diff options
Diffstat (limited to 'thirdparty/mbedtls/library/asn1write.c')
| -rw-r--r-- | thirdparty/mbedtls/library/asn1write.c | 410 |
1 files changed, 206 insertions, 204 deletions
diff --git a/thirdparty/mbedtls/library/asn1write.c b/thirdparty/mbedtls/library/asn1write.c index 4b59927cbb..0b487dceaa 100644 --- a/thirdparty/mbedtls/library/asn1write.c +++ b/thirdparty/mbedtls/library/asn1write.c @@ -28,452 +28,454 @@ #include "mbedtls/platform.h" -int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start, size_t len ) +int mbedtls_asn1_write_len(unsigned char **p, unsigned char *start, size_t len) { - if( len < 0x80 ) - { - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (len < 0x80) { + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = (unsigned char) len; - return( 1 ); + return 1; } - if( len <= 0xFF ) - { - if( *p - start < 2 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (len <= 0xFF) { + if (*p - start < 2) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = (unsigned char) len; *--(*p) = 0x81; - return( 2 ); + return 2; } - if( len <= 0xFFFF ) - { - if( *p - start < 3 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (len <= 0xFFFF) { + if (*p - start < 3) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } - *--(*p) = MBEDTLS_BYTE_0( len ); - *--(*p) = MBEDTLS_BYTE_1( len ); + *--(*p) = MBEDTLS_BYTE_0(len); + *--(*p) = MBEDTLS_BYTE_1(len); *--(*p) = 0x82; - return( 3 ); + return 3; } - if( len <= 0xFFFFFF ) - { - if( *p - start < 4 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (len <= 0xFFFFFF) { + if (*p - start < 4) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } - *--(*p) = MBEDTLS_BYTE_0( len ); - *--(*p) = MBEDTLS_BYTE_1( len ); - *--(*p) = MBEDTLS_BYTE_2( len ); + *--(*p) = MBEDTLS_BYTE_0(len); + *--(*p) = MBEDTLS_BYTE_1(len); + *--(*p) = MBEDTLS_BYTE_2(len); *--(*p) = 0x83; - return( 4 ); + return 4; } int len_is_valid = 1; #if SIZE_MAX > 0xFFFFFFFF - len_is_valid = ( len <= 0xFFFFFFFF ); + len_is_valid = (len <= 0xFFFFFFFF); #endif - if( len_is_valid ) - { - if( *p - start < 5 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); - - *--(*p) = MBEDTLS_BYTE_0( len ); - *--(*p) = MBEDTLS_BYTE_1( len ); - *--(*p) = MBEDTLS_BYTE_2( len ); - *--(*p) = MBEDTLS_BYTE_3( len ); + if (len_is_valid) { + if (*p - start < 5) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } + + *--(*p) = MBEDTLS_BYTE_0(len); + *--(*p) = MBEDTLS_BYTE_1(len); + *--(*p) = MBEDTLS_BYTE_2(len); + *--(*p) = MBEDTLS_BYTE_3(len); *--(*p) = 0x84; - return( 5 ); + return 5; } - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); + return MBEDTLS_ERR_ASN1_INVALID_LENGTH; } -int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start, unsigned char tag ) +int mbedtls_asn1_write_tag(unsigned char **p, unsigned char *start, unsigned char tag) { - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = tag; - return( 1 ); + return 1; } -int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start, - const unsigned char *buf, size_t size ) +int mbedtls_asn1_write_raw_buffer(unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t size) { size_t len = 0; - if( *p < start || (size_t)( *p - start ) < size ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (*p < start || (size_t) (*p - start) < size) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } len = size; (*p) -= len; - memcpy( *p, buf, len ); + memcpy(*p, buf, len); - return( (int) len ); + return (int) len; } #if defined(MBEDTLS_BIGNUM_C) -int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, const mbedtls_mpi *X ) +int mbedtls_asn1_write_mpi(unsigned char **p, unsigned char *start, const mbedtls_mpi *X) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; // Write the MPI // - len = mbedtls_mpi_size( X ); + len = mbedtls_mpi_size(X); /* DER represents 0 with a sign bit (0=nonnegative) and 7 value bits, not * as 0 digits. We need to end up with 020100, not with 0200. */ - if( len == 0 ) + if (len == 0) { len = 1; + } - if( *p < start || (size_t)( *p - start ) < len ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (*p < start || (size_t) (*p - start) < len) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } (*p) -= len; - MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( X, *p, len ) ); + MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(X, *p, len)); // DER format assumes 2s complement for numbers, so the leftmost bit // should be 0 for positive numbers and 1 for negative numbers. // - if( X->s ==1 && **p & 0x80 ) - { - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (X->s == 1 && **p & 0x80) { + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = 0x00; len += 1; } - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_INTEGER)); ret = (int) len; cleanup: - return( ret ); + return ret; } #endif /* MBEDTLS_BIGNUM_C */ -int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start ) +int mbedtls_asn1_write_null(unsigned char **p, unsigned char *start) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; // Write NULL // - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, 0) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_NULL ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, 0)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_NULL)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start, - const char *oid, size_t oid_len ) +int mbedtls_asn1_write_oid(unsigned char **p, unsigned char *start, + const char *oid, size_t oid_len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, - (const unsigned char *) oid, oid_len ) ); - MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_raw_buffer(p, start, + (const unsigned char *) oid, oid_len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_OID)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start, - const char *oid, size_t oid_len, - size_t par_len ) +int mbedtls_asn1_write_algorithm_identifier(unsigned char **p, unsigned char *start, + const char *oid, size_t oid_len, + size_t par_len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - if( par_len == 0 ) - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_null( p, start ) ); - else + if (par_len == 0) { + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_null(p, start)); + } else { len += par_len; + } - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_oid(p, start, oid, oid_len)); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, + MBEDTLS_ASN1_CONSTRUCTED | + MBEDTLS_ASN1_SEQUENCE)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start, int boolean ) +int mbedtls_asn1_write_bool(unsigned char **p, unsigned char *start, int boolean) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = (boolean) ? 255 : 0; len++; - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BOOLEAN ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_BOOLEAN)); - return( (int) len ); + return (int) len; } -static int asn1_write_tagged_int( unsigned char **p, unsigned char *start, int val, int tag ) +static int asn1_write_tagged_int(unsigned char **p, unsigned char *start, int val, int tag) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - do - { - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + do { + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } len += 1; *--(*p) = val & 0xff; val >>= 8; - } - while( val > 0 ); + } while (val > 0); - if( **p & 0x80 ) - { - if( *p - start < 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (**p & 0x80) { + if (*p - start < 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } *--(*p) = 0x00; len += 1; } - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, tag ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, tag)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val ) +int mbedtls_asn1_write_int(unsigned char **p, unsigned char *start, int val) { - return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_INTEGER ) ); + return asn1_write_tagged_int(p, start, val, MBEDTLS_ASN1_INTEGER); } -int mbedtls_asn1_write_enum( unsigned char **p, unsigned char *start, int val ) +int mbedtls_asn1_write_enum(unsigned char **p, unsigned char *start, int val) { - return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_ENUMERATED ) ); + return asn1_write_tagged_int(p, start, val, MBEDTLS_ASN1_ENUMERATED); } -int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start, int tag, - const char *text, size_t text_len ) +int mbedtls_asn1_write_tagged_string(unsigned char **p, unsigned char *start, int tag, + const char *text, size_t text_len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, - (const unsigned char *) text, text_len ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_raw_buffer(p, start, + (const unsigned char *) text, + text_len)); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, tag ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, tag)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start, - const char *text, size_t text_len ) +int mbedtls_asn1_write_utf8_string(unsigned char **p, unsigned char *start, + const char *text, size_t text_len) { - return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_UTF8_STRING, text, text_len) ); + return mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_UTF8_STRING, text, text_len); } -int mbedtls_asn1_write_printable_string( unsigned char **p, unsigned char *start, - const char *text, size_t text_len ) +int mbedtls_asn1_write_printable_string(unsigned char **p, unsigned char *start, + const char *text, size_t text_len) { - return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_PRINTABLE_STRING, text, text_len) ); + return mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_PRINTABLE_STRING, text, + text_len); } -int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start, - const char *text, size_t text_len ) +int mbedtls_asn1_write_ia5_string(unsigned char **p, unsigned char *start, + const char *text, size_t text_len) { - return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_IA5_STRING, text, text_len) ); + return mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_IA5_STRING, text, text_len); } -int mbedtls_asn1_write_named_bitstring( unsigned char **p, - unsigned char *start, - const unsigned char *buf, - size_t bits ) +int mbedtls_asn1_write_named_bitstring(unsigned char **p, + unsigned char *start, + const unsigned char *buf, + size_t bits) { size_t unused_bits, byte_len; const unsigned char *cur_byte; unsigned char cur_byte_shifted; unsigned char bit; - byte_len = ( bits + 7 ) / 8; - unused_bits = ( byte_len * 8 ) - bits; + byte_len = (bits + 7) / 8; + unused_bits = (byte_len * 8) - bits; /* * Named bitstrings require that trailing 0s are excluded in the encoding * of the bitstring. Trailing 0s are considered part of the 'unused' bits * when encoding this value in the first content octet */ - if( bits != 0 ) - { + if (bits != 0) { cur_byte = buf + byte_len - 1; cur_byte_shifted = *cur_byte >> unused_bits; - for( ; ; ) - { + for (;;) { bit = cur_byte_shifted & 0x1; cur_byte_shifted >>= 1; - if( bit != 0 ) + if (bit != 0) { break; + } bits--; - if( bits == 0 ) + if (bits == 0) { break; + } - if( bits % 8 == 0 ) + if (bits % 8 == 0) { cur_byte_shifted = *--cur_byte; + } } } - return( mbedtls_asn1_write_bitstring( p, start, buf, bits ) ); + return mbedtls_asn1_write_bitstring(p, start, buf, bits); } -int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start, - const unsigned char *buf, size_t bits ) +int mbedtls_asn1_write_bitstring(unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t bits) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; size_t unused_bits, byte_len; - byte_len = ( bits + 7 ) / 8; - unused_bits = ( byte_len * 8 ) - bits; + byte_len = (bits + 7) / 8; + unused_bits = (byte_len * 8) - bits; - if( *p < start || (size_t)( *p - start ) < byte_len + 1 ) - return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); + if (*p < start || (size_t) (*p - start) < byte_len + 1) { + return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; + } len = byte_len + 1; /* Write the bitstring. Ensure the unused bits are zeroed */ - if( byte_len > 0 ) - { + if (byte_len > 0) { byte_len--; - *--( *p ) = buf[byte_len] & ~( ( 0x1 << unused_bits ) - 1 ); - ( *p ) -= byte_len; - memcpy( *p, buf, byte_len ); + *--(*p) = buf[byte_len] & ~((0x1 << unused_bits) - 1); + (*p) -= byte_len; + memcpy(*p, buf, byte_len); } /* Write unused bits */ - *--( *p ) = (unsigned char)unused_bits; + *--(*p) = (unsigned char) unused_bits; - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_BIT_STRING)); - return( (int) len ); + return (int) len; } -int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start, - const unsigned char *buf, size_t size ) +int mbedtls_asn1_write_octet_string(unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t size) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t len = 0; - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, buf, size ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_raw_buffer(p, start, buf, size)); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); - MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) ); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); + MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, MBEDTLS_ASN1_OCTET_STRING)); - return( (int) len ); + return (int) len; } /* This is a copy of the ASN.1 parsing function mbedtls_asn1_find_named_data(), * which is replicated to avoid a dependency ASN1_WRITE_C on ASN1_PARSE_C. */ static mbedtls_asn1_named_data *asn1_find_named_data( - mbedtls_asn1_named_data *list, - const char *oid, size_t len ) + mbedtls_asn1_named_data *list, + const char *oid, size_t len) { - while( list != NULL ) - { - if( list->oid.len == len && - memcmp( list->oid.p, oid, len ) == 0 ) - { + while (list != NULL) { + if (list->oid.len == len && + memcmp(list->oid.p, oid, len) == 0) { break; } list = list->next; } - return( list ); + return list; } mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( - mbedtls_asn1_named_data **head, - const char *oid, size_t oid_len, - const unsigned char *val, - size_t val_len ) + mbedtls_asn1_named_data **head, + const char *oid, size_t oid_len, + const unsigned char *val, + size_t val_len) { mbedtls_asn1_named_data *cur; - if( ( cur = asn1_find_named_data( *head, oid, oid_len ) ) == NULL ) - { + if ((cur = asn1_find_named_data(*head, oid, oid_len)) == NULL) { // Add new entry if not present yet based on OID // - cur = (mbedtls_asn1_named_data*)mbedtls_calloc( 1, - sizeof(mbedtls_asn1_named_data) ); - if( cur == NULL ) - return( NULL ); + cur = (mbedtls_asn1_named_data *) mbedtls_calloc(1, + sizeof(mbedtls_asn1_named_data)); + if (cur == NULL) { + return NULL; + } cur->oid.len = oid_len; - cur->oid.p = mbedtls_calloc( 1, oid_len ); - if( cur->oid.p == NULL ) - { - mbedtls_free( cur ); - return( NULL ); + cur->oid.p = mbedtls_calloc(1, oid_len); + if (cur->oid.p == NULL) { + mbedtls_free(cur); + return NULL; } - memcpy( cur->oid.p, oid, oid_len ); + memcpy(cur->oid.p, oid, oid_len); cur->val.len = val_len; - if( val_len != 0 ) - { - cur->val.p = mbedtls_calloc( 1, val_len ); - if( cur->val.p == NULL ) - { - mbedtls_free( cur->oid.p ); - mbedtls_free( cur ); - return( NULL ); + if (val_len != 0) { + cur->val.p = mbedtls_calloc(1, val_len); + if (cur->val.p == NULL) { + mbedtls_free(cur->oid.p); + mbedtls_free(cur); + return NULL; } } cur->next = *head; *head = cur; - } - else if( val_len == 0 ) - { - mbedtls_free( cur->val.p ); + } else if (val_len == 0) { + mbedtls_free(cur->val.p); cur->val.p = NULL; - } - else if( cur->val.len != val_len ) - { + } else if (cur->val.len != val_len) { /* * Enlarge existing value buffer if needed * Preserve old data until the allocation succeeded, to leave list in * a consistent state in case allocation fails. */ - void *p = mbedtls_calloc( 1, val_len ); - if( p == NULL ) - return( NULL ); + void *p = mbedtls_calloc(1, val_len); + if (p == NULL) { + return NULL; + } - mbedtls_free( cur->val.p ); + mbedtls_free(cur->val.p); cur->val.p = p; cur->val.len = val_len; } - if( val != NULL && val_len != 0 ) - memcpy( cur->val.p, val, val_len ); + if (val != NULL && val_len != 0) { + memcpy(cur->val.p, val, val_len); + } - return( cur ); + return cur; } #endif /* MBEDTLS_ASN1_WRITE_C */ |