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pem: fix valid data length returned by mbedtls_pem_read_buffer()

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ctx->buflen now returns the amount of valid data in ctx->buf.
Unencrypted buffers were already ok, but encrypted ones were
used to return the length of the encrypted buffer, not the
unencrypted one.
This commit fix this behavior for encrypted buffers.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
2024-02-08 17:51:00 +01:00
parent b1f6d2ad6f
commit 2653e92a57
2 changed files with 16 additions and 10 deletions
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6
include/mbedtls/pem.h
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@ -73,11 +73,11 @@ void mbedtls_pem_init(mbedtls_pem_context *ctx);
* \param data source data to look in (must be nul-terminated)
* \param pwd password for decryption (can be NULL)
* \param pwdlen length of password
* \param use_len destination for total length used (set after header is
* correctly read, so unless you get
* \param use_len destination for total length used from data buffer. It is
* set after header is correctly read, so unless you get
* MBEDTLS_ERR_PEM_BAD_INPUT_DATA or
* MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT, use_len is
* the length to skip)
* the length to skip.
*
* \note Attempts to check password correctness by verifying if
* the decrypted text starts with an ASN.1 sequence of