mirror of
https://github.com/ioquake/ioq3.git
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62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
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#include "rsa_common.h"
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void fail(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fputs("\n", stderr);
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fflush(stderr);
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exit(1);
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}
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void write_file(const char *fname, const void *buf, const unsigned long len)
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{
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FILE *io = fopen(fname, "wb");
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if (!io) {
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fail("Can't open '%s' for writing: %s", fname, strerror(errno));
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}
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if (fwrite(buf, len, 1, io) != 1) {
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fail("Couldn't write '%s': %s", fname, strerror(errno));
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}
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if (fclose(io) != 0) {
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fail("Couldn't flush '%s' to disk: %s", fname, strerror(errno));
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}
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}
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void read_file(const char *fname, void *buf, unsigned long *len)
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{
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ssize_t br;
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FILE *io = fopen(fname, "rb");
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if (!io) {
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fail("Can't open '%s' for reading: %s", fname, strerror(errno));
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}
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br = fread(buf, 1, *len, io);
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if (ferror(io)) {
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fail("Couldn't read '%s': %s", fname, strerror(errno));
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} else if (!feof(io)) {
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fail("Buffer too small to read '%s'", fname);
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}
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fclose(io);
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*len = (unsigned long) br;
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}
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void read_rsakey(rsa_key *key, const char *fname)
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{
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unsigned char buf[4096];
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unsigned long len = sizeof (buf);
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int rc;
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read_file(fname, buf, &len);
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if ((rc = rsa_import(buf, len, key)) != CRYPT_OK) {
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fail("rsa_import for '%s' failed: %s", fname, error_to_string(rc));
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}
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}
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