diff options
Diffstat (limited to 'Cryptlib/OpenSSL/crypto/asn1/asn1_par.c')
| -rw-r--r-- | Cryptlib/OpenSSL/crypto/asn1/asn1_par.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/Cryptlib/OpenSSL/crypto/asn1/asn1_par.c b/Cryptlib/OpenSSL/crypto/asn1/asn1_par.c index a5d2da10..e85e3398 100644 --- a/Cryptlib/OpenSSL/crypto/asn1/asn1_par.c +++ b/Cryptlib/OpenSSL/crypto/asn1/asn1_par.c @@ -62,6 +62,10 @@ #include <openssl/objects.h> #include <openssl/asn1.h> +#ifndef ASN1_PARSE_MAXDEPTH +#define ASN1_PARSE_MAXDEPTH 128 +#endif + static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, int indent); static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, @@ -128,6 +132,12 @@ static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, #else dump_indent = 6; /* Because we know BIO_dump_indent() */ #endif + + if (depth > ASN1_PARSE_MAXDEPTH) { + BIO_puts(bp, "BAD RECURSION DEPTH\n"); + return 0; + } + p = *pp; tot = p + length; op = p - 1; @@ -163,6 +173,8 @@ static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0)) goto end; if (j & V_ASN1_CONSTRUCTED) { + const unsigned char *sp; + ep = p + len; if (BIO_write(bp, "\n", 1) <= 0) goto end; @@ -172,6 +184,7 @@ static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, goto end; } if ((j == 0x21) && (len == 0)) { + sp = p; for (;;) { r = asn1_parse2(bp, &p, (long)(tot - p), offset + (p - *pp), depth + 1, @@ -180,19 +193,25 @@ static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, ret = 0; goto end; } - if ((r == 2) || (p >= tot)) + if ((r == 2) || (p >= tot)) { + len = p - sp; break; + } } - } else + } else { + long tmp = len; + while (p < ep) { - r = asn1_parse2(bp, &p, (long)len, - offset + (p - *pp), depth + 1, + sp = p; + r = asn1_parse2(bp, &p, tmp, offset + (p - *pp), depth + 1, indent, dump); if (r == 0) { ret = 0; goto end; } + tmp -= p - sp; } + } } else if (xclass != 0) { p += len; if (BIO_write(bp, "\n", 1) <= 0) |