From e61e8eab0ed72cba26134860e9976f836728d877 Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Wed, 15 Dec 2021 18:00:32 +0000
Subject: Consolidate various ASN.1 code.

Rather than having multiple files per type (with minimal code per file),
use one file per type (a_<type>.c).

No functional change.

Discussed with tb@
---
 src/lib/libcrypto/asn1/a_int.c | 131 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 130 insertions(+), 1 deletion(-)

(limited to 'src/lib/libcrypto/asn1/a_int.c')

diff --git a/src/lib/libcrypto/asn1/a_int.c b/src/lib/libcrypto/asn1/a_int.c
index d14bd7959b..314bd2b369 100644
--- a/src/lib/libcrypto/asn1/a_int.c
+++ b/src/lib/libcrypto/asn1/a_int.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_int.c,v 1.34 2019/04/28 05:03:56 tb Exp $ */
+/* $OpenBSD: a_int.c,v 1.35 2021/12/15 18:00:31 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -62,6 +62,7 @@
 
 #include <openssl/asn1.h>
 #include <openssl/bn.h>
+#include <openssl/buffer.h>
 #include <openssl/err.h>
 
 static int
@@ -101,6 +102,134 @@ ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
 		return ret;
 }
 
+int
+i2a_ASN1_INTEGER(BIO *bp, const ASN1_INTEGER *a)
+{
+	int i, n = 0;
+	static const char h[] = "0123456789ABCDEF";
+	char buf[2];
+
+	if (a == NULL)
+		return (0);
+
+	if (a->type & V_ASN1_NEG) {
+		if (BIO_write(bp, "-", 1) != 1)
+			goto err;
+		n = 1;
+	}
+
+	if (a->length == 0) {
+		if (BIO_write(bp, "00", 2) != 2)
+			goto err;
+		n += 2;
+	} else {
+		for (i = 0; i < a->length; i++) {
+			if ((i != 0) && (i % 35 == 0)) {
+				if (BIO_write(bp, "\\\n", 2) != 2)
+					goto err;
+				n += 2;
+			}
+			buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
+			buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
+			if (BIO_write(bp, buf, 2) != 2)
+				goto err;
+			n += 2;
+		}
+	}
+	return (n);
+
+err:
+	return (-1);
+}
+
+int
+a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size)
+{
+	int ret = 0;
+	int i, j,k, m,n, again, bufsize;
+	unsigned char *s = NULL, *sp;
+	unsigned char *bufp;
+	int num = 0, slen = 0, first = 1;
+
+	bs->type = V_ASN1_INTEGER;
+
+	bufsize = BIO_gets(bp, buf, size);
+	for (;;) {
+		if (bufsize < 1)
+			goto err_sl;
+		i = bufsize;
+		if (buf[i - 1] == '\n')
+			buf[--i] = '\0';
+		if (i == 0)
+			goto err_sl;
+		if (buf[i - 1] == '\r')
+			buf[--i] = '\0';
+		if (i == 0)
+			goto err_sl;
+		if (buf[i - 1] == '\\') {
+			i--;
+			again = 1;
+		} else
+			again = 0;
+		buf[i] = '\0';
+		if (i < 2)
+			goto err_sl;
+
+		bufp = (unsigned char *)buf;
+		if (first) {
+			first = 0;
+			if ((bufp[0] == '0') && (buf[1] == '0')) {
+				bufp += 2;
+				i -= 2;
+			}
+		}
+		k = 0;
+		if (i % 2 != 0) {
+			ASN1error(ASN1_R_ODD_NUMBER_OF_CHARS);
+			goto err;
+		}
+		i /= 2;
+		if (num + i > slen) {
+			if ((sp = recallocarray(s, slen, num + i, 1)) == NULL) {
+				ASN1error(ERR_R_MALLOC_FAILURE);
+				goto err;
+			}
+			s = sp;
+			slen = num + i;
+		}
+		for (j = 0; j < i; j++, k += 2) {
+			for (n = 0; n < 2; n++) {
+				m = bufp[k + n];
+				if ((m >= '0') && (m <= '9'))
+					m -= '0';
+				else if ((m >= 'a') && (m <= 'f'))
+					m = m - 'a' + 10;
+				else if ((m >= 'A') && (m <= 'F'))
+					m = m - 'A' + 10;
+				else {
+					ASN1error(ASN1_R_NON_HEX_CHARACTERS);
+					goto err;
+				}
+				s[num + j] <<= 4;
+				s[num + j] |= m;
+			}
+		}
+		num += i;
+		if (again)
+			bufsize = BIO_gets(bp, buf, size);
+		else
+			break;
+	}
+	bs->length = num;
+	bs->data = s;
+	return (1);
+
+err_sl:
+	ASN1error(ASN1_R_SHORT_LINE);
+err:
+	free(s);
+	return (ret);
+}
 
 /*
  * This converts an ASN1 INTEGER into its content encoding.
-- 
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