V_ASN1_APP_CHOOSE has been discouraged by OpenSSL since 2000:;a=blob;f=CHANGES;h=824f421b8d331ba2a2009dbda333a57493bedb1e;hb=fb047ebc87b18bdc4cf9ddee9ee1f5ed93e56aff#l10848

Instead, upstream recommends an MBSTRING_* constant.

This function is a bit overloaded:

MBSTRING_* means "Decode my input from this format and then re-encode it
using whatever string type best suits the NID (usually UTF8String, but
some NIDs require PrintableString)".

V_ASN1_APP_CHOOSE means "This is a Latin-1 string. Without looking at
the NID, pick one of PrintableString, IA5String, or T61String".

The latter is almost certainly not what callers want. If they want a
particular type, they can always force it by passing a particular
V_ASN1_* constant. This removes the only use of ASN1_PRINTABLE_type
within the library, though there is one external use still.

Update-Note: V_ASN1_APP_CHOOSE is removed. I only found one use, which
has been fixed.

Change-Id: Id36376dd0ec68559bbbb366e2305d42be5ddac67
Reviewed-by: Adam Langley <>
2 files changed
tree: f1a51b20bb983a680704edbee61006b49f1635ad
  1. .clang-format
  2. .github/
  3. .gitignore
  7. CMakeLists.txt
  16. codereview.settings
  17. crypto/
  18. decrepit/
  19. fuzz/
  20. go.mod
  21. go.sum
  22. include/
  23. sources.cmake
  24. ssl/
  25. third_party/
  26. tool/
  27. util/


BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.

Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.

Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.

BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.

Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.

Project links:

There are other files in this directory which might be helpful: