fix: run stdin

src/ssl/run_stdin.c

@@ -1,15 +1,70 @@
+#include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 
 #include <cli.h>
+#include <libft_ssl.h>
 
 #include "compiler.h"
 #include "ft_ssl.h"
 #include "ft_ssl_flags.h"
 #include "internal/ssl/ssl.h"
 
+/* Forward declarations */
+static int		run_stdin_p(const struct ssl_config *config);
+static ssize_t	read_and_hash(const struct ssl_config *config, union digest_ctx
+		*ctx, char *label, size_t cap);
+/* ------------------- */
+
 int
 run_stdin(const struct ssl_config *config)
 {
+	if (HAS_FLAG(config->flags, FLAG_P) && !HAS_FLAG(config->flags, FLAG_Q))
+		return run_stdin_p(config);
 	return digest_stream(config, STDIN_FILENO, "stdin", 0,
 			HAS_FLAG(config->flags, FLAG_P));
 }
+
+static ssize_t
+read_and_hash(const struct ssl_config *config, union digest_ctx *ctx,
+		char *label, size_t cap)
+{
+	uint8_t	buf[READ_BUFSIZE];
+	size_t	len;
+	ssize_t	n;
+	size_t	take;
+
+	config->algo->init(ctx);
+	len = 0;
+	while (0 < (n = read(STDIN_FILENO, buf, READ_BUFSIZE)))
+	{
+		config->algo->update(ctx, buf, (size_t)n);
+		take = (size_t)n < cap - len ? (size_t)n : cap - len;
+		memcpy(label + len, buf, take);
+		len += take;
+	}
+	return (n < 0 ? -1 : (ssize_t)len);
+}
+
+static int
+run_stdin_p(const struct ssl_config *config)
+{
+	union digest_ctx	ctx;
+	uint8_t				digest[MAX_DIGEST_SIZE];
+	char				label[4097];
+	char				hex[MAX_DIGEST_SIZE * 2 + 1];
+	ssize_t				len;
+	size_t				i;
+
+	len = read_and_hash(config, &ctx, label, sizeof(label) - 1);
+	if (len < 0)
+		return CLI_ERROR;
+	if (len && '\n' == label[len - 1])
+		--len;
+	label[len] = '\0';
+	config->algo->final(&ctx, digest);
+	for (i = 0; i < config->algo->digest_size; i++)
+		snprintf(hex + i * 2, 3, "%02x", (unsigned int)digest[i]);
+	printf("(\"%s\")= %s\n", label, hex);
+	return CLI_SUCCESS;
+}