sig_file, F_OK)) { + random_password(); + + if ((fd = open(uw_sig_file, O_WRONLY | O_CREAT, 0700)) < 0) { + fprintf(stderr, "Can't open signature file %s\n", uw_sig_file); + perror("open"); + exit(1); + } + + if (write(fd, &password, sizeof password) != sizeof password) { + fprintf(stderr, "Error writing signature file\n"); + exit(1); + } + + close(fd); + } else { + if ((fd = open(uw_sig_file, O_RDONLY)) < 0) { + fprintf(stderr, "Can't open signature file %s\n", uw_sig_file); + perror("open"); + exit(1); + } + + if (read(fd, &password, sizeof password) != sizeof password) { + fprintf(stderr, "Error reading signature file\n"); + exit(1); + } + + close(fd); + } + } else + random_password(); +} + +void uw_sign(const char *in, unsigned char *out) { + SHA256_CTX c; + + SHA256_Init(&c); + SHA256_Update(&c, password, sizeof password); + SHA256_Update(&c, in, strlen(in)); + SHA256_Final(out, &c); +} |