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Add fix for PEM underflow

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Signed-off-by: Felix Conway <felix.conway@arm.com>
This commit is contained in:
Felix Conway 2025-05-27 16:00:48 +01:00
parent 9325883d9f
commit 6165e71589
1 changed files with 4 additions and 1 deletions
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5
library/pem.c
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@ -243,7 +243,10 @@ exit:
#if defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C)
static int pem_check_pkcs_padding(unsigned char *input, size_t input_len, size_t *data_len)
{
/* input_len > 0 is guaranteed by mbedtls_pem_read_buffer(). */
/* input_len > 0 is not guaranteed by mbedtls_pem_read_buffer(). */
if (input_len < 1) {
return MBEDTLS_ERR_PEM_INVALID_DATA;
}
size_t pad_len = input[input_len - 1];
size_t i;